CN111584978A - Battery module - Google Patents
Battery module Download PDFInfo
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- CN111584978A CN111584978A CN202010575251.8A CN202010575251A CN111584978A CN 111584978 A CN111584978 A CN 111584978A CN 202010575251 A CN202010575251 A CN 202010575251A CN 111584978 A CN111584978 A CN 111584978A
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- 239000003063 flame retardant Substances 0.000 claims description 3
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/658—Means for temperature control structurally associated with the cells by thermal insulation or shielding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/183—Sealing members
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/394—Gas-pervious parts or elements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a battery module, which comprises a box body module, a battery cell module and a sealing module, wherein an installation cavity is formed in the box body module, the box body module comprises a top sealing plate, a plurality of explosion-proof valves are arranged on the top sealing plate, the battery cell module comprises a plurality of sub-battery cell modules, each sub-battery cell module comprises at least two soft-packaged batteries, the at least two soft-packaged batteries are suitable for being stacked along a first direction, a first heat insulation plate is arranged between every two adjacent soft-packaged batteries, the sealing module comprises a second heat insulation plate, the second heat insulation plate is suitable for separating the installation cavity into a plurality of sub-installation cavities, each sub-installation cavity corresponds to at least one explosion-proof valve, each sub-installation cavity is suitable for being sealed through a sealant after being communicated with the corresponding explosion-proof valve, and at least one sub-battery cell module is. The battery module provided by the embodiment of the invention has good sealing performance, and each sub-electric core module is provided with an independent pressure relief cavity, so that the pressure relief effect is good.
Description
Technical Field
The invention relates to the field of electronic batteries, in particular to a battery module.
Background
At present, an electric vehicle is formed by grouping a plurality of small modules, each small module is 3 strings, 4 strings and 6 strings, the maximum string does not exceed 50 strings, but the electric vehicle usually needs more than 80 strings, the optimal string is usually 96 strings to 108 strings, and the maximum efficiency of a motor can be exerted. One set of electric motor car battery system needs be according to whole car series-parallel connection requirement, a lot of little modules, and other spare parts, assemble the battery box, it is troublesome that the equipment of battery system spare part is many, battery box protection battery module is mechanical simultaneously, safety on the sealing, and increase explosion-proof pressure release part on the battery box, ensure that battery system can be directional when the pressure release, safety release, but there is a battery to release, high-temperature gas is when explosion-proof valve, can disturb other batteries, lead to other electric cores to catch fire and take place thermal runaway.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, an object of the present invention is to provide a battery module having good sealing performance, and each sub-core module has an independent pressure relief cavity, so that the pressure relief effect is good.
According to the battery module of the embodiment of the present invention, the battery module includes: the box body module is internally provided with a mounting cavity and comprises a top sealing plate, and a plurality of explosion-proof valves are arranged on the top sealing plate; the battery cell module is arranged in the installation cavity and comprises a plurality of sub-battery cell modules, each sub-battery cell module comprises at least two soft-packaged batteries, the at least two soft-packaged batteries are suitable for being stacked along a first direction, a first heat insulation plate is arranged between every two adjacent soft-packaged batteries, and the soft-packaged batteries and the first heat insulation plates are suitable for being bonded through sealing glue; the sealing module comprises a second heat insulation plate, the second heat insulation plate is suitable for separating the installation cavity into a plurality of sub-installation cavities, each sub-installation cavity corresponds to at least one explosion-proof valve, each sub-installation cavity is suitable for being sealed through sealant after being communicated with the corresponding explosion-proof valve, and each sub-installation cavity is suitable for being provided with at least one sub-electric core module.
According to the battery module provided by the embodiment of the invention, the first heat insulation plate is arranged between two adjacent soft package batteries, and the first heat insulation plate and the soft package batteries are sealed by the sealant, so that each soft package battery of each sub-battery core module can be independently arranged in the sub-installation cavity, even if one soft package battery is damaged, the adjacent soft package batteries can be less influenced, furthermore, the second heat insulation plate is arranged between two adjacent sub-battery core modules, the length of the second heat insulation plate is larger than that of the sub-battery core module, under the action of the sealant, an independent pressure relief cavity with good sealing performance can be constructed between each sub-installation cavity and the explosion-proof valve, high-temperature and high-pressure gas generated after the sub-battery core module in the pressure relief cavity is failed can only be discharged from the corresponding explosion-proof valve, and the damage to the sub-battery core module in the adjacent sub-installation cavity or the adjacent explosion-proof valve can not be caused, from this, the battery module leakproofness of this application embodiment is good, can protect sub-electric core module, explosion-proof valve and the laminate polymer battery in every sub-electric core module betterly.
In addition, according to the battery module of the present invention, the following additional features may be provided:
in some embodiments of the invention, the sub-cell module comprises: at least one pile lamellar body, it is a plurality of laminate polymer battery and a plurality of first heat insulating board passes through the insulating cement and bonds and form the pile body, and is a plurality of the pile body is suitable for along the second direction series connection welding and forms the pile body, works as when the pile body is equipped with a plurality of, and is a plurality of the pile body is suitable for to be followed the first direction piles up, the first direction with mutually perpendicular between the second direction, adjacent two it has first heat insulating board, adjacent two to bond through the insulating cement between the pile body the both ends of the pile body are parallelly connected through the busbar respectively.
In some embodiments of the present invention, the battery module further includes: a glue seal comprised of fire retardant glue and/or non-combustible foam glue, said glue seal adapted to be poured into a weld region of said stack, said glue seal adapted to cooperate with said first heat shield to separate a plurality of pressure relief chambers within each of said sub-mounting cavities, said plurality of pressure relief chambers adapted to correspond to at least one of said explosion vent valves.
In some embodiments of the present invention, the case module further includes a bottom sealing plate, and the battery module further includes: the cooling module comprises a first heat exchange system and a second heat exchange system which are respectively formed in the top sealing plate and the bottom sealing plate, and the first heat exchange system and the second heat exchange system are suitable for refrigerating or heating the battery cell module from the bottom and the top of the battery cell module.
In some embodiments of the invention, the space between the cell module and the top sealing plate and the space between the cell module and the bottom sealing plate are adapted to be filled with a heat conducting glue, the heat conducting glue is adapted to bond the top sealing plate and the bottom sealing plate to the top and the bottom of the cell module, and the heat conducting glue is adapted to cooperate with the second heat insulating plate to seal the two sub-mounting cavities connected at the top and the bottom separately.
In some embodiments of the invention, the top seal plate comprises: the first heat exchange system is formed into cooling pipelines which are uniformly distributed on the cooling plate, a plurality of explosion-proof holes are formed in the cooling plate, and the explosion-proof holes and the cooling pipelines are arranged in a staggered mode; the insulating layer comprises an insulating film, and the insulating film is arranged on the side surface, facing the battery cell module, of the cooling plate; the explosion-proof membrane layer, the explosion-proof membrane layer includes a plurality of rupture membranes, a plurality of rupture membranes with explosion-proof hole one-to-one sets up.
In some embodiments of the invention, the case module further comprises: left side frame and right frame, left side frame with right frame is suitable for respectively to be in through the structural adhesive bonding the left and right sides of electricity core module, left side frame with right frame all includes: the pressure relief plate is internally provided with a fire extinguishing pressure relief flue extending along a first direction, one side of the pressure relief plate facing the battery cell module is provided with a plurality of first pressure relief holes, the plurality of first pressure relief holes correspond to the plurality of sub-installation cavities one by one, and high-temperature and high-pressure gas or flame released by the stacking body is suitable for entering the fire extinguishing pressure relief flue from the first pressure relief holes; the insulating layer comprises insulating films, and the insulating films are respectively arranged on the left frame and the right frame and face one side of the battery cell module.
In some embodiments of the present invention, a plurality of second pressure relief holes are formed in a side of the pressure relief plate away from the electric core module, the plurality of first pressure relief holes and the plurality of second pressure relief holes are aligned to each other in the first direction, at least one end of the fire extinguishing pressure relief flue in the second direction has a pressure relief opening, and the high-temperature high-pressure gas or flame entering the fire extinguishing pressure relief flue is suitable for being released to the outside from the pressure relief opening and the second pressure relief holes after the fire extinguishing treatment of the fire extinguishing pressure relief flue.
In some embodiments of the invention, the case module further comprises: a bottom sealing plate located at a bottom of the cell module, the sealing module further comprising: the upper sealing ring covers the top of the first heat insulation plate and at least one part of the opening at the top of the sub-installation cavity, is positioned at the lower end of the top sealing plate, and is suitable for being matched with the top sealing plate to seal the top of the sub-installation cavity; the lower sealing ring covers the bottom of the first heat insulation plate and at least one part of the opening at the bottom of the sub-installation cavity, is positioned at the upper end of the bottom sealing plate, and is suitable for being matched with the bottom sealing plate to seal the bottom of the sub-installation cavity.
In some embodiments of the invention, the battery module further comprises a detection module, the detection module comprises a plurality of collecting sheets, each collecting sheet is provided with a plurality of detection contacts, and each detection contact is suitable for being connected with at least one of a positive electrode and a negative electrode of each soft package battery.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural view of a battery module according to an embodiment of the present invention;
fig. 2 is an exploded view of a battery module according to an embodiment of the present invention with a bottom sealing plate removed;
fig. 3 is an exploded view of a battery module according to an embodiment of the present invention with a top sealing plate removed;
fig. 4 is a schematic structural view of a battery module according to an embodiment of the present invention, with a bottom sealing plate removed;
fig. 5 is an exploded schematic view of a case module of a battery module according to an embodiment of the present invention;
fig. 6 is a schematic structural view of an upper sealing ring of a battery module according to an embodiment of the present invention;
fig. 7 is a schematic structural view of one sub-core module and two second insulation boards of the battery module according to the embodiment of the present invention;
FIG. 8 is an enlarged view of area A of FIG. 7;
fig. 9 is a perspective view of one stack body of the battery module according to the embodiment of the present invention;
FIG. 10 is an enlarged view of area B of FIG. 9;
fig. 11 is a front view of one stack body of the battery module according to the embodiment of the present invention.
Reference numerals:
100: a battery module;
1: a box module; 11: a top seal plate; 111: a cooling plate; 112: an insulating layer; 113: an explosion-proof film layer; 1131: an explosion-proof valve; 12: a bottom seal plate; 121: a refrigerant inlet; 122: a refrigerant outlet;
13: a left frame; 14: a right frame; 141: a pressure relief plate; 1412: a second pressure relief vent; 1413: fire extinguishing pressure relief flue; 142: an insulating layer;
15: a front end sealing plate; 16: a rear end sealing plate;
2: a cell module; 21: a sub-cell module; 211: stacking the sheets; 212: a stack; 213: a pouch cell; 22: a bus bar;
34: a first heat insulation plate; 35: a bus bar;
3: a sealing module; 31: a second heat insulation plate; 32: an upper seal ring; 33: a lower seal ring; 34: sealing the adhesive layer;
4: a detection module; 41: collecting the slices; 42: detecting a contact;
51: a high-voltage interface; 52: a low voltage interface.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
A battery module 100 according to an embodiment of the present invention is described below with reference to fig. 1 to 11.
As shown in fig. 1 to 11, the battery module 100 includes a case module 1, a cell module 2, and a sealing module. Specifically, be formed with the installation cavity in the box module 1, box module 1 includes top sealing plate 11, is equipped with a plurality of explosion-proof valves 1131 on the top sealing plate 11, and from this, the high temperature high pressure gas that produces after installing the electric core module 2 inefficacy in the installation cavity can burst explosion-proof valve 1131 and discharge to the battery module 100 outside to prevent that battery module 100 from exploding.
Further, the cell module 2 comprises a plurality of sub-electric core modules 21, each sub-electric core module 21 comprises at least two soft package batteries 213, at least two soft package batteries 213 are suitable for being stacked along a first direction, where the first direction refers to a front-back direction as shown in fig. 1, a first heat insulation board 34 is arranged between two adjacent soft package batteries 213, and the soft package batteries 213 and the first heat insulation board 34 are suitable for being bonded through a sealant, so that through the cooperation of the first heat insulation board 34 and the sealant, not only the two adjacent soft package batteries 213 can be stacked along the first direction, but also the two soft package batteries 213 can be separated, and it can be understood that when one of the two adjacent soft package batteries 213 fails, the other soft package battery 213 is not easily damaged. It should be noted here that the first heat insulating plate 34 may be made of an insulating and heat insulating material, and not only can prevent a short circuit between two adjacent pouch batteries 213, but also can reduce heat exchange between the pouch batteries 213.
The sealing module comprises a second heat insulation plate 31, the second heat insulation plate 31 is suitable for separating the installation cavity into a plurality of sub-installation cavities, each sub-installation cavity corresponds to at least one explosion-proof valve 1131, each sub-installation cavity is suitable for being sealed through sealing glue after being communicated with the corresponding explosion-proof valve 1131, and at least one sub-electric core module 21 is suitable for being installed in each sub-installation cavity.
In one example as shown in fig. 1, 7 and 8, the length of the second thermal insulation board 31 is greater than the length of the first thermal insulation board 34 in the left-right direction, the length of the first thermal insulation board 34 is substantially equal to the length of the cell module 2, and further, after the sub-cell modules 21 are correspondingly installed in the sub-installation cavities, since each sub-installation cavity corresponds to at least one explosion-proof valve 1131, high-temperature and high-pressure gas generated after one or more cells in the sub-cell modules 21 fail can be discharged from the explosion-proof valve 1131.
Further, in order to prevent the high-temperature high-pressure gas generated by the failed sub-cell module 21 from affecting the neighboring sub-cell module 21, each sub-installation cavity and the corresponding explosion-proof valve 1131 can be sealed by sealant, therefore, under the action of the sealant, an independent pressure relief cavity with good sealing performance can be formed between each sub-installation cavity and the explosion-proof valve 1131, the high-temperature high-pressure gas generated after the failure of the sub-cell module 21 in the pressure relief cavity can only be discharged from the corresponding explosion-proof valve 1131, and the damage to the sub-cell module 21 in the neighboring sub-installation cavity or the neighboring explosion-proof valve 1131 cannot be caused.
According to the battery module 100 of the embodiment of the invention, the first heat insulation plate 34 is arranged between the two adjacent soft package batteries 213, and the first heat insulation plate 34 and the soft package batteries 213 are sealed by the sealant, so that each soft package battery 213 of each sub-battery cell module 21 can be independently arranged in the sub-installation cavity, even if one soft package battery 213 is damaged, the adjacent soft package batteries 213 can be less affected, further, the second heat insulation plate 31 is arranged between the two adjacent sub-battery cell modules 21, and the length of the second heat insulation plate 31 is greater than that of the sub-battery cell module 21, under the action of the sealant, an independent pressure relief cavity with good sealing performance can be constructed between each sub-installation cavity and the explosion-proof valve 1131, and high-temperature and high-pressure gas generated after the sub-battery cell module 21 in the cavity fails can only be discharged from the corresponding explosion-proof valve 1131, the damage can not be caused to the sub-battery cell module 21 in the sub-installation cavity that closes to or the explosion-proof valve 1131 that closes to, therefore, the battery module 100 leakproofness of this application embodiment is good, can protect laminate polymer battery 213 in sub-battery cell module 21, explosion-proof valve 1131 and every sub-battery cell module 21 better.
In some examples of the invention, the first insulation board 34 and the second insulation board 31 can be made of low thermal conductivity material, the thermal conductivity is less than 0.05W/m.k, and the material has certain pressure resistance, the pressure is less than or equal to 0.2MPa, and the deformation is less than 10%; the first heat insulation plate 34 and the second heat insulation plate 31 are adhered to the surface of the soft package battery 213 by sealant; the bonding strength of the structural adhesive is greater than 0.2 MPa; the heat insulation board is made of insulating materials and has good insulating property. The middle parts of the first heat insulation plate 34 and the second heat insulation plate 31 are provided with small holes which are directly between 1mm and 20mm, the total area is not more than 70 percent of the area of the heat insulation plates, and the heat insulation capacity of the first heat insulation plate 34 and the second heat insulation plate 31 is further improved through the structural form.
In some embodiments of the invention, the sub-cell module 21 includes at least one stack body 211, the plurality of soft-package batteries 213 and the plurality of first thermal insulation boards 34 are bonded by an insulating adhesive to form a stack body 212, and the plurality of stack bodies 212 are suitable for being welded in series along a second direction to form the stack body 211, wherein the first direction and the second direction are perpendicular to each other, and the second direction can refer to a left-right direction as shown in fig. 1. When the stacking body 211 is provided with a plurality of stacking bodies 211, the stacking bodies 211 are suitable for being stacked along a first direction, a first heat insulation board 34 is adhered between two adjacent stacking bodies 211 through an insulation glue, and two ends of two adjacent stacking bodies 211 are respectively connected in parallel through a bus bar 35.
In a specific example as shown in fig. 7 to 10, three soft packages 213 may be stacked in a first direction, the positive and negative electrodes are the same when stacked, a first heat insulation plate 34 is bonded between two adjacent soft packages 213, so that the three soft packages 213 and two first heat insulation plates 34 are stacked and bonded in a staggered manner in the first direction to form a stack 212, the stack 212 may be uniformly spaced apart in a second direction, as shown in fig. 9, the three stacks 212 are uniformly spaced apart in the second direction, and after three tabs at one end of each stack 212 are connected in parallel, the three tabs are welded to three tabs of an adjacent stack 212 after being connected in parallel, in other words, the tabs of each stack 212 are connected in parallel first, and then the two adjacent stacks 212 are connected in series, so that not only the soft packages 213 can be connected in series and parallel better to reduce the difficulty of series and parallel connection of the battery module 100, each pouch cell 213 can also be well protected from the circuit. Meanwhile, it should be noted that each battery module 100 is composed of a plurality of sub-battery modules 100 stacked along the first direction, and by the above-mentioned series-parallel connection manner of the sub-battery modules 100, each sub-battery module 100 can be independently used, and each sub-battery module 100 can be flexibly connected in series or in parallel, in this example, two stack pieces 211 are stacked along the first direction in each sub-installation cavity, and two ends of the two stack pieces 211 can be connected in series or in parallel to form one sub-battery module 21.
What need to explain, battery module among the prior art sets up to the battery module of less unit usually, electric core or laminate polymer battery's in the battery module quantity is less promptly, then satisfy through assembling a plurality of battery modules to electric automobile's basic power consumption, however, the battery module storage electric quantity of little unit is less, and, the assembling process of a plurality of battery modules is comparatively complicated, and the series-parallel connection of battery is more loaded down with trivial details, not only influence the pressure release of battery module easily, still increase easily between the battery module, and the influence between electric core or the laminate polymer battery in every battery module.
And the battery module 100 of this application, through being provided with a plurality of mutually independent sub-electric core modules 21, on this basis, seal through the sub-installation cavity to installing sub-electric core module 21, so that every sub-electric core module 21 has independent pressure release chamber, thereby can not lead to the fact the damage to adjacent sub-electric core module 21, and, can also carry out better series connection or parallelly connected between the sub-electric core module 21 that piles up along the first direction, therefore, can design the battery module 100 who satisfies whole car power consumption according to the power consumption of whole car, this battery module 100 can the direct mount on whole car, thereby reduce the installation degree of difficulty and the circuit connection degree of difficulty of installing battery module 100 among a plurality of prior art on the whole.
More specifically, at present, an electric vehicle is formed by grouping a plurality of small modules, each small module is 3 strings/4 strings/6 strings, and the maximum string does not exceed 50 strings, but the electric vehicle often needs more than 80 strings, and the optimal string is often 96 strings to 108 strings, so that the maximum efficiency of a motor can be exerted. One set of electric motor car battery system needs be according to whole car series-parallel connection requirement, a lot of little modules, and other spare parts, assemble the battery box, it is troublesome that the equipment of battery system spare part is many, battery box protection battery module is mechanical simultaneously, safety on the sealing, and increase explosion-proof pressure release part on the battery box, ensure that battery system can be directional when the pressure release, safety release, but there is a battery to release, high-temperature gas is when explosion-proof valve, can disturb other batteries, lead to other electric cores to catch fire and take place thermal runaway.
In order to solve the above problems, the battery module 100 of the present application may include all the batteries and connection accessories required for a whole vehicle, a thermal management system (refer to a cooling module hereinafter), and an explosion-proof pressure relief system (i.e., a pressure relief cavity and an explosion-proof valve 1131 in the present application); the battery pack has the advantages of few assembling parts, high integration level, reduction of the cost of a battery system, heat insulation measures of a single battery cell and an explosion-proof valve 1131 pressure relief structure, and improvement of the use safety of the battery pack. Meanwhile, the battery pack adopts a sealing and high-strength frame structure design, a frame and a sealing design, so that a box body and box cover structure of the original battery system is replaced, and the battery pack can be independently arranged on a whole vehicle and is controlled by taking the whole vehicle as a control system when in use; after the device is matched with an independent control system, the device can be assembled on the whole vehicle flexibly in trial and assembly modes with lowest cost and high efficiency.
As shown in fig. 5, the structure of the case module 1 is specifically as follows: the box module 1 includes top sealing plate 11, bottom sealing plate 12, front end sealing plate 15, rear end sealing plate 16, left side frame 13 and right side frame 14, top sealing plate 11, bottom sealing plate 12, front end sealing plate 15, rear end sealing plate 16, left side frame 13 and right side frame 14 can bond at six sides of electric core module 2 through sealing glue, therefore, can assemble according to electric core module 2's size betterly, wherein, front end sealing plate 15, rear end sealing plate 16, left side frame 13 and right side frame 14 can constitute by the metal material, can adopt the casting, forge, machine tooling, multiple form shaping such as 3D prints.
Further, the top sealing plate 11, the bottom sealing plate 12, the front end sealing plate 15, the rear end sealing plate 16, the left side frame 13 and the right side frame 14 are suitable for welding between two pairs to form the sealed box module 1, and the connection strength of the box module 1 can be ensured, further, the top sealing plate 11, the bottom sealing plate 12, the front end sealing plate 15, the rear end sealing plate 16, the left side frame 13 and the right side frame 14 can be connected between two pairs in other manners, such as riveting, screw connection and other mechanical connection manners, and the present disclosure is not limited herein.
Further, both the top sealing plate 11 and the bottom sealing plate 12 may be insulated and sealed from the cell module 2 by an insulating film.
In the example shown in fig. 1, 4, and 7, the stack body 211 is stacked in the front-rear direction, and therefore, the front end sealing plate 15 and the rear end sealing plate 16 are respectively located at two sides of the stack body 211 in the stacking direction, and in order to further protect the cell module 2, a second insulating plate 31 may be bonded between the front end sealing plate 15 and the rear end sealing plate 16 by using a sealant.
For the welding of the tabs and the welding of the box module 1, which are referred to in the present application, laser welding, ultrasonic welding, riveting, etc. may be adopted, and in some examples, for the parallel welding between the soft packs 213 and the welding between the stacked bodies 212, it is not necessary to adopt the strap connection, that is, the welding between the tabs is directly performed, in other examples, for the parallel welding between the soft packs 213, the welding between the stacked bodies 212 and the welding between the soft packs 213 and the welding between the stacked bodies 212, it is possible to adopt the welding method of the bus bar 35 for the parallel welding between the soft packs 213 and the welding between the stacked bodies 212.
In some embodiments of the invention, the sealing module further comprises a glue seal comprised of a fire retardant glue and/or a non-combustible foam glue, the glue seal being adapted to be poured into the welding region of the stack 212, the glue seal being adapted to cooperate with the first heat shield 34 to divide a plurality of pressure relief chambers within each sub-mounting chamber, the plurality of pressure relief chambers being adapted to correspond to the at least one explosion-proof valve 1131. That is, after the stacks 212 are connected in series in the second direction, a sealant may be filled in the welding region to seal each stack 212, and the sealed stack 212 may correspond to an independent explosion-proof valve 1131, so that when one of the stacks 212 in the same sub-installation cavity fails to generate high-temperature and high-pressure gas, the adjacent stack 212 is not affected or damaged.
In some embodiments of the present invention, the case module 1 further includes a bottom sealing plate 12, and the battery module 100 further includes a cooling module including a first heat exchange system and a second heat exchange system respectively formed in the top sealing plate 11 and the bottom sealing plate 12, and the first heat exchange system and the second heat exchange system are adapted to cool or heat the cell module 2 from the bottom and the top of the cell module 2.
In some examples, when the battery cell module 2 operates, the temperature is too high, so that a safety risk is easily generated, and at this time, the bottom or the top of the battery cell can be refrigerated through the first heat exchange system or the second heat exchange system, so as to reduce the temperature of the battery cell module 2, thereby ensuring that the battery cell module 2 is at a better operating temperature.
In other examples, such as in cold weather, the operation efficiency of the cell module 2 is low, and at this time, the bottom or the top of the cell may be heated by the first heat exchange system or the second heat exchange system, so as to ensure that the cell module 2 is at a better operation temperature.
In some examples, for example, in a cold weather, it is not easy to charge the battery cell module 2, and at this time, the bottom or the top of the battery cell may be heated by the first heat exchange system or the second heat exchange system, so as to better charge the battery cell module 2.
For the first heat exchange system and the second heat exchange system, in a specific example, the first heat exchange system and the second heat exchange system may both have cooling pipelines capable of injecting a refrigerant, the cooling pipelines are uniformly disposed on the top sealing plate 11 and the bottom sealing plate 12, and the cooling pipelines of the first heat exchange system and the second heat exchange system may be communicated with each other, and thus, have the same refrigerant inlet 121 and the same refrigerant outlet 122.
For the first heat exchange system and the second heat exchange system, through the cooperation of the first heat exchange system and the second heat exchange system, and the sealant layer 34 formed by the sealant between the top sealing plate 11 and the battery cell module 2 and between the bottom sealing plate 12 and the battery cell module 2, it is possible to prevent external water and gas from entering the battery module 100.
In order to further improve the cooling or heating effect of the first heat exchange system and the second heat exchange system on the cell module 2, heat conducting glue is suitable to be filled between the cell module 2 and the top sealing plate 11, and between the cell module 2 and the bottom sealing plate 12, which on one hand can improve the heat transfer efficiency, and on the other hand can bond the top sealing plate 11 and the bottom sealing plate 12 to the top and the bottom of the cell module 2, respectively, and meanwhile, the upper end and the lower end of the cell module 2 can be sealed by the heat conducting glue filled between the cell module 2 and the top sealing plate 11, and the heat conducting glue filled between the cell module 2 and the bottom sealing plate 12, such as the top of the cell module 2, when the heat conducting glue is filled between the cell module 2 and the top sealing plate 11, the position of the explosion-proof valve 1131 of the top sealing plate 11 needs to be avoided, so as to ensure the smoothness, and the filled heat conducting glue can be matched with the second heat insulating plate 31 at this time, so that two adjacent sub-installation cavities are isolated and sealed between the top of the cell module 2 and the top sealing plate 11 and between the bottom of the cell module 2 and the bottom sealing plate 12.
Preferably, the heat-conducting glue can be in a liquid state and is injected onto the insulating film of the cooling plate 111 through machine equipment, the heat-conducting coefficient of the heat-conducting glue is preferably more than or equal to 0.5W/m.k, and the heat-conducting glue has certain structural bonding strength which is more than 0.2 MPa; the heat-conducting structural adhesive also has a sealing form between the battery cell and the heat management system, so that water and gas are prevented from entering the battery pack.
In an embodiment of the present invention, the top sealing plate 11 includes a cooling plate 111, an insulating layer and an explosion-proof film layer 113, the first heat exchanging system is formed as a cooling pipeline uniformly distributed on the cooling plate 111, the cooling plate 111 is formed with a plurality of explosion-proof holes, the explosion-proof holes and the cooling pipeline are arranged in a staggered manner, the insulating layer includes an insulating film, the insulating film is disposed on a side surface of the cooling plate 111 facing the cell modules 2, the explosion-proof film layer 113 includes a plurality of explosion-proof films, and the plurality of explosion-proof films and the explosion-proof holes are arranged in a one-to-one correspondence, so that when a sub-cell module 21 in a certain sub-mounting cavity fails to generate high-temperature and high-pressure gas, even flame, the insulating layer can be melted at high temperature, and then the high-temperature and high-pressure gas or flame can be exhausted through the explosion-proof film layer 113, at this time, the adjacent sub-cell, so that the adjacent sub-cell modules 21 can be better protected.
In some embodiments of the invention, as shown in fig. 1 and 5, the case module 1 further comprises: left side frame 13 and right frame 14, left side frame 13 and right frame 14 are suitable for respectively through the structural adhesive bonding in the left and right sides of electricity core module 2, and left side frame 13 and right frame 14 all include: pressure release board 141 and insulating layer 142, be formed with the pressure release flue 1413 of putting out a fire that extends along the first direction in the pressure release board 141, pressure release board 141 is equipped with first pressure release hole towards one side of electric core module 2, first pressure release hole is equipped with a plurality ofly, a plurality of first pressure release holes and a plurality of sub-installation cavity one-to-one, the high temperature high-pressure gas or the flame of stacking body 211 release are suitable for getting into pressure release flue 1413 of putting out a fire from first pressure release hole, insulating layer 142 includes the insulating film, left frame 13 and one side of right frame 14 towards electric core module 2 are located respectively to the insulating film.
That is to say, when a certain sub-cell module 21 fails and high-temperature high-pressure gas or flame in the sub-cell module 21 is released from the end of the sub-cell module 21, the high-temperature high-pressure gas or flame melts the insulating layer 142 first, and then enters the fire extinguishing pressure relief flue 1413 through the first pressure relief hole, as shown in fig. 1, the fire extinguishing pressure relief flue 1413 extends in the front-rear direction, the fire extinguishing pressure relief flue 1413 of one pressure relief plate 141 may be opposite to the plurality of sub-installation cavities, and the high-temperature high-pressure gas or flame entering the fire extinguishing pressure relief flue 1413 may flow along the fire extinguishing pressure relief flue 1413 to perform the processing of pressure relief and open fire.
In some optional examples, the pressure release plate 141 may be provided in plurality, and the fire extinguishing pressure release flues 1413 in each pressure release plate 141 may be independent of each other or may be communicated with each other, so that the production cost of the pressure release plate 141 may be reduced to some extent, and the structural strength of each pressure release plate 141 may be ensured.
In some optional examples, a plurality of fire suppression pressure relief flues 1413 may be provided in the up-down direction in one pressure relief panel 141.
In some embodiments of the present invention, a second pressure relief hole 412 is formed in a side of the pressure relief plate 141 away from the cell module 2, the second pressure relief hole 412 is provided with a plurality of first pressure relief holes and the plurality of second pressure relief holes 412 are opposite to each other in the first direction, at least one end of the fire extinguishing pressure relief flue 1413 in the second direction is provided with a pressure relief opening, and high-temperature and high-pressure gas or flame entering the fire extinguishing pressure relief flue 1413 is suitable for being released to the outside from the pressure relief opening and the second pressure relief hole 412 after the fire extinguishing treatment of the fire extinguishing pressure relief flue 1413. That is, after the high-temperature and high-pressure gas or the open fire is depressurized or eliminated in the fire extinguishing pressure relief flue 1413, the gas or the smoke may be discharged from the second pressure relief hole 412, and at this time, the second pressure relief hole 412 only discharges the gas or the smoke and does not discharge the flame. Moreover, the first pressure relief hole is opposite to the second pressure relief hole 412, so that the pressure relief efficiency can be ensured.
In an embodiment of the present invention, as shown in fig. 1 to 6, the case module 1 further includes a bottom sealing plate 12, the bottom sealing plate 12 is located at the bottom of the cell module 2, and the sealing module further includes: an upper sealing ring 32 and a lower sealing ring 33, the upper sealing ring 32 covering the top of the first heat shield plate 34 and at least a part of the top opening of the sub-mounting chamber, the upper sealing ring 32 being located at the lower end of the top sealing plate 11, the upper sealing ring 32 being adapted to cooperate with the top sealing plate 11 to seal the top of the sub-mounting chamber, the lower sealing ring 33 covering the bottom of the first heat shield plate 34 and at least a part of the bottom opening of the sub-mounting chamber, the lower sealing ring 33 being located at the upper end of the bottom sealing plate 12, the lower sealing ring 33 being adapted to cooperate with the bottom sealing plate 12 to seal the bottom of the.
That is, in order to ensure the sealing strength between the first heat insulation plate 34 and the top sealing plate 11 and between the first heat insulation plate 34 and the bottom sealing plate 12, an upper sealing ring 32 and a lower sealing ring 33 may be respectively disposed between the first heat insulation plate 34 and the top sealing plate 11 and between the first heat insulation plate 34 and the bottom sealing plate 12, and thus, when high-temperature and high-pressure gas or flame generated in the sub-installation cavity occurs, the upper sealing ring 32 and the lower sealing ring 33 may be pressed first, thereby ensuring the reliability of sealing between the first heat insulation plate 34 and the top sealing plate 11 and between the first heat insulation plate 34 and the bottom sealing plate 12.
In some embodiments of the present invention, as shown in fig. 1-6, the battery module 100 further comprises a detection module 4, the detection module 4 comprises a plurality of collecting sheets 41, each collecting sheet 41 is formed with a plurality of detection contacts 42, and each detection contact is adapted to be connected with at least one of a positive electrode and a negative electrode of each pouch battery 213.
In the example shown in fig. 1 to fig. 6, a collecting sheet 41 is respectively disposed at the left and right ends of the battery cell module 2, a plurality of detection contacts 42 are disposed on the collecting sheet 41 at uniform intervals, and the detection contacts 42 may be connected to the bus bars 35 or the tabs at the two ends of the stack body 211 to collect information of each stack body 211. Further, it is also possible to provide a collecting sheet 41 at both ends of each stack 212, and the collecting sheet 41 may be connected to the bus bars 35 or tabs at both ends of the stack 212 to collect information for each stack 212.
Optionally, the collecting sheet 41 may be made of copper, aluminum, nickel, or the like, the tab of the soft package battery 213 may be divided into an aluminum tab and a copper tab, and the collecting sheet 41 and the aluminum tab and the copper tab may be welded, but may be preferably welded to the copper tab to ensure the reliability of information collection.
Preferably, the collecting plate 41 is a nickel plate with a nickel content of more than 99%, and is preferably welded on the tab or the bus bar 35 by laser, or by argon arc welding, ultrasonic welding, or by bolting, riveting, or the like.
In a specific example, the high voltage interface 51 of the circuit of the cell module 2 and the low voltage interface 52 of the collector may be mounted on at least one of the front end sealing plate 15, the rear end sealing plate 16, the left frame 13 and the right frame 14, which is not limited herein.
In a specific example, the front sealing plate 15, the rear sealing plate 16, the left frame 13 and the right frame 14 may be hollow.
For the explosion-proof valve 1131 mentioned in the present application, it should be noted that the explosion-proof valve 1131 is made of a high temperature resistant and fire resistant material, and will not burn through when the flame temperature is 1000 ℃ within 5min, and can be opened instantly when the bearing pressure reaches 25 kpa; the protective plate is bonded with the protective plate through high-temperature-resistant structural adhesive; the material of the protection plate is preferably mica plate, mica paper or high silica cloth.
Other constructions and operations of the battery module 100 according to the embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.
In the description herein, references to the description of the terms "some embodiments," "optionally," "further," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (10)
1. A battery module, comprising:
the box body module is internally provided with a mounting cavity and comprises a top sealing plate, and a plurality of explosion-proof valves are arranged on the top sealing plate;
the battery cell module is arranged in the installation cavity and comprises a plurality of sub-battery cell modules, each sub-battery cell module comprises at least two soft-packaged batteries, the at least two soft-packaged batteries are suitable for being stacked along a first direction, a first heat insulation plate is arranged between every two adjacent soft-packaged batteries, and the soft-packaged batteries and the first heat insulation plates are suitable for being bonded through sealing glue;
the sealing module comprises a second heat insulation plate, the second heat insulation plate is suitable for separating the installation cavity into a plurality of sub-installation cavities, each sub-installation cavity corresponds to at least one explosion-proof valve, each sub-installation cavity is suitable for being sealed through sealant after being communicated with the corresponding explosion-proof valve, and each sub-installation cavity is suitable for being provided with at least one sub-electric core module.
2. The battery module of claim 1, wherein the sub-cell module comprises:
at least one pile lamellar body, it is a plurality of laminate polymer battery and a plurality of first heat insulating board passes through the insulating cement and bonds and form the pile body, and is a plurality of the pile body is suitable for along the second direction series connection welding and forms the pile body, works as when the pile body is equipped with a plurality of, and is a plurality of the pile body is suitable for to be followed the first direction piles up, the first direction with mutually perpendicular between the second direction, adjacent two it has first heat insulating board, adjacent two to bond through the insulating cement between the pile body the both ends of the pile body are parallelly connected through the busbar respectively.
3. The battery module according to claim 2, wherein the sealing module further comprises:
a glue seal comprised of fire retardant glue and/or non-combustible foam glue, said glue seal adapted to be poured into a weld region of said stack, said glue seal adapted to cooperate with said first heat shield to separate a plurality of pressure relief chambers within each of said sub-mounting cavities, said plurality of pressure relief chambers adapted to correspond to at least one of said explosion vent valves.
4. The battery module according to claim 1, wherein the case module further comprises a bottom sealing plate, the battery module further comprising:
the cooling module comprises a first heat exchange system and a second heat exchange system which are respectively formed in the top sealing plate and the bottom sealing plate, and the first heat exchange system and the second heat exchange system are suitable for refrigerating or heating the battery cell module from the bottom and the top of the battery cell module.
5. The battery module of claim 4, wherein the cell module and the top sealing plate and the cell module and the bottom sealing plate are filled with a thermal conductive adhesive, the thermal conductive adhesive is adapted to bond the top sealing plate and the bottom sealing plate to the top and the bottom of the cell module, and the thermal conductive adhesive is adapted to cooperate with the second thermal insulation plate to seal the two connected sub-mounting cavities at the top and the bottom.
6. The battery module according to claim 4, wherein the top sealing plate comprises:
the first heat exchange system is formed into cooling pipelines which are uniformly distributed on the cooling plate, a plurality of explosion-proof holes are formed in the cooling plate, and the explosion-proof holes and the cooling pipelines are arranged in a staggered mode;
the insulating layer comprises an insulating film, and the insulating film is arranged on the side surface, facing the battery cell module, of the cooling plate;
the explosion-proof membrane layer, the explosion-proof membrane layer includes a plurality of rupture membranes, a plurality of rupture membranes with explosion-proof hole one-to-one sets up.
7. The battery module according to claim 2, wherein the case module further comprises: left side frame and right frame, left side frame with right frame is suitable for respectively to be in through the structural adhesive bonding the left and right sides of electricity core module, left side frame with right frame all includes:
the pressure relief plate is internally provided with a fire extinguishing pressure relief flue extending along a first direction, one side of the pressure relief plate facing the battery cell module is provided with a plurality of first pressure relief holes, the plurality of first pressure relief holes correspond to the plurality of sub-installation cavities one by one, and high-temperature and high-pressure gas or flame released by the stacking body is suitable for entering the fire extinguishing pressure relief flue from the first pressure relief holes;
the insulating layer comprises insulating films, and the insulating films are respectively arranged on the left frame and the right frame and face one side of the battery cell module.
8. The battery module according to claim 7, wherein a second pressure relief hole is formed in one side, away from the cell module, of the pressure relief plate, a plurality of second pressure relief holes are formed, the first pressure relief holes and the second pressure relief holes are aligned in the first direction one by one, at least one end, in the second direction, of the fire extinguishing pressure relief flue is provided with a pressure relief opening, and the high-temperature and high-pressure gas or flame entering the fire extinguishing pressure relief flue is suitable for being released to the outside from the pressure relief opening and the second pressure relief holes after fire extinguishing treatment of the fire extinguishing pressure relief flue.
9. The battery module according to claim 1, wherein the case module further comprises: a bottom sealing plate located at a bottom of the cell module, the sealing module further comprising:
the upper sealing ring covers the top of the first heat insulation plate and at least one part of the opening at the top of the sub-installation cavity, is positioned at the lower end of the top sealing plate, and is suitable for being matched with the top sealing plate to seal the top of the sub-installation cavity;
the lower sealing ring covers the bottom of the first heat insulation plate and at least one part of the opening at the bottom of the sub-installation cavity, is positioned at the upper end of the bottom sealing plate, and is suitable for being matched with the bottom sealing plate to seal the bottom of the sub-installation cavity.
10. The battery module according to claim 1, further comprising:
the detection module comprises a plurality of acquisition pieces, a plurality of detection contacts are formed on each acquisition piece, and each detection contact is suitable for being connected with at least one of the positive pole and the negative pole of each soft package battery.
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| CN202010575251.8A CN111584978A (en) | 2020-06-22 | 2020-06-22 | Battery module |
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| CN202010575251.8A CN111584978A (en) | 2020-06-22 | 2020-06-22 | Battery module |
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| CN114335914A (en) * | 2021-12-17 | 2022-04-12 | 中国电子科技集团公司第十八研究所 | Full-series soft package battery module and forming process |
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| CN115275501A (en) * | 2022-08-19 | 2022-11-01 | 东风汽车集团股份有限公司 | Explosion-proof electricity core module |
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