CN111900283A - Battery shell, battery module and assembling method of battery module - Google Patents
Battery shell, battery module and assembling method of battery module Download PDFInfo
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- CN111900283A CN111900283A CN202010554863.9A CN202010554863A CN111900283A CN 111900283 A CN111900283 A CN 111900283A CN 202010554863 A CN202010554863 A CN 202010554863A CN 111900283 A CN111900283 A CN 111900283A
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- 230000000712 assembly Effects 0.000 claims description 31
- 238000000429 assembly Methods 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 23
- 238000009434 installation Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 230000001788 irregular Effects 0.000 abstract description 4
- 230000006978 adaptation Effects 0.000 abstract description 2
- 210000004027 cell Anatomy 0.000 description 24
- 239000010949 copper Substances 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 210000005056 cell body Anatomy 0.000 description 5
- 239000000306 component Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000000565 sealant Substances 0.000 description 3
- 239000004411 aluminium Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention provides a battery shell, a battery module and an assembling method of the battery module; the battery shell comprises a bottom shell and a cover plate, wherein a containing part for containing the battery assembly is arranged on the bottom shell, and an opening matched with the cover plate is formed in the containing part; the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are detachably connected, and the first cover plate and the second cover plate are not positioned on the same plane when connected; through set up two openings with apron looks adaptation on the drain pan to make follow-up battery pack's assembly more convenient, and avoided leading to the phenomenon of unable assembly because of battery pack's thickness is irregular.
Description
Technical Field
The invention relates to the technical field of battery processing, in particular to a battery shell, a battery module and an assembling method of the battery module.
Background
With the increasing environmental demands and energy pressure, batteries are widely used in more and more fields. Currently, in a relatively large-sized device (e.g., an electric vehicle), due to the characteristics of high output and high capacity, a plurality of batteries (e.g., pouch batteries or lithium iron batteries) are connected to form a battery module for the large-sized device. Therefore, it is necessary to provide a battery case capable of accommodating a plurality of batteries. At present, most of battery shells are unidirectional openings, when the batteries are assembled on the corresponding battery shells, the assembly process is relatively complex, and the loose or non-adaptive assembly phenomenon of the batteries after the assembly is finished is caused frequently because the sizes of different batteries are difficult to control.
Disclosure of Invention
The invention aims to provide a battery shell, a battery module and an assembling method of the battery module, which are used for solving the problem of inconvenient battery assembly.
In order to solve the above problems, the present invention provides a battery casing, which includes a bottom casing and a cover plate, wherein the bottom casing is provided with a receiving portion for receiving a battery assembly, and the receiving portion is provided with an opening adapted to the cover plate; the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are detachably connected, and the first cover plate and the second cover plate are not located on the same plane when connected.
Further, the first cover plate and the second cover plate are perpendicular to each other when connected.
Further, the drain pan includes bottom plate, two relative lateral wall boards and the back shroud that sets up, fixed connection between bottom plate, two lateral wall boards with the back shroud.
The invention also provides a battery module, which comprises a battery component and the battery shell, wherein the battery component is arranged in the accommodating part of the battery shell.
Further, battery pack includes a plurality of electric core subassemblies and with each female arranging that electric core subassembly's utmost point ear is connected, female arranging is equipped with external connecting piece, first apron or be equipped with on the second apron with the corresponding breach of external connecting piece.
Furthermore, the battery core assembly comprises a battery core body and a battery core lug support, and the battery core lug support is arranged at the lug extending end of the battery core body; each battery element assembly passes through the installation is piled up in proper order to electric core utmost point ear support.
Furthermore, at least one group of first connecting parts is arranged on one surface of the battery cell lug support, and at least one group of second connecting parts is arranged on the other surface of the battery cell lug support; the first connecting portion comprises a first protruding structure and a first concave structure, and the second connecting portion comprises a second concave structure corresponding to and matched with the first protruding structure of the first connecting portion and a second protruding structure corresponding to and matched with the first concave structure of the first connecting portion.
Furthermore, a third concave structure is arranged at the bottom of the accommodating part, and the third concave structure is matched with the first convex structure or the second convex structure.
The invention also provides an assembly method of the battery module, which comprises the following steps:
sequentially stacking and installing each electric core assembly in a containing part of a bottom shell, wherein an opening is formed in the bottom shell;
electrically connecting the electric core assembly mounted in the accommodating part of the bottom case through a bus bar;
glue is poured into the electric core assembly to fix the electric core assembly in the accommodating part of the bottom shell;
and mounting the cover plate on the opening of the bottom shell to form a cavity with relative sealing.
Further, each of the electric core assemblies is sequentially stacked and mounted in the accommodating portion of the bottom case, including:
with each electricity core subassembly sets up side by side, each electricity core subassembly includes first connecting portion and second connecting portion:
the two adjacent electric core assemblies are connected through the first connecting part of one electric core assembly and the second connecting part of the other electric core assembly;
or,
between two adjacent electricity core subassemblies, through one the first connecting portion of electricity core subassembly and another the first connecting portion of electricity core subassembly are connected, perhaps through one the second connecting portion of electricity core subassembly and another the second connecting portion of electricity core subassembly are connected.
The battery shell provided by the invention has the beneficial effects that: the bottom shell is provided with a containing part for containing the battery assembly, and the containing part is provided with an opening matched with the cover plate; the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are detachably connected, and the first cover plate and the second cover plate are not positioned on the same plane when connected; the battery shell is simple in overall design, and the two openings matched with the cover plate are formed in the bottom shell, so that the assembly of a subsequent battery assembly is more convenient, and the phenomenon that the assembly cannot be carried out due to the fact that the thickness of the battery assembly is irregular is avoided.
The battery module provided by the invention has the beneficial effects that: including battery case and battery pack, battery pack locates in battery case's the holding portion of battery case, and battery module assembling process is simple and easy convenient.
The method for assembling the battery module has the advantages that: sequentially stacking and installing each electric core assembly in a containing part of a bottom shell, wherein an opening is formed in the bottom shell; electrically connecting the electric core assembly mounted in the accommodating part of the bottom case through a bus bar; glue is poured on the electric core assembly to fix the electric core assembly inside the bottom shell; mounting the cover plate on the opening of the bottom shell to form a cavity with relative sealing; thereby avoided assembling the in-process of battery pack to battery case holding portion, the phenomenon that the battery is loose or unable adaptation equipment appears, improved the convenience of battery module equipment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of a battery case according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a battery module according to an embodiment of the invention;
fig. 3 is a schematic structural diagram of a battery assembly according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of an electrical core assembly provided in an embodiment of the present invention;
fig. 5 is a flowchart of an assembly method of a battery module according to an embodiment of the invention.
Wherein, in the figures, the respective reference numerals:
10-a bottom shell; 20-cover plate; 101-a locus of containment; 201-a first cover plate; 202-a second cover plate; 100-a battery case; 30-a battery assembly; 301-an electrical core assembly; 302-bus bar; 3021-external connection; 30211-a connector; 30212-copper bar lead-outs; 3011-a cell body; 3012-cell tab holder; 30121-a first connection; 30122-a second connecting portion.
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1, an embodiment of the invention provides a battery housing, which includes a bottom case 10 and a cover plate 20, where the bottom case 10 is provided with a receiving portion 101 for receiving a battery assembly, and the receiving portion 101 is provided with an opening adapted to the cover plate 10. It is understood that the openings of the cover plate 20 and the accommodating portion 101 are the same in size, the bottom case 10 is fixedly connected to the cover plate 20, and the bottom case 10 and the cover plate 20 can cooperate to form a battery housing with a relative seal. Alternatively, the bottom case 10 and the cover plate 20 may be fixedly connected by screws or fixing pins. Alternatively, the battery case may have a square, rectangular, prismatic shape, or the like.
The cover plate 20 comprises a first cover plate 201 and a second cover plate 202, the first cover plate 201 and the second cover plate 202 are detachably connected, the first cover plate 201 and the second cover plate 202 are not located on the same plane when connected, the cover plate is simple in design, and the first cover plate 201 and the second cover plate 202 are convenient to assemble and disassemble. It is understood that the first cover plate 201 and the second cover plate 202 are cover plates corresponding to any two surfaces of the battery case, and the any two surfaces are not on the same horizontal plane. It is understood that the first cover plate 201 and the second cover plate 202 are cover plates corresponding to any two adjacent surfaces in the battery case. For example: the first cover plate 201 and the second cover plate 202 may be an upper cover plate and a side cover plate, or a lower cover plate and a side cover plate.
In this embodiment, a container 101 for accommodating the battery assembly is disposed on the bottom case 10, and the container 101 has an opening adapted to the cover plate 20; the cover plate 20 comprises a first cover plate 201 and a second cover plate 202, the first cover plate 201 and the second cover plate 202 are detachably connected, and the first cover plate 201 and the second cover plate 202 are not in the same plane when connected; two openings matched with the cover plate 20 are formed in the bottom shell 10, so that the assembly of a subsequent battery assembly is more convenient, and the phenomenon that the assembly cannot be carried out due to the fact that the thickness of the battery assembly is irregular is avoided.
Further, referring to fig. 1, the first cover plate 201 and the second cover plate 202 are perpendicular to each other when they are coupled.
It is understood that the connection angle between the first cover plate 201 and the second cover plate 202 is 90 degrees, that is, the bottom case 10 and the first cover plate 201 and the second cover plate 202 cooperate to form a battery case in the shape of a cube or a cuboid; the battery shell is simple in overall design, a plurality of battery components can be conveniently assembled in the accommodating part of the battery shell in the follow-up process, and the production and manufacturing cost can be reduced.
Further, the drain pan includes bottom plate, two relative lateral wall boards and the back shroud that sets up, fixed connection between bottom plate, two lateral wall boards with the back shroud.
In one embodiment, the bottom plate, the two side wall plates and the rear cover plate are fixedly connected in advance through screws to form a bottom case, so that the subsequent assembly of the battery case is facilitated. Preferably, the bottom plate, the two side wall plates, and the rear cover plate are perpendicular to each other when connected, so as to provide a more convenient accommodation part for assembly of the battery assembly.
The present invention also provides a battery module, referring to fig. 2 and 3, including a battery assembly 30 and the battery housing 100, wherein the battery assembly 30 is disposed in the accommodating portion 101 of the battery housing 100. Preferably, the battery assembly 30 is a soft pack battery assembly,
in an embodiment, the battery assembly 30 is first assembled into the accommodating portion of the battery housing 100, and then the corresponding first cover plate 201 and the second cover plate 202 are covered to form a complete battery module, which is then provided to an electronic device or an electric vehicle for use.
In the present embodiment, since the battery assembly 30 and the battery case 100 are separately prepared independently, and the size and shape of the battery case 100 can be adjusted according to the thickness and shape of the battery assembly 30; when the battery module is assembled, the battery assembly 30 is assembled into the receiving part of the corresponding battery case 100, and the assembly process is simple and convenient.
Additionally, since the battery assembly 30 is a soft package battery assembly, and the battery case 100 is a case provided with two openings; therefore, it is also possible to avoid a phenomenon in which the battery assembly 30 cannot be assembled due to irregularities in the thickness of the battery assembly when the battery assembly is assembled into the battery case 100.
Further, referring to fig. 2 and 3, the battery assembly 30 includes a plurality of electric core assemblies 301 and a bus bar 302 connected to a tab of each of the electric core assemblies 301. Preferably, the busbar 302 is an integrated busbar.
In one embodiment, the battery assembly 30 is composed of a plurality of cell assemblies 301 and a busbar 302. Specifically, each of the electric core assemblies 301 is arranged in parallel/series, and then the busbar 302 is connected to the tab of each of the electric core assemblies, so that the electric cores in each of the electric core assemblies 301 are connected in parallel/series to form a circuit. Additionally, after each of the cell assemblies 301 are arranged in parallel/series, an aluminum bar may be directly connected to a tab of each of the cell assemblies 301, so that the cells in each of the cell assemblies 301 are connected in parallel/series to form a circuit.
An external connecting piece 3021 is disposed on the busbar 302, and a notch corresponding to the external connecting piece 3021 is disposed on the first cover plate 201 or the second cover plate 202. The external connection member 3021 refers to an interface for connecting the battery pack with an external device. In this embodiment, the external connector 3021 includes one connector 30211 and two copper bar leadouts 30212. The connector 30211 and the two copper bar lead-outs 30212 are arranged on the same side of the busbar 302. The connector 30211 is disposed between the two copper bar leading-out pieces 30212.
In an embodiment, the connector 30211 is disposed on the FPC collecting flexible board of the bus bar 302, since the FPC collecting flexible board of the bus bar 302 is flexible. Therefore, the connector 30211 not only serves as an interface for connecting the battery assembly 30 to an external device, but also can further compress and protect the FPC collection sheet. In this embodiment, the connector 30211 is connected to the first cover plate 201 or the second cover plate 202 in a corresponding manner, so that the connector 30211 is prevented from shaking.
In an embodiment, two of the copper bar leadouts 30212 are disposed on the same side of the bus bar 302. It is understood that the two copper bar leadouts 30212 correspond to the positive/negative electrodes of the entire battery module. Specifically, the positive electrode/negative electrode of the battery module is insulated by the plastic part of the busbar to form the copper bar leading-out part 30212, and the copper bar leading-out part 30212 extends out of the corresponding notch on the first cover plate or the second cover plate, so as to facilitate the connection between the battery module 30 and the battery module 30, or between the battery module 30 and other devices.
Further, referring to fig. 4, the core assembly 301 includes a core body 3011 and a core tab support 3012, where the core tab support 3012 is installed at a tab extending end of the core body 3011; each battery core assembly 301 is installed by stacking the battery core tab supports 3012 in sequence. Each battery element assembly 301 passes through battery core utmost point ear support can realize all around the chucking of fixing a position from top to bottom.
Specifically, electric core utmost point ear support 3012 is including the support portion, be equipped with support piece on the support portion, electric core utmost point ear support 3012 install through support piece electric core body 3011's utmost point ear stretches out the end. In a specific embodiment, the supporting member is an aluminum bar having a U-shaped cross section, and the aluminum bar is clamped on the supporting portion to support the tab of the cell body 3011, so that the cell tab support 3012 and the cell body 3011 are welded more tightly.
In one embodiment, each of the core assemblies 301 is sequentially stacked and mounted by the cell tab support 3012 mounted on the cell body 3011. Specifically, each cell assembly 301 may be mounted in series or in parallel by the cell tab support 3012. It should be noted that, in an embodiment, in order to improve the installation efficiency of the subsequent battery assembly, the cell tab support 3012 may be automatically installed on the cell body 3011 by an industrial robot or a robot in advance, so as to directly obtain the battery assembly 301. In this embodiment, the battery core assembly 301 includes a battery core body 3011 and a battery core tab support 3012, where the battery core tab support 3012 is installed at a tab extending end of the battery core body 3011; each electricity core subassembly 301 passes through electricity core utmost point ear support 3012 piles up the installation in proper order, through electricity core utmost point ear support 3012 can realize each series connection or parallel connection between the electricity core subassembly 301 have thereby improved the flexibility of connecting between the electricity core subassembly 301.
Further, referring to fig. 4, at least one group of first connection portions 30121 is disposed on one surface of the battery cell tab support 3012, and at least one group of second connection portions 30122 is disposed on the other surface of the battery cell tab support; the first connection portions 30121 include first protruding structures and first concave structures, and the second connection portions 30122 include second concave structures corresponding to and fitting the first protruding structures of the first connection portions 30121 and second protruding structures corresponding to and fitting the first concave structures of the first connection portions 30121.
Specifically, the first connection portion 30121 and the second connection portion 30122 correspond to each other in position on two side surfaces of the battery tab support 3012. The size and the shape of the first convex structure are matched with those of the second concave structure; the size and the shape of the first concave structure are matched with those of the second convex structure. Understandably, the first connecting part and the second connecting part are connected in a clamping manner through the first protruding structure and the corresponding second concave structure and the first concave structure and the corresponding second protruding structure, so that series connection and parallel connection can be realized between each core assembly 301, and the assembling process is simple and convenient.
In one embodiment, the components of each electrical core assembly 301 have the same specification, and when the electrical core assemblies 301 are stacked in the forward direction, two adjacent electrical core assemblies 301 can be connected by the first connection portion 30121 of one electrical core assembly 301 and the second connection portion 30122 of another electrical core assembly 30121, so as to realize parallel connection of two adjacent electrical core assemblies 301. When the electrical core assemblies 301 are stacked in opposite directions, two adjacent electrical core assemblies 301 can be connected by the first connection portion 30121 of one electrical core assembly 301 and the first connection portion 30121 of another electrical core assembly 301, or by the second connection portion 30122 of one electrical core assembly 301 and the second connection portion 30122 of another electrical core assembly 301, so as to realize series connection of two adjacent electrical core assemblies 301.
Further, a third concave structure is arranged at the bottom of the accommodating portion 101, and the third concave structure is matched with the first convex structure or the second convex structure.
As can be understood, since the electric core assembly 301 is directly placed in the accommodating portion 101, in order to ensure a stable installation between the electric core assembly 301 and the accommodating portion 101, the third concave structure is provided at the bottom of the accommodating portion 101, and the first protruding structure or the second protruding structure on the electric core assembly 301 at the bottom layer is snapped into the third concave structure, so that the electric core assembly 301 is fixed front, back, left and right. Additionally, a fool-proof structure is further arranged in the third concave structure and used for preventing the electric core assembly 301 from being subjected to data errors caused by reverse installation of the front side and the back side.
In this embodiment, a third concave structure is disposed at the bottom of the accommodating portion 101, and the third concave structure is adapted to the first convex structure or the second convex structure; thereby ensuring accurate installation of the electrical core assembly 301.
The invention also provides an assembling method of the battery module. Specifically, the assembling method of the battery module can be realized automatically by mechanical equipment or manually. The machine equipment includes, but is not limited to, an industrial robot, a manipulator, an assembling machine or other automation equipment, etc.
Referring to fig. 5, in the present embodiment, the method for assembling a battery module includes the steps of:
s10: and each electric core component is sequentially stacked and arranged in the accommodating part of the bottom shell, and the bottom shell is provided with an opening.
Specifically, acquire the electricity core subassembly of predetermineeing quantity and be equipped with the open-ended drain pan, stack each electricity core subassembly in proper order through series connection or parallelly connected mode and install the holding portion at the drain pan. Alternatively, the electric core assemblies may be arranged in a row and stacked in sequence in the accommodating part of the bottom case, and the electric core assemblies may also be arranged in two or more rows and stacked in sequence in the accommodating part of the bottom case. The length of the electric core assembly and the length of the bottom shell can be set specifically.
In an embodiment, a plurality of first cell assemblies may be obtained to be installed in the accommodating portion of the bottom case in a serial forward stacking manner, and then a plurality of second cell assemblies may be obtained to be installed in the accommodating portion of the bottom case in a parallel reverse stacking manner with the first cell assemblies. Wherein, first electric core subassembly and second electric core subassembly belong to the same electric core subassembly. It is understood that each first cell assembly is mounted in a forward serial stacking manner, and each second cell assembly is mounted in a forward serial stacking manner. The first electric core assembly and the second electric core assembly are arranged in a parallel and reverse stacking mode. It should be noted that, the quantity of first electric core subassembly and second electric core subassembly can be according to actual conditions self-defining setting, but the quantity of first electric core subassembly and second electric core subassembly need keep unanimous.
Alternatively, in an embodiment, each cell assembly may be automatically stacked in the receiving portion of the bottom case by an industrial robot or a robot, and may also be manually stacked in the receiving portion of the bottom case. In the present embodiment, in order to improve the efficiency and automation level of the stack installation, each cell assembly is sequentially stacked and installed in the accommodating portion of the bottom case by an industrial robot or a robot.
S20: the electric core assembly installed in the accommodating part of the bottom case is electrically connected through the busbar.
Specifically, acquire female arranging, be equipped with the aluminium row in advance on this female arranging, carry out laser welding with the utmost point ear of installing each electric core subassembly in the holding portion of drain pan with the aluminium row on this female arranging to the electric core that makes each electric core subassembly realizes parallelly connected/series connection and forms the circuit. Preferably, in this embodiment, in order to improve the installation efficiency and the automation level, the aluminum bars on the busbar and the tabs of each cell assembly installed in the accommodating portion of the bottom case may be automatically laser-welded by an industrial robot or a robot, so that the cells of each cell assembly are connected in parallel/in series to form a circuit.
S30: glue is poured on the electric core assembly to fix the electric core assembly in the accommodating part of the bottom shell.
Specifically, after assembling the electric core assembly and the busbar to the accommodating part of the bottom case, heat-conducting pouring sealant is injected into the inner side surface of the accommodating part of the bottom case so as to ensure that each electric core assembly is assembled in the accommodating part of the bottom case more stably and to limit the movement of each electric core assembly in the bottom case. In addition, the heat-conducting pouring sealant can also be used for heat conduction, so that the heat generated during the working of each electric core assembly can be effectively dissipated by injecting the heat-conducting pouring sealant into the inner side surface of the accommodating part of the bottom shell.
S40: the cover plate is arranged at the opening of the bottom shell to form a cavity with relative sealing.
Specifically, the cover plate is fixedly arranged at the opening of the bottom shell to form a cavity with relative sealing. Alternatively, the cover plate may be fixedly installed at the opening of the bottom case by screws or fixing pins. Preferably, in this embodiment, in order to improve the installation efficiency and the automation level, the cover plate may be automatically installed at the opening of the bottom case by an industrial robot or a robot arm to form a cavity having a relatively sealed structure.
In a specific embodiment, the cover plate comprises two adjacent first cover plates and second cover plates. Therefore, the first cover plate is fixedly arranged at an opening corresponding to the bottom shell through screws or fixing pins; in order to facilitate the subsequent installation and stress of the second cover plate, the battery module can be reversely placed, namely the first cover plate to be installed is downward and used as a bottom cover, and then the second cover plate is fixedly installed at the other opening of the bottom cover through screws or fixing pins.
In the embodiment, each electric core assembly is sequentially stacked and mounted in the accommodating part of the bottom shell, and the bottom shell is provided with an opening; then the electric core components arranged in the containing part of the bottom shell are electrically connected through the bus bar; then, glue is poured into the electric core assembly to fix the electric core assembly inside the bottom shell; and finally, the cover plate is arranged at the opening of the bottom shell to form a cavity with relative sealing, the assembly process is simple and convenient, and the phenomenon that the battery cannot be assembled due to the irregular thickness can also occur.
In an embodiment, each of the electric core assemblies is sequentially stacked and mounted in the accommodating portion of the bottom case, which includes the following steps:
with each electricity core subassembly sets up side by side, each electricity core subassembly includes first connecting portion and second connecting portion: wherein, between two adjacent electric core subassemblies, connect through one first connecting portion of electric core subassembly and another the second connecting portion of electric core subassembly.
Specifically, the first convex structures on the first connecting parts are consistent with the second concave structures on the second connecting parts in size, shape and relative position relation. Therefore, the first protruding structure on the first connecting part of one electric core assembly and the second concave structure on the second connecting part of another electric core assembly can smoothly realize clamping between two adjacent electric core assemblies, and the two adjacent electric core assemblies are connected in parallel.
Or, between two adjacent electric core assemblies, the first connecting part of one electric core assembly is connected with the first connecting part of another electric core assembly, or the second connecting part of one electric core assembly is connected with the second connecting part of another electric core assembly.
Particularly, the first convex structure and the first concave structure on the first connecting part can be clamped in size and shape. Additionally, because first protruding structure and first indent structure arrange in turn, so electric core subassembly self can reverse one-to-one with self, and the second connecting portion are also like this, accomplish the series connection between two adjacent electric core subassemblies to guarantee the holistic stability of battery module.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. A battery shell is characterized by comprising a bottom shell and a cover plate, wherein a containing part for containing a battery assembly is arranged on the bottom shell, and an opening matched with the cover plate is formed in the containing part; the cover plate comprises a first cover plate and a second cover plate, the first cover plate and the second cover plate are detachably connected, and the first cover plate and the second cover plate are not located on the same plane when connected.
2. The battery case of claim 1, wherein the first cover plate and the second cover plate are perpendicular to each other when coupled.
3. The battery housing of claim 1, wherein the bottom shell comprises a bottom plate, two oppositely disposed side wall plates, and a back plate, and the bottom plate, the two side wall plates, and the back plate are fixedly connected.
4. A battery module comprising a battery pack and the battery case according to any one of claims 1 to 3, the battery pack being provided in the housing portion of the battery case.
5. The battery module according to claim 4, wherein the battery assembly comprises a plurality of cell assemblies and a busbar connected to a tab of each of the cell assemblies, the busbar is provided with an external connecting member, and the first cover plate or the second cover plate is provided with a notch corresponding to the external connecting member.
6. The battery module of claim 5, wherein the core assembly comprises a core body and a core tab support mounted to the core body
The tab of the body extends out of the end; each battery element assembly passes through the installation is piled up in proper order to electric core utmost point ear support.
7. The battery module of claim 6, wherein at least one set of first connecting portions is disposed on one side of the cell tab holder, and at least one set of second connecting portions is disposed on the other side of the cell tab holder; the first connecting portion comprises a first protruding structure and a first concave structure, and the second connecting portion comprises a second concave structure corresponding to and matched with the first protruding structure of the first connecting portion and a second protruding structure corresponding to and matched with the first concave structure of the first connecting portion.
8. The battery module according to claim 7, wherein the bottom of the accommodating portion is provided with a third concave structure, and the third concave structure is matched with the first convex structure or the second convex structure.
9. A method of assembling a battery module according to any one of claims 4 to 8, comprising:
sequentially stacking and installing each electric core assembly in a containing part of a bottom shell, wherein an opening is formed in the bottom shell;
electrically connecting the electric core assembly mounted in the accommodating part of the bottom case through a bus bar;
glue is poured into the electric core assembly to fix the electric core assembly in the accommodating part of the bottom shell;
and mounting the cover plate on the opening of the bottom shell to form a cavity with relative sealing.
10. The battery module assembling method according to claim 9, wherein the stacking of each of the cell assemblies in the accommodating part of the bottom case in turn comprises:
with each electricity core subassembly sets up side by side, each electricity core subassembly includes first connecting portion and second connecting portion:
the two adjacent electric core assemblies are connected through the first connecting part of one electric core assembly and the second connecting part of the other electric core assembly;
or,
between two adjacent electricity core subassemblies, through one the first connecting portion of electricity core subassembly and another the first connecting portion of electricity core subassembly are connected, perhaps through one the second connecting portion of electricity core subassembly and another the second connecting portion of electricity core subassembly are connected.
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Application publication date: 20201106 |