CN210074099U

CN210074099U - Battery module, battery pack, electric vehicle and power grid system

Info

Publication number: CN210074099U
Application number: CN201921300490.1U
Authority: CN
Inventors: 郭良银; 郭鹏; 张毅鸿; 周颖; 赵吉勇; 龚青龙
Original assignee: Shenzhen Jiaming Ke Technology Co
Current assignee: SHENZHEN KARMING TECHNOLOGIES Co.,Ltd.; Zhejiang Jiaxi Technology Co.,Ltd.
Priority date: 2019-08-12
Filing date: 2019-08-12
Publication date: 2020-02-14
Anticipated expiration: 2029-08-12

Abstract

The utility model provides a battery module, including shell, electric core, soaking plate and heat abstractor. The shell comprises panels in the up-down, front-back, left-right and left-right directions. A plurality of electric cores are arranged in the shell. The soaking plate is arranged in the shell and clamped between the electric cores, and the soaking plate is filled with heat transfer working medium. The heat sink includes heat soaking, heat exchange and heat dissipating functions. The utility model discloses still provide battery package, electric motor car and the electric wire netting system that has this battery module. The soaking plate filled with the heat transfer working medium can quickly absorb heat generated in the charge and discharge process of the battery core and uniformly spread the heat to be transferred to the heat dissipation device, so that the inside of the battery module is quickly dissipated. Therefore, the battery pack, the electric vehicle and the power grid system can be prevented from influencing normal use or causing safety accidents due to insufficient heat dissipation of the battery module.

Description

Battery module, battery pack, electric vehicle and power grid system

Technical Field

The utility model relates to a battery technology field, in particular to battery module, battery package, electric motor car and electric wire netting system.

Background

The group battery is at the charge-discharge in-process, and the inside a large amount of heats that can gather of battery, if the heat is not timely discharged, then can lead to battery high temperature or temperature homogeneity relatively poor, not only can influence battery capacity, life, still can lead to the thermal runaway when serious, and then bring the battery to snap and open, smoke, can lead to the battery explosion even. On the contrary, when the battery pack is in a low temperature environment, the battery pack has a shortened service life, a rapidly decreased charge and discharge capacity, and a low battery utilization efficiency, and thus, it is very important to control the heat and temperature of the battery.

At present, the heat exchange of the battery pack generally adopts the following modes: (1) natural convection heat dissipation is achieved, the space of the battery pack is large, the battery pack is well contacted with air, the exposed part can naturally exchange heat with the air, but the heat dissipation is slow, and thermal runaway is easily caused; (2) the air-cooled structure dispels the heat, installs radiator fan additional in battery package one end, and the ventilation hole is left to the other end, makes the air flow with higher speed between electric core, takes away the heat of during operation, compares with natural convection heat dissipation, and the radiating rate increases to some extent, still has the soaking poor, can not effectively radiating when a large amount of heat gathers the problem, causes thermal runaway equally easily. (3) The liquid cooling structure dispels the heat, and the heat of electricity core passes through heat conduction silica gel piece and transmits to the liquid cooling pipe, is taken away the heat by the free circulation flow of cooling liquid expend with heat and contract with cold, but its adoption is closed free liquid cooling circulation (passive liquid cooling), and although the cooling liquid is great than the heat capacity, can absorb a large amount of heat, and the cooling effect also far than two kinds of preceding modes are good, but the system cooling liquid is limited, and the velocity of flow is also limited, and the soaking effect is not good, therefore the temperature control ability is limited.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the utility model aims to provide a battery module, battery package, electric motor car and electric wire netting system for the heat transfer heat exchange efficiency who exists among the solution prior art is low, causes thermal runaway easily, is at the unable problem of charging and discharging of extremely cold area battery simultaneously.

In order to achieve the above objects and other related objects, the present invention provides a battery module, including:

the shell comprises six panels which are oppositely arranged up and down, front and back, left and right;

the battery cell is in a cuboid shape, is arranged in the shell, is installed on the bottom panel and extends towards the top panel;

the soaking plates are arranged in the shell and clamped between the battery cells, at least one battery cell is clamped between every two adjacent soaking plates, and the soaking plates are filled with heat transfer working mediums;

the heat dissipation device is arranged in the shell, is arranged at the top or the bottom of the battery and the soaking plate and plays roles in soaking, heat exchange and heat dissipation; the heat dissipation device comprises a heat superconducting pipeline, and a heat transfer working medium is filled in the heat superconducting pipeline; the heat dissipation device further comprises a refrigerant channel or a fin.

Preferably, the upper end or the lower end or the upper end and the lower end of the soaking plate are provided with right-angle folded edges, so that the contact area between the soaking plate and the flexible insulating heat-conducting strip is increased, and the electric core is stabilized and protected.

Preferably, the two polarity terminals of the cell are respectively on two opposite sides of the cell.

Preferably, flexible insulating heat conducting fins are clamped between the soaking plate and the battery cell and the heat dissipation device.

Preferably, the heat dissipation device is provided with a heat superconducting pipeline, and the heat superconducting pipeline is filled with a heat transfer working medium.

Preferably, the heat dissipation device is provided with a refrigerant channel, the refrigerant channel surrounds the heat superconducting pipeline, two ends of the refrigerant channel are not sealed on the heat dissipation device, and the refrigerant enters from an inlet of the refrigerant channel and then absorbs heat or releases heat and flows out from an outlet of the refrigerant channel.

Preferably, the heat sink has fins thereon, the fins being arranged at an angle θ and connected to the heat sink, wherein 0 < θ <180 °.

The utility model discloses still provide a battery package, be range upon range of or set up side by side including at least two the battery module.

The utility model also provides an electric vehicle, include the battery package.

The utility model also provides a power grid system, include the battery package, power grid system is smart power grids system, wind-powered electricity generation system or solar energy system.

The utility model provides a battery module, including shell, electric core, soaking plate and heat abstractor. The electric core, the soaking plate and the heat dissipation device are all arranged in the shell. The soaking plate is filled with the panel of heat transfer working medium, has the characteristics that heat transfer rate is fast and the temperature uniformity is good, can absorb the heat that the electricity core charge-discharge in-process produced fast to spread the heat and give heat abstractor for the inside quick heat dissipation of messenger's battery module. The cooling device is provided with the refrigerant channel or the fins, so that heat can be taken away quickly, and the influence on normal use or safety accidents caused by insufficient heat dissipation of the battery pack, the electric vehicle and the power grid system due to insufficient heat dissipation of the battery module can be avoided.

Drawings

Fig. 1 is a schematic diagram showing an external structure of a battery module according to an embodiment of the present invention.

Fig. 2 is a schematic view of the soaking plate of the battery module according to the present invention.

Fig. 3 is a schematic view of the heat dissipation device in fig. 1.

Fig. 4 is a schematic external structural view of another embodiment of the battery module according to the present invention.

Fig. 5 is a schematic view of the heat dissipation device in fig. 4.

Element number description: 1-battery module, 11-upper housing panel, 12-lower housing panel, 13-rear housing panel, 14-left housing panel, 15-right housing panel, 16-front housing panel, 17-insulating buffer pad, 2-cell, 21-first polarity terminal, 22-second polarity terminal, 3-flexible insulating heat conducting sheet, 41-soaking plate, 411-heat superconducting pipeline, 412-upper end folding edge, 413-lower end folding edge, 42-heat dissipation plate, 421-refrigerant channel, 422-refrigerant inlet, 423-refrigerant outlet, 43-air cooling plate, 431-substrate, 432-fin, 433-fixing hole, 51-limiting row, 52-connecting piece.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The embodiments of the present invention will be described in detail with reference to the specific embodiments, and other advantages and effects of the invention will be apparent to those skilled in the art from the disclosure herein, and the invention may be embodied or applied in other different forms without departing from the spirit of the invention.

The embodiment of the present invention provides a battery module 1, please refer to fig. 1 and fig. 4, the battery module 1 includes a housing, a battery cell 2, a soaking plate 41 and a heat dissipation device.

The housing includes panels in six directions, up, down, front, rear, left, and right, wherein the upper housing portion 11 and the lower housing portion 12 are disposed opposite to each other, the left housing portion 14 and the right housing portion 15 are disposed opposite to each other, and the front housing portion 16 and the rear housing portion 13 are disposed opposite to each other. It will be appreciated that the housing and insulating cushion 17 serves to protect the cells, the thermal spreader and the heat sink.

A plurality of cells 2 are disposed within the housing, mounted on the housing lower panel 12, and extend toward the housing upper panel 11. The cell is rectangular, and the first polarity terminal 21 and the second polarity terminal 22 of the cell 2 face the left side panel 14 and the right side panel 15 of the housing, respectively. The plurality of battery cells 2 are arranged in a certain series-parallel arrangement mode, the limiting row 51 is used for fixing the positions of the plurality of battery cells 2, the polarity terminals 21 or 22 of the battery cells 2 penetrate through a gap in the middle of the limiting row 51, and then the connecting piece 52 is connected with the polarity terminals of two adjacent battery cells.

The soaking plate 41 is arranged in the shell, a closed heat superconducting pipeline 411 is arranged in the soaking plate 41, and a heat transfer working medium (not shown) is filled in the heat superconducting pipeline 411. It is understood that the thermal superconducting pipeline can be in a single-side swelling, double-side swelling or double-side flat structure on the soaking plate. The filled heat transfer working medium can be gas or liquid or a mixture of gas and liquid, such as water, oil, refrigerant and the like. The upper end or the lower end or the upper end and the lower end of the soaking plate are provided with right-angled folded edges for increasing the contact area of the soaking plate 41 and the flexible insulating heat-conducting strip 3.

The heat dissipation device is arranged in the shell and is arranged at the top or the bottom of the electric core 2 and the soaking plate 41, a heat superconducting pipeline 411 is arranged in the heat dissipation device, and heat transfer working media are filled in the heat superconducting pipeline 411; the heat dissipation device further includes a cooling medium channel 421 or a fin 432 to accelerate heat dissipation.

The utility model discloses technical scheme provides a battery module, including shell, a plurality of electric core, soaking plate and heat abstractor. The electric core, the soaking plate and the heat dissipation device are arranged in the shell. The soaking plate quickly absorbs heat generated in the charging and discharging processes of the battery core and spreads the heat evenly to be quickly transmitted to the heat dissipation device, so that the inside of the battery module is quickly dissipated.

Referring to fig. 2, heat superconducting pipes 411 are distributed inside the soaking plate 41, and the heat superconducting pipes 411 are used for filling the heat transfer working medium. The heat superconducting pipeline 411 is in a single-sided expansion, double-sided expansion or double-sided flat structure on the soaking plate. The heat superconducting pipeline 411 is of a closed structure, and the shape of the closed heat superconducting pipeline 411 may be a hexagonal honeycomb shape, a quadrilateral shape, a trilateral shape, a circular shape and a zigzag shape which are communicated with each other, or a shape with a cross section parallel to each other, such as a circular shape, an oval shape or a polygonal shape, or any combination of any two or more of the figures. The upper end and the lower end of the soaking plate are provided with right-angled folded edges in the same direction, and the width of the folded edges is equivalent to the thickness of the battery cell.

In an embodiment of the present invention, please refer to fig. 1 and fig. 3, a plurality of battery cells 2 are arranged in a housing in a certain series-parallel arrangement, the battery cells are rectangular, and two polarity terminals of the battery cells 2 are respectively on the left and right sides of the battery cells 2; the electric core 2 is clamped between the soaking plates 41, and at least one electric core is clamped between every two adjacent soaking plates; the soaking plate 2 has a folded edge at both the upper end and the lower end, and of course, in other embodiments, the folded edge may be at the upper end or the lower end of the soaking plate 41. The heat dissipation device is a heat dissipation plate 42 and is located above the electric core 2 and the soaking plate 41. Of course, in other embodiments, the heat spreader may be located at the bottom of the electric core 2 and the soaking plate 41. Heat superconducting pipe 411 and refrigerant channel 421 are distributed inside heat dissipation plate 42. The heat superconducting pipe 411 is used to fill the heat transfer medium, and the refrigerant channel 421 is used to introduce any one or more refrigerants such as water, oil, and air. The heat superconducting pipe 411 and the refrigerant passage 421 are formed in a single-sided expansion, double-sided expansion, or double-sided flat structure on the heat radiating plate 42. The heat superconducting pipeline 411 is of a closed structure, and the shape of the closed heat superconducting pipeline 411 may be a hexagonal honeycomb shape, a quadrilateral shape, a trilateral shape, a circular shape and a zigzag shape which are communicated with each other, or a shape with a cross section parallel to each other, such as a circular shape, an oval shape or a polygonal shape, or any combination of any two or more of the figures. Similarly, the cross section of the refrigerant channel 421 may be square, circular, or diamond.

Further, the refrigerant channel 421 surrounds the heat superconducting pipe 411 in a zigzag shape, both ends of the refrigerant channel 421 are connected, and a refrigerant enters from a refrigerant inlet 422 of the refrigerant channel 421, absorbs or releases heat, and then flows out from a refrigerant outlet 423. One or more kinds of refrigerants such as water, oil, and air may be introduced into the refrigerant passage 421. The heat dissipation plate filled with the heat transfer working medium has good heat conductivity and temperature uniformity, and the heat dissipation rate is further improved by the action of the refrigerant channel 421.

In another embodiment of the present invention, please refer to fig. 4 and 5, the heat dissipation device is an air cooling plate 43 with fins, which is located on the upper portion of the electrical core 2 and the soaking plate 41. Of course, in other embodiments, the heat spreader may be located at the bottom of the electric core 2 and the soaking plate 41. The base plate 431 of the air cooling plate 43 is internally filled with a heat transfer working medium (not shown). Fixing holes 433 are respectively formed in four corners of the base plate 431, and the fixing holes 433 are used for fixedly connecting the air cooling plate 43 with the whole battery module 1. The fins 432 are perpendicular to the base 431. Of course, in other embodiments, the fins 432 may be disposed on the base 432 at different angles. The fins 432 may be coupled to the base plate by welding, aluminum extrusion, casting, machining, punching, etc., thereby further dissipating heat from the inside of the battery module 1.

Battery module 1 still includes the flexible insulating conducting strip 3 of polylith, flexible insulating conducting strip 3 presss from both sides and locates between soaking plate 41, electric core 2 and heat abstractor, and flexible insulating conducting strip 3 is used for giving soaking plate 41 and heat abstractor with the heat transfer of electric core 2, and the heat conductivity of flexible insulating conducting strip is favorable to soaking plate 41 to absorb the heat of electric core 2, and the flexibility and the insulating nature of flexible insulating conducting strip can protect electric core 2 to avoid the collision and the conductive interference of soaking plate 41 simultaneously. Since the heat conductive silica gel has good heat conductive performance and insulating performance, the heat conductive silica gel is usually used as a main material of the flexible insulating heat conducting sheet. Of course, the flexible insulating heat conducting sheet can also adopt other flexible insulating heat conducting materials or flexible phase change materials with insulating property. It can be understood that the existence of the flexible insulating heat-conducting sheet reduces the probability of air heat transfer between the soaking plate 41 and the battery cell 2, and between the heat dissipation device and the soaking plate 41, and thus, the heat transfer efficiency of the whole battery module 1 may be reduced due to the large thermal resistance of the air heat transfer.

The utility model also provides a battery package. The battery pack includes at least two battery modules 1 stacked or arranged side by side. The specific structure of the battery module 1 refers to the above embodiment. Since the battery pack adopts all technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here. It is understood that the battery pack includes a control system, an electric system, and the like, in addition to the battery module.

The utility model discloses still provide an electric motor car. The electric vehicle includes the battery pack, the battery pack includes the battery module 1, and the specific structure of the battery module 1 refers to the above embodiment. Since the electric vehicle adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here. It is understood that the electric vehicle may be an electric automobile, an electric motorcycle, an electric balance car, or the like.

The utility model discloses still provide a grid system. The power grid system includes the battery module 1, and the specific structure of the battery module 1 refers to the above embodiment. Since the power grid system adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here. It is understood that the grid system may be a smart grid system, a wind power system, a solar power system, or the like.

The above embodiments are merely illustrative of the principles and effects of the present invention, and do not limit the scope of the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be accomplished by those skilled in the art without departing from the spirit and scope of the present invention shall be covered by the appended claims.

Claims

1. A battery module, comprising:

a housing;

the battery cell is arranged in the shell;

the soaking plate is arranged in the shell and clamped between the battery cores, a heat superconducting pipeline is arranged in the soaking plate, and heat transfer working media are filled in the heat superconducting pipeline;

the heat dissipation device is arranged in the shell and is arranged at the top or the bottom of the battery cell and the soaking plate; the heat dissipation device is filled with heat transfer working media and further comprises a refrigerant channel or a fin.

2. The battery module according to claim 1, wherein the upper end or the lower end or the upper end and the lower end of the soaking plate are provided with right-angled folded edges, so that the contact area between the soaking plate and the flexible insulating heat conducting sheet is increased, and the battery core is stabilized and protected.

3. The battery module of claim 2, wherein the bipolar terminals of the cells are on opposite sides of the cells, respectively.

4. The battery module according to claim 3, wherein flexible insulating heat conducting fins are sandwiched between the soaking plate and the battery cell and the heat dissipation device.

5. The battery module according to claim 4, wherein the heat dissipation device comprises a heat superconducting pipeline, and the heat superconducting pipeline is filled with a heat transfer working medium.

6. The battery module as recited in claim 5, wherein the heat sink has a coolant channel therein, the coolant channel surrounds the thermal superconducting circuit, two ends of the coolant channel are not sealed on the heat sink, and the coolant enters from an inlet of the coolant channel and then absorbs or releases heat and flows out from an outlet of the coolant channel.

7. The battery module according to claim 5, wherein the heat sink has fins thereon, the fins being arranged at an angle θ and connected to the heat sink, wherein 0 ° < θ <180 °.

8. A battery pack comprising at least two battery modules according to any one of claims 1 to 7 stacked or arranged side by side.

9. An electric vehicle comprising the battery pack according to claim 8.

10. An electrical grid system comprising the battery pack of claim 8, wherein the electrical grid system is a smart grid system, a wind power system, or a solar power system.