CN216250990U

CN216250990U - Take big module structure of liquid cooling system laminate polymer battery

Info

Publication number: CN216250990U
Application number: CN202121858085.9U
Authority: CN
Inventors: 林清; 马帅; 伍建中; 倪玉龙
Original assignee: Wanxiang A123 Systems Asia Co Ltd
Current assignee: Wanxiang A123 Systems Asia Co Ltd
Priority date: 2021-08-10
Filing date: 2021-08-10
Publication date: 2022-04-08
Anticipated expiration: 2031-08-10

Abstract

The utility model discloses a soft package battery large module structure with a liquid cooling system. In order to solve the problems of high cost, insufficient safety and low integration level of the battery module, the battery module comprises a shell module, a protection module, a tab support module and a small battery module, wherein the large battery module at least comprises two small battery modules, the tab support module is arranged on two sides of the small battery module, the protection module is arranged on one side of the tab support module, and the protection module, the tab support module and the small battery module are arranged in the shell module. The advantages are high integration level, high space utilization rate, effectively reducing cost and improving heat conduction efficiency.

Description

Take big module structure of liquid cooling system laminate polymer battery

Technical Field

The utility model relates to the technical field of battery module integration, in particular to a soft package battery large module structure with a liquid cooling system.

Background

With the gradual popularization and the popularization and application of the electric automobile, the safety problem of the electric automobile, particularly the battery system, also comes along. The safety design of the battery module, which is the smallest unit in the battery system, is undoubtedly more important.

At present, the adopted battery module does not structurally have a battery core heat dissipation function, has low integration level, cannot perform good heat exchange with the outside, can cause thermal runaway of adjacent battery cores under extreme conditions such as thermal runaway of certain battery cores, and can not quickly release energy accumulated by the thermal runaway in the battery module through a heat conduction and heat dissipation way and a gas discharge way, thereby causing more serious accidents such as fire, explosion and the like.

For example, a "soft package battery module" disclosed in chinese patent literature, which is published as 2019, 9 and 27 months, includes a module bottom plate and a battery unit, where the battery unit includes two parallel soft package cells and a fixing bracket for fixing the soft package cells, a fireproof insulating thermal insulation layer is disposed between the two soft package cells, a heat conductive aluminum plate is disposed on the outer side of the fixing bracket, the heat conductive aluminum plate is disposed closely to the soft package cells, and an insulating protective film is attached to the outer side of the heat conductive aluminum plate; the module bottom plate is provided with a groove matched with the fixed support and the heat-conducting aluminum plate in a clamping manner, and the bottom of the heat-conducting aluminum plate is fixed with the module bottom plate through heat-conducting glue. The utility model can delay the process that the normal electric core is contacted by the adjacent thermal runaway electric core to generate thermal runaway under extreme conditions, and can assist the rapid release of thermal runaway energy through the liquid cooling system under extreme conditions, thereby effectively prolonging the time of the overall thermal runaway of the battery module and the battery system and ensuring the personal safety of personnel on the electric automobile. This patent integrated level is low, and heat conduction efficiency is not high, and the degree of protection of whole module is on the low side, and the security is not enough and this system cost is higher.

Disclosure of Invention

The utility model mainly solves the problems of high cost, insufficient safety and low integration level of the battery module; the utility model provides a take big module structure of liquid cooling system laminate polymer battery.

The technical problem of the utility model is mainly solved by the following technical scheme:

the large battery module at least comprises two small battery module modules, the tab support module is arranged on two sides of the small battery module, the protection module is arranged on one side of the tab support module, and the protection module, the tab support module and the small battery module are all arranged in the shell module. The large battery module is formed by combining two identical small battery modules, so that the universality of parts is high, the integration level of a product is improved, the fixed space of the original two small battery modules is reduced, and the space density of the product is improved; the total positive and total negative of the module are separated from the middle part of the module, so that the module can be more reasonably arranged in the pack, and the lengths of high-voltage connection and low-voltage wire harnesses are reduced; the structure can be expanded to be at most parallel by single parallel connection of the battery cells under the condition of only replacing a small number of parts, and the universality of series products is improved.

Preferably, the shell module comprises an upper cover, an aluminum end plate and a liquid cooling bottom plate, the upper cover and the liquid cooling bottom plate are welded to form a pipeline with openings at two ends, the aluminum end plate is welded to two ends of the pipeline, and the aluminum end plate and the pipeline are wrapped by the protection module, the tab support module and the small battery module. The shell module wraps other parts, and a plurality of small holes are formed in the aluminum end plate, so that the air permeability is good, and the heat dissipation capability is strong.

Preferably, the small battery module is welded and fixed on the upper cover, the small battery module comprises heat-conducting glue, a battery cell, tabs, foam and an insulating plate, the heat-conducting glue is arranged between the small battery module and the liquid cooling bottom plate, one tab is respectively arranged on each of two sides of the battery cell, one foam is respectively arranged on each of the other two sides of the battery cell, and the insulating plate is only connected with the foam. By adopting the scheme, the heat in the module can be firstly conducted to the heat-conducting glue through the battery cell and then to the module bottom plate; insulation measures are already made on the surface of the liquid cooling bottom plate, and the heat of the battery core is directly conducted to the liquid cooling bottom plate through the heat conducting glue. Adopt this scheme bubble cotton can protect electric core can not receive the impact shadow influence, and the insulation board has played insulation protection's effect, can avoid the potential safety hazard that electric core electric leakage produced.

As preferred, utmost point ear support module include copper bar, positive negative pole ear support, voltage acquisition pencil and front and back utmost point ear support, positive negative pole ear support with front and back utmost point ear support on have a column stick, the copper bar on have a hole, the slim stick passes the copper bar on the aperture and the welding, the sampling terminal of voltage acquisition pencil one end with positive negative pole ear support on the copper bar welding, the sampling terminal of voltage acquisition pencil other end with front and back utmost point ear support on the copper bar welding, positive negative pole ear support with front and back utmost point ear support welded fastening be in the upper cover in. By adopting the scheme, the copper bar is more favorably connected and fixed with the positive and negative electrode lug supports and the front and rear electrode lug supports, and the connection stability is improved.

Preferably, the lug on one side of the battery cell is welded with the copper bars on the positive and negative lug supports, and the lug on the other side of the battery cell is welded with the copper bars on the front and rear lug supports. By adopting the scheme, the voltage signal of the battery cell can be better acquired, the battery cell can be monitored, and the stability of the battery cell can be improved.

As preferred, the protection module include positive and negative visor, front and back visor, well end plate and fixed block, the fixed block fix positive and negative visor on cover, positive and negative visor insert through the fixed block well end plate on the recess with well end plate connect, well end plate both sides respectively have one positive and negative visor, positive and negative visor with one side of positive and negative pole ear support pass through the buckle and connect, front and back visor with one side of front and back pole ear support pass through the buckle and connect, front and back visor the opposite side pass through buckle structure with the fixed laminating of aluminium end plate, positive and negative visor, front and back visor weld in the upper cover, well end plate weld the intermediate position in the upper surface of upper cover. By adopting the scheme, the two small battery modules can be isolated and protected, so that the two small battery modules are not influenced by each other.

Preferably, the upper cover has a length of 530mm to 570mm, a width of 470mm to 520mm, and a height of 80mm to 150 mm.

The utility model has the beneficial effects that:

1. the product is a large module structure of the soft package battery, the integration level is high, the space utilization rate is high, and the cost is effectively reduced;

2. the types and the quantity of heat transfer media are reduced, the heat transfer efficiency is improved, and the PACK heat management performance is improved;

3. the disassembly is simple, and the later maintenance is convenient.

Drawings

Fig. 1 is a structural diagram of a large module structure of a pouch battery with a liquid cooling system according to the present invention.

Fig. 2 is a battery cell structure diagram of a large module structure of a soft package battery with a liquid cooling system.

Fig. 3 is a schematic diagram of a large module structure of a pouch battery with a liquid cooling system according to the utility model.

In the figure, 1, an upper cover, 2, a copper bar, 3, positive and negative electrode lug supports, 4, positive and negative protective covers, 5, a voltage acquisition wiring harness, 6, front and rear electrode lug supports, 7, front and rear protective covers, 8, an aluminum end plate, 9, a liquid cooling bottom plate, 10, a middle end plate, 11, a fixed block, 12, heat conducting glue, 13, an electric core, 14, an electrode lug, 15, foam cotton, 16, an insulating plate, 17, low voltage and 18, high voltage are adopted.

Detailed Description

The technical scheme of the utility model is further specifically described by the following embodiments and the accompanying drawings.

Example (b):

the big module structure of soft-packaged battery of area liquid cooling system of this embodiment, as shown in fig. 1, including shell module, protection module, utmost point ear support module and the little module of battery, the big module of battery includes two little module of battery at least, and utmost point ear support module installs in the both sides of the little module of battery, and protection module installs in one side of utmost point ear support module, and protection module, utmost point ear support module and the little module of battery are all installed in shell module.

The shell module comprises an upper cover 1, an aluminum end plate 8 and a liquid cooling bottom plate 9, wherein the upper cover 1 and the liquid cooling bottom plate 9 are welded to form a pipeline with two open ends, the aluminum end plate 8 is welded to the two ends of the pipeline formed, and the aluminum end plate 8 and the pipeline formed wrap a protection module, a tab support module and a battery small module. The upper cover is 530 mm-570 mm long, 470 mm-520 mm wide and 80 mm-150 mm high.

The small battery module comprises a heat-conducting glue 12, a battery core 13, a lug 14, foam 15 and an insulating plate 16, the small battery module is welded and fixed on the upper cover 1, the heat-conducting glue 12 is arranged between the small battery module and the liquid cooling bottom plate 9 as shown in fig. 2, the lug 14 is respectively installed on two sides of the battery core 13, the foam 15 is respectively installed on the other two sides of the battery core 13, and the insulating plate 16 is only connected with the foam 15. By adopting the scheme, the heat in the module can be firstly conducted to the heat-conducting glue through the battery cell and then to the module bottom plate; insulation measures are already made on the surface of the liquid cooling bottom plate, and the heat of the battery core is directly conducted to the liquid cooling bottom plate through the heat conducting glue. The heat in the module is firstly conducted to the heat-conducting glue through the battery cell and then to the module bottom plate; insulation measures are already made on the surface of the liquid cooling bottom plate, heat of the battery core is directly conducted to the liquid cooling bottom plate through the heat conducting glue, and compared with a traditional module, the liquid cooling bottom plate reduces multiple layers of conducting media and improves heat conduction efficiency.

The utmost point ear support module includes copper bar 2, positive negative pole ear support 3, voltage acquisition pencil 5 and front and back utmost point ear support 6, there is the column stick on positive negative pole ear support 3 and front and back utmost point ear support 6, there is the aperture on the copper bar 2, the thin stick passes the aperture welding on the copper bar 2, the sampling terminal of 5 one ends of voltage acquisition pencil welds with copper bar 2 on the positive negative pole ear support 3, the sampling terminal of 5 other ends of voltage acquisition pencil welds with copper bar 2 on the utmost point ear support 6 around with, positive negative pole ear support 3 and front and back utmost point ear support 6 welded fastening are on upper cover 1. The utmost point ear 14 of electricity core 13 one side welds with copper bar 2 on the positive negative pole ear support 3, and the utmost point ear 14 of electricity core 13 opposite side welds with copper bar 2 on the utmost point ear support 6 around with, and the voltage signal of better collection electricity core monitors electric core, improves the stability of electric core.

The protection module comprises positive and negative protective covers 4, front and rear protective covers 7, a middle end plate 10 and a fixed block 11, the fixed block 11 is fixed on the positive and negative protective covers 4, the positive and negative protective covers 4 are inserted into a groove on the middle end plate 10 through the fixed block 11 and are connected with the middle end plate 10, two sides of the middle end plate 10 are respectively provided with the positive and negative protective covers 4, the positive and negative protective covers 4 are connected with positive and negative lug supports 3 through buckles, the front and rear protective covers 7 are connected with front and rear lug supports 6 through buckles, the front and rear protective covers 7 are fixedly attached to an aluminum end plate 8 through buckle structures, the positive and negative protective covers 4, the front and rear protective covers 7 and the middle end plate 10 are welded on the upper cover 1, and the middle end plate 10 is welded at a middle position in the upper surface of the upper cover 1.

In fig. 3, the two ends are at low pressure and the middle is at high pressure. This big module is two the same little module combinations, and spare part commonality is high, improves the product integration level, reduces the fixed space of former two little modules, improves product space density.

This structure can be under the condition of only changing a small amount of parts, and the single parallelly connected extension by electric core is parallelly connected at most, improves the commonality of series products, and the liquid cooling bottom plate combines together for traditional liquid cooling board and bottom plate, under the condition of guaranteeing functionality and intensity, has reduced the assembly process, reduces product cost.

It should be understood that the examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a take big module structure of liquid cooling system laminate polymer battery, a serial communication port, including shell module, protection module, utmost point ear support module and the little module of battery, the big module of battery includes two little module modules of battery at least, and utmost point ear support module installs in the both sides of the little module of battery, and protection module installs in one side of utmost point ear support module, and protection module, utmost point ear support module and the little module of battery are all installed in shell module.

2. The big module structure of soft package battery with liquid cooling system according to claim 1, wherein the outer shell module comprises an upper cover (1), an aluminum end plate (8) and a liquid cooling bottom plate (9), the upper cover (1) and the liquid cooling bottom plate (9) are welded to form a pipeline with two open ends, the aluminum end plate (8) is welded to two ends of the pipeline, and the aluminum end plate (8) and the pipeline are wrapped with a protection module, a tab support module and a small battery module.

3. The pouch battery large module structure with liquid cooling system according to claim 2, the lug support module comprises copper bars (2), positive and negative lug supports (3), a voltage collecting wire harness (5) and front and rear lug supports (6), the positive and negative pole ear supports (3) and the front and back pole ear supports (6) are provided with columnar bars, the copper bar (2) is provided with a small hole, the columnar bar passes through the small hole on the copper bar (2) and is welded, a sampling terminal at one end of the voltage acquisition wire harness (5) is welded with the copper bar (2) on the positive and negative ear brackets (3), the sampling terminal at the other end of the voltage acquisition wire harness (5) is welded with the copper bar (2) on the front and rear lug supports (6), the positive and negative electrode lug supports (3) and the front and rear electrode lug supports (6) are welded and fixed in the upper cover (1).

4. The big module structure of soft package battery with liquid cooling system of claim 3, characterized in that, the small battery module is welded and fixed on the upper cover (1), the small battery module comprises heat conducting glue (12), an electric core (13), tabs (14), foam (15) and an insulating plate (16), the heat conducting glue (12) is arranged between the small battery module and the liquid cooling bottom plate (9), the tabs (14) are respectively installed on two sides of the electric core (13), the foam (15) is respectively installed on the other two sides of the electric core (13), and the insulating plate (16) is only connected with the foam (15).

5. The big module structure of soft-package battery with liquid cooling system of claim 4, characterized in that, the tab (14) on one side of the battery cell (13) is welded with the copper bar (2) on the positive and negative tab supports (3), and the tab (14) on the other side of the battery cell (13) is welded with the copper bar (2) on the front and back tab supports (6).

6. The big die set structure of the soft-package battery with the liquid cooling system according to claim 3, wherein the protection module comprises a positive and negative protection cover (4), a front and back protection cover (7), a middle end plate (10) and a fixing block (11), the fixing block (11) is fixed on the positive and negative protection cover (4), the positive and negative protection cover (4) is inserted into a groove on the middle end plate (10) through the fixing block (11) and is connected with the middle end plate (10), the positive and negative protection cover (4) is respectively arranged on two sides of the middle end plate (10), the positive and negative protection cover (4) is connected with one side of the positive and negative lug support (3) through a buckle, the front and back protection cover (7) is connected with one side of the front and back lug support (6) through a buckle, the other side of the front and back protection cover (7) is fixedly attached to the aluminum end plate (8) through a buckle structure, the positive and negative protective covers (4), the front and rear protective covers (7) are welded in the upper cover (1), and the middle end plate (10) is welded in the middle of the upper surface of the upper cover (1).

7. The pouch battery large module structure with the liquid cooling system according to claim 2, wherein the upper cover (1) has a length of 530mm to 570mm, a width of 470mm to 520mm, and a height of 80mm to 150 mm.