CN207572496U - battery module - Google Patents

Abstract

The utility model provides a kind of battery modules, including：Multiple batteries, arrange along its length, and each battery has the opposite electrode terminal of electric polarity；Multiple electric connecting sheets, each electrode terminal of each battery are electrically connected to a corresponding electric connecting sheet；Heat conduction upper cover, positioned at the top of the multiple battery；And at least one heat-conducting plate, each heat-conducting plate are in direct contact heat conduction upper cover and at least one electric connecting sheet.Since there is the heat conduction upper cover in battery modules good thermal conductivity, battery modules to be provided at least one heat-conducting plate, and each heat-conducting plate is in direct contact heat conduction upper cover and at least one electric connecting sheet, therefore when battery modules work, the heat generated on the electric connecting sheet that at least one heat-conducting plate is directly contacted is transferred in heat conduction in time on lid, heat conduction upper cover is distributed heat in external environment again, so as to fulfill the fast cooling to each battery in battery modules.This cooling method is simple, quick, and will not increase the structure complexity of battery modules.

Description

battery module

technical field

The utility model relates to the technical field of batteries, in particular to a battery module.

Background technique

For new energy vehicles, how to improve the mileage capability has always been the focus of attention. As an important part of improving the mileage capability, fast charging technology can solve the pain point of short mileage of new energy vehicles, and is an important development direction of the new energy vehicle industry. At present, there are three different ways to realize fast charging: one is to increase the current without changing the voltage; the other is to increase the voltage without changing the current; the third is to increase both the voltage and current.

At this stage, most battery modules use high current to achieve fast charging. However, realizing fast charging of the battery module by a large current method will cause a large amount of heat to be generated on the electrical connection pieces in the battery module and the electrode terminals of the battery, so that the temperature of the battery module will become very high, which will be very It is easy to cause the temperature rise of each battery in the battery module to be out of control, thereby causing smoke, fire, or even explosion of each battery.

At present, in order to solve the above-mentioned problems, the existing solutions usually have the following types: (1) increase the flow area of the electrode terminal of the electric connection piece and the battery, thereby reducing the heat of the overcurrent, but due to the increase of the electric connection piece or the battery The space is limited, so the cooling effect is relatively general; (2) measure the temperature by arranging a temperature sensing device at the battery and the electrical connection piece, obtain their charge and discharge curves and perform temperature correction through the battery management system (BMS), but This scheme will make the BMS design very complicated.

Utility model content

In view of the problems existing in the background technology, the purpose of this utility model is to provide a battery module, which can transfer the heat generated by the electrical connection sheet to the heat-conducting upper cover in time, so as to realize the rapid recovery of each battery in the battery module. Cool down.

In order to achieve the above object, the utility model provides a battery module, which includes: a plurality of batteries arranged along the length direction, each battery has electrode terminals with opposite polarities; a plurality of electrical connecting pieces, each electrode terminal of each battery Electrically connected to a corresponding electrical connection sheet; a heat conduction upper cover, located above the plurality of batteries; and at least one heat conduction plate, each heat conduction plate directly contacts the heat conduction upper cover and at least one electrical connection sheet.

The beneficial effects of the utility model are as follows:

In the battery module according to the utility model, since the heat-conducting upper cover in the battery module has good thermal conductivity, the battery module is provided with at least one heat-conducting plate, and each heat-conducting plate directly contacts the heat-conducting upper cover and at least one electrical connection sheet, so when the battery module is working, the at least one heat conduction plate directly transfers the heat generated on the electrical connection sheet it contacts to the heat conduction upper cover in time, and then the heat conduction upper cover dissipates the heat to the external environment, thereby realizing the Rapid cooling of each battery in the battery module. In addition, this cooling method is simple and fast, and does not increase the structural complexity of the battery module.

Description of drawings

FIG. 1 is an exploded view of a battery module according to the present invention.

Fig. 2 is a perspective view of the insulation board in Fig. 1 .

Fig. 3 is a perspective view of the heat conducting plate in Fig. 1, which can cooperate with the insulating plate in Fig. 2 .

Fig. 4 is a modified example of the insulating plate in Fig. 1 .

Fig. 5 is a modified example of the heat conduction plate in Fig. 3, which can cooperate with the insulating plate in Fig. 4 .

Fig. 6 is a perspective view of the lower case in Fig. 1 .

Fig. 7 is a schematic diagram of the installation of the lower box body and the end plate in Fig. 1 .

Wherein, the reference signs are explained as follows:

1 battery 53 second plate body

11 electrode terminal 6 end plate

2 electrical connecting pieces 61 main body

3 heat conduction upper cover 62 convex parts

31 Fitting part 7 Insulation plate

4 heat conduction plate 71 first through hole

5 lower box body 72 second through hole

51 Bottom plate L length direction

52 first plate body W width direction

521 opening H height direction

Detailed ways

The battery module according to the present invention will be described in detail below with reference to the accompanying drawings.

1 to 7, the battery module according to the present invention includes: a plurality of batteries 1 arranged along the length direction L, each battery 1 has an electrode terminal 11 with opposite polarity; a plurality of electrical connecting pieces 2, each battery 1 Each electrode terminal 11 of each electrode terminal 11 is electrically connected to a corresponding electrical connection sheet 2; a thermally conductive upper cover (made of thermally conductive material) 3 is located above the plurality of batteries 1; and at least one thermally conductive plate 4, each thermally conductive plate 4 directly contacts A thermally conductive upper cover 3 and at least one electrical connection sheet 2 .

In the battery module according to the utility model, since the heat conduction upper cover 3 in the battery module has good thermal conductivity, the battery module is provided with at least one heat conduction plate 4, and each heat conduction plate 4 directly contacts the heat conduction upper cover 3 and At least one electrical connection piece 2, so when the battery module is working, the at least one heat conduction plate 4 directly transfers the heat generated on the electrical connection piece 2 that it contacts to the heat conduction upper cover 3 in time, and then the heat conduction upper cover 3 turns the The heat is dissipated to the external environment, thereby realizing rapid cooling of each battery 1 in the battery module. In addition, this cooling method is simple and fast, and does not increase the structural complexity of the battery module.

The heat conducting plate 4 is made of a material that conducts heat but does not conduct electricity. In this way, the heat conduction plate 4 will not affect the electrical connection in the battery module when it conducts heat.

Referring to FIG. 5 , there can be one heat conduction plate 4 , and the one heat conduction plate 4 is in direct contact with all the electrical connecting pieces 2 at the same time. At this time, the shape of the one heat conducting plate 4 may be a closed ring.

Referring to Fig. 1 and Fig. 3, there may be two heat conduction plates 4, and the two heat conduction plates 4 are respectively located at both ends of the width direction W of the battery module, and each heat conduction plate 4 is simultaneously connected with all the electrical connection pieces 2 at the corresponding ends of the width direction W. direct contact. At this time, each heat conducting plate 4 may be in the shape of a strip.

Certainly, the quantity of heat conduction plate 4 is not only limited to above-mentioned one or two, and the quantity of heat conduction plate 4 can also be equal to the quantity of electric connection piece 2, and such a heat conduction plate 4 directly contacts corresponding one electric connection piece 2, thereby through all The electrical connecting sheet 2 performs dispersive heat dissipation, which improves the heat dissipation efficiency and enables the temperature of each battery 1 in the battery module to drop rapidly.

What is supplemented here is that no matter how the number of heat conduction plates 4 is selected, in order to ensure the heat conduction efficiency of each heat conduction plate 4, the contact area between each heat conduction plate 4 and the corresponding electrical connection piece 2 cannot be too small, so when designing and manufacturing the heat conduction plate 4, the size of each heat conduction plate 4 should be reasonably designed and manufactured based on the difference in the number of heat conduction plates 4 and electrical connection pieces 2 and the size of each electrical connection piece 2 .

Referring to FIG. 1 , FIG. 6 and FIG. 7 , the battery module may further include: a lower case 5 for accommodating the plurality of batteries 1 and assembled on the heat-conducting upper cover 3 . Further referring to Fig. 6 and Fig. 7, the lower box body 5 may comprise: a base plate 51; two first plates 52, respectively fixedly connected to both ends of the length direction L of the base plate 51; and two second plates 53, fixed respectively Connected to both ends of the bottom plate 51 in the width direction W, each second plate body 53 is fixedly connected to two first plate bodies 52 .

Referring to FIG. 1 and FIG. 7 , the battery module may further include: two end plates 6 , respectively fixedly connected to a first plate body 52 of the lower box body 5 .

Referring further to FIG. 1 and FIG. 7 , each end plate 6 can be located inside the lower box body 5 , and the heat conduction upper cover 3 is hermetically assembled on the two end plates 6 and the two second plates 53 of the lower box body 5 . Specifically, each first plate body 52 may have: an opening 521 (which may be "U" shaped). Each end plate 6 may have: a main body 61 located inside the corresponding first plate 52; and a convex portion 62 protruding from the main body 61 and extending into the opening 521 of the corresponding first plate 52, and protruding The outer peripheral surface of the portion 62 is in face-to-face contact with the inner peripheral surface of the opening portion 521 and welded (such as laser welding) together.

During the welding process, welding can be carried out along the contact and mating surface of each end plate 6 and the corresponding first plate body 52, thereby forming multiple weld seams and improving the welding strength; at the same time, based on the thickness of the first plate body 52, The contact surface of the two is generally relatively narrow, which is convenient to control the formation direction of the weld, which helps to control the appearance of the weld, ensure the quality of the weld, and improve the sealing of the weld. And, based on the sealing fit between the heat conduction upper cover 3 and each end plate 6 and the lower box body 5, and the sealing performance of the weld seam formed between each end plate 6 and the corresponding first plate body 52 of the lower box body 5 , so as to ensure the overall sealing of the battery module.

Referring to FIG. 1 , the battery module may further include: an insulating plate 7 disposed between the heat-conducting upper cover 3 and each electrical connecting sheet 2 . The insulating plate 7 is used to realize the insulating assembly between the heat-conducting upper cover 3 and each electrical connecting sheet 2 .

Referring to FIG. 2 and FIG. 4 , the insulating plate 7 may have: at least one first through hole 71 , and each first through hole 71 accommodates a corresponding heat conducting plate 4 . Wherein, each heat conduction plate 4 can be made of elastic material or non-elastic material. When each heat conduction plate 4 is made of elastic material, each heat conduction plate 4 is compressed to be accommodated in the corresponding first through hole 71. At this time Based on the elastic extrusion force of the heat conduction plate 4, the movement of each battery 1 along the height direction H is limited; and when each heat conduction plate 4 is made of non-elastic material, the heat conduction plate 4 can transition to the corresponding first through hole 71 In this case, the first through hole 71 needs to be reasonably set based on the size of each electrical connection piece 2 to ensure the contact area between the heat conducting plate 4 and each electrical connection piece 2 .

Referring to FIG. 2 , the insulating plate 7 may also have a second through hole 72 . The heat conduction upper cover 3 may have: a mating portion 31 , which is concave-convex-convex-convex-convex-convex-cooperate with the second through hole 72 .

It is supplemented here that the overall height of the battery module can be effectively reduced by adopting an arrangement in which each heat conduction plate 4 is accommodated in the corresponding first through hole 71, and the mating portion 31 of the heat conduction upper cover 3 and the second through hole 72 are concave-convex. , which is conducive to improving the volumetric energy density of the module.

Claims (10)

1. a kind of battery modules, including：

Multiple batteries (1), along its length (L) arrangement, each battery (1) have the opposite electrode terminal (11) of electric polarity；

Multiple electric connecting sheets (2), each electrode terminal (11) of each battery (1) are electrically connected to a corresponding electric connecting sheet (2)；And

Heat conduction upper cover (3), positioned at the top of the multiple battery (1)；

It is characterized in that, battery modules further include：At least one heat-conducting plate (4), each heat-conducting plate (4) are in direct contact heat conduction upper cover (3) and at least one electric connecting sheet (2).

2. battery modules according to claim 1, which is characterized in that

Heat-conducting plate (4) is one, a heat-conducting plate (4) while is in direct contact with all electric connecting sheets (2), a heat conduction The shape of plate (4) is closed circular；Or

Heat-conducting plate (4) be two, two heat-conducting plates (4) respectively be located at width direction (W) both ends, and each heat-conducting plate (4) at the same with All electric connecting sheets (2) in width direction (W) corresponding end are in direct contact, and each heat-conducting plate (4) is strip.

3. battery modules according to claim 1, which is characterized in that the quantity of heat-conducting plate (4) is equal to electric connecting sheet (2) Quantity, each heat-conducting plate (4) are in direct contact a corresponding electric connecting sheet (2).

4. battery modules according to claim 1, which is characterized in that battery modules further include：Lower box (5), collecting post It states multiple batteries (1) and is assemblied in heat conduction upper cover (3).

5. battery modules according to claim 4, which is characterized in that lower box (5) includes：

Bottom plate (51)；

Two the first plate bodys (52) are respectively fixedly connected in length direction (L) both ends of bottom plate (51)；And

Two the second plate bodys (53) are respectively fixedly connected in width direction (W) both ends of bottom plate (51), and each second plate body (53) is admittedly Surely two the first plate bodys (52) are connected to.

6. battery modules according to claim 5, which is characterized in that battery modules further include：Two end plates (6), respectively It is fixedly connected on first plate body (52) of lower box (5).

7. battery modules according to claim 6, which is characterized in that

Each end plate (6) is positioned at the inside of lower box (5)；

Heat conduction upper cover (3) sealing is assemblied in two end plates (6) and two the second plate bodys (53) of lower box (5).

8. battery modules according to claim 1, which is characterized in that battery modules further include：Insulation board (7), is set to Between heat conduction upper cover (3) and each electric connecting sheet (2).

9. battery modules according to claim 8, which is characterized in that insulation board (7) has：At least one first through hole (71), each corresponding heat-conducting plate (4) of first through hole (71) receiving.

10. battery modules according to claim 9, which is characterized in that

Insulation board (7) also has there are one the second through-hole (72)；

Heat conduction upper cover (3) has：Auxiliary section (31), be outer recessed convex structure with the second through-hole (72) male-female engagement.