CN210516803U

CN210516803U - Battery module and vehicle

Info

Publication number: CN210516803U
Application number: CN201921748091.1U
Authority: CN
Inventors: 周静
Original assignee: Evergrande New Energy Vehicle Technology Guangdong Co Ltd
Current assignee: Hengda hengchi new energy automobile technology (Guangdong) Co., Ltd
Priority date: 2019-10-17
Filing date: 2019-10-17
Publication date: 2020-05-12
Anticipated expiration: 2029-10-17

Abstract

The utility model relates to a battery field discloses a battery module and vehicle, wherein, the battery module includes the casing and sets up electric core in the casing, the tip of electric core is provided with busbar (1), the casing is including neighbouring end plate (2) of busbar (1) are provided with aluminium nitride potsherd (3) and elasticity biasing member (4) on end plate (2), elasticity biasing member (4) will aluminium nitride potsherd (3) biasing voltage is in on busbar (1). Through above-mentioned technical scheme, the elasticity biasing member supports the aluminium nitride potsherd and presses to the busbar on, avoids appearing the clearance between aluminium nitride potsherd and the busbar and influence the thermal conductivity to improve the thermal conductivity between busbar and the outer terminal plate, guaranteed that the inside heat that produces of electricity core can be quick derives, make the electricity core be in under suitable and balanced temperature condition, improve battery security and life-span.

Description

Battery module and vehicle

Technical Field

The utility model relates to a battery field specifically relates to a battery module to a vehicle is related to.

Background

The battery module includes casing structure and inside electric core, and the utmost point ear of electric core realizes parallelly connected or establishing ties through welding in the busbar, and the heat that produces when guaranteeing electric core charge-discharge distributes to the module outside, is in the same place through parts thermal coupling such as heat conduction glue, conducting strip usually between electric core and the module casing to realize the heat conduction route between electric core and the casing.

However, due to the problem of low thermal conductivity of components such as the heat conductive glue and the heat conductive sheet, the problems of heat dissipation and heat balance of the battery cell cannot be well realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a battery module to heat conductivility can not satisfy the problem of requirement between solution electric core and the casing.

In order to realize the above object, the utility model provides a battery module, wherein, battery module includes the casing and sets up electric core in the casing, the tip of electric core is provided with the busbar, the casing includes neighbouring the end plate of busbar, the end plate orientation one side of busbar is provided with the aluminium nitride potsherd and is located the end plate with elasticity biasing member between the aluminium nitride potsherd, elasticity biasing member will the aluminium nitride potsherd biasing is in on the busbar.

Alternatively, the resilient biasing member is a spring made of metal.

Optionally, the resilient biasing member is welded to the end plate and the aluminum nitride ceramic plate.

Optionally, the surface of the aluminum nitride ceramic plate facing the end plate is provided with a metal heat conducting plate, and the elastic biasing member is welded and connected to the metal heat conducting plate.

Optionally, an insulating cover plate is arranged between the end plate and the bus bar, and the insulating cover plate is formed with a through hole for accommodating the aluminum nitride ceramic plate.

Optionally, the surface of the end plate facing the busbar is provided with a blind bore to receive the resilient biasing member.

Optionally, the blind hole comprises a first section with a smaller inner diameter and a second section with a larger inner diameter, the first section and the second section are transited through a step surface, and the aluminum nitride ceramic plate is partially accommodated in the second section.

Optionally, the outer side of the end plate is provided with a heat dissipation plate thermally coupled to the end plate.

Optionally, a heat conducting pad is disposed between the heat dissipation plate and the end plate.

On the other hand, the utility model also provides a vehicle, wherein, the vehicle is provided with above scheme the battery module.

Through above-mentioned technical scheme, the elasticity biasing member supports the aluminium nitride potsherd and presses to the busbar on, avoids appearing the clearance between aluminium nitride potsherd and the busbar and influence the thermal conductivity to improve the thermal conductivity between busbar and the outer terminal plate, guaranteed that the inside heat that produces of electricity core can be quick derives, make the electricity core be in under suitable and balanced temperature condition, improve battery security and life-span.

Drawings

Fig. 1 is a schematic structural view of a battery module according to an embodiment of the present invention at an end plate;

fig. 2 is an exploded view of fig. 1.

Description of the reference numerals

1 bus bar 2 end plate

3 aluminium nitride ceramic piece 4 elastic biasing element

5 insulating cover plate 6 heat radiation plate

7 Heat conducting pad

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The utility model provides a battery module, wherein, battery module includes the casing and sets up electric core in the casing, the tip of electric core is provided with busbar 1, the casing is including neighbouring busbar 1's end plate 2, end plate 2 orientation one side of busbar 1 is provided with aluminium nitride potsherd 3 and is located end plate 2 with elasticity biasing member 4 between the aluminium nitride potsherd 3, elasticity biasing member 4 will aluminium nitride potsherd 3 biasing voltage is in on the busbar 1.

The casing of battery module encloses into the space that holds electric core by a plurality of plates, and the casing is inside to be provided with a plurality of electric cores, and electric core arranges with range upon range of mode.

Electric core is including setting up the utmost point ear at its tip, and the utmost point ear of a plurality of electric cores passes through busbar 1 and connects (establish ties or parallelly connected), and electric core produces the heat and conducts utmost point ear and busbar 1 when charge-discharge, and the aluminium nitride potsherd 3 that sets up between busbar 1 and adjacent end plate 2 can realize the heat conduction for the heat transfer of busbar 1 reaches end plate 2 department, also will the heat transfer of electric core arrives casing department, so that with the heat give off outside and heating panel on.

Among them, due to the dimension error between the aluminum nitride ceramic plate 3 and the bus bar 1, a gap is easily formed between the two to affect the heat conduction performance. In the scheme, referring to fig. 1 and fig. 2, an elastic biasing member 4 is arranged between the end plate 2 and the aluminum nitride ceramic plate 3, and the elastic biasing member 4 presses the aluminum nitride ceramic plate 3 against the bus bar 1 through the elastic biasing effect of the elastic biasing member 4, so that the aluminum nitride ceramic plate 3 and the bus bar 1 are tightly attached together, a gap between the two is avoided or reduced, and the heat conduction efficiency between the two is improved.

Alternatively, the resilient biasing member 4 is a spring made of metal. Referring to fig. 1 and 2, the resilient biasing member 4 is in the form of a coil spring and may be made of a metallic material having good thermal conductivity to facilitate heat transfer between the aluminum nitride ceramic plate 3 and the end plate 2. The resilient biasing member 4 may be made of a metal such as copper, iron or the like. In other embodiments, the resilient biasing member 4 may be a belleville spring or other resilient structure.

Further, the resilient biasing member 4 is welded to the end plate 2 and the aluminum nitride ceramic plate 3. The elastic biasing member 4 is welded with the end plate 2 and the aluminum nitride ceramic plate 3 to form a stable heat conduction path, and the influence of gaps formed between the elastic biasing member 4 and the end plate 2 and the aluminum nitride ceramic plate 3 on heat transfer is avoided.

Wherein, the surface of the aluminum nitride ceramic plate 3 facing the end plate 2 is provided with a metal heat conducting sheet, and the elastic biasing member 4 is welded and connected with the metal heat conducting sheet. The aluminum nitride ceramic plate 3 is relatively small in thickness and brittle and is easy to bend and break, so that a metal heat conducting sheet with good flexibility can be attached to the surface of the aluminum nitride ceramic plate 3, the overall strength is improved, and the aluminum nitride ceramic plate 3 is prevented from bending and breaking. In addition, the metal heat conducting strip is more easily welded to the resilient biasing member 4. The metal heat conducting strip can be a copper strip and the like, and can be connected with the aluminum nitride ceramic piece 3 in a welding mode.

In addition, as shown in fig. 1, an insulating cover plate 5 is disposed between the end plate 2 and the bus bar 1, and the insulating cover plate 5 is formed with a through hole for accommodating the aluminum nitride ceramic plate 3. In order to ensure the structural strength and the heat conduction performance, the end plate 2 is made of a metal material, so that the electrical connection between the bus bar 1 and the end plate 2 needs to be avoided, and an insulating cover plate 5 is additionally arranged between the end plate 2 and the bus bar 1 in the scheme, so that the end plate 2 and the bus bar 1 are spaced by the insulating cover plate 5. The insulating cover 5 may be made of an insulating plastic material and has a through-hole formed therein, in which the aluminum nitride ceramic plate 3 is received

Alternatively, the surface of the end plate 2 facing the busbar 1 is provided with a blind hole to receive the resilient biasing member 4. The blind holes can play a positioning role, so that the elastic biasing member 4 is stably fixed at a specific position of the end plate 2, on one hand, the assembly is convenient, and on the other hand, the elastic biasing member 4 can be prevented from being deviated in the use process of the battery module and finally being separated from the position between the end plate 2 and the aluminum nitride ceramic plate 3.

Furthermore, the blind hole comprises a first section with a smaller inner diameter and a second section with a larger inner diameter, the first section and the second section are transited through a step surface, and the aluminum nitride ceramic plate 3 is partially accommodated in the second section. Referring to fig. 2, the second section of the blind hole is relatively close to the outside, and the inner diameter of the blind hole is relatively large, so that the blind hole can be used for accommodating the aluminum nitride ceramic plate 3, positioning the aluminum nitride ceramic plate 3 is realized, and the aluminum nitride ceramic plate 3 is prevented from deviating relative to the end plate 2. The resilient biasing member 4 is mainly accommodated in the first section, but may of course also partly enter said second section.

Further, a heat radiation plate 6 thermally coupled to the end plate 2 is provided on the outer side of the end plate 2. The heat sink 6 may be connected as an extension of the end plate 2 to other heat dissipating structures, such as a coolant circulation system. And heat dissipation of the end plate 2 is realized. The heat sink 6 may be a mouthpiece structure or an integrated structure.

Further, a heat conducting pad 7 is arranged between the water cooling plate 6 and the end plate 2. The heat conducting pad 7 may have a certain elasticity to allow a certain installation error between the heat dissipating plate 6 and the end plate 2, and prevent the heat conducting performance from being affected by a gap between the end plate 2 and the heat dissipating plate 6.

On the other hand, the utility model also provides a vehicle, wherein, the vehicle is provided with above scheme the battery module. The vehicle can be an electric vehicle, a hybrid vehicle or a fuel vehicle, and the battery module can provide electric power for part of electronic equipment when the vehicle runs.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide the technical solution of the present invention with a plurality of simple modifications, including combining each specific technical feature in any suitable manner, and in order to avoid unnecessary repetition, the present invention does not provide additional description for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. The utility model provides a battery module, its characterized in that, battery module includes the casing and sets up electric core in the casing, the tip of electric core is provided with busbar (1), the casing includes and is close to end plate (2) of busbar (1), end plate (2) orientation one side of busbar (1) is provided with aluminium nitride potsherd (3) and is located end plate (2) with elasticity biasing member (4) between aluminium nitride potsherd (3), elasticity biasing member (4) will aluminium nitride potsherd (3) biasing is in on busbar (1).

2. A battery module according to claim 1, wherein the resilient biasing member (4) is a spring made of metal.

3. A battery module according to claim 2, characterised in that the resilient biasing member (4) is welded to the end plate (2) and the aluminium nitride ceramic plate (3).

4. A battery module according to claim 3, characterized in that the surface of the aluminium nitride ceramic plate (3) facing the end plate (2) is provided with a metal heat conducting plate to which the resilient biasing member (4) is welded.

5. The battery module according to claim 1, wherein an insulating cover plate (5) is provided between the end plate (2) and the bus bar (1), the insulating cover plate (5) being formed with a through hole that receives the aluminum nitride ceramic sheet (3).

6. A battery module according to claim 1, characterised in that the surface of the end plate (2) facing the busbar (1) is provided with a blind hole housing the resilient biasing member (4).

7. The battery module according to claim 6, characterized in that the blind hole comprises a first section with a smaller inner diameter and a second section with a larger inner diameter, the first section and the second section are transited by a step surface, and the aluminum nitride ceramic plate (3) is partially accommodated in the second section.

8. The battery module according to claim 1, wherein the outer side of the end plate (2) is provided with a heat dissipation plate (6) thermally coupled to the end plate (2).

9. The battery module according to claim 8, wherein a heat conductive pad (7) is provided between the heat dissipation plate (6) and the end plate (2).

10. A vehicle characterized in that the vehicle is provided with the battery module according to any one of claims 1 to 9.