CN219498133U

CN219498133U - Fuse assembly for battery pack and battery pack

Info

Publication number: CN219498133U
Application number: CN202320078574.5U
Authority: CN
Inventors: 朱立德; 谢学健; 宋世柳
Original assignee: Weilai Battery Technology Anhui Co ltd
Current assignee: Weilai Battery Technology Anhui Co ltd
Priority date: 2023-01-10
Filing date: 2023-01-10
Publication date: 2023-08-08
Anticipated expiration: 2033-01-10

Abstract

The utility model relates to a fuse assembly for a battery pack and the battery pack, which comprises a fuse, a shell, a negative electrode post copper bar and a positive electrode post copper bar, wherein the fuse is arranged in the shell and is connected with a first end part of the positive electrode post copper bar and a first end part of the negative electrode post copper bar, a second end part of the positive electrode post copper bar and a second end part of the negative electrode post copper bar are connected with a shell of a battery cell in the battery pack outside the shell, and the shape of the shell is configured to be the same as that of the shell of the battery cell in the battery pack. The utility model can ensure that the battery pack can play a role in protecting local loop short circuit and in-module short circuit.

Description

Fuse assembly for battery pack and battery pack

Technical Field

The utility model relates to the field of power batteries, in particular to a fuse assembly for a battery pack and the battery pack.

Background

With the high-speed development of new energy, the application field of the battery pack is wider and wider, and the battery pack is used as a main power source of the new energy. Because the battery pack is installed in the equipment, the installation and the disassembly are complex, and once the problem of short circuit or overcurrent occurs to a single battery core or a plurality of battery cores in a certain local loop or a single module, the risk of damage to the whole battery pack can be increased. In the prior art, a fuse is arranged to solve the problem of short circuit or overcurrent of a battery pack, but the fuse in the power battery pack is positioned in a high-voltage distribution box of the battery pack, so that the fuse plays a role in short circuit protection of a high-voltage main loop, and when a local loop in the battery pack or a single module fails in short circuit, the fuse cannot play a role in protection.

Disclosure of Invention

The utility model aims to provide a fuse assembly for a battery pack and the battery pack, so that the battery pack can protect local loop short circuits and intra-module short circuits.

The aim of the utility model is achieved by adopting the following technical scheme. According to the fuse assembly for the battery pack, which is provided by the utility model, the fuse assembly comprises a fuse, a shell, a negative electrode post copper bar and a positive electrode post copper bar, wherein the fuse is arranged in the shell and is connected with the first end part of the positive electrode post copper bar and the first end part of the negative electrode post copper bar, the second end part of the positive electrode post copper bar and the second end part of the negative electrode post copper bar are connected with the shell of a battery cell in the battery pack outside the shell, and the shape of the shell is configured to be the same as that of the shell of the battery cell in the battery pack.

In some embodiments, the pyrolysis bin comprises a rotary screen, the fuse assembly further comprises a heat dissipation mechanism disposed inside the housing and having a first end in abutment with one of the fuse, the negative pole copper bar, and the positive pole copper bar, and a second end in abutment with an inner surface of the housing.

In some embodiments, the first end of the heat dissipation mechanism is in contact with the fuse.

In some embodiments, the heat dissipation mechanism includes a heat dissipation member and a heat conduction member, a first end of the heat dissipation member is in abutment with one of the fuse, the negative electrode post copper bar, and the positive electrode post copper bar, and a second end of the heat dissipation member is in abutment with the first end of the heat conduction member.

In some embodiments, the second end of the thermally conductive member abuts an inner surface of the housing.

In some embodiments, the thermally conductive member is a thermally conductive adhesive or a thermally conductive film.

In some embodiments, the fuse is fixedly connected with the first end of the positive electrode post copper bar and the first end of the negative electrode post copper bar through screw threads.

In some embodiments, the housing is the same size as the outer shell of the cells within the battery pack.

The utility model also provides a battery pack comprising the fuse assembly for the battery pack.

In some embodiments, the cells within the battery pack are square or cylindrical

The beneficial effects of the utility model at least comprise:

1. according to the utility model, the fuse is arranged in the shell and is connected with the first end part of the positive electrode pole copper bar, the first end part of the negative electrode pole copper bar and the second end part of the positive electrode pole copper bar, and the second end part of the negative electrode pole copper bar are connected with the shell of the battery cell in the battery pack outside the shell, and the shape of the shell is configured to be the same as the shape of the shell of the battery cell in the battery pack, so that the fuse component can replace any primary battery cell in the battery pack, and the fuse component can be used as a local loop and a fuse of a single module, so that the battery pack can play a role in protecting the local loop from short circuit and the module from short circuit, and the safety of the battery pack is improved.

2. The fuse assembly is arranged in the shell through the heat dissipation mechanism, the first end of the heat dissipation mechanism is abutted against one of the fuse, the negative electrode pole copper bar and the positive electrode pole copper bar, and the second end of the heat dissipation mechanism is abutted against the inner surface of the shell, so that heat of the fuse is conducted to the shell through the heat dissipation mechanism, the heat of the fuse body is greatly reduced, and the service life of the fuse is prolonged.

The foregoing description is only an overview of the present utility model, and is intended to be implemented in accordance with the teachings of the present utility model, as well as the preferred embodiments thereof, together with the following detailed description of the utility model given in conjunction with the accompanying drawings.

Drawings

Fig. 1 is a schematic structural view of a fuse assembly for a battery pack according to an embodiment of the present utility model.

Detailed Description

In order to further explain the technical means of the present utility model, the following describes a fuse assembly for a battery pack and a specific embodiment of the battery pack according to the present utility model in detail with reference to the accompanying drawings and preferred embodiments. The following examples are only for more clearly illustrating the technical solution of the present utility model, and therefore are only exemplary and are not intended to limit the scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the term "comprising" in the description of the present application and the claims and in the description of the figures above, and any variants thereof.

As shown in fig. 1, the fuse assembly for a battery pack according to the present utility model includes a fuse 1, a housing 2, a negative electrode post copper bar 3 and a positive electrode post copper bar 4, wherein the negative electrode post copper bar 3 and the positive electrode post copper bar 4 are configured in an L shape, a first end of the negative electrode post copper bar 3 and a first end of the positive electrode post copper bar 4 are disposed inside the housing 2, a second end of the negative electrode post copper bar 3 and a second end of the positive electrode post copper bar 4 are disposed outside the housing 2, the fuse 1 is disposed inside the housing 2, a right end of the fuse 1 is connected to the first end of the positive electrode post copper bar 4, and a left end of the fuse 1 is connected to the first end of the negative electrode post copper bar 3. The second end of the positive electrode post copper bar 4 and the second end of the negative electrode post copper bar 3 are both connected with the outer shell of the battery pack inner cell outside the shell 2, and the shape of the shell 2 is configured to be the same as the shape of the outer shell of the battery pack inner cell.

According to the utility model, the fuse 1 is arranged in the shell 2 and is connected with the first end part of the positive electrode pole copper bar 4, the first end part of the negative electrode pole copper bar 3, the second end part of the positive electrode pole copper bar 4 and the second end part of the negative electrode pole copper bar 3 are connected with the shell of the battery pack inner battery core outside the shell 2, and the shape of the shell 2 is configured to be the same as the shape of the shell of the battery pack inner battery core, so that the fuse component can replace any primary battery core in the battery pack, and can be used as a local loop and a fuse of a single module, and the battery pack can play a role in protecting the local loop and the module inner short circuit. When the local loop or the module is internally provided with abnormal short circuit or large current with thermal runaway parameters, the fuse 1 of the fuse assembly can be timely fused, so that the high-voltage loop is opened, and the safety of the battery pack is improved.

In one or more embodiments, the fuse assembly of the present utility model further includes a heat dissipation mechanism 5, where the heat dissipation mechanism 5 is disposed inside the housing 2, and a first end of the heat dissipation mechanism 5 is abutted with one of the fuse 1, the negative electrode post copper bar 3 and the positive electrode post copper bar 4, and a second end of the heat dissipation mechanism 5 is abutted with an inner surface of the housing 2, so that heat of the fuse 1 is conducted to the housing 2 through the heat dissipation mechanism 5, so that heat of a body of the fuse 1 is greatly reduced, and service life is prolonged.

In a preferred embodiment, the first end of the heat dissipation mechanism 5 is directly contacted with the fuse 1, and the second end of the heat dissipation mechanism 5 is abutted against the inner surface of the housing 2, so that the heat of the fuse 1 can be directly conducted to the housing 2 through the heat dissipation mechanism 5, and the heat dissipation efficiency of the body of the fuse 1 is further improved.

In one or more embodiments, the heat dissipation mechanism 5 includes a heat dissipation member 51 and a heat conduction member 52, and the heat dissipation member 51 is made of a metal material and is configured in an L-shape to increase a heat dissipation area. The first end of the heat sink 51 is in contact with one of the fuse 1, the negative electrode post copper bar 3 and the positive electrode post copper bar 4, and the second end of the heat sink 51 is in contact with the first end of the heat conductor 52, and the second end of the heat conductor 52

Abutting against the inner surface of the housing 2. The heat conductive member 52 may be a heat conductive adhesive or a heat conductive film.

In one or more embodiments, the fuse 1 is fixedly connected to the first end of the positive electrode post copper bar 4 and the first end of the negative electrode post copper bar 3 through screw members. The second end part of the positive electrode pole copper bar 4 and the second end part of the negative electrode pole copper bar 3 are fixedly connected with the shell of the electric core in the battery pack.

0 in one or more embodiments, the dimensions of the housing 2 are the same as the dimensions of the outer shell of the cells within the battery pack.

The utility model also provides a battery pack, which comprises the fuse assembly for the battery pack, wherein the battery cells in the battery pack can be square or cylindrical.

The previous description of the disclosed aspects is provided to enable any person skilled in the art to practice the utility model 5. Various modifications to these aspects will be readily apparent to those skilled in the art,

and the generic principles defined herein may be applied to other aspects without departing from the scope of the utility model. Thus, the present utility model is not intended to be limited to the aspects shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuse subassembly for battery package, its characterized in that includes fuse, casing, negative pole post copper bar and positive pole post copper bar, wherein, the fuse set up in the inside of casing and with the first tip of positive pole post copper bar the first tip of negative pole post copper bar all is connected, the second tip of positive pole post copper bar and the second tip of negative pole post copper bar all is in the outside of casing is connected with the shell of battery package inner cell, the shape of casing is constructed the same with the shape of the shell of battery package inner cell.

2. The fuse assembly for a battery pack according to claim 1, further comprising a heat dissipation mechanism disposed inside the housing with a first end of the heat dissipation mechanism abutting one of the fuse, the negative electrode post copper bar, and the positive electrode post copper bar and a second end of the heat dissipation mechanism abutting an inner surface of the housing.

3. The fuse assembly for a battery pack of claim 2, wherein the first end of the heat dissipation mechanism is in contact with the fuse.

4. The fuse assembly for a battery pack of claim 2, wherein the heat dissipation mechanism comprises a heat dissipation member and a thermally conductive member, a first end of the heat dissipation member being in abutment with one of the fuse, the negative electrode post copper bar, and the positive electrode post copper bar, and a second end of the heat dissipation member being in abutment with the first end of the thermally conductive member.

5. The fuse assembly for a battery pack of claim 4, wherein the second end of the thermally conductive member abuts an inner surface of the housing.

6. The fuse assembly for a battery pack according to claim 4, wherein the heat conductive member is a heat conductive adhesive or a heat conductive film.

7. The fuse assembly for a battery pack of claim 1, wherein the fuse is fixedly connected to the first end of the positive electrode post copper bar and the first end of the negative electrode post copper bar by a screw.

8. The fuse assembly for a battery pack of claim 1, wherein the housing has the same dimensions as the outer housing of the cells within the battery pack.

9. A battery pack comprising the fuse assembly for a battery pack according to any one of claims 1 to 8.

10. The battery pack of claim 9, wherein the cells within the battery pack are square or cylindrical.