CN107425153A - Battery module - Google Patents

Abstract

The present invention provides a battery module group, comprising: a plurality of battery cells arranged in sequence along the arrangement direction to form a battery pack; a fixing belt encircling the end surfaces on both sides of the battery pack along the arrangement direction and the side surfaces on both sides along the width direction, so as to The plurality of battery units are fixed together; each battery unit has grooves on both sides of the width direction, the grooves of the plurality of battery units form a fixing channel for the battery pack, and the fixing belt is looped around the side of the battery pack Some of them are contained in fixed passages. The fixing belt wraps around the outside of the battery pack to hold the battery units that make up the battery pack tightly, avoiding the shifting and sliding of the battery units when they are impacted, and improving the structural strength of the battery module; because part of the fixing belt is accommodated in the fixing channel, the occupancy is reduced The space improves the integration of the battery module and the connection strength between the fixing strap and the battery pack, prevents the fixing strap from falling off the battery pack, and also reserves a fixed structure and heat dissipation interface for the battery module to connect with the outside.

Description

battery module

technical field

The invention relates to the field of batteries, in particular to a battery module.

Background technique

The structure of the pouch battery module mainly includes the battery module unit, the fixing structure, the heat dissipation structure and the electrical connection structure. At present, the fixed structure of most pouch battery modules highlights the main body of the module with a single feature, and the volumetric energy density of the module is low, which is not conducive to improving the integration of the battery system. There are also some battery modules that use a module frame composed of separate end plates and side plates to fix the battery module. This type of battery module has a complex structure and a large number of parts, which is not conducive to improving the energy density of the battery module. .

At the same time, the pouch battery produces a lot of heat. While considering the module fixing, it is necessary to consider the thermal management of the battery module at the same time.

Contents of the invention

In view of the problems in the background technology, the purpose of the present invention is to provide a battery module, which can improve the structural strength and integration of the battery module itself.

Another object of the present invention is to provide a battery module, which does not require a module frame composed of separate end plates and side plates, thereby simplifying the structure and reducing the number of parts, which is beneficial to improving the energy density of the battery module.

In order to achieve the above object, the present invention provides a battery module, which includes: a plurality of battery cells arranged in sequence along the arrangement direction to form a battery pack; The side surfaces on both sides are used to fix the plurality of battery units together; wherein, the side surfaces of each battery unit along the width direction have grooves, and the grooves of the plurality of battery units form a fixing channel for the battery pack, and The portion of the fixing belt that wraps around the side of the battery pack is accommodated in the fixing channel.

The beneficial effects of the present invention are as follows:

In the battery module according to the present invention, the fixing belt surrounds the outside of the battery pack, so that the multiple battery units that make up the battery pack can be hugged tightly, preventing the battery units from shifting and sliding when they are impacted, and improving the safety of the battery module itself. Structural strength; since part of the fixing belt is accommodated in the fixing channel, it reduces the space occupied by the battery module and improves the integration of the battery module. In addition, the fixing channel can also improve the connection strength between the fixing belt and the battery pack, avoiding the need for the fixing belt It falls off from the battery pack; at the same time, the space occupied by the fixing belt is small, and it can also reserve a fixed structure and a heat dissipation interface for the battery module to connect with the outside. In addition, in the battery module according to the present invention, there is no need to use a module frame composed of separate end plates and side plates, thereby simplifying the structure and reducing the number of parts, which is beneficial to improving the energy density of the battery module.

Description of drawings

1 is a perspective view of a battery module according to the present invention;

2 is a perspective view of a battery unit of a battery module according to the present invention;

3 to 6 are perspective views of different embodiments of the fixing strap of the battery module according to the present invention.

Wherein, the reference signs are explained as follows:

1 battery unit M battery pack

11 Cooling plate P fixed channel

12 cells S groove

13 Fixing frame C connector

14 Connecting hole D Arrangement direction

2 Fixing belt W width direction

21 Connecting part L longitudinal direction

detailed description

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

Referring to FIGS. 1 to 6 , the battery module according to the present invention includes: a plurality of battery cells 1 arranged sequentially along the arrangement direction D to form a battery pack M; and the side surfaces on both sides along the width direction W, so as to fix the plurality of battery units 1 together; wherein, each battery unit 1 has a groove S on the side surfaces on both sides along the width direction W, and the plurality of battery units 1 The groove S forms a fixing channel P of the battery pack M, and the portion of the fixing band 2 surrounding the side of the battery pack M is accommodated in the fixing channel P.

In the battery module according to the present invention, the fixing belt 2 surrounds the outside of the battery pack M, so that the plurality of battery units 1 forming the battery pack M can be tightly hugged to prevent the battery units 1 from shifting and sliding when they are impacted, thereby improving the battery life. The structural strength of the battery module itself; since part of the fixing belt 2 is accommodated in the fixing channel P, the space occupied by the battery module is reduced, and the integration of the battery module is improved. In addition, the fixing channel P can also improve the connection between the fixing belt 2 and the The connection strength of the battery pack M prevents the fixing band 2 from falling off from the battery pack M; at the same time, the fixing band 2 occupies a small space, and can also reserve a fixing structure and a heat dissipation interface for the battery module to be connected to the outside. In addition, in the battery module according to the present invention, there is no need to use a module frame composed of separate end plates and side plates, thereby simplifying the structure and reducing the number of parts, which is beneficial to improving the energy density of the battery module.

In an embodiment of the battery module according to the present invention, referring to FIG. 2, each battery unit 1 includes: a heat dissipation plate 11; a single battery 12, at least one end surface along the arrangement direction D is fixed on the heat dissipation plate 11; and two There are two fixing frames 13, and the cooling plate 11 and the battery unit 1 are clamped between the two fixing frames 13.

In an embodiment of the battery module according to the present invention, referring to FIG. 2 , a part of the cooling plate 11 is located outside the corresponding fixing frame 13 along the width direction W. Referring to FIG.

In an embodiment of the battery module according to the present invention, referring to FIG. 2 , the groove S of each battery unit 1 is formed on the side of the fixing frame 13 of each battery unit 1 along the width direction W. Referring to FIG. Since the portion of the side of the fixing frame 13 along the width direction W is covered by the heat dissipation plate 11 , the groove S is formed in a portion of the fixing frame 13 not covered by the heat dissipation plate 11 .

In an embodiment of the battery module according to the present invention, referring to FIG. 2 , the groove S of each battery unit 1 is formed on the outer side of the cooling plate 11 of each battery unit 1 located on the outer side of the corresponding fixing frame 13 along the width direction W. partly on. The fixing belt 2 wraps around the groove S of the heat sink 11 , occupies a small space and does not affect the normal heat dissipation of the heat sink 11 .

In an embodiment of the battery module according to the present invention, there is one fixing band 2 , which is fixed at the center of the battery pack M along the length direction L. As shown in FIG.

In an embodiment of the battery module according to the present invention, referring to FIG. 2 , there are multiple fixing straps 2 , and each fixing strap 2 is symmetrical to the center of the battery pack M along the length direction L. As shown in FIG. The symmetrical structure can improve the overall stability of the battery module.

In an embodiment of the battery module according to the present invention, referring to FIG. 3 to FIG. 5 , the fixing band 2 is an integral strip structure.

In an embodiment of the battery module according to the present invention, referring to FIG. 3 to FIG. 5 , the fixing belt 2 surrounds the rear end of the battery pack M and is fixedly connected.

In an embodiment of the battery module according to the present invention, the fixing band 2 is made of metal; referring to FIG. 3 , the first end of the fixing band 2 is fixed by welding. The welding can be laser welding or ultrasonic welding.

In an embodiment of the battery module according to the present invention, the fixing band 2 is made of plastic; referring to FIG. 3 , the beginning and the end of the fixing band 2 are fixed by thermocompression.

In an embodiment of the battery module according to the present invention, referring to FIG. 4 , the first end of the fixing belt 2 is fixed by buckle connection. The assembly process of this method is simple and the assembly efficiency is high.

In an embodiment of the battery module according to the present invention, referring to FIG. 5 , the first end of the fixing band 2 is bent to form a connecting portion 21 ; correspondingly, the first end of the fixing band 2 is fixed by bolts. Although the bolted connection method is cumbersome in the assembly process, the process requirements are low.

In an embodiment of the battery module according to the present invention, referring to FIG. 6 , the fixing belt 2 is formed by connecting a plurality of strip structures.

In an embodiment of the battery module according to the present invention, referring to FIG. 6 , adjacent strip structures are fixed together by welding, buckle connection or bolt connection.

In an embodiment of the battery module according to the present invention, referring to FIG. 1 and FIG. 2 , the corner of the battery unit 1 has a connection hole 14 through which the connector C passes to fix the battery module to an external box. body.

In an embodiment of the battery module according to the present invention, referring to FIG. 1 , the portion of the fixing belt 2 accommodated in the fixing channel P does not protrude from the fixing channel P. Referring to FIG. The side surfaces on both sides of the battery unit 1 along the width direction W are to be connected or contacted with external components (for example, external heat dissipation pipes or other heat dissipation components). , Therefore, the fixing band 2 does not interfere with external components.

In an embodiment of the battery module according to the present invention, the single battery 12 is a pouch battery.

Claims (10)

1. a kind of battery modules, including：

Multiple battery units (1), it is sequentially arranged along orientation (D) to form battery pack (M)；

Characterized in that,

The battery modules also include：

Fixing band (2), around end face of the battery pack (M) along orientation (D) both sides and along width The side of direction (W) both sides, the multiple battery unit (1) is fixed together；

The side of each battery unit (1) (W) both sides in the width direction has groove (S), described more The groove (S) of individual battery unit (1) forms the fixation passage (P) of battery pack (M), and fixed Band (2) is looped around the partial receipt of the side of battery pack (M) in fixed passage (P).

2. battery modules according to claim 1, it is characterised in that each battery unit (1) includes：

Heat sink (11)；

Cell (12), at least it is fixed on heat sink (11) along an end face of orientation (D) On；And

Two fixed mounts (13), heat sink (11) and battery unit (1) are clamped in two fixations Between frame (13).

3. battery modules according to claim 2, it is characterised in that one of heat sink (11) Point positioned at the outside of corresponding fixed mount (13) (W) in the width direction.

4. battery modules according to claim 3, it is characterised in that

The groove (S) of each battery unit (1) is formed at the fixed mount (13) of each battery unit (1) In the width direction on the side of (W)；And/or

The groove (S) of each battery unit (1) is formed at the heat sink (11) of each battery unit (1) Positioned at corresponding fixed mount (13) in the width direction on the part in the outside of (W).

5. battery modules according to claim 1, it is characterised in that fixing band (2) is integrated List structure.

6. battery modules according to claim 5, it is characterised in that fixing band (2) is around battery Group (M) is fixedly connected at first and last end afterwards.

7. battery modules according to claim 6, it is characterised in that

Fixing band (2) is made of metal, and the first and last end of fixing band (2) is by being welded and fixed；Or

Fixing band (2) is made of plastics, and the first and last end of fixing band (2) is fixed by hot pressing connects； Or

The first and last end of fixing band (2) is by snapping connection fixation；Or

The first and last end of fixing band (2) is bent to form connecting portion (21), and the first and last end of fixing band (2) It is bolted fixation.

8. battery modules according to claim 1, it is characterised in that fixing band (2) is by multiple List structure is formed by connecting.

9. battery modules according to claim 1, it is characterised in that the corner of battery unit (1) With connecting hole (14), worn for connector (C) so that the battery modules to be fixed to outside case Body.

10. battery modules according to claim 1, it is characterised in that fixing band (2) is housed in Part in fixed passage (P) does not protrude from fixed passage (P).