CN215008393U

CN215008393U - Battery module and battery pack

Info

Publication number: CN215008393U
Application number: CN202121031369.0U
Authority: CN
Inventors: 潘芳芳; 关俊山; 谷亮杰; 颜廷露; 张勇杰; 郭其鑫
Original assignee: CALB Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-12-03
Anticipated expiration: 2031-05-14

Abstract

The utility model provides a battery module and battery package belongs to battery technical field. The battery module comprises a plurality of batteries which are arranged along a first direction; a side plate disposed at one side of the plurality of batteries; the fixing piece is a bus bar or an end plate, and the fixing piece is connected with the side plate in a clamping mode. The battery module that this disclosure provided carries out the block through busbar or end plate and fixes the curb plate, and fixed mode is simple and application scope is wide.

Description

Battery module and battery pack

Technical Field

The present disclosure relates to the field of battery technologies, and in particular, to a battery module and a battery pack.

Background

The battery module includes a plurality of batteries, bus bars, and end plates or side plates for fixing the batteries.

In the prior art, the side plates are usually fixed by welding, such as welding with the end plates. However, the welding method is not applicable to all side plates, and when the side plates are made of a material such as hard rubber, the side plates cannot be fixed by the welding method.

The above information disclosed in the background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not constitute prior art that is known to a person of ordinary skill in the art.

SUMMERY OF THE UTILITY MODEL

An object of this disclosure is to provide a battery module and battery package, carry out the block through busbar or end plate and fix the curb plate, fixed mode is simple and application scope is wide.

In order to achieve the purpose, the following technical scheme is adopted in the disclosure:

according to a first aspect of the present disclosure, there is provided a battery module including:

a plurality of batteries arranged in a first direction;

a side plate disposed at one side of the plurality of batteries;

the fixing piece is a bus bar or an end plate, and the fixing piece is connected with the side plate in a clamping mode.

According to a second aspect of the present disclosure, there is provided a battery pack including the battery module of the first aspect.

The battery module that this disclosure provided includes a plurality of batteries, curb plate and mounting. The side plate is arranged on one side of the batteries. The fixing piece is a bus bar or an end plate, and the fixing piece is connected with the side plate in a clamping mode. This openly adopts busbar or end plate to carry out the block to the curb plate fixed, and this mode is applicable to the curb plate of any material, and to the curb plate that is not suitable for the welding material, need not to set up extra mounting and can fix the curb plate, the battery module that this disclosure provided, the fixed knot of its curb plate constructs simply and application scope is wide.

Drawings

The above and other features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

Fig. 1 is a schematic view of a battery module structure in an exemplary embodiment of the present disclosure;

FIG. 2 is a cross-sectional view of a side plate in an exemplary embodiment of the present disclosure;

FIG. 3 is a cross-sectional view of a side plate in another exemplary embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a side plate in yet another exemplary embodiment of the present disclosure;

FIG. 5 is a front view of a side panel in an exemplary embodiment of the present disclosure;

FIG. 6 is a front view of a side panel in another exemplary embodiment of the present disclosure;

FIG. 7 is a schematic view of a clamping structure of an end plate and a side plate in an exemplary embodiment of the disclosure;

FIG. 8 is a schematic view of a clamping structure of an end plate and a side plate in another exemplary embodiment of the disclosure;

FIG. 9 is a schematic view of an end plate and side plate snap-fit arrangement according to yet another exemplary embodiment of the present disclosure;

FIG. 10 is a schematic view of a clamping structure of an end plate and a side plate in yet another exemplary embodiment of the disclosure;

FIG. 11 is a schematic view of an end plate and side plate snap-fit arrangement in yet another exemplary embodiment of the present disclosure;

FIG. 12 is a cross-sectional view of a securing tie in an exemplary embodiment of the present disclosure;

fig. 13 is a schematic view of an end plate structure in an exemplary embodiment of the present disclosure.

The reference numerals of the main elements in the figures are explained as follows:

100-a battery; 200-a busbar; 300-side plate; 310-a first boss; 320-a second boss; 330-a first groove; 340-a second clamping part; 300 a-side plate body; 300 b-a bent part; 400-end plate; 410-a first snap-in portion; 411-a first card interface; 412-a second bayonet surface; 413-a third clamping surface; 420-a second groove; 500-fixing the binding tape; 510-ribs.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure.

In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.

The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the embodiments of the disclosure can be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring the primary technical ideas of the disclosure.

When a structure is "on" another structure, it may mean that the structure is integrally formed with the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure via another structure.

The terms "a," "an," "the," and the like are used to denote the presence of one or more elements/components/parts; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc. The terms "first" and "second", etc. are used merely as labels, and are not limiting on the number of their objects.

As shown in fig. 1 to 4, the present disclosure provides a battery module including a plurality of batteries 100, a side plate 300, and a fixing member. Wherein the plurality of batteries 100 are arranged in a first direction; the side plate 300 is disposed at one side of the plurality of batteries 100; the fixing member is the bus bar 200 or the end plate 400, and the fixing member is engaged with the side plate 300.

The present disclosure provides a battery module including a plurality of batteries 100, a side plate 300, and a fixing member. The side plate 300 is disposed at one side of the plurality of batteries 100. The fixing member is the bus bar 200 or the end plate 300, and the fixing member is connected with the side plate 300 in a clamping manner. This is disclosed to adopt busbar 200 or end plate 400 to carry out the block to fixed to curb plate 300, and this mode is applicable to the curb plate 300 of any material, and to the curb plate 300 that is not suitable for the welding material, need not to set up extra mounting and can fix curb plate 300, the battery module that this disclosure provided, its curb plate 300's fixed knot simple structure and application scope are wide.

Each component of the battery module according to the embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

In some embodiments, the bus bar 200 is disposed on a side surface of the plurality of cells 100, the side surface being a surface parallel to the first direction. The side plate 300 and the bus bar 200 are disposed on the same side of the plurality of batteries, and the side plate 300 is disposed on a side of the bus bar 200 away from the plurality of batteries 100.

The plurality of cells 100 are arranged in a first direction and electrically connected to form a single body. The first direction is the X direction in the figure. The bus bar 200 is provided on a side surface of the plurality of cells 100, the side surface being a surface parallel to the first direction. The bus bar 200 serves as a current conducting medium to electrically connect the plurality of cells 100. In some embodiments, the sides are the planes formed by the height and width of the battery 100. The length of the battery 100 refers to the side parallel to the Y direction in fig. 1, the width refers to the side parallel to the X direction, and the height refers to the side parallel to the Z direction. Wherein the width and height of the battery 100 are both less than the length of the battery 100. For example, when the battery 100 is generally rectangular parallelepiped in its entirety, the battery 100 includes two large faces and four small faces, the length and height of the battery 100 forming the large faces, the height and width of the battery 100, and the length and width of the battery 100 forming the other small faces. The area of the large face is larger than the area of the other small faces.

In one embodiment, the length of the cell 100 is a, 400mm a 2500mm, the width of the cell 100 is b, the height of the cell 100 is c, 2c a 50c, and/or 0.5b c 20 b.

Furthermore, c is more than or equal to 50mm and less than or equal to 200mm, and b is more than or equal to 10mm and less than or equal to 100 mm.

Preferably, 4 c.ltoreq.a.ltoreq.25 c, and/or 2 b.ltoreq.c.ltoreq.10 b.

In the battery 100 of the above embodiment, the ratio of the length to the height of the battery 100 is large, and further, the ratio of the height to the width of the battery 100 is large, while ensuring sufficient energy density.

In one embodiment, the length of the battery 100 is a, the height of the battery is c, and a is greater than or equal to 4c and less than or equal to 7c, i.e., the ratio of the length to the height of the battery is greater in this embodiment, so as to increase the energy density of the battery and facilitate the subsequent formation of a battery module.

In one embodiment, the width of the battery is b, c is more than or equal to 3b and less than or equal to 7b, and the ratio of the height to the width of the battery is larger, so that the battery is conveniently formed under the condition of ensuring enough energy density.

Alternatively, the length of the cell may be 500mm to 1500mm, the height of the cell may be 80mm to 150mm, and the width of the cell may be 15mm to 25 mm.

In some embodiments, a side surface of the side plate 300 near the bus bar 200 is provided with a first protrusion 310 and a second protrusion 320, and an accommodation space for accommodating the bus bar 200 is formed between the first protrusion 310 and the second protrusion 320. Specifically, there is a space between the first and

second protrusions

310 and 320, and the space forms the above-mentioned receiving space. The size of the gap is set according to the size of the bus bar 200 so that the bus bar 200 is stably engaged between the first and

second protrusions

310 and 320. The above design has certain fixing and limiting effects on the side plate 300, and prevents the side plate 300 from shifting in the process of shaking 100. In addition, the bus bar 200 may be connected to the side plate 300 by other means such as gluing.

As shown in fig. 2 and 3, in some embodiments, the first and

second bosses

310, 320 may be stamped and formed from the side plate 300. Specifically, a side surface of the first protrusion 310 away from the plurality of batteries 100 is recessed toward the plurality of batteries 100, while a side surface of the first protrusion 310 close to the plurality of batteries 100 is raised toward the plurality of batteries 100, a side surface of the second protrusion 320 away from the plurality of batteries 100 is recessed toward the plurality of batteries 100, while a side surface of the second protrusion 320 close to the plurality of batteries 100 is raised toward the plurality of batteries 100.

As shown in fig. 4, in other embodiments, the first protruding portion 310 and the second protruding portion 320 may be additionally disposed on the side plate 300 through other processes, and specifically, the first protruding portion 310 and the second protruding portion 320 may be ribs welded or bonded on the side plate 300, or may be directly formed on a side surface of the side plate 300 near the plurality of batteries 100 through a grinding tool or the like. The positions of the first and

second protrusions

310 and 320 on the side plate 300 are specifically designed according to the positions of the bus bars 200 on the plurality of batteries 100, and the disclosure is not limited thereto.

As shown in fig. 1, in some embodiments of the present disclosure, an end plate 400 is disposed at an end surface of the plurality of cells 100. The end surface is a surface perpendicular to the first direction. In some embodiments, the end faces are long and tall forming surfaces of the battery 100. The number of the end plates 400 is two, respectively located at both ends of the plurality of cells 100. The end plate 400 and the side plate 300 fix a plurality of cells 100, respectively, from different directions.

In some embodiments, one end of the end plate 400 close to the side plate 300 is provided with a first clamping portion 410, and one end of the side plate 300 close to the end plate 400 is provided with a second clamping portion 340 for clamping with the first clamping portion 410. The end plate 400 and the side plate 300 are engaged with each other by the first engaging portion 410 and the second engaging portion 340, so that the end plate 400 and the side plate 300 are prevented from being dislocated when the battery module or the battery 100 is wrapped.

As shown in fig. 7 to 10, in some embodiments, the first clamping portion 410 includes a clamping surface for clamping with the second clamping portion 340, and the shapes of the second clamping portion 340 and the first clamping portion 410 are matched to complete the clamping of the second clamping portion 340 and the first clamping portion 410. The clamping surfaces include a first clamping surface 411 and a second clamping surface 412, the second clamping surface 412 is connected with one end of the first clamping surface 411, an orthographic projection of the first clamping surface 411 on a first plane is a line or a plane, an orthographic projection of the second clamping surface 412 on the first plane is a plane, and the first plane is a plane of the surface of the end plate 400 close to the plurality of batteries 100. The first and second chucking surfaces 411 and 412 may be curved surfaces or flat surfaces.

As shown in fig. 7, in an embodiment, the first latching surface 411 and the second latching surface 412 are both planar, and a first included angle is formed between the first latching surface 411 and the second latching surface 412, and the first included angle is greater than 0 ° and smaller than 180 °. An orthogonal projection of the first chucking surface 411 on the first plane is a plane or a line, and an orthogonal projection of the second chucking surface 412 on the first plane is a plane. When the orthographic projection of the first clamping surface 411 on the first plane is a line, the first clamping surface 411 and the second clamping surface 412 are approximately perpendicular. The above-described design realizes the limit of the end plate 400 and the side plate 300 in the Z direction.

As shown in fig. 8, in another embodiment, the first clamping surface 411 is a curved surface, the second clamping surface 412 is a flat surface, an orthogonal projection of the first clamping surface 411 on the first flat surface is a flat surface, and an orthogonal projection of the second clamping surface 412 on the first flat surface is a flat surface.

As shown in fig. 9 and 10, in some embodiments, the clamping surface further includes a third clamping surface 413, the third clamping surface 413 is connected to the other end of the second clamping surface 412, and an orthogonal projection of the third clamping surface 413 on the first plane is a line or a plane. The third clamping surface 413 may be a curved surface or an inclined surface.

As shown in fig. 9, in an embodiment, the third clamping surface 413 is a plane, and a first included angle is formed between the third clamping surface 413 and the second clamping surface 412, and the first included angle is greater than 0 ° and smaller than 180 °. In a preferred embodiment, the first included angle between the third clamping surface 413 and the second clamping surface 412 is about 90 °. The orthographic projection of the third clamping surface 413 on the first plane is a plane or a line, and when the orthographic projection of the third clamping surface 413 on the first plane is a line, the third clamping surface 413 and the second clamping surface 412 are approximately perpendicular.

As shown in fig. 10, in another embodiment, the third clamping surface 413 is a plane, the second clamping surface 412 is a plane, an orthogonal projection of the third clamping surface 413 on the first plane is a plane, and an orthogonal projection of the second clamping surface 412 on the first plane is a plane.

In some embodiments, one of the first and

second clamping portions

410 and 340 is a card slot, and the other is a card protrusion for being inserted into the card slot. The groove wall of the clamping groove can be a curved surface or a plane. In one embodiment, as shown in fig. 11, the slot is a curved slot, and correspondingly, the protrusion is a curved protrusion. In other embodiments, the groove wall of the clamping groove is a plane, and correspondingly, the surface of the clamping protrusion is also a plane. Specifically, as shown in fig. 9 and 10, the second engaging portion 340 is a slot, and the first engaging portion 410 is a protrusion.

As shown in fig. 1 to 4, in some embodiments of the present disclosure, the battery module further includes a fixing band 500, and the fixing band 500 is used to fix the side plate 300 and the plurality of batteries 100. The fixing band 500 is disposed at a side of the side plate 300 away from the plurality of batteries 100, and a first groove 330 for fixing the fixing band 500 is disposed at a side surface of the side plate 300 close to the fixing band 500. Further, as shown in fig. 5 and 6, the first groove 330 extends in the front and rear end direction of the side plate 300 and penetrates the front and rear ends of the side plate 300, preventing the fixing band 500 from shaking.

As shown in fig. 2-4, in some embodiments, the first recess 330 is stamped and formed from the side plate 300. The side surface of the first groove 330 away from the plurality of batteries 100 is recessed toward the plurality of batteries 100, while the side surface of the first groove 330 toward the plurality of batteries 100 is raised toward the plurality of batteries 100.

As shown in fig. 2, in some embodiments, the first recess 330 may be the same component as the first boss 310 or the second boss 320. When the first protruding portion 310 and the second protruding portion 320 are punched and formed by the side plate 300, a recess formed at a corresponding position of the first protruding portion 310 or the second protruding portion 320 is the second groove 420 for fixing the binding band 500, so as to simplify the process and improve the production efficiency.

As shown in fig. 3 and 4, in other embodiments, the first groove 330 is not the same as the first protrusion 310 or the second protrusion 320, and may be designed according to the position of the bus bar 200 and the fixing band 500 on the side plate 300.

As shown in fig. 12, in some embodiments of the present disclosure, a side surface of the fixing tie 500 near the side plate 300 is provided with a rib 510, and the rib 510 abuts in the first groove 330. In practice, the fixing band 500 is used to bind the end plate 400 and the side plate 300. Due to the installation requirements of other components within the battery module, in some cases, after the fixing band 500 binds the end plate 400 and the side plate 300, a certain gap may be generated between the fixing band 500 and the side plate 300. In this embodiment, through setting up protruding muscle 510 for protruding muscle 510 is located first recess 330, simultaneously with the surperficial butt of curb plate 300, thereby makes to produce pressure and frictional force between fixed ribbon 500 and the curb plate 300, avoids fixed ribbon 500 and curb plate 300 to produce the displacement.

As shown in fig. 1 to 4, in some embodiments of the present disclosure, the side plate 300 includes two side plate main bodies 300a and two bent portions 300b, two ends of the side plate main body 300a in the height direction are bent toward the plurality of batteries 100 and extend to form two bent portions 300b, and the plurality of batteries 100 are disposed between the two bent portions 300 b. The height direction is the Z direction in the figure. The bent portion 300b plays a certain role in fixing the plurality of batteries 100. The side plate 300 is generally an insulating plate, and the bent portions 300b at both ends of the side plate body 300a can enhance the insulation of the battery module, while increasing the creepage distance of the battery 100 or other metal members.

In some embodiments, the side plate 300 is an insulating plate. In the related art, a side plate in a battery module is generally made of metal, an outer surface of the side plate is provided with an insulating coating, and a bus bar is also generally made of a metal material. When the bus bar and the side plate are disposed on the same side, the bus bar easily scratches the insulating layer on the side plate, resulting in insulation failure. In this embodiment of the present disclosure, the side plate 300 is directly provided as an insulating plate, which solves the problem of insulation failure of the side plate in the related art. In this embodiment, the side plate 300 may be an insulating plate made of an insulating resin material, such as Polycarbonate (PC), polyethylene terephthalate (PET), or the like, or may be made of mica or other materials. Wherein, mica has excellent high temperature insulating property, and when the battery 100 is out of control due to heat, the mica side plate 300 can still maintain normal insulating property, thereby reducing the risk of out of control due to heat of the battery 100.

As shown in fig. 1 and 13, in some embodiments of the present disclosure, a side surface of the end plate 400 facing away from the plurality of cells 100 is provided with a second groove 420. The second recess 420 helps to reduce the weight of the end plate 400 to achieve a light weight. The number of the second grooves 420 may be plural, and may be specifically set according to the size of the end plate 400, and the shape and size of the second grooves 420 are not limited.

The present disclosure also provides a battery pack including the battery module according to any one of the above embodiments.

It is to be understood that the disclosure is not limited in its application to the details of construction and the arrangements of the components set forth in the specification. The present disclosure is capable of other embodiments and of being practiced and carried out in various ways. The foregoing variations and modifications are within the scope of the present disclosure. It should be understood that the disclosure disclosed and defined in this specification extends to all alternative combinations of two or more of the individual features mentioned or evident from the text and/or drawings. All of these different combinations constitute various alternative aspects of the present disclosure. The embodiments of this specification illustrate the best mode known for carrying out the disclosure and will enable those skilled in the art to utilize the disclosure.

Claims

1. A battery module, comprising:

a plurality of batteries arranged in a first direction;

a side plate disposed at one side of the plurality of batteries;

2. The battery module according to claim 1, wherein the bus bar is provided to a side surface of the plurality of cells, the side surface being a surface parallel to the first direction; the side plate and the bus bar are arranged on the same side of the plurality of batteries, and the side plate is arranged on one side of the bus bar far away from the plurality of batteries; the side plate is provided with a first protruding portion and a second protruding portion on the surface of one side close to the busbar, and the busbar is clamped between the first protruding portion and the second protruding portion.

3. The battery module according to claim 1, wherein the end plate is disposed on an end surface of the plurality of batteries, the end surface is a surface perpendicular to the first direction, a first clamping portion is disposed at an end of the end plate close to the side plate, and a second clamping portion for clamping with the first clamping portion is disposed at an end of the side plate close to the end plate.

4. The battery module according to claim 3, wherein the first clamping portion includes a clamping surface for clamping with the second clamping portion, the second clamping portion matches with the first clamping portion in shape, the clamping surface includes a first clamping surface and a second clamping surface, one end of the second clamping surface is connected with the first clamping surface, an orthographic projection of the first clamping surface is a line or a surface, an orthographic projection of the second clamping surface is a surface, and the first plane is a plane where the end plate is located near the surfaces of the plurality of batteries.

5. The battery module according to claim 3, wherein one of the first clamping portion and the second clamping portion is a clamping groove, and the other clamping portion is a clamping protrusion for being inserted into the clamping groove.

6. The battery module according to claim 1, further comprising:

the fixing bandage is arranged on one side, away from the side plates, of the batteries, the side plates are close to one side surfaces of the fixing bandage, and first grooves used for fixing the fixing bandage are formed in the side surfaces of the fixing bandage.

7. The battery module as set forth in claim 6, wherein a side surface of the fixing band adjacent to the side plate is provided with a rib abutting in the first groove.

8. The battery module according to claim 1, wherein the side plate includes two side plate main bodies and two bent portions, two ends of the side plate main body in the height direction are bent toward the plurality of batteries and extend to form the two bent portions, and the plurality of batteries are disposed between the two bent portions.

9. The battery module according to any one of claims 1 to 8, wherein the side plates are insulating plates.

10. A battery pack comprising the battery module according to any one of claims 1 to 9.