CN114094254A

CN114094254A - Battery module

Info

Publication number: CN114094254A
Application number: CN202011193122.9A
Authority: CN
Inventors: 畅志远; 杜肖源; 常利辉; 李欢飞; 郑立成
Original assignee: China Lithium Battery Technology Co Ltd
Current assignee: China Lithium Battery Technology Co Ltd
Priority date: 2020-06-11
Filing date: 2020-10-30
Publication date: 2022-02-25
Also published as: CN111640896A

Abstract

The invention relates to the technical field of batteries and provides a battery module. The battery module includes a plurality of battery cartridge assemblies; the reinforcing member, the laminating of reinforcing member is at the tip of a plurality of battery case subassemblies, and is connected with a plurality of battery case subassemblies, and wherein, when the battery case subassembly is whole to be the cuboid, including two big faces and four facet, the tip of battery case subassembly is the facet of battery case subassembly. The battery module is directly connected with the battery box component due to the reinforcing component, so that the connection strength of the battery box components is improved.

Description

Battery module

Technical Field

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

Background

The battery module includes a plurality of stacked battery cartridge assemblies, each of which includes a battery cartridge and a battery accommodated in the cartridge. The stack formed by the battery box assembly is provided with insulating end plates at both ends.

Because the insulating end plate is weak in strength and the connection fit errors at different levels, the connection strength is low, and the risk of structural failure exists under the working conditions of impact, vibration and the like.

Disclosure of Invention

The invention provides a battery module, which is used for improving the connection strength of a plurality of battery box assemblies.

The present invention provides a battery module, including:

a plurality of battery pack assemblies;

a reinforcement attached to end portions of the plurality of battery case assemblies and connected to the plurality of battery case assemblies,

when the battery box component is integrally a cuboid, the battery box component comprises two large faces and four small faces, and the end parts of the battery box component are the small faces of the battery box component.

The battery module of the embodiment of the invention realizes the connection of the plurality of battery box assemblies through the reinforcing member, and the reinforcing member is directly connected with the battery box assemblies, so that the connection strength of the plurality of battery box assemblies is improved.

Drawings

Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is an exploded schematic view of a battery module according to an exemplary embodiment;

FIG. 2 is a schematic view of an assembled structure of a battery module according to an exemplary embodiment;

fig. 3 is a schematic diagram illustrating a battery module with end plates removed according to an exemplary embodiment;

fig. 4 is a schematic diagram illustrating a battery module with end plates and insulation removed according to an exemplary embodiment;

fig. 5 is a schematic structural view illustrating a plurality of battery cartridge assemblies of a battery module according to an exemplary embodiment;

fig. 6 is an exploded schematic view of a plurality of battery cartridge assemblies and side plates and reinforcing members of a battery module according to an exemplary embodiment;

fig. 7 is a schematic structural view illustrating a reinforcing member of a battery module according to an exemplary embodiment;

FIG. 8 is a schematic view illustrating the construction of a cartridge assembly of a battery module according to an exemplary embodiment;

fig. 9 is a schematic structural view illustrating a battery cartridge assembly of a battery module according to another exemplary embodiment.

The reference numerals are explained below:

10. a side plate; 20. a reinforcement; 21. avoiding a space; 22. fixing the plate section; 23. a connecting plate section; 231. a first connector plate segment; 232. a second connector plate segment; 30. an end plate; 31. a third positioning part; 32. a fixing hole; 40. an insulating member; 41. a fourth positioning portion; 50. a collection assembly; 51. a third connecting portion; 60. a bus bar; 61. a fourth connecting portion;

100. a battery case assembly; 101. a battery case; 102. a battery; 1021. a first conductive sheet; 1022. a second conductive sheet; 103. a first positioning portion; 104. a second positioning portion; 105. a first clamping part; 106. a second clamping part; 107. a first connection portion; 108. a second connecting portion; 109. and a heat sink.

Detailed Description

Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are accordingly to be regarded as illustrative in nature and not as restrictive.

In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples in the figures. The plurality described in the present invention is at least 2. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of the invention.

Referring to fig. 1 to 7, a battery module according to an embodiment of the present invention includes: a plurality of battery cartridge assemblies 100; the reinforcing member 20, reinforcing member 20 laminating is at the tip of a plurality of battery case subassemblies 100, and is connected with a plurality of battery case subassemblies 100, and wherein, when battery case subassembly 100 is whole to be the cuboid, including two big faces and four facet, the tip of battery case subassembly 100 is the facet of battery case subassembly 100.

The battery module according to one embodiment of the present invention can achieve the connection of the plurality of battery cartridge assemblies 100 through the reinforcing member 20, and the connection strength of the plurality of battery cartridge assemblies 100 is improved because the reinforcing member 20 is directly connected to the battery cartridge assemblies 100.

An embodiment of the present invention further provides a battery module frame, referring to fig. 1 to 7, the battery module frame includes: a side plate 10, the side plate 10 being adapted to be disposed at a side of the battery cartridge assembly 100; a reinforcing member 20 adapted to be fitted to ends of the plurality of battery cartridge assemblies 100 and to be connected to the plurality of battery cartridge assemblies 100; and an end plate 30, the end plate 30 being disposed on a side of the reinforcing member 20 facing away from the battery pack assembly 100.

The battery module frame according to an embodiment of the present invention can achieve the connection of the plurality of battery cartridge assemblies 100 through the side plates 10, the reinforcing members 20, and the end plates 30, and the reinforcing members 20 are directly connected to the battery cartridge assemblies 100, thereby improving the connection strength of the plurality of battery cartridge assemblies 100.

As exemplarily described in connection with the battery cartridge assembly 100 of fig. 1, each of the battery cartridge assemblies 100 includes a battery cartridge 101 and a battery 102 disposed in the battery cartridge 101. The sides of the cartridge assembly 100 may be interpreted as the locations of the large faces of the cartridge assembly 100 (for example, when the cartridge assembly 100 is a rectangular body as a whole, the large faces are two), i.e., the large faces of the cells 102. The reinforcing member 20 is suitably disposed at the end of the battery case assembly 100, i.e., the side plate 10 is disposed opposite to the facet of the battery 102.

Accordingly, the end of the battery pack assembly 100 may be interpreted as a position where the facets of the battery pack assembly 100 are located (for example, when the battery pack assembly 100 is a rectangular body as a whole, the facets thereof are four). The side plate 10 is adapted to be disposed at a side portion of the battery cartridge assembly 100, i.e., the side plate 10 is disposed opposite to a large face of the battery 102.

In one embodiment, a plurality of the battery cartridge assemblies 100 are stacked, i.e., a plurality of the battery cartridge assemblies 100 form a stack as shown in fig. 5. That is, the stacked body includes two side portions, at least one of which corresponds to the side plates 10, and four end portions, at least one of which corresponds to the reinforcing member 20, and the reinforcing member 20 is connected to each of the plurality of cell cartridge assemblies 100.

For example, the reinforcement member 20 and the side plate 10 are both two, the two reinforcement members 20 are disposed oppositely, and the two side plates 10 are disposed oppositely, thereby achieving the clamping of the stacked body.

In one embodiment, the surface of the stiffener 20 is provided with an insulating layer, and in particular, the stiffener 20 may be made of a metal material, and the surface thereof may be coated with an insulating layer, i.e., the insulating layer may be used to prevent electrical connection between the metal portion of the stiffener 20 and other components. Alternatively, the reinforcing member 20 may be made of a high polymer material with better strength, such as polyetheretherketone, as long as the reinforcing member 20 has sufficient strength, and the material of the reinforcing member 20 is not limited herein and may be selected according to actual use requirements.

In one embodiment, the stiffener 20 is made of a metallic material, i.e. the stiffener 20 is a metallic stiffener. The metal material may be aluminum, steel or other metal materials, and is not limited herein.

In one embodiment, at least one of the side plates 10 and the end plates 30 is connected with the reinforcement 20. The provision of the end plates 30 further improves the connection strength of the battery module and can be used in connection with a case in which the battery module is placed.

In one embodiment, the reinforcing member 20 is used to connect a plurality of battery cartridge assemblies 100, and the end plates 30 are used to form an end protection and connection structure of the battery module, and the coupling side plates 10 constitute a battery module frame fixing the plurality of battery cartridge assemblies 100.

In one embodiment, all three of the side plates 10, the reinforcing member 20, and the end plates 30 may not be connected, but fixed to each other by being connected to a case where the battery module is provided.

In one embodiment, the end plate 30 is provided with fixing holes 32, and the fixing holes 32 are used for fasteners to pass through to connect the battery module to a housing in which the battery module is disposed.

Specifically, when the side plate 10 and the reinforcing member 20 are connected, the end plate 30 may be connected to any one of the reinforcing member 20 and the end plate 30, that is, the connection of the side plate 10, the reinforcing member 20, and the end plate 30 is achieved.

Accordingly, when the end plate 30 and the reinforcement member 20 are connected, the side plate 10 may be connected to any one of the reinforcement member 20 and the end plate 30, that is, the connection of the side plate 10, the reinforcement member 20, and the end plate 30 is achieved.

In one embodiment, the side plates 10 and the end plates 30 are both metal structures. Optionally, at least one of the side panels 10 and the end panels 30 is of a non-metallic construction, such as a plastic construction.

In one embodiment, the end plate 30 and the stiffener 20 are both metal structures and are separate structures.

In one embodiment, the end plate 30 and the reinforcement member 20 are both of metal construction and are of unitary construction.

In one embodiment, the reinforcing member 20 forms an escape space 21, and the escape space 21 is adapted to escape a predetermined part electrically connected to the battery pack assembly 100.

It should be noted that the ends of the plurality of cell box assemblies 100 need to be connected with preset components such as the collecting assembly 50 and the bus bar 60, that is, the preset components may be, but are not limited to, the collecting assembly 50 and/or the bus bar 60. In order to ensure that the reinforcing member 20 does not interfere with the installation of the predetermined parts, it is necessary to form a space 21 on the reinforcing member 20 so as to ensure that the predetermined parts pass through the space 21 and can be connected to the battery pack assembly 100, thereby ensuring that the reinforcing member 20 does not contact the predetermined parts and also achieving electrical isolation.

In one embodiment, the stiffener 20 is hollow to form an escape space 21. The relief space 21 may be a through hole formed in the reinforcement member 20. In particular, the reinforcing member 20 may be attached to the battery case assembly 100, and then the collecting member 50, the bus bar 60, and other predetermined components may be attached to the battery case assembly 100. Alternatively, the collecting member 50 and the bus bar 60 may be first attached to the battery pack assembly 100, and then the reinforcing member 20 may be attached to the battery pack assembly 100, which is not limited herein, as long as the installation requirement is satisfied.

Alternatively, the avoiding space 21 may be a groove formed on the reinforcing member 20, the notch of the groove faces the battery pack assembly 100, that is, the groove is a containing cavity, and the preset components such as the collecting assembly 50 and the bus bar 60 are arranged in the groove. In particular, it is necessary to attach the collecting member 50, the bus bar 60, and other predetermined components to the battery pack assembly 100, and then attach the reinforcing member 20 to the battery pack assembly 100.

In one embodiment, the stiffener 20 includes: two fixing plate sections 22, the two fixing plate sections 22 being adapted to be connected to the plurality of battery cartridge assemblies 100; wherein an escape space 21 is formed between the two securing plate sections 22. The fixing plate sections 22 are used for connecting a plurality of battery box assemblies 100, i.e. for reinforcing the connection of a plurality of battery box assemblies 100, the escape space 21 is a space between the upper and lower fixing plate sections 22, and the reinforcing member 20 is composed of two independent fixing plate sections 22.

In one embodiment, the fixing plate section 22 is two separate plates that are connected to the plurality of battery pack assemblies 100 at intervals, in which case the fixing plate section 22 may be connected to at least one of the side plates 10 and the end plates 30.

In one embodiment, as shown in fig. 7, the reinforcing member 20 further includes: the connecting plate section 23 is characterized in that two ends of the connecting plate section 23 are respectively connected with the two fixing plate sections 22, and an avoiding space 21 is formed between the two fixing plate sections 22 and the connecting plate section 23; wherein at least one of the side plates 10 and the end plates 30 is connected with the connecting plate segment 23, thereby achieving the fixation of the reinforcement 20.

In one embodiment, the reinforcing member 20 includes two fixing plate segments 22 and a connecting plate segment 23 connecting the two fixing plate segments 22, the two fixing plate segments 22 are used to connect the plurality of battery cartridge assemblies 100, and the connecting plate segment 23 may connect the reinforcing member 20 with the side plate 10 and/or the end plate 30, thereby enhancing the connection strength of the plurality of battery cartridge assemblies 100.

In one embodiment, as shown in fig. 7, the connecting plate section 23 includes: the two ends of the first connecting plate section 231 are respectively connected with the two fixing plate sections 22, and the first connecting plate section 231 is connected with the side plate 10; a second web section 232, the second web section 232 being arranged on the first web section 231 and extending in a direction away from the side plate 10, the second web section 232 being connected to the end plate 30. The first and second connecting

plate segments

231 and 232 connect the reinforcing member 20 to the side plates 10 and the end plates 30, thereby securely connecting the plurality of battery cartridge assemblies 100 within the battery module.

In one embodiment, the side plates 10 are two, and the two side plates 10 are adapted to hold a plurality of battery cartridge assemblies 100; two connecting plate sections 23 are provided, and an avoiding space 21 is formed between the two fixing plate sections 22 and the two connecting plate sections 23. The escape space 21 is a substantially rectangular space, two first connecting plate segments 231 connect the two side plates 10, respectively, and two second connecting plate segments 232 connect both ends of the end plate 30, respectively, and a plurality of battery cartridge assemblies 100 are stacked between the reinforcing member 20 and the two side plates 10, and a reliable connection is achieved.

In one embodiment, the first connecting plate 231 is fixedly connected to the side plate 10, and the first connecting plate 231 is connected to the side plate 10 by welding, clamping or fastening. Accordingly, the second connecting plate segment 232 is fixedly connected to the end plate 30, and the second connecting plate segment 232 and the end plate 30 can be welded, clamped or connected by a fixing member.

In one embodiment, the first connecting plate segment 231 is welded to the side plate 10, i.e., the reinforcement 20 is welded to the side plate 10 through the first connecting plate segment 231. Accordingly, the second connection plate segment 232 is welded with the end plate 30, so that the reinforcement 20 is welded with the end plate 30 through the second connection plate segment 232.

In one embodiment, referring to fig. 1 and 2, the number of the side plates 10 is two, the two side plates 10 are disposed opposite to each other, the number of the reinforcing members 20 is two, the number of the end plates 30 is two, and the two end plates 30 are disposed opposite to each other, so as to clamp the plurality of battery box assemblies 100 and ensure that the plurality of battery box assemblies 100 can be stably fixed relative to each other.

In one embodiment, as shown in fig. 2 and 3, the method further includes: an insulating member 40, the insulating member 40 being adapted to be connected to the plurality of battery cartridge assemblies 100 and covering the escape space 21; wherein the end plate 30 is disposed on a side of the insulating member 40 facing away from the reinforcing member 20, so as to ensure that the end plate 30 is insulated from the charged structure of the battery module, such as the collecting assembly 50, the bus bar 60, and the like.

In one embodiment, the insulating member 40 is coupled to a plurality of battery cartridge assemblies 100; and the insulating member 40 is coupled to the end plate 30 to ensure the stability of the coupling.

In one embodiment, the insulating member 40 is adapted to be snap-fitted to a plurality of battery cartridge assemblies 100; and/or the end plate 30 is clamped with the insulating piece 40, so that the connection between the parts is facilitated on the basis of ensuring the stability of the connection.

In one embodiment, as shown in fig. 1, the end plate 30 is provided with a third positioning portion 31, the insulating member 40 is provided with a fourth positioning portion 41, and the third positioning portion 31 is connected with the fourth positioning portion 41.

Specifically, the third positioning portion 31 is a protrusion, the fourth positioning portion 41 is a groove, and the protrusion is inserted into the groove; or, the third positioning portion 31 is a groove, and the fourth positioning portion 41 is a protrusion, and the protrusion is inserted into the groove.

In one embodiment, the third positioning portion 31 is a positioning hole, and the fourth positioning portion 41 is a positioning column; or, the third positioning portion 31 is a positioning column, and the fourth positioning portion 41 is a positioning hole.

In one embodiment, the third positioning portion 31 and the fourth positioning portion 41 are both provided in plurality and are provided in one-to-one correspondence.

In one embodiment, as shown in fig. 1 and 6, the number of the insulating members 40 is two, the two insulating members 40 are disposed opposite to each other, the number of the side plates 10 is two, the number of the reinforcing members 20 is two, the number of the end plates 30 is two, and the number of the reinforcing members 20, the number of the end plates 30, and the number of the insulating members 40 are all disposed in pairs, so that the reinforcing members 20, the end plates 30, and the insulating members 40 are disposed at both ends of the plurality of battery pack assemblies 100, and an installation space of the plurality of battery pack assemblies 100 is formed between the two side plates 10.

In one embodiment, the reinforcing member 20 is formed by sheet metal, and the reinforcing member 20 has the same thickness, i.e., the fixing plate segment 22, the first connecting plate segment 231 and the second connecting plate segment 232 have the same thickness. The securing plate segment 22, the first connecting plate segment 231 and the second connecting plate segment 232 have different widths to achieve different connecting effects and meet strength requirements. Since the width can be increased to increase the strength of the panel, the thickness of the reinforcing member 20 can be made thinner, and the occupied space can be reduced.

It should be noted that the side plates 10 are metal side plates, the reinforcing members 20 at both ends of the battery module are welded to the side plates 10 at both sides to form metal frames, the metal frames fix the stacked body formed by the plurality of battery case assemblies 100 in the frames, and each battery case assembly 100 is directly and mechanically connected to the metal frame, so that the structural strength and rigidity are higher, and the battery module has better reliability in coping with extreme conditions such as vibration and impact.

Referring to fig. 1 to 9, the battery module further includes the above-mentioned battery module frame and a plurality of battery box assemblies 100.

The battery module according to one embodiment of the present invention can achieve the connection of the plurality of battery cartridge assemblies 100 through the side plates 10, the reinforcing members 20, and the end plates 30, and the connection strength of the plurality of battery cartridge assemblies 100 is improved because the reinforcing members 20 are directly connected to the battery cartridge assemblies 100.

In one embodiment, as shown in fig. 1, the cartridge assembly 100 includes: the battery box 101, the battery box 101 is clamped with the reinforcement 20; and a battery 102, the battery 102 being disposed in the battery case 101. Stiffener 20 lug connection is in the tip of battery case 101, and with the equal joint of each battery case 101 of a plurality of battery case subassemblies 100, not only convenient connection, and the operation is comparatively simple, also can guarantee the joint strength between stiffener 20 and a plurality of battery cases 101.

In one embodiment, as shown in fig. 4 and 5, the battery case 101 is provided with a first positioning portion 103 and a second positioning portion 104, the first positioning portion 103 and the second positioning portion 104 are arranged at intervals, and the reinforcing member 20 is clamped between the first positioning portion 103 and the second positioning portion 104. When the reinforcing member 20 is installed, the first positioning portion 103 and the second positioning portion 104 realize installation and positioning of the reinforcing member 20, that is, quick connection is realized, and the operation is convenient.

In one embodiment, the first positioning portion 103 and the second positioning portion 104 are both protrusions, the installation space formed between the first positioning portion 103 and the second positioning portion 104 is used for placing the fixing plate segments 22 of the reinforcing member 20, and two pairs of the first positioning portion 103 and the second positioning portion 104 are respectively arranged on the battery case 101 for clamping the two fixing plate segments 22. The insulating member 40 is engaged with the two first positioning portions 103, that is, the insulating member 40 contacts with the outer sides of the two first positioning portions 103, so that the insulating member 40 is positioned by the first positioning portions 103 on the plurality of battery cartridges 101.

In one embodiment, the end surfaces of both ends of the battery case 101 are provided with a first positioning portion 103 and a second positioning portion 104, the first positioning portion 103 and the second positioning portion 104 are positioning protrusions, and the reinforcing member 20 is fitted into a groove formed by the positioning protrusions. The reinforcing member 20 is mechanically coupled to the side plates 10 mounted at both sides of the stacked body of the battery case assembly 100 by welding. Two stiffeners 20 and two curb plates 10 form the metal construction frame of battery module to fix battery box subassembly 100 in the structural frame, wherein each battery box subassembly 100 all is set up the stiffener 20 snap-on at battery case 101 both ends, has effectively improved the fixed strength of battery case subassembly 100.

It should be noted that, the mechanical connection between the battery box assembly 100 and the reinforcing member 20 is realized by the positioning protrusion disposed on the battery box and the reinforcing member 20, so that the height of the positioning protrusion is the same as the thickness of the reinforcing member 20, and the occupied space is small. In addition, the positioning protrusion is disposed in the same space as the conductive sheet of the battery pack assembly 100, and the height of the positioning protrusion does not exceed the conductive sheet, so that the structural size of the battery module is not increased by the positioning protrusion, and the space utilization rate of the battery module is improved.

In one embodiment, as shown in fig. 2 to 4, the battery module further includes: an end plate 30 and an insulating member 40, the end plate 30 being disposed on a side of the reinforcing member 20 facing away from the battery pack assembly 100; the insulating member 40 is located between the reinforcing member 20 and the end plates 30, and covers the ends of the battery case assembly 100.

In one embodiment, the insulating members 40 are plastic end plates, the end plates 30 are metal end plates, the plastic end plates are fastened to two ends of the battery box assembly 100 and are positioned by the first positioning portions 103 on the battery box 101, and the first positioning portions 103 are positioning protrusions. The plastic end plates serve for insulating isolation of the electrically conductive components of the battery module. The plastic end plate is provided with a fourth positioning part 41, the fourth positioning part 41 is a positioning column and is matched with a third positioning part 31 arranged on the metal end plate, and the third positioning part 31 is a positioning hole, so that the metal end plate can be quickly installed. The metal end plate sides are mechanically connected to the reinforcement 20 by welding.

In one embodiment, as shown in fig. 1 and 4, the battery module further includes: the collecting assembly 50 and the bus bar 60 are connected to the battery box 101 and are spaced from the reinforcing part 20; wherein the evacuation space 21 of the stiffener 20 is adapted to evacuate at least one of the collection assembly 50 and the busbar 60. The collecting assembly 50 is used for collecting signals of the battery modules, such as temperature signals, voltage signals, etc., and the bus bars 60 are used for realizing series connection and parallel connection between the respective batteries 102.

In one embodiment, since the collecting member 50 and the bus bar 60 are both conductive members and thus need to be insulated from the reinforcing member 20, the space 21 can ensure that the collecting member 50 and the bus bar 60 are both connected to the battery case assembly 100 and also prevent the reinforcing member 20 from contacting the collecting member 50 and the bus bar 60.

In one embodiment, the thickness of the fixing plate 22 is less than or equal to the height of the first positioning portion 103 and the second positioning portion 104, which ensures that the fixing plate 22 does not exceed the height of the first positioning portion 103 and the second positioning portion 104, thereby preventing the fixing plate 22 from contacting the collecting assembly 50 and the bus bar 60.

In one embodiment, at least one of the collection assembly 50 and the bus bar 60 is snap-fitted to the battery pack 100, and further, at least one of the collection assembly 50 and the bus bar 60 is snap-fitted to the battery pack 101, that is, the collection assembly 50 and the bus bar 60 are directly connected to the battery pack 101, so that the number of mounting parts can be reduced.

In one embodiment, as shown in fig. 1 and 5, the battery box 101 is provided with a first connecting portion 107 and a second connecting portion 108, the collecting assembly 50 is provided with a third connecting portion 51, the busbar 60 is provided with a fourth connecting portion 61, the first connecting portion 107 is connected with the third connecting portion 51, and the second connecting portion 108 is connected with the fourth connecting portion 61.

In one embodiment, the first connecting portion 107 and the third connecting portion 51 are configured as a protrusion and a groove, and the specific form can be determined according to actual use. The second connecting portion 108 and the fourth connecting portion 61 are configured as a protrusion and a groove, and the specific form can be determined according to actual use.

In one embodiment, the first connecting portion 107 is a positioning hole, the first connecting portion 107 is disposed on the second positioning portion 104, and the third connecting portion 51 is a positioning column.

In one embodiment, the second connecting portion 108 is a positioning post, and the fourth connecting portion 61 is a positioning hole.

In one embodiment, the first connecting portion 107 and the second connecting portion 108 are disposed on the end surfaces of the two ends of the battery case 101, and the first connecting portion 107 and the second connecting portion 108 are a positioning hole and a positioning post, respectively. The back of the collecting component 50 is provided with a third connecting part 51, the third connecting part 51 is a positioning column, and the positioning column is matched with the positioning hole to realize the fixation of the collecting component 50. The busbar 60 is provided with a fourth connecting portion 61, the fourth connecting portion 61 is a positioning hole, and the positioning hole is matched with the positioning column to fix the busbar 60. Because the fixed structure with gathering subassembly 50 and busbar 60 directly integrates on battery case 101, gather subassembly 50 and busbar 60 and can directly fix on battery case 101, saved the busbar mount, reduced battery module weight and cost.

In one embodiment, the two first positioning portions 103 and the two second positioning portions 104 have the same structure, and the first connecting portion 107 and the second connecting portion 108 are provided in two for each battery case 101, so that the collecting member 50 and the bus bar 60 can be mounted regardless of the placement direction of each battery case assembly 100 during the assembly of the battery module, thereby improving the assembly efficiency.

In one embodiment, two adjacent cartridges 101 are snapped together to ensure that the plurality of cartridge assemblies 100 are connected in sequence.

In one embodiment, as shown in fig. 5 and 8, in one embodiment, one side of the battery box 101 is provided with a first clamping portion 105, the other side of the battery box 101 is provided with a second clamping portion 106, and the first clamping portion 105 is matched with the second clamping portion 106; the first clamping part 105 of one battery box 101 of the two adjacent battery boxes 101 is clamped with the second clamping part 106 of the other battery box 101, so that the adjacent battery boxes 101 are positioned, and the stacking and assembling efficiency of the battery box assembly 100 is improved.

In one embodiment, the first clip portion 105 and the second clip portion 106 are configured as a protrusion and a groove, and the specific form can be determined according to actual use. Each battery box 101 is provided with at least two first clamping portions 105 and second clamping portions 106.

In one embodiment, as shown in fig. 1, the battery case 101 includes a frame body and a heat sink 109 disposed in the frame body, the heat sink 109 is located at the middle of the frame body, so that mounting grooves are formed at both sides of the frame body, and two batteries 102 are disposed in the corresponding mounting grooves.

In one embodiment, the battery cartridge assembly 100 is comprised of a battery cartridge 101 and two batteries 102 mounted therein, the battery cartridge 101 being comprised of a plastic frame, a heat sink 109 and a conductive sheet. The radiating fin 109 is embedded in the plastic frame during injection molding of the plastic frame, the conducting strip is fixed on the plastic frame through a clamping hook arranged on the plastic frame, the battery 102 is connected on the radiating fin 109 through glue, and the battery tab is electrically connected with the conducting strip through laser welding.

Specifically, the heat dissipation plate 109 extends from the upper and lower surfaces of the plastic frame and is bent and attached to the upper and lower surfaces, so that heat conduction between the battery 102 and the outside of the battery module is realized, that is, the heat dissipation plate 109 is integrally i-shaped.

In one embodiment, as shown in fig. 8 and 9, the cartridge assembly 100 is of two types. Referring to fig. 8, in a battery pack assembly 100, a conductive sheet is a first conductive sheet 1021, and the first conductive sheet 1021 is a U-shaped conductive sheet, and two battery tabs in a battery box 101 are connected in parallel. As shown in fig. 9, in the battery pack assembly 100, the conductive sheet is a second conductive sheet 1022, and the second conductive sheet 1022 is an L-shaped conductive sheet, and the L-shaped conductive sheet is electrically connected to only one battery tab. The bus bars 60 are laser welded to the conductive sheets, and different series-parallel configurations of the battery modules can be achieved by configuring the types and numbers of the conductive sheets connected to the same bus bar 60. For example, bus bar 60 is electrically connected to 1L-shaped and 1U-shaped conductive tab, which results in 3-up arrangement of the battery, and bus bar is electrically connected to 2U-shaped conductive tabs, which results in 4-up arrangement of the battery. The method is not further limited, and the method can be correspondingly set according to specific use requirements.

According to the battery module, the two reinforcing pieces 20 are matched with the two side plates 10 to form the metal frame, and the two reinforcing pieces 20 are fixedly connected with the battery box assembly 100, so that the battery module is high in strength and good in reliability. The reinforcing part 20 is plate-shaped and is attached to the battery box 101, so that other structures are not affected, the occupied space is small, and the space utilization rate is improved. The reinforcing part 20 and the battery box assembly 100 are matched and fixed through a positioning bulge and a positioning hole, and the height of the positioning bulge is larger than the thickness of the reinforcing part 20, so that the acquisition assembly 50 and the reinforcing part 20 can be isolated. The battery cartridge assembly 100 is snap-fit connected to the bus bar 60 to fix the bus bar 60, reducing the weight and cost of the battery module.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and exemplary embodiments be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims

1. A battery module, comprising:

a plurality of battery cartridge assemblies (100);

a reinforcement (20) attached to end portions of the plurality of battery cartridge assemblies (100) and connected to the plurality of battery cartridge assemblies (100),

when the whole battery box assembly (100) is a cuboid, the battery box assembly comprises two large faces and four small faces, and the small faces of the battery box assembly (100) are arranged at the end parts of the battery box assembly (100).

2. The battery module of claim 1, further comprising:

a collection assembly (50) and a bus bar (60), both the collection assembly (50) and the bus bar (60) being connected to the battery case assembly (100);

the reinforcement (20) is formed with an avoidance space (21), and the avoidance space (21) can avoid the collection assembly (50) and the bus bar (60).

3. The battery module according to claim 2, wherein the reinforcement (20) includes:

the number of the fixing plate sections (22) is two, and the two fixing plate sections (22) are respectively connected with the plurality of battery box assemblies (100);

wherein the escape space (21) is formed between the two fixing plate sections (22).

4. The battery module according to claim 3, wherein the reinforcement (20) further comprises:

connecting plate section (23), the both ends of connecting plate section (23) are connected two respectively fixed plate section (22), two fixed plate section (22) and form between connecting plate section (23) dodge space (21).

5. The battery module of claim 4, further comprising:

the side plate (10) is arranged on the side part of the battery box assembly (100), wherein the side part of the battery box assembly (100) is the large surface of the battery box assembly (100); and/or the presence of a gas in the gas,

an end plate (30), the end plate (30) being disposed on a side of the reinforcement (20) facing away from the battery pack assembly (100);

at least one of the side plates (10) and the end plates (30) is connected to the connecting plate section (23).

6. The battery module according to claim 5, wherein the connection plate segment (23) comprises:

the two ends of the first connecting plate section (231) are respectively connected with the two fixing plate sections (22), and the first connecting plate section (231) is connected with the side plate (10);

a second connection plate segment (232), the second connection plate segment (232) being disposed on the first connection plate segment (231) and extending in a direction in which the battery cartridge assembly (100) is directed to the end plate (30), the second connection plate segment (232) being connected with the end plate (30).

7. The battery module according to claim 1, wherein the reinforcing member (20) is engaged with the plurality of battery pack assemblies (100).

8. The battery module according to claim 7, wherein the reinforcing member (20) comprises:

the battery box assembly comprises fixing plate sections (22), wherein the fixing plate sections (22) are two, two fixing plate sections (22) are arranged at intervals, and two fixing plate sections (22) are connected with the battery box assembly (100) in a clamped mode respectively.

9. The battery module according to claim 8, wherein the battery pack assembly (100) is provided with a first positioning portion (103) and a second positioning portion (104), the first positioning portion (103) and the second positioning portion (104) are provided at intervals, and the fixing plate segment (22) is interposed between the first positioning portion (103) and the second positioning portion (104).

10. The battery module according to claim 9, wherein the thickness of the fixing plate segment (22) is less than or equal to the height of the first positioning portion (103) and less than or equal to the height of the second positioning portion (104).

11. The battery module according to any one of claims 1 to 4, further comprising:

an insulating member (40), the insulating member (40) being located between the reinforcing member (20) and the end plate (30) and covering the ends of the battery case assembly (100).

12. The battery module according to claim 11, wherein the insulating member (40) is engaged with the plurality of battery cartridge assemblies (100);

the insulating piece (40) is clamped with the end plate (30).

13. The battery module of claim 12, further comprising:

the side plate (10) is arranged on the side part of the battery box assembly (100), wherein the side part of the battery box assembly (100) is the large surface of the battery box assembly (100);

the battery module is characterized in that the number of the insulating parts (40) is two, the number of the side plates (10) is two, the number of the reinforcing parts (20) is two, the number of the end plates (30) is two, and the number of the end plates (30) is two, so that the battery box assembly (100) in the battery module can be clamped.

14. The battery module according to any one of claims 1 to 10, 12 or 13, wherein the reinforcing member (20) is made of a metal material.