Battery module and assembling method thereof

Abstract

The invention provides a battery module and an assembling method thereof. The battery module comprises two conductive brackets and a plurality of battery cells, the two conductive supports respectively comprise a battery support and a conductive sheet. The conducting strip is embedded in the battery bracket, and the battery bracket and the conducting strip are combined into a whole. A plurality of battery cells are arranged between the battery brackets of the two conductive brackets, and the conductive sheets of the two conductive brackets are respectively pressed and connected with the plurality of battery cells. Therefore, convenience of assembly, maintenance and replacement can be facilitated, the overall cost is reduced, and industrial application is improved.

Description

Technical Field

[0001] The present application relates to the field of battery modules, and particularly to a battery module in which a conductive sheet is embedded in a battery bracket for easy assembly, maintenance, and replacement, and an assembly method thereof. Background Art

[0002] With the increasing demand for lithium battery modules and the growing requirements of the green industry for environmental protection, the currently used battery modules connect the battery cells and the conductive sheets by welding. When the battery cells fail or age and need to be disassembled, it is extremely easy to cause a short circuit, which becomes a major difficulty in reuse or maintenance. At the same time, when connecting the battery cells by welding, eutectic will be generated by melting with the conductive sheet. Therefore, when the conductive sheet is removed again, it cannot be completely restored to the original state of the battery cell, and residues will be generated. Such a flat surface is difficult to weld for the second time, so effective maintenance and reuse cannot be carried out.

[0003] Therefore, in view of the above problems of the prior art, the present application further provides a battery module and an assembly method thereof to solve the problems generated by the prior art. Summary of the Invention

[0004] In view of the above problems, the main object of the present application is to provide a battery module and an assembly method thereof, which are convenient for assembly, maintenance, and replacement, thereby reducing the overall cost to improve industrial applications.

[0005] To achieve the above object, the present application provides a battery module, which includes: two conductive brackets and a plurality of battery cells. The two conductive brackets respectively include a battery bracket and a conductive sheet. The conductive sheet is embedded in the battery bracket, and the battery bracket and the conductive sheet are integrated. The plurality of battery cells are arranged between the battery brackets of the two conductive brackets, and the conductive sheets of the two conductive brackets respectively press-connect the plurality of battery cells.

[0006] In one embodiment, the battery module further includes a fixing member, and the fixing member passes through the battery bracket to fix and press the plurality of battery cells and the conductive sheet. The battery brackets of the two conductive brackets are respectively provided with a communicating fixing hole at a position corresponding to the fixing member for the fixing member to be inserted. Therefore, by inserting the fixing member into the fixing hole and locking it to provide a pressing force, the conductive sheet and the battery cell are connected.

[0007] In one embodiment, one of the two conductive brackets is provided with a buckle portion, and the other of the two conductive brackets is provided with a engaging portion, and the buckle portion is buckled on the engaging portion to buckle the two conductive brackets. Therefore, by buckling the buckle portion on the engaging portion to press the battery cells, the conductive brackets can be quickly disassembled when the battery cells need to be disassembled and replaced.

[0008] According to the purpose of the present application, the present application further provides an assembly method for a battery module, including:

[0009] Embedding a conductive sheet in a battery bracket to form an integrated conductive bracket; and arranging two of the conductive brackets at both ends of a plurality of battery cells, and fixing and pressing the plurality of battery cells through the two conductive brackets to form a battery module.

[0010] Based on the above, the present application solves the problem of difficult removal caused by the welding method in the prior art by the structure and method of embedding the conductive sheet in the battery bracket and making the battery cell contact with the conductive sheet through pressing the battery cell.

[0011] The following is an example of the preferred embodiment of the present application and is described in conjunction with the accompanying drawings as follows. Description of the Drawings

[0012] Figure 1 Is an exploded view of the first embodiment of the battery module of the present application;

[0013] Figure 2 Is a perspective view of the first embodiment of the battery module of the present application;

[0014] Figure 3A Is a schematic cross-sectional view of the conductive bracket of the battery module of the present application;

[0015] Figure 3B Is a schematic cross-sectional view of the conductive bracket connecting the battery cells of the present application;

[0016] Figure 4 Is a flowchart of the first embodiment of the assembly method of the battery module of the present application;

[0017] Figure 5 Is an exploded view of the second embodiment of the battery module of the present application;

[0018] Figure 6 Is a perspective view of the second embodiment of the battery module of the present application;

[0019] Figure 7 Is a schematic flow chart of the second embodiment of the assembly method of the battery module of the present application;

[0020] Figure 8 Is a perspective view of the third embodiment of the battery module of the present application;

[0021] Figure 9 Is a schematic flow chart of the third embodiment of the assembly method of the battery module of the present application.

[0022] Explanation of the reference numerals: M1, M2, M3 - battery module; 10A, 10B, 10A', 10B', 10A", 10B" - conductive bracket; 100 - battery cell accommodating space; 12 - battery bracket; 120 - battery cell accommodating groove; 122 - through hole; 14 - conductive sheet; 142 - protrusion; 144 - connecting portion; 20 - battery cell; 30 - fixing piece; 32 - fixing hole; 40 - buckle portion; 42 - snap-fit ​​portion; S11~S12, S21~S24, S31~S34 - steps. DETAILED DESCRIPTION

[0023] The present application is described below based on embodiments, but the present application is not limited to these embodiments. In the detailed description of the present application below, some specific details are described in detail. It is possible for those skilled in the art to fully understand the present application without the description of these details. In order to avoid confusing the essence of the present application, known methods, processes, flows, components and circuits are not described in detail.

[0024] The embodiments of the present application will be further explained below with reference to the accompanying drawings. As much as possible, the same reference numerals represent the same or similar components in the drawings and the specification. In the drawings, shapes and thicknesses may be exaggerated for simplicity and convenience. It is understood that the elements not specifically shown in the drawings or described in the specification are known to those of ordinary skill in the art with common knowledge. A person of ordinary skill in the art may make various changes and modifications based on the contents of the present application.

[0025] See also Figure 1 and Figure 2 , the first embodiment includes a battery module M1, the battery module M1 includes a conductive bracket 10A, a conductive bracket 10B and a plurality of battery cells 20. The conductive bracket 10A and the conductive bracket 10B respectively include a battery bracket 12 and a conductive sheet 14. The conductive sheet 14 is buried in the battery bracket 12, wherein the battery bracket 12 and the conductive sheet 14 are combined into one body. A plurality of battery cells 20 are arranged between the battery brackets 12 of the conductive bracket 10A and the conductive bracket 10B, and the conductive sheets 14 of the conductive bracket 10A and the conductive bracket 10B are respectively pressed and connected to the plurality of battery cells 20. For ease of understanding, the conductive bracket 10A in the figure is represented by a transparent structure, but in actual implementation, the battery bracket 12 and the conductive sheet 14 of the conductive bracket 10A and the conductive bracket 10B are combined into one body, and the battery bracket 12 can be but is not limited to an insulating material, a plastic material, a transparent or opaque material.

[0026] The battery holder 12 is provided with a plurality of battery cell accommodation grooves 120, and the bottoms of the plurality of battery cell accommodation grooves 120 communicate with one side of the conductive sheet 14. On the other side of the conductive sheet 14, a plurality of through holes 122 may be provided on the outside of the battery holder 12, or a pressing sheet (not shown in the figure) may be provided on the through holes 122, or the outside of the battery holder 12 is a solid structure but a part close to the conductive sheet 14 is recessed to form an avoidance groove (not shown in the figure), wherein the positions of the plurality of through holes 122, the pressing sheet or the avoidance groove correspond to the positions of the plurality of battery cell accommodation grooves 120. The battery holder 12 and the conductive sheet 14 are formed as one body by an injection process, and the battery holder 12 and the conductive sheet 14 (such as a bus bar or a conductive medium, etc.) are combined into one body. The battery holders 12 of the conductive brackets 10A and 10B are connected to each other to jointly define a battery cell accommodation space 100 for the battery cells 20 to be inserted. One side of the conductive sheet 14 is provided with a connecting portion 144, and the connecting portion 144 extends outside the corresponding battery holder 12 and can be used to connect external electrical circuits or assemble with other components. The conductive sheet 14 can be but is not limited to a flexible material, and the positions of the positive and negative electrodes of the conductive sheet 14 and the plurality of battery cells 20 can be adjusted in series and parallel according to requirements, and this is not limited thereto.

[0027] Please continue to refer to Figure 3A And Figure 3B , a plurality of protruding portions 142 are provided on a part of the conductive sheet 14, and the plurality of protruding portions 142 are located at the positions corresponding to the battery cells 20 (i.e., the bottoms of the battery cell accommodation grooves 120), and the plurality of protruding portions 142 are respectively used to connect the plurality of battery cells 20. Figure 3A And Figure 3B The position marked by the through hole 122 of can be provided with a pressing sheet or an avoidance groove (not shown in the figure). In this embodiment, a plurality of through holes 122 are provided on the other side of the battery holder 12 corresponding to the protruding portions 142, and the positions of the through holes 122 correspond to the battery cell accommodation grooves 120. In this way, the operator can check the reliability of the conductive sheet 14 through the through holes 122. At the same time, through the elastic structure of the conductive sheet 14 and the space of the through holes 122, when the battery cells 20 contact the protruding portions 142 on the conductive sheet 14, they can be in complete contact, thus avoiding the problem of poor contact. Generally speaking, if the through holes 122 are presented in a solid structure, it may cause no tolerance or buffer space when the battery cells 20 are inserted and contact the conductive sheet 14. Since there is a need for some pressing and contact space when the battery cells 20 are inserted, once the stress is too large, it will cause the conductive sheet 14 to be easily over-pressed and reduce the service life.

[0028] The protruding portion 142 can be understood as a convex hull structure, having a certain structural strength and a certain degree of elasticity. When the battery cell 20 is inserted into the battery cell accommodation groove 120, the protruding portion 142 can be connected to the battery cell 20 through the up and down pressing force to avoid poor contact. Since the protruding portion 142 has a certain structural strength and a certain degree of elasticity, when the battery cell 20 is inserted into the battery cell accommodation groove 120, the surface of the protruding portion 142 is slightly deformed by the pressure but can be in full contact with one end of the battery cell 20, without the need to weld to the conductive sheet 14 separately. Thus, the assembly process can be simplified, and the risks such as welding failure or battery cell damage can be solved. If one of the multiple battery cells 20 is damaged in the future, only the damaged battery cell 20 can be replaced separately, without the need to discard the whole set. In this way, the scrap rate can be effectively reduced, and the reuse rate of the battery cell 20 can be improved.

[0029] Although the concept of the assembly method of the battery module has also been described simultaneously in the process of describing the battery module M1 of the present application, for the sake of clarity, the following flowchart is still shown in detail. Please refer to the foregoing Figures 1 to 3B to clearly illustrate the following Figure 4 shown flowchart.

[0030] Step S11: Embed the conductive sheet in the battery bracket to form an integrated conductive bracket.

[0031] Step S12: Set two conductive brackets at both ends of multiple battery cells, and fix and press the multiple battery cells through the two conductive brackets to form a battery module.

[0032] In step S11, a part of the conductive sheet can be provided with multiple protruding portions, and through step S12, the multiple protruding portions can be respectively connected to multiple battery cells.

[0033] Please refer to Figure 5 and Figure 6 , the second embodiment includes a battery module M2. The difference between the battery module M2 and the battery module M1 is that the battery module M2 further includes a fixing member 30. The fixing member 30 is inserted through the battery bracket 12 to fix and press the multiple battery cells 20 and the conductive sheet 14. The fixing member 30 can be, but is not limited to, a combination of a screw, a bolt and a nut, or an element that can be used to fasten two objects. The battery brackets 12 of the conductive brackets 10A' and 10B' are respectively provided with communicating fixing holes 32, and the fixing holes 32 are located at the positions corresponding to the fixing member 30 for the fixing member 30 to be inserted. The remaining structures of the second embodiment have been introduced in the first embodiment and will not be repeated here.

[0034] Although the concept of the assembly method of the battery module has also been described simultaneously in the process of describing the battery module M2, for the sake of clarity, the following flowchart is still shown in detail. Please refer toFigure 7 , Figure 7 For coordinating with Figure 5 and Figure 6 the schematic flow chart of the battery module M2, please coordinate with the foregoing Figures 5 to 6 to clearly illustrate the following Figure 7 schematic flow chart shown

[0035] Step S21: Embed the conductive sheet in the battery bracket to form an integrated conductive bracket, and a plurality of protruding portions are provided on a part of the conductive sheet

[0036] Step S22: Arrange two conductive brackets at both ends of a plurality of battery cells, fix and press the plurality of battery cells through the two conductive brackets, and connect the plurality of battery cells respectively through the plurality of protruding portions

[0037] Step S23: Pass the fixing member through the fixing holes in the battery bracket

[0038] Step S24: Fix and press the plurality of battery cells and the conductive sheet to form a battery module

[0039] When one of the battery cells is damaged and needs to be replaced or repaired, the fixing member can be disassembled, and then the two conductive brackets can be separated from both ends of the battery cells, thus solving the problem that it is difficult to remove the battery cells from the conductive sheet after welding in the prior art

[0040] Please refer to Figure 8 , the third embodiment includes a battery module M3. The difference between the battery module M3 and the battery module M1 is that one of the conductive brackets 10A” and the conductive bracket 10B” is provided with a buckle portion 40, and the other of the conductive brackets 10A” and the conductive bracket 10B” is provided with a engaging portion 42. The buckle portion 40 is buckled on the engaging portion 42 to buckle the conductive bracket 10A” and the conductive bracket 10B”. As shown in the figure, the buckle portion 40 is provided on the conductive bracket 10A”, and the engaging portion 42 is provided on the conductive bracket 10B”. In actual implementation, it can be but not limited to setting the buckle portion 40 on the conductive bracket 10B”, the engaging portion 42 on the conductive bracket 10A”, or the buckle portion 40 on the inner side wall of the other of the conductive brackets 10A” and 10B”, or on the edge of the joint of the conductive brackets 10A” and 10B”. The positions or directions where the buckle portion 40 and the engaging portion 42 are provided are not limited thereto. The remaining structures of the third embodiment have been introduced in the first embodiment and will not be elaborated herein

[0041] Although the concept of the assembly method of the battery module has also been described simultaneously in the process of describing the battery module M3 above, for the sake of clarity, the following still shows a detailed flowchart for illustration. Please refer to Figure 9 , Figure 9 For coordinating with Figure 8Flow schematic diagram of the battery module M3.

[0042] Step S31: Embed the conductive sheet in the battery bracket to form an integrated conductive bracket.

[0043] Step S32: Arrange two conductive brackets at both ends of multiple battery cells. One of the two conductive brackets is provided with a buckle part, and the other of the two conductive brackets is provided with a clamping part.

[0044] Step S33: Fasten one conductive bracket to the clamping part of the other conductive bracket through the buckle part of one conductive bracket to fasten the two conductive brackets.

[0045] Step S34: Fix and press multiple battery cells through the two conductive brackets, and connect multiple battery cells respectively through multiple protrusions to form a battery module.

[0046] In this way, when one of the battery cells needs to be replaced or repaired, the buckle part can be opened to separate the two conductive brackets from both ends of the battery cell, thus solving the problem that it is difficult to remove the battery cell from the previous art after welding with the conductive sheet.

[0047] The above is only an example to illustrate the preferred embodiments of the present application, and is not intended to limit the scope of implementation. Any simple substitution and equivalent change made according to the claims and the content of the specification of the present application are within the scope covered by the present application.

Claims

1. A battery module, It is characterized in that The battery module comprises: Two conductive brackets, the two conductive brackets respectively comprising: Battery holder; and a conductive sheet embedded in the battery holder, wherein the battery holder and the conductive sheet are integrated into one body; and A plurality of battery cells are arranged between the battery supports of the two conductive supports, and the conductive sheets of the two conductive supports are respectively pressed and connected to the plurality of battery cells.

2. The battery module according to claim 1, It is characterized in that The battery support is provided with a plurality of battery cell accommodating grooves, and the bottoms of the plurality of battery cell accommodating grooves are connected to the conductive sheet.

3. The battery module according to claim 1, It is characterized in that The battery brackets of the two conductive brackets are connected to each other to jointly define a battery cell accommodating space.

4. The battery module according to claim 1, It is characterized in that A portion of the conductive sheet is provided with a plurality of protrusions, the plurality of protrusions are located at positions corresponding to the battery cells, and the plurality of protrusions are respectively connected to the plurality of battery cells.

5. The battery module according to claim 1, It is characterized in that It also includes a fixing piece, which is inserted into the battery bracket to fix and press the multiple battery cells and the conductive sheet.

6. The battery module according to claim 5, It is characterized in that The battery brackets of the two conductive brackets are respectively provided with communicating fixing holes, and the fixing holes are located at positions corresponding to the fixing members for the fixing members to be inserted.

7. The battery module according to claim 1, It is characterized in that One of the two conductive brackets is provided with a buckle portion, and the other of the two conductive brackets is provided with a clamping portion, and the buckle portion is buckled on the clamping portion to buckle the two conductive brackets.

8. The battery module according to claim 1, It is characterized in that A connecting portion is provided on one side of the conductive sheet, and the connecting portion extends and is located outside the corresponding battery bracket.

9. A method for assembling a battery module, It is characterized in that include: The conductive sheet is embedded in the battery bracket to form an integrated conductive bracket; as well as Two conductive brackets are arranged at both ends of the plurality of battery cells, and the plurality of battery cells are fixed and pressed by the two conductive brackets to form a battery module.

10. The method for assembling a battery module according to claim 9, It is characterized in that In the step of fixing and pressing the plurality of battery cells by means of the two conductive brackets, a portion of the conductive sheet is provided with a plurality of protrusions, and the plurality of battery cells are respectively connected by means of the plurality of protrusions.

11. The method for assembling a battery module according to claim 9, It is characterized in that After the step of fixing and pressing the plurality of battery cells by the two conductive brackets, the method further comprises: The fixing piece is inserted into the fixing hole of the battery bracket to fix and press the multiple battery cells and the conductive sheet.

12. The method for assembling a battery module according to claim 9, It is characterized in that After the step of fixing and pressing the plurality of battery cells by the two conductive brackets, the method further comprises: The buckle portion of one of the two conductive brackets is buckled with the buckle portion of the other one of the two conductive brackets to buckle the two conductive brackets.

Images