Battery module with tab support structure

Abstract

The application relates to the battery technical field, in particular to a battery module with tab support structure, which comprises a battery cell assembly, two first support members and a circuit board, the battery cell assembly comprises a plurality of battery cells which are sequentially stacked together, and any battery cell is formed with a tab; the two first support members are arranged at the same end of the battery cell assembly which is formed with the tab, and the two first support members are connected together; the two first support members are both formed with a plurality of first avoiding through holes which are sequentially arranged along a first preset direction; the circuit board is arranged on the side of the two first support members which is away from the battery cell assembly, and the two first support members are supported between the circuit board and the battery cell assembly. It can be seen that the first support members are additionally arranged between the circuit board and the battery cell, thereby limiting the relative movement between the circuit board and the battery pack, making the tab of the battery cell be in a tension state relative to the circuit board, and the problem that the tab is torn due to the movement of the tab relative to the circuit board can be avoided.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of batteries, in particular to a battery module with tab support structure. BACKGROUND

[0002] At present, a power battery comprises a battery pack and a PCB circuit board, and the circuit board is usually placed at one end of the battery pack, for example, the top end, where tabs are formed. The existing circuit board and battery pack are in soft contact, and under a certain impact, the two will produce relative displacement. At this time, the mass of the battery pack is much greater than that of the PCB circuit board, and the generated acceleration will pull the tabs welded together with the circuit board, causing damage to the tabs and affecting the normal use of the battery, such as charging and discharging. CONTENT OF THE UTILITY MODEL

[0003] The application aims to provide a battery module with tab support structure, which solves the technical problem in the prior art that the existing circuit board and battery pack are in soft contact, and under a certain impact, the two will produce relative displacement, the generated acceleration will pull the tabs welded together with the circuit board, causing damage to the tabs and affecting the normal use of the battery, such as charging and discharging.

[0004] The application provides a battery module with tab support structure, comprising: a cell assembly, two first support members and a circuit board; wherein the cell assembly comprises a plurality of cells stacked together along a first preset direction, and any cell is formed with a tab; the two first support members are arranged at the same end of the cell assembly where the tabs are formed, and the two first support members are connected together;

[0005] The two first support members are each formed with a plurality of first avoiding through holes arranged along the first preset direction; the circuit board is arranged on the side of the two first support members away from the cell assembly, and the two first support members are supported between the circuit board and the cell assembly, and the tabs of the cells are sequentially bent on the circuit board through the first avoiding through holes and the through holes on the circuit board.

[0006] In the above technical solution, further, the battery module with tab support structure further comprises at least one set of second support members, and each set of second support members comprises two second support members, and the two second support members are arranged on the side of the two first support members away from the cell assembly, and the two second support members are connected with the corresponding two first support members;

[0007] The two second support members are abutted against each other, and the two second support members are supported between the circuit board and the two first support members; each of the two first support members is formed with a plurality of second avoiding through holes arranged in sequence along a first preset direction, and is used for leading out the tab of the battery cell.

[0008] In any of the above technical solutions, further, the second support member is detachably connected with the corresponding first support member.

[0009] In any of the above technical solutions, further, the second support member is detachably connected with the corresponding first support member through a fastening member.

[0010] In any of the above technical solutions, further, the first support member is formed with a first threaded hole, the second support member is formed with a second threaded hole, the fastening member is formed with an external thread, and the fastening member is connected with the first threaded hole and the second threaded hole through threads respectively, and the connection position of the fastening member with the first threaded hole and the second threaded hole can be adjusted.

[0011] In any of the above technical solutions, further, the battery module with the tab support structure comprises a plurality of groups of second support members, and the thickness dimension of the second support member in the plurality of groups of second support members along the height direction of the tab of the battery cell is different.

[0012] In any of the above technical solutions, further, any of the second avoiding through holes also penetrates the side of the corresponding second support member close to the other second support member.

[0013] In any of the above technical solutions, further, the two second support members are abutted against each other along the length direction of the battery cell.

[0014] In any of the above technical solutions, further, the material of the two second support members is plastic material.

[0015] In any of the above technical solutions, further, the two second support members are of split structure or are of integral structure.

[0016] In any of the above technical solutions, further, the two first support members are of split structure and are detachably connected, or are of integral structure.

[0017] In any of the above technical solutions, further, when the two first support members are in a split structure and detachably connected, one of the two first support members is formed with a buckle, and the other is formed with a clamping groove, and the buckle is clamped in the clamping groove.

[0018] In any of the above technical solutions, further, any of the first avoiding through holes also penetrates the side of the corresponding first support member close to the other first support member.

[0019] In any of the above technical solutions, further, the two first support members are butted together along the length direction of the battery cell.

[0020] In any of the above technical solutions, further, the material of the two first support members is plastic material.

[0021] In any of the above technical solutions, further, along the height direction of the battery cell, at least one end of the battery cell is formed with the tab, and the tab of at least one end is provided with two first support members.

[0022] Compared with the prior art, the application has the following beneficial effects:

[0023] The battery module with the tab support structure provided by the application adds two first support members between the circuit board and the battery cell, thereby limiting the relative movement between the PCB circuit board and the battery module, and making the tab of the battery cell be in a tension state relative to the PCB circuit board, thereby effectively avoiding the problem that the tab of the battery cell is torn due to the large relative movement between the tab of the battery cell and the circuit board during use of the battery module, and thereby helping to prolong the service life of the battery. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0025] Figure 1 The first support member and the second support member provided by the embodiment of the application are provided with an exploded view;

[0026] Figure 2 The first support member and the second support member provided by the embodiment of the application are provided with an assembly view;

[0027] Figure 3 A structure schematic view of a first support member provided by the embodiment of the application is provided.

[0028] Figure 4 Another structural schematic view of the first support member provided for the embodiment of the present application;

[0029] Figure 5 An assembled sectional view of the first support member and the second support member provided for the embodiment of the present application;

[0030] Figure 6 A structural schematic view of the second support member provided for the embodiment of the present application;

[0031] Figure 7 Another assembled sectional view of the first support member and the second support member provided for the embodiment of the present application;

[0032] Figure 8 An assembled view of the battery cell assembly, the first support member, the second support member and the circuit board provided for the embodiment of the present application;

[0033] Figure 9 A partial enlarged structural schematic view of Figure 8 ;

[0034] Figure 10 An assembled view of the battery cell assembly, the first support member and the second support member provided for the embodiment of the present application;

[0035] Figure 11 A partial enlarged structural schematic view of Figure 10 .

[0036] Reference signs:

[0037] 1-battery cell assembly, 11-battery cell, 111-tab, 2-first support member, 21-first avoiding through hole, 22-first threaded hole, 23-buckle, 24-buckling groove, 3-second support member, 31-second avoiding through hole, 32-second threaded hole, 4-fastening member, 5-circuit board, a-first preset direction, b-length direction of the battery cell, c-height direction of the battery cell. DETAILED DESCRIPTION

[0038] The technical solutions of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments of the present application.

[0039] The components of the embodiments of the present application generally described and shown in the accompanying drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.

[0040] All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present application without creative labor shall fall within the scope of protection of the present application.

[0041] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0042] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The following refers to Figures 1 to 11 A battery module with a tab support structure is described according to some embodiments of the present application.

[0044] Referring to Figures 1 to 11 The embodiments of the present application provide a battery module with a tab support structure, comprising: a cell assembly 1, two first support members 2 and a circuit board 5; wherein the cell assembly 1 comprises a plurality of cells 11 stacked together along a first predetermined direction a, and any cell 11 is formed with a tab 111; the two first support members 2 are arranged at the same end of the cell assembly 1 where the tabs 111 are formed, and the two first support members 2 are connected together;

[0045] The two first support members 2 are each formed with a plurality of first avoiding through holes 21 arranged in sequence along the first predetermined direction a; the circuit board 5 is arranged on the side of the two first support members 2 away from the cell assembly 1, and the two first support members 2 are supported between the circuit board 5 and the cell assembly 1, and the tabs 111 of the cells 11 are bent on the circuit board 5 in sequence through the first avoiding through holes 21 and the through holes on the circuit board 5.

[0046] According to the above-described structure, the battery module with the tab support structure provided by the application adds two first support members 2 between the circuit board 5 and the battery cell 11, thereby limiting the relative movement between the PCB circuit board and the battery pack, and making the tab 111 of the battery cell 11 be in a tensioned state relative to the PCB circuit board, thereby effectively avoiding the problem of the tab 111 of the battery cell 11 tearing due to a large relative movement between the tab 111 and the circuit board 5 during use of the battery module, thereby helping to prolong the service life of the battery.

[0047] Further, preferably, only the top end of the battery cell 11 is formed with the tab 111 along the height direction c of the battery cell, and the tab 111 at the top end is provided with the two first support members 2. Of course, it is not limited to this, and the bottom end of the battery cell 11 can also be formed with the tab 111 along the height direction c of the battery cell, and at this time, the two first support members 2 are arranged at the bottom of the battery cell 11, or the top and bottom of the battery cell 11 are both provided with the tab 111 along the height direction c of the battery cell, and the tabs 111 at the top and bottom are both provided with the two first support members 2, or the tabs 111 at the top or bottom are provided with the two first support members 2, which is selected according to actual needs.

[0048] In addition, it also needs to be explained that the battery cell 11 is respectively formed with the positive and negative tabs 111 arranged at intervals along the length direction b of the battery cell, because two first support members 2 that are connected together are arranged in the application, and each first support member 2 is provided with a first avoiding through hole 21 for avoiding the corresponding positive or negative tab 111.

[0049] In addition, it also needs to be explained that: Figures 8 to 11 The tab 111 in the above-mentioned structure is not complete and does not include the structure of being bent on the circuit board 5, that is, does not include the structure of being bent on the circuit board 5.

[0050] Further, preferably, a limiting member can also be arranged above the circuit board 5, the limiting member is pressed on the circuit board 5, and along the height direction c of the battery cell, the limiting member abuts against the top of the circuit board 5 and the housing respectively, thereby playing a limiting role on the circuit board 5. Of course, it is not limited to this, and the limiting member can also not be arranged between the circuit board 5 and the top of the housing, which is selected according to actual needs.

[0051] Further, preferably, the first preset direction a is the width direction of the battery cell 11, that is, the thickness direction.

[0052] In this embodiment, preferably, as Figure 1 , Figure 2 , Figures 5 to 11As shown, the battery module with tab support structure also includes at least one set of second support members 3, and each set of second support members 3 includes two second support members 3, and the two second support members 3 are disposed on the side of the two first support members 2 away from the cell assembly 1, and the two second support members 3 are connected to the corresponding two first support members 2.

[0053] Two second support members 3 abut against each other, and preferably, they abut against each other along the length direction b of the battery cell, and the two second support members 3 are supported between the circuit board 5 and the two first support members 2; each of the two first support members 2 has a plurality of second clearance through holes 31 arranged sequentially along the first preset direction a, and is used to lead out the tabs 111 of the battery cell 11.

[0054] As can be seen from the structure described above, by adding a second support member 3 on the basis of the first support member 2, it can be adapted to battery cells 11 with different tab heights, that is, to battery cells 11 of different models. It can also avoid the problem of the tab being too long (or too short) due to poor tab bending during the manufacturing process, which would cause the distance between the PCB circuit board and the base of the tab to be too large or too small.

[0055] Furthermore, preferably, the battery module with the tab support structure includes multiple sets of second support members 3, and the thickness of the second support members 3 in the multiple sets of second support members 3 is different along the height direction of the tab 111 of the cell 11. That is, along the height direction of the tab 111 of the cell 11, i.e., the height direction c of the cell, the thickness of the second support members 3 in the multiple sets of second support members 3 is different (it should be noted that the thickness of the two second support members 3 in the same set is the same). This can accommodate cells 11 with different tab heights, i.e., different models of cells 11, and can also avoid the problem of tabs being too long (or too short) due to poor tab bending during manufacturing, resulting in the distance between the PCB circuit board and the base of the tab being too large or too small. Of course, it is not limited to this. Only one set of second support members 3 can be set. The design dimensions of the second support members 3 can be changed according to different usage requirements, as will be explained according to actual needs.

[0056] Furthermore, preferably, the two second support members 3 are separate structures, which facilitates assembly with the tab 111. Of course, it is not limited to this; the two second support members 3 can also be an integral structure, which can also meet the usage requirements.

[0057] It should be noted that in this embodiment, the first support member 2 and the second support member 3 coexist. Of course, it is not limited to this. In this embodiment, only the first support member 2 can be set, that is, the second support member 3 does not need to be set. The specific choice depends on the actual needs.

[0058] In this embodiment, preferably, as follows: Figure 1 and Figure 7 As shown, the second support member 3 is detachably connected to the corresponding first support member 2.

[0059] As can be seen from the structure described above, the second support member 3 and the corresponding first support member 2 are connected in a detachable manner, which facilitates installation and disassembly, and is especially convenient for later maintenance.

[0060] In this embodiment, preferably, as follows: Figure 1 and Figure 7 As shown, the second support member 3 and the corresponding first support member 2 are detachably connected by fastening members 4, such as screws or bolts.

[0061] As can be seen from the structure described above, in the actual assembly process, in order to facilitate the insertion of the first support member 2 and the second support member 3 into the tab 111 at the end of the battery cell 11, the thickness of both should be minimized. However, this may result in the two support members not being able to tighten the tab 111. If the second support member 3 and the corresponding first support member 2 are fastened together by the fastening member 4, the height of the second support member 3 and the first support member 2 can be adjusted so that the first support member 2 abuts against the end of the battery cell 11, the second support member 3 abuts against the circuit board 5, and the tab 111 is tightened relative to the circuit board 5. Of course, during installation, the first support member 2 can also be abutted against the end of the battery cell 11 and kept stationary. The second support member 3 can be adjusted by the fastening member 4, such as screws or bolts, so that the tab 111 is tightened relative to the circuit board 5. The specific operation process can be selected according to actual needs.

[0062] As can be seen, the second support member 3 and the first support member 2 are detachably connected by the second fastening member 4, such as screws or bolts. This allows for adjustment of the connection positions of the first support member 2, the second support member 3, and the fastening member 4. This satisfies the requirement that the tab 111 is in a taut state relative to the circuit board 5. It can also accommodate battery cells 11 with different tab heights, i.e., different models of battery cells 11. Furthermore, it can avoid the problem of the tab being too long (or too short) due to poor bending of the tab during manufacturing, which would result in the distance between the PCB circuit board and the base of the tab being too large or too small.

[0063] It should be noted that the second support member 3 is not limited to being detachably connected to the first support member 2 by fastening member 4 such as screws or bolts. The two can also be connected by a snap-fit ​​23, but in this case, the height position of the second support member 3 cannot be adjusted.

[0064] In this embodiment, preferably, as follows: Figure 3 , Figure 4 , Figure 6and Figure 7 As shown, the first support member 2 has a first threaded hole 22, the second support member 3 has a second threaded hole 32, and the fastening member 4 has an external thread. The fastening member 4 is connected to the first threaded hole 22 and the second threaded hole 32 by threads, and the connection position of the fastening member 4 with the first threaded hole 22 and the second threaded hole 32 can be adjusted.

[0065] As can be seen from the structure described above, the first support member 2 and the second support member 3 are both threadedly connected to the fastening member 4, thereby adjusting the position of the first support member 2 and the second support member 3 relative to the fastening member 4. This satisfies the requirement that the tab 111 is in a taut state relative to the circuit board 5, and can also accommodate battery cells 11 with different tab heights, that is, different models of battery cells 11. Moreover, it can also avoid the problem of the tab being too long (or too short) due to poor bending of the tab during the manufacturing process, which would cause the distance between the PCB circuit board and the root of the tab to be too large or too small.

[0066] In this embodiment, preferably, as follows: Figure 6 As shown, any second clearance through hole 31 also penetrates the side of the corresponding second support member 3 near the other second support member 3. It can be seen that the first support member 2 provided in this application is comb-shaped, and the second clearance through hole 31 with the aforementioned structure plays the role of avoiding the tab 111 and avoiding interference with the tab 111. Of course, it is not limited to this. The second clearance through hole 31 is designed to be long enough so that it will not interfere with the tab 111, and thus there is no need for the second clearance through hole 31 to penetrate the side of the first support member 2.

[0067] In this embodiment, preferably, as follows: Figure 1 , Figure 2 and Figure 11 As shown, the two second support members 3 abut against each other along the length direction b of the battery cell, which meets the usage requirements and facilitates assembly. Of course, it is not limited to this; the two second support members 3 can also abut against each other along the first preset direction a, that is, the width direction of the battery cell, etc., depending on the actual needs.

[0068] In this embodiment, preferably, both second support members 3 are made of plastic, which serves as insulation and protection.

[0069] Furthermore, preferably, the material of both second support members 3 can be PP or PVC. Of course, it is not limited to this and can be designed according to actual needs.

[0070] In this embodiment, preferably, as follows: Figure 1 and Figure 5 As shown, the two first support components 2 are a split structure and can be detachably connected.

[0071] As can be seen from the structure described above, the two first support components 2 adopt a detachable connection method, which facilitates assembly with the tab 111 and is especially convenient for later maintenance and other operations.

[0072] It should be noted that: not only that, the two first support components 2 can also be an integral structure, depending on the actual needs.

[0073] In this embodiment, preferably, as follows: Figures 3 to 5 As shown, one of the two first support members 2 has a buckle 23, and the other has a slot 24, and the buckle 23 is engaged in the slot 24.

[0074] As can be seen from the structure described above, the two first support members 2 are engaged by the buckle 23 and the slot 24, which is a detachable connection method that facilitates installation and disassembly.

[0075] Furthermore, preferably, along the length direction b of the battery cell, the buckle 23 and the slot 24 are respectively formed at one end of the corresponding first support member 2 near the other first support member 2, but of course, it is not limited to this.

[0076] It should be noted that the connection method of the two first support members 2 is not limited to the above. The two can also adopt a detachable connection method such as bolts.

[0077] In this embodiment, preferably, as follows: Figures 1 to 4 As shown, any first clearance through hole 21 also penetrates the side of the corresponding first support member 2 near the other first support member 2. It can be seen that the second support member 3 provided in this application is comb-shaped. The first clearance through hole 21 with the aforementioned structure plays the role of avoiding the tab 111 and avoiding interference with the tab 111. Of course, it is not limited to this. The first clearance through hole 21 is designed to be long enough so that it will not interfere with the tab 111, and thus there is no need for the first clearance through hole 21 to penetrate the side of the first support member 2.

[0078] In this embodiment, preferably, as follows: Figure 1 , Figure 2 and Figure 11 As shown, the two first support members 2 are joined together along the length direction b of the battery cell, which meets the usage requirements and facilitates assembly. Of course, it is not limited to this; the two first support members 2 can also be abutted together along the first preset direction a, that is, the width direction of the battery cell, etc., depending on the actual needs.

[0079] In this embodiment, preferably, both first support members 2 are made of plastic, which serves as insulation and protection.

[0080] Furthermore, preferably, the material of both first support members 2 can be PP or PVC. Of course, it is not limited to this and can be designed according to actual needs.

[0081] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery module with a tab support structure, characterized in that, include: The battery cell assembly includes a battery cell assembly, two first support members, and a circuit board; wherein the battery cell assembly includes a plurality of battery cells stacked sequentially along a first preset direction, and each of the battery cells has a tab; the two first support members are disposed at the same end of the battery cell assembly with the tab, and the two first support members are connected to each other. Both of the first support members are formed with a plurality of first clearance through holes arranged sequentially along the first preset direction; the circuit board is disposed on the side of the two first support members opposite to the cell assembly, and the two first support members are supported between the circuit board and the cell assembly, and the electrode tab of the cell passes through the first clearance through holes and the through holes on the circuit board in sequence and bends on the circuit board.

2. The battery module with tab support structure according to claim 1, characterized in that, The battery module with tab support structure further includes at least one set of second support members, and each set of second support members includes two second support members. The two second support members are disposed on the side of the two first support members away from the cell assembly, and the two second support members are connected to the corresponding two first support members. The two second support members abut against each other, and the two second support members are supported between the circuit board and the two first support members; Both of the first support members are formed with a plurality of second clearance through holes arranged sequentially along a first preset direction, and are used to lead out the tabs of the battery cell.

3. The battery module with tab support structure according to claim 2, characterized in that, The second support member is detachably connected to the corresponding first support member.

4. The battery module with tab support structure according to claim 3, characterized in that, The second support member is detachably connected to the corresponding first support member via a fastening member.

5. The battery module with tab support structure according to claim 4, characterized in that, The first support member has a first threaded hole, the second support member has a second threaded hole, the fastening member has an external thread, and the fastening member is connected to the first threaded hole and the second threaded hole respectively by threads, and the connection position of the fastening member with the first threaded hole and the second threaded hole can be adjusted.

6. The battery module with tab support structure according to claim 2, characterized in that, The battery module with tab support structure includes multiple sets of second support members, and the thickness of the second support members in the multiple sets of second support members is different along the height direction of the tab of the battery cell.

7. The battery module with tab support structure according to claim 2, characterized in that, Each of the second clearance holes also extends through the side of the corresponding second support member closest to the other second support member; and / or The two second support members abut against each other along the length of the cell; and / or Both of the second support members are made of plastic; and / or The two second support members are either separate structures or integrated structures.

8. The battery module with tab support structure according to claim 1, characterized in that, The two first support components are separate structures and can be detachably connected, or the two first support components are an integral structure.

9. The battery module with tab support structure according to claim 8, characterized in that, When the two first support members are a split structure and can be detachably connected, one of the two first support members forms a buckle, and the other forms a slot, and the buckle is engaged in the slot.

10. The battery module with a tab support structure according to any one of claims 1 to 9, characterized in that, Each of the first clearance holes also extends through the side of the corresponding first support member closest to the other first support member; and / or The two first support members are joined together along the length of the battery cell; and / or Both of the first support components are made of plastic; and / or Along the height direction of the battery cell, at least one end of the battery cell is formed with the tab, and the tab at at least one end is provided with two of the first support members.

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