Battery cover plate structure and battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a battery cover plate structure and a battery, the battery cover plate structure comprises: a cover plate body provided with a first mounting hole; the connecting piece is mounted in the first mounting hole; an insulating component is arranged between the connecting piece and the cover plate body; the connecting piece comprises a first welding rib and a first connecting rib which extends from the first welding rib in the first direction towards the direction close to the pole group and penetrates through the first mounting hole, the first welding rib is arranged on the side, away from the pole group, of the cover plate body, and a second mounting hole is defined by the inner side peripheral wall of the first connecting rib; the connecting piece comprises a second welding rib and a third welding rib, the second welding rib is formed by stretching the connecting piece towards the direction close to the first welding rib along the first direction, the second welding rib is arranged in the second mounting hole, the second welding rib is suitable for being welded with the first welding rib, and the third welding rib is suitable for being welded with the tab unit. According to the battery cover plate structure provided by the utility model, the internal space utilization rate of the battery is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to a battery cover plate structure and a battery. Background Art

[0002] With the increasing maturity of lithium-ion battery technology, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage fields, and the requirements for the use performance and safety of lithium-ion batteries are increasing day by day. The lithium battery cover plate is a core component for safety and assembly, and its structural design is crucial for battery safety. However, the existing lithium battery cover plates occupy a large space inside the battery, reducing the space utilization rate inside the battery. Summary of the Utility Model

[0003] In view of this, the utility model provides a battery cover plate structure and a battery to solve the problem that the existing lithium battery cover plates occupy a large space inside the battery.

[0004] In a first aspect, the utility model provides a battery cover plate structure, which is disposed opposite to a pole group in a first direction. An ear unit is disposed on a side of the pole group facing the battery cover plate structure. The battery cover plate structure includes:

[0005] A cover plate body, on which a first mounting hole is formed;

[0006] A connecting member, which is installed in the first mounting hole; an insulating component is disposed between the connecting member and the cover plate body, and the insulating component is adapted to insulate and seal between the connecting member and the cover plate body;

[0007] The connecting member includes a first welding rib and a first connecting rib extending from the first welding rib in the first direction towards the pole group and passing through the first mounting hole. The first welding rib is disposed on a side of the cover plate body away from the pole group, and the inner peripheral wall of the first connecting rib encloses to form a second mounting hole;

[0008] A connecting piece, which includes a second welding rib and a third welding rib. The second welding rib is formed by stretching the connecting piece in the first direction towards the first welding rib. The second welding rib is disposed inside the second mounting hole, and the second welding rib is adapted to be welded to the first welding rib. The third welding rib is adapted to be welded to the ear unit.

[0009] Beneficial effects: In the battery cover plate structure provided by the present utility model, the connecting member is riveted and fixed to the cover plate body. The connecting member includes a first welding rib and a first connecting rib, and the connecting piece includes a second welding rib and a third welding rib. By penetrating and welding the first welding rib and the second welding rib, the electrical connection between the connecting member and the connecting piece is realized. This not only eliminates the component of the pole column, improves the space utilization rate inside the battery, reduces the weight of the battery, but also omits the welding process between the pole column and the connecting piece, thereby improving the production efficiency. The inner peripheral wall of the first connecting rib encloses to form a second mounting hole to accommodate the second welding rib through the second mounting hole, and at least part of the connecting piece in the first direction is placed inside the second mounting hole, thus reducing the space occupied by the connecting piece in the first direction and improving the space utilization rate inside the battery.

[0010] In an alternative embodiment, the connecting piece further includes a second connecting rib. The second connecting rib extends from the peripheral edge of the second welding rib in the first direction towards the pole group direction. The second connecting rib is placed inside the second mounting hole, and the second connecting rib is adapted to connect the second welding rib and the third welding rib.

[0011] The third welding rib is arranged on the side of the second connecting rib away from the second welding rib in the first direction.

[0012] Beneficial effects: Both the second welding rib and the second connecting rib are placed inside the second mounting hole. The second welding rib is penetrated and welded with the first welding rib to realize the electrical connection between the connecting member and the connecting piece. This not only eliminates the component of the pole column, but also greatly reduces the space occupied by the connecting piece in the first direction, improves the space utilization rate inside the battery, reduces the weight of the battery, and is beneficial to improving the production efficiency.

[0013] In an alternative embodiment, the tab unit and the connecting member are arranged in a staggered alignment in the first direction.

[0014] A welding channel is further formed on the cover plate body. The welding channel is arranged at an interval from the first mounting hole in the third direction. The welding channel is adapted to avoid the welding between the tab unit and the third welding rib.

[0015] Beneficial effects: By arranging the tab unit and the connecting member in a staggered alignment in the first direction, the stacking of the tab unit and the connecting member in the first direction is avoided, the space occupied by the tab unit and the connecting member in the first direction is reduced, which is beneficial to improving the space utilization rate inside the battery. By forming a welding channel on the cover plate body, the welding area between the connecting piece and the tab unit is ensured, thereby ensuring the current-carrying capacity between the connecting piece and the tab unit.

[0016] In an alternative embodiment, the tab unit has a first state vertically arranged in the first direction and a second state arranged at an angle with the first direction after being bent.

[0017] The tab unit is adapted to penetrate to the side of the third welding rib away from the electrode group in the first direction in the first state; the tab unit is adapted to be welded to the third welding rib in the second state.

[0018] Beneficial effects: In the manufacturing process, by penetrating the tab unit to the side of the third welding rib away from the electrode group in the first direction in the first state, and then bending the tab unit from the first state to the second state in the welding channel, the tab unit is arranged to be in contact with the side of the third welding rib away from the electrode group in the first direction. Then, the tab unit and the third welding rib are penetration-welded in the welding channel, which not only ensures the welding area between the connecting piece and the tab unit, thus ensuring the current-carrying capacity between the connecting piece and the tab unit, but also eliminates the bending process of the connecting piece, reduces the space occupied by the connecting piece and the tab unit in the first direction, improves the internal space utilization rate of the battery, and improves the production efficiency.

[0019] In an optional embodiment, the battery cover structure further includes a sealing plate, the sealing plate is welded to the cover body, and the sealing plate is adapted to close the welding channel.

[0020] Beneficial effects: By providing the sealing plate, after the tab unit and the third welding rib are welded in the welding channel, the sealing plate is then welded to the cover body, so as to close the welding channel through the sealing plate to achieve cover sealing.

[0021] In an optional embodiment, the battery cover structure further includes an insulating sheet, the insulating sheet is arranged on the side of the sealing plate facing the electrode group in the first direction, and the insulating sheet is adapted to insulate between the sealing plate and the tab unit.

[0022] Beneficial effects: Thus, it is possible to avoid internal short circuit of the battery caused by contact between the sealing plate and the tab unit.

[0023] In an optional embodiment, the insulating assembly includes a first insulating member, the first insulating member is arranged between the cover body and the connecting piece, and the first insulating member is adapted to insulate between the connecting piece and the cover body;

[0024] An avoidance through hole is formed in the first insulating member, the avoidance through hole is arranged opposite to the welding channel in the first direction, and the avoidance through hole is adapted to avoid the tab unit.

[0025] Beneficial effects: By providing a welding channel on the cover body and providing an avoidance through-hole on the first insulating member that is oppositely arranged to the welding channel, the welding channel and the avoidance through-hole jointly provide an operating space for the bending of the tab unit and the welding of the tab unit to the third welding rib. After the tab unit 71 is welded to the third welding rib, at least a part of the tab unit is located on the side of the third welding rib away from the electrode group in the first direction, and this part is located within the avoidance through-hole, thereby reducing the space occupied by the tab unit and the connecting piece in the first direction and improving the space utilization rate inside the battery.

[0026] In an alternative embodiment, the connecting member further includes a riveting rib, which is arranged around the circumferential edge of the first welding rib and is disposed on the side of the cover body away from the electrode group in the first direction;

[0027] The connecting member further includes a riveting plate, which is arranged on the side of the cover body close to the electrode group in the first direction, and the riveting plate is adapted to be welded to the first connecting rib;

[0028] The riveting plate and the riveting rib are adapted to rivet and fix the connecting member to the cover body.

[0029] Beneficial effects: The first welding rib, the first connecting rib, the riveting rib and the riveting plate of the connecting member jointly form a "π" - shaped structure to achieve the assembly with the cover body. At the same time, the inner circumferential wall of the first connecting rib encloses to form a second mounting hole, which enables both the second welding rib and the second connecting rib of the connecting piece to be placed inside the second mounting hole, not only saving the space occupied inside the battery, but also saving the pole column material and reducing the weight of the battery.

[0030] In a second aspect, the present utility model also provides a battery, including:

[0031] An electrode group;

[0032] A housing module, and the battery cover structure as described above;

[0033] The housing module includes a housing body, the housing body includes a bottom wall and a side wall extending from the circumferential edge of the bottom wall in a direction away from the bottom wall in the first direction. The side wall and the bottom wall jointly enclose a receiving cavity, and the receiving cavity is adapted to receive the electrode group; The side of the side wall away from the bottom wall in the first direction is adapted to be welded to the cover body.

[0034] Beneficial effects: The battery in the second aspect includes the battery cover structure in the first aspect. Therefore, the battery in the second aspect includes all the beneficial effects of the battery cover structure in the first aspect.

[0035] In an alternative embodiment, a liquid injection hole is further provided on the cover body;

[0036] An explosion-proof hole is provided on the bottom wall. The housing module further includes an explosion-proof valve, which is welded to the bottom wall and is adapted to close the explosion-proof hole.

[0037] Advantages: By providing an explosion-proof valve on the bottom wall of the housing body, the opening area on the cover body is reduced, which is beneficial to improving the structural strength of the cover body; by providing the liquid injection hole on the cover body and the explosion-proof valve on the bottom wall of the housing body, the liquid injection hole and the explosion-proof valve are respectively arranged on both sides of the battery housing in the first direction, avoiding the pollution of the explosion-proof valve by the electrolyte during liquid injection and improving the safety performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0039] Figure 1 It is a top view of a battery cover structure according to an embodiment of the present invention;

[0040] Figure 2 It is Figure 1 a cross-sectional view taken along the A-A section in

[0041] Figure 3 It is Figure 2 a cross-sectional view of the cover body shown in

[0042] Figure 4 It is Figure 2 a cross-sectional view of the connecting member shown in

[0043] Figure 5 It is Figure 2 a cross-sectional view of the connecting piece shown in

[0044] Figure 6 It is Figure 2 a partially enlarged schematic view at B in

[0045] Figure 7 It is Figure 1 a first three-dimensional view of the battery cover structure shown in

[0046] Figure 8 It is Figure 1 a second three-dimensional view of the battery cover structure shown in

[0047] Figure 9 It is a three-dimensional view of a battery according to an embodiment of the present invention;

[0048] Figure 10 Top view of a battery according to an embodiment of the present invention;

[0049] Figure 11 is Figure 10 Cross-sectional view of the C-C section in;

[0050] Figure 12 is Figure 11 Partial enlarged schematic view at D in;

[0051] Figure 13 is Figure 11 Cross-sectional view of the housing module of the battery shown in;

[0052] Figure 14 Stereo assembly drawing of the battery cover structure, the housing module and the electrode group in the first state;

[0053] Figure 15 is Figure 14 Stereo assembly drawing of the connecting piece and the tab unit in the first state in;

[0054] Figure 16 Cross-sectional view of the battery cover structure, the housing module and the electrode group along the third direction in the first state;

[0055] Figure 17 Stereo assembly drawing of the battery cover structure, the housing module and the electrode group in the second state;

[0056] Figure 18 is Figure 17 Stereo assembly drawing of the connecting piece and the tab unit in the second state in;

[0057] Figure 19 Cross-sectional view of the battery cover structure, the housing module and the electrode group along the third direction in the second state.

[0058] Explanation of reference numerals:

[0059] 10. Cover body; 101. First mounting hole; 102. Welding channel; 103. Liquid injection hole;

[0060] 20. Connecting piece; 201. Second mounting hole; 21. First welding rib; 22. First connecting rib; 23. Riveting rib; 24. Riveting plate;

[0061] 30. Insulation assembly; 31. First insulation part; 311. Avoidance through hole; 32. Second insulation part; 33. Sealing ring;

[0062] 40. Connecting piece; 41. Second welding rib; 42. Third welding rib; 43. Second connecting rib;

[0063] 50. Sealing plate;

[0064] 60. Insulating sheet;

[0065] 70. Electrode group; 71. Tab unit;

[0066] 80. Housing module; 81. Housing body; 811. Bottom wall; 8111. Explosion-proof hole; 812. Side wall; 82. Explosion-proof valve. Detailed implementation manner

[0067] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0068] The following will be combined with Figures 1 to 19 , to describe the embodiments of the present utility model.

[0069] According to an embodiment of the present utility model, on the one hand, a battery cover structure is provided, which is disposed opposite to the electrode group 70 along a first direction. A tab unit 71 is disposed on the side of the electrode group 70 facing the battery cover structure. The battery cover structure includes:

[0070] Cover plate body 10, please refer to Figure 3 as shown, on which a first mounting hole 101 is opened;

[0071] Connecting member 20, please also combine with Figure 2 as shown. The connecting member 20 is installed in the first mounting hole 101, and the connecting member 20 is riveted and fixed to the cover plate body 10; an insulating component 30 is disposed between the connecting member 20 and the cover plate body 10, and the insulating component 30 is adapted to insulate and seal between the connecting member 20 and the cover plate body 10;

[0072] Please also combine with Figure 4 and Figure 6 as shown. The connecting member 20 includes a first welding rib 21 and a first connecting rib 22 extending from the first welding rib 21 along the first direction toward the electrode group 70 and passing through the first mounting hole 101. The first welding rib 21 is disposed on the side of the cover plate body 10 away from the electrode group 70, and the inner peripheral wall of the first connecting rib 22 encloses to form a second mounting hole 201;

[0073] Connecting piece 40, please also combine with Figure 5 and Figure 6As shown, the connecting piece 40 includes a second welding rib 41 and a third welding rib 42. The second welding rib 41 is formed by stretching the connecting piece 40 in the first direction towards the first welding rib 21. The second welding rib 41 is placed inside the second mounting hole 201. The second welding rib 41 and the first welding rib 21 can be penetration welded. The third welding rib 42 is suitable for welding with the tab unit 71.

[0074] In the battery cover structure provided by the present utility model, the connecting piece 20 is riveted and fixed to the cover body 10. The connecting piece 20 includes a first welding rib 21 and a first connecting rib 22. The connecting piece 40 includes a second welding rib 41 and a third welding rib 42. By penetration welding the first welding rib 21 and the second welding rib 41, the electrical connection between the connecting piece 20 and the connecting piece 40 is realized. Not only is the component of the pole column omitted, the space utilization rate inside the battery is improved, the weight of the battery is reduced at the same time, but also the welding process between the pole column and the connecting piece is omitted, and the production efficiency is improved. The inner peripheral wall of the first connecting rib 22 forms a second mounting hole 201 by enclosing, so as to accommodate the second welding rib 41 through the second mounting hole 201, and at least part of the connecting piece 40 in the first direction is placed inside the second mounting hole 201, thereby reducing the space occupied by the connecting piece 40 in the first direction and improving the space utilization rate inside the battery.

[0075] It should be noted that by riveting and fixing the connecting piece 20 to the cover body 10, an insulating component 30 is arranged between the connecting piece 20 and the cover body 10 for insulation and sealing, and by penetration welding the second welding rib 41 and the first welding rib 21, the cover body 10, the connecting piece 20, the insulating component 30 and the connecting piece 40 form an integral module structure, which is convenient for overall supply and assembly and is beneficial to improving the production efficiency.

[0076] In some embodiments, please refer to Figure 5 As shown, the connecting piece 40 further includes a second connecting rib 43. The second connecting rib 43 extends from the peripheral edge of the second welding rib 41 in the first direction towards the pole group 70. Please also refer to Figure 4 and Figure 6 As shown, the second connecting rib 43 is placed inside the second mounting hole 201. The second connecting rib 43 is suitable for connecting the second welding rib 41 and the third welding rib 42;

[0077] The third welding rib 42 is arranged on the side of the second connecting rib 43 away from the second welding rib 41 in the first direction.

[0078] Further, the second welding rib 41, the third welding rib 42, and the second connecting rib 43 are integrally formed structures. The connecting piece 40 can be formed into the second welding rib 41, the third welding rib 42, and the second connecting rib 43 through stamping and stretching, which is beneficial to ensuring the structural strength of the connecting piece 40 and at the same time ensuring the welding strength between the second welding rib 41 and the first welding rib 21.

[0079] In this embodiment, both the second welding rib 41 and the second connecting rib 43 are built into the second mounting hole 201. The second welding rib 41 is welded to the first welding rib 21 through penetration welding, thereby realizing the electrical connection between the connecting member 20 and the connecting piece 40. This not only eliminates the component of the pole post, but also greatly reduces the space occupied by the connecting piece 40 in the first direction, improves the space utilization rate inside the battery, and at the same time reduces the weight of the battery, which is beneficial to improving production efficiency.

[0080] In some embodiments, please refer to Figure 11 As shown, the tab unit 71 and the connecting member 20 are arranged in a staggered alignment along the first direction;

[0081] Please also refer to Figure 3 and Figure 7 As shown, a welding channel 102 is further provided on the cover body 10. The welding channel 102 is spaced from the first mounting hole 101 along the third direction. The welding channel 102 is adapted to avoid the welding of the tab unit 71 and the third welding rib 42.

[0082] It should be noted that, please also refer to Figure 2 , Figure 7 and Figure 8 As shown, two connecting members 20 are provided on the cover body 10, and a connecting piece 40 is provided on one side of each connecting member 20 facing the electrode group 70; please refer to Figure 7 As shown, two welding channels 102 are provided on the cover body 10. The two welding channels 102 are both arranged between the two connecting members 20. The projection of each welding channel 102 along the first direction covers the third welding rib 42 of the corresponding connecting piece 40, thereby providing a welding space for the welding of the third welding rib 42 and the tab unit 71, ensuring the welding area between the connecting piece 40 and the tab unit 71, and thus ensuring the current-carrying capacity between the connecting piece 40 and the tab unit 71. The shape of the welding channel 102 can be Figure 7 the rectangle shown in

[0083] In this embodiment, by staggeredly aligning the tab unit 71 and the connecting member 20 in the first direction, the stacking of the tab unit 71 and the connecting member 20 in the first direction is avoided, the space occupied by the tab unit 71 and the connecting member 20 in the first direction is reduced, which is beneficial to improving the space utilization rate inside the battery; by forming a welding channel 102 on the cover body 10, the welding area between the connecting piece 40 and the tab unit 71 is ensured, thereby ensuring the current-carrying capacity between the connecting piece 40 and the tab unit 71.

[0084] In some embodiments, the tab unit 71 has a first state vertically arranged in the first direction and a second state arranged at an angle with the first direction after being bent.

[0085] The tab unit 71 is adapted to penetrate to the side of the third welding rib 42 away from the electrode group 70 along the first direction in the first state; the tab unit 71 is adapted to be welded to the third welding rib 42 in the second state.

[0086] It should be noted that, please also refer to Figures 14 - 16 As shown, when the tab unit 71 is in the first state, the tab unit 71 is vertically arranged in the first direction. After the electrode group 70 is put into the shell, the cover body 10 and the shell body 81 are assembled, and the tab unit 71 penetrates to the side of the third welding rib 42 away from the electrode group 70 along the first direction in the first state; please also refer to Figures 17 - 19 As shown, then the tab unit 71 is bent at an angle of 90°, so that the tab unit 71 is bent from the first state to the second state. At this time, the tab unit 71 is attached to the side of the third welding rib 42 away from the electrode group 70 along the first direction, and then the tab unit 71 and the third welding rib 42 are penetrated and welded in the welding channel 102, so as to lead the electric energy to the outside of the battery through the connecting piece 40.

[0087] In the manufacturing process, by penetrating the tab unit 71 to the side of the third welding rib 42 away from the electrode group 70 along the first direction in the first state, and then bending the tab unit 71 from the first state to the second state in the welding channel 102, so that the tab unit 71 is attached to the side of the third welding rib 42 away from the electrode group 70 along the first direction, and then the tab unit 71 and the third welding rib 42 are penetrated and welded in the welding channel 102, not only the welding area between the connecting piece 40 and the tab unit 71 is ensured, thereby ensuring the current-carrying capacity between the connecting piece 40 and the tab unit 71, but also the bending process of the connecting piece 40 is omitted, and the space occupied by the connecting piece 40 and the tab unit 71 in the first direction is reduced, the space utilization rate inside the battery is improved, and the production efficiency is increased.

[0088] In some embodiments, please refer to Figure 12As shown, the battery cover plate structure further includes a sealing plate 50. The sealing plate 50 is welded to the cover plate body 10, and the sealing plate 50 is adapted to close the welding channel 102.

[0089] By providing the sealing plate 50, after the tab unit 71 and the third welding rib 42 are welded in the welding channel 102, the sealing plate 50 is then welded to the cover plate body 10, so as to close the welding channel 102 through the sealing plate 50 and achieve cover plate sealing.

[0090] In some embodiments, please refer to Figure 12 As shown, the battery cover plate structure further includes an insulating sheet 60. The insulating sheet 60 is made of an insulating material. The insulating sheet 60 is disposed on one side of the sealing plate 50 facing the electrode group 70 in the first direction. The insulating sheet 60 is adapted to insulate between the sealing plate 50 and the tab unit 71, so as to avoid internal short circuit of the battery caused by contact between the sealing plate 50 and the tab unit 71.

[0091] Furthermore, please refer to Figure 12 As shown, the insulating sheet 60 is attached to one side of the sealing plate 50 facing the electrode group 70 in the first direction.

[0092] Furthermore, please refer to Figure 12 As shown, the insulating sheet 60 and the sealing plate 50 can be relatively fixed by bonding and / or snap connection, so that the insulating sheet 60 and the sealing plate 50 form an integral structural module, which is convenient for assembly and helps improve production efficiency.

[0093] In some embodiments, please also refer to Figure 6 and Figure 12 As shown, the insulating component 30 includes a first insulating member 31. The first insulating member 31 is disposed between the cover plate body 10 and the connecting piece 40. The first insulating member 31 is adapted to insulate between the connecting piece 40 and the cover plate body 10, so as to avoid internal short circuit of the battery caused by contact between the connecting piece 40 and the cover plate body 10;

[0094] An avoidance through hole 311 is formed on the first insulating member 31. The avoidance through hole 311 is disposed opposite to the welding channel 102 in the first direction. The avoidance through hole 311 is adapted to avoid the tab unit 71.

[0095] In this embodiment, by forming the welding channel 102 on the cover plate body 10 and forming the avoidance through hole 311 opposite to the welding channel 102 on the first insulating member 31, the welding channel 102 and the avoidance through hole 311 together provide an operating space for the bending of the tab unit 71 and the welding of the tab unit 71 and the third welding rib 42. Please refer to Figure 12As shown, after the pole lug unit 71 is welded to the third welding rib 42, at least a portion of the pole lug unit 71 is located on a side of the third welding rib 42 away from the pole group 70 along the first direction, and the portion is located within the avoidance through hole 311, thereby reducing the space occupied by the pole lug unit 71 and the connecting sheet 40 in the first direction and improving the internal space utilization of the battery.

[0096] In some embodiments, please combine Figure 4 and Figure 6 As shown, the connector 20 further includes a riveting rib 23, which is arranged around the circumferential edge of the first welding rib 21, and the riveting rib 23 is arranged on one side of the cover body 10 away from the pole group 70 along the first direction;

[0097] The connecting member 20 further includes a riveted plate 24, which is disposed on one side of the cover body 10 close to the pole group 70 along the first direction, and the riveted plate 24 is suitable for being welded to the first connecting rib 22;

[0098] The riveting plate 24 and the riveting rib 23 are suitable for riveting and fixing the connecting member 20 to the cover body 10 .

[0099] Furthermore, the first welding rib 21, the first connecting rib 22 and the riveted rib 23 are an integrally formed structure that can bear force as a whole. During the assembly process of the connecting piece 20 and the cover body 10, the riveted plate 24 is welded to the first connecting rib 22 to achieve riveting fixation of the connecting piece 20 and the cover body 10.

[0100] In this embodiment, the first welding rib 21, the first connecting rib 22, the riveted rib 23 and the riveted plate 24 of the connecting member 20 together form a "π"-shaped structure to achieve assembly with the cover body 10. At the same time, the inner peripheral wall of the first connecting rib 22 encloses the second mounting hole 201, which enables the second welding rib 41 and the second connecting rib 43 of the connecting plate 40 to be both built into the second mounting hole 201, which not only saves space inside the battery, but also saves pole material and reduces the weight of the battery.

[0101] For further information, see Figure 6 As shown, the insulating assembly 30 further includes a second insulating member 32 , which is disposed between the riveted rib 23 and the cover body 10 , and is suitable for insulating the connection member 20 from the cover body 10 .

[0102] For further information, see Figure 6 As shown, the insulating assembly 30 also includes a sealing ring 33, which is circumferentially arranged along the outer peripheral wall of the first connecting rib 22, and is arranged between the first connecting rib 22 and the cover body 10. The sealing ring 33 is suitable for insulating and sealing between the connecting member 20 and the cover body 10.

[0103] According to an embodiment of the present utility model, on the other hand, a battery is further provided, including:

[0104] A pole group 70;

[0105] A housing module 80, and the battery cover structure as described above;

[0106] Please refer to Figure 13 As shown, the housing module 80 includes a housing body 81. The housing body 81 includes a bottom wall 811 and a side wall 812 extending from the peripheral edge of the bottom wall 811 in a first direction away from the bottom wall 811. The side wall 812 and the bottom wall 811 together enclose a receiving cavity, and the receiving cavity is adapted to receive the pole group 70; the side of the side wall 812 away from the bottom wall 811 in the first direction is adapted to be welded to the cover body 10.

[0107] The battery provided by the present utility model includes the above battery cover structure. Therefore, the battery provided by the present utility model includes all the beneficial effects of the above battery cover structure.

[0108] In some embodiments, please refer to Figure 11 As shown, a liquid injection hole 103 is further opened on the cover body 10;

[0109] An explosion-proof hole 8111 is opened on the bottom wall 811. The housing module 80 further includes an explosion-proof valve 82. The explosion-proof valve 82 is welded to the bottom wall 811, and the explosion-proof valve 82 is adapted to close the explosion-proof hole 8111.

[0110] In this embodiment, by providing the explosion-proof valve 82 on the bottom wall 811 of the housing body 81, the opening area on the cover body 10 is reduced, which is beneficial to improving the structural strength of the cover body 10; by opening the liquid injection hole 103 on the cover body 10 and providing the explosion-proof valve 82 on the bottom wall 811 of the housing body 81, the liquid injection hole 103 and the explosion-proof valve 82 are respectively arranged on two sides of the battery housing in the first direction, avoiding the pollution of the explosion-proof valve 82 by the electrolyte during liquid injection, and improving the safety performance of the battery.

[0111] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. A battery cover plate structure is disposed opposite to the electrode group in a first direction, and an electrode tab unit is disposed on a side of the electrode group facing the battery cover plate structure, characterized in that, The battery cover plate structure includes: A cover plate body, on which a first mounting hole is provided; A connecting member installed in the first mounting hole; an insulating component is provided between the connecting member and the cover plate body, and the insulating component is adapted to insulate and seal between the connecting member and the cover plate body; The connecting member includes a first welding rib and a first connecting rib extending from the first welding rib in a first direction toward the pole group and passing through the first mounting hole. The first welding rib is provided on a side of the cover plate body away from the pole group, and a second mounting hole is formed by surrounding the inner peripheral wall of the first connecting rib; A connecting piece, including a second welding rib and a third welding rib. The second welding rib is formed by stretching the connecting piece in the first direction toward the first welding rib. The second welding rib is disposed inside the second mounting hole, and the second welding rib is adapted to be welded to the first welding rib, and the third welding rib is adapted to be welded to the pole ear unit.

2. The battery cover plate structure according to claim 1, characterized in that, The connecting piece further includes a second connecting rib, which extends from the peripheral edge of the second welding rib in the first direction toward the pole group. The second connecting rib is disposed inside the second mounting hole, and the second connecting rib is adapted to connect the second welding rib and the third welding rib; The third welding rib is provided on a side of the second connecting rib away from the second welding rib in the first direction; 3. The battery cover plate structure according to claim 1, wherein, The pole ear unit and the connecting member are arranged in a staggered alignment in the first direction; A welding channel is further provided on the cover plate body, and the welding channel is spaced from the first mounting hole in a third direction. The welding channel is adapted to avoid the welding between the pole ear unit and the third welding rib; 4. The battery cover plate structure according to claim 3, wherein, The pole ear unit has a first state vertically arranged in the first direction and a second state arranged at an angle with the first direction after being bent; The pole ear unit is adapted to penetrate to a side of the third welding rib away from the pole group in the first direction in the first state; the pole ear unit is adapted to be welded to the third welding rib in the second state.

5. The battery cover plate structure according to claim 3, wherein, The battery cover plate structure further includes a sealing plate, which is welded to the cover plate body, and the sealing plate is adapted to close the welding channel; 6. The battery cover plate structure according to claim 5, characterized in that, The battery cover plate structure further includes an insulating sheet, which is disposed on a side of the sealing plate facing the pole group in the first direction, and the insulating sheet is adapted to insulate between the sealing plate and the pole ear unit; 7. The battery cover plate structure according to claim 3, wherein, The insulating component includes a first insulating member, which is disposed between the cover plate body and the connecting piece, and the first insulating member is adapted to insulate between the connecting piece and the cover plate body; An avoidance through hole is formed in the first insulating member, and the avoidance through hole is arranged opposite to the welding channel in the first direction. The avoidance through hole is adapted to avoid the pole ear unit; 8. The battery cover plate structure according to any one of claims 1-7, characterized in that, The connecting member further includes a riveting rib, which is arranged around the circumferential edge of the first welding rib, and the riveting rib is provided on a side of the cover plate body away from the pole group in the first direction; The connecting member further includes a riveting plate, the riveting plate is disposed on a side of the cover body close to the electrode group along a first direction, and the riveting plate is adapted to be welded to the first connecting rib; The riveting plate and the riveting rib are adapted to rivet and fix the connecting member to the cover body.

9. A battery, characterized in that, Comprising: An electrode group; A housing module, and a battery cover structure according to any one of claims 1 to 8 above; The housing module includes a housing body, the housing body includes a bottom wall and a side wall extending from a peripheral edge of the bottom wall in a first direction away from the bottom wall, the side wall and the bottom wall together enclose a receiving cavity, and the receiving cavity is adapted to receive the electrode group; a side of the side wall away from the bottom wall along the first direction is adapted to be welded to the cover body.

10. The battery according to claim 9, characterized in that, A liquid injection hole is further formed in the cover body; An explosion-proof hole is formed in the bottom wall, the housing module further includes an explosion-proof valve, the explosion-proof valve is welded to the bottom wall, and the explosion-proof valve is adapted to close the explosion-proof hole.

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