Battery shell structure and battery

Abstract

The utility model relates to the technical field of lithium batteries, and discloses a battery shell structure and a battery, the battery shell structure comprises: a shell module, which comprises a shell body, a pole, an insulation assembly and a connecting sheet; the shell body comprises a top wall and a side wall; the pole is riveted and fixed with the top wall, and an insulating component is arranged between the pole and the top wall for insulation; one end of the connecting sheet is welded with the pole, and the other end is welded with the tab unit; a welding channel is formed in the top wall and is suitable for providing a welding space for the connecting sheet and the tab unit; the sealing plate module comprises a sealing plate body, and the sealing plate body is welded to the top wall; an anti-explosion hole and a liquid injection hole are formed in the sealing plate body; the distance between the two sides of the second direction of the welding channel and the edge of the top wall is A, A is larger than or equal to 3 mm, and / or 2 * A is larger than or equal to 1 / 3 * W, and W is the total width of the top wall in the second direction. According to the battery shell structure provided by the utility model, the strength of the shell and the overcurrent of the battery can be considered at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to a battery housing 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 housing is a core component for safety and assembly, and its structural design is crucial for the safety of the battery core. However, the existing lithium battery housings cannot simultaneously take into account the strength of the housing and the overcurrent of the battery, and the reliability of the battery needs to be improved. Summary of the Utility Model

[0003] In view of this, the utility model provides a battery housing structure and a battery to solve the problem that the existing lithium battery housing cannot simultaneously take into account the strength of the housing and the overcurrent of the battery.

[0004] In the first aspect, the utility model provides a battery housing structure, including:

[0005] A housing module, including a housing body, a pole column, an insulating component and a connecting piece;

[0006] The housing body includes a top wall and a side wall extending from the peripheral edge of the top wall in a first direction away from the top wall. The side wall and the top wall together enclose a receiving cavity, and a pole group module is adapted to be received in the receiving cavity; a pole ear unit is arranged on one side of the pole group module facing the top wall in the first direction;

[0007] The pole column is riveted and fixed to the top wall, and an insulating component is arranged between the pole column and the top wall for insulation; one end of the connecting piece in a third direction is welded to the pole column, and the other end is adapted to be welded to the pole ear unit;

[0008] A welding channel is formed on the top wall, and the welding channel is adapted to provide a welding space for the connecting piece and the pole ear unit;

[0009] A sealing plate module, including a sealing plate body, the sealing plate body is welded to the top wall, and the sealing plate body is adapted to close the welding channel; an explosion-proof hole and a liquid injection hole are formed on the sealing plate body;

[0010] The distance between the two sides of the welding channel in a second direction and the edge of the top wall is A, and A satisfies A≥3mm, and / or, 2×A≥1 / 3×W, where W is the total width of the top wall in the second direction.

[0011] Beneficial effects: For the battery housing structure provided by the present utility model, by forming a welding channel on the top wall of the housing body, the projection of the welding channel along the first direction simultaneously covers the connecting pieces of the positive and negative electrodes, thereby providing a welding space for the welding of the connecting piece and the ear unit, ensuring the welding area between the connecting piece and the ear unit, and thus guaranteeing the current-carrying capacity between the connecting piece and the ear unit; by arranging the sealing plate body to be welded to the top wall, the welding channel is closed by the sealing plate body, and by simultaneously arranging the explosion-proof hole and the liquid injection hole on the sealing plate body, not only is the setting flexible, so that it is convenient to adjust the size and position of the explosion-proof hole and the liquid injection hole on the sealing plate body according to actual production requirements, but also it can be avoided that the explosion-proof hole and the liquid injection hole affect or compress the area size of the welding channel, thereby ensuring the welding space between the connecting piece and the ear unit, ensuring the welding area between the connecting piece and the ear unit, and further guaranteeing the current-carrying capacity of the battery; the welding channel is formed by opening on the top wall of the housing body, the top wall and the side wall are integrally formed, and the distance A between the two sides of the welding channel in the second direction and the edge of the top wall satisfies A≥3mm, and / or, 2×A≥1 / 3×W, where W is the total width of the top wall in the second direction. This can not only ensure sufficient welding area between the connecting piece and the ear unit, guarantee the current-carrying capacity of the battery, but also ensure the anti-deformation ability of the housing body, guarantee the structural strength and stability of the housing body, and further take into account both the strength of the housing and the current-carrying capacity of the battery at the same time.

[0012] In an optional embodiment, the pole column includes a riveting portion, and the riveting portion is arranged on the side of the top wall away from the pole group module along the first direction;

[0013] The insulating component includes a first insulating member, and the first insulating member is arranged between the riveting portion and the top wall, and the first insulating member is adapted to insulate between the pole column and the top wall;

[0014] The distance B between the welding channel and the first insulating member in the third direction satisfies B≥3mm.

[0015] Beneficial effects: It can not only avoid the deformation of the first insulating member caused by the welding heat during the welding of the sealing plate body and the top wall, thereby ensuring the sealing between the pole column and the top wall, but also avoid the deformation of the top wall during the riveting process between the pole column and the top wall, guarantee the flatness of the top wall, and effectively prevent the top wall from cracking.

[0016] In an optional embodiment, the area of the welding channel is S, and S satisfies S≤1 / 3×W×L, where L is the total length of the top wall in the third direction.

[0017] Beneficial effects: Thus, the structural strength of the top wall is guaranteed.

[0018] In an optional embodiment, the sealing plate module further includes an explosion-proof sheet, and the explosion-proof sheet is welded to the sealing plate body, and the explosion-proof sheet is adapted to close the explosion-proof hole;

[0019] The distance between the explosion-proof piece and the edge of the sealing plate body is C, and C satisfies C≥3mm.

[0020] Beneficial effects: Thus, it can avoid the welding heat during the welding of the sealing plate body and the top wall from causing deformation or even cracking of the explosion-proof valve. At the same time, it can ensure the structural strength of the sealing plate body, avoid the sealing plate body from deforming itself when the explosion-proof valve is welded to the sealing plate body, ensure the sealing performance between the explosion-proof valve and the sealing plate body, and further ensure the consistency of the opening pressure of the explosion-proof valve.

[0021] In an optional embodiment, the liquid injection hole and the explosion-proof hole are relatively spaced apart along a third direction on the sealing plate body;

[0022] The distance between the liquid injection hole and the explosion-proof hole along the third direction is E, and E satisfies E≥2.5mm.

[0023] Beneficial effects: It can avoid the electrolyte residue during liquid injection from contaminating the explosion-proof valve.

[0024] In an optional embodiment, the insulating component further includes a second insulating member, and the second insulating member is disposed on one side of the top wall facing the electrode group module along a first direction, and the second insulating member is adapted to insulate the top wall and the tab unit;

[0025] An exhaust through-hole is formed in the second insulating member, and the exhaust through-hole is disposed opposite to the explosion-proof hole along the first direction, and the exhaust through-hole is adapted to communicate the accommodation cavity with the explosion-proof hole.

[0026] Beneficial effects: By forming an exhaust through-hole in the second insulating member, when the internal pressure of the battery is abnormal, the explosion-proof valve opens, and the thermal runaway gas inside the battery is discharged to the outside of the battery in time through the exhaust through-hole and the explosion-proof hole, ensuring the safety of the battery.

[0027] In an optional embodiment, an avoidance through-hole is further formed in the second insulating member; the tab unit is adapted to pass through the avoidance through-hole along the first direction and extend to the side of the connecting piece away from the electrode group module;

[0028] The distance between the tab unit and the inner peripheral wall of the avoidance through-hole along the third direction is D, and D satisfies D≥2.5mm.

[0029] Beneficial effects: It can avoid the welding heat during the welding of the tab unit and the connecting piece from causing the second insulating member to be heated and deformed, and ensure the insulation performance between the top wall and the tab unit by the second insulating member.

[0030] In a second aspect, the present invention further provides a battery, including: an electrode group module, and the battery housing structure as described above;

[0031] A tab unit is disposed on one side of the electrode group module facing the top wall along a first direction, and the tab unit has a first state vertically disposed along the first direction and a second state disposed at an angle with the first direction after being bent;

[0032] The tab unit is adapted to extend to the side of the connecting piece away from the electrode group module in the first direction in the first state; the tab unit is adapted to be welded to the connecting piece in the second state.

[0033] Advantageous effects: The battery of the second aspect includes the battery housing structure of the first aspect. Therefore, the battery of the second aspect includes all the advantageous effects of the battery housing structure of the first aspect. After the electrode group module is placed in the housing, by bending the tab unit from the first state to the second state in the welding channel and welding the tab unit to the connecting piece in the welding channel, not only is the welding area between the connecting piece and the tab unit ensured, thus guaranteeing the current-carrying capacity between the connecting piece and the tab unit, but also the bending process of the connecting piece is omitted, reducing the space occupied by the connecting piece in the first direction, improving the space utilization rate inside the battery, and enhancing the production efficiency; then the sealing plate body is welded to the top wall, thereby closing the welding channel through the sealing plate body. The explosion-proof hole and the liquid injection hole are both opened on the sealing plate body, avoiding the explosion-proof hole and the liquid injection hole from affecting or compressing the area of the welding channel on the top wall of the housing, ensuring the welding area between the connecting piece and the tab unit, and further guaranteeing the current-carrying capacity of the battery.

[0034] In an optional embodiment, the battery further includes a fourth insulating member disposed between the electrode group module and the connecting piece, and the fourth insulating member is adapted to insulate between the electrode group module and the connecting piece.

[0035] Advantageous effects: Thus, it is avoided that the connecting piece damages the electrode group module and that the connecting piece contacts the electrode plate of the electrode group module, causing an internal short circuit of the battery.

[0036] In an optional embodiment, the battery further includes a bottom plate, the bottom plate is disposed opposite to the top wall in the first direction, and the bottom plate is adapted to be welded to the side wall on the side away from the top wall in the first direction.

[0037] Advantageous effects: Thus, the electrode group module is fixed in the first direction by the bottom plate, and the capping and sealing of the housing body are realized. 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 also be obtained based on these drawings.

[0039] Figure 1 A three-dimensional view of a battery according to an embodiment of the present invention;

[0040] Figure 2 is Figure 1 the top view of the battery shown;

[0041] Figure 3 is Figure 2 the sectional view of the I-I section in ;

[0042] Figure 4 is Figure 3 the enlarged partial view at J in ;

[0043] Figure 5 is the three-dimensional view of the housing module of a battery housing structure according to an embodiment of the present invention;

[0044] Figure 6 is Figure 5 the top view of the housing module shown;

[0045] Figure 7 is Figure 6 the sectional view of the K-K section in ;

[0046] Figure 8 is Figure 7 the enlarged partial view at M in ;

[0047] Figure 9 is Figure 3 the sectional view of the sealing plate module in ;

[0048] Figure 10 is the three-dimensional view of the housing module, the pole group module and the bottom plate in the first state;

[0049] Figure 11 is Figure 10 the three-dimensional view of the connecting piece and the pole ear unit in the first state in ;

[0050] Figure 12 is the sectional view of the housing module, the pole group module and the bottom plate along the third direction in the first state;

[0051] Figure 13 is the three-dimensional view of the housing module, the pole group module and the bottom plate in the second state;

[0052] Figure 14 is Figure 13 the three-dimensional view of the connecting piece and the pole ear unit in the second state in ;

[0053] Figure 15 is the sectional view of the housing module, the pole group module and the bottom plate along the third direction in the second state.

[0054] Explanation of reference numerals:

[0055] 10. Housing module;

[0056] 11. Housing body; 111. Top wall; 1111. Welding channel; 112. Side wall;

[0057] 12. Terminal post; 121. Riveting part;

[0058] 13. Insulation assembly; 131. First insulation part; 132. Second insulation part; 1321. Exhaust through hole; 1322. Avoidance through hole; 133. Sealing ring;

[0059] 14. Connecting piece;

[0060] 20. Sealing plate module; 21. Sealing plate body; 211. Explosion-proof hole; 212. Liquid injection hole; 22. Explosion-proof sheet; 23. Third insulation part;

[0061] 30. Electrode group module; 31. Tab unit;

[0062] 40. Fourth insulation part;

[0063] 50. Bottom plate. Detailed implementation mode

[0064] 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. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0065] The following combines Figures 1 to 15 to describe the embodiments of the present utility model.

[0066] According to an embodiment of the present utility model, on the one hand, a battery housing structure is provided, including:

[0067] Housing module 10, as shown in Figure 7 , housing module 10 includes a housing body 11, a terminal post 12, an insulation assembly 13 and a connecting piece 14;

[0068] The housing body 11 includes a top wall 111 and a side wall 112 extending from the peripheral edge of the top wall 111 in a first direction away from the top wall 111. The top wall 111 and the side wall 112 are integrally formed, and the top wall 111 and the side wall 112 can bear force together, which is beneficial to improving the structural strength of the housing body 11; the side wall 112 and the top wall 111 jointly enclose a receiving cavity, and the receiving cavity is suitable for receiving the electrode group module 30; please also combine Figure 3 as shown, the electrode group module 30 is provided with a tab unit 31 on the side facing the top wall 111 in the first direction;

[0069] The terminal post 12 is riveted and fixed to the top wall 111, and an insulating component 13 is provided between the terminal post 12 and the top wall 111 for insulation; one end of the connecting piece 14 in the third direction is welded to the terminal post 12, and the other end is adapted to be welded to the tab unit 31;

[0070] Please refer to Figures 5 - 7 As shown, a welding channel 1111 is formed on the top wall 111, and the welding channel 1111 is adapted to provide a welding space for the connecting piece 14 and the tab unit 31;

[0071] the sealing plate module 20, please refer to Figure 9 As shown, the sealing plate module 20 includes a sealing plate body 21, the sealing plate body 21 is welded to the top wall 111, and the sealing plate body 21 is adapted to close the welding channel 1111; an explosion-proof hole 211 and a liquid injection hole 212 are formed on the sealing plate body 21;

[0072] Please refer to Figure 6 As shown, the distance between the two sides of the welding channel 1111 in the second direction and the edge of the top wall 111 is A, and A satisfies A≥3mm, and / or, 2×A≥1 / 3×W, where W is the total width of the top wall 111 in the second direction.

[0073] It should be noted that, please refer to Figure 7 As shown, by riveting and fixing the terminal post 12 to the top wall 111, an insulating component 13 is provided between the terminal post 12 and the top wall 111 for insulation, and the connecting piece 14 is welded to the terminal post 12, so that the housing module 10 forms an integral structure, which is convenient for overall supply and assembly, and improves production efficiency. Please refer to Figure 5 and Figure 7 As shown, two terminal posts 12 are provided on the top wall 111, one of which is used as the positive terminal post and the other is used as the negative terminal post. Connecting pieces 14 are welded to one side of the positive and negative terminal posts facing the electrode group module 30 along the first direction; the projection of the welding channel 1111 on the top wall 111 in the first direction covers the connecting pieces 14 of the positive and negative electrodes at the same time. On the one hand, it provides an operating space for the bending of the tab unit 31, and on the other hand, it provides a welding space for the welding of the connecting piece 14 and the tab unit 31, eliminating the bending process of the connecting piece 14, reducing the space occupied by the connecting piece 14 in the first direction, improving the space utilization rate inside the battery, and improving production efficiency. In addition, the shape of the welding channel 1111 can be Figure 5 the rectangle shown in

[0074] Please refer to Figure 6As shown, the distance between the two sides of the welding channel 1111 in the second direction and the edge of the top wall 111 is A. If A is too small, it is easy to reduce the anti-deformation ability of the top wall 111 and affect the structural stability of the top wall 111. Therefore, A needs to satisfy A≥3mm, and / or, 2×A≥1 / 3×W, where W is the total width of the top wall 111 in the second direction.

[0075] In the battery housing structure provided by the present utility model, by forming a welding channel 1111 on the top wall 111 of the housing body 11, the projection of the welding channel 1111 in the first direction simultaneously covers the connection tabs 14 of the positive and negative electrodes, thereby providing a welding space for the welding of the connection tabs 14 and the tab unit 31, ensuring the welding area between the connection tabs 14 and the tab unit 31, and thus ensuring the current-carrying capacity between the connection tabs 14 and the tab unit 31; by welding the sealing plate body 21 to the top wall 111, the welding channel 1111 is closed by the sealing plate body 21. By simultaneously providing the explosion-proof hole 211 and the liquid injection hole 212 on the sealing plate body 21, not only is the setting flexible, so that it is convenient to adjust the size and position of the explosion-proof hole 211 and the liquid injection hole 212 on the sealing plate body 21 according to actual production requirements, but also it can be avoided that the explosion-proof hole 211 and the liquid injection hole 212 affect or compress the area of the welding channel 1111, thereby ensuring the welding space between the connection tabs 14 and the tab unit 31, ensuring the welding area between the connection tabs 14 and the tab unit 31, and further ensuring the current-carrying capacity of the battery; the welding channel 1111 is formed on the top wall 111 of the housing body 11, the top wall 111 and the side wall 112 are integrally formed, and the distance A between the two sides of the welding channel 1111 in the second direction and the edge of the top wall 111 satisfies A≥3mm, and / or, 2×A≥1 / 3×W, where W is the total width of the top wall 111 in the second direction. This can not only ensure sufficient welding area between the connection tabs 14 and the tab unit 31 and ensure the current-carrying capacity of the battery, but also ensure the anti-deformation ability of the housing body 11 and ensure the structural strength and stability of the housing body 11, and thus simultaneously take into account the strength of the housing and the current-carrying capacity of the battery.

[0076] Further, please refer to Figure 3 As shown, the pole column 12 and the tab unit 31 are staggered in the first direction, avoiding the stacking of the pole column 12 and the tab unit 31 in the first direction, reducing the space occupied by the pole column 12 and the tab unit 31 in the first direction, and improving the space utilization rate inside the battery.

[0077] In some embodiments, please refer to Figure 8 As shown, the pole column 12 includes a riveting portion 121, and the riveting portion 121 is provided on the side of the top wall 111 away from the pole group module 30 in the first direction;

[0078] The insulating component 13 includes a first insulating member 131. The first insulating member 131 is disposed between the riveting portion 121 and the top wall 111, and the first insulating member 131 is adapted to insulate between the pole column 12 and the top wall 111.

[0079] The distance between the welding channel 1111 and the first insulating member 131 in the third direction is B, and B satisfies B≥3mm.

[0080] It should be noted that if the distance B between the welding channel 1111 and the first insulating member 131 in the third direction is too small, the welding heat during the welding of the sealing plate body 21 and the top wall 111 is likely to cause the first insulating member 131 to deform, affecting the sealing performance between the pole column 12 and the top wall 111. On the other hand, during the riveting process of the pole column 12 and the top wall 111, the top wall 111 will be deformed, which is likely to affect the flatness of the top wall 111 and even cause the top wall 111 to crack. Therefore, B needs to satisfy B≥3mm.

[0081] In this embodiment, by making the distance B between the welding channel 1111 and the first insulating member 131 in the third direction satisfy B≥3mm, not only can the welding heat during the welding of the sealing plate body 21 and the top wall 111 be prevented from causing the first insulating member 131 to deform, thus ensuring the sealing performance between the pole column 12 and the top wall 111, but also the deformation of the top wall 111 during the riveting process of the pole column 12 and the top wall 111 can be avoided, ensuring the flatness of the top wall 111 and effectively preventing the top wall 111 from cracking.

[0082] In some embodiments, the area of the welding channel 1111 is S, and S satisfies S≤1 / 3×W×L, where L is the total length of the top wall 111 in the third direction.

[0083] It should be noted that, as shown in Figure 6 W is the total width of the top wall 111 in the second direction, L is the total length of the top wall 111 in the third direction, and W×L represents the total area of the top wall 111. The area S of the welding channel 1111 satisfies S≤1 / 3×W×L, thereby ensuring the structural strength of the top wall 111.

[0084] In some embodiments, as shown in Figure 9 the sealing plate module 20 further includes an explosion-proof sheet 22. The explosion-proof sheet 22 is welded to the sealing plate body 21, and the explosion-proof sheet 22 is adapted to close the explosion-proof hole 211.

[0085] The distance between the explosion-proof sheet 22 and the edge of the sealing plate body 21 is C, and C satisfies C≥3mm.

[0086] It should be noted that, on the one hand, since the sealing plate body 21 needs to be welded to the top wall 111 to close the welding channel 1111 through the sealing plate body 21, the distance between the explosion-proof sheet 22 and the edge of the sealing plate body 21 cannot be too close. Otherwise, the welding heat during the welding of the sealing plate body 21 and the top wall 111 is likely to cause the explosion-proof sheet 22 to deform or even crack, affecting the normal initiation and opening of the explosion-proof sheet 22. On the other hand, if the distance between the explosion-proof sheet 22 and a local edge of the sealing plate body 21 is too close, the sealing plate body 21 is likely to deform itself during the welding of the explosion-proof sheet 22 and the sealing plate body 21, and the sealing performance between the explosion-proof sheet 22 and the sealing plate body 21 cannot be guaranteed, affecting the consistency of the opening pressure of the explosion-proof sheet 22. Therefore, the distance C between the explosion-proof sheet 22 and the edge of the sealing plate body 21 needs to satisfy C≥3mm.

[0087] In this embodiment, the distance C between the explosion-proof sheet 22 and the edge of the sealing plate body 21 satisfies C≥3mm, thereby avoiding the welding heat during the welding of the sealing plate body 21 and the top wall 111 from causing the explosion-proof sheet 22 to deform or even crack, while ensuring the structural strength of the sealing plate body 21, avoiding the sealing plate body 21 from deforming itself during the welding of the explosion-proof sheet 22 and the sealing plate body 21, ensuring the sealing performance between the explosion-proof sheet 22 and the sealing plate body 21, and further ensuring the consistency of the opening pressure of the explosion-proof sheet 22.

[0088] Further, please refer to Figure 4 and Figure 9 As shown, the sealing plate module 20 further includes a third insulating member 23. The third insulating member 23 is disposed on one side of the sealing plate body 21 facing the electrode group module 30 along the first direction. The third insulating member 23 is adapted to insulate between the sealing plate body 21 and the tab unit 31, thereby avoiding internal short circuit of the battery caused by the contact between the sealing plate body 21 and the tab unit 31.

[0089] In some embodiments, please refer to Figure 9 As shown, the liquid injection hole 212 and the explosion-proof hole 211 are relatively spaced apart along the third direction on the sealing plate body 21;

[0090] The distance between the liquid injection hole 212 and the explosion-proof hole 211 along the third direction is E, and E satisfies E≥2.5mm.

[0091] It should be noted that if the distance between the liquid injection hole 212 and the explosion-proof hole 211 is too small, the residual electrolyte during liquid injection is likely to contaminate the explosion-proof sheet 22. Therefore, the distance E between the liquid injection hole 212 and the explosion-proof hole 211 along the third direction needs to satisfy E≥2.5mm.

[0092] In some embodiments, please refer to Figure 8As shown, the insulation assembly 13 further includes a second insulation member 132. The second insulation member 132 is disposed on one side of the top wall 111 facing the electrode group module 30 along the first direction. The second insulation member 132 is adapted to insulate the top wall 111 from the tab unit 31, thereby preventing internal short circuit of the battery caused by contact between the top wall 111 and the tab unit 31.

[0093] Please also refer to Figure 3 and Figure 10 As shown, an exhaust through hole 1321 is formed in the second insulation member 132. The exhaust through hole 1321 is disposed opposite to the explosion-proof hole 211 along the first direction. The exhaust through hole 1321 is adapted to communicate the accommodation cavity with the explosion-proof hole 211.

[0094] In this embodiment, by forming the exhaust through hole 1321 in the second insulation member 132, when the internal pressure of the battery is abnormal, the explosion-proof sheet 22 is opened, and the thermal runaway gas inside the battery is timely discharged to the outside of the battery through the exhaust through hole 1321 and the explosion-proof hole 211, ensuring the safety of the battery.

[0095] Further, please refer to Figure 8 As shown, the insulation assembly 13 further includes a sealing ring 133. The sealing ring 133 is coaxially disposed with the pole column 12. The sealing ring 133 is disposed between the pole column 12 and the top wall 111. The sealing ring 133 is adapted to seal between the pole column 12 and the top wall 111.

[0096] In some embodiments, please refer to Figure 4 As shown, an avoidance through hole 1322 is further formed in the second insulation member 132; the tab unit 31 is adapted to pass through the avoidance through hole 1322 along the first direction and extend to the side of the connecting piece 14 away from the electrode group module 30;

[0097] The distance between the tab unit 31 and the inner peripheral wall of the avoidance through hole 1322 along the third direction is D, and D satisfies D≥2.5mm.

[0098] It should be noted that if the distance D between the tab unit 31 and the inner peripheral wall of the avoidance through hole 1322 along the third direction is too small, the welding heat during welding of the tab unit 31 and the connecting piece 14 is likely to cause the second insulation member 132 to be thermally deformed, affecting the insulation performance between the second insulation member 132 and the top wall 111 and the tab unit 31. Therefore, D needs to satisfy D≥2.5mm.

[0099] According to an embodiment of the present invention, on the other hand, a battery is further provided, including: an electrode group module 30, and the battery housing structure as described above;

[0100] On one side of the electrode group module 30 facing the top wall 111 along the first direction, there is an electrode tab unit 31. The electrode tab unit 31 has a first state vertically arranged along the first direction and a second state arranged at an angle with the first direction after being bent.

[0101] The electrode tab unit 31 is adapted to extend along the first direction to the side of the connecting piece 14 away from the electrode group module 30 in the first state; the electrode tab unit 31 is adapted to be welded to the connecting piece 14 in the second state.

[0102] It should be noted that, please refer to Figures 10 - 12 as shown, when the electrode tab unit 31 is in the first state, the electrode tab unit 31 is vertically arranged along the first direction; please refer to Figures 13 - 15 as shown, after the electrode group module 30 is put into the shell, the electrode tab unit 31 penetrates along the first direction to the side of the connecting piece 14 away from the electrode group module 30, and then the electrode tab unit 31 is bent by an angle of 90°, so that the electrode tab unit 31 is arranged at an angle with the first direction. At this time, the electrode tab unit 31 is in the second state, and the electrode tab unit 31 is attached to the side of the connecting piece 14 away from the electrode group module 30 along the first direction, and then the electrode tab unit 31 and the connecting piece 14 are welded through penetration, so as to lead the electric energy out of the battery through the connecting piece 14.

[0103] The battery provided by the present invention includes the above-mentioned battery housing structure. Therefore, the battery provided by the present invention includes all the beneficial effects of the above-mentioned battery housing structure. After the electrode group module 30 is put into the shell, the electrode tab unit 31 is bent from the first state to the second state in the welding channel 1111, and the electrode tab unit 31 and the connecting piece 14 are welded in the welding channel 1111, which not only ensures the welding area between the connecting piece 14 and the electrode tab unit 31, thus ensuring the current passing between the connecting piece 14 and the electrode tab unit 31, but also omits the bending process of the connecting piece 14, reduces the space occupied by the connecting piece 14 in the first direction, improves the space utilization rate inside the battery, and improves the production efficiency; then the sealing plate body 21 is welded to the top wall 111, so as to close the welding channel 1111 through the sealing plate body 21. The explosion-proof hole 211 and the liquid injection hole 212 are both opened on the sealing plate body 21, avoiding the explosion-proof hole 211 and the liquid injection hole 212 from affecting or compressing the area of the welding channel 1111 on the top wall 111, ensuring the welding area between the connecting piece 14 and the electrode tab unit 31, and further ensuring the current passing of the battery.

[0104] In some embodiments, please refer to Figure 3 as shown, the battery further includes a fourth insulating member 40. The fourth insulating member 40 is arranged between the electrode group module 30 and the connecting piece 14, and the fourth insulating member 40 is adapted to insulate between the electrode group module 30 and the connecting piece 14.

[0105] In this embodiment, by providing a fourth insulating member 40 between the electrode group module 30 and the connecting piece 14, the connecting piece 14 is prevented from damaging the electrode group module 30, and the connecting piece 14 is prevented from contacting the electrode plate of the electrode group module 30 to cause an internal short circuit of the battery.

[0106] In some embodiments, refer to Figure 12 and Figure 15 As shown, the battery further includes a bottom plate 50. The bottom plate 50 is disposed opposite to the top wall 111 in the first direction. The bottom plate 50 is adapted to be welded to the side wall 112 on the side away from the top wall 111 in the first direction, so as to fix the electrode group module 30 in the first direction through the bottom plate 50, and to cover and seal the housing body 11.

[0107] Although the embodiments of the present invention 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 invention, and such modifications and variations fall within the scope defined by the appended claims.

Claims

1. A battery housing structure, characterized in that: include: A housing module, comprising a housing body, a pole, an insulating assembly and a connecting piece; The shell body comprises a top wall and a side wall formed by the peripheral side edge of the top wall extending in a first direction away from the top wall, the side wall and the top wall together enclose a receiving cavity, and the receiving cavity is suitable for receiving a pole group module; the pole group module is provided with a pole ear unit on one side facing the top wall along the first direction; The pole is fixed to the top wall by riveting, and the insulating assembly is arranged between the pole and the top wall for insulation; one end of the connecting piece in the third direction is welded to the pole, and the other end is suitable for welding to the pole lug unit; A welding channel is provided on the top wall, and the welding channel is suitable for providing a welding space for the connecting sheet and the tab unit; The sealing plate module comprises a sealing plate body, the sealing plate body is welded to the top wall, and the sealing plate body is suitable for closing the welding channel; an explosion-proof hole and a liquid injection hole are opened on the sealing plate body; The distance between the edges of the top wall and both sides of the welding channel in the second direction is A, A satisfies A≥3 mm, and / or 2×A≥1 / 3×W, wherein W is the total width of the top wall along the second direction.

2. The battery housing structure according to claim 1, characterized in that: The pole comprises a riveted portion, and the riveted portion is arranged on a side of the top wall away from the pole group module along the first direction; The insulating assembly comprises a first insulating member, the first insulating member is arranged between the riveted portion and the top wall, and the first insulating member is suitable for insulating the pole from the top wall; A distance between the welding channel and the first insulating member along the third direction is B, and B satisfies B≥3 mm.

3. The battery housing structure according to claim 1, characterized in that: The area of ​​the welding channel is S, S satisfies S≤1 / 3×W×L, and L is the total length of the top wall along the third direction.

4. The battery housing structure according to claim 1, characterized in that: The sealing plate module further comprises an explosion-proof plate, which is welded to the sealing plate body and is suitable for sealing the explosion-proof hole; The distance between the explosion-proof plate and the edge of the sealing plate body is C, and C satisfies C≥3mm.

5. The battery housing structure according to claim 4, characterized in that: The injection hole and the explosion-proof hole are arranged on the sealing plate body in a relative spacing along a third direction; A distance between the injection hole and the explosion-proof hole along the third direction is E, and E satisfies E≥2.5mm.

6. The battery housing structure according to any one of claims 1 to 5, characterized in that: The insulating assembly further includes a second insulating member, which is disposed on a side of the top wall facing the pole group module along the first direction, and the second insulating member is suitable for insulating the top wall from the pole lug unit; The second insulating member is provided with an exhaust through hole, the exhaust through hole and the explosion-proof hole are arranged opposite to each other along a first direction, and the exhaust through hole is suitable for connecting the accommodating cavity with the explosion-proof hole.

7. The battery housing structure according to claim 6, characterized in that: The second insulating member is also provided with an avoidance through hole; the pole lug unit is suitable for passing through the avoidance through hole along the first direction and extending to a side of the connecting piece away from the pole group module; A distance between the tab unit and the inner peripheral wall of the avoidance through hole along the third direction is D, and D satisfies D≥2.5 mm.

8. A battery, characterized in that: include: A pole group module, and a battery housing structure as claimed in any one of claims 1 to 7; The pole group module is provided with a pole lug unit on one side of the pole group module facing the top wall along the first direction, and the pole lug unit has a first state of being vertically arranged along the first direction and a second state of being bent and arranged at an angle to the first direction; The pole lug unit is suitable for extending along the first direction to the side of the connecting piece away from the pole group module in the first state; and the pole lug unit is suitable for being welded to the connecting piece in the second state.

9. The battery according to claim 8, characterized in that The battery further includes a fourth insulating member, which is disposed between the electrode group module and the connecting sheet, and is suitable for insulating the electrode group module from the connecting sheet.

10. The battery according to claim 8, characterized in that The battery further comprises a bottom plate, which is arranged opposite to the top wall along a first direction, and is suitable for being welded to a side of the side wall away from the top wall along the first direction.

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