Battery shell assembly and battery

Abstract

The utility model relates to the technical field of batteries, and provides a battery shell assembly and a battery. The battery shell assembly comprises a shell part, a pole and a fixing part, the fixing part is fixed on the shell part and is arranged around the same pole through hole, the fixing part and at least part of the shell part are of an integrally formed structure, the fixing part comprises at least two turned-over edges and at least two connecting ribs, and the adjacent turned-over edges are arranged at intervals and are connected through the connecting ribs; the outer edge, deviating from the pole through hole, of the connecting area of the turnup and the shell part comprises an arc line, the extending length of the arc line is a, the extending length of the outer edge, deviating from the pole through hole, of the connecting area of the connecting rib and the shell part is b, and a / b is larger than or equal to 0.3 and smaller than or equal to 2, so that the fixing stability of the turnup to the pole can be improved; and the condition that the stress is excessively concentrated in the forming process due to the fact that the flanging is too long is avoided, so that the damage probability of the flanging can be reduced, the reliable fixation of the post terminal can be ensured by the flanging, and the safe use performance of the battery shell assembly is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery housing component and a battery. Background Art

[0002] In the related art, the battery includes a pole and a shell member, and the pole can be fixed on the shell member to facilitate the electrical connection between the pole and the busbar when the batteries are grouped. The pole can be fixed by a riveted flange structure provided on the shell member, however, due to the structural limitation of the riveted flange structure itself, the fixing effect of the riveted flange structure may be poor. Utility Model Content

[0003] The utility model provides a battery housing component and a battery, so as to improve the use performance of the battery housing component.

[0004] According to a first aspect of the utility model, a battery housing assembly is provided, comprising:

[0005] A shell member, wherein a pole through hole is provided on the shell member;

[0006] A pole, at least a portion of which is inserted into the pole through hole;

[0007] A fixing part, the fixing part is fixed to the shell member and is arranged around the same pole through hole, the fixing part and at least part of the shell member are an integrally formed structure, the fixing part includes at least two flanges and at least two connecting ribs, adjacent flanges are arranged at intervals and connected by the connecting ribs, the minimum height of the flange extending from the shell member is greater than the maximum height of the connecting rib extending from the shell member, the flange fixes the pole, the fixing part protrudes from the outer surface of the shell member and extends outward, the flange is bent into a fixing section and a pressing section, the fixing section is fixed to the shell member, and the pressing section is pressed on the pole, so that at least part of the pole is clamped between the pressing section and the shell member;

[0008] The area where the flange is connected to the shell member and away from the outer edge of the pole through hole includes an arc line, the extension length of the arc line is a, the extension length of the area where the connecting rib is connected to the shell member and away from the outer edge of the pole through hole is b, and 0.3≤a / b≤2.

[0009] The battery shell assembly of the embodiment of the utility model includes a shell member, a pole and a fixing part. The pole is inserted into the pole through hole of the shell member. The fixing part is fixed on the shell member. The fixing part and at least part of the shell member are an integrally formed structure, and are bent into a fixing section and a pressing section to achieve reliable fixation of the pole. The fixing portion includes at least two flanges and at least two connecting ribs. Adjacent flanges are arranged at intervals and connected by connecting ribs. The minimum height of the flange extending from the shell member is greater than the maximum height of the connecting rib extending from the shell member. This not only facilitates the flange to form an effective fixation to the pole, but also facilitates the formation of the flange, prevents damage and cracking at the corner of the flange edge, and the connecting rib can also strengthen the shell member. The outer edge of the pole through hole away from the flange and the shell member includes an arc, and the extension length of the arc is a, and the extension length of the outer edge of the pole through hole away from the connecting rib and the shell member is b, 0.3≤a / b≤2, thereby improving the fixing stability of the flange to the pole, and avoiding the situation where the stress is too concentrated during the forming process due to the flange being too long, thereby reducing the probability of flange damage, thereby ensuring that the flange can form a reliable fixation to the pole, and improving the safe use performance of the battery shell assembly.

[0010] According to a second aspect of the utility model, a battery is provided, comprising a battery housing assembly and a battery cell, wherein the battery cell is electrically connected to a pole.

[0011] The battery shell assembly of the battery in the embodiment of the utility model includes a shell member, a pole and a fixing part. The pole is inserted into the pole through hole of the shell member. The fixing part is fixed on the shell member, and the fixing part and at least part of the shell member are an integrally formed structure, and are bent into a fixing section and a pressing section, so as to achieve reliable fixation of the pole. The fixing portion includes at least two flanges and at least two connecting ribs. Adjacent flanges are arranged at intervals and connected by connecting ribs. The minimum height of the flange extending from the shell member is greater than the maximum height of the connecting rib extending from the shell member. This not only facilitates the flange to form an effective fixation to the pole, but also facilitates the formation of the flange, prevents damage and cracking at the corner of the flange edge, and the connecting rib can also strengthen the shell member. The outer edge of the pole through hole away from the flange and the shell member includes an arc, and the extension length of the arc is a, and the extension length of the outer edge of the pole through hole away from the connecting rib and the shell member is b, 0.3≤a / b≤2, thereby improving the fixing stability of the flange to the pole, and avoiding the situation where the stress is too concentrated during the forming process due to the flange being too long, thereby reducing the probability of flange damage, thereby ensuring that the flange can form a reliable fixation to the pole, and improving the safe use performance of the battery shell assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to better understand the present disclosure, reference may be made to the embodiments shown in the following drawings. The components in the drawings are not necessarily to scale, and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, related elements or components may have different arrangements as known in the art. In addition, in the drawings, the same reference numerals represent the same or similar components in each drawing. Among them:

[0013] Figure 1 is a schematic structural diagram of a battery housing assembly according to an exemplary embodiment;

[0014] Figure 2 is a partial structural schematic diagram of a battery housing assembly according to a first exemplary embodiment;

[0015] Figure 3 is a partial structural schematic diagram of a battery housing assembly according to a second exemplary embodiment;

[0016] Figure 4 is a partial structural schematic diagram of a battery housing assembly according to a third exemplary embodiment;

[0017] Figure 5 is a schematic diagram of a partial cross-sectional structure of a battery housing assembly according to an exemplary embodiment;

[0018] Figure 6 is another partial cross-sectional structural schematic diagram of a battery housing assembly according to an exemplary embodiment;

[0019] Figure 7 is a schematic diagram of a partial cross-sectional structure of a battery according to an exemplary embodiment.

[0020] The following are the descriptions of the reference numerals:

[0021] 10. Shell member; 11. Pole through hole; 12. Outer surface; 13. Liquid injection hole; 20. Pole; 30. Fixing portion; 31. Flanging; 311. Fixing section; 312. Pressing section; 3121. End face; 32. Connecting rib; 321. Top face; 33. First part; 34. Second part; 40. Insulating member; 41. Top end; 50. Battery cell. DETAILED DESCRIPTION

[0022] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.

[0023] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0024] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.

[0025] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0026] An embodiment of the present invention provides a battery housing assembly, please refer to Figures 1 to 6The battery housing assembly includes: a housing member 10, on which a pole through hole 11 is provided; a pole 20, at least a portion of which is inserted into the pole through hole 11; a fixing portion 30, the fixing portion 30 is fixed to the housing member 10 and is arranged around the same pole through hole 11, the fixing portion 30 and at least a portion of the housing member 10 are an integrally formed structure, the fixing portion 30 includes at least two flanges 31 and at least two connecting ribs 32, adjacent flanges 31 are arranged at intervals and connected by the connecting ribs 32, and the minimum height of the flange 31 extending from the housing member 10 is greater than the maximum height of the connecting rib 32 extending from the housing member 10 The flange 31 fixes the pole 20, the fixing portion 30 protrudes from the outer surface 12 of the shell 10 and extends outward, the flange 31 is bent into a fixing section 311 and a pressing section 312, the fixing section 311 is fixed to the shell 10, and the pressing section 312 is pressed on the pole 20, so that at least part of the pole 20 is clamped between the pressing section 312 and the shell 10; wherein, the outer edge of the area where the flange 31 is connected to the shell 10 away from the pole through hole 11 includes an arc, the extension length of the arc is a, the extension length of the area where the connecting rib 32 is connected to the shell 10 away from the outer edge of the pole through hole 11 is b, 0.3≤a / b≤2.

[0027] A battery housing assembly according to an embodiment of the utility model includes a housing member 10, a pole 20 and a fixing portion 30. The pole 20 is inserted into the pole through hole 11 of the housing member 10. The fixing portion 30 is fixed to the housing member 10. The fixing portion 30 and at least a part of the housing member 10 are an integrally formed structure, and are bent into a fixing section 311 and a pressing section 312, so as to achieve reliable fixation of the pole 20. The fixing portion 30 includes at least two flanges 31 and at least two connecting ribs 32. Adjacent flanges 31 are arranged at intervals and connected by connecting ribs 32. The minimum height of the flange 31 extending from the housing member 10 is greater than the maximum height of the connecting rib 32 extending from the housing member 10. This not only facilitates the flange 31 to effectively fix the pole 20, but also facilitates the formation of the flange 31, preventing damage and cracking at the edge corners of the flange 31. The connecting rib 32 can also strengthen the housing member 10, and the flange 31 is connected to the housing member 10. The outer edge of the region away from the pole through hole 11 includes an arc line, the extension length of the arc line is a, and the extension length of the region where the connecting rib 32 is connected to the shell member 10 away from the outer edge of the pole through hole 11 is b, 0.3≤a / b≤2, thereby improving the fixing stability of the flange 31 to the pole 20, and avoiding the situation where the flange 31 is too long and causes excessive stress concentration during the forming process, thereby reducing the probability of damage to the flange 31, thereby ensuring that the flange 31 can form a reliable fixation to the pole 20, thereby improving the safe use performance of the battery shell assembly.

[0028] It should be noted that, combined with Figure 4As shown, the shell 10 is provided with a pole through hole 11, and at least a portion of the pole 20 is inserted into the pole through hole 11, so that the pole 20 can be used to be electrically connected to the pole lug of the battery cell.

[0029] Combination Figure 3 As shown, a fixing portion 30 is provided on the housing 10 , and the fixing portion 30 is arranged around the same pole through hole 11 , so that the pole 20 can be fixed by the fixing portion 30 to prevent the pole 20 from being separated from the housing 10 .

[0030] The fixing portion 30 and the shell member 10 are an integrally formed structure, which can not only ensure the connection and fixing ability between the fixing portion 30 and the shell member 10, but also reduce the probability of damage to the shell member 10 during the molding process, thereby improving the safety performance of the battery shell assembly and ensuring the fixing ability of the fixing portion 30 to the pole 20.

[0031] Combination Figure 1 As shown, the fixing portion 30 includes at least two flanges 31 and at least two connecting ribs 32 . Adjacent flanges 31 are spaced apart and connected by the connecting ribs 32 , thereby enabling the connecting ribs 32 to reinforce the structure of the flanges 31 .

[0032] The fixing portion 30 may be integrally formed with the shell member 10, that is, in the process of forming the shell member 10, excess material is squeezed out to form the fixing portion 30. For example, a vertical section is first formed, and the vertical sections are rolled to have different heights. A relatively large height may form a flange 31, and a relatively small height may form a connecting rib 32.

[0033] Specifically, during molding, a protrusion can be pushed outward as a whole at the pole through hole 11 of the shell member 10, and then the protrusion located on the long side is extruded to form a fixing surface at the pole through hole 11, and a connecting rib 32 is formed on the surface of the protruding shell member 10. The protrusion located on the narrow side is still a protruding structure after extrusion, and a part of it forms a fixing surface at the pole through hole 11. The protrusion that is still a protruding structure is subsequently rolled to form a flange 31 to fix the pole 20, so that a shorter fixing structure can be used to fix a larger pole 20. When the batteries are grouped, the welding surface between the pole 20 and the busbar can be increased. At the same time, this structure can reduce the stress of the flange 31 after the pole 20 is fixed by flange rolling.

[0034] The minimum height of the flange 31 extending from the shell 10 is greater than the maximum height of the connecting rib 32 extending from the shell 10 , that is, the flange 31 is relatively high, so that the flange 31 can be easily fixed to the pole 20 .

[0035] The minimum height of the flange 31 extending from the shell member 10 is the minimum height dimension of the flange 31 obtained along the direction in which the flange 31 extends from the shell member 10. The direction in which the flange 31 extends from the shell member 10 can be considered as a direction perpendicular to the surface of the shell member 10 on which the pole through hole 11 is provided. For example, the flange 31 can be a bent structure. At this time, when obtaining the minimum height of the flange 31 extending from the shell member 10, it can be considered as the dimension obtained after flattening the flange 31 along the direction perpendicular to the surface of the shell member 10 on which the pole through hole 11 is provided.

[0036] Correspondingly, the maximum height of the connecting rib 32 extending from the shell member 10 can also be considered to be the maximum height dimension of the connecting rib 32 extending from the shell member 10 obtained by making the extending direction of the connecting rib 32 perpendicular to the surface of the shell member 10 on which the pole through hole 11 is provided. For example, the connecting rib 32 can be a straight structure, and the extending direction of the connecting rib 32 is perpendicular to the surface of the shell member 10 on which the pole through hole 11 is provided, so that the maximum height of the connecting rib 32 extending from the shell member 10 can be conveniently measured.

[0037] Combination Figure 2 As shown, the outer edge of the area where the flange 31 is connected to the shell 10 away from the pole through hole 11 includes an arc line, the extension length of the arc line is a, and the extension length of the area where the connecting rib 32 is connected to the shell 10 away from the outer edge of the pole through hole 11 is b.

[0038] The ratio of the extension length a of the arc to the extension length b of the outer edge of the connecting rib 32 connected to the housing 10 away from the pole through hole 11 can be 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 0.65, 0.7, 0.75, 0.8, 0.85, 0.9, 0.95, 1, 1.05, 1.1, 1.15, 1.2, 1.25, 1.3, 1.35, 1.4, 1.45, 1.5, 1.55, 1.6, 1.65, 1.7, 1.75, 1.8, 1.85, 1.9, 1.95 or 2, etc.

[0039] For example, when 0.3≤a / b≤2 is satisfied, the extension length a of the arc can be 20mm, 22mm, 25mm, 28mm, 30mm, 32mm, 34mm, 35mm, 36mm, etc., which is not limited here. The extension length b of the area where the connecting rib 32 is connected to the shell member 10 away from the outer edge of the pole through hole 11 can be 20mm, 22mm, 25mm, 28mm, 29mm, 30mm, 32mm, 34mm, 35mm, 36mm, etc., which is not limited here.

[0040] A connecting rib 32 is provided between two adjacent flanges 31 to facilitate the formation of the flange 31 of the shell member 10 during the process of manufacturing and prevent damage and cracking at the edge corners of the flange 31. The connecting rib 32 has a certain reinforcing effect on the shell member 10. At the same time, the length of the connecting rib 32 is set to be greater than the length of the flange 31, that is, the flange 31 is provided on the short side to improve the stability of the fixation of the pole 20. The flange 31 is too long, resulting in excessive material of the flange 31 during rolling. Since the flange 31 on the pole 20 is not a complete circle, excessive material will be located at both ends of the flange 31 during rolling, resulting in excessive material at both ends, excessive stress concentration, and an overly sharp structure. Therefore, by 0.3≤a / b≤2, the risk of structural failure of the flange 31 can be effectively reduced, thereby achieving effective fixation of the pole 20.

[0041] like Figure 5 As shown, the flange 31 is bent into a fixed section 311 and a pressing section 312. The fixed section 311 is fixed to the shell member 10, and the pressing section 312 is pressed onto the pole 20, so that at least part of the pole 20 is clamped between the pressing section 312 and the shell member 10, so that the pole 20 can be stably fixed to the shell member 10, preventing the pole 20 from detaching from the shell member 10 along the center line direction of the pole through hole 11, thereby improving the safe use performance of the battery shell assembly.

[0042] After the fixing portion 30 is formed on the shell member 10, the flange 31 and the connecting rib 32 can both be vertical sections. After the pole 20 is installed in the pole through hole 11, the flange 31 can be rolled to bend the flange 31 into a fixing section 311 and a pressing section 312. The pressing section 312 is pressed onto the pole 20, thereby enabling the fixing portion 30 to effectively fix the pole 20.

[0043] In one embodiment, the shell member 10 is a cover plate, which not only facilitates the molding of the fixing portion 30 and the shell member 10 , but also facilitates the arrangement of the pole 20 , thereby improving the molding efficiency of the battery shell assembly.

[0044] In one embodiment, the housing 10 may include a bottom wall disposed opposite to the cover plate and a side wall connected to the bottom wall, and a pole through hole 11 may be disposed on the bottom wall.

[0045] In one embodiment, the area where the connecting rib 32 is connected to the shell member 10 is a straight line away from the outer edge of the pole through hole 11, that is, the dimension b is the dimension of a straight line segment, which not only facilitates the forming of the connecting rib 32, but also avoids the connecting rib 32 occupying a larger width direction of the shell member 10, thereby improving the space utilization of the battery shell assembly.

[0046] It should be noted that, in certain embodiments, it is not excluded that the outer edge of the area where the connecting rib 32 is connected to the housing 10 away from the pole through hole 11 includes an arc line.

[0047] In one embodiment, the angle between the direction in which the fixing section 311 extends from one end connected to the shell member 10 to the other end of the fixing section 311 away from the shell member 10 and the outer surface 12 of the shell member 10 on which the pole through hole 11 is provided is 30°-150°. This ensures that the fixing section 311 can effectively limit the pole 20, thereby ensuring the fixing ability of the pole 20 and facilitating the molding of the fixing section 311, thereby improving the molding efficiency of the battery shell assembly.

[0048] The angle between the direction in which the fixing section 311 extends from one end connected to the housing 10 to the other end of the fixing section 311 away from the housing 10 and the outer surface 12 of the housing 10 provided with the pole through hole 11 can be 30°, 32°, 35°, 38°, 40°, 42°, 45°, 48°, 50°, 52°, 55°, 58°, 60°, 62°, 65°, 68°, 70°, 72°, 75°, 76°, 77°, 78°, 79°, 80°, 81°, 82°, 83°, 84°, 85°, 86°, 87°, 88°, 89°, 90°, 91°, 92°, 93°, 94°, 95°, 96°, 97°, 98°, 99°, 100°, 101°, 102°, 103°, 104°, 105°, 106°, 107°, 108°, 109°, 110° , 78°, 80°, 82°, 85°, 88°, 90°, 92°, 95°, 98°, 100°, 102°, 105°, 108°, 110°, 112°, 115°, 118°, 120°, 122°, 125°, 128°, 130°, 132°, 135°, 138°, 140°, 142°, 145°, 148° or 150°, etc.

[0049] In one embodiment, the angle between the fixing section 311 and the pressing section 312 is 40°-140°. On the basis of ensuring the connection strength between the fixing section 311 and the pressing section 312, the pole 20 can be reliably fixed, and the problem of stress concentration between the fixing section 311 and the pressing section 312 can be reduced to avoid the risk of fracture.

[0050] The angle between the fixing section 311 and the pressing section 312 can be 40°, 42°, 45°, 48°, 50°, 52°, 55°, 58°, 60°, 62°, 65°, 68°, 70°, 72°, 75°, 78°, 80°, 82°, 85°, 88°, 90°, 92°, 95°, 98°, 100°, 102°, 105°, 108°, 110°, 112°, 115°, 118°, 120°, 122°, 125°, 128°, 130°, 132°, 135°, 138° or 140°, etc.

[0051] In one embodiment, the angle between the connecting rib 32 extending from one end connected to the shell member 10 to the other end of the connecting rib 32 away from the shell member 10 and the outer surface 12 of the shell member 10 where the pole through hole 11 is provided is 30°-150°. On the basis of ensuring that the connecting rib 32 can effectively limit the pole 20, the fixing ability of the pole 20 is guaranteed, and the molding of the connecting rib 32 is also facilitated, thereby improving the molding efficiency of the battery shell assembly.

[0052] The angle between the direction in which the connecting rib 32 extends from one end connected to the shell member 10 to the other end of the connecting rib 32 away from the shell member 10 and the outer surface 12 of the shell member 10 provided with the pole through hole 11 can be 30°, 32°, 35°, 38°, 40°, 42°, 45°, 48°, 50°, 52°, 55°, 58°, 60°, 62°, 65°, 68°, 70°, 72°, 75° , 78°, 80°, 82°, 85°, 88°, 90°, 92°, 95°, 98°, 100°, 102°, 105°, 108°, 110°, 112°, 115°, 118°, 120°, 122°, 125°, 128°, 130°, 132°, 135°, 138°, 140°, 142°, 145°, 148° or 150° and so on.

[0053] In one embodiment, in combination Figure 4 As shown, the direction in which the fixing section 311 extends from one end connected to the shell member 10 to the other end of the fixing section 311 away from the shell member 10 is perpendicular to the outer surface 12 of the shell member 10 provided with the pole through hole 11, the end surface 3121 of the pressing section 312 away from the shell member 10 is parallel to the outer surface 12, and the direction in which the connecting rib 32 extends from one end connected to the shell member 10 to the other end of the connecting rib 32 away from the shell member 10 is parallel to the direction in which the fixing section 311 extends from one end connected to the shell member 10 to the other end of the fixing section 311 away from the shell member 10, that is, in the molding process of the fixing portion 30, it can be first molded into a vertical section, thereby improving the molding efficiency of the fixing portion 30, and also facilitating the installation of the pole 20, thereby achieving effective fixation of the pole 20 by bending the flange 31.

[0054] In one embodiment, along the direction perpendicular to the outer surface 12 of the shell member 10 on which the pole through hole 11 is provided, the distance c between the top surface 321 of the connecting rib 32 away from the shell member 10 and the shell member 10 is less than or equal to the distance d between the end surface 3121 of the flange 31 away from the shell member 10 and the shell member 10, thereby preventing excessive material from being present at the connection between the connecting rib 32 and the flange 31 after rolling, resulting in an excessive height. When the batteries are grouped, the connecting rib 32 affects the welding between the pole 20 and the bus bar.

[0055] Combination Figure 5 and Figure 6 As shown, the distance between the top surface 321 of the connecting rib 32 away from the shell part 10 and the shell part 10 can be expressed as c, and the distance between the end surface 3121 of the flange 31 away from the shell part 10 and the shell part 10 can be expressed as d. c is less than or equal to d, which can also facilitate the forming of the connecting rib 32 and the flange 31.

[0056] The direction perpendicular to the outer surface 12 of the housing 10 provided with the pole through hole 11 may be parallel to the direction Z in which the connecting rib 32 extends from the housing 10 .

[0057] In one embodiment, Figure 1 As shown, there are two connecting ribs 32 and two flanges 31. Along the length direction of the outer surface 12 of the shell member 10 where the pole through hole 11 is provided, the two flanges 31 are arranged opposite to each other, and the two flanges 31 are connected by two connecting ribs 32, so that the fixing part 30 forms a circumferential closed structure around the same pole through hole 11, which can not only ensure the structural strength of the fixing part 30, and thus ensure that the fixing part 30 forms a reliable fixation to the pole 20, but also enable the pole 20 to have a relatively large connection area, and then when the batteries are grouped, the welding area between the pole 20 and the bus bar is increased, thereby increasing the current capacity.

[0058] Combination Figure 1 As shown, the length direction of the outer surface 12 can be represented as X, and the width direction of the outer surface 12 can be represented as Y. Figure 5 and Figure 6 As shown, the direction in which the flange 31 extends from the shell member 10 and the direction in which the connecting rib 32 extends from the shell member 10 can be represented as Z.

[0059] Combination Figure 1 As shown, the two flanges 31 are arranged at intervals along the length direction of the outer surface 12 , and the two connecting ribs 32 are arranged at intervals along the width direction of the outer surface 12 .

[0060] In one embodiment, the direction in which the connecting rib 32 extends from one end connected to one flange 31 to the other end connected to the other flange 31 is parallel to the length direction of the outer surface 12; wherein, along the length direction of the outer surface 12, the length of the connecting rib 32 is e, the length of the outer surface 12 is f, and e / f is 0.05-0.2, thereby ensuring that the pole 20 around which the fixing portion 30 is arranged can have a relatively large setting space, thereby allowing the pole 20 to have a relatively large size, thereby improving the current carrying capacity of the pole 20, and facilitating the welding between the pole 20 and the busbar when the batteries are subsequently grouped, thereby reliably improving the grouping capacity and current carrying capacity of the battery.

[0061] Combination Figure 1As shown, the direction in which the connecting rib 32 extends from one end connected to one flange 31 to the other end connected to the other flange 31 can be considered as the length extension direction of the connecting rib 32, so it can be considered that the length extension direction of the connecting rib 32 is parallel to the length direction of the outer surface 12. Along the length direction of the outer surface 12, the length of the connecting rib 32 can be expressed as e, and the length of the outer surface 12 can be expressed as f.

[0062] The ratio of the length e of the connecting rib 32 to the length f of the outer surface 12 can be 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.11, 0.12, 0.13, 0.14, 0.15, 0.16, 0.17, 0.18, 0.19 or 0.2, etc.

[0063] For example, the length f of the outer surface 12 can be 290 mm, 300 mm, 302 mm, 303 mm, 305 mm, 306 mm, 308 mm, 310 mm, 320 mm, etc., which is not limited here.

[0064] The ratio of the length e of the connecting rib 32 to the length f of the outer surface 12 is too small, and the length e of the connecting rib 32 is relatively small, which is not only not conducive to improving the fixing ability of the pole 20, but also will make the size of the pole 20 relatively small, which is not conducive to ensuring the current carrying capacity of the pole 20; and the ratio of the length e of the connecting rib 32 to the length f of the outer surface 12 is too large, the size of the shell part 10 occupied by the connecting rib 32 is too large, which is not conducive to the setting of other structures, and will cause the size of the pole 20 to be too large, which is not conducive to improving the overall energy density of the battery.

[0065] It should be noted that when the area where the connecting rib 32 is connected to the shell member 10 is a straight line away from the outer edge of the pole through hole 11 and the extension direction of the straight line is parallel to the length direction of the outer surface 12, b can be equal to e.

[0066] In one embodiment, Figure 2 and Figure 3As shown, the flange 31 includes a first part 33 and at least one second part 34, and the first part 33 is connected to the connecting rib 32 through the second part 34; wherein, the outer edge of the area where the first part 33 is connected to the shell member 10 away from the pole through hole 11 is a first arc, and the extension trajectory of the outer edge of the area where the first part 33 is connected to the shell member 10 away from the pole through hole 11 is inconsistent with the extension trajectory of the outer edge of the area where the second part 34 is connected to the shell member 10 away from the pole through hole 11, which can release the stress between the flange 31 and the connecting rib 32, thereby reducing the stress between the flange 31 and the connecting rib 32, preventing the flange 31 from cracking during rolling, and further improving the overall structural strength of the fixing portion 30, thereby achieving reliable fixation of the pole 20, and avoiding excessive stress concentration to damage the shell member 10, thereby improving the safe use performance of the battery.

[0067] The second part 34 is connected between the first part 33 and the connecting rib 32. The second part 34 can form stress absorption during the forming process of the flange 31, thereby reducing the risk of cracking of the flange 31. The extension trajectory of the area where the first part 33 is connected to the shell part 10 away from the outer edge of the pole through hole 11 is inconsistent with the extension trajectory of the area where the second part 34 is connected to the shell part 10 away from the outer edge of the pole through hole 11, which can more conveniently form stress release between the two, thereby reliably improving the structural stability of the flange 31.

[0068] The extension trajectory of the area where the first portion 33 is connected to the shell member 10 away from the outer edge of the pole through hole 11 is inconsistent with the extension trajectory of the area where the second portion 34 is connected to the shell member 10 away from the outer edge of the pole through hole 11. For example, the extension trajectory of the area where the first portion 33 is connected to the shell member 10 away from the outer edge of the pole through hole 11 can be a first circumferential direction, and the extension trajectory of the area where the second portion 34 is connected to the shell member 10 away from the outer edge of the pole through hole 11 can also be a second circumferential direction, but the first circumference and the second circumference are not the same circle; or, the extension trajectory of the area where the first portion 33 is connected to the shell member 10 away from the outer edge of the pole through hole 11 can be a circumferential direction, and the extension trajectory of the area where the second portion 34 is connected to the shell member 10 away from the outer edge of the pole through hole 11 can also be a straight line direction, etc.

[0069] The outer edge of the area where the first portion 33 is connected to the housing 10 and is away from the pole through hole 11 is a first arc line, and the extension track of the outer edge of the second portion 34 away from the pole through hole 11 may include an arc and a straight line, or the extension track of the second portion 34 away from the outer edge of the pole through hole 11 may be an arc, etc. The second portion 34 is a transition structure between the first portion 33 and the connecting rib 32.

[0070] The flange 31 is bent into a fixed section 311 and a pressing section 312. The fixed section 311 is fixed to the housing 10, and the pressing section 312 is pressed onto the pole 20. The first portion 33 and the second portion 34 form the fixed section 311, and the first portion 33 can form at least part of the pressing section 312.

[0071] A portion of the second portion 34 may be pressed against the pole 20, that is, a portion of the second portion 34 may include a vertical portion (part of the fixing section 311) and a folded portion (part of the pressing section 312), the folded portion may be pressed against the pole 20, and another portion of the second portion 34 may include only the vertical portion; or, the entire second portion 34 may include both the vertical portion and the folded portion; or, the entire second portion 34 may be the vertical portion.

[0072] In one embodiment, the outer edge of the area where the second portion 34 is connected to the shell member 10 and is away from the pole through hole 11 is a second arc, and the curvature of the first arc is inconsistent with the curvature of the second arc; wherein 0.5≤a / b≤2, that is, the outer edge of the area where the flange 31 is connected to the shell member 10 and is away from the pole through hole 11 is an arc as a whole, and the extension length a of the arc can be relatively large, thereby making the flange 31 smoother as a whole, and can also be more conducive to improving the release of stress, thereby reducing the probability of damage to the flange 31.

[0073] Combination Figure 2 As shown, the outer edge of the area where the first portion 33 is connected to the shell member 10 and away from the pole through hole 11 is a first arc, and the outer edge of the area where the second portion 34 is connected to the shell member 10 and away from the pole through hole 11 is a second arc. At this time, the outer edge of the area where the flange 31 is connected to the shell member 10 and away from the pole through hole 11 is an arc as a whole, and the length of the arc is represented by a. When measuring, the length is the overall extension length of the flange 31 between two adjacent connecting ribs 32.

[0074] In one embodiment, the outer edge of the area where the second portion 34 is connected to the shell member 10 and is away from the pole through hole 11 is a straight line, 0.3≤a / b≤1.5, that is, the outer edge of the area where the flange 31 is connected to the shell member 10 and is away from the pole through hole 11 is an arc, and the length of the first arc is a. On the basis of being able to release stress, the space occupancy rate can also be appropriately reduced.

[0075] Combination Figure 3As shown, the outer edge of the area where the first portion 33 is connected to the shell member 10 and away from the pole through hole 11 is a first arc, and the outer edge of the area where the second portion 34 is connected to the shell member 10 and away from the pole through hole 11 is a straight line. At this time, the outer edge of the area where the flange 31 is connected to the shell member 10 and away from the pole through hole 11 is an arc, and the length of the arc is represented by a. When measured, the length is the overall extension length of the first portion 33 between two adjacent second portions 34.

[0076] In one embodiment, the extension length of the area where the first portion 33 is connected to the shell member 10 away from the outer edge of the pole through hole 11 is greater than the extension length of the area where the second portion 34 is connected to the shell member 10 away from the outer edge of the pole through hole 11, that is, the second portion 34 can have a relatively small size, thereby avoiding the second portion 34 occupying a large space and affecting the fixing ability of the fixing portion 30 to the pole 20, thereby reducing the risk of the pole 20 detaching from the shell member 10.

[0077] In one embodiment, the second part 34 extends from one end connected to the first part 33 to the other end connected to the connecting rib 32, and the height of the second part 34 extending from the shell member 10 gradually decreases, which not only ensures that the second part 34 can smoothly transition from the first part 33 to the connecting rib 32, but also enables the second part 34 to match the height difference between the first part 33 and the connecting rib 32, thereby reducing the probability of sharp corners in the second part 34, thereby avoiding the second part 34 from damaging other structures, thereby improving the safety performance of the battery shell assembly.

[0078] The minimum height of the second portion 34 extending from the shell member 10 is greater than the maximum height of the connecting rib 32 extending from the shell member 10, and the height of the second portion 34 extending from the shell member 10 gradually changes. For example, the height of one end of the second portion 34 connected to the first portion 33 can be consistent with the height of the first portion 33 extending from the shell member 10, and the height of the other end of the second portion 34 connected to the connecting rib 32 can be consistent with the height of the connecting rib 32 extending from the shell member 10, so that the height of the second portion 34 can be gradually reduced and smoothly transitioned, that is, the opposite ends of the second portion 34 can be divided by the first portion 33 and the connecting rib 32 respectively.

[0079] The height of the second portion 34 extending from the shell 10 is obtained in the same manner as the height of the flange 31 extending from the shell 10 , and will not be described in detail herein.

[0080] The direction in which the second portion 34 extends from the housing 10 can also be represented as Z.

[0081] In one embodiment, Figure 1As shown, a liquid injection hole 13 is provided on the shell member 10, and the liquid injection hole 13 and the pole through hole 11 are located on the same surface of the shell member 10. The height of the connecting rib 32 extending from the shell member 10 is ≥0.2mm. On the basis of improving the space utilization rate of the shell member 10, the connecting rib 32 can form an external protection for the pole 20. When the electrolyte is injected through the liquid injection hole 13, even if the electrolyte overflows, the connecting rib 32 can also form a barrier to the electrolyte, thereby preventing the electrolyte from contacting the pole 20 and the insulating member 40, thereby reducing the risk of corrosion of the insulating member 40, thereby improving the insulation protection capability of the insulating member 40.

[0082] Combination Figure 6 As shown, the height of the connecting rib 32 extending from the shell member 10 can be expressed as c, that is, the height of the connecting rib 32 extending from the shell member 10 can be equal to the distance c between the top surface 321 of the connecting rib 32 on the side away from the shell member 10 and the shell member 10 in the direction perpendicular to the outer surface 12 of the shell member 10 provided with the pole through hole 11. If the height c of the connecting rib 32 extending from the shell member 10 is too large, it may affect the welding between the pole 20 and the busbar, while if the height c of the connecting rib 32 extending from the shell member 10 is too small, it is not conducive to forming a reinforced protection for the flange 31, and the blocking ability for the electrolyte will also be relatively low.

[0083] The height of the connecting rib 32 extending from the shell 10 is ≥ 0.2 mm, and the height of the connecting rib 32 extending from the shell 10 is not greater than the height between the top of the pole 20 and the outer surface 12 of the shell 10, that is, the connecting rib 32 is not set beyond the pole 20. The height of the connecting rib 32 extending from the shell 10 can be 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.8 mm, 1 mm, 1.5 mm or 2 mm, etc.

[0084] In one embodiment, Figures 4 to 6 As shown, the battery shell assembly also includes an insulating member 40, at least part of which is arranged between the pole 20 and the shell member 10. In the direction in which the connecting rib 32 extends from the shell member 10, the top end 41 of the insulating member 40 away from the side of the shell member 10 is arranged beyond the top surface 321 of the connecting rib 32 away from the side of the shell member 10. This can not only ensure that the insulating member 40 has reliable insulation ability and avoid the risk of short circuit between the pole 20 and the shell member 10, but also enable the pole 20 to have better fixing ability and reduce the risk of torsion, thereby improving the safety performance of the battery.

[0085] The insulating member 40 may be an integral structure, for example, the insulating member 40 may be an integrally molded plastic structure; or, the insulating member 40 may include at least two parts, and the insulating member 40 may include an insulating part and a sealing ring.

[0086] The pressing section 312 is pressed onto the pole 20 so that at least a portion of the pole 20 is clamped between the pressing section 312 and the shell 10 . The pressing section 312 can be pressed onto the pole 20 through the insulating member 40 , that is, the insulating member 40 can be located between the pressing section 312 and the pole 20 .

[0087] It should be noted that the battery housing assembly may include two poles 20 , which may be a positive pole and a negative pole respectively, and the number of the fixing portion 30 may be one or two.

[0088] An embodiment of the present invention further provides a battery, comprising the above-mentioned battery housing assembly and a battery cell 50 , wherein the battery cell 50 is electrically connected to the pole 20 .

[0089] The battery shell assembly of a battery in one embodiment of the utility model includes a shell member 10, a pole 20 and a fixing portion 30. The pole 20 is inserted into the pole through hole 11 of the shell member 10. The fixing portion 30 is fixed to the shell member 10. The fixing portion 30 and at least part of the shell member 10 are an integrally formed structure, and are bent into a fixing section 311 and a pressing section 312, so as to achieve reliable fixation of the pole 20. The fixing portion 30 includes at least two flanges 31 and at least two connecting ribs 32. Adjacent flanges 31 are arranged at intervals and connected by connecting ribs 32. The minimum height of the flange 31 extending from the shell member 10 is greater than the maximum height of the connecting rib 32 extending from the shell member 10. This not only facilitates the flange 31 to effectively fix the pole 20, but also facilitates the formation of the flange 31, preventing damage and cracking at the edge corners of the flange 31. The connecting rib 32 can also strengthen the shell member 10, and the flange 31 is connected to the shell member 10. The outer edge of the connection area away from the pole through hole 11 includes an arc, the extension length of the arc is a, and the extension length of the outer edge of the connection area between the connecting rib 32 and the shell member 10 away from the pole through hole 11 is b, 0.3≤a / b≤2, thereby improving the fixing stability of the flange 31 to the pole 20, and avoiding the situation where the flange 31 is too long and causes excessive stress concentration during the forming process, thereby reducing the probability of damage to the flange 31, thereby ensuring that the flange 31 can form a reliable fixation to the pole 20, thereby improving the safe use performance of the battery.

[0090] It should be noted that the shell member 10 may be a cover plate, and the battery further includes a side wall connected to the cover plate and a bottom wall opposite to the cover plate, and the side wall and the bottom wall may be an integral structure, or the side wall and the bottom wall may be a split structure.

[0091] The shell 10 may include a bottom wall arranged opposite to the cover plate and a side wall connected to the bottom wall. The bottom wall may be provided with a pole through hole 11. The battery further includes a cover plate connected to the side wall.

[0092] The battery includes a cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charge / discharge. A cell refers to a unit formed by winding or laminating a stacked portion, which includes a first pole sheet, a separator, and a second pole sheet. When the first pole sheet is a positive pole sheet, the second pole sheet is a negative pole sheet. The polarities of the first pole sheet and the second pole sheet can be interchanged. The first pole sheet and the second pole sheet are coated with an active material. The cell can be electrically connected to the pole 20, the cell 50 can be connected to the pole 20 through a transition piece, or the cell 50 can be directly connected to the pole 20.

[0093] Combination Figure 7 As shown, the battery cell 50 is electrically connected to the pole 20, and can then be charged and discharged through the pole 20. For example, when the batteries are grouped, multiple batteries can form an electrical connection between multiple poles 20 through a busbar.

[0094] In one embodiment, the battery may be a quadrangular prism battery. A quadrangular prism battery mainly refers to a battery having a prism shape, but it is not strictly limited whether each side of the prism must be a straight line in the strict sense, and the corners between the sides are not necessarily right angles, and can be arc transitions.

[0095] The battery can be a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. Specifically, the battery cell is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.

[0096] Alternatively, the battery may be a wound battery, that is, a first pole sheet, a second pole sheet with electrical properties opposite to the first pole sheet, and a diaphragm sheet arranged between the first pole sheet and the second pole sheet are wound to obtain a wound battery cell.

[0097] In one embodiment, the battery may be a cylindrical battery, or the battery may be a hexagonal prism battery. The battery may be a wound battery, that is, a first pole piece, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece are wound to obtain a wound battery cell.

[0098] An embodiment of the utility model further provides a battery pack, comprising the above-mentioned battery.

[0099] The battery shell assembly of a battery pack of one embodiment of the utility model includes a shell member 10, a pole 20 and a fixing portion 30. The pole 20 is inserted into the pole through hole 11 of the shell member 10. The fixing portion 30 is fixed to the shell member 10. The fixing portion 30 and at least part of the shell member 10 are an integrally formed structure, and are bent into a fixing section 311 and a pressing section 312, so as to achieve reliable fixation of the pole 20. The fixing portion 30 includes at least two flanges 31 and at least two connecting ribs 32. Adjacent flanges 31 are arranged at intervals and connected by the connecting ribs 32. The minimum height of the flange 31 extending from the shell member 10 is greater than the maximum height of the connecting rib 32 extending from the shell member 10. This not only facilitates the flange 31 to effectively fix the pole 20, but also facilitates the formation of the flange 31, preventing damage and cracking at the edge corners of the flange 31. The connecting rib 32 can also strengthen the shell member 10, and the flange 31 is connected to the shell member 10. The outer edge of the connection area away from the pole through hole 11 includes an arc, the extension length of the arc is a, and the extension length of the outer edge of the connection area between the connecting rib 32 and the shell member 10 away from the pole through hole 11 is b, 0.3≤a / b≤2, thereby improving the fixing stability of the flange 31 to the pole 20, and avoiding the situation where the flange 31 is too long and causes excessive stress concentration during the forming process, thereby reducing the probability of damage to the flange 31, thereby ensuring that the flange 31 can form a reliable fixation to the pole 20, thereby improving the safe use performance of the battery pack.

[0100] In one embodiment, the battery pack is a battery module or a battery pack.

[0101] The battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate, and the end plate and the side plate are used to fix the plurality of batteries.

[0102] It should be noted that multiple batteries can be arranged in a battery box after forming a battery module, and multiple batteries can be fixed by end plates and side plates. Multiple batteries can be directly arranged in the battery box, that is, there is no need to group multiple batteries, in which case the end plates and side plates can be removed.

[0103] Those skilled in the art will readily come up with other embodiments of the present disclosure after considering the specification and practicing the utility model disclosed herein. The present disclosure is intended to cover any variation, use or adaptation of the present utility model, which follows the general principles of the present disclosure and includes common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and example embodiments are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

[0104] It should be understood that the present disclosure is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from its scope. The scope of protection of the present disclosure is limited only by the appended claims.

Claims

1. A battery housing assembly, characterized in that: include: A housing member (10), wherein a pole through hole (11) is provided on the housing member (10); A pole (20), at least a portion of which is inserted into the pole through hole (11); A fixing portion (30), the fixing portion (30) being fixed to the shell member (10) and arranged around the same pole through hole (11), the fixing portion (30) and at least part of the shell member (10) being an integrally formed structure, the fixing portion (30) comprising at least two flanges (31) and at least two connecting ribs (32), adjacent flanges (31) being arranged at intervals and connected by the connecting ribs (32), the minimum height of the flange (31) extending from the shell member (10) being greater than the minimum height of the connecting rib (32) extending from the shell member (10) The maximum height of the shell member (10) extending outward, the flange (31) fixes the pole (20), the fixing portion (30) protrudes from the outer surface (12) of the shell member (10) and extends outward, the flange (31) is bent into a fixing section (311) and a pressing section (312), the fixing section (311) is fixed to the shell member (10), and the pressing section (312) is pressed on the pole (20), so that at least a part of the pole (20) is clamped between the pressing section (312) and the shell member (10); The region where the flange (31) is connected to the shell member (10) and is away from the outer edge of the pole through hole (11) comprises an arc line, the extension length of the arc line is a, the extension length of the region where the connecting rib (32) is connected to the shell member (10) and is away from the outer edge of the pole through hole (11) is b, and 0.3≤a / b≤2.

2. The battery housing assembly according to claim 1, characterized in that: The shell member (10) is a cover plate, and / or the area where the connecting rib (32) is connected to the shell member (10) and is away from the outer edge of the pole through hole (11) is a straight line.

3. The battery housing assembly according to claim 1, characterized in that: The angle between the direction in which the fixing section (311) extends from one end connected to the shell member (10) to the other end of the fixing section (311) away from the shell member (10) and the outer surface (12) of the shell member (10) provided with the pole through hole (11) is 30°-150°; and / or the angle between the fixing section (311) and the pressing section (312) is 40°-140°; and / or the angle between the direction in which the connecting rib (32) extends from one end connected to the shell member (10) to the other end of the connecting rib (32) away from the shell member (10) and the outer surface (12) of the shell member (10) provided with the pole through hole (11) is 30°-150°.

4. The battery housing assembly according to claim 3, characterized in that: The end surface (3121) of the pressing section (312) away from the shell member (10) is parallel to the outer surface (12), and the direction in which the connecting rib (32) extends from one end connected to the shell member (10) to the other end of the connecting rib (32) away from the shell member (10) is parallel to the direction in which the fixing section (311) extends from one end connected to the shell member (10) to the other end of the fixing section (311) away from the shell member (10).

5. The battery housing assembly according to any one of claims 1 to 4, characterized in that: Along a direction perpendicular to the outer surface (12) of the shell member (10) on which the pole through hole (11) is provided, a distance c between a top surface (321) of the connecting rib (32) on a side away from the shell member (10) and the shell member (10) is less than or equal to a distance d between an end surface (3121) of the flange (31) on a side away from the shell member (10) and the shell member (10).

6. The battery housing assembly according to any one of claims 1 to 4, characterized in that: The direction in which the connecting rib (32) extends from one end connected to one flange (31) to the other end connected to the other flange (31) is parallel to the length direction of the outer surface (12); Wherein, along the length direction of the outer surface (12), the length of the connecting rib (32) is e, the length of the outer surface (12) is f, and e / f is 0.05-0.

2.

7. The battery housing assembly according to any one of claims 1 to 4, characterized in that: The flange (31) comprises a first portion (33) and at least one second portion (34), and the first portion (33) is connected to the connecting rib (32) via the second portion (34); The outer edge of the pole through hole (11) away from the area where the first part (33) is connected to the shell (10) is a first arc, and the extension trajectory of the area where the first part (33) is connected to the shell (10) away from the outer edge of the pole through hole (11) is inconsistent with the extension trajectory of the area where the second part (34) is connected to the shell (10) away from the outer edge of the pole through hole (11).

8. The battery housing assembly according to claim 7, characterized in that: An outer edge of a region where the second portion (34) is connected to the housing (10) and faces away from the pole through hole (11) is a second arc, and the curvature of the first arc is inconsistent with the curvature of the second arc; Among them, 0.5≤a / b≤2.

9. The battery housing assembly according to claim 7, characterized in that: The outer edge of the area where the second portion (34) is connected to the housing (10) and is away from the pole through hole (11) is a straight line, and 0.3≤a / b≤1.

5.

10. The battery housing assembly according to claim 7, characterized in that: The extension length of the area where the first part (33) is connected to the housing member (10) and is away from the outer edge of the pole through hole (11) is greater than the extension length of the area where the second part (34) is connected to the housing member (10) and is away from the outer edge of the pole through hole (11).

11. The battery housing assembly according to claim 7, characterized in that: The second part (34) extends from one end connected to the first part (33) to the other end connected to the connecting rib (32), and the height of the second part (34) extending from the shell (10) gradually decreases.

12. The battery housing assembly according to any one of claims 1 to 4, characterized in that: The shell member (10) is provided with a liquid injection hole (13), the liquid injection hole (13) and the pole through hole (11) are located on the same surface of the shell member (10), and the height of the connecting rib (32) extending from the shell member (10) is ≥0.2 mm.

13. The battery housing assembly according to any one of claims 1 to 4, characterized in that: The battery housing assembly further comprises an insulating member (40), at least a portion of which is arranged between the pole (20) and the housing member (10), and in a direction in which the connecting rib (32) extends from the housing member (10), a top end (41) of the insulating member (40) away from the housing member (10) is arranged beyond a top surface (321) of the connecting rib (32) away from the housing member (10).

14. A battery, characterized in that: It comprises a battery housing assembly and a battery cell (50) as claimed in any one of claims 1 to 13, wherein the battery cell (50) is electrically connected to the pole (20).

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