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 battery shell and a pole structure, the pole structure is arranged on the battery shell, the pole structure comprises a main body, a groove is formed in the main body, the groove is provided with an open end face, the area of the open end face is S1, the area of a connecting end face, deviating from the groove, of the main body is S2, the depth of the groove is h1, the distance between the bottom wall of the groove and the connecting end face is h2, 0.02 < = (S1 * h1) / (S2 * h2) < = 30, therefore, the manufacturing cost of the main body can be effectively controlled, the main body can have certain structural strength, the overall overcurrent capability can be ensured, the risk of deformation of the battery shell caused by overhigh strength cannot be increased, and the use performance of the pole structure is reliably 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 structure, which can be used to make electrical connections with the battery cell, thereby being used as an electrode lead-out terminal to facilitate the charging and discharging of the battery. However, due to the structural limitations of the pole structure, the manufacturing cost of the pole structure is relatively high, which is not conducive to reducing the overall manufacturing cost of the battery. 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 the first aspect of the utility model, a battery shell assembly is provided, including a battery shell and a pole structure, the pole structure is arranged on the battery shell, the pole structure includes a main body, the main body is formed with a groove, the groove has an open end face, the area of ​​the open end face is S1, the area of ​​the connecting end face of the main body away from the groove is S2, the depth of the groove is h1, the distance between the bottom wall of the groove and the connecting end face is h2, 0.02≤(S1×h1) / (S2×h2)≤30.

[0005] A battery shell assembly according to an embodiment of the utility model includes a battery shell and a pole structure arranged on the battery shell, wherein the pole structure includes a main body, and a groove is formed on the main body, thereby reducing the overall production cost of the pole structure, and the area of ​​the opening end face of the groove is S1, the area of ​​the connecting end face of the main body away from the groove is S2, the depth of the groove is h1, and the distance between the bottom wall of the groove and the connecting end face is h2. By making (S1×h1) / (S2×h2) 0.02-30, not only the manufacturing cost of the main body can be effectively controlled, but also the main body can have a certain structural strength, which can ensure the overall current flow capacity without increasing the risk of deformation of the battery shell due to excessive strength, thereby reliably improving the performance of the pole structure.

[0006] According to a second aspect of the utility model, a battery is provided, comprising the above-mentioned battery housing assembly, the battery further comprising a battery cell, the battery cell being arranged in the battery housing, and the pole structure being electrically connected to the battery cell.

[0007] The battery of the utility model embodiment includes a battery housing assembly and a battery cell, the battery cell is arranged in the battery housing, the pole structure is electrically connected to the battery cell, the pole structure is arranged on the battery housing, the pole structure includes the pole structure and the battery housing, the pole structure is arranged on the battery housing, the pole structure includes a main body, the main body is formed with a groove, thereby reducing the overall production cost of the pole structure, and the area of ​​the opening end face of the groove is S1, the area of ​​the connection end face of the main body away from the groove is S2, the depth of the groove is h1, and the bottom wall of the groove is connected to the connection end face. The distance between the end faces is h2, (S1×h1) / (S2×h2) is too small, the area S2 of the connection end face is too large, or the distance h2 between the bottom wall 112 of the groove and the connection end face is too large, the pole structure is difficult to electrically connect with other structures, the pole structure is easy to damage the battery shell, the pole ear or the adapter and other structures, and the pole structure occupies a large space inside the battery; (S1×h1) / (S2×h2) is too large, the area S2 of the connection end face is narrow, the pole structure of the battery is seriously heated, and the strength of the pole structure itself is weak. By making (S1×h1) / (S2×h2) 0.02-30, not only can the manufacturing cost of the main body be effectively controlled, but also the main body can have a certain structural strength, which can ensure the overall current capacity without increasing the risk of deformation of the battery shell due to excessive strength, thereby reliably improving the safe use performance of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 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:

[0009] Figure 1 is a cross-sectional schematic diagram showing a pole structure according to an exemplary embodiment;

[0010] Figure 2 is a structural schematic diagram showing a pole structure from one perspective according to an exemplary embodiment;

[0011] Figure 3 is a structural schematic diagram showing a pole structure from another perspective according to an exemplary embodiment;

[0012] Figure 4 is a cross-sectional schematic diagram showing a pole structure according to another exemplary embodiment;

[0013] Figure 5 is a partial cross-sectional schematic diagram of a battery according to a first exemplary embodiment;

[0014] Figure 6 is a partial cross-sectional schematic diagram of a battery according to a second exemplary embodiment;

[0015] Figure 7 is a partial cross-sectional schematic diagram of a battery according to a third exemplary embodiment;

[0016] Figure 8 is a schematic diagram of a partial exploded structure of a battery according to an exemplary embodiment;

[0017] Fig. 9 is a schematic diagram of a partial cell structure of a battery according to an exemplary embodiment;

[0018] Fig.10 is a schematic structural diagram of a battery according to an exemplary embodiment.

[0019] The following are the descriptions of the reference numerals:

[0020] 10. Main body; 11. Groove; 111. Open end surface; 112. Bottom wall; 113. First section; 114. Second section; 12. Connecting end surface; 15. Clamping section; 20. Shielding member; 30. Battery housing; 31. Post through hole; 32. Fixing portion; 321. Connecting section; 322. Pressing section; 40. Battery cell; 41. Post ear portion; 42. Protruding portion. DETAILED DESCRIPTION

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] An embodiment of the present invention provides a battery housing assembly, please refer to Figures 1 to 10 The battery housing assembly includes a battery housing 30 and a pole structure, the pole structure is arranged on the battery housing 30, the pole structure includes a main body 10, the main body 10 is formed with a groove 11, the groove 11 has an open end face 111, the area of ​​the open end face 111 is S1, the area of ​​the connecting end face 12 of the main body 10 away from the groove 11 is S2, the depth of the groove 11 is h1, the distance between the bottom wall 112 of the groove 11 and the connecting end face 12 is h2, 0.02≤(S1×h1) / (S2×h2)≤30.

[0026] A battery housing assembly according to an embodiment of the utility model includes a battery housing 30 and a pole structure arranged on the battery housing 30, wherein the pole structure includes a main body 10, and the main body 10 is formed with a groove 11, thereby reducing the overall production cost of the pole structure, and the area of ​​an opening end face 111 of the groove 11 is S1, the area of ​​a connecting end face 12 of the main body 10 away from the groove 11 is S2, the depth of the groove 11 is h1, and the distance between the bottom wall 112 of the groove 11 and the connecting end face 12 is h2. By making (S1×h1) / (S2×h2) 0.02-30, not only the manufacturing cost of the main body 10 can be effectively controlled, but also the main body 10 can have a certain structural strength, which can ensure the overall current flow capacity without increasing the risk of deformation of the battery housing 30 due to excessive strength, thereby reliably improving the performance of the battery housing assembly.

[0027] It should be noted that the battery housing assembly includes a battery housing 30 and a pole structure disposed on the battery housing 30. The battery housing 30 may include a first housing member and a second housing member, and the pole structure may be disposed in the first housing member or the second housing member. The first housing member and the second housing member may be split structures, for example, the first housing member may be a cover plate, and the second housing member may be a structure having a cavity, that is, the second housing member includes a side wall and a bottom wall opposite to the cover plate; or the first housing member and the second housing member may be an integrally formed structure.

[0028] Combination Figure 1 As shown, the main body 10 is formed with a groove 11, and the groove 11 has an open end surface 111, that is, the bottom wall 112 of the groove 11 is arranged opposite to the open end surface 111. Due to the existence of the groove 11, the pole structure can realize the improvement of the overall height, reduce the initial thickness of the pole structure plate, and thus reduce the overall production cost of the pole structure, ensure the electrical connection assembly efficiency of the pole structure and the internal and external structures of the battery, and avoid the pole structure size is too large, the pole structure strength is too large, resulting in the risk of increased deformation of the battery shell and other structures. The pole structure can be connected to the bus when the battery is grouped, and the pole structure can be electrically connected to the pole ear of the battery cell through the adapter.

[0029] Combination Figures 1 to 3 As shown, the area of ​​the opening end face 111 is represented as S1, the area of ​​the connecting end face 12 of the main body 10 away from the groove 11 is represented as S2, the depth of the groove 11 is represented as h1, and the distance between the bottom wall 112 of the groove 11 and the connecting end face 12 is represented as h2. If (S1×h1) / (S2×h2) is too small, the area S2 of the connecting end face 12 is too large, or the distance h2 between the bottom wall 112 of the groove 11 and the connecting end face 12 is too large, it is difficult to electrically connect the pole structure with other structures, the pole structure is easy to damage the battery shell, the pole ear or the adapter, and the pole structure occupies a large space inside the battery; if (S1×h1) / (S2×h2) is too large, the area S2 of the connecting end face 12 is narrow, the pole structure of the battery is seriously heated, and the pole structure itself is weak. By making (S1×h1) / (S2×h2) 0.02-30, the structural strength of the pole structure can be effectively guaranteed, and the damage to other structures can also be reduced. Further, combined with Figure 6 and Figure 7 The connection end surface 12 of the main body 10 facing away from the groove 11 is the bottom surface of the main body 10 facing the battery core 40, and the connection end surface 12 of the main body 10 is represented by S2.

[0030] (S1×h1) / (S2×h2) can be 0.02, 0.03, 0.04, 0.05, 0.06, 0.08, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1, 1.2, 1.4, 1.5, 1.8, 2, 2.2, 2.4, 2.5, 2.8, 3, 3.2, 3.4, 3.5, 3.8 ,4,4.2,4.4,4.5,4.8,5,5.2,5.4,5.5,5.6,5.8,6,6.2,6.4,6.5,6.6,6.8,7,7.2,7.4,7.5,7.6,7.8,8,8.2,8.4,8.5,8.6,8.8,9,9.2,9.4,9.5,9.6,9.8,1 0, 10.2, 10.4, 10.5, 10.6, 10.8, 11, 11.2, 11.4, 11.5, 11.6, 11.8, 12, 12.2, 12.4, 12.5, 12.6, 12.8, 13, 13.2, 13.4, 13.5, 13.6, 13.8, 14, 14.2, 14.5, 14.6, 1 4.8, 15, 15.5, 16, 16.5, 17, 17.5, 18, 18.5, 19, 19.5, 20, 20.5, 21, 21.5, 22, 22.5, 23, 23.5, 24, 24.5, 25, 25.5, 26, 26.5, 27, 27.5, 28, 28.5, 29, 29.5 or 30 and so on.

[0031] In one embodiment, the area of ​​the opening end surface 111 is S1, 20 mm 2 ≤S1≤1960mm 2 , which can not only realize the cost control of the pole structure, but also control the overcurrent capacity of the pole structure, thereby improving the safety performance of the pole structure.

[0032] If the area S1 of the opening end face 111 is too small, the height of the pole structure will be increased by a small amount, which is not conducive to the rapid assembly of the pole structure and other battery structures; if the area S1 of the opening end face 111 is too large, it may cause the distance h2 between the bottom wall 112 of the groove 11 and the connecting end face 12 to be small, and it will be difficult to achieve current flow at the top of the pole structure. At the same time, the stress concentration at the top will cause the risk of structural failure when the pole structure is assembled with the battery casing.

[0033] The area S1 of the opening end surface 111 may be 20 mm 2 , 25mm 2 、28mm 2 , 30mm 2 、32mm 2 , 35mm 2 、38mm 2 , 40mm 2、42mm 2 、45mm 2 、48mm 2 、50mm 2 、52mm 2 、55mm 2 、58mm 2 、60mm 2 、62mm 2 、65mm 2 、68mm 2 、70mm 2 、80mm 2 、90mm 2 、100mm 2 、110mm 2 、120mm 2 、140mm 2 、150mm 2 、160mm 2 、170mm 2 、180mm 2 、190mm 2 、200mm 2 、210mm 2 、220mm 2 、240mm 2 、250mm 2 、260mm 2 、270mm 2 、280mm 2 、290mm 2 、300mm 2 、310mm 2 、320mm 2 、340mm 2 、350mm 2 、360mm 2 、370mm 2 、380mm 2 、390mm 2 、400mm 2 、410mm 2 、420mm 2 、440mm 2 、450mm 2 、460mm 2 、470mm 2 、480mm 2 、490mm 2 、500mm 2 、510mm 2 、520mm 2 、540mm2 、550mm 2 、560mm 2 、570mm 2 、580mm 2 、590mm 2 、600mm 2 、610mm 2 、615mm 2 、520mm 2 、625mm 2 、650mm 2 、680mm 2 、700mm 2 、750mm 2 , 800mm 2 、850mm 2 , 900mm 2 、950mm 2 , 1000mm 2 、1100mm 2 , 1200mm 2 、1300mm 2 、1400mm 2 、1500mm 2 、1600mm 2 、1700mm 2 、1800mm 2 、1900mm 2 or 1960mm 2 etc.

[0034] In one embodiment, the depth of the groove 11 is h1, the distance between the bottom wall 112 of the groove 11 and the connecting end face 12 is h2, and 0.08≤h1 / h2≤6, so that the depth of the groove 11 and the thickness of the bottom structure of the main body 10 can be effectively controlled, thereby effectively improving the structural strength and current carrying capacity of the pole structure.

[0035] The distance h2 between the bottom wall 112 of the groove 11 and the connection end face 12 can be considered as the bottom structural thickness of the groove 11. If the ratio of the depth h1 of the groove 11 to the distance h2 between the bottom wall 112 of the groove 11 and the connection end face 12 is too small, the overall thickness of the pole structure is too large, which affects the electrical connection efficiency and structural stability of the subsequent pole structure and the pole ear of the battery cell, that is, the depth of the groove 11 is small, the overall height of the pole structure is small, and the pole ear needs to be extended more to connect with the pole structure. The pole ear will bend, etc., the risk of the pole ear tearing is increased, the internal space utilization of the battery is reduced, and the production cost of a single pole structure is high; if the depth h1 of the groove 11 to the distance h2 between the bottom wall 112 of the groove 11 and the connection end face 12 is too large, the bottom structural thickness of the groove 11 of the pole structure is small, and the gas production or vibration inside the battery causes the bottom structural strength of the groove 11 to be damaged.

[0036] The ratio of the depth h1 of the groove 11 to the distance h2 between the bottom wall 112 of the groove 11 and the connecting end face 12 can be 0.08, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1, 1.2, 1.4, 1.5, 1.8, 2, 2.2, 2.4, 2.5, 2.8, 3, 3.2, 3.4, 3.5, 3.8, 4, 4.2, 4.4, 4.5, 4.8, 5, 5.2, 5.4, 5.5, 5.6, 5.8 or 6, etc.

[0037] In one embodiment, 0.5mm≤h1≤11mm, that is, the depth h1 of the groove 11 is 0.5mm-11mm, which ensures that the pole structure has a certain height, thereby facilitating the connection between the pole structure and other structures and avoiding the problem of excessive manufacturing cost caused by excessive depth h1 of the groove 11.

[0038] The depth h1 of the groove 11 can be 0.5mm, 0.8mm, 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.2mm, 5.5mm, 5.8mm, 6mm, 6.2mm, 6.5mm, 6.8mm, 7mm, 7.2mm, 7.5mm, 7.8mm, 8mm, 8.2mm, 8.5mm, 8.8mm, 9mm, 9.2mm, 9.5mm, 9.8mm, 10mm, 10.2mm, 10.5mm, 10.8mm or 11mm, etc.

[0039] In one embodiment, 1.5mm≤h2≤8mm, that is, the distance h2 between the bottom wall 112 of the groove 11 and the connecting end face 12 is 1.5mm-8mm, thereby ensuring the structural strength of the bottom structure of the groove 11, reducing the probability of damage to the bottom structure of the groove 11, and avoiding the problem of high cost caused by the bottom structure of the groove 11 being too thick.

[0040] The distance h2 between the bottom wall 112 of the groove 11 and the connecting end face 12 can be 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.2mm, 5.5mm, 5.8mm, 6mm, 6.2mm, 6.5mm, 6.8mm, 7mm, 7.2mm, 7.5mm, 7.8mm or 8mm, etc.

[0041] In one embodiment, the area of ​​the connecting end surface 12 of the main body 10 away from the groove 11 is S2, 18mm 2 ≤S2≤1900mm 2 , that is, the current capacity of the pole structure can be guaranteed, and the internal space utilization of the pole structure can also be controlled, thereby improving the performance of the pole structure.

[0042] The area S2 of the connecting end face 12 of the main body 10 away from the groove 11 is too small, the current flow area at the bottom of the pole structure is narrow, and local heat generation causes thermal runaway of the battery; the area S2 of the connecting end face 12 of the main body 10 away from the groove 11 is too large, the pole structure occupies a large space inside the battery, and is installed on the battery shell close to the edge of the battery shell, and the overall structural stability is easily failed.

[0043] The area S2 of the connecting end surface 12 of the main body 10 away from the groove 11 can be 18mm 2 , 20mm 2 , 30mm 2 、32mm 2 , 35mm 2 、38mm 2 , 40mm 2 、42mm 2 , 45mm 2 、48mm 2 , 50mm 2 、52mm 2 , 55mm 2 、58mm 2 、60mm 2 、62mm 2 、65mm 2 、68mm 2 , 70mm2 、80mm 2 、90mm 2 、100mm 2 、110mm 2 、120mm 2 、140mm 2 、150mm 2 、160mm 2 、170mm 2 、180mm 2 、190mm 2 、200mm 2 、210mm 2 、220mm 2 、240mm 2 、250mm 2 、260mm 2 、270mm 2 、280mm 2 、290mm 2 、300mm 2 、310mm 2 、320mm 2 、340mm 2 、350mm 2 、360mm 2 、370mm 2 、380mm 2 、390mm 2 、400mm 2 、410mm 2 、420mm 2 、440mm 2 、450mm 2 、460mm 2 、470mm 2 、480mm 2 、490mm 2 、500mm 2 、510mm 2 、520mm 2 、540mm 2 、550mm 2 、560mm 2 、570mm 2 、580mm 2 、590mm 2 、600mm 2 、625mm 2 、650mm 2 、680mm 2 、700mm 2、750mm 2 , 800mm 2 、850mm 2 , 900mm 2 、950mm 2 , 1000mm 2 、1100mm 2 、1200mm 2 、1300mm 2 、1400mm 2 、1500mm 2 、1600mm 2 、1700mm 2 、1800mm 2 or 1900mm 2 etc.

[0044] In one embodiment, the area of ​​the opening end face 111 is S1, the area of ​​the connection end face 12 of the main body 10 away from the groove 11 is S2, 0.6≤S1 / S2≤5, thereby achieving the balance of the top structural strength and the bottom structural strength of the main body 10, avoiding large differences in the two end faces of the pole structure, resulting in uneven force inside and outside the battery, causing failure of the electrical connection at one end or structural damage, thereby effectively improving the safe use performance of the pole structure.

[0045] If the ratio of the area S1 of the opening end surface 111 to the area S2 of the connection end surface 12 is too large or too small, the structure of the main body 10 will be unbalanced, which is not only not conducive to controlling the safety performance of the pole structure, but also inconvenient to manufacture the pole structure.

[0046] The ratio of the area S1 of the opening end surface 111 to the area S2 of the connecting end surface 12 can be 0.6, 0.7, 0.8, 0.9, 1, 1.1, 1.2, 1.5, 1.8, 2, 2.1, 2.2, 2.5, 2.8, 3, 3.1, 3.2, 3.5, 3.8, 4, 4.1, 4.2, 4.5, 4.8 or 5, etc.

[0047] In one embodiment, the maximum area enclosed by the circumferential outer surface of the main body 10 is S3, 1.05≤S3 / S1≤4, and / or, 1.1≤S3 / S2≤6, so that the structural strength of the main body 10 can be effectively controlled, so that the main body 10 can have a portion with a larger circumferential area, which is then used for the installation and fixation of the pole structure, releasing the stress during the assembly of the pole structure, and reducing the pressure on the pole structure.

[0048] Combination Figure 1 and Figure 2As shown, the maximum area enclosed by the circumferential outer surface of the main body 10 can be expressed as S3. The maximum area S3 enclosed by the circumferential outer surface of the main body 10 can be considered as the positive projection area of ​​the main body 10 on a plane along a direction perpendicular to the open end surface 111. The maximum area S3 enclosed by the circumferential outer surface of the main body 10 is formed in the middle part of the main body 10. This component can be used to realize the buffer surface of the top and bottom ends of the main body 10, and can also be used for the installation and fixation of the pole structure, release the stress of the pole structure during assembly, and reduce the pressure of the pole structure. If S3 / S1 and S3 / S2 are too large or too small, it will cause the pole structure to occupy a larger space of the entire battery and any end of the pole structure to be stressed, resulting in failure of the other end.

[0049] The ratio of the maximum area S3 enclosed by the circumferential outer surface of the main body 10 to the area S1 of the opening end surface 111 can be 1.05, 1.1, 1.2, 1.4, 1.5, 1.8, 2, 2.2, 2.4, 2.5, 2.8, 3, 3.2, 3.4, 3.5, 3.8 or 4, etc.

[0050] The ratio of the maximum area S3 enclosed by the circumferential outer surface of the main body 10 to the area S2 of the connecting end face 12 can be 1.1, 1.2, 1.4, 1.5, 1.8, 2, 2.2, 2.4, 2.5, 2.8, 3, 3.2, 3.4, 3.5, 3.8, 4, 4.2, 4.4, 4.5, 4.8, 5, 5.2, 5.4, 5.5, 5.6, 5.8 or 6, etc.

[0051] In one embodiment, the groove 11 includes a first section 113 and a second section 114, the first section 113 and the second section 114 are connected, the first section 113 has a bottom wall 112, and the second section 114 has an open end surface 111; wherein the area of ​​the open end surface 111 is greater than the area of ​​the bottom wall 112, and / or the area enclosed by the circumferential outer edge of the bottom end of the second section 114 is greater than the area of ​​the bottom wall 112, thereby allowing the first section 113 and the second section 114 to form a stepped structure, which is not only convenient for molding, but also can avoid the overall area of ​​the groove 11 being too large to affect the structural strength and current-carrying capacity of the pole structure, thereby improving the safe use performance of the pole structure.

[0052] The area of ​​the opening end surface 111 is larger than the area of ​​the bottom wall 112 , thereby controlling the space utilization rate of the bottom end of the pole structure and facilitating the installation of the pole structure.

[0053] The area enclosed by the circumferential outer edge of the bottom end of the second section 114 is larger than the area of ​​the bottom wall 112 , so that the first section 113 and the second section 114 can have different areas, which can effectively control the structural strength of the pole structure and facilitate the setting of the shielding member 20 in the second section 114 .

[0054] In one embodiment, the ratio of the area of ​​the opening end surface 111 to the area of ​​the bottom wall 112 is 1.2-9, which can not only control the overall area difference of the groove 11 to ensure that the pole structure does not have excessive imbalance in structural strength, but also ensure that the formation of the groove 11 can control the manufacturing cost of the pole structure.

[0055] The ratio of the area of ​​the opening end surface 111 to the area of ​​the bottom wall 112 can be 1.2, 1.4, 1.5, 1.8, 2, 2.2, 2.4, 2.5, 2.8, 3, 3.2, 3.4, 3.5, 3.8, 4, 4.2, 4.4, 4.5, 4.8, 5, 5.2, 5.4, 5.5, 5.6, 5.8, 6, 6.2, 6.4, 6.5, 6.8, 7, 7.2, 7.4, 7.5, 7.8, 8, 8.2, 8.4, 8.5, 8.8 or 9, etc.

[0056] In one embodiment, the ratio of the area S4 enclosed by the circumferential outer edge of the bottom end of the second section 114 to the area S5 of the bottom wall 112 is 1.02-4, which can not only avoid the difference between the two areas being too large and the top strength of the pole structure being weak, but also ensure that the top strength and the bottom strength of the pole structure are relatively balanced, ensure that it has a balanced force-bearing capacity, and thereby improve the safe use performance of the pole structure.

[0057] Combination Figure 1 and Figure 2 As shown, the area enclosed by the circumferential outer edge of the bottom end of the second section 114 can be expressed as S4, and the area of ​​the bottom wall 112 can be expressed as S5. The ratio of the area S4 enclosed by the circumferential outer edge of the bottom end of the second section 114 to the area S5 of the bottom wall 112 can be 1.02, 1.05, 1.1, 1.2, 1.4, 1.5, 1.8, 2, 2.2, 2.4, 2.5, 2.8, 3, 3.2, 3.4, 3.5, 3.8 or 4, etc.

[0058] In one embodiment, the distance between the opening end face 111 and the circumferential outermost edge of one end of the main body 10 having the opening end face 111 is m, 0.1mm≤m≤5mm, which can not only ensure the overall strength of the top of the pole structure, but also avoid the overall height of the pole structure being too low, affecting subsequent connection and assembly.

[0059] Combination Figure 1As shown, the distance between the opening end surface 111 and the circumferential outer edge of the end of the main body 10 having the opening end surface 111 is expressed as m. The distance m between the opening end surface 111 and the circumferential outer edge of the end of the main body 10 having the opening end surface 111 can be 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm , 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3mm, 3.1mm, 3.2mm, 3.3mm, 3.4mm, 3.5mm, 3.6mm, 3.7mm, 3.8mm, 3.9mm, 4mm, 4.1mm, 4.2mm, 4.3mm, 4.4mm, 4.5mm, 4.6mm, 4.7mm, 4.8mm, 4.9mm or 5mm, etc.

[0060] In one embodiment, Figure 4 As shown, the pole structure also includes a shielding member 20, which is disposed in the groove 11, S1 / S2 ≥ 0.8, thereby increasing the current capacity of the pole structure, and also facilitating the electrical connection of the battery to the busbar when the battery is grouped. The shielding member 20 can facilitate the subsequent electrical connection of the pole structure with the external battery, increase the overall current flow area, and at the same time, the overall strength of the pole structure and the external electrical connection is guaranteed, so the area S1 of the opening end face 111 can be increased to ensure a larger current flow.

[0061] The shielding member 20 occupies a part of the space of the groove 11 , and the shielding member 20 and the main body 10 may be connected by welding. Alternatively, the shielding member 20 may occupy the entire space of the groove 11 .

[0062] In one embodiment, Figure 5 As shown, a pole through hole 31 is provided on the battery housing 30, at least a portion of the main body 10 is inserted into the pole through hole 31, a fixing portion 32 is provided on the battery housing 30, at least a portion of the fixing portion 32 is arranged around the pole through hole 31, the fixing portion 32 is bent into a connecting section 321 and a pressing section 322, the connecting section 321 is arranged on the battery housing 30, and the pressing section 322 is pressed on the main body 10, so that the main body 10 is clamped between the pressing section 322 and the battery housing 30, thereby effectively preventing the pole structure from detaching from the battery housing 30, and ensuring the safe use performance of the battery.

[0063] A relatively large groove 11 is provided at the top of the pole structure, and the bottom strength of the pole structure is relatively weak. A fixing portion 32 is provided on the battery housing 30 to limit the pole structure, so as to prevent the pole structure from being subjected to stress close to the end face of the battery cell, resulting in failure of the connection seal between the pole structure and the battery housing 30.

[0064] A fixing portion 32 is provided on the battery housing 30, 0.08≤(S1×h1) / (S2×h2). The setting of the fixing portion 32 ensures the overall strength of the pole structure. Therefore, increasing the overall size S1×h1 can improve the production efficiency of the pole structure while ensuring the overall strength of the pole structure, facilitate the subsequent electrical connection of the pole structure with the battery cell, and significantly reduce the overall manufacturing cost of the pole structure.

[0065] It should be noted that the battery housing 30 and the fixing portion 32 are an integrally formed structure, which not only facilitates the molding of the battery housing 30 and the fixing portion 32, but also ensures the connection strength between the battery housing 30 and the fixing portion 32, thereby improving the safe use performance of the battery.

[0066] The battery housing 30 may include a cover plate, and the cover plate and the fixing portion 32 are an integrally formed structure. The cover plate with the fixing portion 32 may be formed by a flat plate through stamping, bending, or the like.

[0067] The fixing portion 32 can be bent into a connecting section 321 and a pressing section 322 . For example, the fixing portion 32 can be effectively fixed to the pole structure by riveting, thereby improving the safety and stability of the pole structure.

[0068] Alternatively, it is not excluded that the cover plate and the fixing portion 32 are separate structures. For example, the cover plate and the fixing portion 32 can be connected by welding.

[0069] In one embodiment, the area of ​​the pole through hole 31 is not less than S2, so that when the pole structure is installed, it can extend from its bottom end into the pole through hole 31 and pass through the interior of the battery shell 30, which not only facilitates the electrical connection with the battery cell, but also can form the positioning of the pole structure through the battery shell 30, thereby improving the installation efficiency of the battery.

[0070] The area of ​​the pole through hole 31 may be greater than S2, or the area of ​​the pole through hole 31 may be equal to S2.

[0071] In one embodiment, the minimum thickness of the fixing portion 32 is 0.3mm-1.5mm, which can not only ensure the structural strength of the fixing portion 32, but also avoid the problem that when the thickness of the fixing portion 32 is too large, the local structural strength of the battery shell 30 is too weak when the battery shell 30 and the fixing portion 32 are formed, which is not conducive to improving the safe use performance of the battery.

[0072] The minimum thickness of the fixing portion 32 may be 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm or 1.5 mm, etc.

[0073] In one embodiment, the width of the pressing section 322 is a, and a / S1 is 0.0006-0.38, thereby effectively controlling the fixing ability of the pressing section 322 on the pole structure, ensuring that the pole structure has a reliable structural size, thereby ensuring the current capacity of the pole structure. The ratio of the width a of the pressing section 322 to the area S1 of the opening end face 111 is too small, the contact area between the pressing section 322 and the pole structure is too small, and the area S1 of the opening end face 111 of the pole structure is large, the overall strength of the pole structure is weak, and the stress of the pressing section 322 is easily concentrated, making it difficult to limit the pole structure; the ratio of the width a of the pressing section 322 to the area S1 of the opening end face 111 is too large, the pressing section 322 occupies the area of ​​the pole structure and the external electrical connection of the battery, the top and external current flow area of ​​the pole structure are small, which affects the overall current transmission rate of the battery, the overall heat generation is large, and there is a risk of short circuit between the pole structure and the battery housing 30.

[0074] Combination Figure 5 As shown, the width of the pressing section 322 can be expressed as a, and the width a of the pressing section 322 can control its pressing ability on the pole structure.

[0075] The ratio of the width a of the pressing section 322 to the area S1 of the opening end surface 111 can be 0.0006, 0.0008, 0.001, 0.0015, 0.0016, 0.0018, 0.002, 0.0025, 0.0028, 0.003, 0.004, 0.005, 0.006, 0.007, 0.008, 0.009, 0.010, 0.011, 0.012, 0.013, 0.014, 0.015, 0.016, 0.018, 0.019, 0.020, 0.021, 0.022, 0.023, 0.024, 0.025, 0.026, 0.027, 0.028, 0.030, 0.031, 0.032, 0.033, 0.034, 0.035, 0.036, 0.037, 0.038, 0.039, 0.040, 0.041, 0.042, 0.043, 0.044, 0.045 01, 0.02, 0.03, 0.04, 0.05, 0.06, 0.07, 0.08, 0.09, 0.1, 0.14, 0.15, 0.16, 0.17, 0.18, 0.2, 0.24, 0.25, 0.26, 0.27, 0.28, 0.3, 0.34, 0.35, 0.36, 0.37 or 0.28, etc.

[0076] In one embodiment, the width a of the pressing section 322 is 1mm-8mm, so that the pressing section 322 can have a sufficient size to limit the pole structure, thereby ensuring the stability of the pole structure, and avoiding the width a of the pressing section 322 being too large, which affects the manufacturing cost of the battery.

[0077] The width a of the pressing section 322 can be 1mm, 1.2mm, 1.5mm, 1.8mm, 2mm, 2.2mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, 3.8mm, 4mm, 4.2mm, 4.5mm, 4.8mm, 5mm, 5.2mm, 5.5mm, 5.8mm, 6mm, 6.2mm, 6.5mm, 6.8mm, 7mm, 7.2mm, 7.5mm, 7.8mm or 8mm, etc.

[0078] In one embodiment, Figure 5 As shown, the main body 10 has a clamping section 15. Along the direction perpendicular to the opening end surface 111, the clamping section 15 and the pressing section 322 overlap in the same plane. The main body 10 and the pressing section 322 partially overlap in the same plane. The minimum thickness d1 of the clamping section 15 is 0.5mm-3mm, so that the pressing section 322 and the battery housing 30 can be reliably fixed to the pole structure through the clamping section 15, thereby ensuring the fixing strength of the pole structure and preventing the pole structure from causing damage to the battery housing 30.

[0079] Combination Figure 5 As shown, the minimum thickness of the clamping section 15 can be expressed as d1 in a direction perpendicular to the opening end surface 111. The minimum thickness d1 of the clamping section 15 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2mm, 2.1mm, 2.2mm, 2.3mm, 2.4mm, 2.5mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm or 3mm, etc.

[0080] In one embodiment, Figure 7 and Figure 8 As shown, the battery also includes a battery cell 40, which is arranged in the battery shell 30, and a pole ear portion 41 extends from at least one end of the battery cell 40, and the pole ear portion 41 includes at least two single-layer pole ears, and the pole ear portion 41 is electrically connected to the pole column structure. The thickness of the single-layer pole ear is x, and S2 / x is 1100mm-600000mm, thereby ensuring the connection strength between the pole ear portion 41 and the pole column structure, ensuring the current flow capacity between the two, and avoiding the pole ear portion 41 being too weak and easy to be damaged.

[0081] The ratio of the area S2 of the connecting end face 12 to the thickness x of the single-layer pole ear is too small, the electrical connection area between the connecting end face 12 and the pole ear portion 41 is narrow, and local stress is easily concentrated, resulting in tearing of the pole ear portion 41; the ratio of the area S2 of the connecting end face 12 to the thickness x of the single-layer pole ear is too large, the strength of the single-layer pole ear is weak, it is difficult to bear force, and there is a risk of tearing due to bending and deformation.

[0082] The thickness x of the single-layer tab may be 3 μm-17 μm. For example, the thickness x of the single-layer tab may be 3 μm, 4 μm, 5 μm, 6 μm, 8 μm, 10 μm, 15 μm, 16 μm or 17 μm, etc.

[0083] The ratio of the area S2 of the connecting end surface 12 to the thickness x of the single-layer tab can be 1100mm, 1200mm, 1300mm, 1400mm, 1500mm, 1600mm, 1700mm, 1800mm, 2000mm, 2500mm, 2800mm, 3000mm, 4000mm, 5000mm, 6000mm, 7000mm, 8000mm, 9000mm, 10000mm, 11000mm, 15000mm, 20000mm, 25000mm, 30000mm, 40000mm, 50000mm, 60000mm, 70000mm, 80 ...0000mm, 10000mm, 10000mm, 100000mm, 100000mm, 100000mm, 100000mm, 10 0000mm, 100000mm, 110000mm, 120000mm, 150000mm, 180000mm, 200000mm, 210000mm, 220000m, 250000mm, 280000mm, 300000mm, 310000mm, 320000m, 350000mm, 380000mm, 400000mm, 410000mm, 420000m, 450000mm, 480000mm, 500000mm, 510000mm, 520000m, 550000mm, 580000mm or 600000mm, etc.

[0084] An embodiment of the utility model further provides a battery, Figures 1 to 10 As shown, the battery includes the above-mentioned battery housing assembly, and the battery also includes a battery cell 40 , the battery cell 40 is arranged in the battery housing 30 , and the pole structure is electrically connected to the battery cell 40 .

[0085] A battery according to an embodiment of the utility model includes a battery shell assembly and a battery cell 40, wherein the battery cell 40 is arranged in the battery shell 30, and the pole structure is electrically connected to the battery cell 40, and the pole structure is arranged on the battery shell 30, and the pole structure includes a main body 10, wherein the main body 10 is formed with a groove 11, thereby reducing the overall production cost of the pole structure, and the area of ​​the opening end face 111 of the groove 11 is S1, the area of ​​the connecting end face 12 of the main body 10 away from the groove 11 is S2, the depth of the groove 11 is h1, and the distance between the bottom wall 112 of the groove 11 and the connecting end face 12 is h2. By making (S1×h1) / (S2×h2) be 0.05-15, not only the manufacturing cost of the main body 10 can be effectively controlled, but also the main body 10 can have a certain structural strength, which can ensure the overall current-carrying capacity without increasing the risk of deformation of the battery shell 30 due to excessive strength, thereby reliably improving the safe use performance of the battery.

[0086] In one embodiment, Figures 7 to 9 As shown, the battery also includes a battery cell 40, which is arranged in the battery shell 30, and at least one end of the battery cell 40 extends a pole ear portion 41, and the pole ear portion 41 includes at least two single-layer pole ears, and at least one single-layer pole ear surface is provided with a protrusion 42, and the size of the protrusion 42 along the large surface direction after the single-layer pole ear is flattened is 20μm-200μm. While ensuring the connection strength between the pole ear portion 41 and the pole structure, the protrusion 42 is prevented from being too large in size, which affects the fit between the single-layer pole ears and avoids the risk of cold welding in subsequent welding. Therefore, the connection ability between the pole ear portion 41 and the pole structure can be guaranteed, and then the current passing capacity between the pole ear portion 41 and the pole structure can be guaranteed.

[0087] At least one single-layer pole tab has a protruding portion 42 on its surface, that is, after the single-layer pole tab is flattened along the lead-out end, the protruding portion 42 is protruding from the larger surface of the single-layer pole tab. The size of the protrusion 42 along the large surface direction after the single-layer pole ear is flattened can be 20μm, 25μm, 30μm, 35μm, 40μm, 45μm, 50μm, 55μm, 60μm, 65μm, 70μm, 75μm, 80μm, 85μm, 90μm, 95μm, 100μm, 125μm, 130μm, 135μm, 140μm, 145μm, 150μm, 155μm, 160μm, 165μm, 170μm, 175μm, 180μm, 185μm, 190μm, 195μm or 200μm, etc. One or more protrusions 42 can be provided on the surface of the single-layer pole ear.

[0088] In one embodiment, Figure 7As shown, the battery also includes a battery cell 40, which is arranged in the battery shell 30, and a pole ear portion 41 extends from at least one end of the battery cell 40, and the pole ear portion 41 includes at least two single-layer pole ears, and the pole ear portion 41 is directly welded and electrically connected to the pole structure, that is, the pole ear portion 41 and the pole structure can be connected without an intermediate structure such as an adapter, thereby reducing the number of batteries used, thereby reducing the overall weight of the battery, thereby ensuring the energy density of the battery.

[0089] The pole ear portion 41 and the pole column structure may be connected by resistance welding, or the pole ear portion 41 and the pole column structure may be connected by laser welding, etc.

[0090] It should be noted that, in some embodiments, it is not excluded that the pole ear portion 41 and the pole structure may be connected via an adapter.

[0091] In one embodiment, the pole ear portion 41 is welded and electrically connected to the connecting end face 12 of the pole column structure close to the battery cell 40, and S1 / S2≤4.8. This can ensure the area S2 of the connecting end face 12 and avoid the stress concentration on the pole ear portion 41 caused by the small contact area between the pole ear portion 41 and the connecting end face 12, thereby ensuring the connection stability between the pole ear portion 41 and the pole column structure and improving the safe use performance of the battery.

[0092] One or more battery cells 40 may be disposed in the battery housing 30 , which is not limited here.

[0093] It should be noted that the battery includes a cell and an electrolyte, which is the smallest unit capable of performing electrochemical reactions such as charging / discharging. 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 pole ear of the cell can be electrically connected to the pole structure, for example, the pole ear of the cell can be directly electrically connected to the pole structure, or the pole ear of the cell can be electrically connected to the pole structure through a transition piece.

[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] It should be noted that an extreme thrust test may be performed on the above-mentioned battery to determine whether the battery can meet the safety requirements for use.

[0099] Test method:

[0100] 1. Install the pole structure on the battery housing 30. Furthermore, the pole structure can be riveted to the cover plate of the battery housing 30.

[0101] 2. Perform thrust test on the above battery by using the D series electronic universal testing machine of China Machinery Testing Equipment Co., Ltd. (for example, the electronic universal testing machine with specification of DF13.204D / DF13.204T can be selected);

[0102] 3. Fix the cover plate on the thrust machine;

[0103] 4. Use a thrust machine to apply thrust along the Z axis at a speed of 50 mm / min until the pole structure falls off and record the peak thrust force value.

[0104] 5. The maximum thrust is less than 1000N, which does not meet the safety requirements for battery use.

[0105]

[0106]

[0107]

[0108] In the above table, the unit of S1×h1 is mm 3 , the unit of S2×h2 is mm 3 , the unit of limit thrust is N.

[0109] An embodiment of the utility model further provides a battery pack, comprising the above-mentioned battery.

[0110] A battery pack according to an embodiment of the utility model includes a battery, which includes a pole structure and a battery shell 30. The pole structure is arranged on the battery shell 30, and the pole structure includes a main body 10. The main body 10 is formed with a groove 11, thereby reducing the overall production cost of the pole structure. The area of ​​an opening end face 111 of the groove 11 is S1, the area of ​​a connecting end face 12 of the main body 10 away from the groove 11 is S2, the depth of the groove 11 is h1, and the distance between the bottom wall 112 of the groove 11 and the connecting end face 12 is h2. By making (S1×h1) / (S2×h2) 0.02-30, not only the manufacturing cost of the main body 10 can be effectively controlled, but also the main body 10 can have a certain structural strength, which can ensure the overall current flow capacity without increasing the risk of deformation of the battery shell 30 due to excessive strength, thereby reliably improving the safe use performance of the battery pack.

[0111] In one embodiment, the battery pack is a battery module or a battery pack.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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: The invention comprises a battery housing (30) and a pole structure, wherein the pole structure is arranged on the battery housing (30), and the pole structure comprises a main body (10), wherein the main body (10) is formed with a groove (11), wherein the groove (11) has an open end surface (111), wherein the area of ​​the open end surface (111) is S1, and the area of ​​a connecting end surface (12) of the main body (10) which is away from the groove (11) is S2, wherein the depth of the groove (11) is h1, and the distance between the bottom wall (112) of the groove (11) and the connecting end surface (12) is h2, and 0.02≤(S1×h1) / (S2×h2)≤30.

2. The battery housing assembly according to claim 1, characterized in that: 20mm2≤S1≤1960mm 2 , and / or, 18mm 2 ≤S2≤1900mm 2 , and / or, 0.6≤S1 / S2≤5.

3. The battery housing assembly according to claim 1, characterized in that: 0.08≤h1 / h2≤6, and / or, 0.5mm≤h1≤11mm, and / or, 1.5mm≤h2≤8mm.

4. The battery housing assembly according to claim 1, characterized in that: The maximum area enclosed by the circumferential outer surface of the main body (10) is S3, 1.05≤S3 / S1≤4, and / or, 1.1≤S3 / S2≤6.

5. The battery housing assembly according to claim 1, characterized in that: The groove (11) comprises a first section (113) and a second section (114), the first section (113) and the second section (114) are connected, the first section (113) has the bottom wall (112), and the second section (114) has the opening end surface (111); The area of ​​the opening end surface (111) is larger than the area of ​​the bottom wall (112), and / or the area enclosed by the circumferential outer edge of the bottom end of the second section (114) is larger than the area of ​​the bottom wall (112).

6. The battery housing assembly according to claim 5, characterized in that: The ratio of the area of ​​the opening end surface (111) to the area of ​​the bottom wall (112) is 1.2-9, and / or the ratio of the area S4 enclosed by the circumferential outer edge of the bottom end of the second section (114) to the area S5 of the bottom wall (112) is 1.02-4.

7. The battery housing assembly according to claim 1, characterized in that: The distance between the opening end surface (111) and the circumferential outermost edge of the end of the main body (10) having the opening end surface (111) is m, and 0.1 mm≤m≤5 mm.

8. The battery housing assembly according to any one of claims 1 to 7, characterized in that: The pole structure further comprises a shielding member (20), wherein the shielding member (20) is arranged in the groove (11), and S1 / S2≥0.

8.

9. The battery housing assembly according to any one of claims 1 to 7, characterized in that: The battery housing (30) is provided with a pole through hole (31), at least a portion of the main body (10) is inserted into the pole through hole (31), the battery housing (30) is provided with a fixing portion (32), at least a portion of the fixing portion (32) is arranged around the pole through hole (31), the fixing portion (32) is bent into a connecting section (321) and a pressing section (322), the connecting section (321) is arranged on the battery housing (30), and the pressing section (322) is pressed on the main body (10), so that the main body (10) is clamped between the pressing section (322) and the battery housing (30).

10. The battery housing assembly according to claim 9, characterized in that: 0.08≤(S1×h1) / (S2×h2).

11. The battery housing assembly according to claim 9, characterized in that: The area of ​​the pole through hole (31) is not less than S2.

12. The battery housing assembly according to claim 9, characterized in that: The minimum thickness of the fixing portion (32) is 0.3 mm-1.5 mm, and / or the width of the pressing section (322) is a, a / S1 is 0.0006-0.38, and / or the width a of the pressing section (322) is 1 mm-8 mm.

13. The battery housing assembly according to claim 9, characterized in that: The main body (10) has a clamping section (15), and along the direction perpendicular to the opening end surface (111), the clamping section (15) and the pressing section (322) coincide with each other in the same plane. The main body (10) and the pressing section (322) coincide with each other in the same plane. The minimum thickness d1 of the clamping section (15) is 0.5 mm-3 mm.

14. A battery, characterized in that: A battery housing assembly comprising the battery housing assembly according to any one of claims 1 to 13, wherein the battery further comprises a battery cell (40), wherein the battery cell (40) is disposed in the battery housing (30), and wherein a pole structure is electrically connected to the battery cell (40).

15. The battery according to claim 14, characterized in that A pole ear portion (41) extends from at least one end of the battery cell (40), the pole ear portion (41) comprises at least two single-layer pole ears, the pole ear portion (41) is electrically connected to the pole column structure, the thickness of the single-layer pole ear is x, and S2 / x is 1100mm-600000mm.

16. The battery according to claim 14, characterized in that A pole ear portion (41) extends from at least one end of the battery cell (40), the pole ear portion (41) comprising at least two single-layer pole ears, at least one of the single-layer pole ears having a protrusion (42) disposed on its surface, the protrusion (42) having a dimension of 20 μm-200 μm in a direction perpendicular to the large surface of the single-layer pole ear after being flattened.

17. The battery according to claim 14, characterized in that A pole ear portion (41) extends from at least one end of the battery cell (40), the pole ear portion (41) comprises at least two single-layer pole ears, and the pole ear portion (41) is directly welded and electrically connected to the pole structure.

18. The battery according to claim 17, characterized in that The pole ear portion (41) is electrically connected to a connection end surface (12) of the pole structure close to the battery core (40) by welding, and S1 / S2≤4.

8.

19. The battery according to any one of claims 14 to 18, characterized in that The battery is a quadrangular prism battery.

Images