Battery housing arrangement and battery

Abstract

Battery housing assembly, characterized in that it comprises: a housing body (1) on which a liquid filling opening (101) is provided, a sealing plastic pin (2) which is at least partially provided in the liquid filling opening (101) and seals the liquid filling opening (101), a sealing metal pin (3) provided on the outside of the sealing plastic pin (2), wherein the sealing metal pin (3) comprises a projection part (301), a deformation part (302) and a connection part (303), wherein the deformation part (302) is provided around the outer circumference of the projection part (301) and the side of the projection part (301) facing the sealing plastic pin (2) protrudes from the side of the deformation part (302) facing the sealing plastic pin (2), wherein the orthographic projection of the projection part (301) on the surface of the housing body (1) along the liquid filling opening (101) is at least partially overlapped with the orthographic projection of the sealing plastic pin (2) on the surface of the housing body (1), wherein the connection part (303) is provided around the outer circumference of the deformation part (302) is provided,wherein the connecting part (303) is welded to the housing body (1), wherein the welding section between the connecting part (303) and the housing body (1) has a melting depth H and a melting width B, wherein the extension length of the deformation part (302) from the side close to the projection part (301) to the connecting part is L and L / (H×B) 0.8 mm, -1 up to 62.5 mm -1 amounts.

Description

TECHNICAL FIELD

[0001] The present utility model relates to the technical field of batteries or accumulators and in particular to a battery housing arrangement and a battery. BACKGROUND

[0002] Currently, after filling a high-capacity battery with liquid and vacuuming, it is necessary to use a plastic pin to seal the liquid filling port; then, a metal pin is welded to the top cap. During helium leak detection of the high-capacity battery, the sealing effect of the plastic pin may be adequate. However, as the sealing plastic pin ages over time during use, it may also lose its sealing effect. In this case, the sealing at the liquid filling port depends on how reliably the metal pin is welded.

[0003] Since the plastic pin initially has good sealing performance, if the welding between the metal pin and the top cap is poor, it will not be possible to detect a helium leak during helium leak detection. As a result, poor welding cannot be correctly detected after the metal pin is welded, and the battery cell with poor airtightness of the metal pin weld cannot be ruled out. Furthermore, the plastic pin may lose its airtightness due to vibration, aging, etc. during long-term use. In this case, the metal pin, with the poor airtightness caused by the welding, is unable to fulfill its sealing function, resulting in battery cell leakage. SUMMARY OF THE UTILITY MODEL

[0004] In view of the above, the present utility model provides a battery case assembly and a battery to solve the problem of the poor detection accuracy of the sealing metal pin during helium leak detection.

[0005] In the first aspect, the present utility model provides a battery case assembly comprising: a case body on which a liquid filling opening is provided; a sealing plastic pin provided at least partially in the liquid filling opening and sealing the liquid filling opening; a sealing metal pin provided on the outside of the sealing plastic pin, the sealing metal pin comprising a projection part, a deformation part, and a connecting part, the deformation part being provided around the outer periphery of the projection part, and the side of the projection part facing the sealing plastic pin protruding from the side of the deformation part facing the sealing plastic pin;wherein the orthographic projection of the projection part on the surface of the housing body along the liquid filling opening is at least partially overlapped with the orthographic projection of the sealing plastic pin on the surface of the housing body, wherein the connecting part is provided around the outer circumference of the deformation part, wherein the connecting part is welded to the housing body, wherein the welding portion between the connecting part and the housing body has a melting depth H and a melting width B, wherein the extension length of the deformation part from the side close to the projection part to the connecting part is L and L / (H×W) is 0.8 mm, -1 -62.5 mm -1 amounts.

[0006] In the second aspect, the present utility model further provides a battery comprising: the above battery case assembly comprising a first case assembly and a second case assembly, wherein the first case assembly and the second case assembly form a receiving space, a battery cell provided in the receiving space, and wherein the sealing metal pin is provided on the side of the sealing plastic pin facing away from the battery cell.

[0007] Advantages: After filling the liquid, the sealing plastic pin is inserted into the liquid filling port and the liquid filling port is sealed. During helium leak detection, the sealing metal pin is pressed down manually or mechanically, and the sealing metal pin simultaneously presses the sealing plastic pin down until the sealing plastic pin is separated from the liquid filling port. After removing the sealing plastic pin, the welding quality of the sealing metal pin can be accurately verified, which can improve the detection accuracy of the sealing metal pin and thus the sealing of the battery cell.

[0008] An appropriate fusion depth and fusion width can not only ensure weld quality but also reduce welding material consumption, while also reducing the likelihood of rework and thus lowering costs. Setting the L / (H×W) in the range of 0.8 mm -1 up to 62.5 mm -1 not only ensures the welding strength between the connecting part and the case body, but also ensures the connection strength between the connecting part and the case body after the sealing metal pin is deformed, thereby reducing the impact of the deformation of the sealing metal pin on the service strength and improving the performance and safety of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] To more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings required for the embodiments or description of the prior art are briefly presented below. It is understood that the drawings described below represent some embodiments of the present utility model. A person of ordinary skill in the art can also create additional drawings based on these drawings without any creative effort. Fig. 1 shows a battery housing assembly according to an embodiment of the present utility model in a perspective view. Fig. 2 shows the Fig. 1 shown battery housing arrangement in a top view. Fig. Figure 3 shows a schematic representation of the battery housing arrangement of Fig. 2 in a cross-sectional view along AA. Fig. 4 shows part B of Fig. 3 in a partially enlarged schematic representation. Fig. 5 shows the Fig. 4 shown structure of the housing body in a schematic representation. Fig. 6 shows the Fig. 4 shown sealing metal pin in a schematic representation. Fig. 7 shows a battery according to an embodiment of the present utility model in a perspective view. Fig. 8 shows the Fig. 7 shown battery in a schematic exploded view.

[0010] In the figures: 1. Housing body, 101 Liquid filling opening, 102 Groove, 1021 Step, 106 Cap plate, 107 Lower housing 2. Sealing plastic pin, 3. Sealing metal pin, 301 projection part, 302 deformation part, 303 connecting part, 4. Insulation net, 5. Battery cell. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0011] To clarify the purpose, technical solutions, and advantages of the embodiment of the present utility model, the technical solution in the embodiment of the present utility model is described clearly and completely in conjunction with the drawings. It is understood that the described embodiment is a part of the embodiment of the present utility model, not all embodiments. Based on the embodiment of the present utility model, all other embodiments created by persons skilled in the art without creative effort fall within the scope of protection of the present utility model.

[0012] The embodiment of the present utility model is described below in connection with the Fig. 1 to 8 described.

[0013] According to one embodiment of the present utility model, a battery case assembly is provided, which includes a case body 1, a sealing plastic pin 2, and a sealing metal pin 3. A liquid filling opening 101 is provided in the case body 1. The sealing plastic pin 2 is at least partially provided in the liquid filling opening 101 and seals the liquid filling opening 101. The sealing metal pin 3 is provided on the outside of the sealing plastic pin 2, and the sealing metal pin 3 includes a projection part 301, a deformation part 302, and a connecting part 303. The deformation part 302 is provided around the outer periphery of the projection part 301. The side of the projection part 301 facing the sealing plastic pin 2 protrudes from the side of the deformation part 302 facing the sealing plastic pin 2.The orthographic projection of the protrusion portion 301 on the surface of the housing body 1 along the liquid filling port 101 at least partially overlaps with the orthographic projection of the sealing plastic pin 2 on the surface of the housing body 1. The connecting portion 303 is provided around the outer periphery of the deformation portion 302, and the connecting portion 303 is welded to the housing body 1. The welding portion between the connecting portion 303 and the housing body 1 has a melting depth H and a melting width B, and the extension length of the deformation portion 302 from the side close to the protrusion portion 301 to the connecting portion 303 is L, and L / (H×W) is 0.8 mm. -1 up to 62.5 mm -1 amounts.

[0014] In the battery case assembly of the present embodiment, after filling the liquid, the sealing plastic pin 2 is inserted into the liquid filling port 101, and the liquid filling port 101 is closed; during helium leak detection, the sealing metal pin 3 is pressed down manually or mechanically, and the sealing metal pin 3 simultaneously presses the sealing plastic pin 2 down until the sealing plastic pin 2 is separated from the liquid filling port 101. After the sealing plastic pin 2 is removed, the welding quality of the sealing metal pin 3 can be accurately detected, thereby improving the detection accuracy of the sealing metal pin 3 and thus the sealing of the battery cell 5.

[0015] While the sealing plastic pin 2 is removed, the deformation of the sealing metal pin 3 may cause its tensile strength, compressive strength and shear strength to decrease and the risk of failure of the sealing metal pin 3 becomes higher, so that the deformation of the sealing metal pin 3 affects the subsequent service life and thereby has a significant impact on the performance and safety of the battery pack.

[0016] The fusion depth and fusion width of the welded portion between the connecting part 303 and the housing body 1 are important parameters for measuring weld quality. A larger fusion depth and fusion width can improve the structural strength of the welded portion. However, too large a fusion depth can lead to excessive melting or excessive material waste, and too large a fusion width can cause excessive heat stress, resulting in weld deformation and poor welding.

[0017] Therefore, appropriate fusion depth and fusion width can not only ensure welding quality, but also reduce the consumption of welding material and at the same time reduce the probability of rework and thereby reduce costs.

[0018] Furthermore, when the extension length L of the deformation part 302 is larger, the force acting on the protrusion part 301 is smaller, and the protrusion part 301 can be moved up and down, and the influence of the connecting part 303 is small while the sealing plastic pin 2 is pressed down. However, the larger the extension length of the deformation part 302 in use, the higher the strength requirements of the welded connecting part 303 are, which in turn brings about the risk of weld breakage and causes sealing failure. If the extension length L of the deformation part 302 is smaller, a larger force must be applied to the protrusion part 301 to move the protrusion part 301 up and down, which has a greater impact on the connecting portion 303 and thereby affects the connection strength between the connecting portion 303 and the housing body 1.

[0019] Therefore, the extension length L of the deformation part 302 and the melting depth and melting width of the welded portion between the connecting portion 303 and the housing body 1 may affect the connection strength between the connecting portion 303 and the housing body 1. The setting L / (H×W) in the range of 0.8 mm -1 up to 62.5 mm -1 not only ensures the welding strength between the connecting portion 303 and the case body 1, but also ensures the connection strength between the connecting portion 303 and the case body 1 after the sealing metal pin 3 is deformed, thereby reducing the impact of the deformation of the sealing metal pin 3 on the service strength and improving the performance and safety of the battery pack.

[0020] Preferably, L / (H×W) is equal to 1, 2, 4, 5, 8, 10, 16, 20, 24, 30, 38, 40, 42, 50, 52, 54, 58 or 60 with the unit mm -1 .

[0021] It should be noted that the outer side of the sealing plastic pin 2 on which the sealing metal pin 3 is provided is the side of the sealing plastic pin 2 facing away from the battery cell 5.

[0022] In one embodiment, L is as shown in Fig. 6, 2 mm to 10 mm. When removing the sealing plastic pin 2, as L is larger, the force exerted on the protrusion part 301 is smaller, the influence on the connecting part 303 is smaller, and the requirement for the elastic modulus of the deformation part 302 is lower. When using the battery case assembly, as L is smaller, the requirement for the strength of the connecting part 303 is lower, and the requirement for the elastic modulus of the deformation part 302 is lower. Therefore, L is in the range of 2 mm to 10 mm, which not only reduces the influence of the connecting part 303 when removing the sealing plastic pin 2, but also ensures the connection strength between the connecting part 303 and the case part 1.

[0023] Preferably, L is 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm or 9 mm.

[0024] In one embodiment, H is equal to 0.2 mm to 1.2 mm and B is equal to 0.8 mm to 2 mm. The melting depth also corresponds to the vertical dimension of the weld section in Fig. 3 and the melt width also corresponds to the lateral dimension of the melt section in Fig. 3. The grey shaded section in Fig. 4 refers to the welding section.

[0025] Furthermore, when the fusion depth is deeper and the fusion width is wider, the weld strength can be improved, thereby improving the tensile strength of the welded portion, but it may result in poor welding, resulting in a high weld failure rate. When the fusion depth and fusion width are smaller, the weld strength is lower and the tensile strength of the welded portion is lower, but the welding time can be shortened, and the thermal expansion and shrinkage of the material during welding are reduced, thus reducing the possibility of weld deformation.

[0026] Therefore, H is in the range of 0.2 mm to 1.2 mm, and B is in the range of 0.8 mm to 2 mm. On the one hand, the weld strength and tensile strength are guaranteed to avoid poor welding, and on the other hand, the thermal expansion and shrinkage of the material during welding are reduced, thus reducing the possibility of weld deformation.

[0027] Preferably, H is 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm or 1 mm and B is 0.9 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm or 1.9 mm.

[0028] In one embodiment, as shown in Fig. 4 and Fig. 6, the diameter D1 of the projection part 301 in the radial direction of the liquid filling opening 101 is smaller than the diameter D2 of the sealing plastic pin 2. The diameter D1 of the projection part 301 also corresponds to the lateral dimension of the projection part 301 in Fig. 6, and the diameter D2 of the sealing plastic pin 2 also corresponds to the lateral dimension of the sealing plastic pin 2 in Fig. 4. When the sealing metal pin 3 presses the sealing plastic pin 2 downward, the protrusion part 301 with a smaller diameter can promote stress concentration, thereby ensuring that the deformation part 302 deforms quickly and reducing the difficulty in removing the sealing plastic pin 2.

[0029] In one embodiment, as shown in Fig. 4 and Fig. 6, the ratio of the diameter D1 of the protruding part 301 to the diameter D2 of the sealing plastic pin 2 is 0.4 to 1.

[0030] Furthermore, if the diameter of the protrusion portion 301 is too small, the pressure generated on the protrusion portion 301 when removing the sealing plastic pin 2 is too great, resulting in increased deformation of the weld seam. If the diameter of the protrusion portion 301 is too large, the deformation portion 302 cannot be deformed quickly, which does not promote stress concentration.

[0031] Therefore, the ratio of D1 to D2 is in the range of 0.4:1, which reduces the deformation at the weld seam when removing the sealing plastic pin 2, ensuring the joint strength and also allowing the deformation part 302 to deform quickly, facilitating the quick removal of the sealing plastic pin 2.

[0032] Specifically, the diameter D1 of the protrusion portion 301 is 0.5 mm to 3 mm, and the diameter D2 of the sealing plastic pin 2 is 1.5 mm to 6 mm.

[0033] Preferably, the diameter D1 of the protrusion part 301 is 0.6 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, 1.8 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm or 2.8 mm, and the diameter D2 of the sealing plastic pin 2 is 1.8 mm, 2 mm, 2.4 mm, 2.8 mm, 3 mm, 3.2 mm, 3.4 mm, 3.6 mm, 4 mm, 4.2 mm, 4.8 mm, 5 mm, 5.2 mm, 5.8 mm.

[0034] In one embodiment, as shown in Fig. 6, the thickness T1 of the deformation part 302 located near the projection part 301 is greater than the thickness T2 of the deformation part 302 located near the connection part 303, and the thickness of the deformation part 302 gradually decreases toward the connection part 303, and the ratio of the thickness T1 of the deformation part 302 located near the projection part 301 to the thickness T2 of the deformation part 302 located near the connection part 303 is 1 to 3.

[0035] Furthermore, if the ratio of T1 to T2 is too large, the strength of the connecting part 303 is too weak, and there is a risk that the welded portion between the connecting part 303 and the case body 1 will break after the deformation of the deformation part 302, thereby compromising the safety of the battery. If the ratio of T1 to T2 is too small, the deformation ability of the deformation part 302 is low, and the deformation part 302 cannot be easily deformed, thereby increasing the difficulty of removing the sealing plastic pin 2.

[0036] Therefore, the ratio of T1 to T2 is in the range of 1 to 3, which not only ensures the structural strength of the connecting part 303 and avoids the breakage of the welding portion, but also facilitates the deformation of the deformation part 302 and enables the rapid removal of the sealing plastic pin 2.

[0037] Specifically, the thickness T1 of the deformation part 302 located close to the projection part 301 is 0.8 mm to 1.5 mm, and the thickness T2 of the deformation part 302 located close to the connection part 303 is 0.5 mm to 1 mm.

[0038] Preferably, the thickness T1 of the deformation part 302 located close to the projection part 301 is 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm or 1.4 mm, and the thickness T2 of the deformation part 302 located close to the connection part 303 is 0.6 mm, 0.7 mm, 0.8 mm or 0.9 mm.

[0039] In one embodiment, as shown in Fig. 6, the thickness T3 of the connecting part 303 is larger than the thickness T2 of the deformation part 302 located close to the connecting part 303. The thicker connecting part 303 can ensure the strength of the connecting part 303 and can also ensure the welding strength between the connecting part 303 and the case body 1, thereby ensuring the safety performance of the battery.

[0040] Furthermore, the thickness T3 of the connecting part 303 is 0.5 mm to 1.5 mm. Preferably, the thickness T3 of the connecting part 303 is 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, or 1.4 mm.

[0041] In one embodiment, as shown in Fig. 4 and Fig. 6, the projection dimension H1 of the projection part 301 protruding from the deformation part 302 is greater than the thickness T4 of the portion of the housing body 1 located near the liquid filling opening 101, with H1 being less than 2 mm. The projection dimension H1 of the projection part 301 protruding from the deformation part 302 is also the vertical dimension of the projection part 301 protruding from the deformation part 302 in Fig. 6, and the thickness of the portion of the housing body 1 located near the liquid filling opening 101 is also the vertical dimension of the portion of the housing body 1 located near the liquid filling opening 101 in Fig. 6.

[0042] Furthermore, if the protrusion dimension H1 of the protrusion portion 301 is too small, the sealing plastic pin 2 cannot be effectively removed. If the protrusion dimension H1 of the protrusion portion 301 is too large, it occupies more space, reduces the space utilization rate of the battery, and has a low energy density.

[0043] Therefore, H1 is larger than T4 and smaller than 2 mm, which effectively removes the sealing plastic pin 2 and occupies less space, improves the space utilization rate of the battery, and has high energy density.

[0044] Specifically, the projection dimension H1 of the projection part 301 projecting from the deformation part 302 is 1 mm to 2 mm, and the thickness T4 of the case body 1 is 1 mm to 3 mm.

[0045] Preferably, the projection dimension H1 of the projection part 301 projecting from the deformation part 302 is 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.6 mm, 1.8 mm, 1.9 mm, and the thickness T4 of the portion of the case body 1 located near the liquid filling port 101 is 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.6 mm, 1.8 mm, 1.9 mm, 2 mm, 2.2 mm, 2.4 mm, 2.6 mm or 2.8 mm.

[0046] In one embodiment, as shown in Fig. 5, a groove 102 connected to the liquid filling opening 101 is provided on the housing body 1, a step 1021 is provided at the edge of the groove 102, and the connecting part 303 is provided on the step 1021, wherein the height H2 of the step 1021 is 0.5 mm to 1.5 mm and the height H2 of the step 1021 is greater than or equal to the minimum thickness of the deformation part 302. The height H2 of the step 1021 also corresponds to the vertical dimension of the step 1021 in Fig. 5.

[0047] Furthermore, if the height of the step 1021 is too small, the connection strength between the connecting part 303 and the housing body 1 cannot be ensured, which may easily increase the risk of sealing failure during use. If the height of the step 1021 is too large, it will occupy more space, reduce the space utilization rate of the battery, and have low energy density.

[0048] Therefore, the height H2 of the step 1021 is in the range of 0.5 mm to 1.5 mm, so that it can ensure the connection strength between the connecting part 303 and the case body 1, occupies less space, improves the space utilization rate of the battery, and has a high energy density.

[0049] Preferably, the height H2 of the step 1021 is 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm or 1.4 mm.

[0050] In one embodiment, an insulating net 4 is provided on the inside of the housing body 1, wherein the insulating net 4 surrounds the outside of the sealing plastic pin 2 to accommodate the sealing plastic pin 2 when the sealing plastic pin 2 falls. When removing the sealing plastic pin 2, the falling sealing plastic pin 2 is accommodated by the insulating net 4 to prevent the sealing plastic pin 2 from falling into the battery cell 5 and causing safety hazards, thereby improving the safety of the battery.

[0051] In one embodiment, the mesh area of ​​the insulation mesh is 4 40 mm 2 up to 200 mm 2If the mesh area of ​​the insulation net 4 is too large, the sealing plastic pin 2 cannot be contained, and the sealing plastic pin 2 falls into the battery cell 5, causing safety hazards. If the mesh area of ​​the insulation net 4 is too small, the filling efficiency is compromised, resulting in a longer manufacturing cycle and higher labor costs, thereby increasing the overall production cost.

[0052] Therefore, the mesh area of ​​the insulation mesh 4 is in the range of 40 mm 2 up to 200 mm 2 On the one hand, it can accommodate the broken sealing plastic pin 2, ensuring the battery's safety. On the other hand, it ensures filling efficiency and reduces costs.

[0053] Preferably the mesh area of ​​the insulation mesh is 4 50 mm 2 , 60 mm 2 , 70 mm 2 , 80 mm 2 , 90 mm 2 , 100 mm 2 , 120 mm 2 , 140 mm2 , 160 mm 2 , 180 mm 2 .

[0054] It should be noted that L, H, B, D1, D2, T1 and T2 all have the unit mm and the mesh area has the unit mm 2 has.

[0055] On the other hand, according to an embodiment of the present utility model, there is also provided a battery comprising: the above battery case assembly and the battery cell 5, wherein the battery case assembly comprises a first case assembly and a second case assembly, and wherein the first case assembly and the second case assembly form an accommodating space, wherein the battery cell 5 is provided in the accommodating space, and wherein the sealing metal pin 3 is provided on the side of the sealing plastic pin 2 facing away from the battery cell 5.

[0056] In one embodiment, the first housing assembly is a cap plate 106, the second housing assembly is a lower housing 107 having a receiving cavity, and the liquid filling opening 101 may be provided on the cap plate 106 or on the lower housing 107.

[0057] Although the embodiments of the present utility model have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present utility model, and such modifications and variations all fall within the scope of protection defined by the appended claims.

Claims

[1] Battery housing arrangement, characterized by that it includes: a housing body (1) on which a liquid filling opening (101) is provided, a sealing plastic pin (2) which is at least partially provided in the liquid filling opening (101) and seals the liquid filling opening (101), a sealing metal pin (3) provided on the outside of the sealing plastic pin (2), wherein the sealing metal pin (3) comprises a projection part (301), a deformation part (302) and a connection part (303), wherein the deformation part (302) is provided around the outer circumference of the projection part (301) and the side of the projection part (301) facing the sealing plastic pin (2) protrudes from the side of the deformation part (302) facing the sealing plastic pin (2), wherein the orthographic projection of the projection part (301) on the surface of the housing body (1) along the liquid filling opening (101) is at least partially overlapped with the orthographic projection of the sealing plastic pin (2) on the surface of the housing body (1), wherein the connection part (303) is provided around the outer circumference of the deformation part (302) is provided,wherein the connecting part (303) is welded to the housing body (1), wherein the welding section between the connecting part (303) and the housing body (1) has a melting depth H and a melting width B, wherein the extension length of the deformation part (302) from the side close to the projection part (301) to the connecting part is L and L / (H×B) 0.8 mm, -1 up to 62.5 mm -1 amounts. [2] Battery housing arrangement according to claim 1, characterized by that L is 2 mm to 10 mm. [3] Battery housing arrangement according to claim 2, characterized by that H is 0.2 mm to 1.2 mm and B is 0.8 mm to 2 mm. [4] Battery housing arrangement according to one of claims 1 to 3, characterized by that the diameter D1 of the projection part (301) in the radial direction of the liquid filling opening (101) is smaller than the diameter D2 of the sealing plastic pin (2). [5] Battery housing arrangement according to claim 4, characterized by that the ratio of the diameter D1 of the projection part (301) to the diameter D2 of the sealing plastic pin (2) is 0.4 to 1. [6] Battery housing arrangement according to one of claims 1 to 3, characterized by that the thickness T1 of the deformation part (302) located close to the projection part (301) is greater than the thickness T2 of the deformation part (302) located close to the connecting part (303), the thickness of the deformation part (302) gradually decreases towards the connecting part (303), and the ratio of the thickness T1 of the deformation part (302) located close to the projection part (301) to the thickness T2 of the deformation part (302) located close to the connecting part (303) is 1 to 3. [7] Battery housing arrangement according to one of claims 1 to 3, characterized bythat the thickness T3 of the connecting part (303) is greater than or equal to the thickness T2 of the deformation part (302) located close to the connecting part (303). [8] Battery housing arrangement according to one of claims 1 to 3, characterized by that the projection dimension H1 of the projection part (301) protruding from the deformation part (302) is greater than the thickness T4 of the portion of the housing body (1) located close to the liquid filling opening (101) and H1 is less than 2 mm. [9] Battery housing arrangement according to one of claims 1 to 3, characterized by that the housing body (1) is provided with a groove (102) which is connected to the liquid filling opening (101), the edge of the groove (102) is provided with a step (1021), the connecting part (303) is provided on the step (1021), the height H2 of the step (1021) is 0.5 mm to 1.5 mm and the height H2 of the step (1021) is greater than or equal to the minimum thickness of the deformation section (302). [10] Battery housing arrangement according to one of claims 1 to 3, characterized by that the insulating net (4) is provided on the inside of the housing body (1) and the insulating net (4) surrounds the outside of the sealing plastic pin (2) in order to receive the sealing plastic pin (2) in the event of the sealing plastic pin (2) falling. [11] Battery housing arrangement according to claim 10, characterized by that the mesh area of ​​the insulating mesh (4) is 40 mm 2 up to 200 mm 2 amounts. [12] Battery, characterized by that it includes: the battery housing assembly according to any one of claims 1 to 11, comprising a first housing assembly and comprises a second housing arrangement, wherein the first housing arrangement and the second housing arrangement form a receiving space, a battery cell (5) provided in the receiving space, and wherein the sealing metal pin (3) is provided on the side of the sealing plastic pin (2) facing away from the battery cell (5).

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