Batteries and battery packs

Abstract

The present invention relates to the field of battery technology, and discloses a battery and a battery pack, including a shell with a through hole, the shell including: a main body; a pole supporting part, the outer periphery of the pole supporting part is connected to the main body, the inner periphery of the pole supporting part extends in a direction away from the main body, and the outer surface of the pole supporting part is formed with a mounting groove, the wall thickness of the main body is H, and the wall thickness of the pole supporting part is K; the pole is arranged corresponding to the mounting groove, the distance between the inner surface of the pole and the outer surface of the main body where the through hole is located is C, and it satisfies ‑(H+K)≤C≤1.5mm; a fixing structure, connecting the main body and the outer periphery of the pole, and the fixing structure is arranged corresponding to the mounting groove. The present invention uses the pole supporting part to support the pole, and the inner surface of the pole is arranged in the through hole or outside the outer surface of the main body, that is, the inner surface of the pole will not extend out of the inner surface of the pole supporting part, which avoids the pole occupying the accommodation space of the pole group and improves the space utilization rate of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to batteries and battery packs. Background Art

[0002] A battery generally includes an internal battery structure and an external battery structure. The internal battery structure mainly includes a pole group, and the external battery structure mainly includes a battery shell, which provides a storage space for the pole group. The battery shell is provided with a pole, which is electrically connected to the pole group to lead out the power of the battery. However, in the prior art, the pole usually extends out of the battery shell and enters the storage space to facilitate connection with the pole group, which causes the storage space to be additionally occupied, resulting in a reduction in the battery space utilization rate. Summary of the invention

[0003] In view of this, the present invention provides a battery and a battery pack to solve the problem of low space utilization of existing batteries.

[0004] In a first aspect, the present invention provides a battery, comprising a shell, the shell being provided with a through hole, the shell comprising: a main body; a pole supporting portion, the pole supporting portion being annular in structure, the outer periphery of the pole supporting portion being connected to the main body, the inner periphery of the pole supporting portion extending in a direction away from the main body so that the inner periphery of the pole supporting portion is surrounded to form the through hole, the outer surface of the pole supporting portion being formed with a mounting groove, the wall thickness of the main body being H, and the wall thickness of the pole supporting portion being K; a pole, being arranged corresponding to the mounting groove, the distance between the inner surface of the pole and the outer surface of the main body where the through hole is located being C, satisfying -(H+K)≤C≤1.5mm, wherein the outer surface of the main body is taken as 0, the direction within the outer surface of the main body is negative, and the direction outside the outer surface of the main body is positive; a fixing structure, connecting the main body and the outer periphery of the pole, the fixing structure being arranged corresponding to the mounting groove.

[0005] Beneficial effect: The pole is supported by the pole supporting part, and by limiting the distance between the inner surface of the pole and the outer surface of the main body, the inner surface of the pole is arranged in the through hole or outside the outer surface of the main body, that is, the inner surface of the pole will not extend beyond the inner surface of the pole supporting part, thereby avoiding the pole occupying the accommodation space of the pole group and improving the space utilization rate of the battery.

[0006] In an optional implementation manner, the wall thickness H of the main body and the wall thickness K of the pole supporting portion satisfy 0.5 mm ≤ K ≤ H; and / or,

[0007] The distance between the outer surface of the pole and the outer surface of the body where the through hole is located is D, and D≤3.2 mm; and / or,

[0008] The outer surface of the pole supporting portion protrudes outward at one end close to the through hole to form a bulge; the battery also includes a sealing ring, which is arranged between the pole and the pole supporting portion, and the sealing ring has a positioning groove, and the bulge is plugged into the positioning groove.

[0009] Beneficial effect: 0.5mm≤K≤H, while ensuring the structural strength of the pole supporting part, it is convenient for the pole supporting part to be stamped and formed in the battery;

[0010] Making D ≤ 3.2 mm is beneficial to improving the volume energy density of the battery;

[0011] When installing the sealing ring, the positioning groove on the sealing ring is plugged into the convex bump on the pole supporting part to achieve the positioning installation of the sealing ring, ensure the position accuracy of the sealing ring, and limit the sealing ring after the sealing ring is installed to ensure the stability of the sealing ring.

[0012] In an optional embodiment, along the axial direction of the through hole, the height of the convex hull is h1, satisfying 0

[0013] Beneficial effect: 0

[0014] By making 0.3mm≤w≤2mm, it is easy to stamp the convex bump while avoiding taking up too much space to affect the arrangement of other components of the main body or increase the overall size of the battery.

[0015] In an optional embodiment, a groove is provided on the outer surface of the main body, the groove is arranged around the pole supporting portion and is connected to the mounting groove; the fixing structure includes an insulating member and a support ring, the support ring is arranged corresponding to the mounting groove and is welded to the main body to form a weld, the weld is suitable for protruding into the groove, and the insulating member is connected to the pole and the support ring at the same time and is located between the pole and the support ring.

[0016] Beneficial effect: By providing a groove to accommodate the weld, the weld is prevented from protruding from the outer surface of the main body and affecting the assembly of other parts.

[0017] In an optional implementation, along the axial direction of the through hole, the depth of the groove is h2, satisfying 0.1 mm ≤ h2 ≤ 0.5 mm.

[0018] Beneficial effect: 0.1mm≤h2≤0.5mm, while ensuring sufficient height to accommodate the weld, avoiding a significant weakening of the rigidity of the main body. ​​

[0019] In an optional embodiment, along the width direction of the battery, the maximum width between the two side edges of the groove is B, and the plane width of one side of the main body where the groove is located is A, satisfying 15%≤B / A≤90%.

[0020] Beneficial effect: 15%≤B / A≤90%, which ensures that the pole has enough surface area to be welded with the pole group, and facilitates the processing and molding of the main body and the coating quality of the main body.

[0021] In an optional embodiment, the main body is provided with an explosion-proof valve hole, and the explosion-proof valve hole is a stepped hole to form a step structure on the main body; the battery also includes an explosion-proof valve, which is arranged in the explosion-proof valve hole and connected to the step structure, and the explosion-proof valve is arranged corresponding to the outer surface of the step structure or the explosion-proof valve is arranged corresponding to the inner surface of the step structure.

[0022] In an optional embodiment, the outer surface of the main body protrudes outwardly at an edge close to the explosion-proof valve hole to form a blocking portion, and the blocking portion is arranged along the circumference of the explosion-proof valve hole.

[0023] Beneficial effect: By setting the blocking part, electrolyte or other liquids are prevented from flowing to the explosion-proof valve to cause pollution of the explosion-proof valve.

[0024] In an optional implementation, the shell is a cover plate or a shell.

[0025] In a second aspect, the present invention further provides a battery pack, comprising the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A partial structural schematic diagram of a battery according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1 A top view of the battery shown;

[0029] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure of XX;

[0030] Figure 4 for Figure 3A partial enlarged schematic diagram of I in the middle;

[0031] Figure 5 for Figure 4 a dimensioned schematic diagram of the structure shown;

[0032] Figure 6 This is a schematic structural diagram of a main body and an explosion-proof valve according to an embodiment of the present invention;

[0033] Figure 7 for Figure 6 A top view of the main body and explosion-proof valve is shown;

[0034] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure of YY;

[0035] Fig. 9 for Figure 8 A partial enlarged schematic diagram of middle E;

[0036] Fig.10 for Figure 8 A partial enlarged schematic diagram of middle F;

[0037] Fig.11 for Fig.10 Another structural diagram of ;

[0038] Fig.12 It is a structural schematic diagram of another main body and explosion-proof valve according to an embodiment of the present invention;

[0039] Fig.13 for Fig.12 A top view of the main body and explosion-proof valve is shown;

[0040] Fig.14 for Fig.13 Schematic diagram of the cross-sectional structure of the middle ZZ;

[0041] Fig.15 for Fig.14 A partial enlarged schematic diagram of G in the middle;

[0042] Fig.16 for Fig.15 Another structural diagram of ;

[0043] Fig.17 for Figure 3 Schematic diagram of the structure of the middle sealing ring;

[0044] Fig.18 for Figure 2 The battery shown is a cross-sectional view in the JJ direction when it has a pole group;

[0045] Fig.19 It is a schematic structural diagram of an embodiment of the present invention in which the inner surface of the pole is located within the outer surface of the main body;

[0046] Fig. 20 It is a schematic structural diagram of the case where the inner surface of the pole of the embodiment of the present invention is flush with the outer surface of the main body;

[0047] Fig.21 It is a schematic structural diagram of an embodiment of the present invention in which the inner surface of the pole is located outside the outer surface of the main body.

[0048] Description of reference numerals:

[0049] 1. Main body; 11. Through hole; 111. Mounting groove; 12. Groove; 13. Explosion-proof valve hole; 14. Step structure; 15. Liquid filling port; 2. Pole supporting part; 3. Pole; 4. Fixed structure; 41. Insulator; 42. Support ring; 5. Bump; 6. Sealing ring; 61. Positioning groove; 7. Explosion-proof valve; 8. Blocking part; 81. Notch; 9. Lower plastic; 100. Pole group; 101. Pole ear. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0051] Combine the following Figures 1 to 21 , describing an embodiment of the present invention.

[0052] According to an embodiment of the present invention, on the one hand, a battery is provided, including a shell, the shell is provided with a through hole 11, and the shell includes: a main body 1; a pole support part 2, the pole support part 2 is annular, the outer periphery of the pole support part 2 is connected to the main body 1, the inner periphery of the pole support part 2 extends in a direction away from the main body 1, so that the inner periphery of the pole support part 2 is surrounded to form the through hole 11, and the outer surface of the pole support part 2 is formed with a mounting groove 111; a pole 3, which is arranged corresponding to the mounting groove 111; a fixing structure 4, which connects the main body 1 and the outer periphery of the pole 3, and the fixing structure 4 is arranged corresponding to the mounting groove 111. Figure 5 As shown, the wall thickness of the main body 1 is H, the wall thickness of the pole supporting portion 2 is K, and the distance between the inner surface of the pole 3 and the outer surface of the main body 1 where the through hole 11 is located is C, satisfying -(H+K)≤C≤1.5mm, wherein the outer surface of the main body 1 is 0, the direction inside the outer surface of the main body 1 is negative, and the direction outside the outer surface of the main body 1 is positive.

[0053] The pole 3 is supported by the pole supporting portion 2, and the distance between the inner surface of the pole 3 and the outer surface of the main body 1 is limited so that the inner surface of the pole 3 is arranged in the through hole or outside the outer surface of the main body 1, that is, the inner surface of the pole 3 does not extend out of the inner surface of the pole supporting portion 2, thereby avoiding the pole 3 occupying the accommodating space of the pole group 100 and improving the space utilization rate of the battery.

[0054] It is worth noting that if Figure 5 and Fig.19 As shown, when -(H+K)≤C<0, it means that the inner surface of the pole 3 is located within the outer surface of the main body 1, and the inner surface of the pole 3 does not extend beyond the inner surface of the pole supporting portion 2; Fig. 20 As shown, when C=0, it means that the inner surface of the pole 3 is flush with the outer surface of the body 1; Fig.21 As shown, when 0<C≤1.5mm, it means that the inner surface of the pole 3 is located outside the outer surface of the main body 1, and the distance between the inner surface of the pole 3 and the outer surface of the main body 1 is not greater than 1.5mm.

[0055] It should be further explained that if C<-(H+K), it is easy for the inner surface of the pole 3 to extend out of the inner surface of the pole supporting part 2, causing the pole 3 to occupy the accommodation space, which is not conducive to improving the volume energy density of the battery; if C>1.5mm, when the distance between the outer surface of the pole 3 and the outer surface of the main body 1 is constant, the overall height of the pole 3 will be small, that is, the pole 3 is too thin, affecting the welding of the pole 3 and the busbar.

[0056] It should be noted that the pole lug 101 of the pole group 100 extends into the through hole 11 and is electrically connected to the inner surface of the pole 3; or, the pole lug 101 of the pole group 100 is connected to the busbar or the adapter, and the busbar or the adapter then extends into the through hole 11 and is electrically connected to the inner surface of the pole 3.

[0057] It is worth noting that the housing can be a shell or a cover. Figure 3 As shown, the outer shell is a shell, one end of the shell is open, the interior of the shell forms a storage space for the pole group 100, the inner surface of the shell is the side of the shell facing the storage space, and the outer surface of the shell is the side of the shell away from the storage space; further, as Figure 3 As shown, the through hole 11 is provided on a side of the shell body opposite to the opening (ie, a side formed by the length direction and the width direction of the battery), and correspondingly, the pole supporting portion 2, the pole 3 and the fixing structure 4 are also arranged corresponding to this side.

[0058] Of course, in other alternative embodiments, the outer shell may also be a cover plate, which is connected to the shell and blocks the opening, the inner surface of the cover plate is the side of the cover plate facing the accommodating space, and the outer surface of the cover plate is the side of the cover plate facing away from the accommodating space.

[0059] In one embodiment, Figure 5 As shown, the wall thickness H of the main body 1 and the wall thickness K of the pole support part 2 satisfy 0.5mm≤K≤H. While ensuring the structural strength of the pole support part 2, it is convenient for the pole support part 2 to be stamped and formed on the shell. Specifically, if K<0.5mm, the wall thickness of the pole support part 2 is too small, the structural strength is weak, and deformation is easy to occur; if K>H, the pole support part 2 and the main body 1 cannot be stamped and formed simultaneously, which is not convenient for battery processing.

[0060] In one embodiment, Figure 5 As shown, the distance between the outer surface of the pole 3 and the outer surface of the main body 1 where the through hole 11 is located is D, satisfying D≤3.2mm. Thus, it is beneficial to improve the volume energy density of the battery. Specifically, if the outer surface of the pole 3 protrudes too much from the outer surface of the main body 1, the overall volume of the battery increases, thereby reducing the volume energy density of the battery.

[0061] The following is an inspection of the shells with different H and K, and the inspection results of the embodiment shell and the comparative example shell are shown in Table 1 and Table 2. The embodiment shell is a shell whose H and K values ​​meet the requirements of this embodiment, and correspondingly, the comparative example shell is a shell whose H and K values ​​do not meet the requirements of this embodiment.

[0062] Table 1 Example shell inspection results

[0063]

[0064] Table 2 Comparative Example Shell Inspection Results

[0065]

[0066] In one embodiment, Figure 4 , Figure 5 as well as Fig. 9 As shown, the outer surface of the pole supporting portion 2 protrudes outward at one end close to the through hole 11 to form a convex bulge 5; Figure 4 and Figure 5 As shown, the battery further includes a sealing ring 6, which is disposed between the pole 3 and the pole supporting portion 2. Fig.17As shown, the sealing ring 6 has a positioning groove 61, and the convex bump 5 is plugged in with the positioning groove 61. When installing the sealing ring 6, the positioning groove 61 on the sealing ring 6 is plugged in with the convex bump 5 on the pole supporting part 2 to achieve the positioning installation of the sealing ring 6, ensure the position accuracy of the sealing ring 6, and after the sealing ring 6 is installed, the sealing ring 6 can be limited to ensure the stability of the sealing ring 6.

[0067] It should be noted that if Figure 6 , Figure 7 , Fig.12 and Fig.13 As shown, the convex bulge 5 is provided in a whole circle along the circumferential direction, and correspondingly, the positioning groove 61 is also provided in a whole circle on the sealing ring 6 to cooperate with the convex bulge 5. Of course, in other alternative embodiments, the convex bulge 5 can be provided only partially at one end of the pole supporting part 2 close to the through hole 11, that is, provided in one section or several sections, and correspondingly, the positioning groove 61 can also be provided in one section or several sections on the sealing ring 6.

[0068] It is worth mentioning that please refer to Figure 4 The inner ring of the sealing ring 6 extends from the inner wall of the pole supporting part 2 close to the through hole 11 (that is, the inner periphery of the pole supporting part) to the through hole 11; for further information, please refer to Fig.18 The battery also includes a lower plastic 9, which is arranged corresponding to the inner surface of the main body 1. The lower plastic 9 has a connecting hole, which is connected to the through hole 11. The portion of the lower plastic 9 located at the edge of the connecting hole extends into the through hole 11 and abuts against the sealing ring 6.

[0069] In one embodiment, Fig. 9 As shown, along the axial direction of the through hole 11, the height of the convex h1 is h1, which satisfies 0

[0070] It is worth noting that the axial direction of the through hole 11 is the wall thickness direction of the main body 1 .

[0071] In one embodiment, Fig. 9 ​As shown, the width of the convex bump 5 from the side close to the through hole 11 to the side away from the through hole 11 is w, which satisfies 0.3mm≤w≤2mm. Setting 0.3mm≤w≤2mm facilitates the stamping of the convex bump 5 while avoiding taking up too much space and affecting the arrangement of the remaining components of the main body 1 or causing the overall size of the battery to increase. Specifically, if the value of w is too small, it is not convenient for the processing and forming of the convex bump 5; if the value of w is too large, it will occupy too much width of the installation groove 111, resulting in a reduction in the installation space left for the sealing ring 6 and the fixed structure 4, which is not convenient for the arrangement of the sealing ring 6 and the fixed structure 4. However, if it is to leave enough installation space for components such as the sealing ring 6 and the fixed structure 4, the length and width of the main body 1 will increase, resulting in the overall size of the battery being too large.

[0072] It is worth noting that the through hole 11 can be square, circular, or oblong (racetrack-shaped). Fig. 9 , the width of the convex hull 5 is the distance from the left side to the right side of the convex hull 5.

[0073] In one embodiment, Figure 4 and Fig. 9 As shown, the outer surface of the main body 1 is provided with a groove 12, which is arranged around the pole supporting portion 2 and communicated with the mounting groove 111; the fixing structure 4 includes an insulating member 41 and a support ring 42, which is arranged corresponding to the mounting groove 111 and welded to the main body 1 to form a weld, and the weld is suitable for protruding into the groove 12, and the insulating member 41 is connected to the pole 3 and the support ring 42 at the same time and is located between the pole 3 and the support ring 42. By providing the groove 12 to accommodate the weld, it is prevented that the weld protrudes from the outer surface of the main body 1 and affects the assembly of other components.

[0074] Specifically, Figure 4 As shown, the lower ring body of the support ring 42 is arranged in the installation groove 111 , and the outer periphery of the lower ring body is welded to the main body 1 .

[0075] It is worth noting that the insulating member 41 is an upper plastic, and the upper plastic formed by injection molding connects the pole 3 and the support ring 42 .

[0076] In one embodiment, Fig. 9 As shown, along the axial direction of the through hole 11, the depth of the groove 12 is h2, which satisfies 0.1mm≤h2≤0.5mm. 0.1mm≤h2≤0.5mm is set to ensure that there is enough height to accommodate the weld while avoiding a significant weakening of the rigidity of the main body 1. Specifically, if the value of h2 is too small, the weld is likely to extend out of the groove 12, which will still affect the assembly of the remaining components on the main body 1; if the value of h2 is too large, the rigidity of the main body 1 will be greatly weakened, affecting the safety and stability of the battery.

[0077] In one embodiment, Figure 7 As shown, along the width direction of the battery, the maximum width between the two side edges of the groove 12 is B, and the plane width of one side of the main body 1 where the groove 12 is located is A, which satisfies 15%≤B / A≤90%. When 15%≤B / A≤90%, while ensuring that the pole 3 has sufficient surface area to be welded with the pole group 100, it is convenient for the processing and forming of the main body 1 and the coating quality of the main body 1. If the value of B / A is too small, that is, the area left for the opening of the through hole 11 is too small, the size of the pole 3 is too small, so the area of ​​the pole 3 used for electrical connection with the pole group 100 is also too small, which is not convenient for the pole 3 to be electrically connected with the pole group 100 by welding, and the heat generated by welding easily causes the upper plastic to melt; if the value of B / A is too large, that is, the size occupied by the groove 12 along the width direction is too large, the remaining edge size along the width direction is too small, which is not convenient for the processing and forming of the main body 1, and the insulating film coated on the outside of the battery is prone to warping.

[0078] It is worth mentioning that please refer to Figure 7 For the shell of this embodiment, a rounded structure is formed on both sides of the surface where the groove 12 is located along the width direction of the battery (that is, the width direction of the shell), the radius of the rounded structure is r, and the outer width of the shell is L, satisfying A=L-2R.

[0079] Of course, for the cover plate in other alternative embodiments, A is the width of the cover plate.

[0080] The following observations are made on the assembly conditions of the housings with different B / A during the assembly process, and the observation results of the embodiment housing and the comparative example housing are shown in Table 3. The embodiment housing is a housing whose B / A value meets the requirements of the embodiment, and correspondingly, the comparative example housing is a housing whose B / A value does not meet the requirements of the embodiment.

[0081] Table 3 Observation results of the embodiment shell and the comparative example shell

[0082]

[0083] In one embodiment, Figures 6 to 16 As shown, the main body 1 is provided with an explosion-proof valve hole 13 , which is a stepped hole to form a step structure 14 on the main body 1 ; the battery further includes an explosion-proof valve 7 , which is arranged in the explosion-proof valve hole 13 and connected to the step structure 14 .

[0084] In one embodiment, Fig.10 and Fig.11 As shown, the explosion-proof valve 7 is arranged corresponding to the outer surface of the step structure 14. Specifically, as Fig.10 As shown, the explosion-proof valve 7 and the step structure 14 are welded by laser penetration welding; or Fig.11 As shown, the edge of the explosion-proof valve 7 and the corresponding edge of the main body 1 located at the explosion-proof valve hole 13 are welded by laser lap welding.

[0085] As an alternative embodiment, Fig.15 and Fig.16 As shown, the explosion-proof valve 7 is arranged corresponding to the inner surface of the step structure 14. Specifically, as Fig.15 As shown, the explosion-proof valve 7 and the step structure 14 are welded by laser penetration welding; or Fig.16 As shown, the edge of the explosion-proof valve 7 and the corresponding edge of the main body 1 located at the explosion-proof valve hole 13 are welded by laser lap welding.

[0086] It is worth noting that the explosion-proof valve 7 has notches, see Figure 6 and Figure 7 After the explosion-proof valve 7 is welded to the main body 1, the notch of the explosion-proof valve 7 is set toward the outside of the main body 1; or, please refer to Fig.12 and Fig.13 After the explosion-proof valve 7 is welded to the main body 1 , the notch of the explosion-proof valve 7 may also be arranged toward the inner side of the main body 1 .

[0087] It should be noted that if Figure 2 , Figure 7 and Fig.13 As shown, the explosion-proof valve hole 13 is an oblong (racetrack-shaped) structure. Figure 2 , Figure 7 and Fig.13 As shown, the long axis of the oblong structure is arranged along the width direction of the battery. Of course, in other alternative embodiments, the long axis of the oblong structure can also be arranged along the length direction of the battery.

[0088] In one embodiment, Fig.15 and Fig.16 As shown, the outer surface of the main body 1 protrudes outward at the edge near the explosion-proof valve hole 13 to form a blocking portion 8, and the blocking portion 8 is arranged along the circumference of the explosion-proof valve hole 13. By providing the blocking portion 8, the electrolyte or other liquid is prevented from flowing to the explosion-proof valve 7 to cause pollution of the explosion-proof valve 7.

[0089] In one embodiment, the battery further includes an explosion-proof valve patch, which is pasted on the main body 1 and covers the explosion-proof valve hole 13. It is worth noting that a notch 81 is provided on the main body 1, and the explosion-proof valve hole 13 is connected to the outside through the notch 81. Therefore, when the explosion-proof valve 7 is subjected to helium inspection, it can be judged whether the explosion-proof valve 7 is leaking through the notch 81 to prevent the explosion-proof valve 7 from leaking and leaking.

[0090] It is worth noting that, in this embodiment, the explosion-proof valve patch can also be pasted on the blocking portion 8 , and a notch 81 can be opened on the blocking portion 8 .

[0091] In one embodiment, Figure 1 , Figure 6 and Fig.12 As shown, a liquid injection port 15 is provided on the main body 1. It is worth noting that the liquid injection port 15 can be provided on the housing or on the cover plate.

[0092] According to another aspect of an embodiment of the present invention, a battery pack is provided, comprising the above-mentioned battery.

[0093] Although the embodiments of the present invention 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 invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A battery, characterized in that: The invention comprises a housing, wherein the housing is provided with a through hole, and the housing comprises: main body; A pole supporting part, wherein the pole supporting part is annular in structure, the outer periphery of the pole supporting part is connected to the main body, the inner periphery of the pole supporting part extends in a direction away from the main body, so that the inner periphery of the pole supporting part is surrounded to form the through hole, a mounting groove is formed on the outer surface of the pole supporting part, the wall thickness of the main body is H, and the wall thickness of the pole supporting part is K; A pole is arranged corresponding to the mounting groove, the distance between the inner surface of the pole and the outer surface of the main body where the through hole is located is C, satisfying 0≤C≤1.5mm, wherein the outer surface of the main body is 0, the direction inside the outer surface of the main body is negative, and the direction outside the outer surface of the main body is positive; the distance between the outer surface of the pole and the outer surface of the main body where the through hole is located is D, satisfying D≤3.2mm; A fixing structure, connecting the main body and the outer periphery of the pole, the fixing structure being arranged corresponding to the mounting groove; The outer surface of the pole supporting portion protrudes outward at one end close to the through hole to form a convex bump; the battery further comprises a sealing ring, which is arranged between the pole and the pole supporting portion, and has a positioning groove, and the convex bump is plugged in with the positioning groove; Along the axial direction of the through hole, the height of the convex hull is h1, satisfying 0<h1≤1mm; and / or, the width of the convex hull from the side close to the through hole to the side away from the through hole is w, satisfying 0.3mm≤w≤2mm.

2. The battery according to claim 1, characterized in that The wall thickness H of the main body and the wall thickness K of the pole supporting portion satisfy 0.5 mm ≤ K ≤ H.

3. The battery according to claim 1 or 2, characterized in that: A groove is provided on the outer surface of the main body, the groove is arranged around the pole supporting portion and is connected to the mounting groove; the fixing structure includes an insulating member and a support ring, the support ring is arranged corresponding to the mounting groove and is welded to the main body to form a weld, the weld is suitable for protruding into the groove, the insulating member is connected to the pole and the support ring at the same time and is located between the pole and the support ring.

4. The battery according to claim 3, characterized in that Along the axial direction of the through hole, the depth of the groove is h2, satisfying 0.1mm≤h2≤0.5mm.

5. The battery according to claim 3, characterized in that Along the width direction of the battery, the maximum width between the two side edges of the groove is B, and the plane width of one side of the main body where the groove is located is A, satisfying 15%≤B / A≤90%.

6. The battery according to claim 1 or 2, characterized in that: The main body is provided with an explosion-proof valve hole, which is a stepped hole to form a step structure on the main body; the battery also includes an explosion-proof valve, which is arranged in the explosion-proof valve hole and connected to the step structure, and the explosion-proof valve is arranged corresponding to the outer surface of the step structure or the explosion-proof valve is arranged corresponding to the inner surface of the step structure.

7. The battery according to claim 6, characterized in that The outer surface of the main body protrudes outwards at an edge close to the explosion-proof valve hole to form a blocking portion, and the blocking portion is arranged along the circumference of the explosion-proof valve hole.

8. The battery according to claim 1 or 2, characterized in that: The shell is a cover plate or a shell.

9. A battery pack, characterized in that: Comprising the battery as claimed in claim 8.

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