Battery and battery pack

Abstract

The utility model provides a battery and a battery pack, and relates to the technical field of batteries. The battery has a first direction and comprises a top cover sheet and a pole; a pole hole is formed in the top cover plate in a penetrating manner along a first direction; a first convex part, a second concave part, a third convex part and a fourth convex part are sequentially arranged on the side surface of the pole along a first direction; the third convex part is provided with a first surface and a second surface which are connected, the first surface is connected with the second concave part, the first surface is obliquely arranged relative to the first direction, and the second surface is connected with the fourth convex part. In the assembling process, the fourth protruding part and the top cover piece get close to each other under the press-fitting effect of the injection mold. The first surface, connected with the second concave part, of the third convex part is obliquely arranged, so that even if the sealing element is embedded into the groove, the top cover plate can push the sealing element to slide towards the second surface along the first surface, the sealing element is guided to be separated from the groove, the condition of poor assembly is avoided, and the sealing performance of the joint of the pole and the top cover plate is ensured.

Description

Technical Field

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

[0002] Power batteries are the power source that provides power for new energy vehicles. The assembly of power batteries is particularly important. In the related art, a groove is usually set on the outside of the pole of the power battery so that the first insulating member formed by injection molding can be engaged with the pole, thereby realizing the connection between the top cover sheet of the power battery and the pole. However, this assembly structure often has the problem of the seal being embedded in the groove, resulting in insufficient sealing at the connection between the pole and the top cover sheet, which reduces the assembly yield of the power battery. Utility Model Content

[0003] In order to solve the problem of poor sealing assembly in the prior art, one of the purposes of the utility model is to provide a battery.

[0004] The utility model provides the following technical solutions:

[0005] A battery having a first direction, the battery comprising:

[0006] A top cover sheet, wherein a pole hole is formed through the top cover sheet along the first direction; and

[0007] A pole, wherein a first protrusion, a second recess, a third protrusion and a fourth protrusion are sequentially arranged on the side of the pole along the first direction, the first protrusion, the second recess and the third protrusion are penetrated through the pole hole, the diameter of the first protrusion is D1, the diameter of the second recess is D2, the diameter of the third protrusion is D3, the diameter of the fourth protrusion is D4, and D1>D2, D4>D3>D2;

[0008] The third protruding portion has a first surface and a second surface connected to each other, the first surface is connected to the second recessed portion, the first surface is inclined relative to the first direction, and the second surface is connected to the fourth protruding portion.

[0009] As a further optional solution for the battery, the third protrusion also has a third surface connecting the first surface and the second surface, the third surface is located between the first surface and the second surface, the third surface is arranged in an arc shape, and the third surface is tangent to the first surface and the second surface respectively.

[0010] As a further optional solution for the battery, the radius of the third surface is R1, 0.1mm≤R1≤2mm.

[0011] As a further optional solution for the battery, the angle between the first surface and the first direction is θ, 5°≤θ≤85°.

[0012] As a further optional solution of the battery, the battery further includes a sealing member, and the sealing member is wound around the third protrusion;

[0013] The top cover sheet has a first side and a second side on both sides in the first direction, the sealing member abuts against the fourth protrusion and the first side, and the inner wall surface of the sealing member is in contact with the second surface.

[0014] As a further optional solution for the battery, the second surface is parallel to the first direction, and the thickness of the second surface along the first direction is not less than the thickness of the sealing member.

[0015] As a further optional solution of the battery, the battery further has a second direction perpendicular to the first direction, and the battery further includes a first insulating member, the first insulating member is arranged on the second side, and the first insulating member surrounds the second recessed portion;

[0016] A locking groove is provided on the second recessed portion along the second direction, and the first insulating member abuts against a groove wall of the locking groove and the sealing member.

[0017] As a further optional solution of the battery, the battery further includes a second insulating member, the second insulating member is arranged on the first side, and a groove for the fourth protrusion to be embedded is provided on a side of the second insulating member facing away from the top cover sheet;

[0018] The outer edge of the fourth protrusion is provided with a locking bevel, and the second insulating member is engaged with the locking bevel.

[0019] As a further optional solution for the battery, the battery further comprises a shell, the shell having a receiving cavity and an opening communicating with the receiving cavity, the top cover sheet being arranged to cover the opening; and

[0020] An electrode assembly is disposed in the accommodating cavity and is electrically connected to the pole.

[0021] Another object of the present invention is to provide a battery pack.

[0022] The utility model provides the following technical solutions:

[0023] A battery pack comprises the above-mentioned battery.

[0024] The embodiments of the present invention have the following beneficial effects:

[0025] In the above battery, the first protrusion, the second recess, the third protrusion and the fourth protrusion are arranged in sequence along the first direction, and the first protrusion, the second recess and the third protrusion are inserted through the pole hole on the top cover. The diameter of the first protrusion and the diameter of the third protrusion are both larger than the diameter of the second recess, and the first protrusion, the second recess and the third protrusion are enclosed to form a groove for the first insulating member to engage. The diameter of the fourth protrusion is larger than the diameter of the third protrusion, forming a limiting protrusion.

[0026] During the assembly process, the fourth protrusion and the top cover sheet are brought close to each other under the pressure of the injection mold. Since the first surface of the third protrusion connected to the second recessed portion is inclined, even if the seal is embedded in the groove, the top cover sheet can push the seal to slide along the first surface toward the second surface, guiding the seal to escape from the groove, avoiding poor assembly and ensuring the sealing of the connection between the pole and the top cover sheet.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A diagram showing a pole assembly structure in the related art is shown;

[0030] Figure 2 The overall structure diagram of a battery provided by an embodiment of the utility model is shown;

[0031] Figure 3 A schematic diagram showing the connection relationship between a pole and a top cover in a battery provided by an embodiment of the utility model is shown;

[0032] Figure 4 Shows Figure 3 Schematic diagram of the AA section;

[0033] Figure 5 Shows Figure 4 The enlarged schematic diagram of point B in the middle;

[0034] Figure 6 A schematic diagram showing the structure of a battery pole provided by an embodiment of the utility model is shown;

[0035] Figure 7 A cross-sectional schematic diagram of a battery pole provided by an embodiment of the utility model is shown;

[0036] Figure 8 Shows Figure 7 The enlarged schematic diagram at C in the middle;

[0037] Fig. 9 A schematic diagram showing the dimensions of a battery pole in an embodiment of the utility model is shown;

[0038] Fig.10 A schematic cross-sectional view of a battery pole in an embodiment of the utility model from another viewing angle is shown;

[0039] Fig.11 A top view of a battery pole provided by an embodiment of the utility model is shown.

[0040] Description of the main component symbols in the related technology:

[0041] 10a-top cover plate; 20a-pole; 30a-seal; 40a-first insulating member.

[0042] Description of the main component symbols in this application:

[0043] 100-top cover; 101-pole hole; 102-first side; 103-second side; 200-pole; 201-positioning hole; 210-first protrusion; 220-second recess; 221-locking groove; 230-third protrusion; 231-first surface; 232-second surface; 233-third surface; 240-fourth protrusion; 241-locking angle; 250-fifth step; 300-seal; 400-first insulating member; 500-second insulating member; 501-groove; 600-housing; Z-first direction; X-second direction; Y-third direction. DETAILED DESCRIPTION

[0044] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0045] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of the template herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0049] The pole assembly structure in the related art is as follows Figure 1 As shown, the pole 20a is penetrated through the top cover sheet 10a, and a limiting protrusion is provided at one end of the pole 20a close to the battery, and the limiting protrusion is supported on the top cover sheet 20a through a sealing member 30a, and a first insulating member 40a is provided at the other end of the pole 20a. The limiting protrusion and the first insulating member 40a clamp the top cover sheet 10a therein, thereby fixing the pole 20a to the top cover sheet 10a.

[0050] In order to better fix the pole 20a on the top cover sheet 10a after injection molding, a groove is generally provided on the outer side of the pole 20a so that the first insulating member 40a can be engaged with the pole 20a after injection molding, and the connection is more stable. At this time, a plurality of step portions including the bottom of the groove are formed on the outer side of the pole 20a, and the seal 30a is sleeved on the step portion of the groove near the side of the limiting protrusion. However, in the above-mentioned assembly process, the seal 30a often embeds in the groove, resulting in poor assembly, which in turn leads to insufficient sealing at the connection between the pole 20a and the top cover sheet 10a.

[0051] In order to solve the above technical problems, this embodiment provides a battery, specifically a power battery.

[0052] Please also read Figure 2 and Figure 3 The battery has a first direction Z, and the battery includes a top cover sheet 100 and a pole 200 .

[0053] Please also read Figure 4 and Figure 5 Specifically, a pole hole 101 is provided on the top cover sheet 100 , and the pole hole 101 passes through the top cover sheet 100 along the first direction Z.

[0054] Please combine Figures 6 to 9 Correspondingly, the side surface of the pole 200 is sequentially provided with a first protrusion 210, a second recess 220, a third protrusion 230 and a fourth protrusion 240 along the first direction Z, and the first protrusion 210, the second recess 220 and the third protrusion 230 are penetrated in the pole hole 101. The diameter of the first protrusion 210 is D1, the diameter of the second recess 220 is D2, the diameter of the third protrusion 230 is D3, and the diameter of the fourth protrusion 240 is D4, and D1>D2, D4>D3>D2.

[0055] The third protrusion 230 has a first surface 231 and a second surface 232 connected to each other. The first surface 231 is connected to the second recessed portion 220 and is inclined relative to the first direction Z. The second surface 232 is connected to the fourth protrusion 240 .

[0056] In the above battery, the diameter of the first protrusion 210 and the diameter of the third protrusion 230 are both larger than the diameter of the second recessed portion 220. The first protrusion 210, the second recessed portion 220 and the third protrusion 230 together form a groove 501 for the first insulating member 400 to engage. The diameter of the fourth protrusion 240 is larger than the diameter of the third protrusion 230, forming a limiting protrusion.

[0057] During the assembly process, the fourth protrusion 240 and the top cover sheet 100 are brought close to each other under the pressure of the injection mold. Since the first surface 231 of the third protrusion 230 connected to the second recessed portion 220 is inclined, even if the seal 300 is embedded in the groove 501, the top cover sheet 100 can push the seal 300 to slide along the first surface 231 toward the second surface 232, and guide the seal 300 to escape from the groove 501, avoiding poor assembly and ensuring the sealing of the connection between the pole 200 and the top cover sheet 100.

[0058] In some embodiments, the first protrusion 210 is cylindrical, and the cross section of the first protrusion 210 is circular, satisfying 10 mm ≤ D1 ≤ 40 mm.

[0059] In addition, the thickness of the first protrusion 210 along the first direction Z is H1, which satisfies 0 mm

[0060] Optionally, D1 can be a range value of any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, and 40mm, or any two of them.

[0061] At the same time, H1 can be any one of 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, and 3mm, or a range value composed of any two of them.

[0062] In some embodiments, the second recessed portion 220 is cylindrical, and the cross section of the second recessed portion 220 is circular, satisfying 10 mm ≤ D2 ≤ 40 mm.

[0063] In addition, the thickness of the second recessed portion 220 along the first direction Z is H2, satisfying 0 mm<H2≤4 mm.

[0064] Optionally, D2 can be a range value of any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, and 40mm, or any two of them.

[0065] ​At the same time, H2 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, and 4mm, any one of which or a range of any two.

[0066] In some embodiments, the third protrusion 230 is cylindrical, and the cross section of the third protrusion 230 is circular, satisfying 10 mm ≤ D3 ≤ 40 mm.

[0067] In addition, the thickness of the third protrusion 230 along the first direction Z is H3, which satisfies 0 mm<H3≤4 mm.

[0068] Optionally, D3 can be a range value of any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, and 40mm, or any two of them.

[0069] At the same time, H3 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, and 4mm, any one of which or a range value consisting of any two of them.

[0070] In some embodiments, the fourth protrusion 240 is in a rectangular parallelepiped shape, the cross section of the fourth protrusion 240 is square, and the diameter D4 of the fourth protrusion 240 refers to the length of the cross section of the fourth protrusion 240, satisfying 10mm≤D4≤60mm.

[0071] In addition, the width of the cross section of the fourth protrusion 240 is W1 (see Fig.11), satisfying 10mm≤W1≤60mm. The thickness of the fourth protrusion 240 along the first direction Z is H4, satisfying 0mm<H4≤3mm.

[0072] Optionally, D4 can be a range value of any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 52mm, 54mm, 56mm, 58mm, and 60mm, or any two of them.

[0073] At the same time, W1 can be any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 52mm, 54mm, 56mm, 58mm, and 60mm, or a range value consisting of any two of them.

[0074] At the same time, H4 can be any one of 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, and 3mm, or a range value composed of any two of them.

[0075] Further, considering that the diameter D2 of the second recessed portion 220, the diameter D3 of the third protruding portion 230, and the thickness H3 of the third protruding portion 230 are determined in advance during the design and processing of the pole 200. On this basis, the width of the first surface 231 along the radial direction of the third protruding portion 230 depends on the difference between the diameter D3 of the third protruding portion 230 and the diameter D2 of the second recessed portion 220, and the thickness of the second surface 232 along the first direction Z depends on the inclination of the first surface 231. If the angle between the first surface 231 and the first direction Z is too large, the resistance encountered by the sealing member 300 when sliding along the first surface 231 toward the second surface 232 is large, which is not conducive to the sealing member 300 coming out of the groove 501. If the angle between the first surface 231 and the first direction Z is too small, the thickness of the second surface 232 along the first direction Z is too small, which is not conducive to the contact and sealing between the sealing member 300 and the third protruding portion 230. Therefore, in some embodiments, the angle between the first surface 231 and the first direction Z is θ, which satisfies 5°≤θ≤85°.

[0076] Optionally, θ can be a range value consisting of any one of 5°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, 65°, 70°, 75°, 80°, and 85°, or any two of them.

[0077] Preferably, 30°≤θ≤60°.

[0078] In some embodiments, the third protrusion 230 further has a third surface 233 connecting the first surface 231 and the second surface 232, and the third surface 233 is located between the first surface 231 and the second surface 232. The third surface 233 is arranged in an arc shape, and the third surface 233 is tangent to the first surface 231 and the second surface 232 respectively.

[0079] When the top cover sheet 100 pushes the seal 300 to slide along the first surface 231 toward the second surface 232, due to the arc transition between the first surface 231 and the second surface 232 through the third surface 233, the seal 300 can slide from the first surface 231 to the second surface 232 more smoothly, which is conducive to the seal 300 to escape from the groove 501.

[0080] Furthermore, if the radius of the third surface 233 is too large, the thickness of the second surface 232 along the first direction Z will also be too small, which is not conducive to the contact and sealing between the seal 300 and the third protrusion 230. If the radius of the third surface 233 is too small, it is not conducive to the seal 300 sliding smoothly from the first surface 231 to the second surface 232. Therefore, in some embodiments, the radius of the third surface 233 is R1, which satisfies 0.1mm≤R1≤2mm.

[0081] Optionally, R1 can be a range value of any one of 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, and 2mm, or any two of them.

[0082] The test is as follows:

[0083] The batteries of Examples 1-6 and Comparative Examples 1-2 are subjected to the top cover helium inspection method: turn on the helium inspection machine switch, place the top cover sheet 100 and the pole 200 in the helium inspection machine fixture, and after installation, press the start button on the device to perform the helium inspection test. If the top cover helium inspection is qualified, the green light on the display screen will display "qualified" to determine that the top cover is qualified. If the top cover helium inspection is unqualified, the red light on the display screen will display "unqualified" to determine that the top cover is unqualified. After the equipment completes the inspection, it will automatically determine the defective position, and record the data and position at this time. Refer to Table 1.

[0084] Table 1

[0085]

[0086] According to the above data, it can be seen that the seal 300 is pressed into place by the injection molding structure and the guiding effect of the first surface 231. When 0.1mm≤R1≤2mm, the guiding effect of R1 presses the seal 300 into place to ensure the airtightness of the top cover. If R1 is too small, the first surface 231 cannot play a guiding role. If R1 is too large, the contact area between the second surface 232 and the sealing ring is insufficient, resulting in poor airtightness.

[0087] The battery of Examples 1-6 and Comparative Examples 1-2 was subjected to a pole torsion test method: the torque tester switch was turned on, the top cover was placed in the torque tester fixture, the test torque was set, and the start button on the device was pressed to perform the torque test. After the test was completed, a helium test was performed. If the helium test passed and the upper plastic appearance was not damaged, the torsion test was qualified. Refer to Table 2.

[0088] Table 2

[0089]

[0090] According to the above data, it can be seen that if θ is too small, the contact area between the groove wall of the locking groove 221 and the first insulating member 400 is reduced, and the torque test fails. If θ is too large, the first surface 231 cannot play a guiding role.

[0091] In some embodiments, the width of the first surface 231 along the radial direction of the third protrusion 230 is W2, satisfying 0.1 mm≤W2≤3 mm. The thickness of the first surface 231 along the first direction Z is H5, satisfying 0.1 mm≤H5≤3 mm.

[0092] Optionally, W2 can be any one of 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, and 3mm, or a range value consisting of any two of them.

[0093] At the same time, H5 can be any one of 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, and 3mm, or a range value composed of any two of them.

[0094] In some embodiments, a fifth step portion 250 is further disposed on the side of the pole 200. The fifth step portion 250 is disposed in a cylindrical shape and is located on a side of the first protrusion 210 along the first direction Z facing away from the second recess 220.

[0095] The diameter of the fifth step portion 250 is D5, and D5<D1, satisfying 10 mm≤D5≤40 mm. The thickness of the fifth step portion 250 along the first direction Z is H6, satisfying 0 mm<H6≤1 mm.

[0096] Optionally, D5 can be a range value of any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, and 40mm, or any two of them.

[0097] At the same time, H6 can be any one of 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, or a range value consisting of any two of them.

[0098] In some embodiments, a positioning hole 201 is disposed at one end of the pole 200 along the first direction Z, and the positioning hole 201 is disposed on the fifth step portion 250 and the first protrusion 210 .

[0099] The positioning hole 201 is a conical hole, and the diameter of the positioning hole 201 is D6, which satisfies 0mm<D6≤6mm. The depth of the positioning hole 201 is H7, which satisfies 0mm<H7≤5mm.

[0100] Optionally, D6 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 The range value consists of any one of m, 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, 5mm, 5.1mm, 5.2mm, 5.3mm, 5.4mm, 5.5mm, 5.6mm, 5.7mm, 5.8mm, 5.9mm, and 6mm, or any two of them.

[0101] At the same time, H7 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 The range value consists of any one of m, 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, and 5mm, or any two of them.

[0102] In some embodiments, the battery further includes a sealing member 300 , and the sealing member 300 is disposed around the third protrusion 230 .

[0103] Correspondingly, the top cover sheet 100 has a first side 102 and a second side 103 on both sides in the first direction Z. The sealing member 300 abuts against the fourth protrusion 240 and the first side 102 , and the inner wall surface of the sealing member 300 is in contact with the second surface 232 .

[0104] During the assembly process, the fourth protrusion 240 and the top cover sheet 100 are brought closer to each other under the pressure of the injection mold, and the top cover sheet 100 pushes the seal 300 to slide along the first surface 231 toward the second surface 232 until the seal 300 is wound around the second surface 232 of the third protrusion 230, and the inner wall surface of the seal 300 is in contact with the second surface 232. Subsequently, the fourth protrusion 240 and the top cover sheet 100 continue to move closer until the seal 300 abuts against the fourth protrusion 240 and the first side 102 respectively, and is in close contact with the fourth protrusion 240, and is in close contact with the first side 102, thereby sealing the connection between the pole 200 and the top cover sheet 100.

[0105] Further, the second surface 232 is parallel to the first direction Z, and the thickness of the second surface 232 along the first direction Z is not less than the thickness of the sealing member 300 .

[0106] At this time, the inner wall surface of the sealing member 300 can be completely in contact with the second surface 232 , and there is no gap between the sealing member 300 and the pole 200 , so the sealing effect is better.

[0107] In some embodiments, the battery further has a second direction X perpendicular to the first direction Z. In addition, the battery further includes a first insulating member 400 , which is disposed on the second side 103 and surrounds the second recessed portion 220 .

[0108] Specifically, during the assembly process, the fourth protrusion 240 and the top cover sheet 100 are brought closer to each other under the pressure of the injection mold until the fourth protrusion 240 directly or indirectly abuts against the first side 102 of the top cover sheet 100. Subsequently, the second side 103 of the top cover sheet 100 is injection molded around the pole 200, and the first insulating member 400 is solidified to form the first insulating member 400, and the first insulating member 400 surrounds the second recessed portion 220 and engages with the groove 501 formed by the first protrusion 210, the second recessed portion 220 and the third protrusion 230.

[0109] At this time, the first insulating member 400 and the pole 200 remain relatively fixed along the first direction Z, and the first insulating member 400 cooperates with the fourth protrusion 240 to clamp the top cover sheet 100 therein, thereby fixing the pole 200 and the top cover sheet 100 .

[0110] In some embodiments, the first insulating member 400 is flush with the connection between the first protrusion 210 and the fifth step portion 250 along the first direction Z and the side facing away from the top cover sheet 100 . The first insulating member 400 wraps the first protrusion 210 inside, and the fifth step portion 250 is exposed outside.

[0111] On this basis, in order to prevent the first insulating member 400 and the pole 200 from loosening and rotating relative to each other, a locking groove 221 is provided on the second recessed portion 220 along the second direction X, and the first insulating member 400 abuts against the groove wall and the sealing member 300 of the locking groove 221, so that the first insulating member 400 and the pole 200 remain relatively fixed around the first direction Z.

[0112] In some embodiments, the width of the pole 200 at the locking groove 221 is W3 (see Fig.10 ), satisfying 10mm≤W3≤40mm.

[0113] The width of the pole 200 at the locking groove 221 refers to the maximum dimension of the pole 200 along the second direction X at the locking groove 221 .

[0114] Optionally, W3 can be a range value of any one of 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, and 40mm, or any two of them.

[0115] In some embodiments, the battery further includes a second insulating member 500 , and the second insulating member 500 is disposed on the first side 102 .

[0116] For example, one of the top cover sheet 100 and the second insulating member 500 is provided with a limiting hole, and the other is provided with a connecting member embedded in the limiting hole. During the assembly process, the top cover sheet 100 and the second insulating member 500 are fitted to each other, and the connecting member is embedded in the limiting hole, so that the top cover sheet 100 and the second insulating member 500 are fixedly connected.

[0117] In addition, a groove 501 is provided on the side of the second insulating member 500 facing away from the top cover sheet 100, into which the fourth protrusion 240 can be embedded, and a rivet hole is provided at the bottom of the groove 501, and the pole 200 is riveted through the rivet hole. During the assembly process, the fourth protrusion 240 and the top cover sheet 100 are moved closer to each other under the pressure of the injection mold until the fourth protrusion 240 is embedded in the groove 501, and indirectly abuts against the first side 102 of the top cover sheet 100 through the second insulating member 500. Correspondingly, the third protrusion 230 passes through the rivet hole and penetrates into the pole hole 101.

[0118] In some embodiments, two pole holes 101 are sequentially provided on the top cover sheet 100 along the second direction X, and correspondingly, two rivet holes are sequentially provided on the second insulating member 500 along the second direction X. It should be noted that the second insulating member 500 may be an integrated structure or a split structure. In this embodiment, the second insulating member 500 is a split structure, that is, the second insulating member 500 is divided into two parts corresponding to the two poles 200, and each part of the second insulating member 500 is riveted to a pole 200.

[0119] See also Fig.11 On this basis, in order to prevent the second insulating member 500 and the pole 200 from loosening and rotating relative to each other, a locking bevel 241 is provided on the outer edge of the fourth protrusion 240, and the second insulating member 500 is engaged with the locking bevel 241, so that the second insulating member 500 and the pole 200 remain relatively fixed around the first direction Z.

[0120] In some embodiments, the battery further has a third direction Y that is perpendicular to both the first direction Z and the second direction X. The locking bevel 241 is disposed at a vertex of the fourth protrusion 240, the width of the locking bevel 241 along the second direction X is W4, satisfying 1mm≤W4≤10mm, and the width of the locking bevel 241 along the third direction Y is W5, satisfying 1mm≤W5≤10mm.

[0121] Optionally, W4 can be a range value of any one of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm, or any two of them.

[0122] At the same time, W5 can be any one of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm, or a range value consisting of any two of them.

[0123] In addition, the remaining three corners of the fourth protrusion 240 are all rounded, and the radius of the rounded corner is R2, satisfying 0mm<R2≤10mm.

[0124] Optionally, R2 can be a range value of any one of 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, and 10mm, or any two of them.

[0125] Furthermore, both ends of the locking bevel 241 are rounded, and the fillet radius is R3, satisfying 0mm<R3≤2mm.

[0126] Optionally, R3 can be a range value of any one of 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, and 2mm, or any two of them.

[0127] Please refer again Figure 3 and Figure 4 In some embodiments, the thickness of the top cover sheet 100 along the first direction Z is H8, satisfying 1mm<H8<3mm. The width of the top cover sheet 100 along the second direction X is W6, satisfying 100mm<W6<650mm. The width of the top cover sheet 100 along the third direction Y is W7, satisfying 10mm<W7<100mm.

[0128] In addition, 0.0153<W7 / W6<1.

[0129] Optionally, H8 can be a range value of any one of 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, and 2.9mm, or any two of them.

[0130] At the same time, W6 can be 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 210mm, 220mm, 230mm, 240mm, 250mm, 260mm, 270mm, 280mm, 290mm, 300mm, 310mm, 320mm, 330mm, 340mm, 350mm, 360mm, 370mm, 380mm , 390mm, 400mm, 410mm, 420mm, 430mm, 440mm, 450mm, 460mm, 470mm, 480mm, 490mm, 500mm, 510mm, 520mm, 530mm, 540mm, 550mm, 560mm, 570mm, 580mm, 590mm, 600mm, 610mm, 620mm, 630mm, and 640mm, a range value consisting of any one or any two of them.

[0131] At the same time, W7 can be any one of 15mm, 20mm, 25mm, 30mm, 35mm, 40mm, 45mm, 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, and 95mm, or a range value composed of any two of them.

[0132] Preferably, 1.4 mm ≤ H8 ≤ 2.6 mm.

[0133] In some embodiments, the battery further includes a housing 600 and an electrode assembly.

[0134] The housing 600 has a receiving cavity and an opening communicating with the receiving cavity, and the top cover sheet 100 is disposed on the opening. The electrode assembly is disposed in the receiving cavity, and the electrode assembly is electrically connected to the pole 200 .

[0135] In summary, the above-mentioned battery is provided with an inclined first surface 231 on the third protrusion 230 of the pole 200, and at the same time an arc-shaped third surface 233 is provided to make an arc transition between the first surface 231 and the second surface 232, so that the top cover sheet 100 can push the seal 300 to slide along the first surface 231 toward the second surface 232 during the process of approaching each other with the fourth protrusion 240, and guide the seal 300 to escape from the groove 501 formed by the first protrusion 210, the second recessed portion 220 and the third protrusion 230, thereby avoiding poor assembly and ensuring the sealing of the connection between the pole 200 and the top cover sheet 100.

[0136] In order to verify the improvement effect of this embodiment on the hanging platform of the seal 300 in the groove 501, a special sample is made to hang the seal 300 in the groove 501, and the seal 300 is pressed into place by the injection molding structure and the guiding effect of the first surface 231. This embodiment can press the seal 300 back into place 100% for the special sample of the hanging platform, thereby preventing the poor assembly of the pole 200 caused by the hanging platform of the seal 300 and avoiding air leakage of the pole 200.

[0137] The surface of the third protrusion 230 is set to an arc surface. When the surface of the third protrusion 230 is set to an arc surface, it can be pressed back into place by 77.8%, which means that the arc surface can play a certain guiding role, but it cannot completely prevent the poor assembly of the pole 200 caused by the hanging platform of the seal 300, and there is still the possibility of leakage of the pole 200.

[0138] This embodiment also provides a battery pack, including the above-mentioned battery.

[0139] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not as limiting, and thus other examples of the exemplary embodiments may have different values.

[0140] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0141] The above-mentioned embodiments only express several implementation methods of the present invention, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A battery, characterized in that: The battery has a first direction (Z), the battery comprising: A top cover sheet (100), wherein a pole hole (101) is provided through the top cover sheet (100) along the first direction (Z); and A pole (200), the pole (200) comprising a first protruding portion (210), a second recessed portion (220), a third protruding portion (230) and a fourth protruding portion (240) connected in sequence along the first direction (Z), the first protruding portion (210), the second recessed portion (220) and the third protruding portion (230) being arranged through the pole hole (101), the diameter of the first protruding portion (210) being D1, the diameter of the second recessed portion (220) being D2, the diameter of the third protruding portion (230) being D3, the diameter of the fourth protruding portion (240) being D4, and D1>D2, D4>D3>D2; Wherein, the third protrusion (230) has a first surface (231) and a second surface (232) connected to each other, the first surface (231) is connected to the second recessed portion (220), the first surface (231) is inclined relative to the first direction (Z), and the second surface (232) is connected to the fourth protrusion (240).

2. The battery according to claim 1, characterized in that The third protrusion (230) further comprises a third surface (233) connecting the first surface (231) and the second surface (232); the third surface (233) is located between the first surface (231) and the second surface (232); the third surface (233) is arranged in an arc shape; and the third surface (233) is tangent to the first surface (231) and the second surface (232), respectively.

3. The battery according to claim 2, characterized in that The radius of the third surface (233) is R1, 0.1 mm ≤ R1 ≤ 2 mm.

4. The battery according to claim 1, characterized in that The angle between the first surface (231) and the first direction (Z) is θ, 5°≤θ≤85°.

5. The battery according to any one of claims 1 to 4, characterized in that The battery further comprises a sealing member (300), wherein the sealing member (300) is wound around the third protruding portion (230); The top cover sheet (100) has a first side (102) and a second side (103) on both sides in the first direction (Z), the sealing member (300) abuts against the fourth protruding portion (240) and the first side (102), and the inner wall surface of the sealing member (300) is in contact with the second surface (232).

6. The battery according to claim 5, characterized in that The second surface (232) is parallel to the first direction (Z), and the thickness of the second surface (232) along the first direction (Z) is not less than the thickness of the sealing member (300).

7. The battery according to claim 5, characterized in that The battery also has a second direction (X) perpendicular to the first direction (Z), and the battery also includes a first insulating member (400), the first insulating member (400) is arranged on the second side (103), and the first insulating member (400) surrounds the second recessed portion (220); A locking groove (221) is provided on the second recessed portion (220) along the second direction (X), and the first insulating member (400) abuts against a groove wall of the locking groove (221) and the sealing member (300).

8. The battery according to claim 5, characterized in that The battery further comprises a second insulating member (500), the second insulating member (500) being arranged on the first side (102), and a groove (501) for the fourth protrusion (240) to be embedded is provided on a side of the second insulating member (500) facing away from the top cover sheet (100); The outer edge of the fourth protrusion (240) is provided with a locking bevel (241), and the second insulating member (500) is engaged with the locking bevel (241).

9. The battery according to any one of claims 1 to 4, characterized in that The battery further comprises a housing (600), the housing (600) having a receiving cavity and an opening communicating with the receiving cavity, the top cover sheet (100) covering the opening; and An electrode assembly is arranged in the accommodating cavity, and the electrode assembly is electrically connected to the pole (200).

10. A battery pack, characterized in that: A battery comprising the battery according to any one of claims 1 to 9.

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