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 height direction and comprises a top cover, a pole, a fixing piece and a sealing assembly, a pole hole penetrates through the top cover along the height direction; the pole is arranged in the pole hole in a penetrating manner; the fixing piece is arranged on the side, facing the electrode assembly, of the top cover, the fixing piece surrounds the pole, and the fixing piece and the top cover form an installation space in the height direction and clamp the pole; the sealing assembly surrounds the pole and comprises a limiting piece and a sealing piece, at least one part of the limiting piece is located in the mounting space, the sealing piece is connected with the limiting piece, and the limiting piece abuts against the fixing piece and the pole so that the sealing piece can deform in the height direction and has elasticity on the fixing piece and the pole. When the stress on the sealing assembly is increased, the limiting piece can share part of pressure, so that the pressure increased on the sealing piece is less, the increase amplitude of the compression amount of the sealing piece is smaller, the compression performance of the sealing piece is not easy to weaken, and the sealing effect 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] The sealing method adopted by existing batteries is to compress the sealing ring, and control the compression amount of the sealing ring within a reasonable range, so as to utilize the rebound force of the sealing ring to ensure the sealing of the battery.

[0003] After assembly, the seal is continuously stressed in the vertical direction, and the amount of compression of the seal varies with the external stress. Throughout the battery's life cycle, the repeated stress on the seal will cause the compression performance to weaken, leading to battery seal failure in extreme cases. Utility Model Content

[0004] In order to solve the problem in the prior art that the compression amount of the sealing ring changes due to repeated force, resulting in weakened compression performance, one of the purposes of the present utility model is to provide a battery.

[0005] The utility model provides the following technical solutions:

[0006] A battery having a height direction, comprising:

[0007] A top cover, wherein a pole hole is provided through the top cover along the height direction;

[0008] A pole, which is inserted into the pole hole and is used to be electrically connected to the electrode assembly;

[0009] A fixing member, the fixing member being arranged on a side of the top cover facing the electrode assembly, and the fixing member surrounding the electrode post, the fixing member and the top cover forming an installation space in the height direction and clamping the electrode post; and

[0010] A sealing assembly surrounds the pole, the sealing assembly including a limiter and a sealing member, at least a portion of the limiter is located within the installation space, the sealing member is connected to the limiter, and the limiter abuts against the fixing member and the pole so that the sealing member deforms along the height direction and is elastic to the fixing member and the pole.

[0011] As a further optional solution for the battery, the electrode includes a first column portion, a second column portion, and a third column portion sequentially connected in the height direction, the second column portion is at least partially located within the installation space, and a side of the third column portion facing away from the first column portion is used for electrical connection to the electrode assembly;

[0012] The fixing member includes a first fixing portion and a second fixing portion connected in sequence, the first fixing portion is connected to a side of the top cover facing the electrode assembly, the second fixing portion is arranged around the third column portion, and the second fixing portion, the first fixing portion and the top cover form the installation space;

[0013] At least a portion of the limiting member is located between the second fixing portion and the second column portion.

[0014] As a further optional solution for the battery, the sealing member includes a first sealing portion and a second sealing portion connected to each other, the first sealing portion abuts the second fixing portion and the second column portion, and the second sealing portion abuts the first fixing portion and the second column portion.

[0015] As a further optional solution for the battery, the limiting member includes a first limiting portion and a second limiting portion connected to each other, the first limiting portion is located between the second fixing portion and the second column portion, and the second limiting portion is located between the second fixing portion and the third column portion.

[0016] As a further optional solution for the battery, a material clearance gap is provided on a side of the first sealing portion away from the second column portion, and the material clearance gap is recessed in a direction away from the second fixing portion.

[0017] As a further optional solution for the battery, the seal includes a first seal and a second seal connected along the height direction, the first seal is arranged around the third column portion, the second seal is arranged around the second column portion, and the limiting member is passed through the first seal.

[0018] As a further optional solution for the battery, a side surface of the limiting member facing the second column portion is lower than a side surface of the first sealing member facing the second column portion;

[0019] Alternatively, a surface of the limiting member facing away from the second column portion is higher than a surface of the first sealing member facing away from the second column portion.

[0020] As a further optional solution for the battery, the battery further includes a first insulating member, which is arranged around the first column portion and abuts against the top cover and the first column portion.

[0021] As a further optional solution for the battery, the elastic modulus of the limiting member is greater than the elastic modulus of the sealing member, the height of the limiting member located between the fixing member and the pole in the height direction is H1, the natural height of the sealing member located between the fixing member and the pole along the height direction is H2, and H1<H2.

[0022] Another object of the present invention is to provide a battery pack.

[0023] The utility model provides the following technical solutions:

[0024] A battery pack includes the above-mentioned battery.

[0025] The embodiments of the present utility model have the following beneficial effects:

[0026] In the above-mentioned battery, the fixing member and the top cover form an installation space in the height direction and clamp the pole, and at least a portion of the limiter in the sealing assembly is located in the installation space. During the assembly process, the sealing member is compressed in the height direction, causing the sealing member to deform in the height direction until the limiter abuts the fixing member and the pole, and the elasticity of the compressed sealing member against the fixing member and the pole is used to ensure the sealing of the battery. Throughout the life cycle of the battery, when the pole and the fixing member tend to move closer to each other under the action of external force, resulting in an increase in the force on the sealing assembly, the limiter abuts the fixing member and the pole, so the limiter can share part of the pressure, so that the pressure added to the seal is less, thereby reducing the increase in the compression of the seal, and further reducing the compression performance of the seal, thereby ensuring the sealing effect.

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, 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 present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention 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 any creative work.

[0029] Figure 1 The figure shows a schematic diagram of the overall structure of a battery provided by an embodiment of the present utility model;

[0030] Figure 2 A schematic diagram of a partial explosion of a battery provided by an embodiment of the present utility model is shown;

[0031] Figure 3 A partial cross-sectional schematic diagram of a battery provided by an embodiment of the present utility model is shown;

[0032] Figure 4 Shown Figure 3 A in the middle is an enlarged schematic diagram;

[0033] Figure 5A schematic structural diagram of a sealing assembly in a battery provided by an embodiment of the present utility model is shown;

[0034] Figure 6 A cross-sectional schematic diagram of a sealing assembly in a battery provided by an embodiment of the present utility model is shown;

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

[0036] Figure 8 A schematic structural diagram of a sealing assembly in a battery provided by another embodiment of the present utility model is shown;

[0037] Figure 9 A schematic structural diagram of a sealing assembly in a battery provided by another embodiment of the present utility model is shown.

[0038] Description of main component symbols:

[0039] 100-top cover; 110-pole hole; 200-fixing part; 210-installation space; 220-first fixing part; 230-second fixing part; 240-third fixing part; 300-pole; 310-first column; 320-second column; 330-third column; 400-sealing assembly; 410-limiting part; 411-first limiting part; 412-second limiting part; 420-sealing part; 420a-material discharge gap; 421-first sealing part; 422-second sealing part; 423-first sealing part; 424-second sealing part; 500-first insulating part; 510-first insulating part; 520-second insulating part; 600-second insulating part; 700-shell; 710-accommodating chamber; 800-electrode assembly; Z-height direction. DETAILED DESCRIPTION

[0040] The following describes embodiments of the present invention in detail. 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0041] 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 an intermediate 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 an intermediate element. Conversely, 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.

[0042] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0045] Example

[0046] Please also refer to Figure 1 、 Figure 2 and Figure 3 This embodiment provides a battery having a height direction Z. The battery includes a top cover 100 , a pole 300 , a fixing member 200 and a sealing assembly 400 .

[0047] The top cover 100 is provided with a pole hole 110 along the height direction Z. The pole 300 is passed through the pole hole 110 and is used to electrically connect to the electrode assembly 800 .

[0048] Please combine Figure 4 The fixing member 200 is arranged on the side of the top cover 100 facing the electrode assembly 800, and the fixing member 200 surrounds the pole 300. The fixing member 200 and the top cover 100 form an installation space 210 in the height direction Z and clamp the pole 300.

[0049] The sealing assembly 400 surrounds the pole 300 and includes a stopper 410 and a seal 420. At least a portion of the stopper 410 is located within the mounting space 210, and the seal 420 is connected to the stopper 410. Furthermore, the stopper 410 abuts against the fixing member 200 and the pole 300, allowing the seal 420 to deform in a Z-shape along the height direction. The seal 420 is also resilient relative to the fixing member 200 and the pole 300.

[0050] In the above-described battery, the fixing member 200 and the top cover 100 form an installation space 210 in the height direction Z and clamp the terminal 300. At least a portion of the limiting member 410 in the sealing assembly 400 is located within the installation space 210. During assembly, the sealing member 420 is compressed along the height direction Z, causing the sealing member 420 to deform in the height direction until the limiting member 410 abuts the fixing member 200 and the terminal 300. The elasticity of the compressed sealing member 420 against the fixing member 200 and the terminal 300 ensures the sealing of the battery. During the entire life cycle of the battery, when the pole 300 and the fixing part 200 tend to move closer to each other under the action of external force, resulting in an increase in the force on the sealing assembly 400, the limiting part 410 abuts against the fixing part 200 and the pole 300. Therefore, the limiting part 410 can share part of the pressure, so that the pressure added on the sealing part 420 is less, thereby making the increase in the compression amount of the sealing part 420 smaller, and further making the compression performance of the sealing part 420 less likely to weaken, thereby ensuring the sealing effect.

[0051] Please refer again Figure 1 In some embodiments, the battery further includes a shell 700 and an electrode assembly 800 .

[0052] The housing 700 has a housing cavity 710 disposed therein, and the electrode assembly 800 is disposed therein. Furthermore, the housing cavity 710 has an opening. The top cover 100 covers the opening and is connected to the housing 700.

[0053] by Figure 1 Taking the perspective shown as an example, the opening is located at the top of the accommodating cavity 710, and the top cover 100 is covered on the opening from top to bottom.

[0054] Please also refer to Figure 5 、 Figure 6 and Figure 7 In some embodiments, the elastic modulus of the limiting member 410 is greater than the elastic modulus of the sealing member 420 .

[0055] It is understood that after assembly, the seal 420 and the retaining member 410 both abut against the fixing member 200 and the pole 300. When the pole 300 and the fixing member 200 tend to move closer together under the action of an external force, causing the force on the sealing assembly 400 to increase, the seal 420 and the retaining member 410 are squeezed and deformed together, and the deformation of the seal 420 and the retaining member 410 is the same. On this basis, because the elastic modulus of the retaining member 410 is greater than that of the seal 420, the retaining member 410 can share more than half of the pressure, the compression performance of the seal 420 is less likely to be weakened, and the seal is less likely to fail.

[0056] Preferably, the stopper 410 is made of an incompressible material or has a high elastic modulus. When external force acts on the seal 420 and the stopper 410 through the pole 300, the fixing member 200, and other structures, the stopper 410 is not easily deformed, thereby preventing the seal 420 from being further compressed, thereby protecting the seal 420 and improving its reliability.

[0057] For example, the material of the limiting member 410 is an insulating material that does not react with the electrolyte, such as ceramic, PPS (polyphenylene sulfide) or PET (polyethylene glycol terephthalate).

[0058] Furthermore, the limiter 410 located between the fixing member 200 and the terminal 300 has a height H1 along the height direction Z, and the seal 420 located between the fixing member 200 and the terminal 300 has a natural height H2 along the height direction Z. The natural height refers to the height of the seal 420 when it is undeformed, i.e., it has no elasticity with respect to the fixing member 200 and the terminal 300. Furthermore, H1 and H2 must satisfy the relationship H1 < H2.

[0059] Since the height of the sealing member 420 when not deformed is greater than the height of the limiting member 410 , during the assembly process, the sealing member 420 is compressed before the limiting member 410 until the limiting member 410 abuts against the fixing member 200 and the pole 300 .

[0060] It is understood that after assembly, the compressed height of seal 420 is equal to the difference between the undeformed height of seal 420 and the height of stopper 410, i.e., H2 - H1. Thus, stopper 410 can also prevent seal 420 from being over-pressurized during assembly and control the lower limit of compression of seal 420.

[0061] Please refer again Figure 4In some embodiments, the electrode 300 includes a first column portion 310, a second column portion 320, and a third column portion 330 that are sequentially connected in the height direction Z. The first column portion 310, the second column portion 320, and the third column portion 330 are all disposed within the electrode hole 110, the second column portion 320 is at least partially located within the installation space 210, and the side of the third column portion 330 facing away from the first column portion 310 is used for electrical connection with the electrode assembly.

[0062] Furthermore, the fixing member 200 includes a first fixing portion 220 and a second fixing portion 230 connected in sequence. The first fixing portion 220 is connected to the side of the top cover 100 facing the electrode assembly 800, and the second fixing portion 230 is arranged around the third column portion 330. The second fixing portion 230, the first fixing portion 220, and the top cover 100 form an installation space 210.

[0063] Accordingly, at least a portion of the limiting member 410 is located between the second fixing portion 230 and the second column portion 320 .

[0064] Specifically, the first column portion 310, the second column portion 320 and the third column portion 330 are sequentially connected and integrally formed. Figure 4 Taking the perspective shown as an example, the first column portion 310 is located above the second column portion 320 , and the third column portion 330 is located below the second column portion 320 .

[0065] In addition, the first column portion 310, the second column portion 320 and the third column portion 330 are all cylindrically arranged, the pole hole 110 is a circular hole, and the axis of the first column portion 310, the axis of the second column portion 320, the axis of the third column portion 330 and the axis of the pole hole 110 coincide with each other. The diameter of the first column portion 310 is not larger than the inner diameter of the pole hole 110. During assembly, the first column portion 310 is inserted into the pole hole 110. The diameter of the second column portion 320 is larger than the diameter of the first column portion 310 and the diameter of the third column portion 330, respectively. In the radial direction, the portion of the second column portion 320 protruding from the first column portion 310 and the third column portion 330 is located within the installation space 210. The third column portion 330 is electrically connected to the electrode assembly 800, specifically, it is welded and fixed to the tab on the electrode assembly 800.

[0066] Specifically, the first fixing portion 220 is cylindrical, and the second fixing portion 230 is annular. The axes of the first fixing portion 220 and the second fixing portion 230 also coincide with the axes of the first column 310, the second column 320, the third column 330, and the terminal hole 110. The inner diameter of the first fixing portion 220 is not less than the diameter of the second column 320, and the inner diameter of the second fixing portion 230 is not less than the diameter of the third column 330.

[0067] In addition, one end of the first fixing portion 220 along the height direction Z is connected to the side of the top cover 100 facing the electrode assembly 800, and the other end of the first fixing portion 220 along the height direction Z is connected to the outer edge of the second fixing portion 230. After assembly, the first fixing portion 220 surrounds the periphery of the second column portion 320, and also surrounds a portion of the first column portion 310 and a portion of the third column portion 330. The second fixing portion 230 surrounds the periphery of the third column portion 330. Along the height direction Z, the top cover 100, the second column portion 320, and the second fixing portion 230 are arranged in sequence.

[0068] Furthermore, the fixing member 200 further includes a third fixing portion 240 connected to the side of the top cover 100 facing the electrode assembly 800. The third fixing portion 240 is annular, and the axis of the third fixing portion 240 coincides with the axes of the first fixing portion 220 and the second fixing portion 230.

[0069] On this basis, one end of the first fixing portion 220 along the height direction Z is connected to the inner edge of the third fixing portion 240 , and further connected to the top cover 100 through the third fixing portion 240 .

[0070] It can be understood that the contact area between the annular third fixing portion 240 and the top cover 100 is larger, which is conducive to the entire fixing member 200 being assembled with the top cover 100 more stably.

[0071] Optionally, a groove is provided on a side of the top cover 100 facing the electrode assembly 800. The groove is provided around the electrode hole 110, and the third fixing portion 240 is embedded in the groove.

[0072] In some embodiments, the battery further includes a first insulating member 500 . The first insulating member 500 is disposed around the first column portion 310 , and the first insulating member 500 abuts against the top cover 100 and the first column portion 310 .

[0073] The diameter of the first column portion 310 is smaller than the inner diameter of the pole hole 110. The first insulating member 500 is located between the first column portion 310 and the wall of the pole hole 110, abutting the first column portion 310 inwardly and the top cover 100 outwardly.

[0074] During assembly, the first insulating member 500 is first placed over the first column 310, and then both the first column 310 and the first insulating member 500 are inserted into the terminal hole 110. After assembly, the first column 310 is secured within the terminal hole 110 by the first insulating member 500, maintaining insulation between the first column 310 and the top cover 100.

[0075] Specifically, the first insulating member 500 is composed of a first insulating portion 510 and a second insulating portion 520 .

[0076] The first insulating portion 510 is cylindrical, and the second insulating portion 520 is annular. The axis of the first insulating portion 510 and the axis of the second insulating portion 520 also coincide with the axis of the first column portion 310 , the second column portion 320 , the third column portion 330 and the pole hole 110 .

[0077] The inner sidewall of the first insulating portion 510 abuts against the sidewall of the first column portion 310 , and the outer sidewall of the first insulating portion 510 abuts against the hole wall of the pole hole 110 .

[0078] Furthermore, the top cover 100 , the second insulating portion 520 , and the second column portion 320 are sequentially arranged along the height direction Z. The second insulating portion 520 abuts against the top cover 100 and the second column portion 320 to maintain insulation between the top cover 100 and the second column portion 320 .

[0079] In some embodiments, the battery further includes a second insulating member 600. The second insulating member 600 is disposed on the side of the top cover 100 facing the electrode assembly 800 and is connected to the top cover 100. Furthermore, the second insulating member 600 encloses the fixing member 200 and exposes the side of the third column 330 facing the electrode assembly 800, thereby facilitating connection between the third column 330 and the electrode assembly 800.

[0080] During assembly, first assemble the first insulating member 500, the pole 300 and the sealing assembly 400 together, then insert the first column portion 310 and the first insulating member 500 into the pole hole 110 together, then assemble the fixing member 200, and weld the third fixing portion 240 of the fixing member 200 to the top cover 100, and finally assemble the second insulating member 600.

[0081] During the assembly of the fixing member 200, the fixing member 200 applies a clamping force to the pole 300 through the sealing assembly 400, compressing the sealing member 420. After the fixing member 200 and the top cover 100 are welded and fixed, the sealing member 420 maintains a certain amount of compression to achieve a sealing effect.

[0082] Please also refer to Figure 4 and Figure 7 In this embodiment, the sealing member 420 includes a first sealing portion 421 and a second sealing portion 422 connected to each other. The first sealing portion 421 abuts against the second fixing portion 230 and the second column portion 320 , and the second sealing portion 422 abuts against the first fixing portion 220 and the second column portion 320 .

[0083] Specifically, the first sealing portion 421 is annular in shape. The first sealing portion 421 surrounds the periphery of the third column 330 without contacting the third column 330. Along the height direction Z, the second column 320, the first sealing portion 421, and the second fixing portion 230 are arranged in sequence, with the first sealing portion 421 abutting the second column 320 and the second fixing portion 230.

[0084] The second sealing portion 422 is cylindrical and surrounds the outer periphery of the second column portion 320. The second sealing portion 422 abuts against the second column portion 320 inwardly and abuts against the first fixing portion 220 outwardly.

[0085] It is understood that the seal 420 located between the fixing member 200 and the pole 300 specifically refers to the first seal 421 located between the second fixing portion 230 and the second pole portion 320, and the height of the seal 420 along the height direction Z when undeformed specifically refers to the height of the first seal 421 along the height direction Z when undeformed. The limiter 410 is used to control the lower compression limit of the first seal 421 to protect the first seal 421.

[0086] In addition, the second sealing portion 422 is provided on the basis of the first sealing portion 421 , which can further enhance the sealing effect between the pole 300 and the fixing member 200 .

[0087] Furthermore, a material removal notch 420 a is provided on a side of the first sealing portion 421 away from the second column portion 320 , and the material removal notch 420 a is recessed in a direction away from the second fixing portion 230 .

[0088] During the assembly process, the material gap 420a can accommodate the compressed material when the seal 420 is compressed, ensuring that the seal 420 is compressed and deformed smoothly, so that the seal 420 and the pole 300, and the seal 420 and the fixing member 200 can fit tightly, with sufficient sealing effect.

[0089] Specifically, the material discharge notch 420 a is disposed on an outer edge of the first sealing portion 421 facing away from the second column portion 320 .

[0090] In this embodiment, the limiting member 410 includes a first limiting portion 411 and a second limiting portion 412. The first limiting portion 411 is located between the second fixing portion 230 and the second column 320, and the second limiting portion 412 is located between the second fixing portion 230 and the third column 330.

[0091] Specifically, the first limiting portion 411 is annular in shape. The first limiting portion 411 surrounds the periphery of the third column 330 and does not contact the third column 330. Along the height direction Z, the second column 320, the first limiting portion 411, and the second fixing portion 230 are arranged in sequence. After the first sealing portion 421 is compressed into place, the first limiting portion 411 abuts against the second column 320 and the second fixing portion 230 to prevent the first sealing portion 421 from being further compressed.

[0092] In addition, a surface of the first position-limiting portion 411 facing the second column 320 is flush with a surface of the first sealing portion 421 facing the second column 320. When the first sealing portion 421 is not deformed, a surface of the first sealing portion 421 facing away from the second column 320 is lower than a surface of the first position-limiting portion 411 facing away from the second column 320.

[0093] The second limiting portion 412 is cylindrical and surrounds the periphery of the third column portion 330 , without contacting the third column portion 330 and the second fixing portion 230 .

[0094] It can be understood that the limiter 410 located between the fixing member 200 and the pole 300 specifically refers to the first limiter 411 located between the second fixing portion 230 and the second pole portion 320, and the height of the limiter 410 along the height direction Z specifically refers to the height of the first limiter 411 along the height direction Z. The first limiter 411 is used to control the lower compression limit of the first sealing portion 421 to protect the first sealing portion 421.

[0095] Please also refer to Figure 8 and Figure 9 In another embodiment of the present application, the sealing member 420 includes a first sealing member 423 and a second sealing member 424 connected along the height direction Z. The first sealing member 423 is disposed around the third column portion 330, and the second sealing member 424 is disposed around the second column portion 320. In addition, the stopper 410 is disposed through the first sealing member 423.

[0096] During use, the first seal 423 abuts against the second column 320 and the second fixing portion 230 to seal between them. The second seal 424 abuts against the second column 320 and the first fixing portion 220 to seal between them.

[0097] Here, the height of the sealing member 420 when not deformed along the height direction Z specifically refers to the height of the first sealing member 423 when not deformed along the height direction Z. Accordingly, the limiter 410 is used to control the lower compression limit of the first sealing member 423 to protect the first sealing member 423 .

[0098] Optionally, the first sealing member 423 and the second sealing member 424 may be integrally formed. In the figure, a dotted line is used to indicate a boundary line between the first sealing member 423 and the second sealing member 424 .

[0099] Specifically, if Figure 8As shown, when the first sealing member 423 is not deformed, the surface of the side of the stopper 410 facing the second column portion 320 is lower than the surface of the side of the first sealing member 423 facing the second column portion 320. In addition, the surface of the side of the stopper 410 facing away from the second column portion 320 is always flush with the surface of the side of the first sealing member 423 facing away from the second column portion 320.

[0100] Or, as Figure 9 As shown, when the first sealing member 423 is not deformed, the surface of the side of the stopper 410 facing away from the second column portion 320 is higher than the surface of the side of the first sealing member 423 facing away from the second column portion 320. In addition, the surface of the side of the stopper 410 facing the second column portion 320 is always flush with the surface of the side of the first sealing member 423 facing the second column portion 320.

[0101] In summary, the fixing member 200 and the top cover 100 in the above-mentioned battery form an installation space 210 in the height direction Z and clamp the pole 300, and at least a portion of the limiter 410 in the sealing assembly 400 is located in the installation space 210. During the assembly process, the seal 420 is compressed along the height direction Z, causing the seal 420 to deform along the height direction until the limiter 410 abuts against the fixing member 200 and the pole 300. The elasticity of the compressed seal 420 against the fixing member 200 and the pole 300 is used to ensure the sealing of the battery. By integrating the limiter 410 on the seal 420, the limiter 410 can effectively control the compression amount of the seal 420, avoid overpressure on the seal 420 during the assembly process, and avoid repeated force on the seal 420 after assembly, so that the compression performance of the seal 420 is not easily weakened, thereby ensuring the sealing effect.

[0102] This embodiment also provides a battery pack, including the above-mentioned battery.

[0103] In all examples shown and described herein, any specific values should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0104] 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, it does not need to be further defined or explained in subsequent drawings.

[0105] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the scope of the present invention, all of which fall within the scope of protection of the present invention.

Claims

1. A battery, characterized in that: The battery has a height direction (Z), and the battery comprises: A top cover (100), wherein a pole hole (110) is provided through the top cover (100) along the height direction (Z); A pole (300) is inserted into the pole hole (110), and the pole (300) is used to be electrically connected to the electrode assembly; a fixing member (200), the fixing member (200) being arranged on a side of the top cover (100) facing the electrode assembly, and the fixing member (200) surrounding the pole (300), the fixing member (200) and the top cover (100) forming an installation space (210) in the height direction (Z) and clamping the pole (300); and A sealing assembly (400) surrounds the pole (300), the sealing assembly (400) comprising a limiting member (410) and a sealing member (420), at least a portion of the limiting member (410) being located within the installation space (210), the sealing member (420) being connected to the limiting member (410), the limiting member (410) being in contact with the fixing member (200) and the pole (300), so that the sealing member (420) is deformed along the height direction (Z) and has elasticity with respect to the fixing member (200) and the pole (300).

2. The battery according to claim 1, characterized in that The pole (300) comprises a first pole portion (310), a second pole portion (320), and a third pole portion (330) connected in sequence in the height direction (Z), wherein the second pole portion (320) is at least partially located in the installation space (210), and a side of the third pole portion (330) facing away from the first pole portion (310) is used for electrical connection with the electrode assembly; The fixing member (200) comprises a first fixing portion (220) and a second fixing portion (230) connected in sequence, wherein the first fixing portion (220) is connected to a side of the top cover (100) facing the electrode assembly, and the second fixing portion (230) is arranged around the third column portion (330), and the second fixing portion (230), the first fixing portion (220) and the top cover (100) form the installation space (210); At least a portion of the limiting member (410) is located between the second fixing portion (230) and the second column portion (320).

3. The battery according to claim 2, characterized in that The sealing member (420) includes a first sealing portion (421) and a second sealing portion (422) connected to each other, wherein the first sealing portion (421) abuts against the second fixing portion (230) and the second column portion (320), and the second sealing portion (422) abuts against the first fixing portion (220) and the second column portion (320).

4. The battery according to claim 3, characterized in that The limiting member (410) comprises a first limiting portion (411) and a second limiting portion (412) connected to each other, wherein the first limiting portion (411) is located between the second fixing portion (230) and the second column portion (320), and the second limiting portion (412) is located between the second fixing portion (230) and the third column portion (330).

5. The battery according to claim 3, characterized in that A material removal notch (420a) is provided on a side of the first sealing portion (421) away from the second column portion (320), and the material removal notch (420a) is recessed in a direction away from the second fixing portion (230).

6. The battery according to claim 2, characterized in that The sealing member (420) includes a first sealing member (423) and a second sealing member (424) connected along the height direction (Z), the first sealing member (423) is arranged around the third column portion (330), the second sealing member (424) is arranged around the second column portion (320), and the limiting member (410) is passed through the first sealing member (423).

7. The battery according to claim 6, characterized in that A side surface of the limiting member (410) facing the second column portion (320) is lower than a side surface of the first sealing member (423) facing the second column portion (320); Alternatively, a surface of the limiting member (410) facing away from the second column portion (320) is higher than a surface of the first sealing member (423) facing away from the second column portion (320).

8. The battery according to claim 2, characterized in that The battery further includes a first insulating member (500), the first insulating member (500) being arranged around the first column portion (310), and the first insulating member (500) abuts against the top cover (100) and the first column portion (310).

9. The battery according to claim 1, characterized in that The elastic modulus of the limiting member (410) is greater than the elastic modulus of the sealing member (420); the height of the limiting member (410) located between the fixing member (200) and the pole (300) along the height direction (Z) is H1; the natural height of the sealing member (420) located between the fixing member (200) and the pole (300) along the height direction (Z) is H2, and H1<H2.

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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