Battery and battery pack

Abstract

This application provides a battery and a battery pack. The battery includes a housing and terminals. The housing has mounting holes and a support portion lower than the upper surface of the housing. The terminals overlap the support portion, and in the height direction of the battery, part of them is disposed within the mounting holes, and part of them protrudes upward from the upper surface of the housing. The upper surface of the terminals is configured for fixed connection with a busbar. The protrusion height of the upper surface of the terminals relative to the upper surface of the housing is A, where A satisfies 2≤A≤4. This effectively reduces the height of the battery in this embodiment, increases the energy density of the battery, shortens the current path, reduces battery resistance, and improves charging efficiency. It also effectively avoids the busbar from overlapping with the upper surface of the housing, ensuring insulation between the busbar and the housing, preventing short circuits between the busbar and the housing, and ensuring the connection stability between the terminals and the busbar.

Description

Technical Field

[0001] This application relates to the field of batteries, specifically to a battery and a battery pack. Background Technology

[0002] In a battery, the terminals are located on the cover assembly and are mainly used to conduct electricity to the external circuit. They are usually made of a metal material with good conductivity and are electrically connected to the tabs of the positive or negative terminals.

[0003] In existing batteries, in order to reduce the overall height of the battery, a recessed cover plate design has been developed, which allows the lower surface of the terminal post to be lower than the upper surface of the cover plate assembly. However, when the lower surface of the terminal post is lower than the upper surface of the cover plate assembly, interference can easily occur between the busbar and the cover plate, which can also affect the normal operation of the battery. Utility Model Content

[0004] In view of this, embodiments of this application aim to provide a battery and battery pack to solve the problem in existing batteries that it is difficult to simultaneously reduce the overall height of the battery and suppress interference between the busbar and the cover plate.

[0005] The first aspect of this application provides a battery, comprising:

[0006] The housing has mounting holes and a support portion that is lower than the upper surface of the housing.

[0007] The terminal post overlaps the support portion above and, in the height direction of the battery, is partially disposed within the mounting hole and partially protrudes upward from the upper surface of the housing. The upper surface of the terminal post is configured for fixed connection with the busbar.

[0008] The protrusion height of the upper surface of the pole relative to the upper surface of the housing is A, where A satisfies 2≤A≤4, and the unit is mm.

[0009] Another aspect of this application provides a battery pack including at least one battery.

[0010] When the protrusion height A of the upper surface of the battery terminal relative to the upper surface of the casing in this embodiment satisfies 2≤A≤4, the height of the battery in this embodiment can be effectively reduced, thereby saving space occupied by the battery in the height direction, thus increasing the energy density of the battery, and shortening the current path of the corresponding terminal portion of the battery in this embodiment, thereby reducing the battery resistance and improving the charging efficiency of the battery in this embodiment; it can also effectively prevent the busbar from overlapping with the upper surface of the casing, ensuring that the busbar and the casing remain insulated and preventing short circuits between the busbar and the casing; and during the long-term operation of the battery in this embodiment, it prevents collisions between the busbar and the casing, thereby ensuring the connection stability between the terminal and the busbar, and thus ensuring that the battery pack containing the battery in this embodiment can work normally. Attached Figure Description

[0011] Figure 1 A three-dimensional structural schematic diagram of the battery of this application is shown;

[0012] Figure 2 A cross-sectional structural diagram of the battery and busbar of this application is shown;

[0013] Figure 3 This shows another cross-sectional structural schematic diagram of the battery and bus of this application;

[0014] Figure 4 A cross-sectional structural diagram of the battery of this application is shown.

[0015] Attached image labels:

[0016] 10. Housing; 11. Mounting hole; 12. Support part; 121. First overlapping part; 122. Second overlapping part; 123. Connecting section; 20. Terminal post; 21. First segment; 22. Second segment; 30. Busbar; 40. Adapter; 51. Cell body; 52. Tab; 60. Pressure ring; 71. First insulating seal; 72. Second insulating seal. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of this application. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0019] Many specific details are set forth in the following description to provide a full understanding of this application. However, this application can be implemented in many other ways than those described herein, and those skilled in the art can make similar extensions without departing from the spirit of this application; therefore, this application is not limited to the specific embodiments disclosed below. Techniques, methods, and apparatus known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0020] The terminology used in one or more embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the one or more embodiments of this application. The singular forms “a,” “the,” and “the” used in one or more embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” used in one or more embodiments of this application refers to and includes any or all possible combinations of one or more associated listed items.

[0021] It should be understood that although the terms first, second, etc., may be used to describe various information in one or more embodiments of this application, such information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, first may also be referred to as second without departing from the scope of one or more embodiments of this application, and similarly, second may also be referred to as first. Depending on the context, the word “if” as used herein may be interpreted as “when”, “in response to a determination”, or “upper”, “lower”, “front”, “back”, “left”, “right”, etc., are used only to indicate the relative positional relationship between related parts, and not to limit the absolute position of these related parts. In this document, “equal”, “same”, etc., are not strict mathematical and / or geometric limitations, and also include errors that are understandable to those skilled in the art and permissible in manufacturing or use. Unless otherwise stated, numerical ranges in this document include not only the entire range within its two endpoints, but also several sub-ranges contained therein.

[0022] like Figures 1 to 4 As shown in the figure, this application embodiment provides a battery, which includes at least a housing 10 and terminals 20. The housing 10 has mounting holes 11 and a support portion 12 that is lower than the upper surface of the housing 10.

[0023] Specifically, such as Figure 2 As shown, the terminal post 20 overlaps the support portion 12, and in the height direction of the battery, part of it is disposed within the mounting hole 11, and part of it protrudes upward from the upper surface of the housing 10. The upper surface of the terminal post 20 is configured for fixed connection with the busbar 30. It can be understood that the aforementioned height direction is the extension direction of the battery in this embodiment from the end where the terminal post 20 is disposed to the other end where the terminal post 20 is not disposed; the housing 10 in this embodiment may include a cover plate, and the terminal post 20 may be fixedly disposed on the cover plate of the battery.

[0024] Busbar 30 can be fixedly connected to the terminals 20 of two different batteries at the same time, so that multiple batteries can be electrically connected in series or in parallel to form a battery pack to output electrical energy or to be charged by an external circuit.

[0025] like Figure 4 As shown, in the battery of this application embodiment, since the upper surface of the support 12 is lower than the upper surface of the housing 10, the pole post 20 overlaps the upper part of the support 12. In the height direction of the battery, the pole post 20 is partially disposed in the mounting hole 11 and partially protrudes upward from the upper surface of the housing 10. The protrusion height of the upper surface of the pole post 20 relative to the upper surface of the housing 10 is A, where A satisfies 2≤A≤4, and the unit is mm.

[0026] When the protrusion height A of the upper surface of the terminal post 20 relative to the upper surface of the housing 10 is greater than 4, the overall height of the terminal post 20 and the housing 10 in the height direction of the battery in this embodiment is relatively high, which requires more space and thus reduces the energy density of the battery. In addition, the current path of the battery corresponding to the terminal post 20 is relatively long, which not only increases the overall resistance, but also reduces the charging efficiency of the battery in this embodiment.

[0027] When the protrusion height A of the upper surface of the terminal 20 relative to the upper surface of the housing 10 is less than 2, the distance between the busbar 30 and the upper surface of the housing 10 is too small, and the busbar 30 is prone to overlap with the upper surface of the housing 10, thereby affecting the insulation performance between the busbar 30 and the housing 10, and a short circuit is likely to occur between the busbar 30 and the housing 10. Furthermore, during the long-term operation of the battery in this embodiment, when the battery of this embodiment vibrates up and down along the height direction, the busbar 30 is prone to collision with the housing 10. The busbar 30 is easily deformed by the impact of the housing 10, thereby affecting the connection stability between the terminal 20 and the busbar 30, and may even cause the terminal 20 and the busbar 30 to separate, thereby causing an open circuit between the battery and other batteries, resulting in the battery pack containing the battery failing to work properly.

[0028] Therefore, when the protrusion height A of the upper surface of the battery terminal 20 relative to the upper surface of the housing 10 in this embodiment satisfies 2≤A≤4, the height of the battery in this embodiment can be effectively reduced, thereby saving the space occupied by the battery in the height direction, thus increasing the energy density of the battery, and shortening the current path of the battery corresponding to the terminal 20 portion, thereby reducing the battery resistance and improving the charging efficiency of the battery in this embodiment; it can also effectively prevent the busbar 30 from overlapping with the upper surface of the housing 10, ensuring that the busbar 30 and the housing 10 remain insulated and preventing short circuits between the busbar 30 and the housing 10; and during the long-term operation of the battery in this embodiment, it prevents collisions between the busbar 30 and the housing 10, thereby ensuring the connection stability between the terminal 20 and the busbar 30, and thus ensuring that the battery pack containing the battery in this embodiment can work normally.

[0029] It is understood that, in specific embodiments, the protrusion height A of the upper surface of the pole post 20 relative to the upper surface of the housing 10 can be selected as a specific value such as 2, 3, or 4; the battery in this application embodiment can be a battery of various shapes such as cylindrical battery, prismatic battery, and blade battery, and is not limited here.

[0030] Furthermore, such as Figure 4 As shown, in one embodiment of this application, the extension height of the terminal post 20 in the height direction of the battery is B, in mm; the ratio A / B of the protrusion height A of the upper surface of the terminal post 20 relative to the upper surface of the housing 10 and the extension height B of the terminal post 20 satisfies 0.2≤A / B≤0.5.

[0031] When the ratio A / B of the protrusion height A of the upper surface of the terminal post 20 relative to the upper surface of the housing 10 and the extension height B of the terminal post 20 satisfies 0.2≤A / B≤0.5, not only can the extension height B of the terminal post 20 in the height direction be reduced in this embodiment, thereby further shortening the current path of the battery corresponding to the terminal post 20 portion in this embodiment, so as to reduce the battery resistance and improve the charging efficiency of the battery in this embodiment, but it can also ensure that the terminal post 20 protrudes a certain height relative to the upper surface of the housing 10, thereby further avoiding the busbar 30 from overlapping with the upper surface of the housing 10, ensuring that the busbar 30 and the housing 10 remain insulated, preventing short circuits between the busbar 30 and the housing 10; and preventing collisions between the busbar 30 and the housing 10, thereby further improving the connection stability between the terminal post 20 and the busbar 30. In a specific embodiment, the ratio A / B of the protrusion height A of the upper surface of the pole post 20 relative to the upper surface of the housing 10 and the extension height B of the pole post 20 can take specific values ​​such as 0.2, 0.3, 0.4, 0.5, etc.

[0032] Furthermore, such as Figure 4As shown, in one embodiment of this application, the extension height B of the terminal post 20 satisfies 4 ≤ B ≤ 10 mm. When the extension height B of the terminal post 20 satisfies 4 ≤ B ≤ 10, the excessively long current path caused by the extension height of the terminal post 20 can be avoided, thus reducing battery resistance. It also ensures the overall structural strength of the terminal post 20 and guarantees that the protrusion height A of the upper surface of the terminal post 20 relative to the upper surface of the housing 10 meets the requirements. In specific embodiments, the extension height B of the terminal post 20 can take specific values ​​such as 4, 5, 8, and 10 mm.

[0033] Furthermore, such as Figure 4 As shown, in one embodiment of this application, the support portion 12 includes a first overlapping portion 121, and the pole post 20 overlaps the upper surface of the first overlapping portion 121; in the height direction of the battery, the height difference between the upper surface of the first overlapping portion 121 and the upper surface of the housing 10 is C, where C satisfies 1.5≤C≤5, and the unit is mm.

[0034] Since the terminal post 20 overlaps the upper surface of the first overlapping portion 121 of the support portion 12, and the height difference C between the upper surface of the first overlapping portion 121 and the upper surface of the housing 10 in the height direction of the battery satisfies 1.5≤C≤5, it can not only effectively improve the structural strength at the first overlapping portion 121 to ensure that the first overlapping portion 121 and the terminal post 20 remain relatively fixed; when a sealing structure such as a sealing ring is provided between the first overlapping portion 121 and the terminal post 20, it can effectively ensure that the sealing ring can guarantee the seal between the first overlapping portion 121 and the terminal post 20, preventing electrolyte leakage and other situations, thereby ensuring that the battery of this embodiment can work normally; moreover, it can also avoid the upper surface of the terminal post 20 protruding too much relative to the upper surface of the housing 10, thereby saving the space occupied by the battery in the height direction, thereby increasing the energy density of the battery, and shortening the current path of the battery corresponding to the terminal post 20 in this embodiment, thereby reducing the battery resistance and improving the charging efficiency of the battery of this embodiment. In a specific embodiment, the height difference C between the upper surface of the first overlapping part 121 and the upper surface of the shell 10 can be a specific value such as 1.5, 2, 3, 5, etc.

[0035] like Figure 4 As shown, in one embodiment of this application, the battery of this embodiment further includes a cell assembly. The housing 10 forms a receiving cavity, the cell assembly is disposed in the receiving cavity, and includes an integrally connected cell body 51 and a tab 52. In the height direction of the battery, the distance between the upper end face of the cell body 51 and the first overlapping portion 121 is D, where D satisfies 3≤D≤8, and the unit is mm.

[0036] Since the distance D between the upper surface of the cell body 51 and the first overlapping portion 121 in the height direction of the battery is 3≤D≤8, this not only ensures a certain distance between the cell body 51 and the first overlapping portion 121, thus ensuring relative insulation between them, but also prevents the tab 52 from extending too far in the height direction of the battery in this embodiment. This shortens the current path of the corresponding tab 52 portion of the battery in this embodiment, reduces battery resistance, and improves the charging efficiency of the battery in this embodiment. In specific embodiments, the distance D between the upper surface of the cell body 51 and the first overlapping portion 121 can take specific values ​​such as 3, 4, 6, and 8.

[0037] Specifically, such as Figure 2 As shown, in one embodiment of this application, the tab 52 is configured to be fixedly connected to the lower end face of the terminal post 20 and electrically connected to the terminal post 20. That is, in the battery of this application embodiment, the tab 52 and the terminal post 20 are directly fixedly connected, thereby further shortening the overall current path of the battery of this application embodiment, reducing the battery resistance, and improving the charging efficiency of the battery.

[0038] And such Figure 3 As shown, in one embodiment of this application, the battery of this application embodiment further includes an adapter 40; the adapter 40 is configured to be fixedly connected to the lower end surface of the terminal post 20, and the tab 52 is configured to be fixedly connected to the adapter 40 so as to be electrically connected to the terminal post 20 through the adapter 40.

[0039] In this embodiment of the application, a connector is provided on the lower end surface of the battery terminal 20, and the tab 52 is fixedly connected to the adapter 40 so as to electrically connect with the terminal 20 through the adapter 40. This facilitates battery assembly and effectively improves the assembly efficiency of the battery in this embodiment of the application.

[0040] like Figure 2 As shown, in one embodiment of this application, the support portion 12 further includes a second overlapping portion 122, which is located circumferentially outside the first overlapping portion 121, and in the height direction of the battery, the second overlapping portion 122 is higher than the first overlapping portion 121; the battery also includes a pressure ring 60, which is disposed circumferentially outside the electrode post 20, and is partially fixedly connected to the upper surface of the second overlapping portion 122, and partially abuts against the top of the electrode post 20.

[0041] In the battery of this application embodiment, a pressure ring 60 is provided on the outer circumferential side of the terminal post 20. The outer circumferential edge of the pressure ring 60 is fixedly connected to the upper surface of the second overlapping part 122, and the inner circumferential edge abuts against the top of the terminal post 20. The pressure ring 60 can effectively fix the terminal post 20, press and limit the terminal post 20, prevent the terminal post 20 from loosening or shifting relative to the housing 10, and enhance the structural stability of the battery of this application embodiment.

[0042] Furthermore, such as Figure 4 As shown, in one embodiment of this application, the height difference between the upper surface of the second overlapping portion 122 and the upper surface of the first overlapping portion 121 in the height direction of the battery is E, where E satisfies 0.2≤E≤2.5, and the unit is mm.

[0043] In the height direction of the battery, when the height difference E between the upper surface of the second overlapping portion 122 and the upper surface of the first overlapping portion 121 satisfies 0.2≤E≤2.5mm, deformation between the first overlapping portion 121 and the second overlapping portion 122 can be minimized, ensuring the supporting strength of the first overlapping portion 121, thereby ensuring that the first overlapping portion 121 and the terminal post 20 remain relatively fixed. When a sealing structure such as a sealing ring is provided between the first overlapping portion 121 and the terminal post 20, the sealing ring can effectively ensure the seal between the first overlapping portion 121 and the terminal post 20, preventing electrolyte leakage and other situations, thereby ensuring that the battery of this embodiment can work normally. In specific embodiments, the height difference E between the upper surface of the second overlapping portion 122 and the upper surface of the first overlapping portion 121 can take specific values ​​such as 0.2, 1, 2, 2.5, etc. Figure 2 As shown, in one embodiment of this application, along the height direction of the battery, the terminal post 20 is configured to include at least an integrally connected first segment 21 and a second segment 22. The first segment 21 is located below the second segment 22, and in the direction perpendicular to the height of the battery, the extension width of the first segment 21 is greater than the extension width of the second segment 22. The first segment 21 overlaps the support portion 12. The pressure ring 60 partially abuts against the second segment 22.

[0044] When the pressure ring 60 is partially fixedly connected to the upper surface of the second overlapping part 122 and partially abuts against the top of the pole post 20, it can effectively facilitate the pressure ring 60 to partially abut against the second segment 22 of the pole post 20, effectively reduce the overall height of the pressure ring 60, thereby effectively improving the structural strength of the pressure ring 60 and making the processing of the pressure ring 60 simpler.

[0045] like Figure 2As shown, in one embodiment of this application, a connecting segment 123 is provided between the first overlapping portion 121 and the second overlapping portion 122, and the connecting segment 123 is configured to extend along the height direction of the battery. Since the connecting segment 123 between the first overlapping portion 121 and the second overlapping portion 122 extends along the height direction of the battery, the first overlapping portion 121 and the connecting segment 123, and the second overlapping portion 122 and the connecting segment 123, are all perpendicular to each other. In this way, without changing the size of the terminal post 20, the space occupied by the first overlapping portion 121, the connecting segment 123 and the second overlapping portion 122 on the plane of the housing 10 is effectively saved, leaving space for the arrangement of other structures.

[0046] In another embodiment of this application, a connecting segment 123 is provided between the first overlapping portion 121 and the second overlapping portion 122, and in a cross-section along the battery height direction, the connecting segment 123 extends downward in a circumferentially outward direction towards the circumferentially inward direction. That is, the connecting segment 123 is inclined relative to the battery height direction, which makes the transition between the first overlapping portion 121 and the second overlapping portion 122 smoother, avoiding stress concentration at the angle between the first overlapping portion 121 and the connecting segment 123 or at the angle between the second overlapping portion 122 and the connecting segment 123, thereby minimizing deformation of the first overlapping portion 121 relative to the second overlapping portion 122.

[0047] like Figure 4 As shown, in one embodiment of this application, the extension width of the end of the pole post 20 that overlaps the support portion 12 in the direction perpendicular to the height of the battery is F, 0.8≤F≤3, in mm.

[0048] Because the extension width F of the end of the terminal post 20 that overlaps the support portion 12 in the direction perpendicular to the height of the battery satisfies 0.8≤F≤3, it not only ensures the connection strength between the terminal post 20 and the support portion 12, thereby increasing the pressure that the terminal post 20 can withstand and preventing the terminal post 20 from bending the support portion 12 downwards, but also prevents the terminal post 20 from falling out of the mounting hole 11, the terminal post 20 can also be stably mounted on the housing 10 when the battery of this embodiment experiences vertical vibration along the height direction. In specific embodiments, the extension width F of the end of the terminal post 20 that overlaps the support portion 12 can take specific values ​​such as 0.8, 1, 2, 3, etc.

[0049] In one embodiment of this application, in the height direction of the battery, the lower surface of the terminal post 20 is located above the lower surface of the support portion 12; or, in the height direction of the battery, the lower surface of the terminal post 20 is flush with the lower surface of the support portion 12. That is, in the battery of this application embodiment, the terminal post 20 does not protrude downward relative to the support portion 12, and the overall height of the terminal post 20 and its housing 10 in the height direction of the battery of this application embodiment is low, thereby reducing the height of the battery of this application embodiment, saving the space occupied by the battery in the height direction, thereby increasing the energy density of the battery, and shortening the current path of the battery corresponding to the terminal post 20 portion of the battery of this application embodiment, reducing battery resistance, and improving charging efficiency.

[0050] In another embodiment of this application, such as Figure 2 As shown, in one embodiment of this application, the lower surface of the terminal post 20 is located below the lower surface of the support portion 12 in the height direction of the battery. That is, in the battery of this embodiment, the terminal post 20 protrudes downward relative to the support portion 12, which not only facilitates the fixed connection between the terminal post 20 and the tab 52 or the adapter 40, but also allows for a certain distance between the cell body 51 and the support portion 12, thereby ensuring that the cell body 51 and the support portion 12 can maintain relative insulation.

[0051] like Figure 4 As shown, in one embodiment of this application, the height difference between the lower surface of the terminal post 20 and the lower surface of the support portion 12 in the height direction of the battery is G, where G≤2, in mm. Since the height difference G≤2mm between the lower surface of the terminal post 20 and the lower surface of the support portion 12 in the height direction of the battery can effectively shorten the overall height of the terminal post 20, thereby saving space occupied by the terminal post 20 in the height direction, increasing the energy density of the battery, and shortening the current path of the terminal post 20. In specific embodiments, the height difference G between the lower surface of the terminal post 20 and the lower surface of the support portion 12 can take specific values ​​such as 1, 1.5, or 2.

[0052] like Figure 2 As shown, in one embodiment of this application, an insulating sealing assembly is provided between the pole post 20 and the housing 10 and the pressure ring 60. The insulating sealing assembly is configured to keep the pole post 20, the housing 10 assembly, and the pressure ring 60 insulated and sealed.

[0053] By providing an insulating and sealing assembly between the terminal post 20 and the housing 10 assembly and the pressure ring 60, it is possible not only to ensure that the terminal post 20 and the housing 10, and the terminal post 20 and the pressure ring 60 are kept insulated, thus preventing short circuits between the terminal post 20 and the housing 10, and between the terminal post 20 and the pressure ring 60, thereby ensuring that the battery of this embodiment can work normally; it also prevents the battery cavity of this embodiment from communicating with the outside world, thereby preventing electrolyte leakage and preventing external substances such as water and oxygen from entering the battery.

[0054] Specifically, such as Figure 2 As shown in one embodiment of this application, the insulating sealing assembly includes a first insulating seal 71 and a second insulating seal 72. The first insulating seal 71 is disposed between the pole post 20 and the housing 10, and is at least partially located above the support portion 12; the second insulating seal 72 is disposed between the pole post 20 and the pressure ring 60, and is at least partially overlapped above the pole post 20.

[0055] The first insulating seal 71 is disposed between the terminal 20 and the housing 10, and is at least partially located above the support portion 12. The terminal 20 overlaps the support portion 12 through the first insulating seal 71. The first insulating seal 71 not only ensures insulation between the terminal 20 and the housing 10, preventing short circuits between them, but also seals the gap between the terminal 20 and the housing 10, preventing communication between the battery cavity and the outside environment, thereby preventing electrolyte leakage and preventing external substances such as water and oxygen from entering the battery. It is understood that the first insulating seal 71 can be the aforementioned sealing ring.

[0056] The second insulating seal 72 is disposed between the terminal post 20 and the pressure ring 60, and at least partially overlaps the terminal post 20. The pressure ring 60 can overlap the terminal post 20 through the second insulating seal 72. The second insulating seal 72 can not only ensure that the terminal post 20 and the pressure ring 60 are kept insulated to avoid short circuit between the terminal post 20 and the pressure ring 60, but also further seal the gap between the terminal post 20 and the pressure ring 60 to further prevent electrolyte leakage and prevent external substances such as water and oxygen from entering the battery.

[0057] The separate arrangement of the first insulating seal 71 and the second insulating seal 72 can effectively reduce the processing difficulty of the first insulating seal 71 and the second insulating seal 72 and improve the processing yield of the first insulating seal 71 and the second insulating seal 72.

[0058] This application also provides a battery pack, which includes at least one of the aforementioned batteries. It is understood that in one embodiment of this application, the battery pack may include at least one battery module, which includes at least one of the aforementioned batteries; in another embodiment of this application, the battery pack may be directly composed of at least one of the aforementioned batteries and other necessary devices.

[0059] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications or equivalent substitutions made within the spirit and principles of this application should be included within the protection scope of this application.

[0060] Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this application is defined by the appended claims.

Claims

1. A battery, characterized in that, include: The housing (10) has a mounting hole (11) and a support part (12) that is lower than the upper surface of the housing (10). The pole (20) overlaps the support (12) above and is partially disposed in the mounting hole (11) in the height direction of the battery, and partially protrudes upward from the upper surface of the housing (10). The upper surface of the pole (20) is configured to be fixedly connected to the busbar (30). The protrusion height of the upper surface of the pole post (20) relative to the upper surface of the housing (10) is A, where A satisfies 2≤A≤4, and the unit is mm.

2. The battery according to claim 1, characterized in that, In the height direction of the battery, the extension height of the terminal post (20) is B, in mm; The ratio A / B of the protrusion height A of the upper surface of the pole post (20) relative to the upper surface of the housing (10) and the extension height B of the pole post (20) satisfies 0.2≤A / B≤0.

5.

3. The battery according to claim 1, characterized in that, The extension height B of the pole post (20) satisfies 4≤B≤10, in mm.

4. The battery according to claim 1, characterized in that, The support portion (12) includes a first overlapping portion (121), and the pole post (20) overlaps the upper surface of the first overlapping portion (121); In the height direction of the battery, the height difference between the upper surface of the first overlapping part (121) and the upper surface of the housing (10) is C, where C satisfies 1.5≤C≤5, and the unit is mm.

5. The battery according to claim 4, characterized in that, It also includes a battery cell assembly, wherein the housing (10) forms a receiving cavity, the battery cell assembly is disposed in the receiving cavity, and includes an integrally connected battery cell body (51) and electrode tab (52); In the height direction of the battery, the distance between the upper end face of the cell body (51) and the first overlapping part (121) is D, where D satisfies 3≤D≤8, and the unit is mm.

6. The battery according to claim 5, characterized in that, The tab (52) is configured to be fixedly connected to the lower end face of the pole post (20) and electrically connected to the pole post (20).

7. The battery according to claim 5, characterized in that, It also includes an adapter (40); The adapter (40) is configured to be fixedly connected to the lower end face of the pole (20), and the tab (52) is configured to be fixedly connected to the adapter (40) so as to be electrically connected to the pole (20) through the adapter (40).

8. The battery according to claim 4, characterized in that, The support portion (12) further includes a second overlapping portion (122), which is located circumferentially outside the first overlapping portion (121), and in the height direction of the battery, the second overlapping portion (122) is higher than the first overlapping portion (121). The battery also includes a pressure ring (60), which is disposed on the circumferential outer side of the pole post (20) and is partially fixedly connected to the upper surface of the second overlapping part (122) and partially abuts against the top of the pole post (20).

9. The battery according to claim 8, characterized in that, In the height direction of the battery, the height difference between the upper surface of the second overlapping part (122) and the upper surface of the first overlapping part (121) is E, where E satisfies 0.2≤E≤2.5, and the unit is mm.

10. The battery according to claim 8, characterized in that, Along the height direction of the battery, the terminal post (20) is configured to include at least an integrally connected first segment (21) and a second segment (22), the first segment (21) being located below the second segment (22), and in the height direction perpendicular to the battery, the extension width of the first segment (21) being greater than the extension width of the second segment (22). The first segment (21) overlaps the support (12); the pressure ring (60) partially abuts against the second segment (22).

11. The battery according to claim 8, characterized in that, A connecting segment (123) is provided between the first overlapping portion (121) and the second overlapping portion (122), and the connecting segment (123) is configured to extend along the height direction of the battery.

12. The battery according to claim 8, characterized in that, A connecting segment (123) is provided between the first overlapping portion (121) and the second overlapping portion (122), and in a cross section along the height direction of the battery, the connecting segment (123) extends downward in a direction from the circumferential outer side to the circumferential inner side.

13. The battery according to claim 1, characterized in that, In the direction perpendicular to the height of the battery, the extension width of the end of the pole post (20) that overlaps the support (12) is F, where F satisfies 0.8≤F≤3, and the unit is mm.

14. The battery according to claim 1, characterized in that, In the height direction of the battery, the lower surface of the pole (20) is located above the lower surface of the support (12); Alternatively, in the height direction of the battery, the lower surface of the pole (20) is flush with the lower surface of the support (12).

15. The battery according to claim 1, characterized in that, In the height direction of the battery, the lower surface of the pole (20) is located below the lower surface of the support (12).

16. The battery according to claim 14, characterized in that, In the height direction of the battery, the height difference between the lower surface of the pole post (20) and the lower surface of the support (12) is G, G≤2, in mm.

17. The battery according to claim 8, characterized in that, An insulating sealing assembly is provided between the pole post (20), the housing (10), and the pressure ring (60). The insulating sealing assembly is configured to maintain insulation and sealing between the pole post (20), the housing (10), and the pressure ring (60).

18. The battery according to claim 17, characterized in that, The insulating sealing assembly includes a first insulating seal (71) and a second insulating seal (72). The first insulating seal (71) is disposed between the pole post (20) and the housing (10), and is at least partially located above the support portion (12). The second insulating seal (72) is disposed between the pole post (20) and the pressure ring (60), and is at least partially overlapped above the pole post (20).

19. A battery pack, characterized in that, It includes at least one battery according to any one of claims 1 to 18.

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