Battery and electric equipment

Abstract

The utility model belongs to the technical field of batteries, and discloses a battery and electric equipment, the battery comprises a shell and a cover body covering the shell, an accommodating cavity is formed between the shell and the cover body, a battery cell is arranged in the accommodating cavity, and the battery cell is provided with a first tab and a second tab; two pole assemblies are arranged on the shell, each pole assembly comprises a through hole communicated with the accommodating cavity, and a mounting groove communicated with the through hole is formed in one side, far away from the accommodating cavity, of each pole assembly; the first tab penetrates through the through hole of one pole assembly and is connected with the pole assembly in the corresponding mounting groove; and the second tab penetrates through the through hole of the other pole assembly and is connected with the pole assembly in the corresponding mounting groove. The battery can improve the space utilization rate of the accommodating cavity and the energy density of the battery.

Description

Technical Field

[0001] This utility model belongs to the field of battery technology, specifically relating to a battery and an electrical device. Background Technology

[0002] In existing square batteries, the terminals are usually located on the top of the cover plate. The cover plate is designed separately from the casing, which means that the tabs need to be bent along a long path to be welded to the terminals or connecting pieces. This occupies the top space inside the battery, reduces the utilization rate of the internal space of the battery, and affects the energy density. Utility Model Content

[0003] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a battery and an electrical device.

[0004] A first aspect of this utility model provides a battery, comprising: a housing and a cover fitted onto the housing, wherein a receiving cavity is formed between the housing and the cover, and a battery cell is disposed within the receiving cavity, the battery cell having a first tab and a second tab;

[0005] The housing is provided with two pole post assemblies, each pole post assembly including a through hole communicating with the receiving cavity, and a mounting groove communicating with the through hole on the side of the pole post assembly away from the receiving cavity;

[0006] The first tab passes through a through hole in one of the electrode components and is connected to the electrode component in the corresponding mounting slot; the second tab passes through a through hole in another electrode component and is connected to the electrode component in the corresponding mounting slot.

[0007] The battery provided by this utility model optimizes the connection position and connection method between the first tab and the second tab and the terminal assembly, so that the first tab and the second tab are connected to the terminal assembly in the mounting groove on the outside of the receiving cavity, effectively reducing the bending path of the first tab and the second tab in the receiving cavity, improving the space utilization of the receiving cavity, and thus improving the energy density of the battery.

[0008] In addition, the battery of this utility model may also have the following additional technical features:

[0009] In some embodiments, the first tab and the second tab are located on the same side of the battery cell, and the two electrode assemblies are disposed on the same wall of the housing;

[0010] or,

[0011] The first tab and the second tab are located on opposite sides of the battery cell, and the two pole post assemblies are disposed on opposite side walls of the housing.

[0012] In some embodiments, the housing includes a first sidewall and a second sidewall disposed opposite to each other along a first direction; wherein, the first sidewall has two mounting holes, or, the first sidewall and the second sidewall each have one mounting hole; one pole assembly is installed in each mounting hole, and the pole assembly is insulated from the housing through the mounting hole.

[0013] In some embodiments, the pole assembly includes a base, with a first limiting member and a second limiting member respectively provided on both sides of the base. The base passes through the mounting hole, and the first limiting member and the second limiting member respectively abut against the inner and outer surfaces of the first sidewall or the second sidewall.

[0014] The base has a through hole along its axial direction that passes through the first limiting member, the base, and the second limiting member in sequence. The first limiting member is located on the inner side of the first sidewall, and the second limiting member is located on the outer side of the first sidewall. The second limiting member has a mounting groove that covers the through hole, and a baffle is installed in the mounting groove.

[0015] In some embodiments, a sealing element is provided in the mounting hole, a first insulating element is provided between the first limiting element and the first sidewall, and a second insulating element is provided between the second limiting element and the first sidewall, and the substrate passes through the first insulating element, the mounting hole and the second insulating element in sequence.

[0016] In some embodiments, the shape of the through hole is adapted to the shape of the first tab or the second tab.

[0017] In some embodiments, the housing further includes a third sidewall and a fourth sidewall disposed opposite to each other along a second direction, the second direction intersecting the first direction; a face wall is provided on the same side of the first sidewall, the second sidewall, the third sidewall and the fourth sidewall, the first sidewall, the third sidewall, the second sidewall, the fourth sidewall and the face wall together to form a housing having an open end on one side and an internal receiving cavity;

[0018] The third sidewall and the fourth sidewall have equal areas, the area of ​​the opening end is greater than the area of ​​the first sidewall, the area of ​​the opening end is greater than the area of ​​the second sidewall, and the area of ​​the opening end is greater than the area of ​​the third sidewall.

[0019] In some embodiments, a boss is provided on the end face of the cover near the housing, and the cover is inserted into and sealed with the housing through the boss.

[0020] In some embodiments, the cover is provided with at least one pressure relief groove, the pressure relief groove being located on the end face of the cover near the housing, or / and the pressure relief groove being located on the end face of the cover away from the housing;

[0021] or / and,

[0022] The housing is provided with at least one pressure relief groove, which is located on the end face of the housing near the cover, or / and on the end face of the housing away from the cover.

[0023] A second aspect of this utility model is to provide an electrical device, which includes the battery described in any embodiment of this application.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0026] Figure 1 An exemplary three-dimensional structural diagram of a battery provided in an embodiment of this application;

[0027] Figure 2 An exploded view of a battery provided in an embodiment of this application;

[0028] Figure 3 This is an exploded view of the housing and pole assembly assembly provided in an embodiment of this application;

[0029] Figure 4 An exemplary structural diagram of the housing provided in the embodiments of this application;

[0030] Figure 5 This is an exemplary structural diagram of a battery cell provided in an embodiment of this application;

[0031] Figure 6 A cross-sectional view of a battery provided in an embodiment of this application;

[0032] Figure 7 for Figure 6 Enlarged view of a portion of point A in the middle;

[0033] Figure 8 A cross-sectional view of the housing and cover fitting together, provided in an embodiment of this application;

[0034] Figure 9 An exemplary three-dimensional structural diagram of the pole post assembly provided in the embodiments of this application;

[0035] Figure 10 An exemplary three-dimensional structural diagram of the pole post assembly provided in the embodiments of this application;

[0036] Figure 11 A cross-sectional view of the pole assembly provided in an embodiment of this application;

[0037] Figure 12 An exemplary structural diagram of the first insulating element provided in the embodiments of this application;

[0038] Figure 13 An exemplary structural diagram of the second insulating member provided in the embodiments of this application;

[0039] Figure 14 An exemplary structural diagram of the cover provided in an embodiment of this application.

[0040] In the above image:

[0041] 10 Housing; 101 First sidewall; 1010 Mounting hole; 102 Second sidewall; 103 Third sidewall; 104 Fourth sidewall; 105 Face wall; 106 Receiving cavity;

[0042] 20 Cover; 201 Boss; 202 Pressure relief groove;

[0043] 30 Battery cell; 301 First tab; 302 Second tab;

[0044] 40. Pole post assembly; 401. Base; 402. First limiting member; 403. Second limiting member; 4030. Mounting groove; 404. Through hole;

[0045] 50 Seal; 60 First Insulator; 600 Clearance Hole; 601 Groove; 70 Second Insulator; 80 Baffle. Detailed Implementation

[0046] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0047] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0048] The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The singular forms “a,” “the,” and “the” as used in 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” as used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0049] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".

[0050] In the description of this specification, the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples," etc., are intended to indicate that a particular feature, structure, material, or characteristic associated with that embodiment or example is included in at least one embodiment or example of this disclosure. The illustrative representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics mentioned may be included in any suitable manner in any one or more embodiments or examples.

[0051] 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 indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0052] The first aspect of this utility model is as follows: Figures 1 to 8 As shown, a battery is provided, including: a housing 10 and a cover 20 covering the housing 10, a receiving cavity 106 is formed between the housing 10 and the cover 20, a battery cell 30 is disposed in the receiving cavity 106, and the battery cell 30 has a first tab 301 and a second tab 302.

[0053] The housing 10 is provided with two pole post assemblies 40. Each pole post assembly 40 includes a through hole 404 communicating with the receiving cavity 106. The side of the pole post assembly 40 away from the receiving cavity 106 is provided with a mounting groove 4030 communicating with the through hole 404.

[0054] The first tab 301 passes through a through hole 404 of one of the pole post assemblies 40 and is connected to the pole post assembly 40 in the corresponding mounting groove 4030; the second tab 302 passes through a through hole 404 of another pole post assembly 40 and is connected to the pole post assembly 40 in the corresponding mounting groove 4030.

[0055] Specifically, the shell 10 is an integrally formed structure with an open end on one side and an internal receiving cavity 106. The cover 20 is an integrally formed structure that can cover the open end of the shell 10 to form a closed structure for the receiving cavity 106. The battery cell 30 is the core part inside the battery and is mainly composed of a positive electrode, a negative electrode, a separator, and an electrolyte. The separator is located between the positive electrode and the negative electrode. The positive electrode is connected to a first tab 301, and the negative electrode is connected to a second tab 302.

[0056] Two terminal post assemblies 40 are fixedly mounted on the housing 10. The terminal post assembly 40 has a through hole 404 and a mounting groove 4030. The mounting groove 4030 is located outside the receiving cavity 106. The receiving cavity 106, the through hole 404 and the mounting groove 4030 are sequentially connected. The first electrode tab 301 and the second electrode tab 302 located in the receiving cavity 106 can respectively pass through their corresponding through holes 404 and extend into their corresponding mounting grooves 4030. They are welded to their corresponding terminal post assemblies 40 in the mounting grooves 4030, which avoids the first electrode tab 301 and the second electrode tab 302 from bending in the receiving cavity 106 or welding to the terminal post or connecting piece in the receiving cavity 106. This reduces the space occupied in the receiving cavity 106, improves the space utilization of the receiving cavity 106, thereby increasing the energy density of the battery, and also avoids the first electrode tab 301 and the second electrode tab 302 from bending to the top of the receiving cavity 106, which would cause structural stress concentration. The first tab 301 can overlap one or both sides of the mounting groove 4030. The first tab 301 overlapping in the mounting groove 4030 is shorter and has less bending, reducing stress. The second tab 302 overlaps in the corresponding mounting groove 4030 in the same way, which will not be described again in this application. In addition, electrolyte or the like can be injected into the receiving cavity 106 through the through hole 404, avoiding the need for opening the shell 10.

[0057] The shell 10 and the cover 20 can be made of the same or different metal materials, including but not limited to stainless steel, aluminum and its alloys, or magnesium alloys.

[0058] The battery provided by this utility model optimizes the connection position and connection method between the first tab 301 and the second tab 302 and the terminal assembly 40, so that the first tab 301 and the second tab 302 are connected to the terminal assembly 40 in the mounting groove 4030 on the outside of the receiving cavity 106. This effectively reduces the bending path of the first tab 301 and the second tab 302 in the receiving cavity 106, improves the space utilization of the receiving cavity 106, and thus improves the energy density of the battery.

[0059] In some embodiments, the first tab 301 and the second tab 302 are located on the same side of the battery cell 30, and the two electrode post assemblies 40 are disposed on the same wall of the housing 10;

[0060] or,

[0061] The first tab 301 and the second tab 302 are located on opposite sides of the battery cell 30, and the two pole post assemblies 40 are disposed on opposite side walls of the housing 10.

[0062] The battery cell 30 can be a battery cell with tabs on the same side or a battery cell with tabs on both sides. A battery cell with tabs on the same side means that the first tab 301 and the second tab 302 are located on the same side of the battery cell 30. A battery cell with tabs on both sides means that the first tab 301 and the second tab 302 are located on opposite sides of the battery cell 30.

[0063] like Figures 1 to 5 As shown, if the battery cell 30 is a battery cell with tabs on the same side, then the terminal assembly 40 is installed on the same side wall of the housing 10 at the positions corresponding to the first tab 301 and the second tab 302, so that the first tab 301 and the second tab 302 pass through the through hole 404 on the corresponding terminal assembly 40 and extend into the corresponding mounting groove 4030, and are welded to the corresponding terminal assembly 40 in the mounting groove 4030.

[0064] If the battery cell 30 is a battery cell with tabs on both sides, then the two oppositely arranged side walls of the housing 10 are respectively equipped with pole post assemblies 40 at positions corresponding to the first tab 301 and the second tab 302, so that the first tab 301 and the second tab 302 pass through the through holes 404 on the corresponding pole post assemblies 40 and extend into the corresponding mounting grooves 4030, and are welded to the corresponding pole post assemblies 40 in the mounting grooves 4030.

[0065] In some embodiments, the housing 10 includes a first sidewall 101 and a second sidewall 102 disposed opposite to each other along a first direction; wherein, the first sidewall 101 has two mounting holes 1010, or, the first sidewall 101 and the second sidewall 102 are each provided with a mounting hole 1010; a pole post assembly 40 is installed in each mounting hole 1010, and the pole post assembly 40 is insulated from the housing 10 through the mounting hole 1010.

[0066] Specifically, the battery provided in this application embodiment can meet the assembly requirements of single-sided tab cells or dual-sided tab cells, and each terminal assembly 40 is insulated from the housing 10 through the mounting hole 1010 to avoid problems such as short circuit caused by direct connection between the first tab 301 and the second tab 302.

[0067] For example, such as Figure 3As shown, two mounting holes 1010 are provided on the first sidewall 101. The two pole post assemblies 40 are respectively installed in the corresponding mounting holes 1010 to meet the assembly requirements of the same-side output tab battery cells. That is, the first tab 301 and the second tab 302 of the battery cell 30 both pass through the first sidewall 101 and are stored in the corresponding mounting groove 4030, and are welded to the corresponding pole post assembly 40 in the mounting groove 4030.

[0068] For example, both the first sidewall 101 and the second sidewall 102 are provided with pole mounting holes 1010 to meet the assembly requirements of the battery cells with tabs on both sides. That is, the first tab 301 of the battery cell 30 passes through the first sidewall 101 and is housed in the corresponding mounting groove 4030, and is welded to the corresponding pole assembly 40 in the mounting groove 4030; the second tab 302 of the battery cell 30 passes through the second sidewall 102 and is housed in the corresponding mounting groove 4030, and is welded to the corresponding pole assembly 40 in the mounting groove 4030.

[0069] In this example, the terminal assembly 40 is mounted on the housing 10 through the mounting holes 1010 on the side wall of the housing 10, reducing the space occupied by the terminal assembly 40 in the housing 10's receiving cavity 106 and further improving the space utilization of the receiving cavity 106. Preferably, two mounting holes 1010 are provided on the first side wall 101 to meet the assembly requirements of the same-side tab cells. That is, the first tab 301 and the second tab 302 of the cell 30 both protrude from the first side wall 101 and are housed in the corresponding mounting groove 4030, and are welded to the corresponding terminal assembly 40 in the mounting groove 4030. In this way, the distance between the cell 30 and the second side wall 102 in the receiving cavity 106 is shortened, reducing the space occupied by the terminal assembly 40 in the housing 10's receiving cavity 106 and further improving the space utilization of the receiving cavity 106.

[0070] In some implementations, such as Figures 6 to 11 As shown, the pole assembly 40 includes a base 401, and a first limiting member 402 and a second limiting member 403 are respectively provided on both sides of the base 401. The base 401 passes through the mounting hole 1010, and the first limiting member 402 and the second limiting member 403 respectively abut against the inner and outer surfaces of the first sidewall 101 or the second sidewall 102.

[0071] The base 401 has a through hole 404 along its axial direction, which passes through the first limiting member 402, the base 401 and the second limiting member 403 in sequence. The first limiting member 402 is located inside the first side wall 101 and the second limiting member 403 is located outside the first side wall 101. The second limiting member 403 has a mounting groove 4030 covering the through hole 404, and a baffle 80 is installed in the mounting groove 4030.

[0072] Specifically, the first limiting member 402, the base 401, and the second limiting member 403 can be integrally formed from the same metal material, forming an I-shaped structure. The first limiting member 402 is located on the inner side of the first sidewall 101. The base 401 of the pole assembly 40 forms an insulating seal with the housing 10 through a riveting process. That is, the base 401 passes through the mounting hole 1010, extends out of the first sidewall 101, and is bent to form the second limiting member 403. The first limiting member 402 and the second limiting member 403 respectively abut against the inner and outer surfaces of the first sidewall 101 to achieve a fixed connection between the pole and the first sidewall 101. The shapes of the first limiting member 402 and the second limiting member 403 can be set according to actual needs. For example, the first limiting member 402 and the second limiting member 403 can be square plates, circular plates, etc. The inner side of the first sidewall 101 refers to the side closer to the receiving cavity 106, and the outer side of the first sidewall 101 refers to the side away from the receiving cavity 106.

[0073] Through holes 404 are provided on the first limiting member 402, the base 401 and the second limiting member 403. Electrolyte can be injected into the battery receiving cavity 106 through the through holes 404 to avoid drilling operations on the housing 10 again. The second limiting member 403 has a mounting groove 4030 communicating with the through hole 404 on the side away from the first limiting member 402. The mounting groove 4030 covers the through hole 404 and the area of ​​the mounting groove 4030 is larger than the area of ​​the through hole 404. A baffle 80 is provided in the mounting groove 4030. The first tab 301 or the second tab 302 passes through the corresponding through hole 404 and extends into the corresponding mounting groove 4030. It overlaps with the second limiting member 403 in the mounting groove 4030. After the electrolyte injection and the welding operation of the first tab 301 and the second tab 302 are completed, the through hole 404 can be sealed by installing the baffle 80 in the mounting groove 4030, thus maintaining the overall sealing of the battery.

[0074] In some implementations, such as Figure 3 , Figure 6 and Figure 7 As shown, a sealing element 50 is provided in the mounting hole 1010, a first insulating element 60 is provided between the first limiting element 402 and the first side wall 101, and a second insulating element 70 is provided between the second limiting element 403 and the first side wall 101. The base 401 passes through the first insulating element 60, the mounting hole 1010 and the second insulating element 70 in sequence.

[0075] Specifically, the sealing element 50 can be made of rubber. The sealing element 50 is installed inside the mounting hole 1010. The base 401 is connected to the first sidewall 101 through the sealing element 50, thus insulating the outer surface of the base 401 from the first sidewall 101. The first insulating element 60 is an insulating plate, located between the first limiting member 402 and the first sidewall 101. The area of ​​the first insulating element 60 is larger than the area of ​​the first limiting member 402, and the first insulating element 60 partially covers the first limiting member 402, thus ensuring the first... The limiting member 402 and the first side wall 101 are insulated from each other; the second insulating member 70 is an insulating plate, and the second insulating member 70 is located between the second limiting member 403 and the first side wall 101. The area of ​​the second insulating member 70 is larger than the area of ​​the second limiting member 403, and the second insulating member 70 partially covers the second limiting member 403, so that the second limiting member 403 and the first side wall 101 are insulated from each other, thereby making the pole post insulated from the first side wall 101, avoiding short circuits caused by the connection of the first pole tab 301 and the second pole tab 302.

[0076] It is understandable that, such as Figure 12 As shown, the first insulating member 60 and the second insulating member 70 are provided with clearance holes 600 to avoid the base 401 on the pole post assembly 40. The base 401 passes through the clearance holes 600 to fix the first insulating member 60 between the first limiting member 402 and the first side wall 101, and the base 401 passes through the clearance holes 600 to fix the second insulating member 70 between the first side wall 101 and the second limiting member 403.

[0077] It should be noted that, as Figure 13 As shown, a groove 601 may be provided on the opposite side of the first insulating member 60 and the second insulating member 70. At least a portion of the first limiting member 402 is assembled in the groove 601 of the first insulating member 60, and at least a portion of the second limiting member 403 is assembled in the groove 601 of the second insulating member 70. That is, the first insulating member 60 partially covers the first limiting member 402, and the second insulating member 70 partially covers the second limiting member 403. This not only ensures the insulation performance between the terminal assembly 40 and the housing 10, but also makes the overall volume of the battery smaller.

[0078] In some implementations, such as Figure 9 and Figure 10 As shown, the shape of the through hole 404 is adapted to the shape of the first tab 301 or the second tab 302.

[0079] Specifically, the first tab 301 and the second tab 302 are generally flat square structures, and the through hole 404 also adopts a square structure. The area of ​​the through hole 404 is slightly larger than the area of ​​the first tab 301 and the second tab 302, so that the first tab 301 and the second tab 302 can pass through the corresponding through hole 404.

[0080] In some implementations, such as Figure 4 As shown, the housing 10 also includes a third sidewall 103 and a fourth sidewall 104 disposed opposite to each other along a second direction, the second direction intersecting the first direction; a face wall 105 is disposed on the same side of the first sidewall 101, the second sidewall 102, the third sidewall 103 and the fourth sidewall 104, the first sidewall 101, the third sidewall 103, the second sidewall 102, the fourth sidewall 104 and the face wall 105, and the housing 100 is formed by enclosing a housing 10 with an open end on one side and an internal receiving cavity 106;

[0081] The third sidewall 103 and the fourth sidewall 104 have the same area, the area of ​​the opening end is greater than the area of ​​the second sidewall 102, the area of ​​the opening end is greater than the area of ​​the first sidewall 101, and the area of ​​the opening end is greater than the area of ​​the third sidewall 103.

[0082] Specifically, the second direction intersects with the first direction, preferably arranged perpendicularly. The third sidewall 103 and the fourth sidewall 104 have the same area, and the area of ​​the face wall 105 is larger than the areas of the first sidewall 101 and the second sidewall 102, and the area of ​​the face wall 105 is larger than the area of ​​the third sidewall 103. The first sidewall 101, the third sidewall 103, the second sidewall 102, the fourth sidewall 104, and the face wall 105 are sequentially arranged to form a square shell 10 structure with an open end on one side and an internal receiving cavity 106. The open end is arranged opposite to the face wall 105, so that the area of ​​the open end is larger, which is conducive to the assembly of the battery cell 30 into the receiving cavity 106 from the open end, and the assembly of the battery cell 30 is convenient.

[0083] In some implementations, such as Figure 8 As shown, a boss 201 is provided on the end face of the cover 20 near the housing 10, and the cover 20 is inserted and sealed with the housing 10 through the boss 201.

[0084] Specifically, the inner surface of the cover 20 has a boss 201 that protrudes towards one side of the housing 10. The boss 201 can be fitted into the open end of the housing 10 to make the housing 10 and the cover 20 seal together. The cover 20 and the housing 10 are welded together around the boss 20 to ensure the overall sealing of the battery.

[0085] In some implementations, such as Figure 14 As shown, at least one pressure relief groove 202 is provided on the cover 20. The pressure relief groove 202 is located on the end face of the cover 20 near the housing 10, or / and the pressure relief groove 202 is located on the end face of the cover 20 away from the housing 10.

[0086] or / and,

[0087] The housing 10 is provided with at least one pressure relief groove 202, the pressure relief groove 202 is located on the end face of the housing 10 near the cover 20, or / and the pressure relief groove 202 is located on the end face of the housing 10 away from the cover 20.

[0088] Specifically, the cover 20 and / or the housing 10 are provided with pressure relief grooves 202. The number and shape of the pressure relief grooves 202 can be set according to actual needs. The pressure relief grooves 202 can be set on the inner surface (the end face of the cover 20 near the housing 10) or the outer surface (the end face of the cover 20 away from the housing 10); or / and, the pressure relief grooves 202 can be set on the inner surface (the end face of the housing 10 near the cover 20) or the outer surface (the end face of the housing 10 away from the cover 20). For example, the number of pressure relief grooves 202 is 1 to 6, and the shape of the pressure relief grooves 202 can be arc-shaped, straight, or zigzag. When the gas generated by the battery cell 30 inside the battery is large and the pressure is high, the setting of the pressure relief grooves 202 causes the cover 20 and / or the housing 10 to be ruptured first at the position of the pressure relief grooves 202, which plays a role in explosion prevention and pressure relief.

[0089] In some implementations, such as Figures 1 to 3 As shown, the pressure relief groove 202 is disposed on the cover 20 near the first electrode tab 301 and / or the second electrode tab 302;

[0090] Or / and, the pressure relief groove 202 is disposed on the housing 10 near the first electrode 301 or / and the second electrode 302.

[0091] Specifically, the pressure relief groove 202 can be disposed at any position on the cover 20 and / or the housing 10. Since there is a greater amount of gas generated near the first tab 301 and the second tab 302 of the battery cell 30, in this embodiment, the pressure relief groove 202 is disposed on the cover 20 and / or the housing 10 near the first tab 301 and / or the second tab 302 to facilitate pressure relief. For example, the cover 20 has two arc-shaped pressure relief grooves 202 near the first tab 301, and / or two arc-shaped pressure relief grooves 202 near the second tab 302.

[0092] A second aspect of this utility model is to provide an electrical device, which includes the battery described in any embodiment of this application.

[0093] Specifically, the battery can be a lithium-ion battery, or a square battery. The specific technical features and effects of the electrical equipment are consistent with those of the battery, and will not be repeated in the embodiments of this application.

[0094] It should be noted that electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This utility model embodiment does not impose any special limitations on the above-mentioned electrical equipment.

[0095] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A battery, characterized in that, include: The housing (10) and the cover (20) covering the housing (10) form a receiving cavity (106) between the housing (10) and the cover (20), and a battery cell (30) is disposed in the receiving cavity (106). The battery cell (30) has a first tab (301) and a second tab (302). Two pole post assemblies (40) are provided on the housing (10). Each pole post assembly (40) includes a through hole (404) communicating with the receiving cavity (106). A mounting groove (4030) communicating with the through hole (404) is provided on the side of the pole post assembly (40) away from the receiving cavity (106). The first tab (301) passes through a through hole (404) of one of the pole post assemblies (40) and is connected to the pole post assembly (40) in the corresponding mounting groove (4030); the second tab (302) passes through a through hole (404) of another pole post assembly (40) and is connected to the pole post assembly (40) in the corresponding mounting groove (4030).

2. The battery according to claim 1, characterized in that, The first tab (301) and the second tab (302) are located on the same side of the cell (30), and the two pole post assemblies (40) are disposed on the same wall of the housing (10); or, The first tab (301) and the second tab (302) are located on opposite sides of the cell (30), and the two pole post assemblies (40) are disposed on opposite side walls of the housing (10).

3. The battery according to claim 2, characterized in that, The housing (10) includes a first sidewall (101) and a second sidewall (102) disposed opposite to each other along a first direction; wherein, the first sidewall (101) has two mounting holes (1010), or the first sidewall (101) and the second sidewall (102) are respectively provided with a mounting hole (1010); a pole post assembly (40) is installed in each mounting hole (1010), and the pole post assembly (40) is insulated from the housing (10) through the mounting hole (1010).

4. The battery according to claim 3, characterized in that, The pole assembly (40) includes a base (401), and a first limiting member (402) and a second limiting member (403) are respectively provided on both sides of the base (401). The base (401) passes through the mounting hole (1010), and the first limiting member (402) and the second limiting member (403) respectively abut against the inner and outer surfaces of the first sidewall (101) or the second sidewall (102). The base (401) has a through hole (404) along its axial direction, which passes through the first limiting member (402), the base (401) and the second limiting member (403) in sequence. The first limiting member (402) is located inside the first side wall (101), and the second limiting member (403) is located outside the first side wall (101). The second limiting member (403) has a mounting groove (4030) covering the through hole (404), and a baffle (80) is installed in the mounting groove (4030).

5. The battery according to claim 4, characterized in that, A sealing element (50) is provided in the mounting hole (1010), a first insulating element (60) is provided between the first limiting element (402) and the first side wall (101), and a second insulating element (70) is provided between the second limiting element (403) and the first side wall (101). The substrate (401) passes through the first insulating element (60), the mounting hole (1010) and the second insulating element (70) in sequence.

6. The battery according to claim 1, characterized in that, The shape of the through hole (404) is adapted to the shape of the first tab (301) or the second tab (302).

7. The battery according to claim 3, characterized in that, The housing (10) further includes a third sidewall (103) and a fourth sidewall (104) disposed opposite to each other along a second direction, the second direction being intersected with the first direction; a face wall (105) is disposed on the same side of the first sidewall (101), the second sidewall (102), the third sidewall (103), and the fourth sidewall (104), the first sidewall (101), the third sidewall (103), the second sidewall (102), the fourth sidewall (104), and the face wall (105) together form a housing (10) having an open end on one side and an internal receiving cavity (106); The third sidewall (103) and the fourth sidewall (104) have the same area, the area of ​​the opening end is greater than the area of ​​the first sidewall (101), the area of ​​the opening end is greater than the area of ​​the second sidewall (102), and the area of ​​the opening end is greater than the area of ​​the third sidewall (103).

8. The battery according to claim 1, characterized in that, The cover (20) has a boss (201) on one end face near the housing (10), and the cover (20) is inserted into and sealed with the housing (10) through the boss (201).

9. The battery according to claim 1, characterized in that, At least one pressure relief groove (202) is provided on the cover (20), the pressure relief groove (202) is located on the side end face of the cover (20) close to the housing (10), or / and, the pressure relief groove (202) is located on the side end face of the cover (20) away from the housing (10); or / and, At least one pressure relief groove (202) is provided on the housing (10), the pressure relief groove (202) is located on the side end face of the housing (10) near the cover (20), or / and the pressure relief groove (202) is located on the side end face of the housing (10) away from the cover (20).

10. An electrical appliance, characterized in that, The electrical equipment includes the battery as described in any one of claims 1-9.

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