Battery monomer and battery pack

Abstract

The utility model provides a battery monomer and a battery pack, and relates to the technical field of batteries. The single battery has a first direction and comprises a shell with a containing cavity, a cover plate connected with the shell to seal the containing cavity, an electrode assembly arranged in the containing cavity, a first pole penetrating through the cover plate and electrically connected with the electrode assembly, a second pole penetrating through the cover plate and electrically connected with the electrode assembly, and an anti-explosion valve arranged on the shell, the circuit board is located on the side, away from the electrode assembly, of the cover plate in the first direction. And the circuit board is electrically connected with the first pole and the second pole. According to the battery monomer provided by the invention, the circuit board and the explosion-proof valve are far away from each other, so that the interference of the explosion-proof valve on the circuit board is reduced, and the reliability and the stability of the circuit board are improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cell and a battery pack. Background Technology

[0002] The information disclosed in this background section is intended only to enhance the understanding of the general background of this disclosure and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art.

[0003] Battery cells employing intelligent technology typically incorporate circuit boards to acquire data throughout the battery cell's lifecycle, thereby predicting and mitigating potential safety and reliability risks. However, the existing explosion-proof valves within the battery cells can interfere with the normal operation of the circuit board when performing their venting function, thus affecting the circuit board's reliability and stability. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a battery cell and a battery pack, which aims to solve the technical problem that explosion-proof valves can easily interfere with the normal functioning of circuit boards, thereby affecting the reliability and stability of circuit boards.

[0005] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0006] In a first aspect, embodiments of this application provide a battery cell having a first orientation, the battery cell comprising:

[0007] The shell has a receiving cavity;

[0008] A cover plate is connected to the housing to seal the receiving cavity;

[0009] The electrode assembly is disposed within the receiving cavity;

[0010] The first electrode post is disposed through the cover plate and is electrically connected to the electrode assembly;

[0011] The second electrode post is disposed through the cover plate and is electrically connected to the electrode assembly;

[0012] An explosion-proof valve is installed on the housing;

[0013] The circuit board is located on the side of the cover plate opposite to the electrode assembly along the first direction, and is electrically connected to the first electrode post and the second electrode post.

[0014] In one embodiment of the first aspect, the cover plate and the explosion-proof valve are disposed opposite each other along the first direction.

[0015] In one embodiment of the first aspect, the circuit board includes a first connector, a board body, and a second connector connected in sequence, the board body being located between the first pole and the second pole, the first connector being connected to the first pole, and the second connector being connected to the second pole.

[0016] In one embodiment of the first aspect, the first electrode post includes a first electrode post body and a second electrode post body. The first electrode post body is disposed through the cover plate and electrically connected to the electrode assembly. The second electrode post body is located on the side of the cover plate away from the electrode assembly along the first direction. The second electrode post body includes a first electrode post portion and a first protrusion connected to each other. The first electrode post portion is connected to the first electrode post body. The first protrusion is located on the side of the first electrode post portion near the plate body and is connected to the first connector.

[0017] In one embodiment of the first aspect, the side of the first pole portion facing away from the cover plate along the first direction is a first plane, the side of the first protrusion facing away from the cover plate along the first direction is a second plane, the distance from the first plane to the cover plate is greater than the distance from the second plane to the cover plate, and the first connector is connected to the second plane.

[0018] In one embodiment of the first aspect, the distance from the first plane to the second plane is greater than the dimension of the first connector along the first direction.

[0019] In one embodiment of the first aspect, the battery cell further includes an insulating member, the insulating member including a first insulating portion and a second insulating portion connected to each other, the first insulating portion being disposed between the cover plate and the second electrode post, the second insulating portion being disposed on the side of the cover plate away from the electrode assembly and located on the side of the first insulating portion close to the plate body, the plate body being connected to the first insulating portion.

[0020] In one embodiment of the first aspect, a groove is provided on the side of the first insulating portion away from the cover plate, and a portion of the first pole portion and a portion of the first protrusion portion are located in the groove.

[0021] In one embodiment of the first aspect, the side of the second insulating portion away from the cover plate along the first direction is a third plane, the distance from the third plane to the cover plate is less than the distance from the second plane to the cover plate, and the third plane abuts against the side of the plate body facing the cover plate.

[0022] Secondly, embodiments of this application provide a battery pack including the battery cells described in any of the embodiments of the first aspect above.

[0023] The beneficial effects of this application are as follows:

[0024] The battery cell provided in this application has an explosion-proof valve mounted on the housing, and the circuit board located on the side of the cover plate away from the electrode assembly along a first direction, and electrically connected to the first and second terminals on the cover plate. This design ensures the circuit board is electrically connected to the electrode assembly and keeps the circuit board and explosion-proof valve far apart, thereby reducing interference from the explosion-proof valve and improving the reliability and stability of the circuit board.

[0025] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 An exploded structural diagram of a battery cell in one embodiment of this application is shown;

[0028] Figure 2 This paper shows a schematic diagram of the assembly structure of a single battery cell from one perspective in one embodiment of this application;

[0029] Figure 3 It shows Figure 2 Schematic diagram of the cross-sectional structure at point AA;

[0030] Figure 4 It shows Figure 3 A magnified structural diagram of region B in the middle;

[0031] Figure 5 This illustration shows a schematic diagram of the assembly structure of a first pole, a second pole, a cover plate, an insulating component, and a circuit board in one embodiment of this application.

[0032] Figure 6 This illustration shows a schematic diagram of the assembly structure of the first pole post, the second pole post, the cover plate, and the insulating component from one perspective in one embodiment of this application.

[0033] Figure 7 It shows Figure 6 A schematic diagram of the decomposed structure;

[0034] Figure 8 This illustration shows a schematic diagram of the assembly structure of the first pole, the second pole, the cover plate, and the insulating component from another perspective in one embodiment of this application.

[0035] Figure 9 It shows Figure 8 A schematic diagram of the cross-sectional structure at the CC section;

[0036] Figure 10 It shows Figure 9 A magnified structural diagram of region D in the middle.

[0037] Explanation of key component symbols:

[0038] 1000-Battery cell; 100-Housing shell; 110-Receiving cavity; 120-Side wall; 130-Bottom wall; 200-Cover plate; 210-Positioning hole; 300-Electrode assembly; 400-First electrode post; 410-First electrode post body; 420-Second electrode post body; 421-First electrode post portion; 4211-First plane; 422-First protrusion; 4221-Second plane; 4222-Limiting surface; 500-Explosion-proof valve; 600-Circuit board; 6 10-Plate body; 620-First connector; 630-Second connector; 700-Insulating component; 710-Avoidance notch; 720-First insulating part; 721-Groove; 730-Second insulating part; 731-Third plane; 740-Third insulating part; 800-Second pole; 810-Third pole body; 820-Fourth pole body; 821-Second pole part; 822-Second protrusion; Z-First direction; X-Second direction; Y-Third direction. Detailed Implementation

[0039] The embodiments of this application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0040] In the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] Furthermore, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Moreover, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0042] In the description of this application, the terms "first," "second," etc., are used to distinguish different objects and should not be construed as indicating or implying a specific order or hierarchy, or implicitly specifying the number of technical features indicated. Therefore, a feature marked "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] In the description of this application, the term "and / or" indicates that three relationships can exist. For example, A and / or B can represent three cases: A alone, A and B simultaneously, and B alone. Additionally, the character " / " generally indicates that the preceding and following objects have an "or" relationship.

[0045] In the description of this application, "parallel" includes not only the case of absolute parallelism, but also the case of approximate parallelism as commonly understood in engineering; similarly, "perpendicular" also includes not only the case of absolute perpendicularity, but also the case of approximate perpendicularity as commonly understood in engineering. For example, if the angle between two directions is 80° to 90°, the two directions can be considered perpendicular; if the angle between two directions is 0° to 10°, the two directions can be considered parallel.

[0046] Battery cells employing intelligent technology typically incorporate circuit boards to acquire data throughout the cell's lifecycle, such as current, voltage, and temperature, thereby predicting and mitigating potential safety and reliability risks. However, the existing explosion-proof valves within the battery cells can interfere with the normal operation of the circuit board when performing their venting function, impacting its reliability and stability. Furthermore, during the assembly of multiple battery cells into a battery pack, the terminals of the battery cells need to be welded to the busbar to enable series or parallel connections between adjacent cells. The presence of the circuit board can easily interfere with the welding of the busbar and terminals, affecting the stability and reliability of this connection.

[0047] It should be noted that the venting function of the aforementioned explosion-proof valve refers to the fact that when the pressure inside the casing of a battery cell exceeds a threshold, the explosion-proof valve can open to release the high-temperature and high-pressure gas generated inside the casing.

[0048] like Figure 1 and Figure 2 As shown, in a first aspect, embodiments of this application provide a battery cell 1000, relating to the field of battery technology, primarily used in battery packs for application in electrical devices or energy storage devices. Of course, the battery cell 1000 can also be directly applied to electrical devices or energy storage devices without using a battery pack; therefore, no specific limitations are placed on the application scenarios of the battery cell 1000.

[0049] For example, electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools. Vehicles can be gasoline-powered cars, natural gas-powered cars, and new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, and range-extended electric vehicles; spacecraft can be drones, airplanes, rockets, space shuttles, and spacecraft; electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; power tools can be 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; energy storage devices can be energy storage containers and energy storage power stations. No specific restrictions are placed on the types of electrical devices and energy storage devices here.

[0050] like Figures 1 to 3 As shown, the battery cell 1000 provided in this embodiment includes: a housing 100, a cover plate 200, an electrode assembly 300, a first electrode post 400, a second electrode post 800, an explosion-proof valve 500, and a circuit board 600.

[0051] The housing 100 has a receiving cavity 110; a cover plate 200 is connected to the housing 100 to cover the receiving cavity 110; an electrode assembly 300 is disposed in the receiving cavity 110; a first electrode post 400 is disposed through the cover plate 200 and is electrically connected to the electrode assembly 300; a second electrode post 800 is disposed through the cover plate 200 and is electrically connected to the electrode assembly 300; an explosion-proof valve 500 is disposed on the housing 100; a circuit board 600 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, and the circuit board 600 is electrically connected to the first electrode post 400 and the second electrode post 800.

[0052] For example, the first terminal 400 is a negative terminal and the second terminal 800 is a positive terminal. Of course, the first terminal 400 can also be a positive terminal and the second terminal 800 a negative terminal. No specific restrictions are placed on the types of the first terminal 400 and the second terminal 800 here.

[0053] It should be noted that the role of the circuit board 600 in the battery cell 1000 is to serve as a mounting carrier for various sensors. That is, the circuit board 600 integrates various sensors, such as current sensors, voltage sensors, and temperature sensors, in order to acquire data of the battery cell 1000 throughout its entire life cycle. No specific limitations are made on the structure and integrated functions of the circuit board 600 here.

[0054] For example, circuit board 600 can be a printed circuit board (PCB), a flexible printed circuit board (FPC), etc., and no specific limitation is made on the type of circuit board 600 here.

[0055] It is understood that in the battery cell 1000 provided in this embodiment, since the explosion-proof valve 500 is disposed on the housing 100, the circuit board 600 is located on the side of the cover plate 200 away from the explosion-proof valve 500 along the first direction Z, and is electrically connected to the first electrode post 400 and the second electrode post 800 on the cover plate 200. This ensures that the circuit board 600 is electrically connected to the electrode assembly 300, and keeps the circuit board 600 and the explosion-proof valve 500 far apart, thereby reducing the interference of the explosion-proof valve 500 on the circuit board 600 and improving the reliability and stability of the circuit board 600.

[0056] like Figure 3 As shown, in one embodiment, the cover plate 200 and the explosion-proof valve 500 are arranged opposite each other along the first direction Z.

[0057] Understandably, since the explosion-proof valve 500 is mounted on the housing 100 and is positioned opposite the cover plate 200 along the first direction Z, while the circuit board 600 is located on the side of the cover plate 200 away from the explosion-proof valve 500 along the first direction Z, this maximizes the distance between the circuit board 600 and the explosion-proof valve 500, thereby more effectively reducing the interference of the explosion-proof valve 500 on the circuit board 600 and improving the reliability and stability of the circuit board 600.

[0058] like Figures 3 to 5 As shown, in one embodiment, the circuit board 600 includes a first connector 620, a board body 610, and a second connector 630 connected in sequence. The board body 610 is located between the first terminal 400 and the second terminal 800. The first connector 620 is connected to the first terminal 400, and the second connector 630 is connected to the second terminal 800, so as to realize the electrical connection between the circuit board 600 and the first terminal 400 and the second terminal 800.

[0059] It should be noted that "the circuit board 600 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, and the circuit board 600 includes the first connector 620, the board body 610 and the second connector 630 connected in sequence" can be understood as: the entire circuit board 600 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, that is, the board body 610, the first connector 620 and the second connector 630 of the circuit board 600 are all located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z.

[0060] It should be noted that the first connector 620 and the second connector 630 are conductive. For example, the material of the first connector 620 and / or the material of the second connector 630 can be a metallic conductive material (such as nickel, copper, aluminum, silver, alloy, etc.) or a non-metallic conductive material (such as graphite, silicon, etc.), and no specific restrictions are made here.

[0061] like Figures 2 to 4 As shown, in a specific embodiment, the first electrode post 400 includes a first electrode post body 410 and a second electrode post body 420. The first electrode post body 410 is disposed through the cover plate 200 and is electrically connected to the electrode assembly 300. The second electrode post body 420 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z. The second electrode post body 420 includes a first electrode post portion 421 and a first protrusion 422 connected to each other. The first electrode post portion 421 is connected to the first electrode post body 410. The first protrusion 422 is located on the side of the first electrode post portion 421 close to the plate body 610, and the first protrusion 422 is connected to the first connector 620.

[0062] It should be noted that "the second pole piece 420 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, and the second pole piece 420 includes a first pole piece portion 421 and a first protrusion portion 422 connected to each other" can be understood as: the entire second pole piece 420 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, that is, the first pole piece portion 421 and the first protrusion portion 422 of the second pole piece 420 are both located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z.

[0063] Understandably, during the assembly of multiple battery cells 1000 into a battery pack, the first terminal 400 needs to be welded to the busbar. The aforementioned first terminal portion 421 facilitates the welding of the first terminal 400 to the busbar, and the aforementioned first protrusion 422 facilitates the connection of the first terminal 400 to the first connector 620, thus not affecting the original welding area between the first terminal 400 and the busbar, thereby reducing the impact of the circuit board 600 on the reliability and stability of the welded busbar.

[0064] like Figure 4 as well as Figures 8 to 9 As shown, further, the side of the first pole post 421 facing away from the cover plate 200 along the first direction Z is the first plane 4211, and the side of the first protrusion 422 facing away from the cover plate 200 along the first direction Z is the second plane 4221. The distance H1 from the first plane 4211 to the cover plate 200 is greater than the distance H2 from the second plane 4221 to the cover plate 200. The first connector 620 is connected to the second plane 4221.

[0065] For example, the connection between the first connector 620 and the second plane 4221 can be selected by welding, screw connection, snap-fit, quick-release connection, etc., without specific limitations.

[0066] Understandably, when welding the busbar, the busbar is welded to the first plane 4211. Since the distance from the first plane 4211 to the cover plate 200 is greater than the distance from the second plane 4221 to the cover plate 200, the first pole portion 421 and the first protrusion 422 form a stepped structure, thereby reducing the size of the first connector 620 protruding from the first pole portion 421 along the first direction Z. This improves the interference of the circuit board 600 when welding the first pole 400 to the busbar, thereby improving the stability and reliability of the welding between the busbar and the first pole 400.

[0067] like Figure 4 As shown, further, the distance H3 from the first plane 4211 to the second plane 4221 is greater than the dimension H4 of the first connector 620 along the first direction Z.

[0068] Understandably, since the distance between the first plane 4211 and the second plane 4221 is greater than the dimension of the first connector 620 along the first direction Z, the first connector 620 can not protrude from the first pole portion 421 in the first direction Z, thereby maximizing the reduction of interference between the circuit board 600 and the first pole 400 when soldering to the busbar.

[0069] like Figures 2 to 4 As shown, the battery cell 1000 further includes an insulating member 700, which includes a first insulating portion 720 and a second insulating portion 730 connected to each other. The first insulating portion 720 is disposed between the cover plate 200 and the second electrode post 420 to insulate the cover plate 200 and the second electrode post 420 from each other. The second insulating portion 730 is disposed on the side of the cover plate 200 away from the electrode assembly 300 and is located on the side of the first insulating portion 720 near the plate body 610. The plate body 610 is connected to the first insulating portion 720, that is, the second insulating portion 730 is located between the cover plate 200 and the plate body 610 to insulate the circuit board 600 and the cover plate 200 from each other. In this way, the possibility of short circuit in the battery cell 1000 can be reduced, thereby improving the safety of the battery cell 1000.

[0070] It should be noted that "the first insulating part 720 is disposed between the cover plate 200 and the second pole piece 420" can be understood as: the first insulating part 720 is disposed between the cover plate 200 and the first pole piece 421, and is also disposed between the cover plate 200 and the first protrusion 422, that is, the first insulating part 720 is present between the cover plate 200 and the first pole piece 421 and between the cover plate 200 and the first protrusion 422.

[0071] like Figures 5 to 7 As shown, further, the second insulating part 730 is provided with an avoidance notch 710.

[0072] It is understandable that by avoiding the gap 710, the circuit board 600 can be avoided, thereby reducing the size of the battery cell 1000 in the first direction Z, increasing space utilization, and thus improving the energy density of the battery cell 1000.

[0073] like Figure 7 As shown, further, a plurality of positioning parts are provided on the side of the first insulating part 720 near the cover plate 200, and a plurality of positioning holes 210 are provided on the side of the cover plate 200 away from the electrode assembly 300. Each positioning part is provided through a positioning hole 210, which can increase the connection strength between the first insulating part 720 and the cover plate 200.

[0074] like Figures 2 to 4As shown, the insulating component 700 further includes a third insulating portion 740, which is disposed between the first electrode post 410 and the cover plate 200 to insulate the cover plate 200 and the first electrode post 410 from each other, thereby further reducing the possibility of short circuit in the battery cell 1000.

[0075] like Figures 5 to 7 As shown, further, the first insulating portion 720 has a groove 721 on the side opposite to the cover plate 200. A portion of the first pole post 421 and a portion of the first protrusion 422 are located in the groove 721, and the second insulating portion 730 protrudes from the bottom of the groove 721 along the first direction Z. In this way, the first insulating portion 720 can surround the outer periphery of the second pole post 420, thereby achieving a better insulation effect.

[0076] like Figure 4 and Figure 10 As shown, further, the side of the second insulating part 730 away from the cover plate 200 along the first direction Z is the third plane 731 (i.e. the bottom wall of the above-mentioned clearance notch 710). The distance H5 from the third plane 731 to the cover plate 200 is less than the distance H2 from the second plane 4221 to the cover plate 200. The third plane 731 abuts against the side of the plate 610 facing the cover plate 200.

[0077] Understandably, because the distance from the third plane 731 to the cover plate 200 is less than the distance from the second plane 4221 to the cover plate 200, the first protrusion 422 and the second insulating portion 730 form a stepped structure. Based on this, the third plane 731 abuts against the side of the plate 610 facing the cover plate 200. This allows the second insulating portion 730 to stably support the plate 610, thereby reducing the risk of the first connector 620 breaking when the circuit board 600 is subjected to impact and vibration, and thus improving the reliability and stability of the circuit board 600.

[0078] like Figure 1 , Figure 4 and Figure 10 As shown, in a specific embodiment, the battery cell 1000 has a second direction X intersecting the first direction Z, and the first protrusion 422 is a limiting surface 4222 on the side of the plate 610 along the second direction X. The limiting surface 4222 and the plate 610 are spaced apart along the second direction X.

[0079] It is understandable that when the circuit board 600 is installed on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, the limiting surface 4222 can limit the board body 610 in the first direction Z, thereby facilitating the operation of the installer and improving the installation efficiency of the circuit board 600.

[0080] like Figures 1 to 3 as well as Figure 7 As shown, in a specific embodiment, the second electrode post 800 includes a third electrode post 810 and a fourth electrode post 820. The third electrode post 810 is disposed through the cover plate 200 and electrically connected to the electrode assembly 300. The fourth electrode post 820 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z. The fourth electrode post 820 includes a second electrode post portion 821 and a second protrusion portion 822 connected to each other. The second electrode post portion 821 is connected to the third electrode post 810, and the second protrusion portion 822 is connected to the second connector 630. The second protrusion portion 822 and the first protrusion portion 422 are spaced apart.

[0081] It should be noted that "the fourth pole piece 820 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, and the fourth pole piece 820 includes a connected second pole piece portion 821 and a second protrusion portion 822" can be understood as: the entire fourth pole piece 820 is located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z, that is, the second pole piece portion 821 and the second protrusion portion 822 of the fourth pole piece 820 are both located on the side of the cover plate 200 away from the electrode assembly 300 along the first direction Z.

[0082] Understandably, during the assembly of multiple battery cells 1000 into a battery pack, the second terminal 800 needs to be soldered to the busbar. The aforementioned second terminal portion 821 facilitates the soldering of the second terminal 800 to the busbar, and the aforementioned second protrusion 822 facilitates the connection of the second terminal 800 to the second connector 630, thus not affecting the original soldering area between the second terminal 800 and the busbar, thereby reducing the impact of the circuit board 600 on the reliability and stability of the soldered busbar.

[0083] It should be understood that the connection structure between the first connector 620 and the first pole 400, as well as the structure of the insulating member 700 in any of the above embodiments, are equally applicable to the second connector 630 and the second pole 800, and will not be described in detail here.

[0084] like Figure 1 and Figure 2 As shown, in one embodiment, the battery cell 1000 has a length direction, a width direction, and a height direction that are perpendicular to each other. The length direction is the second direction X, the width direction is the third direction Y, and the height direction is the first direction Z. The housing 100 includes a side wall 120 and a bottom wall 130 connected to each other. The side wall 120 and the bottom wall 130 together define a receiving cavity 110. The cover plate 200 is connected to the side wall 120, and the cover plate 200 and the bottom wall 130 are arranged opposite to each other along the first direction Z. The explosion-proof valve 500 is disposed on the bottom wall 130.

[0085] Of course, in the above embodiment, the explosion-proof valve 500 can also be disposed on the side wall 120 of the housing 100, which can also keep the explosion-proof valve 500 and the circuit board 600 away from each other. Here, no specific restrictions are made on the position of the explosion-proof valve 500 on the housing 100.

[0086] Secondly, embodiments of this application provide a battery pack including the battery cell 1000 in any of the embodiments of the first aspect described above.

[0087] It is understood that since the battery pack provided in this embodiment has the battery cell 1000 in any of the embodiments of the first aspect, it has all the beneficial effects of the battery cell 1000, which will not be described in detail here.

[0088] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0089] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A battery cell, characterized in that, Having a first orientation (Z), the battery cell includes: The housing (100) has a receiving cavity (110); A cover plate (200) is connected to the housing (100) to seal the receiving cavity (110); An electrode assembly (300) is disposed within the receiving cavity (110); The first electrode post (400) is disposed through the cover plate (200) and electrically connected to the electrode assembly (300); The second electrode post (800) is disposed through the cover plate (200) and electrically connected to the electrode assembly (300); An explosion-proof valve (500) is disposed on the housing (100); A circuit board (600) is located on the side of the cover plate (200) facing away from the electrode assembly (300) along the first direction (Z) and is electrically connected to the first electrode post (400) and the second electrode post (800).

2. The battery cell according to claim 1, characterized in that, The cover plate (200) and the explosion-proof valve (500) are arranged opposite to each other along the first direction (Z).

3. The battery cell according to claim 1, characterized in that, The circuit board (600) includes a first connector (620), a board body (610), and a second connector (630) connected in sequence. The board body (610) is located between the first pole (400) and the second pole (800). The first connector (620) is connected to the first pole (400), and the second connector (630) is connected to the second pole (800).

4. The battery cell according to claim 3, characterized in that, The first electrode post (400) includes a first electrode post body (410) and a second electrode post body (420). The first electrode post body (410) is disposed through the cover plate (200) and electrically connected to the electrode assembly (300). The second electrode post body (420) is located on the side of the cover plate (200) away from the electrode assembly (300) along the first direction (Z). The second electrode post body (420) includes a first electrode post portion (421) and a first protrusion (422) connected to each other. The first electrode post portion (421) is connected to the first electrode post body (410). The first protrusion (422) is located on the side of the first electrode post portion (421) near the plate body (610) and is connected to the first connector (620).

5. The battery cell according to claim 4, characterized in that, The first pole post (421) has a first plane (4211) on the side away from the cover plate (200) along the first direction (Z), and the first protrusion (422) has a second plane (4221) on the side away from the cover plate (200) along the first direction (Z). The distance from the first plane (4211) to the cover plate (200) is greater than the distance from the second plane (4221) to the cover plate (200). The first connector (620) is connected to the second plane (4221).

6. The battery cell according to claim 5, characterized in that, The distance from the first plane (4211) to the second plane (4221) is greater than the dimension of the first connector (620) along the first direction (Z).

7. The battery cell according to claim 5, characterized in that, The battery cell also includes an insulating component (700), which includes a first insulating portion (720) and a second insulating portion (730) connected to each other. The first insulating portion (720) is disposed between the cover plate (200) and the second electrode post (420), and the second insulating portion (730) is disposed on the side of the cover plate (200) away from the electrode assembly (300) and on the side of the first insulating portion (720) close to the plate body (610). The plate body (610) is connected to the first insulating portion (720).

8. The battery cell according to claim 7, characterized in that, The first insulating part (720) has a groove (721) on the side opposite to the cover plate (200), and a part of the first pole post (421) and a part of the first protrusion (422) are located in the groove (721).

9. The battery cell according to claim 7, characterized in that, The second insulating part (730) has a third plane (731) on the side away from the cover plate (200) along the first direction (Z). The distance from the third plane (731) to the cover plate (200) is less than the distance from the second plane (4221) to the cover plate (200). The third plane (731) abuts against the side of the plate body (610) facing the cover plate (200).

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

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