Battery, battery cell, and electric device

Abstract

A battery (1100), a battery cell (10), and an electric device. The battery comprises a battery unit (1) and a sampling assembly (2). The battery unit (1) comprises a plurality of columns of battery cells (10) arranged in a first direction, and each column of battery cells (10) comprises a plurality of battery cells (10) arranged in a second direction. Each battery cell (10) is provided with a pressure relief mechanism (12), electrode terminals (13), and a first side wall (1111) in a third direction, and the electrode terminals (13) comprise a first electrode terminal (131) and a second electrode terminal (132) having different polarities. The first electrode terminal (131), the second electrode terminal (132), and the pressure relief mechanism (12) are arranged at intervals on the first side wall (1111) in the first direction, and the second electrode terminal (132) is located between the first electrode terminal (131) and the pressure relief mechanism (12); or the first electrode terminal (131) and the second electrode terminal (132) are spaced apart from each other on the first side wall (1111) in the first direction, and the pressure relief mechanism (12) is arranged on another side wall of the battery cell (10), wherein the first direction intersects with the second direction, and a third direction is perpendicular to the first direction and the second direction. The sampling assembly (2) comprises electrical connection members (21) and sampling members (22) used for being electrically connected to the electrical connection members (21), the electrode terminals (13) of two adjacent battery cells (10) are connected by means of the electrical connection members (21), and a sampling member (22) is provided between the electrode terminals (13) of every two adjacent columns of battery cells (10).

Description

Batteries, battery cells and electrical devices

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 21, 2024, with application number 202420558716.2 and invention name “Battery, Battery Cell and Electrical Device”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application belongs to the field of battery sampling technology, and in particular relates to a battery, a battery cell and an electrical device. Background Art

[0003] Energy conservation and emission reduction are crucial to the sustainable development of the automotive industry. Against this backdrop, electric vehicles, due to their energy-saving and environmentally friendly characteristics, have become a core component of the industry's sustainable development. However, battery technology is a key factor influencing the development of electric vehicles.

[0004] A battery usually includes multiple battery cells. In order to understand the operating status of each battery cell, a column of battery cells can be connected to a sampling piece in a sampling assembly to obtain the operating data of each battery cell. However, the cost of the sampling piece is high. When multiple columns of battery cells are provided, the number of sampling pieces is large, resulting in high battery production costs.

[0005] The above statements are only used to provide background information related to the present application and do not necessarily constitute prior art.

[0006] Application Contents

[0007] The purpose of the embodiments of the present application is to provide a battery, a battery cell and an electrical device, including but not limited to solving the problems of a large number of sampling parts and high battery costs in the related art.

[0008] The technical solution adopted in the embodiment of this application is:

[0009] In a first aspect, a battery is provided, which includes a battery unit and a sampling assembly, the battery unit including a plurality of columns of battery cells arranged along a first direction, each column of battery cells including a plurality of battery cells arranged along a second direction; the battery cell has a pressure relief mechanism, an electrode terminal and a first side wall along a third direction, the electrode terminal including a first electrode terminal and a second electrode terminal with different polarities; the first electrode terminal, the second electrode terminal and the pressure relief mechanism are arranged at intervals on the first side wall along the first direction, and the second electrode terminal is located between the first electrode terminal and the pressure relief mechanism; or, the first electrode terminal and the second electrode terminal are arranged at intervals on the first side wall along the first direction, and the pressure relief mechanism is arranged on the other side wall of the battery unit; wherein the first direction and the second direction intersect, and the third direction is perpendicular to the first direction and the second direction; the sampling assembly includes an electrical connector and a sampling member for electrically connecting to the electrical connector, the electrode terminals of two adjacent battery cells are connected by the electrical connector, and a sampling member is provided between the electrode terminals of each two adjacent columns of battery cells.

[0010] In the battery of the embodiment of the present application, since the second electrode terminal of the battery cell is located between the first electrode terminal and the pressure relief mechanism, or the first electrode terminal and the second electrode terminal are located on the first side wall of the battery cell and the pressure relief mechanism is located on the other side wall of the battery cell, the spacing between the first electrode terminal and the second electrode terminal can be set to be smaller, thereby reducing the distance between the electrical connector and the sampling member and reducing the sampling distance of the sampling member; therefore, two columns of battery cells can share one sampling member, thereby reducing the number of sampling members and lowering the manufacturing cost of the battery.

[0011] In some embodiments, in the same column of battery cells, two adjacent battery cells are respectively a first battery cell and a second battery cell, the second electrode terminal of the first battery cell is arranged opposite to the second electrode terminal of the second battery cell, the first electrode terminal of the first battery cell is located on one side of the second electrode terminal of the first battery cell, and the first electrode terminal of the second battery cell is located on the other side of the second electrode terminal of the first battery cell.

[0012] By adopting the technical solution of this embodiment, the second electrode terminal of the first battery cell and the second electrode terminal of the second battery cell are arranged relative to each other, so that the distance between the electrical connector connected to the second electrode terminal and the sampling component is closer, which reduces the sampling distance of the sampling component and facilitates two adjacent columns of battery cells to share one sampling component.

[0013] In some embodiments, the electrical connector is connected to the sampling member at an end close to the sampling member.

[0014] By adopting the technical solution of this embodiment, the wiring distance and sampling distance between the electrical connector and the sampling component can be reduced, and the sampling wiring distance and sampling distance can be reduced.

[0015] In some embodiments, the second electrode terminal is located in the middle of the first side wall in the first direction.

[0016] By adopting the technical solution of this embodiment, the battery units can use battery cells of the same type, which is beneficial to reducing production costs.

[0017] In some embodiments, in the same column of battery cells, two adjacent battery cells are respectively a first battery cell and a second battery cell, the first electrode terminal of the first battery cell is arranged opposite to the second electrode terminal of the second battery cell, and the second electrode terminal of the first battery cell is arranged opposite to the first electrode terminal of the second battery cell.

[0018] By adopting the technical solution of this embodiment, the electrode terminals of the battery cells are arranged in a regular manner, which facilitates the installation of electrical connectors.

[0019] In some embodiments, the first electrode terminal and the second electrode terminal are symmetrically arranged about a bisector of the first sidewall in the first direction.

[0020] By adopting the technical solution of this embodiment, the battery units can use battery cells of the same type, which is beneficial to reducing production costs.

[0021] In some embodiments, in the same column of battery cells, two adjacent battery cells are respectively a first battery cell and a second battery cell, and the electrode terminal of the first battery cell and the electrode terminal of the second battery cell are arranged close to the sampling piece; the first electrode terminal of the first battery cell is arranged opposite to the first electrode terminal of the second battery cell, and the second electrode terminal of the second battery cell is arranged opposite to the second electrode terminal of the second battery cell.

[0022] By adopting the technical solution of this embodiment, the electrode terminals of the battery cells are arranged in a regular manner, which facilitates the installation of electrical connectors.

[0023] In some embodiments, the polarity of the first electrode terminal of the first battery cell and the polarity of the first electrode terminal of the second battery cell are the same; or, the polarity of the first electrode terminal of the first battery cell and the polarity of the first electrode terminal of the second battery cell are different.

[0024] By adopting the technical solution of this embodiment, different battery cells can be flexibly selected for the battery cells, so as to facilitate the connection of the electrical connectors and reduce the manufacturing cost of the battery.

[0025] In some embodiments, the first side wall has a first side edge and a second side edge spaced apart along a first direction, and the first electrode terminal is located between the second electrode terminal and the first side edge; the spacing between the first side edge and the second side edge is L, and the distance between the second electrode terminal and the first side edge is L1, wherein 0.2≤L1 / L≤0.5.

[0026] By adopting the technical solution of this embodiment, it is beneficial to reduce the sampling distance and also reduce the short circuit risk of the battery cell.

[0027] In some embodiments, 0.35≤L1 / L≤0.45.

[0028] By adopting the technical solution of this embodiment, the sampling distance can be better reduced, and the short circuit risk of the battery cell can also be better reduced.

[0029] In some embodiments, the pressure relief mechanism is provided on the first side wall, the second electrode terminal is located between the first electrode terminal and the pressure relief mechanism, the first side wall has a first side edge and a second side edge spaced apart along a first direction, and the first electrode terminal is located between the second electrode terminal and the first side edge; the spacing between the first side edge and the second side edge is L, and the distance between the second electrode terminal and the pressure relief mechanism is L2, wherein 0.5≤L2 / L≤2 / 3.

[0030] By adopting the technical solution of this embodiment, the risk of electrical overlap between the electrical connector and the first side wall can be reduced, and the risk of short circuit of the battery cell can also be reduced, which is conducive to improving the reliability of the battery.

[0031] In some embodiments, 0.55≤L2 / L≤0.65.

[0032] By adopting the technical solution of this embodiment, the risk of electrical overlap between the electrical connector and the first side wall can be better reduced, and the risk of short circuit of the battery cell can be better reduced, which is conducive to improving the reliability of the battery.

[0033] In some embodiments, the pressure relief mechanism is provided on the first side wall, the second electrode terminal is located between the first electrode terminal and the pressure relief mechanism, and in the same column of battery cells, the pressure relief mechanisms of the battery cells are staggered.

[0034] By adopting the technical solution of this embodiment, the pressure relief mechanisms are staggered, which can increase the distance between the pressure relief mechanisms of two adjacent battery cells. This can reduce the impact of high temperature shock and ejected particles after the pressure relief mechanisms are opened on the pressure relief mechanisms of adjacent battery cells, reduce the risk of melting through the pressure relief mechanisms of adjacent battery cells, and help improve the reliability of the battery cells.

[0035] In some embodiments, multiple battery cells are connected in series via electrical connectors.

[0036] By adopting the technical solution of this embodiment, the battery cells are connected in series, and the electrical connection operation between the battery cells is simple, which is conducive to reducing the production cost of the battery cells.

[0037] In some embodiments, the sampling member extends along the second direction.

[0038] By adopting the technical solution of this embodiment, the sampling member and the battery cells in two adjacent columns of battery cells can be arranged correspondingly, which is beneficial to reducing the connection distance between the electrical connector and the sampling member.

[0039] In some embodiments, the sampling member includes at least one of a flexible circuit board and a rigid circuit board.

[0040] By adopting the technical solution of this embodiment, different types of sampling pieces can be selected according to actual conditions, making the arrangement of the sampling pieces more flexible and more practical.

[0041] In some embodiments, the battery cell has a second side wall disposed opposite to the first side wall, and the second side wall is provided with a pressure relief mechanism.

[0042] By adopting the technical solution of this embodiment, the pressure relief mechanism is arranged on the second side wall, so that the particulate matter ejected when the pressure relief mechanism of the second side wall is opened is not easy to come into contact with the electrical connector, the electrode terminal and the sampling piece, thereby reducing the risk of damage to the electrical connector, the electrode terminal and the sampling piece, and is conducive to improving the reliability of the battery.

[0043] In some embodiments, the battery cell is provided with a temperature sensor for acquiring temperature information, and the temperature sensor is connected to the sampling component.

[0044] By adopting the technical solution of this embodiment, the sampling element cooperates with the temperature sensor to obtain the temperature signal of the battery cell, so as to facilitate more comprehensive monitoring of the operating status of the battery cell, which is conducive to improving the reliability of the battery.

[0045] In a second aspect, a battery cell is provided, which includes a shell and an electrode assembly, the shell having a first side wall, the first side wall being provided with a pressure relief mechanism and a first electrode terminal and a second electrode terminal with different polarities, the second electrode terminal being located between the first electrode terminal and the pressure relief mechanism; the electrode assembly is located in the shell, and the first electrode terminal and the second electrode terminal are electrically connected to the electrode assembly to realize the input and output of electrical energy.

[0046] In the battery cell of the embodiment of the present application, the second electrode terminal is located between the pressure relief mechanism and the first electrode terminal, so that the distance between the first electrode terminal and the second electrode terminal can be set to be smaller, so as to facilitate two adjacent columns of battery cells to share a sampling piece, thereby reducing the production cost of the battery.

[0047] In a third aspect, an electrical device is provided, the electrical device comprising the battery as described in the above embodiment; and / or the battery cell as described in the above embodiment.

[0048] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0050] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0051] FIG2 is a schematic diagram of an exploded view of a battery provided in some embodiments of the present application.

[0052] FIG3 is a schematic structural diagram of batteries provided in other embodiments of the present application.

[0053] FIG4 is a schematic structural diagram of the battery cell in FIG3 .

[0054] FIG5 is a schematic structural diagram of a battery cell provided in some embodiments of the present application.

[0055] FIG. 6 is an exploded schematic diagram of the battery cell in FIG. 5 .

[0056] FIG7 is a schematic structural diagram of batteries provided in some other embodiments of the present application.

[0057] FIG8 is a schematic structural diagram of the battery cell in FIG7 .

[0058] FIG9 is a schematic structural diagram of batteries provided in some other embodiments of the present application.

[0059] FIG10 is a schematic structural diagram of the battery cell in FIG9 .

[0060] FIG11 is a schematic structural diagram of batteries provided in some other embodiments of the present application.

[0061] FIG12 is a schematic structural diagram of the battery cell in FIG11 .

[0062] FIG13 is a schematic structural diagram of batteries provided in some other embodiments of the present application.

[0063] Among them, the reference numerals in the figures are:

[0064] 1000, vehicle; 1100, battery; 1200, controller; 1300, motor; 1, battery unit; 10, battery cell; 10a, first battery cell; 10b, second battery cell; 11, outer shell; 111, end cover; 1111, first side wall; 11111, first side edge; 11112, second side edge; 112, shell; 1121, second side wall; 12, pressure relief mechanism; 13, electrode terminal; 131, first electrode terminal; 132, second electrode terminal; 14, electrode assembly; 141, tab; 15, temperature sensor; 2, sampling assembly; 21, electrical connector; 22, sampling component; 3, box; 31, first part; 32, second part; 4, battery management module. DETAILED DESCRIPTION

[0065] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0067] In the description of the embodiments of this application, the technical terms "first," "second," etc., are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance, or to implicitly specify the quantity, specific order, or primary-secondary relationship of the technical features indicated. Therefore, a feature designated "first" or "second" may explicitly or implicitly include one or more of such features.

[0068] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least some embodiments of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments in any suitable manner.

[0069] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0070] In the description of the embodiments of this application, the term "plurality" refers to two or more (including two). Similarly, "multiple groups" refers to two or more (including two groups), and "multiple sheets" refers to two or more (including two sheets). "Several" means one or more, unless otherwise specifically defined.

[0071] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the embodiments of the present application.

[0072] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0073] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0074] Currently, market developments indicate that batteries are becoming increasingly widely used. Batteries are not only used in energy storage systems such as hydropower, thermal, wind, and solar power plants, but are also widely used in electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application of power batteries continues to expand, market demand is also growing.

[0075] Energy conservation and emission reduction are crucial to the sustainable development of the automotive industry. Against this backdrop, electric vehicles, due to their energy-saving and environmentally friendly characteristics, have become a core component of the industry's sustainable development. However, battery technology is a key factor influencing the development of electric vehicles.

[0076] A battery typically includes a sampling assembly and multiple battery cells. The side walls of the battery cells are provided with a first electrode terminal, a second electrode terminal, and a pressure relief mechanism. The first electrode terminal and the second electrode terminal are used to electrically connect to the electrical connector in the sampling assembly to achieve electrical connection between the multiple battery cells. The pressure relief mechanism is used to release the pressure inside the battery cell to improve the reliability of the battery. However, the pressure relief mechanism is provided between the first electrode terminal and the second electrode terminal, resulting in a large distance between the first electrode terminal and the second electrode terminal.

[0077] In order to understand the operating status of each battery cell, the sampling component of the sampling assembly is usually electrically connected to the electrical connector to obtain the electrical signal of each battery cell. Usually, one sampling component is connected to each column of battery cells. This is mainly because the distance between the first electrode terminal and the second electrode terminal is large. If two columns of battery cells share one sampling component, the distance between the sampling component and the electrical connector is far, resulting in a long sampling distance for the sampling component.

[0078] However, the cost of the sampling piece is high. When multiple rows of battery cells are provided, more sampling pieces need to be provided, resulting in higher battery cost.

[0079] Based on the above considerations, in order to reduce the manufacturing cost of the battery, an embodiment of the present application provides a battery, which includes a battery unit and a sampling assembly, the battery unit including a plurality of columns of battery cells arranged along a first direction, each column of battery cells including a plurality of battery cells arranged along a second direction; the battery cell has a pressure relief mechanism, an electrode terminal and a first side wall along a third direction, the electrode terminal including a first electrode terminal and a second electrode terminal with different polarities; the first electrode terminal, the second electrode terminal and the pressure relief mechanism are arranged at intervals on the first side wall along the first direction, and the second electrode terminal is located between the first electrode terminal and the pressure relief mechanism; or, the first electrode terminal and the second electrode terminal are arranged at intervals on the first side wall along the first direction, and the pressure relief mechanism is arranged on the other side wall of the battery unit; wherein the first direction and the second direction intersect, and the third direction is perpendicular to the first direction and the second direction; the sampling assembly includes an electrical connector and a sampling member for electrically connecting to the electrical connector, the electrode terminals of two adjacent battery cells are connected by the electrical connector, and a sampling member is provided between the electrode terminals of each two adjacent columns of battery cells.

[0080] In the battery of the embodiment of the present application, since the second electrode terminal of the battery cell is located between the first electrode terminal and the pressure relief mechanism, or the first electrode terminal and the second electrode terminal are located on the first side wall of the battery cell and the pressure relief mechanism is located on the other side wall of the battery cell, the spacing between the first electrode terminal and the second electrode terminal can be set to be smaller, thereby reducing the distance between the electrical connector and the sampling member and reducing the sampling distance of the sampling member; therefore, two columns of battery cells can share one sampling member, reducing the number of sampling members and lowering the production cost of the battery.

[0081] The batteries of the present invention can be widely used in various electronic devices, including mobile phones, laptop computers, electric bicycles, electric cars, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes, and power tools. Batteries are devices that can store and release electrical energy, providing the power required by these electronic devices.

[0082] The electrical device provided in the embodiment of the present application can use the battery of the embodiment of the present application. The battery provides electrical energy to the electrical device. The cost of the battery is low, which can also reduce the manufacturing cost of the electrical device.

[0083] The electrical devices of the embodiments of the present application may be, but are not limited to, vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Electric 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. Electrical devices may also be energy storage devices, such as energy storage containers and energy storage cabinets.

[0084] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0085] Please refer to Figure 1. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1100 is provided inside the vehicle 1000. The battery 1100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 1100 can be used to power the vehicle 1000. For example, the battery 1100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 can also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery 1100 to power the motor 1300, for example, for starting, navigating and driving the vehicle 1000.

[0086] In some embodiments of the present application, the battery 1100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0087] Referring to Figure 2 , battery 1100 includes a housing 3 and a battery cell 1, with the battery cell 1 housed within the housing 3. The housing 3 provides a storage space for the battery cell 1 and can have various structures. In some embodiments, the housing 3 can include a first portion 31 and a second portion 32, which overlap each other and together define a storage space for the battery cell 1. The second portion 32 can be a hollow structure with one end open, and the first portion 31 can be a plate-like structure, with the first portion 31 overlapping the open side of the second portion 32, so that the first and second portions 31, 32 together define a storage space. Alternatively, the first and second portions 31, 32 can each be a hollow structure with one end open, with the open side of the first portion 31 overlapping the open side of the second portion 32. Of course, the housing 3 formed by the first and second portions 31, 32 can have various shapes, such as a cylinder or a rectangular parallelepiped.

[0088] In some embodiments, the number of battery cells 1 can be one or more, and multiple battery cells 1 can be directly connected in series, in parallel, or mixed together and placed in the box 3, where mixed means that multiple battery cells 10 are connected in both series and parallel.

[0089] In some embodiments, the battery unit 1 includes multiple battery cells 10, and the multiple battery cells 10 can be directly connected in series, in parallel, or mixed together, and then the whole formed by the multiple battery cells 10 is accommodated in the box 3; of course, the battery 1100 can also be a battery 1100 module in the form of multiple battery cells 10 that are first connected in series, in parallel, or mixed together, and the multiple battery 1100 modules are then connected in series, in parallel, or mixed together to form a whole and accommodated in the box 3.

[0090] Each battery cell 10 may be a secondary battery 1100 or a primary battery 1100; it may also be a lithium-sulfur battery 1100, a sodium-ion battery 1100, or a magnesium-ion battery 1100, but is not limited thereto. The battery cell 10 may be cylindrical, flat, rectangular, or in other shapes.

[0091] In some embodiments, the battery 1100 also includes a sampling component 2, which is disposed in the box 3. The battery unit 1 includes multiple battery cells 10. The sampling component 2 can connect the multiple battery cells 10 in series, in parallel, or in a mixed manner. At the same time, it can also obtain voltage information, current information, and temperature information of each battery cell 10 to monitor the working status of each battery cell 10 and improve the reliability of the battery 1100.

[0092] In some embodiments, the battery 1100 also includes a battery management module 4 (for example, a battery management system (BMS)). The battery management module 4 is disposed in the housing 3. The battery management module 4 can be electrically connected to the sampling component 2, so that the battery management module 4 can collect voltage information, current information, temperature information and other information collected by the sampling component 2 to realize monitoring of the battery 1100; the battery management module 4 can also perform thermal management and / or safety management on the battery cell 10.

[0093] In some embodiments, the battery 1100 may not include the box body 3, but instead a plurality of battery cells 10 are electrically connected and formed into a whole through necessary fixing structures and then assembled into an electrical device.

[0094] Referring to Figures 3 to 13, schematic diagrams of a battery 1100 and a battery cell 10 provided in an embodiment of the present application are representatively shown. In the following exemplary embodiments, the multiple battery cells 10 in the battery 1100 provided in an embodiment of the present application are described as an example in which the multiple battery cells 10 are connected in series. It is easy for those skilled in the art to understand that the relevant designs of the battery 1100 and the battery cell 10 provided in the embodiment of the present application can also be used in a battery 1100 in which the multiple battery cells 10 in the battery 1100 are in a parallel or mixed state; and that various modifications, additions, substitutions, deletions or other changes are made to the following embodiments, and these changes are still within the scope of the principle of the battery 1100 provided in the embodiment of the present application.

[0095] For ease of understanding and description, the embodiments provided in this application are described only with respect to a rectangular battery cell 10. It should be understood that the embodiments provided in this application are also applicable to a cylindrical battery cell 10 or a soft-pack battery cell 10, and the embodiments of this application are not limited thereto.

[0096] Referring to Figures 3 to 6, in some embodiments of the present application, a battery 1100 is provided, which includes a battery unit 1 and a sampling assembly 2. The battery unit 1 includes a plurality of columns of battery cells 10 arranged along a first direction, and each column of battery cells 10 includes a plurality of battery cells 10 arranged along a second direction; the battery cells 10 have a pressure relief mechanism 12, an electrode terminal 13, and a first side wall 1111 along a third direction, and the electrode terminal 13 includes a first electrode terminal 131 and a second electrode terminal 132 with different polarities; the first electrode terminal 131, the second electrode terminal 132, and the pressure relief mechanism 12 are spaced apart along the first direction on the first side wall. 1111, the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12; or, the first electrode terminal 131 and the second electrode terminal 132 are spaced apart along the first direction on the first side wall 1111, and the pressure relief mechanism 12 is provided on the other side wall of the battery cell 10; wherein, the first direction and the second direction intersect, and the third direction is perpendicular to the first direction and the second direction; the sampling assembly 2 includes an electrical connector 21 and a sampling member 22 for electrically connecting to the electrical connector 21, the electrode terminals 13 of two adjacent battery cells 10 are connected by the electrical connector 21, and a sampling member 22 is provided between the electrode terminals 13 of each two adjacent columns of battery cells 10.

[0097] A battery unit 1 may refer to a component consisting of multiple battery cells 10. The multiple battery cells 10 are arranged along a first direction and a second direction. The battery cells 10 arranged along the first direction form a row of battery cells 10, and the battery cells 10 arranged along the second direction form a column of battery cells 10. The battery unit 1 includes multiple rows and columns of battery cells 10. The first direction may refer to the direction along which one side of the battery cell 10 extends. The first direction and the second direction are non-parallel, for example, the angle between the first direction and the second direction may be an acute angle or a right angle. The third direction may refer to a direction perpendicular to the first and second directions.

[0098] For example, the first direction may refer to a length direction X of the battery cell 10 , the second direction may refer to a width direction Y of the battery cell 10 , and the third direction may refer to a height direction Z of the battery cell 10 .

[0099] The battery cell 10 may refer to a minimum unit constituting the battery unit 1 , and the battery cell 10 includes an electrode assembly 14 and a case 11 , and the electrode assembly 14 is mounted in the case 11 to be protected by the case 11 .

[0100] For example, the electrode assembly 14 consists of a positive electrode sheet, a negative electrode sheet, and a separator. The electrode assembly 14 primarily operates by the movement of metal ions between the positive and negative electrode sheets. The positive electrode sheet includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector. The portion of the positive current collector not coated with the positive active material layer protrudes from the portion coated with the positive active material layer. The portion not coated with the positive active material layer serves as the positive electrode tab, or a metal conductor is welded to the positive current collector and extended to serve as the positive electrode tab.

[0101] Taking lithium-ion batteries as an example, the positive electrode current collector can be made of aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, among others. The negative electrode sheet comprises a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector, and the portion of the negative electrode current collector not coated with the negative electrode active material layer protrudes from the portion coated with the negative electrode active material layer. This portion of the negative electrode current collector not coated with the negative electrode active material layer serves as the negative electrode tab, or a metal conductor is welded to the negative electrode current collector and extended to serve as the negative electrode tab. The negative electrode current collector can be made of copper, and the negative electrode active material can be made of carbon, silicon, or other materials.

[0102] To ensure that high currents can flow without melting, multiple positive electrode tabs are stacked together, and multiple negative electrode tabs are stacked together. It is understood that in the electrode assembly 14, there can be one positive electrode tab and one negative electrode tab. That is, the electrode assembly 14 is provided with two sets of tabs 141, each set including at least one tab 141, with one set of tabs 141 being the positive electrode tab and the other set of tabs 141 being the negative electrode tab.

[0103] The electrode assembly 14 can be a wound structure or a laminated structure. The embodiments of the present application are not limited to this. The wound structure is mostly to weld the tab 141 to the current collector, and then arrange it in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm; and then form a cylindrical or square battery cell by winding. The laminated structure is mostly to lead out the tab 141 on the current collector, arrange the positive electrode sheet, negative electrode sheet and separator in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm, and stack them together layer by layer to form a laminated battery cell; wherein, the separator can be cut and directly laminated with the separator sheet, or the separator is not cut, but is folded in a Z shape. The material of the separator can be PP (Polypropylene, polypropylene) or PE (Polyethylene, polyethylene) and the like. The separator is an insulating film placed between the positive and negative electrodes. Its primary function is to isolate the positive and negative electrodes and prevent electrons from freely passing through the battery cell 10, thus preventing short circuits to a certain extent. However, it allows ions in the electrolyte to pass freely between the positive and negative electrodes, forming a circuit between them. The positive and negative electrode sheets are collectively referred to as the electrode sheets. The positive and negative electrode tabs are collectively referred to as the tabs 141.

[0104] The outer shell 11 is a housing 112 with a space inside to accommodate and protect the electrode assembly 14. The outer shell 11 can be made of a material with a certain degree of hardness and strength. This prevents deformation when subjected to compression or collision, thus providing the battery cell 10 with greater structural strength and improved reliability. The outer shell 11 can be made of a variety of materials, including but not limited to copper, iron, aluminum, stainless steel, aluminum alloy, and plastic.

[0105] The first side wall 1111 may refer to one of the two side walls of the outer shell 11 that are spaced apart along the third direction; for example, the first side wall 1111 is parallel to the first direction and the second direction, so that a plurality of battery cells 10 are arranged along the first direction and the second direction, and the first side wall 1111 exposes the battery unit 1 to facilitate electrical connection between the electrode terminal 13 of the battery cell 10 and the electrical connector 21.

[0106] The electrode terminal 13 is a conductive member disposed on the first sidewall 1111. The electrode terminal 13 is connected to the tab 141 of the electrode assembly 14 to output electrical energy from the battery cell 10 or charge the battery cell 10. A battery cell 10 generally has two electrode terminals 13, each connected to the positive and negative tabs of the electrode assembly 14. The electrode terminal 13 connected to the positive tab is the positive electrode terminal, and the electrode terminal 13 connected to the negative tab is the negative electrode terminal. That is, one of the first electrode terminal 131 and the second electrode terminal 132 is the positive electrode terminal, and the other is the negative electrode terminal.

[0107] The pressure relief mechanism 12 may be a component capable of releasing gas or liquid inside the battery cell 10 to reduce the internal pressure of the battery cell 10. The pressure relief mechanism 12 may be, but is not limited to, an explosion-proof valve or explosion-proof disk. If the battery cell 10 overheats or becomes over-pressurized during charging or use, the pressure relief mechanism 12 opens to release the internal pressure of the battery cell 10, reducing the risk of explosion of the battery cell 10. This improves the safety performance of the battery cell 10 and reduces potential safety risks.

[0108] The first electrode terminal 131, the second electrode terminal 132 and the pressure relief mechanism 12 are spaced apart along the first direction on the first side wall 1111, and the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12. It can be understood that the pressure relief mechanism 12 and the electrode terminal 13 are arranged on the same side wall of the battery cell 10, the pressure relief mechanism 12 is located on one side of the electrode terminal 13, and the second electrode terminal 132 is close to the pressure relief mechanism 12; the first electrode terminal 131, the second electrode terminal 132 and the pressure relief mechanism 12 are spaced apart along the first direction so that there is a gap between the three, which can reduce mutual interference between components and reduce the risk of short circuit.

[0109] The first electrode terminal 131 and the second electrode terminal 132 are spaced apart along the first direction on the first side wall 1111, and the pressure relief mechanism 12 is located on the other side walls of the battery cell 10; it can be understood that the electrode terminal 13 and the pressure relief mechanism 12 are located on different side walls of the battery cell 10, and the first electrode terminal 131 and the second electrode terminal 132 are spaced apart along the first direction, so that there is a gap between the first electrode terminal 131 and the second electrode terminal 132, which can reduce the risk of short circuit.

[0110] The sampling assembly 2 may be a component used to achieve electrical connection between battery cells 10 and collect data from the battery cells 10. The sampling assembly 2 includes an electrical connector 21 and a sampling component 22. The electrical connector 21 may be a component that electrically connects the electrode terminals 13 of two adjacent battery cells 10. The electrical connector 21 has conductive properties to meet the electrical connection requirements of the battery cells 10, such as a tab. The electrical connector 21 may completely cover the first electrode terminal 131 to which it is connected, or it may cover a portion of the first electrode terminal 131 to which it is connected. Similarly, the electrical connector 21 may completely cover the second electrode terminal 132 to which it is connected, or it may cover a portion of the second electrode terminal 132 to which it is connected. For ease of illustration, the electrical connector 21 in the accompanying drawings covers a portion of the first electrode terminal 131 to which it is connected, and the electrical connector 21 covers a portion of the second electrode terminal 132 to which it is connected.

[0111] For example, when the polarity of the first electrode terminals 131 in two adjacent battery cells 10 is the same, the two first electrode terminals 131 are respectively connected to the two ends of the electrical connector 21, and the two second electrode terminals 132 are respectively connected to the two ends of the electrical connector 21, so that the two adjacent battery cells 10 can be connected in parallel.

[0112] For example, when the polarity of the first electrode terminals 131 in two adjacent battery cells 10 is the same, the first electrode terminal 131 of one battery cell 10 and the second electrode terminal 132 of the other battery cell 10 are connected to the two ends of the electrical connector 21, so that the series connection of the two adjacent battery cells 10 can be achieved. After the battery cells 10 are electrically connected in sequence, the electrode terminals 13 located at the front and the back are the total negative and total positive of the battery unit 1, respectively.

[0113] The sampling component 22 can be a component capable of acquiring electrical information from the battery cell 10. The sampling component 22 is electrically connected to the electrical connector 21, allowing the electrical information from the battery cell 10 to be transmitted to the sampling component 22, thereby enabling sampling by the sampling component 22. The sampling component 22 can be a flexible printed circuit (FPC), a rigid printed circuit board (PCB), or a conductive wire. The sampling component 22 and the electrical connector 21 can be electrically connected to a first conductive component 23, where the first conductive component 23 can be, but is not limited to, a conductive wire or a conductive sheet.

[0114] A sampling piece 22 is provided between the electrode terminals 13 of each two adjacent columns of battery cells 10. It can be understood that, among multiple columns of battery cells 10, two adjacent columns of battery cells 10 form a battery group 1100, and the two adjacent battery groups 1100 do not include the same column of battery cells 10, that is, the two adjacent battery groups 1100 include four columns of battery cells 10; a sampling piece 22 is correspondingly provided for each battery group 1100, and the opposite sides of the sampling piece 22 respectively cover the side portions of the first side walls 1111 of the two adjacent columns of battery cells 10 that are close to each other; of course, the sampling piece 22 can also cover the side portions of the first side wall 1111 of a column of battery cells 10.

[0115] In the battery 1100 of the embodiment of the present application, since the second electrode terminal 132 of the battery cell 10 is located between the first electrode terminal 131 and the pressure relief mechanism 12, or the first electrode terminal 131 and the second electrode terminal 132 are located on the first side wall 1111 of the battery cell 10, and the pressure relief mechanism 12 is located on the other side walls of the battery cell 10, the spacing between the first electrode terminal 131 and the second electrode terminal 132 can be set to be smaller, thereby reducing the distance between the electrical connector 21 and the sampling member 22 and reducing the sampling distance of the sampling member 22; therefore, two columns of battery cells 10 can share one sampling member 22, thereby reducing the number of sampling members 22 and reducing the production cost of the battery 1100.

[0116] In some cases, the size of the battery cell 10 in the first direction (refer to the length of the battery cell 10) is much larger than the size of the battery cell 10 in the second direction (refer to the width of the battery cell 10), so that the number of rows of battery cells 10 is much larger than the number of columns of battery cells 10. In the battery 1100 of the embodiment of the present application, the sampling piece 22 connects two adjacent columns of battery cells 10 instead of connecting two adjacent rows. This can also reduce the number of sampling pieces 22 and reduce the production cost of the battery 1100.

[0117] In other embodiments of the present application, referring to FIG3 , in the same column of battery cells 10, two adjacent battery cells 10 are respectively a first battery cell 10a and a second battery cell 10b, the second electrode terminal 132 of the first battery cell 10a is arranged opposite to the second electrode terminal 132 of the second battery cell 10b, the first electrode terminal 131 of the first battery cell 10a is located on one side of the second electrode terminal 132 of the first battery cell 10a, and the first electrode terminal 131 of the second battery cell 10b is located on the other side of the second electrode terminal 132 of the first battery cell 10a.

[0118] In the same column of battery cells 10, one of the two adjacent battery cells 10 is a first battery cell 10a, and the other is a second battery cell 10b. The second electrode terminal 132 of the first battery cell 10a and the second electrode terminal 132 of the second battery cell 10b are arranged along the second direction, and the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are located on opposite sides of the second electrode terminal 132 of the first battery cell 10a along the first direction.

[0119] In the case where multiple battery cells 10 are connected in series, along the second direction, the first electrode terminal 131 of the second battery cell 10b is arranged close to the sampling member 22, the second electrode terminal 132 of the previous first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are respectively connected to the two ends of the electrical connector 21, and the first electrode terminal 131 of the next first battery cell 10a and the second electrode terminal 132 of the next second battery cell 10b are respectively connected to the two ends of the electrical connector 21; wherein, of the two electrical connectors 21, the sampling distance between the previous electrical connector 21 and the sampling member 22 may be equal to that of the next electrical connector 21. The distance between the first electrode terminal 131 of the second battery cell 10b and the sampling piece 22, the sampling distance between the latter electrical connector 21 and the sampling piece 22 is equal to the distance between the second electrode terminal 132 of the second battery cell 10b and the sampling piece 22, and the first electrode terminal 131 of the second battery cell 10b is arranged close to the sampling piece 22, so that the maximum sampling distance of the sampling piece 22 can be equal to the distance between the second electrode terminal 132 of the second battery cell 10b and the sampling piece 22, and the second electrode terminal 132 is located between the first electrode terminals 131 of two adjacent battery cells 10, thereby reducing the sampling distance of the sampling piece 22.

[0120] By adopting the technical solution of this embodiment, the second electrode terminal 132 of the first battery cell 10a and the second electrode terminal 132 of the second battery cell 10b are arranged opposite to each other, so that the distance between the electrical connector 21 connected to the second electrode terminal 132 and the sampling component 22 is closer, which reduces the sampling distance of the sampling component 22 and facilitates two adjacent columns of battery cells 10 to share one sampling component 22.

[0121] In other embodiments of the present application, referring to FIG. 3 , the end of the electrical connector 21 close to the sampling member 22 is connected to the sampling member 22 .

[0122] It can be understood that the end of the electrical connector 21 that is closest to the sampling member 22 is connected to the sampling member 22 .

[0123] By adopting the technical solution of this embodiment, the wiring distance and the sampling distance between the electrical connector 21 and the sampling component 22 can be reduced, and the sampling wiring distance and the sampling distance can be reduced.

[0124] In some other embodiments of the present application, referring to FIG. 4 , the second electrode terminal 132 is located in the middle of the first sidewall 1111 along the first direction.

[0125] It can be understood that, one of the two side edges of the first side wall 1111 that are relatively distributed along the first direction is the first side edge 11111, and the other side edge is the second side edge 11112, and the first side edge 11111 is located on the side of the second electrode terminal 132 that is away from the first electrode terminal 131; the distance L1 between the second electrode terminal 132 and the first side edge 11111 is equal to or approximately equal to the distance L3 between the second electrode terminal 132 and the second side edge 11112; in this way, when the battery cell 10 is flipped 180°, the second electrode terminal 132 is still located in the middle position, therefore, the first battery cell 10a and the second battery cell 10b can use the same type of battery cell 10, and flipping one of the two adjacent battery cells 10 can obtain the first battery cell 10a and the second battery cell 10b.

[0126] By adopting the technical solution of this embodiment, the battery unit 1 can use the same type of battery cells 10, which is beneficial to reducing the production cost.

[0127] In other embodiments of the present application, referring to Figures 7 and 8, in the same column of battery cells 10, two adjacent battery cells 10 are respectively a first battery cell 10a and a second battery cell 10b, the first electrode terminal 131 of the first battery cell 10a is arranged opposite to the second electrode terminal 132 of the second battery cell 10b, and the second electrode terminal 132 of the first battery cell 10a is arranged opposite to the first electrode terminal 131 of the second battery cell 10b.

[0128] It is understood that the first electrode terminal 131 of the first battery cell 10a and the second electrode terminal 132 of the second battery cell 10b are arranged along the second direction, and the second electrode terminal 132 of the first battery cell 10a and the first battery 1100 terminal of the second battery cell 10b are arranged along the second direction.

[0129] By adopting the technical solution of this embodiment, the electrode terminals 13 of the battery cells 10 are arranged in a regular manner, which facilitates the installation of the electrical connector 21 .

[0130] In some other embodiments of the present application, referring to FIG. 8 , the first electrode terminal 131 and the second electrode terminal 132 are symmetrically arranged about a bisector A of the first side wall 1111 in the first direction.

[0131] It is understood that the distance L4 between the first electrode terminal 131 and the bisector A is equal to the distance L5 between the second electrode terminal 132 and the bisector A, the distance L6 between the bisector A and the first side 11111 is equal to the distance L7 between the bisector A and the second side 11112, and the bisector A is perpendicular to the first direction. In this way, when the battery cell 10 is flipped 180°, the positions of the first and second electrode terminals 132 of the battery cell 10 are interchanged, allowing the first and second battery cells 10a, 10b to be the same type of battery cell 10. Simply flipping one of the two adjacent battery cells 10 180° creates the first and second battery cells 10a, 10b.

[0132] By adopting the technical solution of this embodiment, the battery unit 1 can use the same type of battery cells 10, which is beneficial to reducing the production cost.

[0133] In other embodiments of the present application, referring to Figures 9 and 10, in the same column of battery cells 10, two adjacent battery cells 10 are respectively a first battery cell 10a and a second battery cell 10b, and the electrode terminal 13 of the first battery cell 10a and the electrode terminal 13 of the second battery cell 10b are arranged close to the sampling piece 22; the first electrode terminal 131 of the first battery cell 10a is arranged opposite to the first electrode terminal 131 of the second battery cell 10b, and the second electrode terminal 132 of the second battery cell 10b is arranged opposite to the second electrode terminal 132 of the second battery cell 10b.

[0134] When the first side wall 1111 is provided with a pressure relief mechanism 12, the first electrode terminal 131 and the second electrode terminal 132 of the first battery cell 10a are located between the sampling piece 22 and the pressure relief mechanism 12 of the first battery cell 10a, and the first electrode terminal 131 and the second electrode terminal 132 of the second battery cell 10b are located between the sampling piece 22 and the pressure relief mechanism 12 of the second battery cell 10b; the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are arranged along the second direction, and the second electrode terminal 132 of the first battery cell 10a and the second battery terminal 1100 of the second battery cell 10b are arranged along the second direction.

[0135] By adopting the technical solution of this embodiment, the electrode terminals 13 of the battery cells 10 are arranged in a regular manner, which facilitates the installation of the electrical connector 21 .

[0136] In some other embodiments of the present application, referring to FIG. 3 and FIG. 7 , the polarity of the first electrode terminal 131 of the first battery cell 10 a and the polarity of the first electrode terminal 131 of the second battery cell 10 b are the same.

[0137] It can be understood that the second electrode terminal 132 of the first battery cell 10 a and the second electrode terminal 132 of the second battery cell 10 b have the same polarity.

[0138] For example, the first electrode terminal 131 of the first battery cell 10a is a positive electrode terminal, the second electrode terminal 132 of the first battery cell 10a is a negative electrode terminal, the first electrode terminal 131 of the second battery cell 10b is a positive electrode terminal, and the second electrode terminal 132 of the second battery cell 10b is a negative electrode terminal.

[0139] For example, the first electrode terminal 131 of the first battery cell 10a is a negative electrode terminal, the second electrode terminal 132 of the first battery cell 10a is a positive electrode terminal, the first electrode terminal 131 of the second battery cell 10b is a negative electrode terminal, and the second electrode terminal 132 of the second battery cell 10b is a positive electrode terminal.

[0140] By adopting the technical solution of this embodiment, the polarity of the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are the same, which facilitates the first battery cell 10a and the second battery cell 10b to use the same type of battery cell 10, thereby reducing the production cost of the battery 1100.

[0141] In some other embodiments of the present application, referring to FIG. 9 , the polarity of the first electrode terminal 131 of the first battery cell 10 a and the polarity of the first electrode terminal 131 of the second battery cell 10 b are different.

[0142] It is understood that the polarities of the second electrode terminal 132 of the first battery cell 10 a and the second electrode terminal 132 of the second battery cell 10 b are different.

[0143] For example, the first electrode terminal 131 of the first battery cell 10a is a positive electrode terminal, the second electrode terminal 132 of the first battery cell 10a is a negative electrode terminal, the first electrode terminal 131 of the second battery cell 10b is a negative electrode terminal, and the second electrode terminal 132 of the second battery cell 10b is a positive electrode terminal.

[0144] For example, the first electrode terminal 131 of the first battery cell 10a is a negative electrode terminal, the second electrode terminal 132 of the first battery cell 10a is a positive electrode terminal, the first electrode terminal 131 of the second battery cell 10b is a positive electrode terminal, and the second electrode terminal 132 of the second battery cell 10b is a negative electrode terminal.

[0145] By adopting the technical solution of this embodiment, the polarities of the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are different, which can facilitate the electrical connection between the electrode terminal 13 and the electrical connector 21 and reduce the manufacturing cost of the battery 1100.

[0146] In other embodiments of the present application, referring to Figures 9 and 10, the first side wall 1111 has a first side edge 11111 and a second side edge 11112 spaced apart along a first direction, and the first electrode terminal 131 is located between the second electrode terminal 132 and the first side edge 11111; the spacing between the first side edge 11111 and the second side edge 11112 is L, and the distance between the second electrode terminal 132 and the first side edge 11111 is L1, wherein 0.2≤L1 / L≤0.5.

[0147] The distance L between the first side 11111 and the second side 11112 may refer to the size of the first side wall 1111 in the first direction, that is, the length of the battery cell 10, which is also equal to the distance L6 between the bisector A and the first side 11111 plus the distance L7 between the bisector A and the second side 11112; the distance L1 between the second electrode terminal 132 and the first side 11111 may refer to the distance between the side of the second electrode terminal 132 close to the first electrode terminal 131 and the first side 11111.

[0148] 0.2≤L1 / L≤0.5. It can be understood that L1 / L≤0.5 makes the first electrode terminal 131 and the second electrode terminal 132 deviate from the middle position of the first side wall 1111 along the first direction. In this way, when the first side 11111 is arranged close to the sampling piece 22, the distance between the second electrode terminal 132 and the sampling piece 22 can be reduced, which is conducive to reducing the sampling distance; L1 / L≥0.2 makes there be a certain space between the second electrode terminal 132 and the first side 11111. The space can be used for the first electrode terminal 131 and the second electrode terminal 132 to be installed at intervals, reducing the risk of short circuit, and can also allow the positive electrode tab and the negative electrode tab to have a certain spacing space, reducing the risk of short circuit.

[0149] By adopting the technical solution of this embodiment, it is beneficial to reduce the sampling distance and also reduce the short circuit risk of the battery cell 10 .

[0150] In other embodiments of the present application, referring to FIG. 9 and FIG. 10 , 0.35≤L1 / L≤0.45.

[0151] 0.35≤L1 / L≤0.45. It can be understood that L1 / L≤0.45 allows the first electrode terminal 131 and the second electrode terminal 132 to be arranged on the side of the first side wall 1111 close to the first side edge 11111. In this way, when the first side edge 11111 is arranged close to the sampling piece 22, the distance between the second electrode terminal 132 and the sampling piece 22 can be better reduced, which is conducive to reducing the sampling distance; L1 / L≥0.35 allows a larger space to be provided between the second electrode terminal 132 and the first side edge 11111. The space can be used for the first electrode terminal 131 and the second electrode terminal 132 to be installed at intervals, and the spacing distance between the first electrode terminal 131 and the second electrode terminal 132 is larger, which can better reduce the risk of short circuit, and can also allow the positive electrode tab and the negative electrode tab to have a larger spacing space, thereby better reducing the risk of short circuit.

[0152] By adopting the technical solution of this embodiment, the sampling distance can be better reduced, and the short circuit risk of the battery cell 10 can also be better reduced.

[0153] In some embodiments, the value of L1 / L can be 0.2, 0.5, or any value between 0.2 and 0.5; for example, the value of L1 / L can be, but is not limited to, 0.2, 0.21, 0.22, 0.23, 0.24, 0.25, 0.26, 0.27, 0.28, 0.29, 0.3, 0.31, 0.32, 0.33, 0.34, 0.35, 0.36, 0.37, 0.38, 0.39, 0.4, 0.41, 0.42, 0.43, 0.44, 0.45, 0.46, 0.47, 0.48, 0.49, or 0.5.

[0154] In other embodiments of the present application, referring to Figures 11 and 12, the pressure relief mechanism 12 is provided on the first side wall 1111, the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12, the first side wall 1111 has a first side edge 11111 and a second side edge 11112 spaced apart along the first direction, the first electrode terminal 131 is located between the second electrode terminal 132 and the first side edge 11111; the spacing between the first side edge 11111 and the second side edge 11112 is L, and the distance between the second electrode terminal 132 and the pressure relief mechanism 12 is L2, wherein 0.5≤L2 / L≤2 / 3.

[0155] The distance L2 between the second electrode terminal 132 and the pressure relief mechanism 12 may refer to the distance between the side surface of the second electrode terminal 132 close to the second side edge 11112 and the pressure relief mechanism 12 .

[0156] 0.5≤L2 / L≤2 / 3. It can be understood that L2 / L≥0.5, so that the distance between the second electrode terminal 132 and the pressure relief mechanism 12 is greater than or equal to half of the size of the first side wall 1111 along the first direction. The distance between the second electrode terminal 132 and the pressure relief mechanism 12 is far, and the distance between the first electrode terminal 131 and the pressure relief mechanism 12 is even farther, so that the particles ejected when the pressure relief mechanism 12 is turned on are not easy to move between the electrical connector 21 and the first side wall 1111, thereby reducing the risk of electrical overlap and conduction between the electrical connector 21 and the first side wall 1111 due to particles; L2 / L≤2 / 3, so that there is a certain space between the second electrode terminal 132 and the first side 11111, and the space can be used for the first electrode terminal 131 and the second electrode terminal 132 to be installed at intervals, reducing the risk of short circuit, and can also allow the positive electrode tab and the negative electrode tab to have a certain spacing space, reducing the risk of short circuit.

[0157] By adopting the technical solution of this embodiment, the risk of electrical overlap between the electrical connector 21 and the first side wall 1111 can be reduced, and the risk of short circuit of the battery cell 10 can also be reduced, which is conducive to improving the reliability of the battery 1100.

[0158] In other embodiments of the present application, referring to FIG. 11 and FIG. 12 , 0.55≤L2 / L≤0.65.

[0159] 0.55≤L2 / L≤0.65. It can be understood that L2 / L≥0.55, so that the distance between the second electrode terminal 132 and the pressure relief mechanism 12 is greater than half of the dimension of the first side wall 1111 along the first direction. The distance between the second electrode terminal 132 and the pressure relief mechanism 12 is relatively far, and the distance between the first electrode terminal 131 and the pressure relief mechanism 12 is even farther, so that the particles ejected by the pressure relief mechanism 12 are less likely to move between the electrical connector 21 and the first side wall 1111 when the pressure relief mechanism 12 is opened, thereby better reducing the risk of particles being introduced into the pressure relief mechanism 12. The risk of electrical overlap and conduction between the connecting member 21 and the first side wall 1111 is reduced; L2 / L≤0.65, so that there is a large space between the second electrode terminal 132 and the first side 11111, and the space can be used for the first electrode terminal 131 and the second electrode terminal 132 to be installed at intervals, and the spacing distance between the first electrode terminal 131 and the second electrode terminal 132 is large, which can better reduce the risk of short circuit, and can also allow the positive electrode tab and the negative electrode tab to have a larger spacing space, thereby better reducing the risk of short circuit.

[0160] By adopting the technical solution of this embodiment, the risk of electrical overlap between the electrical connector 21 and the first side wall 1111 can be better reduced, and the risk of short circuit of the battery cell 10 can be better reduced, which is conducive to improving the reliability of the battery 1100.

[0161] In some embodiments, the value of L2 / L can be 0.5, 2 / 3, or any value between 0.5 and 2 / 3; for example, the value of L2 / L can be, but is not limited to, 0.5, 0.51, 0.52, 0.53, 0.54, 0.55, 0.56, 0.57, 0.58, 0.59, 0.6, 0.61, 0.62, 0.63, 0.64, 0.65, 0.66, or 2 / 3.

[0162] In other embodiments of the present application, as shown in FIG13 , the pressure relief mechanism 12 is disposed on the first side wall 1111 , and the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12 . In the same column of battery cells 10 , the pressure relief mechanisms 12 of the battery cells 10 are staggered.

[0163] When the pressure relief mechanism 12 is provided on the first side wall 1111 and the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12, in the same row of battery cells 10, the pressure relief mechanisms 12 of the battery cells 10 are not located on the same straight line parallel to the second direction; wherein, the pressure relief mechanisms 12 of the battery cells 10 can be arranged along a straight line inclined relative to the sampling member 22, or along a folded line.

[0164] For example, the pressure relief mechanism 12 of the first battery cell 10a is arranged along a first straight line B, and the pressure relief mechanism 12 of the second battery cell 10b is arranged along a second straight line C. The first straight line B and the second straight line C are spaced apart, and the first straight line B and the second straight line C are both parallel to the second direction. With this arrangement, the structure of the battery cell 10 is simple, and the operation of grouping the battery cells 10 to form a battery unit 1 is simple.

[0165] By adopting the technical solution of this embodiment, the pressure relief mechanisms 12 are staggered, which can increase the distance between the pressure relief mechanisms 12 of two adjacent battery cells 10. This can reduce the impact of high temperature shock and ejected particulate matter after the pressure relief mechanisms 12 are opened on the pressure relief mechanisms 12 of adjacent battery cells 10, reduce the risk of melting through the pressure relief mechanisms 12 of adjacent battery cells 10, and help improve the reliability of the battery cells 10.

[0166] In other embodiments of the present application, referring to FIG. 3 , a plurality of battery cells 10 are connected in series via electrical connectors 21 .

[0167] It can be understood that the two electrode terminals 13 of two adjacent battery cells 10 with different polarities are electrically connected to the two ends of the electrical connector 21 respectively. This connection method is simple.

[0168] For example, referring to Figure 7, in the same column of battery cells 10, the first electrode terminal 131 of the first battery cell 10a and the second electrode terminal 132 of the second battery cell 10b are arranged opposite to each other, and the second electrode terminal 132 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are arranged opposite to each other. The polarity of the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are the same. In this way, the electrical connector 21 can be arranged parallel to the second direction, thereby connecting the first battery cell 10a and the second battery cell 10b in series. The arrangement of the electrical connector 21 is regular and simple, which is conducive to improving production efficiency and reducing the risk of short circuit.

[0169] For example, referring to Figure 9, in the same column of battery cells 10, the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are arranged opposite to each other, and the second electrode terminal 132 of the first battery cell 10a and the second electrode terminal 132 of the second battery cell 10b are arranged opposite to each other. The polarity of the first electrode terminal 131 of the first battery cell 10a and the first electrode terminal 131 of the second battery cell 10b are different. In this way, the electrical connector 21 can be arranged parallel to the second direction, thereby connecting the first battery cell 10a and the second battery cell 10b in series. The arrangement of the electrical connector 21 is regular and simple, which is conducive to improving production efficiency and reducing the risk of short circuit.

[0170] By adopting the technical solution of this embodiment, the battery cells 10 are connected in series, and the electrical connection operation between the battery cells 10 is simple, which is conducive to reducing the manufacturing cost of the battery cells 10.

[0171] In other embodiments of the present application, referring to FIG. 3 , the sampling member 22 extends along the second direction.

[0172] It can be understood that the sampling member 22 is in the shape of an elongated strip and is arranged parallel to the second direction.

[0173] By adopting the technical solution of this embodiment, the sampling member 22 can be arranged corresponding to the battery cells 10 in two adjacent columns of battery cells 10 , which is beneficial to reducing the connection distance between the electrical connector 21 and the sampling member 22 .

[0174] In other embodiments of the present application, referring to FIG. 3 , the sampling member 22 includes at least one of a flexible circuit board and a rigid circuit board.

[0175] It can be understood that the sampling piece 22 can be a flexible circuit board, which is soft and bendable and has better adaptability to the battery cell 10; the sampling piece 22 can be a hard circuit board, which has good structural strength and is not easy to damage, which is conducive to improving the reliability of sampling; the sampling piece 22 includes a flexible circuit board and a hard circuit board, and the flexible circuit board and the hard circuit board can be reasonably selected according to actual conditions, so that the setting of the sampling piece 22 is more flexible and more practical.

[0176] By adopting the technical solution of this embodiment, different types of sampling pieces 22 can be selected according to actual conditions, making the arrangement of the sampling pieces 22 more flexible and more practical.

[0177] In other embodiments of the present application, referring to FIG. 5 and FIG. 6 , the battery cell 10 has a second side wall 1121 disposed opposite to the first side wall 1111 , and the second side wall 1121 is provided with a pressure relief mechanism 12 .

[0178] It is understandable that one of the two opposite side walls of the battery cell 10 along the third direction is the first side wall 1111 , and the other is the second side wall 1121 , and the second side wall 1121 is provided with a pressure relief mechanism 12 .

[0179] For example, the battery cell 10 may have only the second side wall 1121 provided with a pressure relief mechanism 12, or both the first side wall 1111 and the second side wall 1121 may be provided with a pressure relief mechanism 12, or the second side wall 1121 may be provided with a pressure relief mechanism 12, the first side wall 1111 may not be provided with a pressure relief mechanism 12, and the other side walls except the first side wall 1111 and the second side wall 1121 may also be provided with a pressure relief mechanism 12.

[0180] By adopting the technical solution of this embodiment, the pressure relief mechanism 12 is arranged on the second side wall 1121. In this way, the particulate matter ejected when the pressure relief mechanism 12 of the second side wall 1121 is opened is not easy to come into contact with the electrical connector 21, the electrode terminal 13 and the sampling member 22, thereby reducing the risk of damage to the electrical connector 21, the electrode terminal 13 and the sampling member 22, which is conducive to improving the reliability of the battery 1100.

[0181] In some other embodiments of the present application, as shown in FIG. 3 , the battery cell 10 is provided with a temperature sensor 15 for acquiring temperature information, and the temperature sensor 15 is electrically connected to the sampling component 22 .

[0182] The temperature sensor 15 may refer to a component capable of acquiring temperature information, and the temperature sampling component 22 may be, but is not limited to, a thermistor, a thermocouple, a semiconductor sensor, etc.; the temperature sensor 15 is electrically connected to the sampling component 22. It can be understood that the temperature sensor 15 can transmit the temperature signal to the sampling component 22, and the sampling component 22 can feed back the acquired temperature signal to the battery management module 4, so as to monitor the working status of the battery 1100 and take necessary measures, such as controlling the charge and discharge rate, preventing overheating, etc.

[0183] The temperature sensor 15 and the sampling element 22 may be electrically connected via a second conductive component 24 , wherein the second conductive component 24 may be, but is not limited to, a wire, a conductive sheet, or the like.

[0184] By adopting the technical solution of this embodiment, the sampling member 22 cooperates with the temperature sensor 15 to obtain the temperature signal of the battery cell 10, so as to facilitate more comprehensive monitoring of the operating status of the battery cell 10, which is conducive to improving the reliability of the battery 1100.

[0185] In other embodiments of the present application, referring to Figures 5 and 6, a battery cell 10 is provided, which includes a shell 11 and an electrode terminal 13: the shell 11 has a first side wall 1111, the first side wall 1111 is provided with a pressure relief mechanism 12 and a first electrode terminal 131 and a second electrode terminal 132 with different polarities, and the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12; the electrode assembly 14 is located in the shell 11, and the first electrode terminal 131 and the second electrode terminal 132 are electrically connected to the electrode assembly 14 to realize the input and output of electrical energy.

[0186] In the battery cell 10 of the embodiment of the present application, the second electrode terminal 132 is located between the pressure relief mechanism 12 and the first electrode terminal 131, so that the distance between the first electrode terminal 131 and the second electrode terminal 132 can be set to be smaller, so that two adjacent columns of battery cells 10 can share one sampling piece 22, thereby reducing the production cost of the battery 1100.

[0187] In some embodiments, the housing 11 includes an end cover 111 and a shell 112 .

[0188] The end cap 111 refers to a component that covers the opening of the shell 112 to isolate the internal environment of the battery cell 10 from the external environment. Without limitation, the shape of the end cap 111 can be adapted to the shape of the shell 112 to match the shell 112. Optionally, the end cap 111 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 111 is not easily deformed when squeezed and collided, so that the battery cell 10 can have a higher structural strength and the safety performance can also be improved. The material of the end cap 111 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 111, and the insulating member can be used to isolate the electrical connection components in the shell 112 from the end cap 111 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0189] The housing 112 is a component that cooperates with the end cap 111 to form the internal environment of the battery cell 10. This internal environment can be used to accommodate the electrode assembly 14, electrolyte, and other components. The housing 112 and the end cap 111 can be separate components. An opening can be provided in the housing 112, and the end cap 111 is placed over the opening to form the internal environment of the battery cell 10. Alternatively, the end cap 111 and the housing 112 can be integrated. Specifically, the end cap 111 and the housing 112 can form a common connection surface before other components are inserted into the housing. When the interior of the housing 112 is to be enclosed, the end cap 111 is placed over the housing 112. The housing 112 can have a variety of shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, or a hexagonal prism. Specifically, the shape of the housing 112 can be determined based on the specific shape and size of the electrode assembly 14. The housing 112 can be made of a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present application does not impose any particular limitations on this.

[0190] In some embodiments, the end cover 111 is the first side wall 1111 , and the side wall of the shell 112 opposite to the end cover 111 is the second side wall 1121 ; or, one of the two opposite side walls of the shell 112 is the first side wall 1111 , and the other side wall is the second side wall 1121 .

[0191] The battery 1100 according to the embodiment of the present application is described below with reference to some specific embodiments.

[0192] Example 1

[0193] As shown in Figures 3 to 6, in this embodiment, the battery 1100 includes a battery unit 1 and a sampling assembly 2. The battery unit 1 includes a plurality of columns of battery cells 10 arranged along a first direction, and each column of battery cells 10 includes a plurality of battery cells 10 arranged along a second direction; the battery cell 10 has a pressure relief mechanism 12, an electrode terminal 13, and a first side wall 1111 along a third direction, and the electrode terminal 13 includes a first electrode terminal 131 and a second electrode terminal 132 with different polarities; the first electrode terminal 131, the second electrode terminal 132, and the pressure relief mechanism 12 are spaced apart on the first side wall 1111 along the first direction, and the second electrode terminal 131 and the sampling assembly 2 are spaced apart on the first side wall 1111 along the first direction. The terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12; alternatively, the first electrode terminal 131 and the second electrode terminal 132 are spaced apart along the first direction on the first side wall 1111, and the pressure relief mechanism 12 is provided on the other side walls of the battery cell 10; wherein the first direction and the second direction intersect, and the third direction is perpendicular to the first direction and the second direction; the sampling assembly 2 includes an electrical connector 21 and a sampling component 22 for electrically connecting to the electrical connector 21, the electrode terminals 13 of two adjacent battery cells 10 are connected by the electrical connector 21, and a sampling component 22 is provided between the electrode terminals 13 of each two adjacent columns of battery cells 10.

[0194] In this embodiment, in the same column of battery cells 10, two adjacent battery cells 10 are respectively a first battery cell 10a and a second battery cell 10b, the second electrode terminal 132 of the first battery cell 10a is arranged opposite to the second electrode terminal 132 of the second battery cell 10b, the first electrode terminal 131 of the first battery cell 10a is located on one side of the second electrode terminal 132 of the first battery cell 10a, and the first electrode terminal 131 of the second battery cell 10b is located on the other side of the second electrode terminal 132 of the first battery cell 10a.

[0195] In this embodiment, the end of the electrical connector 21 close to the sampling member 22 is connected to the sampling member 22 .

[0196] In this embodiment, the second electrode terminal 132 is located in the middle of the first side wall 1111 in the first direction.

[0197] In this embodiment, the first electrode terminal 131 of the first battery cell 10 a and the first electrode terminal 131 of the second battery cell 10 b have the same polarity.

[0198] In this embodiment, a plurality of battery cells 10 are connected in series via electrical connectors 21 .

[0199] In this embodiment, the sampling member 22 extends along the second direction.

[0200] In this embodiment, the sampling member 22 includes a flexible printed circuit board.

[0201] In this embodiment, the battery cell 10 is provided with a temperature sensor 15 for acquiring temperature information, and the temperature sensor 15 is connected to the sampling component 22 .

[0202] In this embodiment, the battery cell 10 includes an outer shell 11 and an electrode assembly 14. The outer shell 11 has a first side wall 1111. The first side wall 1111 is provided with a pressure relief mechanism 12 and a first electrode terminal 131 and a second electrode terminal 132 with different polarities. The second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12; the electrode assembly 14 is located in the outer shell 11, and the first electrode terminal 131 and the second electrode terminal 132 are electrically connected to the electrode assembly 14 to realize the input and output of electrical energy.

[0203] In this embodiment, the housing 11 includes an end cover 111 and a shell 112 . The end cover 111 covers the opening of the shell 112 . The end cover 111 forms a first side wall 1111 . The side wall of the shell 112 opposite to the end cover 111 forms a second side wall 1121 .

[0204] Example 2

[0205] The difference between this embodiment and the second embodiment is that: referring to Figures 7 and 8, in the same column of battery cells 10, two adjacent battery cells 10 are respectively a first battery cell 10a and a second battery cell 10b, the first electrode terminal 131 of the first battery cell 10a is arranged opposite to the second electrode terminal 132 of the second battery cell 10b, and the second electrode terminal 132 of the first battery cell 10a is arranged opposite to the first electrode terminal 131 of the second battery cell 10b.

[0206] In this embodiment, the first electrode terminal 131 and the second electrode terminal 132 are symmetrically arranged with respect to a bisector A of the first side wall 1111 in the first direction.

[0207] Example 3

[0208] The difference between this embodiment and the first embodiment is that, as shown in Figures 9 and 10, in the same column of battery cells 10, two adjacent battery cells 10 are respectively a first battery cell 10a and a second battery cell 10b, and the electrode terminal 13 of the first battery cell 10a and the electrode terminal 13 of the second battery cell 10b are arranged close to the sampling piece 22; the first electrode terminal 131 of the first battery cell 10a is arranged opposite to the first electrode terminal 131 of the second battery cell 10b, and the second electrode terminal 132 of the second battery cell 10b is arranged opposite to the second electrode terminal 132 of the second battery cell 10b.

[0209] In this embodiment, the polarities of the first electrode terminal 131 of the first battery cell 10 a and the first electrode terminal 131 of the second battery cell 10 b are different.

[0210] In this embodiment, the first side wall 1111 has a first side edge 11111 and a second side edge 11112 spaced apart along the first direction, and the first electrode terminal 131 is located between the second electrode terminal 132 and the first side edge 11111; the spacing between the first side edge 11111 and the second side edge 11112 is L, and the distance between the second electrode terminal 132 and the first side edge 11111 is L1, where 0.2≤L1 / L≤0.5.

[0211] In this embodiment, 0.35≤L1 / L≤0.45.

[0212] Example 4

[0213] The difference between this embodiment and the third embodiment is that: as shown in Figures 11 and 12, the pressure relief mechanism 12 is provided on the first side wall 1111, the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12, the first side wall 1111 has a first side edge 11111 and a second side edge 11112 spaced apart along the first direction, and the first electrode terminal 131 is located between the second electrode terminal 132 and the first side edge 11111; the spacing between the first side edge 11111 and the second side edge 11112 is L, and the distance between the second electrode terminal 132 and the pressure relief mechanism 12 is L2, wherein 0.5≤L2 / L≤2 / 3.

[0214] In this embodiment, 0.55≤L2 / L≤0.65.

[0215] Example 5

[0216] The difference between this embodiment and the third embodiment is that: as shown in Figure 13, the pressure relief mechanism 12 is provided on the first side wall 1111, and the second electrode terminal 132 is located between the first electrode terminal 131 and the pressure relief mechanism 12. In the same column of battery cells 10, the pressure relief mechanisms 12 of the battery cells 10 are staggered.

[0217] In other embodiments of the present application, referring to FIG. 1 , the electrical device includes the battery 1100 as described in the above embodiment; and / or the battery cell 10 as described in the above embodiment.

[0218] It is understandable that the electrical device includes the battery 1100 as described in the above embodiment; or, the battery cell 10 as described in the above embodiment; or, the electrical device includes the battery 1100 as described in the above embodiment and the battery cell 10 as described in the above embodiment.

[0219] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0220] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, wherein: include, A battery unit comprising a plurality of columns of battery cells arranged along a first direction, wherein each column of battery cells comprises a plurality of battery cells arranged along a second direction; The battery cell comprises a pressure relief mechanism, an electrode terminal, and a first side wall along a third direction, the electrode terminal comprising a first electrode terminal and a second electrode terminal having different polarities; the first electrode terminal, the second electrode terminal, and the pressure relief mechanism are spaced apart on the first side wall along the first direction, with the second electrode terminal located between the first electrode terminal and the pressure relief mechanism; or the first electrode terminal and the second electrode terminal are spaced apart on the first side wall along the first direction, with the pressure relief mechanism being located on another side wall of the battery cell; wherein the first direction and the second direction intersect, and the third direction is perpendicular to the first and second directions; The sampling assembly includes an electrical connector and a sampling piece for electrically connecting to the electrical connector. The electrode terminals of two adjacent battery cells are connected via the electrical connector. The sampling piece is provided between the electrode terminals of each two adjacent columns of battery cells.

2. The battery according to claim 1, wherein: In the same column of battery cells, two adjacent battery cells are respectively a first battery cell and a second battery cell, the second electrode terminal of the first battery cell is arranged opposite to the second electrode terminal of the second battery cell, the first electrode terminal of the first battery cell is located on one side of the second electrode terminal of the first battery cell, and the first electrode terminal of the second battery cell is located on the other side of the second electrode terminal of the first battery cell.

3. The battery according to claim 2, wherein: The end of the electrical connector close to the sampling member is connected to the sampling member.

4. The battery according to claim 2 or 3, wherein: The second electrode terminal is located at a middle position of the first side wall in the first direction.

5. The battery according to claim 1, wherein: In the same column of the battery cells, two adjacent battery cells are respectively a first battery cell and a second battery cell, the first electrode terminal of the first battery cell is arranged opposite to the second electrode terminal of the second battery cell, and the second electrode terminal of the first battery cell is arranged opposite to the first electrode terminal of the second battery cell.

6. The battery according to claim 5, wherein: The first electrode terminal and the second electrode terminal are symmetrically arranged about a bisector of the first side wall in the first direction.

7. The battery according to claim 1, wherein: In the same column of battery cells, two adjacent battery cells are respectively a first battery cell and a second battery cell, and the electrode terminal of the first battery cell and the electrode terminal of the second battery cell are arranged close to the sampling piece; the first electrode terminal of the first battery cell is arranged opposite to the first electrode terminal of the second battery cell, and the second electrode terminal of the second battery cell is arranged opposite to the second electrode terminal of the second battery cell.

8. The battery according to any one of claims 2 to 7, wherein: The first electrode terminal of the first battery cell and the first electrode terminal of the second battery cell have the same polarity; or the first electrode terminal of the first battery cell and the first electrode terminal of the second battery cell have different polarities.

9. The battery according to any one of claims 1 to 8, wherein: The first side wall has a first side edge and a second side edge spaced apart along the first direction, and the first electrode terminal is located between the second electrode terminal and the first side edge; the spacing between the first side edge and the second side edge is L, and the distance between the second electrode terminal and the first side edge is L1, wherein 0.2≤L1 / L≤0.

5.

10. The battery according to claim 9, wherein: 0.35≤L1 / L≤0.

45.

11. The battery according to any one of claims 1 to 10, wherein: The pressure relief mechanism is arranged on the first side wall, the second electrode terminal is located between the first electrode terminal and the pressure relief mechanism, the first side wall has a first side edge and a second side edge spaced apart along the first direction, and the first electrode terminal is located between the second electrode terminal and the first side edge; the spacing between the first side edge and the second side edge is L, and the distance between the second electrode terminal and the pressure relief mechanism is L2, wherein 0.5≤L2 / L≤2 / 3.

12. The battery according to claim 11, wherein: 0.55≤L2 / L≤0.

65.

13. The battery according to any one of claims 1 to 12, wherein: The pressure relief mechanism is provided on the first side wall, the second electrode terminal is located between the first electrode terminal and the pressure relief mechanism, and in the same column of battery cells, the pressure relief mechanisms of the battery cells are staggered.

14. The battery according to any one of claims 1 to 13, wherein: The plurality of battery cells are connected in series via the electrical connector.

15. The battery according to any one of claims 1 to 14, wherein: The sampling member extends along the second direction.

16. The battery according to any one of claims 1 to 15, wherein: The sampling member includes at least one of a flexible circuit board and a rigid circuit board.

17. The battery according to any one of claims 1 to 16, wherein: The battery cell has a second side wall arranged opposite to the first side wall, and the second side wall is provided with the pressure relief mechanism.

18. The battery according to any one of claims 1 to 17, wherein: The battery cell is provided with a temperature sensor for acquiring temperature information, and the temperature sensor is connected to the sampling member.

19. A battery cell, wherein: include: The housing has a first side wall, the first side wall is provided with a pressure relief mechanism and a first electrode terminal and a second electrode terminal with different polarities, the second electrode terminal being located between the first electrode terminal and the pressure relief mechanism; The electrode assembly is located in the housing, and the first electrode terminal and the second electrode terminal are electrically connected to the electrode assembly to achieve input and output of electrical energy.

20. An electrical device, wherein: The electrical device comprises a battery as claimed in any one of claims 1 to 18; And / or, the battery cell as claimed in claim 19.

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