Battery and electrical device

Abstract

A battery (100) and an electrical device. The battery (100) comprises: a case (10) which is internally provided with an accommodating space, wherein the case (10) comprises a bottom protection plate (102) and a grounding point, the bottom protection plate (102) being connected to the grounding point, and a conductive exposed area (1021) being provided on a side surface of the bottom protection plate (102) that faces the accommodating space; at least one battery cell (20), wherein the battery cell (20) is accommodated in the accommodating space, and the battery cell (20) comprises a terminal post; and an electrical connection assembly (30) which is accommodated in the accommodating space and comprises a connecting piece (301), wherein the connecting piece (301) is located between the bottom protection plate (102) and the battery cell (20), and is connected to the terminal post, and when electrolyte of the battery cell (20) leaks, the connecting piece (301) is electrically connected to the grounding point by means of the electrolyte and the conductive exposed area (1201).

Description

Batteries and electrical devices

[0001] Priority information

[0002] This application claims priority and benefits of patent application No. 202410161443.2 filed with the State Intellectual Property Office of China on February 4, 2024, and the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the field of batteries, and in particular to a battery and an electrical device. Background Art

[0004] Battery cells may leak electrolyte due to defects in the production process or under external loads. When the battery cell is inverted, the electrolyte can easily leak onto the high-voltage bar to form a loop. If not repaired immediately, it can easily cause high-voltage ignition and lead to safety accidents.

[0005] In the related art, an electrolyte leakage detection sensor is separately provided in the battery box to detect the gas solubility of the volatilized electrolyte inside the box to promptly identify leakage and alarm for maintenance. However, this method is costly due to the additional leakage sensor and corresponding detection circuit.

[0006] Summary of the Invention

[0007] In view of the above problems, the present application provides a battery and an electrical device that can solve the problem of high battery cost caused by the use of leakage sensors.

[0008] In a first aspect, the present application provides a battery, comprising:

[0009] A box body, wherein a housing space is provided in the box body, the box body includes a bottom guard plate and a grounding point, the bottom guard plate is electrically connected to the grounding point, and a conductive exposed area is provided on a side of the bottom guard plate facing the housing space;

[0010] at least one battery cell, the battery cell being accommodated in the accommodation space, the battery cell comprising a terminal;

[0011] An electrical connection component is accommodated in the accommodating space, and the electrical connection component includes a connecting piece, which is located between the bottom guard plate and the battery cell, and the connecting piece is connected to the pole. When the electrolyte of the battery cell leaks, the connecting piece is electrically connected to the grounding point through the electrolyte and the conductive exposed area.

[0012] In the technical solution of the embodiment of the present application, when the electrolyte of the battery cell leaks, the connecting piece is electrically connected to the grounding point through the electrolyte and the conductive exposed area, thereby triggering the insulation alarm function of the battery, realizing electrolyte leakage detection, reducing the use of leakage sensors, and reducing the cost of the battery.

[0013] In some embodiments, an insulating layer is provided between the bottom guard plate and the connecting piece, the insulating layer is provided with through holes along the thickness direction, and the area of ​​the bottom guard plate corresponding to the through holes forms the conductive exposed area.

[0014] By forming a through hole on the insulating layer, a certain area of ​​the bottom guard plate can be exposed through the through hole, and the area can be used as a conductive exposed area. The formation method of the conductive exposed area is relatively simple.

[0015] In some embodiments, the battery includes a plurality of battery cells arranged along a first direction, and two sides of two adjacent battery cells close to each other along the first direction correspond to the same conductive exposed area in a third direction, and the first direction is perpendicular to the third direction.

[0016] The number of exposed conductive areas can be reduced, and the insulation between the bottom guard plate and the battery cell can be improved.

[0017] In some embodiments, the battery includes a plurality of battery cells arranged along a second direction, and two sides of two adjacent battery cells close to each other along the second direction correspond to the same conductive exposed area in a third direction, and the second direction is perpendicular to the third direction.

[0018] The number of exposed conductive areas can be reduced, and the insulation between the bottom guard plate and the battery cell can be improved.

[0019] In some embodiments, the electrical connection assembly includes an isolation plate located between the bottom guard plate and the battery cell, the connection piece is provided on the isolation plate, and the isolation plate is provided with a drainage hole for the electrolyte to flow through.

[0020] When the electrolyte of the battery cell leaks, the electrolyte can flow through the isolation plate through the drainage hole of the isolation plate and flow to the conductive exposed area, thereby electrically connecting the connecting piece and the grounding point through the electrolyte and the conductive exposed area.

[0021] In some embodiments, the isolation plate is provided with at least one groove on a side facing the battery cell, the side of the battery cell having the pole is provided corresponding to the groove, and the groove is connected to the drainage hole.

[0022] When the electrolyte of the battery cell leaks, the electrolyte can flow into the groove. As the electrolyte continues to leak, the electrolyte in the groove flows out of the groove through the drainage hole and then flows to the conductive exposed area, so that the connecting piece is electrically connected to the grounding point.

[0023] In some embodiments, the drainage hole passes through the bottom surface and / or side wall of the groove.

[0024] Thus, the electrolyte can flow from the bottom surface and / or side wall of the groove through the drainage hole and the isolation plate, so that the connecting piece is electrically connected to the grounding point.

[0025] In some embodiments, the side of the isolation plate facing the battery cell is provided with ribs, and the ribs surround the grooves.

[0026] The groove forming method is simple and efficient.

[0027] In some embodiments, the ribs include a plurality of first ribs, the length direction of the first ribs is along the first direction, the plurality of first ribs are arranged at intervals along the second direction, two adjacent first ribs along the second direction define two boundaries of the groove along the second direction, and the first direction is perpendicular to the second direction.

[0028] Two adjacent first ribs along the second direction define two boundaries of the groove along the second direction, so that in the second direction, the two first ribs can limit the leaked electrolyte, so that the electrolyte can be collected in the groove and flow out of the groove from the drainage hole, connecting with the conductive exposed area, thereby electrically connecting the connecting piece and the grounding point.

[0029] In some embodiments, along the second direction, two adjacent grooves are separated by the same first rib.

[0030] The number of first ribs is reduced to simplify the manufacturing process.

[0031] In some embodiments, each of the grooves is connected to two drainage holes, one of the drainage holes is located at one end of one of the first ribs along the first direction, and the other drainage hole is located at the other end of the other first rib along the first direction.

[0032] The two drain holes can be spaced farther apart, so that when electrolyte leaks from different locations of the battery cell, the electrolyte can flow out of the separator from one of the drain holes more quickly.

[0033] In some embodiments, the ribs include a plurality of second ribs, the length direction of the second ribs is along the second direction, the plurality of second ribs are arranged at intervals along the first direction, two adjacent second ribs along the first direction define two boundaries of the groove along the first direction, and the first direction is perpendicular to the second direction.

[0034] The two adjacent second ribs define the two boundaries of the groove along the first direction, so that in the first direction, the two second ribs can limit the leaked electrolyte, so that the electrolyte can be collected in the groove and flow out of the groove from the drainage hole, connecting with the conductive exposed area, thereby electrically connecting the connecting piece and the grounding point.

[0035] In some embodiments, along the first direction, two adjacent grooves are separated by the same second rib.

[0036] The number of second ribs can be reduced, simplifying the manufacturing process.

[0037] In some embodiments, along the second direction, two adjacent grooves are connected to the same drainage hole.

[0038] The number of drainage holes can be reduced, simplifying the manufacturing process.

[0039] In some embodiments, the battery includes multiple rows of battery cells, which are arranged along a first direction, and each row of battery cells includes at least one battery cell. The battery includes an insulating strip, and the length direction of the strip is along a second direction. The two sides of two adjacent battery cells that are close to each other along the first direction are connected to the same strip in a third direction. The strip separates the bottom guard plate and the electrical connection assembly, and the first direction, the second direction and the third direction are perpendicular to each other.

[0040] The two side portions of two adjacent battery cells along the first direction that are close to each other are connected to the same pressure strip in the third direction, and then the side portions of all battery cells are connected together, which is beneficial to improving the rigidity of the battery.

[0041] In some embodiments, the groove includes a first groove and a second groove, the first groove is connected to the drainage hole through the second groove, the depth of the second groove is greater than the depth of the first groove, and the drainage hole is arranged on the bottom surface of the second groove close to the pressure strip.

[0042] On the one hand, the second tank is deeper than the first tank, allowing the second tank to collect the electrolyte in the first tank and the electrolyte in the second tank itself, thereby collecting more electrolyte in the second tank. On the other hand, the drainage hole is located on the bottom of the second tank near the pressure strip, which allows all or most of the electrolyte to be collected in the drainage hole. Combined with these two aspects, the electrolyte is more easily discharged from the drainage hole, shortening the time between electrolyte leakage and the triggering of the insulation alarm function.

[0043] In some embodiments, the electrical connection assembly includes an isolation plate located between the bottom guard plate and the battery cell, the connecting piece is arranged on the isolation plate, and a accommodating groove is provided on the side of the isolation plate facing the bottom guard plate, and the pressure strip is partially located in the accommodating groove.

[0044] The bead is partially located within the accommodating groove, which can reduce the overall height of the bead after connecting to the electrical connection assembly in the vertical direction (the third direction), thereby facilitating the vertical thickness of the battery. When the battery is used in a vehicle, the battery is typically located below the vehicle's passenger compartment. Therefore, a battery with a vertical thickness can reduce the battery's encroachment on the passenger compartment, allowing for more space in the passenger compartment and greater design flexibility.

[0045] In some embodiments, the drainage hole communicates with the accommodating tank and the groove.

[0046] When the electrolyte of the battery cell leaks, the second tank can collect the electrolyte in the first tank and the electrolyte in the second tank itself. The electrolyte in the second tank can be discharged from the drain hole and flow into the containing tank. All or part of the electrolyte can flow along the side wall of the containing tank to the side wall of the layering, and then flow along the side wall of the layering to the through hole of the insulating layer, and then flow to the conductive exposed area through the through hole, thereby electrically connecting the connecting piece to the grounding point. The grounding point and the connecting piece are at the same potential, triggering the insulation alarm function of the battery.

[0047] In some embodiments, the battery includes a buffer layer located between the bead and the bottom guard plate.

[0048] When the bottom of the battery is impacted, the buffer layer can reduce or eliminate the impact transmitted from the bottom guard plate to the battery cell, thereby avoiding damage to the battery cell.

[0049] In some embodiments, the buffer layer is a porous buffer layer, and the buffer layer covers the conductive exposed area.

[0050] On the one hand, when the electrolyte flows directly from the molding to the buffer layer, the buffer layer can absorb the electrolyte, and the electrolyte can be discharged from the through-hole to the conductive exposed area. On the other hand, when the electrolyte drops directly from the molding to the insulating layer, the electrolyte on the insulating layer flows to the buffer layer, and the buffer layer can absorb the electrolyte, and the electrolyte can flow from the through-hole to the conductive exposed area. Furthermore, the porous structure of the buffer layer cooperates with the buffer layer to cover the through-hole, so that the leaked electrolyte can be basically absorbed and collected by the buffer layer and flow from the through-hole to the conductive exposed area, thereby preventing the electrolyte from flowing to other locations.

[0051] In a second aspect, the present application provides an electrical device, which includes a battery according to any one of the above embodiments, and the battery is used to provide electrical energy.

[0052] 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

[0053] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiment below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present application. The same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0054] FIG1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0055] FIG2 is a schematic diagram of the exploded structure of a battery according to some embodiments of the present application;

[0056] FIG3 is a schematic structural diagram of a battery according to some embodiments of the present application;

[0057] FIG4 is another exploded structural diagram of a battery according to some embodiments of the present application;

[0058] FIG5 is a top view of a battery according to some embodiments of the present application;

[0059] FIG6 is a schematic cross-sectional view of the battery of FIG5 along line II;

[0060] FIG7 is an enlarged schematic diagram of a portion A of the battery in FIG6 ;

[0061] FIG8 is an exploded schematic diagram of an electrical connection assembly according to some embodiments of the present application;

[0062] FIG9 is a schematic structural diagram of an insulating layer in some embodiments of the present application;

[0063] FIG10 is a partially exploded schematic diagram of a battery according to some embodiments of the present application;

[0064] FIG11 is an enlarged schematic diagram of part B of the battery in FIG10 ;

[0065] FIG12 is an enlarged schematic diagram of a portion D of the battery in FIG10 ;

[0066] FIG13 is a top view of an isolation plate according to some embodiments of the present application;

[0067] FIG. 14 is an enlarged schematic diagram of portion C of the isolation plate of FIG. 13 .

[0068] The accompanying drawings in the specific implementation manner are as follows:

[0069] Vehicles 1000;

[0070] Battery 100, controller 200, motor 300;

[0071] Box body 10, first part 11, second part 12, accommodating space 101, bottom guard plate 102, conductive exposed area 1021, insulating layer 103, through hole 104, frame 105, carrying plate 106, battery compartment 107, control compartment 108, liquid cooling compartment 109, accommodating tank 110;

[0072] Battery cell 20, left shoulder 201, right shoulder 202;

[0073] Electrical connection assembly 30, connecting piece 301, isolation plate 302, groove 303, drainage hole 304, mounting hole 305, sampling assembly 306, rib 307, first rib 308, second rib 309, first hole 310, second hole 311, first slot 312, second slot 313, accommodating slot 314;

[0074] Layering 40;

[0075] Buffer layer 50 . DETAILED DESCRIPTION

[0076] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0077] 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.

[0078] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0079] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment 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.

[0080] 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.

[0081] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0082] 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., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and 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 device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0083] 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; 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.

[0084] Currently, market developments indicate that power batteries are becoming increasingly widely used. They 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 vehicles, as well as in military equipment and aerospace. As power battery applications continue to expand, market demand is also growing.

[0085] In related technologies, battery cells can leak electrolyte due to production process defects or external loads. When the battery cell is inverted, the electrolyte can easily leak onto the high-voltage bar, forming a loop. If not repaired immediately, this can easily cause a high-voltage ignition, leading to a safety accident. Related technologies use a separate electrolyte leak detection sensor within the battery case to detect the gas solubility of the volatile electrolyte inside the case, promptly identifying leaks and triggering an alarm for repairs. However, this approach is costly due to the additional leakage sensor and corresponding detection circuitry.

[0086] Based on the above considerations, in order to solve the problem of high battery costs caused by the use of leakage sensors, the present application provides a battery, which includes a housing, at least one battery cell, and an electrical connection assembly. A storage space is provided in the housing, the housing includes a bottom guard plate and a grounding point, the bottom guard plate is electrically connected to the grounding point, and a conductive exposed area is provided on the side of the bottom guard plate facing the storage space; the battery cell is stored in the storage space, and the battery cell includes a pole; the electrical connection assembly is stored in the storage space, and the electrical connection assembly includes a connecting piece, which is located between the bottom guard plate and the battery cell and connected to the pole. When the electrolyte in the battery cell leaks, the connecting piece is electrically connected to the grounding point through the electrolyte and the conductive exposed area.

[0087] In such a battery, when the electrolyte of the battery cell leaks, the connecting piece is electrically connected to the grounding point through the electrolyte and the conductive exposed area, which can trigger the insulation alarm function of the battery, realize the leakage detection of the electrolyte, reduce the use of leakage sensors, and reduce the cost of the battery.

[0088] The battery disclosed in the embodiments of the present application can be applied to electrical devices used as power sources or various energy storage systems using batteries as energy storage elements. The electrical devices may be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, battery-powered vehicles, electric vehicles, ships, spacecraft, and the like. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and spacecraft may include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0089] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0090] Please refer to Figure 1, which is a schematic structural diagram of a vehicle 1000 provided in some embodiments of the present application. The 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 100 is provided inside the vehicle 1000, and the battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0091] In some embodiments of the present application, the battery 100 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.

[0092] Please refer to Figure 2, which is an exploded view of a battery 100 provided in some embodiments of the present application. The battery 100 includes a housing 10 and a battery cell 20, and the battery cell 20 is accommodated in the housing 10. The housing 10 is used to provide a storage space 101 for the battery cell 20, and the housing 10 can adopt a variety of structures. In some embodiments, the housing 10 may include a first part 11 and a second part 12, and the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a storage space for accommodating the battery cell 20. The second part 12 can be a hollow structure with one end open, and the first part 11 can be a plate-like structure, and the first part 11 covers the open side of the second part 12, so that the first part 11 and the second part 12 jointly define a storage space; the first part 11 and the second part 12 can also be hollow structures with one side open, and the open side of the first part 11 covers the open side of the second part 12. Of course, the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0093] In the battery 100, there may be multiple battery cells 20, and the multiple battery cells 20 may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 20 may be housed within the housing 10. Alternatively, the battery 100 may be constructed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a complete battery module, and then housed within the housing 10. The battery 100 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0094] Each battery cell 20 may be a secondary battery or a primary battery, and may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be cylindrical, flat, rectangular, or in other shapes.

[0095] According to some embodiments of the present application, please refer to Figures 3 to 14. The embodiments of the present application provide a battery 100, which includes a housing 10, at least one battery cell 20, and an electrical connection assembly 30. The housing 10 is provided with a housing 101. The housing 10 includes a bottom guard plate 102 and a grounding point. The bottom guard plate 102 is electrically connected to the grounding point. A conductive exposed area 1021 is provided on the side of the bottom guard plate 102 facing the housing 101. The battery cell 20 is accommodated in the housing 101. The battery cell 20 includes a terminal. The electrical connection assembly 30 is accommodated in the housing 101. The electrical connection assembly 30 includes a connecting piece 301. The connecting piece 301 is located between the bottom guard plate 102 and the battery cell 20. The connecting piece 301 is connected to the terminal. When the electrolyte in the battery cell 20 leaks, the connecting piece 301 is electrically connected to the grounding point through the electrolyte and the conductive exposed area 1021.

[0096] The present application does not impose any specific restrictions on the material and shape of the box body 10. Optionally, the box body 10 may be a metal box body 10 (such as aluminum alloy or stainless steel, etc.), and the box body 10 is generally in the shape of a rectangular parallelepiped.

[0097] Optionally, the housing 10 further includes a frame 105 and a load-bearing plate 106. The load-bearing plate 106 and the bottom guard plate 102 are respectively connected to the two side surfaces of the frame 105 along the third direction. The load-bearing plate 106 and the frame 105 can be connected into one piece by welding, FDS (Flow Drill Screw), gluing, etc. As the main load-bearing component, the battery cell 20 can be glued to the load-bearing plate 106. The bottom guard plate 102 can be connected to the frame 105 in a detachable manner, including but not limited to bolt connection, snap connection, etc.

[0098] In one embodiment, the battery cell 20 can be installed upside down within the accommodating space 101. This inversion can be understood as meaning that when the battery 100 is installed on an electrical device (such as a vehicle 1000), the terminal and explosion-proof valve of the battery cell 20 are positioned downward. The explosion-proof valve and terminal of the inverted battery cell 20 facing downward can reduce the risk to the passenger compartment in the event of a high-voltage ignition or thermal runaway. When installing the battery cell 20, the support plate 106 and frame 105 can be first secured together. The frame 105 has an upward-facing mounting opening on the side facing away from the support plate 106. The battery cell 20 is then mounted upright on the support plate 106 through the mounting opening and the two are attached together using adhesive. The bottom guard plate 102 is then secured to the frame 105. The housing 10 is then inverted, with the bottom guard plate 102 positioned below the frame 105 and the support plate 106 above it. When the housing 10 is inverted, the battery cells 20 can be inverted, with the terminals and explosion-proof valve facing downward. It should be understood that the above installation process should not be construed as limiting the scope of protection of this application. In one embodiment, the battery cells 20 can be installed upright within the accommodating space 101.

[0099] Optionally, the accommodating space 101 is divided into three subspaces: a battery compartment 107, a control compartment 108, and a liquid cooling compartment 109. The battery 100 also includes a control component and a liquid cooling component, and the battery cell 20 is accommodated in the battery compartment 107. The control component can be accommodated in the control compartment 108, and the liquid cooling component can be accommodated in the liquid cooling compartment 109. The control component is electrically connected to the battery cell 20, and the control component is also electrically connected to the electrical load and the power supply to control the discharge and charging of the battery cell 20. The control component may include a main control box, and the main control box may include a battery 100 management system. The liquid cooling component may include a liquid cooling connector. The liquid cooling connector can be connected to a liquid cooling device outside the battery 100, so that the liquid cooling device dissipates heat from the battery 100.

[0100] At least one battery cell 20 is provided in the accommodating space 101. In Figure 4, a plurality of battery cells 20 are provided in the battery compartment 107, and the plurality of battery cells 20 are arranged along the first direction and the second direction. Optionally, the plurality of battery cells 20 arranged along the second direction constitute a row of battery cells 20. Multiple rows of battery cells 20 are arranged along the first direction. The first direction, the second direction, and the third direction are perpendicular to each other. In Figure 4, the first direction is the left-right direction, the second direction is the front-back direction, and the third direction is the up-down direction. It is understood that in other embodiments, the first direction, the second direction, and the third direction may also be other directions, and this application does not specifically limit this. It is understood that in other embodiments, each row of battery cells 20 may include one battery cell 20. In other embodiments, one battery cell 20 may be provided in the accommodating space 101.

[0101] The battery cell 20 includes two shoulders. A shoulder can be understood as the portion of the first side of the battery cell 20, located between the first side and the second side proximal to the first side, on the first side of the battery cell 20 having the terminal. The second side is perpendicular to the first side. Referring to Figures 6 and 7 , the first side is the bottom side of the battery cell 20, and the second side includes the left and right sides. The battery cell 20 includes a left terminal and a right terminal. The two shoulders of the battery cell 20 include a left shoulder 201 and a right shoulder 202. The left shoulder 201 is the portion of the bottom side located between the left terminal and the left side, and the right shoulder 202 is the portion of the bottom side located between the right terminal and the right side.

[0102] The electrical connection assembly 30 can electrically connect the battery cells 20. Specifically, a battery cell 20 includes two poles, and each pole is welded to a corresponding connecting piece 301. Optionally, the electrical connection assembly 30 also includes an isolation plate 302, and the isolation plate 302 is further provided with a mounting hole 305 on the side facing the battery cell 20. Each connecting piece 301 corresponds to a mounting hole 305 and is connected to the pole through the mounting hole 305. The mounting hole 305 can limit the connecting piece 301. Optionally, the connecting piece 301 can connect a row of battery cells 20 in series to form an energy block, and energy blocks of different rows can be connected in parallel through the connecting piece 301, thereby forming a series-parallel connection of the battery cells 20. It can be understood that the present application does not specifically limit the electrical connection method of the battery cell 20. Optionally, the connecting piece 301 can be an aluminum bar.

[0103] Optionally, referring to FIG8 , the electrical connection assembly 30 further includes a sampling assembly 306, which is fixed to the isolation plate 302. The sampling assembly 306 can collect battery information such as temperature and voltage information of the corresponding battery cell 20 through the connecting piece 301. The sampling assembly 306 can be electrically connected to the control assembly and transmit the battery information to the control assembly. The control assembly can control the state of the battery cell 20 based on the battery information, for example, controlling the charging, discharging, cooling, heating, and shutting down of the battery cell 20.

[0104] Optionally, the conductive exposed area 1021 is the area of ​​the bottom guard plate 102 facing the accommodating space 101. The conductive exposed area 1021 is conductive, and other areas of the bottom guard plate 102 facing the accommodating space 101 may be insulated to insulate the bottom guard plate 102 from the battery cells 20. If electrolyte leaks from the battery cells 20, the connecting piece 301 and the ground point can be electrically connected through the electrolyte and the conductive exposed area 1021, thereby equipotentialating the ground point and the connecting piece 301.

[0105] In the battery 100 or electrical device of the present application, since the bottom guard plate 102 is a conductive metal, the bottom guard plate 102 is electrically connected to the grounding point, and then has the same potential as the electrical device (such as the vehicle body). The high voltage of the battery cell at the electrolyte leakage location (such as the connecting piece 301) is connected to the grounding point, which can trigger the insulation alarm of the battery 100 itself, and then notify after-sales personnel to perform maintenance.

[0106] In summary, in the technical solution of the embodiment of the present application, when the electrolyte of the battery cell 20 leaks, the connecting piece 301 is electrically connected to the grounding point through the electrolyte and the conductive exposed area 1021, thereby triggering the insulation alarm function of the battery 100, realizing electrolyte leakage detection, reducing the use of leakage sensors, and reducing the cost of the battery 100.

[0107] According to some embodiments of the present application, optionally, an insulating layer 103 is provided between the bottom guard plate 102 and the connecting piece 301 , and the insulating layer 103 is provided with a through hole 104 along the thickness direction, and the area corresponding to the bottom guard plate 102 and the through hole 104 forms a conductive exposed area 1021 .

[0108] Alternatively, the insulating layer 103 may be formed by spraying an insulating coating on the bottom guard plate 102. Alternatively, the insulating layer 103 may be formed by an insulating sheet or film attached to the bottom guard plate 102, or by an insulating plate installed between the bottom guard plate 102 and the connecting piece 301. This application does not impose any specific restrictions on this.

[0109] This application does not specifically limit the shape and material of the insulating layer 103. For an insulating sheet, insulating film, or insulating plate, the insulating layer 103 can optionally be a flat rectangular parallelepiped. The insulating layer 103 can be made of plastic, mica, or other materials. The insulating layer 103 primarily serves to provide electrical isolation when the bottom guard plate 102 deforms and contacts the connecting piece 301 when the battery 100 is struck by a ball from below, preventing short circuits and sparks.

[0110] Through-hole 104 can expose an area of ​​bottom guard plate 102, which can be conductive exposed area 1021. This application does not specifically limit the number and shape of through-hole 104. Optionally, through-hole 104 can be a square hole. Specifically, if electrolyte leaks from battery cell 20, the electrolyte can flow into through-hole 104 and contact conductive exposed area 1021, electrically connecting connecting piece 301 to the ground point.

[0111] Optionally, the bottom guard plate 102 is provided with a receiving groove 110 , and the receiving groove 110 can pre-position the insulating layer 103 to facilitate the installation of the insulating layer 103 .

[0112] By forming a through hole 104 on the insulating layer 103 , the through hole 104 can expose a certain area of ​​the bottom guard plate 102 , which can be used as a conductive exposed area 1021 . The conductive exposed area 1021 is formed in a relatively simple manner.

[0113] According to some embodiments of the present application, optionally, the battery 100 includes a plurality of battery cells 20 arranged along a first direction, and the two sides of two adjacent battery cells 20 close to each other along the first direction correspond to the same conductive exposed area 1021 in a third direction, and the first direction is perpendicular to the third direction.

[0114] Alternatively, in FIG4 , the first direction is the left-right direction, and the third direction is the up-down direction. That is, the battery 100 includes a plurality of battery cells 20 arranged in the left-right direction. The two sides of two adjacent battery cells 20 in the left-right direction that are close to each other are the right shoulder 202 of the left battery cell 20 and the left shoulder 201 of the right battery cell 20. The right shoulder 202 of the left battery cell 20 and the left shoulder 201 of the right battery cell 20 correspond to the same conductive exposed area 1021 in the up-down direction.

[0115] In two battery cells 20 corresponding to the same conductive exposed area 1021 in the upper and lower directions, when electrolyte leaks from any battery cell 20 , the connecting piece 301 of the leaking battery cell 20 and the grounding point can be electrically connected through the electrolyte and the conductive exposed area 1021 .

[0116] In this way, the number of the conductive exposed areas 1021 can be reduced, and the insulation between the bottom guard plate 102 and the battery cells 20 can be improved.

[0117] According to some embodiments of the present application, optionally, the battery 100 includes a plurality of battery cells 20 arranged along the second direction, and the two sides of two adjacent battery cells 20 close to each other along the second direction correspond to the same conductive exposed area 1021 in the third direction, and the second direction is perpendicular to the third direction.

[0118] Alternatively, in FIG4 , the second direction is the front-to-back direction, and the third direction is the up-to-down direction. That is, the battery 100 includes a plurality of battery cells 20 arranged in the front-to-back direction. The two sides of two adjacent battery cells 20 that are close to each other in the front-to-back direction may be the left shoulder 201 of the front battery cell 20 and the left shoulder 201 of the rear battery cell 20. The left shoulder 201 of the front battery cell 20 and the left shoulder 201 of the rear battery cell 20 correspond to the same conductive exposed area 1021 in the up-to-down direction. The two sides of two adjacent battery cells 20 that are close to each other in the front-to-back direction may also be the right shoulder 202 of the front battery cell 20 and the right shoulder 202 of the rear battery cell 20. The right shoulder 202 of the front battery cell 20 and the right shoulder 202 of the rear battery cell 20 correspond to the same conductive exposed area 1021 in the up-to-down direction.

[0119] In two battery cells 20 corresponding to the same conductive exposed area 1021 in the upper and lower directions, when electrolyte leaks from any battery cell 20 , the connecting piece 301 of the leaking battery cell 20 and the grounding point can be electrically connected through the electrolyte and the conductive exposed area 1021 .

[0120] In this way, the number of the conductive exposed areas 1021 can be reduced, and the insulation between the bottom guard plate 102 and the battery cells 20 can be improved.

[0121] According to some embodiments of the present application, optionally, the electrical connection assembly 30 includes an isolation plate 302 located between the bottom guard plate 102 and the battery cell 20, the connecting piece 301 is provided on the isolation plate 302, and the isolation plate 302 is provided with a drainage hole 304 for electrolyte to flow through.

[0122] The isolation plate 302 can provide a fixed structure for the connecting piece 301 and the sampling assembly, as well as separate the battery cell 20 from the bottom guard plate 102. Optionally, in one embodiment, the isolation plate 302 can be located between the insulating layer 103 and the battery cell 20. When electrolyte leaks from the battery cell 20, the electrolyte can flow through the isolation plate 302 through the drainage holes 304 in the isolation plate 302 and flow to the conductive exposed area 1021, thereby electrically connecting the connecting piece 301 and the ground point through the electrolyte and the conductive exposed area 1021.

[0123] The isolation plate 302 may be made of an insulating material. Optionally, the isolation plate 302 may be an isolation plate 302 of an integral structure.

[0124] According to some embodiments of the present application, optionally, at least one groove 303 is provided on the side of the isolation plate 302 facing the battery cell 20 , and the side of the battery cell 20 having the pole is provided corresponding to the groove 303 , and the groove 303 is connected to the drainage hole 304 .

[0125] Optionally, one groove 303 may correspond to one battery cell 20 , or two or more grooves 303 may correspond to one battery cell 20 , or one groove 303 may correspond to two or more battery cells 20 , which is not specifically limited in this application.

[0126] The present application does not impose any specific limitation on the shape of the groove 303. Optionally, the groove 303 may be square.

[0127] Alternatively, in Figure 11 , the mounting hole may pass through the bottom surface of the groove 303. The connecting piece 301 is connected to the pole from the bottom surface of the groove 303. Each connecting piece 301 corresponds to a mounting hole 305 and is connected to the pole through the mounting hole 305.

[0128] Optionally, the isolation plate 302 is provided with a plurality of grooves 303 on the side facing the battery cell 20, and the side of the battery cell 20 having the pole (such as the lower side in Figure 7) is provided in a one-to-one correspondence with the groove 303. In one embodiment, the side of the battery cell 20 having the pole is also provided with an explosion-proof valve. The explosion-proof valve can be located between the two poles. When the explosion-proof valve sprays electrolyte, the electrolyte can be sprayed directly into the groove 303, so that the electrolyte can flow to the bottom guard plate 102 faster, shortening the time from electrolyte leakage to the triggering of the insulation alarm function. Optionally, the side of the battery cell 20 having the pole can be accommodated in the groove 303, further shortening the above-mentioned time.

[0129] When the electrolyte of the battery cell 20 leaks, the electrolyte can flow into the groove 303. As the electrolyte continues to leak, the electrolyte in the groove 303 flows out of the groove 303 through the drainage hole 304 and then flows to the conductive exposed area 1021, so that the connecting piece 301 is electrically connected to the ground point.

[0130] The groove 303 can collect the leaked electrolyte, making it easier for the electrolyte to flow out from the drain hole 304 .

[0131] According to some embodiments of the present application, optionally, the drainage hole 304 passes through the bottom surface and / or side wall of the groove 303 .

[0132] Optionally, in one embodiment, the drainage hole 304 passes through the side wall of the groove 303. When the electrolyte of the battery cell 20 leaks, the electrolyte flowing to the side wall of the groove 303 can flow along the drainage hole 304 through the isolation plate 302 and flow to the conductive exposed area 1021, so that the connecting piece 301 is electrically connected to the grounding point.

[0133] Optionally, in one embodiment, the drainage hole 304 extends through the bottom surface of the groove 303. When electrolyte leaks from the battery cell 20, the electrolyte flowing to the bottom surface of the groove 303 can flow through the isolation plate 302 along the drainage hole 304 and flow to the conductive exposed area 1021, electrically connecting the connecting piece 301 to the ground point.

[0134] Alternatively, in one embodiment, as shown in FIG12 , drainage holes 304 extend through the bottom and sidewalls of the recess 303. When electrolyte leaks from the battery cell 20, the electrolyte flowing to the sidewalls of the recess 303 can flow through the separator 302 via the drainage holes 304. The electrolyte flowing to the bottom of the recess 303 can also flow through the separator 302 via the drainage holes 304 and onto the conductive exposed area 1021, electrically connecting the connecting piece 301 to the ground point.

[0135] Thus, the electrolyte can flow from the bottom surface and / or side wall of the groove 303 through the drainage hole 304 and pass through the isolation plate 302, so that the connecting piece 301 is electrically connected to the ground point.

[0136] According to some embodiments of the present application, optionally, a rib is provided on a side of the isolation plate 302 facing the battery cell 20 , and the rib forms a groove 303 .

[0137] Optionally, the isolation plate 302 may be an integrally formed structure. When the isolation plate is integrally manufactured, the ribs 307 may be formed, and the ribs 307 may enclose the grooves 303. Thus, the grooves 303 may be formed in a simple and efficient manner.

[0138] According to some embodiments of the present application, optionally, the rib 307 includes a plurality of first ribs 308, the length direction of the first rib 308 is along the first direction, the plurality of first ribs 308 are arranged at intervals along the second direction, two adjacent first ribs 308 along the second direction define two boundaries of the groove 303 along the second direction, and the first direction is perpendicular to the second direction.

[0139] Alternatively, referring to FIG4 , the first direction is the left-right direction, and the second direction is the front-back direction. That is, the length direction of the first rib 308 is along the left-right direction, and the plurality of first ribs 308 are spaced apart along the front-back direction. Two adjacent first ribs 308 along the front-back direction define the two boundaries of the groove 303 along the front-back direction.

[0140] Two adjacent first ribs 308 along the second direction define two boundaries of the groove 303 along the second direction, so that in the second direction, the two first ribs 308 can limit the leaked electrolyte, so that the electrolyte can be collected in the groove 303 and flow out of the groove 303 from the drainage hole 304, connecting with the conductive exposed area 1021, thereby electrically connecting the connecting piece 301 and the grounding point.

[0141] According to some embodiments of the present application, optionally, along the second direction, two adjacent grooves 303 are separated by the same first rib 308 .

[0142] 4 , the second direction is the front-to-back direction. Along the front-to-back direction, two adjacent grooves 303 are separated by the same first rib 308 , thereby reducing the number of first ribs 308 and simplifying the manufacturing process.

[0143] According to some embodiments of the present application, optionally, each groove 303 is connected to two drainage holes 304, one drainage hole 304 is located at one end of one of the first ribs 308 along the first direction, and the other drainage hole 304 is located at the other end of the other first rib 308 along the first direction.

[0144] Alternatively, referring to Figures 4 and 12 to 14 , the groove 303 may be substantially square, with one drainage hole 304 located at the right end of the front first rib 308 and the other drainage hole 304 located at the left end of the rear first rib 308. Thus, the two drainage holes 304 can be spaced farther apart, allowing the electrolyte to flow out of the separator more quickly through one of the drainage holes 304 when electrolyte leaks from different locations of the battery cell 20.

[0145] It can be understood that in other embodiments, the number of drainage holes 304 connected to each groove 303 is not limited to two, and can also be one, or more than two, and this application does not make specific limitations on this.

[0146] According to some embodiments of the present application, optionally, the rib 307 includes a plurality of second ribs 309, the length direction of the second rib 309 is along the second direction, the plurality of second ribs 309 are arranged at intervals along the first direction, and two adjacent second ribs 309 along the first direction define two boundaries of the groove 303 along the first direction, and the first direction is perpendicular to the second direction.

[0147] Alternatively, referring to FIG4 , the first direction is the left-right direction, and the second direction is the front-back direction. That is, the length direction of the second rib 309 is along the front-back direction, and the plurality of second ribs 309 are arranged at intervals along the left-right direction. Two adjacent second ribs 309 along the left-right direction define the two boundaries of the groove 303 along the left-right direction.

[0148] The two adjacent second ribs 309 define the two boundaries of the groove 303 along the first direction, so that in the first direction, the two second ribs 309 can limit the leaked electrolyte, so that the electrolyte can be collected in the groove 303 and flow out of the groove 303 from the drainage hole 304, connecting with the conductive exposed area 1021, thereby electrically connecting the connecting piece 301 and the grounding point.

[0149] 12 to 14 , the boundary of a groove 303 may be defined by two second ribs 309 spaced apart along the first direction and two first ribs 308 spaced apart along the second direction. The first rib 308 and the second rib 309 are substantially perpendicular to each other, which is also beneficial to increasing the structural strength of the isolation plate 302 .

[0150] Optionally, the length of the second rib 309 along the second direction may be substantially the same as the length of each row of battery cells 20 .

[0151] According to some embodiments of the present application, optionally, along the first direction, two adjacent grooves 303 are separated by the same second rib 309 .

[0152] 4 , the first direction is the left-right direction. Along the left-right direction, two adjacent grooves 303 are separated by the same second rib 309 , thereby reducing the number of second ribs 309 and simplifying the manufacturing process.

[0153] According to some embodiments of the present application, optionally, along the second direction, two adjacent grooves 303 are connected to the same drainage hole 304 .

[0154] 4 , the second direction is the front-to-back direction, and along the front-to-back direction, two adjacent grooves 303 are connected to the same drainage hole 304. This can reduce the number of drainage holes 304 and simplify the manufacturing process.

[0155] Referring to Figure 12 , the drainage holes 304 are located at the left rear position of the front groove 303 and at the left front position of the rear groove 303. When the two grooves 303 are connected to the drainage holes 304, electrolyte leaking from either groove 303 can flow out of the isolation plate through the drainage holes 304 and flow to the conductive exposed area 1021, electrically connecting the connecting piece 301 to the ground point.

[0156] Alternatively, in FIG. 11 , the drainage hole 304 may include a first hole 310 and a second hole 311 , wherein the first hole 310 is located between the first rib 308 and the second rib 309 , and the second hole 311 is provided on a side panel of the second rib 309 facing the first rib 308 .

[0157] The drainage hole 304 separates the first rib 308 from the second rib 309. When electrolyte leaks from the battery cell 20, the electrolyte will flow from the center of the groove 303 to the sidewalls of the groove 303. Because the groove 303 is surrounded by the ribs 307, the sidewalls of the groove 303 are part of the ribs 307. The electrolyte flowing to the sidewalls of the groove 303 can flow along the extension direction of the first rib 308 and the second rib 309. The drainage hole 304 separates the first rib 308 from the second rib 309, so that whether the electrolyte flows along the first rib 308 or the second rib 309 can flow to the drainage hole 304, further shortening the time from electrolyte leakage to the triggering of the insulation alarm function.

[0158] According to some embodiments of the present application, optionally, the battery 100 includes multiple rows of battery cells 20, and the multiple rows of battery cells 20 are arranged along a first direction, each row of battery cells 20 includes at least one battery cell 20, and the battery 100 includes an insulating strip 40, the length direction of the strip 40 is along a second direction, and the two sides of two adjacent battery cells 20 that are close to each other along the first direction are connected to the same strip 40 in a third direction, and the strip 40 separates the bottom guard plate 102 and the electrical connection assembly 30, and the first direction, the second direction and the third direction are perpendicular to each other.

[0159] 4 , the first direction is the left-right direction, the second direction is the front-back direction, and the third direction is the top-bottom direction. That is, the two sides of two adjacent battery cells 20 along the left-right direction are connected to the same pressure strip 40 in the top-bottom direction.

[0160] The bead 40 is insulated and can optionally be an integral structural member. The bead 40 can separate the electrical connection assembly 30 from the insulating layer 103. Referring to Figure 7 , the two adjacent sides of two battery cells 20 in the left-right direction are the right shoulder 202 of the left battery cell 20 and the left shoulder 201 of the right battery cell 20. The right shoulder 202 of the left battery cell 20 and the left shoulder 201 of the right battery cell 20 are connected to the same bead 40 in the vertical direction.

[0161] Optionally, along the second direction, the length of the bead 40 is approximately the same as the length of each row of battery cells 20. In Figure 7 , the bead 40 connects to the sides of the battery cells 20 via the separator 302. In the third direction, the bead 40 corresponds to the second rib 309. Two adjacent rows of battery cells 20 can be connected together by the same bead 40, thereby connecting the sides of all battery cells 20 together, which helps to improve the rigidity of the battery 100.

[0162] Optionally, in the third direction, the orthographic projection of the bead 40 on the insulating layer 103 overlaps with the through hole 104. Further, optionally, in the third direction, the through hole 104 is located within the orthographic projection range of the bead 40 on the insulating layer 103, or does not exceed the orthographic projection range of the bead 40 on the insulating layer 103. Referring to FIG. 7 , the width of the through hole 104 is W, the width of the bead 40 is D, and 0 <W≤D。

[0163] According to some embodiments of the present application, optionally, the groove 303 includes a first groove 312 and a second groove 313, the first groove 312 is connected to the drainage hole 304 through the second groove 313, the depth of the second groove 313 is greater than the depth of the first groove 312, and the drainage hole 304 is arranged at a position near the pressure strip 40 on the bottom surface of the second groove 313.

[0164] Optionally, the bottom surface of the second groove 313 near the bead 40 can be the lowest point of the groove 303 near the bead 40. The drainage hole 304 is located at this lowest point, so that all or most of the electrolyte can be collected at the drainage hole 304. Specifically, in the third direction, most of the orthographic projection of the battery cell 20 on the separator 302 corresponds to the first groove 312, and a small part corresponds to the second groove 313. When the electrolyte of the battery cell 20 leaks, the electrolyte can fall into the first groove 312 and the second groove 313. The electrolyte in the second groove 313 can flow directly into the drainage hole 304. The electrolyte in the first groove 312 can flow into the second groove 313 and then into the drainage hole 304 through the second groove 313. The electrolyte discharged from the drainage hole 304 can flow to the conductive exposed area 1021 through the through hole 104 on the insulating layer 103, thereby electrically connecting the connecting piece 301 to the ground point.

[0165] On the one hand, the depth of the second groove 313 is greater than that of the first groove 312, allowing the second groove 313 to collect the electrolyte in the first groove 312 and the electrolyte in the second groove 313 itself, thereby collecting a larger amount of electrolyte in the second groove 313. On the other hand, the drainage hole 304 is located on the bottom surface of the second groove 313 near the pressure strip 40, allowing all or most of the electrolyte to be collected at the drainage hole 304. Combined with these two aspects, the electrolyte is more easily discharged from the drainage hole 304, shortening the time between electrolyte leakage and the triggering of the insulation alarm function.

[0166] According to some embodiments of the present application, optionally, the electrical connection assembly 30 includes an isolation plate 302 located between the bottom guard plate 102 and the battery cell 20, the connecting piece 301 is arranged on the isolation plate 302, and the side of the isolation plate 302 facing the bottom guard plate is provided with a receiving groove 314, and the pressure strip 40 is partially located in the receiving groove 314.

[0167] Optionally, in FIG7 , an insulating layer 103 is provided between the bottom guard plate 102 and the isolation plate 302. The side of the isolation plate 302 facing the bottom guard plate 102 is the side of the isolation plate 302 facing the insulating layer 103, which is the lower side. The lower side of the isolation plate 302 is provided with a receiving groove 314. The pressure strip 40 is partially located in the receiving groove 314. This can reduce the overall height of the pressure strip 40 after being connected to the electrical connection assembly 30 in the vertical direction (the third direction), thereby facilitating the thinning of the battery 100 in the vertical direction. When the battery 100 is used in the vehicle 1000, the battery 100 is usually located below the passenger compartment of the vehicle 1000. Therefore, the battery 100 that is thinned in the vertical direction can reduce the space occupied by the battery 100 in the passenger compartment, making the passenger compartment space larger and the design more flexible.

[0168] In the embodiment shown in Figure 7, in the third direction, the accommodating groove 314 corresponds to the second rib 309, and the accommodating groove 314 is surrounded by the bottom surface of the second rib 309 protruding upward. Therefore, the isolation plate 302 can form the accommodating groove 314 on the lower side while forming the second rib 309 on the upper side, which is beneficial to simplify the structure of the isolation plate 302 and improve manufacturing efficiency.

[0169] According to some embodiments of the present application, optionally, the drainage hole 304 communicates with the accommodating groove 314 and the recess 303 .

[0170] Specifically, the drainage hole 304 can pass through a side wall of the accommodating groove 314, thereby connecting the accommodating groove 314 and the groove 303. In Figure 11, the drainage hole 304 passes through the side plate of the second rib 309 toward the first rib 308, so that the second groove 313 of the groove 303 is connected to the accommodating groove 314.

[0171] When the electrolyte of the battery cell 20 leaks, the second groove 313 can collect the electrolyte in the first groove 312 and the electrolyte in the second groove 313 itself. The electrolyte in the second groove 313 can be discharged from the drain hole 304 and flow into the receiving groove 314. All or part of the electrolyte can flow along the side wall of the receiving groove 314 to the side wall of the pressure strip 40, and then flow along the side wall of the pressure strip 40 to the through hole 104 of the insulating layer 103, and then flow through the through hole 104 to the conductive exposed area 1021, thereby electrically connecting the connecting piece 301 to the grounding point. The grounding point and the connecting piece 301 are at the same potential, triggering the insulation alarm function of the battery 100.

[0172] According to some embodiments of the present application, optionally, the battery 100 includes a buffer layer 50 , and the buffer layer 50 is located between the molding 40 and the bottom guard plate 102 .

[0173] Optionally, in Figure 7 , an insulating layer 103 is provided between the bottom guard plate 102 and the isolation plate 302, and a buffer layer 50 is positioned between the bead 40 and the insulating layer 103. The buffer layer 50 may be insulating. In one embodiment, a buffer layer 50 is provided below each bead 40. The buffer layer 50 is in the form of an elongated strip, with its length extending along the second direction. The length of the buffer layer 50 is substantially the same as that of the bead 40, so that the entire bead 40 can be pressed against the buffer layer 50.

[0174] Optionally, in one embodiment, a plurality of buffer layers 50 may be disposed under each bead 40. The plurality of buffer layers 50 are connected or spaced apart along the second direction, and the length of the buffer layers 50 is substantially the same as the length of the bead 40. The present application does not specifically limit the number of buffer layers 50 along the third direction (e.g., the vertical direction).

[0175] In some examples, the material of the buffer layer 50 may include but is not limited to foam, rubber, silicone, and other materials that can absorb impact and restore their shape.

[0176] When the bottom of the battery 100 is impacted, the buffer layer 50 can reduce or eliminate the impact transmitted from the bottom guard plate 102 to the battery cell 20 , thereby preventing damage to the battery cell 20 .

[0177] According to some embodiments of the present application, optionally, the buffer layer 50 is a buffer layer 50 with a porous structure, and the buffer layer 50 covers the conductive exposed area 1021 .

[0178] Optionally, in Figure 7, an insulating layer 103 is provided on the bottom guard plate 102, and the insulating layer 103 is provided with a through hole 104. The area of ​​the bottom guard plate 102 corresponding to the through hole 104 is a conductive exposed area 1021, and the buffer layer 50 covers the through hole 104, thereby covering the conductive exposed area 1021.

[0179] The buffer layer 50 is a porous structure and covers the through hole 104. On the one hand, when the electrolyte flows directly from the molding 40 to the buffer layer 50, the buffer layer 50 can absorb the electrolyte, and the electrolyte can be discharged from the through hole 104 to the conductive exposed area 1021. On the other hand, when the electrolyte drops directly from the molding 40 to the insulating layer 103, the electrolyte on the insulating layer 103 flows to the buffer layer 50. The buffer layer 50 can absorb the electrolyte, and the electrolyte can flow from the through hole 104 to the conductive exposed area 1021. Furthermore, the porous structure of the buffer layer 50 cooperates with the buffer layer 50 to cover the through hole 104, so that the leaked electrolyte is basically absorbed and collected by the buffer layer 50 and flows from the through hole 104 to the conductive exposed area 1021, thereby preventing the electrolyte from flowing to other locations.

[0180] Optionally, the porous buffer layer 50 may be a foam layer. It is understood that the buffer layer 50 may also be a buffer layer 50 with other porous structures, and is not limited to a foam layer.

[0181] In the embodiment shown in Figure 7, the electrolyte leakage path of the battery cell 20 is as follows: electrolyte leakage → connecting piece 301 & isolation plate 302 → drainage hole 304 → pressure strip 40 → buffer layer 50 → through hole 104 of insulating layer 103 → conductive exposed area 1021 of bottom guard plate 102, thereby electrically connecting the connecting piece 301 to the grounding point. When any point on the high-voltage circuit of the battery 100 is connected to the grounding point, the insulation alarm function of the battery 100 itself can be triggered. Therefore, the electrolyte leakage can be alarmed through this structural design, so that relevant personnel (such as after-sales personnel) can handle it in time.

[0182] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery 100 of any of the above solutions, and the battery 100 is used to provide electrical energy to the electrical device.

[0183] The power-consuming device may be any of the aforementioned devices or systems using the battery 100 .

[0184] 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, characterized in that: include: A box body, wherein a housing space is provided in the box body, the box body includes a bottom guard plate and a grounding point, the bottom guard plate is electrically connected to the grounding point, and a conductive exposed area is provided on a side of the bottom guard plate facing the housing space; at least one battery cell, the battery cell being accommodated in the accommodation space, the battery cell comprising a terminal; An electrical connection component is accommodated in the accommodating space, and the electrical connection component includes a connecting piece, which is located between the bottom guard plate and the battery cell, and the connecting piece is connected to the pole. When the electrolyte of the battery cell leaks, the connecting piece is electrically connected to the grounding point through the electrolyte and the conductive exposed area.

2. The battery according to claim 1, characterized in that An insulating layer is provided between the bottom guard plate and the connecting piece. The insulating layer is provided with through holes along the thickness direction. The area of the bottom guard plate corresponding to the through holes forms the conductive exposed area.

3. The battery according to claim 1 or 2, characterized in that The battery includes a plurality of battery cells arranged along a first direction, and two side portions of two adjacent battery cells close to each other along the first direction correspond to the same conductive exposed area in a third direction, and the first direction is perpendicular to the third direction.

4. The battery according to claim 1 or 2, characterized in that The battery includes a plurality of battery cells arranged along a second direction, and two side portions of two adjacent battery cells close to each other along the second direction correspond to the same conductive exposed area in a third direction, and the second direction is perpendicular to the third direction.

5. The battery according to any one of claims 1 to 4, characterized in that: The electrical connection assembly includes an isolation plate located between the bottom guard plate and the battery cell, the connection piece is arranged on the isolation plate, and the isolation plate is provided with a drainage hole for the electrolyte to flow through.

6. The battery according to claim 5, characterized in that The side of the isolation plate facing the battery cell is provided with at least one groove, the side of the battery cell having the pole is provided corresponding to the groove, and the groove is connected to the drainage hole.

7. The battery according to claim 6, characterized in that The drainage hole passes through the bottom surface and / or side wall of the groove.

8. The battery according to claim 6, characterized in that The side of the isolation plate facing the battery cell is provided with ribs, and the ribs surround the groove.

9. The battery according to claim 8, characterized in that The convex ribs include a plurality of first convex ribs, wherein the length direction of the first convex ribs is along the first direction, and the plurality of first convex ribs are arranged at intervals along the second direction. Two adjacent first convex ribs along the second direction define two boundaries of the groove along the second direction, and the first direction is perpendicular to the second direction.

10. The battery according to claim 9, characterized in that Along the second direction, two adjacent grooves are separated by the same first rib.

11. The battery according to claim 10, characterized in that Each of the grooves is connected to two drainage holes, wherein one of the drainage holes is located at one end of one of the first ribs along the first direction, and the other drainage hole is located at the other end of another of the first ribs along the first direction.

12. The battery according to claim 8, characterized in that The convex ribs include a plurality of second convex ribs, the length direction of the second convex ribs is along the second direction, the plurality of second convex ribs are arranged at intervals along the first direction, two adjacent second convex ribs along the first direction define two boundaries of the groove along the first direction, and the first direction is perpendicular to the second direction.

13. The battery according to claim 12, characterized in that Along the first direction, two adjacent grooves are separated by the same second rib.

14. The battery according to any one of claims 8 to 13, characterized in that: Along the second direction, two adjacent grooves are connected to the same drainage hole.

15. The battery according to any one of claims 6 to 14, characterized in that: The battery includes multiple rows of battery cells, which are arranged along a first direction, and each row of battery cells includes at least one battery cell. The battery includes an insulating strip, and the length direction of the strip is along a second direction. The two sides of two adjacent battery cells that are close to each other along the first direction are connected to the same strip in a third direction. The strip separates the bottom guard plate and the electrical connection assembly, and the first direction, the second direction and the third direction are perpendicular to each other.

16. The battery according to claim 15, characterized in that The groove includes a first groove and a second groove, the first groove is connected to the drainage hole through the second groove, the depth of the second groove is greater than the depth of the first groove, and the drainage hole is provided at a position near the pressure strip on the bottom surface of the second groove.

17. The battery according to claim 15, characterized in that The electrical connection assembly includes an isolation plate located between the bottom guard plate and the battery cell, the connecting piece is arranged on the isolation plate, and a receiving groove is provided on the side of the isolation plate facing the bottom guard plate, and the pressure strip is partially located in the receiving groove.

18. The battery according to claim 17, characterized in that The drainage hole communicates with the accommodating tank and the groove.

19. The battery according to claim 15, characterized in that The battery includes a buffer layer, which is located between the pressure strip and the bottom guard plate.

20. The battery according to claim 19, characterized in that The buffer layer is a buffer layer with a porous structure, and the buffer layer covers the conductive exposed area.

21. An electrical device, characterized in that: The battery according to any one of claims 1 to 20 is used to provide electrical energy.

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