Battery and electric device

Abstract

The present application provides a battery and an electric device. The battery comprises a case, battery cells and a protection plate. The case has an accommodating cavity. The case comprises a top wall, the top wall is located on the upper side of the accommodating cavity in the vertical direction, and a flow channel for a heat exchange medium to flow is formed in the top wall. The battery cells are accommodated in the accommodating cavity. The protection plate is provided on the side of the top wall distant from the battery cells and is connected to the top wall. The protection plate can protect the top wall from the upper side, so as to reduce the impact force on the top wall applied from the upper side, thereby reducing deformation of the top wall, improving the uniformity of heat exchange, reducing the risk of heat exchange medium leakage, and improving the reliability of the battery.

Description

Batteries and electrical devices Technical Field

[0001] The present application relates to the technical field of batteries, and more particularly, to a battery and an electrical device. Background Art

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric airplanes, electric boats, electric toy cars, electric toy boats, electric toy airplanes and power tools, etc.

[0003] In the development of battery technology, how to improve battery reliability is a research direction in battery technology.

[0004] Summary of the Invention

[0005] The present application provides a battery and an electrical device, which can improve the reliability of the battery.

[0006] In a first aspect, embodiments of the present application provide a battery comprising a housing, a battery cell, and a protective plate. The housing has a receiving cavity. The housing includes a top wall located vertically above the receiving cavity, and a flow channel for a heat exchange medium is defined within the top wall. The battery cell is received in the receiving cavity. The protective plate is disposed on a side of the top wall away from the battery cell and is connected to the top wall.

[0007] The flow channel is formed in the top wall of the box, minimizing the impact on the bottom side of the box. The protective plate protects the top wall from above, reducing impact forces and deformation, improving heat transfer uniformity, reducing the risk of heat transfer medium leakage, and enhancing battery reliability.

[0008] In some embodiments, the battery further includes a reinforcement structure disposed on a side of the protective plate facing away from the top wall and secured to the protective plate. The reinforcement structure can enhance the overall strength of the battery, reduce deformation of the protective plate when subjected to external impact, reduce the risk of the protective plate squeezing the top wall, and thus enhance battery reliability.

[0009] In some embodiments, the reinforcement structure is used to connect to external components. The reinforcement structure of the battery can provide mounting points for some components of the electrical device, thereby reducing the number of parts, improving integration, and simplifying the assembly process.

[0010] In some embodiments, the reinforcement structure includes a beam structure. The beam structure has high strength and can reduce deformation of the protective plate when the protective plate is subjected to external impact.

[0011] In some embodiments, the reinforcement structure includes a mounting plate and a first connector secured to the mounting plate. The mounting plate is secured to the protective plate, and the first connector is configured to connect to an external component. The first connector can provide mounting points for components of the electrical device, thereby reducing component count, improving integration, and simplifying assembly.

[0012] In some embodiments, the housing includes a frame, a heat exchange plate, and a bottom plate. The heat exchange plate and bottom plate are located on the upper and lower sides of the frame in a vertical direction, respectively, and the frame, the heat exchange plate, and the bottom plate define a receiving cavity. The top wall includes the heat exchange plate, which is used to exchange heat with the battery cells.

[0013] Integrating the heat exchange plate into the box can reduce the number of battery components, improve the battery's integration, and increase the battery's energy density.

[0014] In some embodiments, the battery further includes a second connector that connects the protective plate, the heat exchange plate, and the frame. The second connector secures the protective plate and the heat exchange plate to the frame simultaneously, thereby improving the stability of the protective plate and the heat exchange plate.

[0015] In some embodiments, the heat exchange plate includes a first plate and a second plate stacked vertically, with the first plate located vertically below the second plate. The first plate is a flat plate connected to the battery cell, while the second plate is connected to the protective plate. The second plate has a first recessed portion on the side facing the first plate, with the first plate covering the first recessed portion and forming a flow channel. The second plate has a first protrusion formed at a position corresponding to the first recessed portion, with the first protrusion protruding toward the side away from the first plate.

[0016] The first and second plates can be formed independently, allowing for flexible flow channel configuration, reducing the difficulty of forming the heat exchange plate and improving heat transfer uniformity. The first plate's flat surface facilitates the arrangement of battery cells. The provision of the first protrusion increases the depth of the first recess, increasing the flow channel's flow area and minimizing the impact of the first recess on the second plate's strength, thereby improving its reliability.

[0017] In some embodiments, the top wall includes a flow channel area and a non-flow channel area, the flow channel is provided in the flow channel area, and in the vertical direction, a projection of the flow channel area is located within a projection of the protective plate.

[0018] The protective plate can protect the flow channel area from the upper side, thereby reducing the impact force on the flow channel area from the upper side, reducing the deformation of the flow channel area, improving the uniformity of heat exchange, reducing the risk of rupture in the flow channel area, and improving the reliability of the battery.

[0019] In some embodiments, the top wall includes a flow channel area and a non-flow channel area, the flow channel is provided in the flow channel area, and in the vertical direction, the flow channel area is spaced apart from the protective plate.

[0020] When the upper side of the protective plate is under pressure, the protective plate may deform downward; spacing the flow channel area from the protective plate can provide space for the deformation of the protective plate, thereby reducing the risk of the protective plate directly squeezing the flow channel area.

[0021] In some embodiments, the top wall includes a flow channel region and a non-flow channel region, the flow channel is disposed in the flow channel region, the protective plate is fixed to the non-flow channel region, and a second recess is disposed on a side of the protective plate facing the top wall, with the vertical projection of the flow channel region located within the projection of the second recess.

[0022] By providing the second recess, the flow channel area can be avoided, the distance between the bottom surface of the second recess and the flow channel area can be increased, and the risk of the protective plate directly squeezing the flow channel area can be reduced.

[0023] In some embodiments, the non-flow channel region has a first surface facing the protective plate, with at least a portion of the flow channel region protruding from the first surface. The portion of the flow channel region protruding from the first surface is accommodated in the second recess. The second recess can avoid the flow channel region, providing space for the flow channel region, thereby improving space utilization.

[0024] In some embodiments, the protective plate is bonded to the top wall. Bonding the protective plate to the top wall can improve the connection strength between the top wall and the protective plate and enhance the stability of the protective plate.

[0025] In some embodiments, in the vertical direction, the projection of the top wall is located within the projection of the protective plate. The protective plate can completely cover the top wall from above, thereby protecting the top wall and reducing the impact on the top wall.

[0026] In some embodiments, the protective plate includes a base region and a thickened region, wherein the thickness of the thickened region is greater than that of the base region. The thickened region can enhance the local strength of the protective plate; the location of the thickened region can be selected based on the required strength. Compared to solutions where the protective plate is thickened throughout, embodiments of the present application can reduce the weight of the protective plate while still meeting the required strength.

[0027] In some embodiments, the protective plate comprises a metal-plastic composite material, which can have both the mechanical properties of metal and the thermal insulation properties of plastic.

[0028] In some embodiments, the battery further includes a distribution box including a shell containing electrical components, the shell being disposed on a side of the protective plate facing away from the top wall and fixed to the protective plate, and the electrical components being electrically connected to the battery cells.

[0029] The power distribution box is equipped with a protective plate on the side facing away from the top wall. In the event of thermal runaway of a battery cell, the protective plate and top wall protect the box, reducing the risk of damage to electrical components from high-temperature substances released by the battery cells. The top wall also exchanges heat with the power distribution box through the protective plate, thereby regulating the box's temperature. Placing the power distribution box outside the box also improves the utilization of the battery's internal space.

[0030] In some embodiments, the battery cells are fixed to the top wall. The top wall can simultaneously support the battery cells and exchange heat with them. Fixing the battery cells to the top wall can also reduce relative movement between the battery cells and the top wall when the battery is subjected to external impact, thereby improving the stability of the heat exchange between the top wall and the battery cells.

[0031] In some embodiments, the battery cells are bonded to the top wall. The bonding process is simple and has high stability.

[0032] In some embodiments, an electrode terminal and / or a pressure relief mechanism is provided on a side of the battery cell away from the top wall.

[0033] The electrode terminals are usually arranged in a protruding manner. Placing the electrode terminals on the side of the battery cell away from the top wall can reduce the risk of interference between the busbar components connecting the electrode terminals and the top wall, increase the heat exchange area between the battery cell and the top wall, and improve the heat exchange efficiency.

[0034] When thermal runaway occurs in a battery cell, the high-temperature and high-pressure substances released through the pressure relief mechanism will not directly impact the top wall, thereby reducing the risk of melting the top wall and reducing leakage of the heat exchange medium.

[0035] In a second aspect, an embodiment of the present application provides an electrical device, which includes a battery provided according to any embodiment of the first aspect, and the battery is used to provide electrical energy.

[0036] In some embodiments, the electrical device is a vehicle, and the top wall can be embedded in the interior of the vehicle, which can reduce the risk of the top wall being subjected to external impact.

[0037] In some embodiments, the protective plate is at least part of the vehicle's floor. Using the battery protective plate as the floor can save vehicle components, improve vehicle integration, and simplify vehicle assembly. The protective plate can withstand passenger footsteps, reduce deformation of the flow channel, and improve heat transfer uniformity.

[0038] In some embodiments, the vehicle includes a seat connected to a protective plate. The protective plate can support the seat, thereby improving space utilization of the entire vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. 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 the drawings without creative work.

[0040] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application;

[0041] FIG2 is a schematic diagram of an explosion of a battery provided in some embodiments of the present application;

[0042] FIG3 is an exploded schematic diagram of a portion of the structure shown in FIG2 ;

[0043] FIG4 is an exploded schematic diagram of a battery cell of a battery provided in some embodiments of the present application;

[0044] FIG5 is an enlarged schematic diagram of the circle frame in FIG3;

[0045] FIG6 is a partial cross-sectional schematic diagram taken along the AA direction in FIG5;

[0046] FIG7 is a schematic top view of a battery provided in some embodiments of the present application;

[0047] FIG8 is a schematic cross-sectional view taken along the BB direction of FIG7;

[0048] FIG9 is an enlarged schematic diagram of the circle frame of FIG8;

[0049] FIG10 is an enlarged schematic diagram of the frame portion of FIG9 ;

[0050] FIG11 is a schematic top view of a protective plate of a battery provided in some embodiments of the present application;

[0051] FIG12 is a schematic cross-sectional view taken along the CC direction of FIG11;

[0052] FIG13 is an enlarged schematic diagram of the circle frame of FIG12;

[0053] FIG14 is a schematic top view of a protective plate provided in some other embodiments of the present application;

[0054] Figure 15 is a schematic diagram of a partial cross section taken along the DD direction;

[0055] FIG16 is a schematic cross-sectional view of a protective plate provided in some other embodiments of the present application;

[0056] FIG17 is a schematic top view of batteries provided in some other embodiments of the present application;

[0057] FIG18 is a schematic cross-sectional view taken along the EE direction of FIG17;

[0058] FIG19 is an enlarged schematic diagram of the circle frame in FIG18 ;

[0059] FIG20 is an exploded schematic diagram of some components of the battery shown in FIG17 ;

[0060] FIG21 is a schematic diagram of an electrical device provided in some other embodiments of the present application.

[0061] The following are the descriptions of the reference numerals:

[0062] 1. Vehicle; 2. Battery; 3. Controller; 4. Motor; 5. Seat; 6. Seat beam;

[0063] 10. Box body; 10a. Accommodation cavity; 10b. Top wall;

[0064] 11. Heat exchange plate; 111. Flow channel; 112. First plate; 113. Second plate; 113a. First recess; 113b. First protrusion; 114. First surface; 11a. Flow channel region; 11b. Non-flow channel region; 12. Frame; 121. First beam; 122. Second beam; 13. Bottom plate;

[0065] 20. Battery cell; 21. Housing; 211. Battery case; 2111. Housing bottom wall; 212. End cap; 22. Electrode assembly; 23. Electrode terminal; 24. Pressure relief mechanism;

[0066] 30, protective plate; 30a, base area; 30b, thickened area; 30c, metal substrate; 30d, plastic layer; 31, second concave portion; 32, second convex portion; 33, edge portion;

[0067] 40. Reinforcement structure; 41. Beam structure; 42. Mounting plate; 421. Third protrusion; 422. Third recess; 43. First connecting member;

[0068] 50. Distribution box; 51. Housing; 511. Housing opening; 52. Electrical components; 53. Cover plate;

[0069] 60. Second connecting member;

[0070] X, first direction; Y, second direction; Z, vertical direction. DETAILED DESCRIPTION

[0071] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0072] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only 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 drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0073] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the 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.

[0074] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0075] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0076] In the embodiments of this application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components in different embodiments are omitted. It should be understood that the thickness, length, width, and other dimensions of the various components in the embodiments of this application, as well as the overall thickness, length, width, and other dimensions of the integrated device shown in the drawings are merely illustrative and should not constitute any limitation on this application.

[0077] In the embodiments of this application, "parallel" includes not only absolute parallelism but also approximately parallelism as commonly understood in engineering practice. Similarly, "perpendicular" also includes not only absolute perpendicularity but also approximately perpendicularity as commonly understood in engineering practice. For example, if the angle between two directions is 85°-90°, they are considered perpendicular; if the angle between two directions is 0°-5°, they are considered parallel.

[0078] The term "plurality" used in this application refers to two or more (including two).

[0079] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0080] The battery cell may be a secondary battery cell. A secondary battery cell refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0081] The battery cells can be lithium-ion battery cells, sodium-ion battery cells, sodium-lithium-ion battery cells, lithium metal battery cells, sodium metal battery cells, lithium-sulfur battery cells, magnesium-ion battery cells, nickel-hydrogen battery cells, nickel-cadmium battery cells, lead-acid battery cells, etc.

[0082] In some embodiments, the battery further includes a box in which the battery cells are housed. The box can protect the battery cells from the outside, thereby reducing the risk of battery cell failure.

[0083] Battery cells generate heat during the charging and discharging process. When multiple battery cells are used in groups, this heat can accumulate. If this heat is not effectively removed, it will cause the battery cells to heat up and accelerate aging. Furthermore, excessive temperatures can easily lead to thermal runaway, posing a safety hazard. When battery cells are exposed to low temperatures, their service life is shortened and their discharge capacity is weakened.

[0084] In related technologies, independent heat exchange plates are typically installed inside batteries to exchange heat with the battery cells to maintain the battery cell's operating temperature within an appropriate range. Specifically, the heat exchange plates typically have flow channels within them. When an external heat exchange medium flows through these channels, it exchanges heat with the battery cells through the plates to regulate the battery cell's temperature.

[0085] However, independent heat exchange plates take up space, thereby reducing the energy density of the battery.

[0086] In some embodiments, the battery integrates the box body and the heat exchange plate, and uses the heat exchange plate as the box wall of the box body. This can save components, simplify the structure of the battery, and improve energy density.

[0087] During battery use, the housing can withstand external impacts to protect the battery cells. However, if the heat exchange plate is placed on the underside of the battery cells, the risk of external impact on the heat exchange plate is high, affecting the reliability of the heat exchange plate. In view of this, in some embodiments, the heat exchange plate is typically integrated on the upper side of the battery cells to reduce the impact on the heat exchange plate from the underside of the battery cells.

[0088] Because different electrical devices have different usage scenarios, batteries must be adaptable to a variety of harsh usage scenarios when used in these devices. For example, when batteries are used in electric vehicles, if the heat exchange plate is placed on the upper side of the battery cells, the heat exchange plate is prone to uneven flow and leakage when stepped on by passengers, affecting the reliability of the battery cells.

[0089] In view of this, an embodiment of the present application provides a technical solution, which provides a protective plate on the upper side of the box to reduce the impact force from the upper side on the flow channel of the box, reduce the risk of box damage and leakage, and improve the reliability of the battery.

[0090] The battery described in the embodiments of the present application is suitable for use in electrical devices that use the battery.

[0091] Electrical devices may include vehicles, mobile phones, portable devices, laptop computers, ships, spacecraft, electric toys, and electric tools, etc. Vehicles may include fuel vehicles, gas vehicles, or new energy vehicles. New energy vehicles may include pure electric vehicles, hybrid vehicles, or extended-range vehicles, 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 electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical devices.

[0092] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device.

[0093] FIG1 is a schematic structural diagram of a vehicle provided in some embodiments of the present application.

[0094] As shown in FIG1 , a battery 2 is provided inside the vehicle 1. The battery 2 may be provided at the bottom, head, or tail of the vehicle 1. The battery 2 may be used to power the vehicle 1. For example, the battery 2 may serve as an operating power source for the vehicle 1.

[0095] The vehicle 1 may further include a controller 3 and a motor 4 . The controller 3 is used to control the battery 2 to supply power to the motor 4 , for example, to meet the power requirements of the vehicle 1 during startup, navigation, and driving.

[0096] In some embodiments of the present application, the battery 2 can not only serve as the operating power source of the vehicle 1, but also serve as the driving power source of the vehicle 1, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1.

[0097] Figure 2 is an exploded schematic diagram of a battery provided in some embodiments of the present application; Figure 3 is an exploded schematic diagram of a partial structure shown in Figure 2; Figure 4 is an exploded schematic diagram of a battery cell of a battery provided in some embodiments of the present application; Figure 5 is an enlarged schematic diagram of the circle frame in Figure 3; and Figure 6 is a partial cross-sectional schematic diagram of Figure 5 taken along the AA direction.

[0098] 2 to 6 , an embodiment of the present application provides a battery 2 , which includes a housing 10 and a battery cell 20 . The housing 10 has a receiving cavity 10 a , and the battery cell 20 is received in the receiving cavity 10 a .

[0099] In the battery 2 , there can be one or more battery cells 20 . If there are multiple battery cells 20 , the multiple battery cells 20 can be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 20 are connected in both series and in parallel.

[0100] Multiple battery cells 20 can be directly connected in series, in parallel, or mixed together, and then the whole formed by the multiple battery cells 20 can be accommodated in the accommodating cavity 10a; of course, multiple battery cells 20 can also be first connected in series, in parallel, or mixed together to form a battery module, and then multiple battery modules can be connected in series, in parallel, or mixed together to form a whole and accommodated in the accommodating cavity 10a.

[0101] As an example, the battery cell 20 may be a prismatic battery cell, a soft-pack battery cell, or a battery cell of another shape. Prismatic battery cells include square-shell battery cells, blade-shaped battery cells, and polygonal battery cells. Polygonal battery cells are, for example, hexagonal battery cells.

[0102] The box body 10 can be in various shapes, such as a cylinder, a cuboid, etc.

[0103] The material of the box body 10 can be steel, aluminum, aluminum alloy or other materials.

[0104] In some embodiments, the battery cell 20 includes a housing 21 and an electrode assembly 22 , and the electrode assembly 22 is accommodated in the housing 21 .

[0105] The electrode assembly 22 is a component where electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 22 may be contained within the housing 21.

[0106] As an example, the electrode assembly 22 includes a positive electrode sheet and a negative electrode sheet. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 22, while the portions of the positive and negative electrode sheets not containing active material each constitute a tab. The tabs may include a positive tab and a negative tab. The positive and negative tabs may be located together at one end of the main body or separately at opposite ends of the main body.

[0107] During the charge and discharge process of the battery cell 20 , the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs connect the electrode terminals to form a current loop.

[0108] The housing 21 is hollow, forming a space within which the electrode assembly 22 and the electrolyte are housed. The shape of the housing 21 can be determined based on the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a rectangular parallelepiped, a rectangular housing can be used; if the electrode assembly 22 is a cylindrical structure, a cylindrical housing can be used.

[0109] As an example, the housing 21 includes a battery housing 211 and an end cover 212. The battery housing 211 has an opening, and the end cover 212 is used to cover the opening. The end cover 212 is connected to the battery housing 211 by welding, bonding, clamping or other means.

[0110] The battery housing 211 may be open at one end or at both ends. In some examples, the battery housing 211 may be open at one end, with one end cap 212 provided and covering the battery housing 211. In other examples, the battery housing 211 may be open at both ends, with two end caps 212 provided, each covering the two openings of the battery housing 211.

[0111] In some embodiments, the battery cell 20 further includes an electrode terminal 23 . The electrode terminal 23 can be used to electrically connect to the electrode assembly 22 to output or input electrical energy of the battery cell 20 .

[0112] In some embodiments, the electrode terminal 23 is disposed on the battery housing 211 or the end cover 212 .

[0113] In some embodiments, there are two electrode terminals 23, each electrically connected to a tab on the positive electrode sheet and a tab on the negative electrode sheet. The current generated by the electrode assembly 22 can be transmitted externally through the electrode terminals 23, and an external power source can also charge the electrode assembly 22 through the electrode terminals 23.

[0114] In some embodiments, the battery cell 20 further includes a pressure relief mechanism 24 .

[0115] When a short circuit or overcharge occurs, thermal runaway may occur inside the battery cell 20 , causing a sudden increase in the internal pressure of the housing 21 , putting the battery cell 20 at risk of bursting.

[0116] When the internal pressure or temperature of the housing 21 reaches a threshold, the pressure relief mechanism 24 can connect the internal space of the housing 21 with the external space, thereby releasing the internal pressure of the battery cell 20 and reducing the risk of the battery cell 20 bursting.

[0117] The pressure relief mechanism 24 is an element or component that activates to release the internal pressure or temperature of the battery cell 20 when the internal pressure or temperature reaches a predetermined threshold. This threshold varies depending on the design requirements. The threshold may depend on the materials of one or more of the positive electrode sheet, negative electrode sheet, electrolyte, and separator in the battery cell 20. The pressure relief mechanism 24 can take the form of an explosion-proof valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically employ pressure-sensitive or temperature-sensitive elements or structures.

[0118] In some embodiments, the pressure relief mechanism 24 may be disposed on the battery housing 211 or on the end cover 212 .

[0119] In some embodiments, the housing 10 includes a top wall 10b located above the accommodating cavity 10a in the vertical direction Z. A flow channel 111 for heat exchange medium is provided inside the top wall 10b. Exemplarily, the top wall 10b is used to exchange heat with at least the battery cells 20.

[0120] As an example, when the battery 2 is installed in an electrical device, the top wall 10b is located above the accommodating cavity 10a along the vertical direction Z. During the production and transportation of the battery 2, the top wall 10b is not required to be located above the accommodating cavity 10a along the vertical direction Z.

[0121] As an example, the heat exchange medium may be a liquid or a gas, such as water.

[0122] The top wall 10b may be an integrally formed component, or may be formed by connecting a plurality of independently formed components.

[0123] The battery cell 20 may be fixed to the top wall 10 b of the box body 10 , or to the bottom wall of the box body 10 , or to other locations of the box body 10 .

[0124] As an example, the electrode terminals 23 of the battery cells 20 may face the top wall 10 b , the bottom wall, or the side wall of the box body 10 .

[0125] As an example, the pressure relief mechanism 24 of the battery cell 20 may be directed toward the top wall 10 b , the bottom wall, or the side wall of the box body 10 .

[0126] The flow channel 111 is formed on the top wall 10b of the box body 10. When the lower side of the box body 10 is subjected to an external impact, the impact force on the flow channel 111 is small, thereby reducing the deformation of the flow channel 111, improving the uniformity of heat exchange, reducing the risk of heat exchange medium leakage, and improving the reliability of the battery 2.

[0127] In some embodiments, the battery 2 includes a protective plate 30 . The protective plate 30 is disposed on a side of the top wall 10 b away from the battery cells 20 and is connected to the top wall 10 b .

[0128] The protection plate 30 may be connected to the top wall 10 b by bonding, fastener connection, welding, clamping or other methods.

[0129] In the vertical direction Z, the protection plate 30 may cover a portion of the top wall 10 b from the upper side, or may completely cover the top wall 10 b.

[0130] The protection plate 30 may be a plate of uniform thickness or a plate of unequal thickness.

[0131] The material of the protection plate 30 can be metal, plastic, metal-plastic composite material or other materials. Optionally, the metal can be aluminum, aluminum alloy, stainless steel, nickel-plated steel or other materials.

[0132] The protective plate 30 may be an integrally formed plate or may be formed by splicing a plurality of plates.

[0133] In an embodiment of the present application, the protective plate 30 can protect the top wall 10b from the upper side to reduce the impact force on the top wall 10b from the upper side, reduce the deformation of the top wall 10b, improve the uniformity of heat exchange, reduce the risk of heat exchange medium leakage, and improve the reliability of the battery 2.

[0134] In some embodiments, the battery 2 further includes a reinforcement structure 40 . The reinforcement structure 40 is disposed on a side of the protective plate 30 facing away from the top wall 10 b and is fixed to the protective plate 30 .

[0135] The reinforcement structure 40 and the protection plate 30 can be independently formed components, and the two can be fixedly connected by welding, bonding, fastener connection or other methods. Alternatively, the reinforcement structure 40 and the protection plate 30 can also be integrally formed.

[0136] The reinforcement structure 40 may be a plate structure, a beam structure, a rib structure, a convex structure, or other structures, as long as it can enhance the local strength of the protective plate 30 .

[0137] There may be one or more reinforcement structures 40 .

[0138] When the battery 2 is installed in an electrical device, the reinforcement structure 40 may be connected to other components of the electrical device, or may not be connected to other components of the electrical device.

[0139] The reinforcement structure 40 can improve the overall strength of the battery 2 , reduce deformation of the protective plate 30 when the protective plate 30 is subjected to external impact, reduce the risk of the protective plate 30 squeezing the top wall 10 b , and improve the reliability of the battery 2 .

[0140] In some embodiments, the reinforcement structure 40 is used to connect to an external component.

[0141] For example, when the battery 2 is applied to a vehicle, the reinforcement structure 40 may be used to be connected to a seat 5 of the vehicle.

[0142] The reinforcement structure 40 of the battery 2 can provide mounting points for some components of the electrical device, thereby reducing parts, improving integration, and simplifying the assembly process.

[0143] In some embodiments, the reinforcement structure 40 includes a beam structure 41. The beam structure 41 has high strength and can reduce deformation of the protective plate 30 when the protective plate 30 is subjected to external impact.

[0144] For example, the beam structure 41 may serve as a seat beam of a vehicle for mounting the seat 5 .

[0145] In some embodiments, the beam structure 41 is connected to the protection plate 30 by bonding or welding.

[0146] In some embodiments, the beam structure 41 extends along a first direction X. Exemplarily, the first direction X is perpendicular to the vertical direction Z.

[0147] In some embodiments, the beam structure 41 is formed by bending a metal plate.

[0148] In some embodiments, the reinforcement structure 40 includes a plurality of beam structures 41 , and the plurality of beam structures 41 are spaced apart along the second direction Y. Optionally, the first direction X, the second direction Y, and the vertical direction Z are perpendicular to each other.

[0149] In some embodiments, the thickness of the protective plate 30 may be 0.1 mm-50 mm. Optionally, the thickness of the protective plate 30 is 0.4 mm-5 mm.

[0150] As an example, the thickness of the protective plate 30 may be 0.1 mm, 0.2 mm, 0.4 mm, 0.8 mm, 1 mm, 1.5 mm, 2 mm, 3 mm, 4 mm, 5 mm, 8 mm, 10 mm, 15 mm, 20 mm, 35 mm, 40 mm, 45 mm, or 50 mm.

[0151] In this embodiment of the present application, the thickness of the protective plate 30 is limited to greater than or equal to 0.1 mm to increase the structural strength of the protective plate 30 and reduce deformation of the protective plate 30 when stepped on. In this embodiment of the present application, the thickness of the protective plate 30 is limited to less than or equal to 50 mm to reduce the weight and volume of the protective plate 30 and reduce the loss of energy density of the battery 2.

[0152] In some embodiments, the protective plate 30 is bonded to the top wall 10 b . Bonding the protective plate 30 to the top wall 10 b can improve the connection strength between the top wall 10 b and the protective plate 30 and enhance the stability of the protective plate 30 .

[0153] In some embodiments, the protection plate 30 is bonded to the top wall 10 b by structural adhesive.

[0154] In some embodiments, the protection plate 30 and the top wall 10b are further connected by other components, such as fasteners.

[0155] In some embodiments, the battery 2 also includes a distribution box 50, which includes a shell 51 and an electrical component 52 accommodated in the shell 51. The shell 51 is arranged on the side of the protective plate 30 away from the top wall 10b and is fixed to the protective plate 30. The electrical component 52 is electrically connected to the battery cell 20.

[0156] The power distribution box 50 controls the battery 2. As an example, the power distribution box 50 plays a role in protecting the battery 2 and distributing power during the charging and discharging process of the battery 2.

[0157] The power distribution box 50 is provided with a protective plate 30 on the side facing away from the top wall 10b. In the event of thermal runaway of the battery cells 20, the protective plate 30 and the top wall 10b protect the power distribution box 50, reducing the risk of damage to the electrical components 52 from high-temperature substances released from the battery cells 20. The top wall 10b also exchanges heat with the power distribution box 50 through the protective plate 30, thereby regulating the temperature of the power distribution box 50. Placing the power distribution box 50 outside the housing 10 also improves the utilization of the internal space of the battery 2.

[0158] Generally, battery 2 has a relatively high voltage. Directly connecting electrical appliances (such as motor controllers, air conditioning systems, and charging systems) to battery 2 would create a cluttered wiring harness. Therefore, a power distribution box 50 is required to distribute the high voltage to battery 2. Power distribution box 50 utilizes a centralized power distribution solution, offering a compact design, convenient wiring layout, and quick and easy maintenance. Depending on the system architecture requirements of different customers, power distribution box 50 may also integrate portions of the battery management system's intelligent control and management unit, further simplifying the complexity of power distribution across the entire electrical device.

[0159] In some embodiments, the electrical device 52 includes one or more of a fuse, a relay, a resistor, a current sensor, and a battery management component to facilitate control of the battery 2 .

[0160] A fuse is an electrical device that generates heat to melt the fuse and disconnect the circuit when the current exceeds a specified value. A relay is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity (excitation quantity) meets the specified requirements. A current sensor is a detection device that can sense the measured current and convert the sensed information into an electrical signal or other required form of information output according to a certain rule to meet certain standards, thereby meeting the requirements of information transmission, processing, storage, display, recording, and control. The battery management component is designed to intelligently manage and maintain each battery cell 20, reduce the risk of overcharging and over-discharging of the battery 2, extend the service life of the battery 2, and monitor the status of the battery 2.

[0161] Illustratively, the battery management assembly includes a circuit board.

[0162] In some embodiments, the power distribution box 50 is located directly below or behind the rear seat of the vehicle. The power distribution box 50 is arranged below or behind the rear seat of the vehicle, which can greatly utilize the space of the entire vehicle.

[0163] In some embodiments, the housing 51 of the distribution box 50 is fixed to the protective plate 30 by welding.

[0164] In some embodiments, the housing 51 has a housing opening 511 at one end away from the protective plate 30 ; the distribution box 50 further includes a cover plate 53 , which is connected to the housing 51 and covers the housing opening 511 .

[0165] The cover plate 53 can seal the housing 51 , preventing external impurities from entering the housing 51 , and reducing the risk of the electrical components 52 being corroded or damaged by the external impurities.

[0166] In some embodiments, the cover plate 53 is detachably connected to the housing 51. When the electrical device 52 fails, the cover plate 53 can be removed to facilitate maintenance of the electrical device 52.

[0167] In some embodiments, the battery cells 20 are fixed to the top wall 10b. The top wall 10b can simultaneously support the battery cells 20 and exchange heat with the battery cells 20. Fixing the battery cells 20 to the top wall 10b can also reduce relative movement between the battery cells 20 and the top wall 10b when the battery 2 is subjected to external impact, thereby improving the stability of the heat exchange between the top wall 10b and the battery cells 20.

[0168] In some embodiments, the battery cells 20 are bonded to the top wall 10b. The bonding process is simple and has high stability.

[0169] In some embodiments, the battery cells 20 are bonded to the top wall 10b using thermally conductive adhesive. Thermally conductive adhesive has a low thermal resistance, and bonding the battery cells 20 and the top wall 10b using thermally conductive adhesive can improve the heat exchange efficiency between the top wall 10b and the battery cells 20.

[0170] In some embodiments, an electrode terminal 23 is provided on a side of the battery cell 20 away from the top wall 10 b.

[0171] The electrode terminal 23 is usually arranged to protrude from the outer shell 21. Setting the electrode terminal 23 on the side of the battery cell 20 away from the top wall 10b can reduce the risk of interference between the busbar component connected to the electrode terminal 23 and the top wall 10b, increase the heat exchange area between the battery cell 20 and the top wall 10b, and improve the heat exchange efficiency.

[0172] In some embodiments, the two electrode terminals 23 are both disposed on a side of the battery cell 20 away from the top wall 10 b .

[0173] In some embodiments, the battery housing 211 includes a bottom wall 2111 opposite to the end cap 212 , and the bottom wall 2111 is bonded to the top wall 10 b . Two electrode terminals 23 are mounted on the end cap 212 .

[0174] In some embodiments, a pressure relief mechanism 24 is provided on the side of the battery cell 20 away from the top wall 10b. In the event of thermal runaway of the battery cell 20, the high-temperature, high-pressure material released through the pressure relief mechanism 24 will not directly impact the top wall 10b, thereby reducing the risk of melting the top wall 10b and minimizing leakage of the heat exchange medium.

[0175] In some embodiments, the electrode terminal 23 and the pressure relief mechanism 24 are both disposed on a side of the battery cell 20 away from the top wall 10 b .

[0176] In some embodiments, the housing 10 includes a frame 12, a heat exchange plate 11, and a bottom plate 13. The heat exchange plate 11 and bottom plate 13 are respectively located on the upper and lower sides of the frame 12 along the vertical direction Z. The frame 12, the heat exchange plate 11, and the bottom plate 13 define a receiving chamber 10a. The top wall 10b includes the heat exchange plate 11, which is used to exchange heat with the battery cells 20.

[0177] Integrating the heat exchange plate 11 on the box body 10 can reduce the number of components of the battery 2 , improve the integration of the battery 2 , and enhance the energy density of the battery 2 .

[0178] In some embodiments, the battery cells 20 are fixed to the heat exchange plate 11. The bottom plate 13 does not need to support the battery cells 20, which can reduce the strength requirements of the bottom plate 13, thereby reducing the thickness and weight of the bottom plate 13 and improving the energy density of the battery 2.

[0179] In some embodiments, the frame 12 includes two first beams 121 and two second beams 122 . The two first beams 121 are disposed opposite each other along a first direction X, and the two second beams 122 are disposed opposite each other along a second direction Y. The first beam 121 extends along the second direction Y, and both ends of the first beam 121 are connected to the two second beams 122 .

[0180] In some embodiments, the battery 2 further includes a second connector 60 , which connects the protective plate 30 , the heat exchange plate 11 , and the frame 12 .

[0181] The second connecting member 60 fixes the protection plate 30 and the heat exchange plate 11 to the frame 12 at the same time, thereby improving the stability of the protection plate 30 and the heat exchange plate 11 .

[0182] In some embodiments, the second connecting member 60 passes through the protective plate 30 and the heat exchange plate 11 along the vertical direction Z and is fixed to the frame 12 .

[0183] In some embodiments, there are multiple second connecting members 60 , and the multiple second connecting members 60 are spaced apart along the circumference of the frame 12 .

[0184] In some embodiments, the second connecting member 60 may include an FDS (Fused Detapping Screw), a bolt, or other fasteners.

[0185] In some embodiments, the heat exchange plate 11 includes a first plate 112 and a second plate 113 stacked along a vertical direction Z. The first plate 112 is located below the second plate 113 along the vertical direction Z. The first plate 112 is connected to the battery cell 20, and the second plate 113 is connected to the protective plate 30. The flow channel 111 is formed between the first plate 112 and the second plate 113.

[0186] The first plate 112 and the second plate 113 can be formed independently, so that the shape of the flow channel 111 can be flexibly set, the molding difficulty of the heat exchange plate 11 is reduced, and the uniformity of heat exchange is improved.

[0187] In some embodiments, the first plate 112 and the second plate 113 are welded. The weld between the first plate 112 and the second plate 113 is circumferential to improve sealing.

[0188] In some embodiments, the first plate 112 is a flat plate with a flat surface, which facilitates the arrangement of the battery cells 20 .

[0189] In some embodiments, a first recess 113 a is defined on a side of the second plate 113 facing the first plate 112 , and the first plate 112 covers the first recess 113 a and forms the flow channel 111 .

[0190] In some embodiments, the second plate 113 has a first protrusion 113b formed at a position corresponding to the first recess 113a. The first protrusion 113b protrudes toward a side away from the first plate 112. The provision of the first protrusion 113b increases the depth of the first recess 113a, thereby increasing the flow area of ​​the flow channel 111. The provision of the first protrusion 113b also reduces the effect of the first recess 113a on the strength of the second plate 113, thereby improving the reliability of the second plate 113.

[0191] In some embodiments, the shapes of the first convex portion 113b and the first concave portion 113a correspond.

[0192] In some embodiments, the first convex portion 113 b and the first concave portion 113 a may be formed by punching the second plate 113 .

[0193] In some embodiments, the heat exchange plate 11 further includes an inlet and an outlet (not shown), and the flow channel 111 connects the inlet and the outlet. The heat exchange medium can flow into the flow channel 111 through the inlet and flow out through the outlet.

[0194] In some embodiments, the inlet can be provided on the first plate 112 or the second plate 113 . The outlet can be provided on the first plate 112 or the second plate 113 .

[0195] In some embodiments, the second connector 60 passes through the first plate 112 and the second plate 113 .

[0196] Figure 7 is a top view schematic diagram of a battery provided in some embodiments of the present application; Figure 8 is a cross-sectional schematic diagram of Figure 7 taken along the BB direction; Figure 9 is an enlarged schematic diagram of Figure 8 at the circular frame; Figure 10 is an enlarged schematic diagram of Figure 9 at the square frame; Figure 11 is a top view schematic diagram of a protective plate of a battery provided in some embodiments of the present application; Figure 12 is a cross-sectional schematic diagram of Figure 11 taken along the CC direction; Figure 13 is an enlarged schematic diagram of Figure 12 at the circular frame.

[0197] Please refer to FIG. 5 to FIG. 12 . In some embodiments, the top wall 10 b includes a flow channel area 11 a and a non-flow channel area 11 b , and the flow channel 111 is disposed in the flow channel area 11 a .

[0198] Exemplarily, the flow channel area 11 a is a physical area of ​​the top wall 10 b that overlaps with the flow channel 111 in the vertical direction Z, and the non-flow channel area 11 b is a physical area of ​​the top wall 10 b that does not overlap with the flow channel 111 in the vertical direction Z.

[0199] In some embodiments, the non-flow channel region 11b includes the portion where the first plate 112 and the second plate 113 are attached to each other. The flow channel region 11a includes the first protrusion 113b of the second plate 113 and a portion of the first plate 112 corresponding to the first protrusion 113b along the vertical direction Z.

[0200] In some embodiments, in the vertical direction Z, the projection of the flow channel region 11 a is located within the projection of the protection plate 30 .

[0201] The protective plate 30 can protect the flow channel area 11a from the upper side, thereby reducing the impact force on the flow channel area 11a from the upper side, reducing the deformation of the flow channel area 11a, improving the uniformity of heat exchange, reducing the risk of rupture of the flow channel area 11a, and improving the reliability of the battery 2.

[0202] In some embodiments, in the vertical direction Z, the flow channel area 11 a is spaced apart from the protection plate 30 .

[0203] When the upper side of the protective plate 30 is under pressure, the protective plate 30 may deform downward; spacing the flow channel area 11a from the protective plate 30 can provide space for the deformation of the protective plate 30, thereby reducing the risk of the protective plate 30 directly squeezing the flow channel area 11a.

[0204] In some embodiments, the protection plate 30 is fixed to the non-flow channel area 11 b .

[0205] Exemplarily, the protection plate 30 is fixed to the non-flow channel area 11 b by bonding, welding, fastener connection or other means.

[0206] The non-flow channel area 11b is not provided with the flow channel 111. Fixing the protection plate 30 to the non-flow channel area 11b can reduce the force transmitted to the flow channel area 11a and reduce the deformation of the flow channel 111 when the protection plate 30 is impacted.

[0207] In some embodiments, a second recess 31 is provided on a side of the protection plate 30 facing the top wall 10 b , and a projection of the flow channel region 11 a along the vertical direction Z is located within the projection of the second recess 31 .

[0208] Illustratively, along the vertical direction Z, the flow channel region 11 a may protrude upward from the non-flow channel region 11 b , or may protrude downward from the non-flow channel region 11 b .

[0209] By providing the second recess 31 , the flow channel area 11 a can be avoided, the distance between the bottom surface of the second recess 31 and the flow channel area 11 a is increased, and the risk of the protective plate 30 directly squeezing the flow channel area 11 a is reduced.

[0210] In some embodiments, the protective plate 30 includes an edge portion 33 disposed around the second recess 31 and a second protrusion 32. The second protrusion 32 is positioned corresponding to the second recess 31 and protrudes from the side of the edge portion 33 away from the top wall 10b. The provision of the second protrusion 32 increases the depth of the second recess 31 and improves the strength of the protective plate 30.

[0211] In some embodiments, the edge portion 33 abuts against and is fixed to the non-flow channel region 11 b .

[0212] In some embodiments, the second connecting member 60 connects the edge portion 33 , the non-flow channel region 11 b , and the frame 12 .

[0213] In some embodiments, the non-flow channel region 11 b has a first surface 114 facing the protection plate 30 , and at least a portion of the flow channel region 11 a protrudes from the first surface 114 .

[0214] Exemplarily, the first protrusion 113 b of the second plate 113 protrudes from the first surface 114 .

[0215] In some embodiments, the portion of the flow channel region 11a protruding from the first surface 114 is accommodated in the second recess 31. The second recess 31 can avoid the flow channel region 11a, providing space for the flow channel region 11a, thereby improving space utilization.

[0216] In some embodiments, a structural adhesive is disposed in the second recess 31 to bond the flow channel region 11a and the protective plate 30. The structural adhesive bonding the flow channel region 11a and the protective plate 30 can enhance the connection strength between the flow channel region 11a and the protective plate 30 and improve the stability of the battery 2.

[0217] The second recess 31 can limit the structural adhesive and reduce overflow of the structural adhesive.

[0218] The structural adhesive is relatively soft, and when the protective plate 30 is under pressure, the structural adhesive can be deformed to provide space for the deformation of the protective plate 30, thereby reducing the force transmitted to the flow channel area 11a.

[0219] In some embodiments, in the vertical direction Z, the projection of the top wall 10b is located within the projection of the protective plate 30. The protective plate 30 can completely cover the top wall 10b from above, thereby protecting the top wall 10b and reducing the impact on the top wall 10b.

[0220] FIG14 is a schematic top view of a protective plate provided in some other embodiments of the present application; FIG15 is a schematic partial cross-sectional view taken along the DD direction.

[0221] 14 and 15 , in some embodiments, the protection plate 30 includes a base region 30 a and a thickened region 30 b , and the thickness of the thickened region 30 b is greater than that of the base region 30 a .

[0222] The protective plate 30 can increase the local strength of the protective plate 30 by having a thickened area 30b; the protective plate 30 can select the position of the thickened area 30b according to the strength requirements. Compared with the solution of thickening the entire protective plate 30, the embodiment of the present application can reduce the weight of the protective plate 30 while meeting the strength requirements.

[0223] There may be one or more thickened areas 30b.

[0224] In some embodiments, the seat beam may be mounted in the thickened region 30b.

[0225] In some embodiments, the second connecting member 60 connects the thickened area 30b to the top wall 10b.

[0226] In some embodiments, the protective plate 30 is an integrally formed structure.

[0227] In some embodiments, the base region 30a and the thickened region 30b are independently formed plates, which are connected into one piece by welding.

[0228] In some embodiments, the protective plate 30 includes a base plate and a thickened plate stacked along a vertical direction Z. The area of ​​the thickened plate is smaller than that of the base plate. The thickened region 30b includes the thickened plate and the portion of the base plate and the thickened plate that overlap. The base region 30a includes the portion of the base plate that does not overlap with the thickened plate.

[0229] FIG16 is a schematic cross-sectional view of a protective plate provided in some other embodiments of the present application.

[0230] 16 , in some embodiments, the protective plate 30 comprises a metal-plastic composite material, which can have both the mechanical properties of metal and the thermal insulation properties of plastic.

[0231] In some embodiments, the protective plate 30 includes a metal substrate 30 c and a plastic layer 30 d coated on the surface of the metal substrate 30 c. The plastic layer 30 d has excellent wear resistance, which can reduce the wear of the protective plate 30 .

[0232] In some embodiments, the metal substrate 30c may be a steel plate.

[0233] In some embodiments, the plastic layer 30d is made of insulating plastic.

[0234] Figure 17 is a top view schematic diagram of batteries provided in other embodiments of the present application; Figure 18 is a cross-sectional schematic diagram taken along the EE direction of Figure 17; Figure 19 is an enlarged schematic diagram of the circle frame in Figure 18; and Figure 20 is an exploded schematic diagram of some components of the battery shown in Figure 17.

[0235] 17 to 20 , in some embodiments, the reinforcement structure 40 includes a mounting plate 42 and a first connector 43 fixed to the mounting plate 42 . The mounting plate 42 is fixed to the protective plate 30 . The first connector 43 is used to connect to an external component.

[0236] There may be one or more first connecting members 43 .

[0237] The first connector 43 can provide mounting points for some components of the electrical device, thereby reducing parts, improving integration, and simplifying the assembly process.

[0238] For example, when the battery 2 is applied to a vehicle, the first connector 43 may be used to connect to a seat beam 6 of the vehicle.

[0239] In some embodiments, there are a plurality of first connecting members 43. Optionally, the plurality of first connecting members 43 are arranged along the first direction X.

[0240] In some embodiments, the first connecting member 43 comprises a rivet bolt.

[0241] In some embodiments, the mounting plate 42 includes a third protrusion 421 that protrudes toward a side away from the protective plate 30. A third recess 422 is formed inside the third protrusion 421. A portion of the first connector 43 is received in the third recess 422, and the first connector 43 passes through the third protrusion 421 and is fixed to the third protrusion 421.

[0242] In some embodiments, the seat beam 6 abuts against and is fixed to the third protrusion 421 .

[0243] FIG21 is a schematic diagram of an electrical device provided in some other embodiments of the present application.

[0244] 21 , the present application further provides an electrical device, comprising a battery 2 according to any of the above embodiments, the battery 2 being used to provide electrical energy to the electrical device. The electrical device may be any of the aforementioned devices or systems using the battery 2.

[0245] In some embodiments, the electrical device is a vehicle, and the top wall 10b can be embedded in the interior of the vehicle, which can reduce the risk of the top wall 10b being subjected to external impact.

[0246] In some embodiments, the protective plate 30 forms at least a portion of the vehicle's floor. Using the protective plate 30 of the battery 2 as the floor can save vehicle components, improve vehicle integration, and simplify vehicle assembly. The protective plate 30 can withstand passenger footsteps, minimize deformation of the flow channel 111, and improve heat exchange uniformity.

[0247] In some embodiments, the vehicle includes a seat 5, which is connected to a protective plate 30. The protective plate 30 can carry the seat 5, thereby improving the space utilization of the entire vehicle.

[0248] In some embodiments, the seat 5 is mounted to the beam structure of the reinforcement structure 40 .

[0249] In some other embodiments, the vehicle further includes a seat beam 6 , which is fixed to the first connecting member 43 . The seat 5 is mounted on the seat beam 6 . The protective plate 30 is mounted on the seat beam 6 via the first connecting member 43 .

[0250] 2 to 6 , an embodiment of the present application provides a battery 2 , which includes a housing 10 , a battery cell 20 , a protective plate 30 , a reinforcement structure 40 , and a distribution box 50 .

[0251] The housing 10 comprises a frame 12, a heat exchange plate 11, and a bottom plate 13. The heat exchange plate 11 and bottom plate 13 are located on the upper and lower sides of the frame 12, respectively, along the vertical direction Z. The frame 12, the heat exchange plate 11, and the bottom plate 13 define a receiving chamber 10a. The battery cells 20 are housed in the receiving chamber 10a and bonded to the heat exchange plate 11. The heat exchange plate 11 has internal flow channels 111 for the heat exchange medium to flow through and for heat exchange between the battery cells 20. Electrode terminals 23 and a pressure relief mechanism 24 are located on the side of the battery cells 20 facing away from the heat exchange plate 11.

[0252] The protective plate 30 is disposed on the side of the heat exchange plate 11 away from the battery cells 20 and is connected to the heat exchange plate 11. The reinforcement structure 40 is disposed on the side of the protective plate 30 away from the heat exchange plate 11 and is fixed to the protective plate 30. The reinforcement structure 40 is used to mount the seat 5 of the vehicle.

[0253] The distribution box 50 includes a housing 51 and an electrical component 52 housed therein. The housing 51 is disposed on a side of the protective plate 30 facing away from the heat exchange plate 11 and is fixed to the protective plate 30 . The electrical component 52 is electrically connected to the battery cell 20 .

[0254] The heat exchange plate 11 includes a first plate 112 and a second plate 113 stacked along a vertical direction Z. The first plate 112 is located below the second plate 113 along the vertical direction Z. The first plate 112 is connected to the battery cells 20, and the second plate 113 is connected to the protective plate 30. The flow channel 111 is formed between the first plate 112 and the second plate 113.

[0255] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0256] 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 of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, comprising: A box body having a receiving cavity. The box body includes a top wall located on the upper side of the receiving cavity in the vertical direction, and a flow channel for a heat exchange medium to flow is provided inside the top wall. A battery cell accommodated in the receiving cavity; and A protective plate disposed on the side of the top wall away from the battery cell and connected to the top wall.

2. The battery according to claim 1, further comprising a strengthening structure disposed on the side of the protective plate facing away from the top wall and fixed to the protective plate.

3. The battery according to claim 2, wherein The strengthening structure is used for connecting to an external component.

4. The battery according to claim 2 or 3, wherein, The strengthening structure includes a beam structure.

5. The battery according to claim 2 or 3, wherein The strengthening structure includes a mounting plate and a first connecting member fixed to the mounting plate. The mounting plate is fixed to the protective plate, and the first connecting member is used for connecting to an external component.

6. The battery according to any one of claims 1-5, wherein, The box body includes a frame body, a heat exchange plate and a bottom plate. The heat exchange plate and the bottom plate are respectively located on the upper side and the lower side of the frame body in the vertical direction, and the frame body, the heat exchange plate and the bottom plate define the receiving cavity. The top wall includes the heat exchange plate, and the heat exchange plate is used for heat exchange with the battery cell.

7. The battery according to claim 6, further comprising a second connecting member connecting the protective plate, the heat exchange plate and the frame body.

8. The battery according to claim 6 or 7, wherein The heat exchange plate includes a first plate and a second plate stacked in the vertical direction. The first plate is located on the lower side of the second plate in the vertical direction. The first plate is a flat plate and is connected to the battery cell, and the second plate is connected to the protective plate. A first recess is provided on the side of the second plate facing the first plate. The first plate covers the first recess and forms the flow channel. A first protrusion is formed at a position corresponding to the first recess on the second plate, and the first protrusion protrudes away from the first plate.

9. The battery according to any one of claims 1-8, wherein, The top wall includes a flow channel region and a non-flow channel region, and the flow channel is provided in the flow channel region. In the vertical direction, the projection of the flow channel region is located within the projection of the protective plate.

10. The battery according to any one of claims 1-9, wherein, The top wall includes a flow channel region and a non-flow channel region, and the flow channel is provided in the flow channel region. In the vertical direction, the flow channel region is spaced apart from the protective plate.

11. The battery according to any one of claims 1-10, wherein The top wall includes a flow channel region and a non-flow channel region, and the flow channel is provided in the flow channel region. The protective plate is fixed to the non-flow channel region. A second recess is provided on the side of the protective plate facing the top wall, and the projection of the flow channel region in the vertical direction is located within the projection of the second recess.

12. The battery according to claim 11, wherein, The non-flow channel region has a first surface facing the protective plate, and at least a part of the flow channel region protrudes from the first surface. The part of the flow channel region protruding from the first surface is received in the second recess.

13. The battery according to any one of claims 1-12, wherein, The protective plate is bonded to the top wall.

14. The battery according to any one of claims 1-13, wherein, In the vertical direction, the projection of the top wall is located within the projection of the protective plate.

15. The battery according to any one of claims 1-14, wherein, The protective plate includes a base region and a thickened region, and the thickness of the thickened region is greater than the thickness of the base region.

16. The battery according to any one of claims 1-15, wherein, The protective plate includes a metal-plastic composite material.

17. The battery according to any one of claims 1-16 further includes a distribution box, the distribution box includes an electrical component accommodated in a housing, the housing is disposed on a side of the protection plate away from the top wall and fixed to the protection plate, and the electrical component is electrically connected to the battery cell.

18. The battery according to any one of claims 1-17, wherein, The battery cell is fixed to the top wall.

19. The battery according to claim 18, wherein, The battery cell is bonded to the top wall.

20. The battery according to claim 18 or 19, wherein, An electrode terminal and / or a pressure relief mechanism is provided on a side of the battery cell away from the top wall.

21. An electrical device includes the battery according to any one of claims 1-20, and the battery is used to provide electrical energy.

22. The electrical device according to claim 21, wherein, The electrical device is a vehicle.

23. The electrical device according to claim 22, wherein, The protection plate is at least part of a floor of the vehicle.

24. The electrical device according to claim 22 or 23, wherein, The vehicle includes a seat, and the seat is connected to the protection plate.

Images