Batteries and electrical devices

Abstract

The present application provides a battery and an electric device. The battery includes a case, a battery cell, and a protective plate. The case has a receiving cavity. The case includes a top wall located vertically above the receiving cavity and having a flow path for a heat exchange medium therein. The battery cell is received in the receiving cavity. The protective plate is attached to the top wall on the side away from the battery cell and connected to the top wall. The protective plate can protect the top wall from above, reducing impact forces received by the top wall from above, minimizing deformation of the top wall, improving heat exchange uniformity, reducing the risk of heat exchange medium leakage, and improving battery reliability.

Description

[Technical Field]

[0001] This application relates to the field of battery technology, and more particularly to batteries and electrical devices. [Background technology]

[0002] The batteries are widely used in electronic devices such as mobile phones, laptops, electric scooters, electric cars, electric planes, electric boats, electric toy cars, electric toy boats, electric toy planes and power tools.

[0003] In the development of battery technology, how to improve the reliability of batteries is one of the research directions in battery technology. Summary of the Invention [Means for solving the problem]

[0004] The present application provides a battery and an electric device that can improve the reliability of the battery.

[0005] In a first aspect, an embodiment of the present application provides a battery including a case, a battery cell, and a protective plate. The case has a housing cavity. The case includes a top wall located vertically above the housing cavity and having a flow path for a heat exchange medium therein. The battery cell is housed in the housing cavity. The protective plate is located on the side of the top wall away from the battery cell and connected to the top wall.

[0006] The flow channel is formed in the top wall of the case, and when the bottom of the case is subjected to an external impact, the impact on the flow channel is relatively small. The protective plate can protect the top wall from above, reducing the impact force that the top wall receives from above, 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.

[0007] In some embodiments, the battery further includes a reinforcing structure disposed on the side of the protective plate facing away from the top wall and fixed to the protective plate, which can improve the overall strength of the battery, reduce deformation of the protective plate when the protective plate is subjected to external impact, reduce the risk of the protective plate pressing against the top wall, and improve the reliability of the battery.

[0008] In some embodiments, the reinforcing structure is used to connect to an external component. The reinforcing structure of the battery can provide attachment points to several components of the electrical device, thereby reducing parts, improving integration, and simplifying the assembly process.

[0009] In some embodiments, the reinforcing structure includes a beam structure, which has high strength and can reduce deformation of the protection plate when the protection plate is subjected to external impact.

[0010] In some embodiments, the reinforcement structure includes a mounting plate and a first connecting member fixed to the mounting plate, the mounting plate being fixed to the protective plate, and the first connecting member being used to connect to an external member. The first connecting member provides attachment points for several components of the electrical device, thereby reducing parts, improving integration, and simplifying the assembly process.

[0011] In some embodiments, the case includes a frame, a heat exchange plate, and a base plate, the heat exchange plate and the base plate being located on the upper and lower sides of the frame along a vertical direction, respectively, and the frame, the heat exchange plate, and the base plate define an accommodating cavity. The top wall includes the heat exchange plate for heat exchange with the battery cells.

[0012] By integrating the heat exchange plates on the case, the number of battery parts can be reduced, the integration degree of the battery can be improved, and the energy density of the battery can be improved.

[0013] In some embodiments, the battery further includes a second connecting member connected to the protection plate, the heat exchange plate, and the frame, the second connecting member simultaneously fixing the protection plate and the heat exchange plate to the frame, thereby improving the stability of the protection plate and the heat exchange plate.

[0014] In some embodiments, the heat exchange plate includes a first plate and a second plate stacked vertically, the first plate being located below the second plate in the vertical direction, the first plate being a flat plate and connected to the battery cell, and the second plate being connected to the protection plate, the second plate having a first recess on a side facing the first plate, the first plate covering the first recess to form a flow path, and the second plate having a first protrusion formed at a position corresponding to the first recess, the first protrusion protruding toward the side away from the first plate.

[0015] The first plate and the second plate can be molded independently, allowing for flexible configuration of the flow path shape, reducing the difficulty of molding the heat exchange plate and improving the uniformity of heat exchange. The surface of the first plate is flat, making it convenient for arranging battery cells. The provision of the first protrusion increases the depth of the first recess, increasing the current flow area of ​​the flow path and reducing the impact of the first recess on the strength of the second plate, improving the reliability of the second plate.

[0016] In some embodiments, the top wall includes a channel region and a non-channel region, and the channels are located in the channel region. Vertically, the projection of the channel region lies within the projection of the apron.

[0017] The protective plate can protect the flow path area from above, reducing the impact force that the flow path area receives from above, reducing deformation of the flow path area, improving the uniformity of heat exchange, reducing the risk of the flow path area bursting, and improving the reliability of the battery.

[0018] In some embodiments, the top wall includes a channel region and a non-channel region, and the channel is located in the channel region. The channel region and the guard plate are vertically spaced apart.

[0019] When the upper side of the protective plate is subjected to pressure, the protective plate may deform downward. Installing the flow path area and the protective plate with a gap between them provides space for the protective plate to deform, thereby reducing the risk of the protective plate directly pressing against the flow path area.

[0020] In some embodiments, the top wall includes a channel region and a non-channel region, the channel is located in the channel region, a protective plate is fixed to the non-channel region, a second recess is provided on the side of the protective plate facing the top wall, and a vertical projection of the channel region is located within the projection of the second recess.

[0021] By providing the second recess, the flow path region can be avoided, the distance between the bottom surface of the second recess and the flow path region can be increased, and the risk of the protective plate directly pressing against the flow path region can be reduced.

[0022] In some embodiments, the non-channel region has a first surface facing the protective plate, at least a portion of the channel region protrudes from the first surface, and the portion of the channel region protruding from the first surface is accommodated in a second recess. The second recess avoids the channel region and provides space for the channel region, thereby improving space utilization.

[0023] In some embodiments, the protection plate is glued to the top wall, which can improve the connection strength between the top wall and the protection plate and improve the stability of the protection plate.

[0024] In some embodiments, the projection of the top wall is located vertically within the projection of the protection plate, which completely covers the top wall from above, thereby protecting the top wall and reducing impacts on the top wall.

[0025] In some embodiments, the protective plate includes a base region and a thickened region having a thickness greater than that of the base region. The thickened region can be installed in the protective plate to increase the local strength of the protective plate, and the position of the thickened region can be selected according to the strength requirements. Compared with a solution in which the entire protective plate is thickened, the embodiments of the present application can reduce the weight of the protective plate while still meeting the strength requirements.

[0026] In some embodiments, the protective plate comprises a metal-plastic composite material, which combines the mechanical properties of metal with the thermal properties of plastic.

[0027] In some embodiments, the battery further includes a power distribution board including a casing and an electrical device housed in the casing, the casing being located on a side of the protective plate away from the top wall and secured to the protective plate, and the electrical device being electrically connected to the battery cells.

[0028] The power distribution board is installed on the side away from the top wall of the protective plate, and the protective wall and top wall protect the power distribution board in the event of thermal runaway in the battery cells, reducing the risk of high-temperature materials being released from the battery cells damaging electrical devices. The top wall also exchanges heat with the power distribution board through the protective plate, thereby regulating the temperature of the power distribution board. Installing the power distribution board outside the case further improves the utilization rate of the battery's internal space.

[0029] In some embodiments, the battery cells are fixed to the top wall. The top wall can simultaneously serve to mount the battery cells and exchange heat with the battery cells. By fixing the battery cells to the top wall, the relative movement between the battery cells and the top wall can be reduced when the battery is subjected to external impact, and the stability of heat exchange between the top wall and the battery cells can be improved.

[0030] In some embodiments, the battery cells are glued to the top wall, a process that is simple and highly stable.

[0031] In some embodiments, the battery cell is provided with electrode terminals and / or pressure relief mechanisms on the side away from the top wall.

[0032] The electrode terminals are usually installed so as to protrude, and by installing the electrode terminals on the side away from the top wall of the battery cell, the risk of the bus member connected to the electrode terminal interfering with the top wall can be reduced, the heat exchange area between the battery cell and the top wall can be increased, and heat exchange efficiency can be improved.

[0033] In the event of thermal runaway in the battery cell, the high-temperature, high-pressure material released through the pressure release mechanism will not directly impinge on the top wall, thereby reducing the risk of the top wall melting and reducing leakage of the heat exchange medium.

[0034] In a second aspect, embodiments of the present application provide an electrical device comprising a battery according to any embodiment of the first aspect, the battery being adapted to provide electrical energy.

[0035] In some embodiments, the electrical device is a vehicle. The top wall can be recessed inside the vehicle, thereby reducing the risk of the top wall being subjected to external impacts.

[0036] In some embodiments, the protective plate is at least a part of the vehicle floor. Using the battery protective plate as the floor can save vehicle parts, improve vehicle integration, and simplify the vehicle assembly process. The protective plate can withstand passengers stepping on it, reduce deformation of the flow path, and improve uniformity of heat exchange.

[0037] In some embodiments, the vehicle includes a seat connected to a protective plate that can support the seat and improve space utilization of the entire vehicle. [Brief explanation of the drawings]

[0038] In order to more clearly explain the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings used in the embodiments of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can further obtain other drawings according to the drawings without any creative work. [Figure 1] 1 is a structural schematic diagram of a vehicle provided in accordance with some embodiments of the present application. [Figure 2] 1 is an exploded schematic view of a battery provided in accordance with some embodiments of the present application. [Figure 3] FIG. 3 is an exploded schematic view of the partial structure shown in FIG. 2. [Figure 4] 1 is an exploded schematic view of a battery cell of a battery provided in accordance with some embodiments of the present application. [Figure 5] FIG. 4 is an enlarged schematic view of the circled area in FIG. 3. [Figure 6] FIG. 6 is a schematic local cross-sectional view taken along the direction AA in FIG. 5. [Figure 7] 1 is a top view schematic diagram of a battery provided in accordance with some embodiments of the present application. [Figure 8] FIG. 8 is a schematic cross-sectional view taken along the direction BB in FIG. 7. [Figure 9] FIG. 9 is an enlarged schematic view of the circled area in FIG. 8. [Figure 10] FIG. 10 is an enlarged schematic view of a block portion of FIG. 9. [Figure 11] 1 is a top view schematic diagram of a protective plate of a battery provided in accordance with some embodiments of the present application. [Figure 12] FIG. 12 is a schematic cross-sectional view taken along the CC direction in FIG. [Figure 13] FIG. 13 is an enlarged schematic view of the circled area in FIG. 12. [Figure 14] 10A and 10B are schematic top views of protective plates provided in accordance with some other embodiments of the present application. [Figure 15] FIG. 2 is a schematic local cross-sectional view along the DD direction. [Figure 16] 10A-10C are cross-sectional schematic diagrams of protective plates provided in accordance with some other embodiments of the present application. [Figure 17]FIG. 2 is a schematic top view of a battery provided in accordance with some other embodiments of the present application. [Figure 18] FIG. 18 is a schematic cross-sectional view taken along the EE direction of FIG. 17. [Figure 19] FIG. 19 is an enlarged schematic view of the circled area in FIG. 18. [Figure 20] FIG. 18 is an exploded schematic view of some components of the battery shown in FIG. 17. [Figure 21] 1 is a schematic diagram of an electrical device provided in accordance with some other embodiments of the present application.

[0039] The symbols are explained as follows: 1 Vehicle, 2 Battery, 3 Controller, 4 Motor, 5 Seat, 6 Seat beam, 10 case, 10a containing cavity, 10b top wall, 11 heat exchange plate, 111 flow path, 112 first plate, 113 second plate, 113a first recess, 113b first protrusion, 114 first surface, 11a flow path region, 11b non-flow path region, 12 frame, 121 first beam, 122 second beam, 13 base plate, 20 battery cell, 21 outer casing, 211 battery casing, 2111 casing bottom wall, 212 end cap, 22 electrode assembly, 23 electrode terminal, 24 pressure release mechanism, 30 protective plate, 30a base region, 30b thick region, 30c metal substrate, 30d plastic layer, 31 second recess, 32 second protrusion, 33 edge, 40 Reinforcement structure, 41 Beam structure, 42 Mounting plate, 421 Third protrusion, 422 Third recess, 43 First connecting member, 50 distribution board, 51 casing, 511 casing opening, 52 electrical device, 53 cover plate, 60 second connecting member, X primary direction, Y secondary direction, Z vertical direction. DETAILED DESCRIPTION OF THE INVENTION

[0040] In order to clarify the objectives, technical solutions and advantages of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application, but it is obvious that the described embodiments are only some of the embodiments of the present application, and do not represent all of the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without performing creative work fall within the scope of protection of the present application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of this application, and the terms used in this specification are only for the purpose of describing specific embodiments and are not intended to limit this application, and the terms "comprise" and "have" and any variations thereof in the specification, claims, and drawings of this application are intended to cover a non-exclusive inclusion. Terms such as "first," "second," etc. in the specification, claims, and drawings of this application are used to distinguish between different objects and are not used to describe a particular order or priority.

[0042] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of the phrase in various locations in the specification do not necessarily refer to the same embodiment, nor are they mutually exclusive independent or alternative embodiments of other embodiments.

[0043] In the description of this application, unless otherwise clearly specified or limited, the terms "attached," "coupled," and "connected" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art may understand the specific meanings of the above terms in this application depending on the specific circumstances.

[0044] The term "and / or" in this application is simply a relational relationship that describes related objects, and indicates that three types of relationships can exist. For example, A and / or B can represent three situations: the presence of only A, the simultaneous presence of A and B, and the presence of only B. In addition, the symbol " / " in this application generally indicates that the related objects before and after it are in an "or" relationship.

[0045] In the embodiments of the present application, the same drawing symbols represent the same components, and for the sake of brevity, detailed descriptions of the same components will be omitted in different embodiments. It should be understood that the dimensions such as thickness, length, width, etc. of various components in the embodiments of the present application shown in the accompanying drawings, and the overall thickness, length, width, etc. of the integrated device, are merely exemplary and should not be construed as limitations of the present application.

[0046] In the embodiments of the present application, "parallel" not only includes the case of absolute parallelism but also includes the case of approximately parallelism as commonly recognized in engineering, and at the same time, "perpendicular" not only includes the case of absolute perpendicularity but also includes the case of approximately perpendicularity as commonly recognized in engineering. For example, when the angle between two directions is 85° to 90°, the two directions are considered to be perpendicular, and when the angle between the two directions is 0° to 5°, the two directions are considered to be parallel.

[0047] The term "plurality" as used herein refers to two or more (including two).

[0048] A battery as referred to in the examples of this application refers to a single physical module containing one or more battery cells to provide higher voltage and capacity.

[0049] The battery cell may be a secondary battery cell, which refers to a battery cell that can be discharged and then continued to be used by activating the active material through charging.

[0050] The battery cells may 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 metal hydride battery cells, nickel cadmium battery cells, lead acid battery cells, etc.

[0051] In some embodiments, the battery further includes a case, and the battery cells are housed in the case. The case can protect the battery cells from the outside and reduce the risk of the battery cells expiring.

[0052] Battery cells generate heat during the charging and discharging process. When multiple battery cells are used in a group, this heat may accumulate. If this heat is not effectively removed, it will cause the battery cells to overheat and accelerate their aging. In addition, excessively high temperatures can easily cause thermal runaway, posing a safety risk. If battery cells are in a low-temperature environment, their service life will be shortened and their discharge capacity will be weakened.

[0053] In the related art, an independent heat exchange plate is usually installed inside a battery, and the heat exchange plate can exchange heat with the battery cells, thereby controlling the operating temperature of the battery cells within an appropriate range. Specifically, a flow path is usually provided inside the heat exchange plate, and when an external heat exchange medium flows through the flow path of the heat exchange plate, the heat exchange medium exchanges heat with the battery cells through the heat exchange plate, thereby regulating the temperature of the battery cells.

[0054] However, separate heat exchange plates take up space, thereby reducing the energy density of the battery.

[0055] In some embodiments, the battery can integrate the case and the heat exchange plate, and the heat exchange plate can be used as a case wall of the case, thereby saving materials, simplifying the battery structure, and improving the energy density.

[0056] During battery use, the case can withstand external impacts and protect the battery cells. However, if the heat exchange plate is installed below the battery cells, there is a high risk that the heat exchange plate will be subjected to external impacts, which will affect the reliability of the heat exchange plate. In view of this, in some embodiments, the heat exchange plate is typically integrated above the battery cells to reduce the impact that the heat exchange plate will receive from below the battery cells.

[0057] Since different electrical devices are used in different scenarios, batteries are required to be adaptable to various harsh usage scenarios when applied to different electrical devices. For example, when a battery is applied to an electric vehicle, if a heat exchange plate is installed on the upper side of the battery cell, problems such as uneven flow rate and leakage are likely to occur when the heat exchange plate is subjected to the driver's footsteps, which affects the reliability of the battery cell.

[0058] In view of this, the embodiments of the present application provide a technical solution that reduces the impact force that the flow path of the case receives from above by installing a protective plate on the top of the case, thereby reducing the risk of case damage and leakage and improving the reliability of the battery.

[0059] The battery described in the embodiments of the present application is applied to an electrical device that uses a battery.

[0060] The electric devices may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, power tools, etc. The vehicles may be fuel-powered vehicles, natural gas vehicles, or new energy vehicles, and the new energy vehicles may be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc. The spacecraft may be airplanes, rockets, space shuttles, spaceships, etc. The electric toys include stationary or mobile electric toys such as game consoles, electric car toys, electric boat toys, and electric plane toys, and the electric tools include metal cutting power tools such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, grinding power tools, assembly power tools, and railway power tools. The embodiments of the present application do not particularly limit the above electric devices.

[0061] For convenience of explanation, the following embodiment will be described by taking the case where the electrical device is a vehicle as an example.

[0062] FIG. 1 is a structural schematic diagram of a vehicle provided according to some embodiments of the present application.

[0063] 1, a battery 2 is installed inside the vehicle 1, and the battery 2 may be installed at the bottom, head, or tail of the vehicle 1. The battery 2 is used to power the vehicle 1, and for example, the battery 2 can function as an operating power source for the vehicle 1.

[0064] The vehicle 1 may further include a controller 3 and a motor 4, where the controller 3 controls the battery 2 to supply power to the motor 4, for example, to meet the operating power needs of the vehicle 1 for starting, navigation, and driving.

[0065] In some embodiments of the present application, the battery 2 is not only used as the operating power source for the vehicle 1, but can also provide driving power to the vehicle 1 by completely or partially replacing fuel or natural gas as the driving power source for the vehicle 1.

[0066] FIG. 2 is an exploded schematic view of a battery provided according to some embodiments of the present application, FIG. 3 is an exploded schematic view of the partial structure shown in FIG. 2, FIG. 4 is an exploded schematic view of a battery cell of a battery provided according to some embodiments of the present application, FIG. 5 is an enlarged schematic view of the circled area in FIG. 3, and FIG. 6 is a local cross-sectional schematic view taken along the AA direction in FIG. 5.

[0067] 2 to 6, an embodiment of the present application provides a battery 2 including a case 10 having a receiving cavity 10a and a battery cell 20 received in the receiving cavity 10a.

[0068] The battery 2 may have one or more battery cells 20. When there are multiple battery cells 20, the multiple battery cells 20 may be connected in series, in parallel, or in series-parallel, and a series-parallel connection means that the multiple battery cells 20 are connected in both series and parallel.

[0069] The plurality of battery cells 20 may be connected in direct series, parallel, or series-parallel, and the entire configuration of the plurality of battery cells 20 may be accommodated in the receiving cavity 10a. Of course, the plurality of battery cells 20 may first be connected in series, parallel, or series-parallel to form a battery module, and the plurality of battery modules may then be connected in series, parallel, or series-parallel to form the entire configuration, which is then accommodated in the receiving cavity 10a.

[0070] As an example, the battery cells 20 may be prismatic battery cells, soft-pack battery cells, or battery cells of other shapes, where prismatic battery cells include polygonal prismatic battery cells such as rectangular battery cells, blade-shaped battery cells, and hexagonal battery cells.

[0071] The case 10 may have various shapes such as a cylinder or a rectangular parallelepiped.

[0072] The material of the case 10 may be steel, aluminum, aluminum alloy, or other materials.

[0073] In some embodiments, the battery cell 20 includes an outer casing 21 and an electrode assembly 22 , the electrode assembly 22 being housed within the outer casing 21 .

[0074] The electrode assembly 22 is a component that causes an electrochemical reaction in the battery cell 20. The exterior casing 21 may contain one or more electrode assemblies 22.

[0075] For example, the electrode assembly 22 includes positive and negative electrode pieces. The portions of the positive and negative electrode pieces that have active material form the main body of the electrode assembly 22, and the portions of the positive and negative electrode pieces that do not have active material form tabs, respectively. The tabs may include positive and negative electrode tabs. The positive and negative electrode tabs may both be located at one end of the main body, or may be located at both ends of the main body.

[0076] During the charging and discharging process of the battery cell 20, the positive and negative active materials react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop.

[0077] The outer casing 21 has a hollow structure, and an accommodation space is formed inside thereof to accommodate the electrode assembly 22 and the electrolyte. The shape of the outer casing 21 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 has a rectangular parallelepiped structure, a rectangular outer casing may be selected, and if the electrode assembly 22 has a cylindrical structure, a cylindrical outer casing may be selected.

[0078] For example, the outer casing 21 includes a battery casing 211 and an end cap 212, where the battery casing 211 has an opening and the end cap 212 is used to cover the opening. The end cap 212 is connected to the battery casing 211 by welding, adhesive, engagement, or other methods.

[0079] The battery casing 211 may be open at one end or at both ends. In some examples, the battery casing 211 may have a structure in which one side is open, and one end cap 212 is installed and covered by the battery casing 211. In other examples, the battery casing 211 may also have a structure in which both sides are open, and two end caps 212 are installed, and the two end caps 212 respectively cover the two openings of the battery casing 211.

[0080] In some embodiments, the battery cell 20 further includes an electrode terminal 23. The electrode terminal 23 may be used to electrically connect to the electrode assembly 22 so as to be used to output or input electrical energy to the battery cell 20.

[0081] In some embodiments, the electrode terminals 23 are attached to the cell casing 211 or the end caps 212 .

[0082] In some embodiments, there are two electrode terminals 23, which are electrically connected to the tabs of the positive and negative electrodes, respectively. The current generated by the electrode assembly 22 can be transmitted to the outside through the electrode terminals 23, and an external power source can also charge the electrode assembly 22 through the electrode terminals 23.

[0083] In some embodiments, the battery cell 20 further includes a pressure relief mechanism 24 .

[0084] If a phenomenon such as a short circuit or overcharging occurs, thermal runaway may occur inside the battery cell 20, causing the internal pressure of the exterior casing 21 to rise suddenly, and there is a risk that the battery cell 20 may explode.

[0085] The pressure release mechanism 24 connects the internal space of the outer casing 21 with the external space when the internal pressure or temperature of the outer casing 21 reaches a threshold, thereby releasing the internal pressure of the battery cell 20 and reducing the risk of the battery cell 20 exploding.

[0086] The pressure release mechanism 24 refers to an element or member that is activated to release the internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold. The design of the threshold varies according to design needs. The threshold may depend on one or more of the materials of the positive electrode piece, the negative electrode piece, the electrolyte, and the separator film in the battery cell 20. The pressure release mechanism 24 may take the form of an explosion-proof valve, a gas valve, a pressure release valve, a safety valve, or the like. Specifically, the pressure release mechanism 24 may take the form of a pressure-sensitive element or pressure-sensitive structure or a temperature-sensitive element or temperature-sensitive structure.

[0087] In some embodiments, pressure relief mechanism 24 may be located in cell casing 211 or in end cap 212 .

[0088] In some embodiments, the case 10 includes a top wall 10b located above the accommodating cavity 10a in the vertical direction Z and having a flow path 111 formed therein for a heat exchange medium to flow through. Illustratively, the top wall 10b is used for heat exchange with at least the battery cells 20.

[0089] For example, when the battery 2 is installed in an electrical device, the top wall 10b is located on the upper side of the receiving cavity 10a along the vertical direction Z. During the manufacturing, transportation, etc. of the battery 2, the top wall 10b is not required to be located on the upper side of the receiving cavity 10a along the vertical direction Z.

[0090] By way of example, the heat exchange medium may be a liquid or a gas, for example water.

[0091] The top wall 10b may be a single molded member, or may be formed by connecting a plurality of independently molded members.

[0092] The battery cells 20 may be fixed to the top wall 10b of the case 10, or may be fixed to the bottom wall of the case 10, or may be fixed to another position on the case 10.

[0093] For 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 case 10 .

[0094] As an example, the pressure release mechanism 24 of the battery cell 20 may be directed toward the top wall 10 b , the bottom wall, or even the side wall of the case 10 .

[0095] The flow path 111 is formed in the top wall 10b of the case 10, and when the underside of the case 10 is subjected to an external impact, the impact force received by the flow path 111 is relatively small, thereby reducing deformation of the flow path 111, improving the uniformity of heat exchange, reducing the risk of leakage of the heat exchange medium, and improving the reliability of the battery 2.

[0096] In some embodiments, the battery 2 includes a protective plate 30 located on the side of the top wall 10b away from the battery cells 20 and connected to the top wall 10b.

[0097] The apron 30 may be connected to the top wall 10b by adhesive, fasteners, welding, engagement, or other methods.

[0098] In the vertical direction Z, the protection plate 30 may cover a part of the top wall 10b from above, or may cover the top wall 10b completely.

[0099] The protection plate 30 may be a plate of uniform thickness or may be a plate of unequal thickness.

[0100] The material of the protective plate 30 may be metal, plastic, metal-plastic composite material or other materials. Optionally, the metal may be aluminum, aluminum alloy, stainless steel, nickel-plated steel or other.

[0101] The protection plate 30 may be an integrally molded plate, or may be formed by splicing together a plurality of plates.

[0102] In the embodiment of the present application, the protective plate 30 protects the top wall 10b from above, thereby reducing the impact force that the top wall 10b receives from above, reducing deformation of the top wall 10b, improving the uniformity of heat exchange, reducing the risk of leakage of the heat exchange medium, and improving the reliability of the battery 2.

[0103] In some embodiments, the battery 2 further includes a reinforcing structure 40 disposed on the side of the protective plate 30 away from the top wall 10b and fixed to the protective plate 30.

[0104] The reinforcing structure 40 and the protective plate 30 may be independently molded components that can be fixedly connected by welding, adhesive, fasteners, or other methods, or the reinforcing structure 40 and the protective plate 30 may also be integrally molded.

[0105] The reinforcing structure 40 may be a plate structure, a beam structure, a reinforcing rib structure, a convex hull structure, or any other structure, as long as it can reinforce the local strength of the protection plate 30 .

[0106] The reinforcing structure 40 may be one or more.

[0107] When the battery 2 is installed in an electrical device, the reinforcing structure 40 may or may not be connected to other components of the electrical device.

[0108] The reinforcing structure 40 can improve the strength of the entire 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 pressing against the top wall 10b, and improve the reliability of the battery 2.

[0109] In some embodiments, the reinforcing structure 40 is adapted to be connected to an external member.

[0110] For example, if the battery 2 is applied to a vehicle, the reinforcing structure 40 may be used to connect to a seat 5 of the vehicle.

[0111] The reinforcing structure 40 of the battery 2 provides attachment points for several components of an electrical device, thereby reducing parts, improving integration, and simplifying the assembly process.

[0112] In some embodiments, the reinforcing structure 40 includes a beam structure 41. The beam structure 41 has high strength, so that deformation of the protection plate 30 can be reduced when the protection plate 30 is subjected to an external impact.

[0113] Illustratively, the beam structure 41 may function as a seat beam for mounting a seat 5 in a vehicle.

[0114] In some embodiments, the beam structure 41 is connected to the apron 30 by gluing or welding.

[0115] In some embodiments, the beam structure 41 extends along a first direction X. Illustratively, the first direction X is perpendicular to the vertical direction Z.

[0116] In some embodiments, the beam structure 41 is formed by bending a metal plate.

[0117] In some embodiments, the reinforcing structure 40 comprises a plurality of beam structures 41 spaced apart along the second direction Y. Optionally, the first direction X, the second direction Y and the vertical direction Z are two-way perpendicular.

[0118] In some embodiments, the thickness of the protection plate 30 may be 0.1 mm to 50 mm, and optionally, the thickness of the protection plate 30 is 0.4 mm to 5 mm.

[0119] As an example, the thickness of the protection 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.

[0120] In the present embodiment, the thickness of the protective plate 30 is limited to 0.1 mm or more, thereby improving the structural strength of the protective plate 30 and reducing deformation of the protective plate 30 when stepped on. In the present embodiment, the thickness of the protective plate 30 is limited to 50 mm or less, thereby reducing the weight and volume of the protective plate 30 and reducing loss of energy density of the battery 2.

[0121] In some embodiments, the protective plate 30 is bonded to the top wall 10b. By bonding the protective plate 30 to the top wall 10b, the connection strength between the top wall 10b and the protective plate 30 can be improved, and the stability of the protective plate 30 can be enhanced.

[0122] In some embodiments, the apron 30 is adhered to the top wall 10b with a structural adhesive.

[0123] In some embodiments, the apron 30 and the top wall 10b are also connected by other members, such as fasteners.

[0124] In some embodiments, the battery 2 further includes a distribution board 50 including a casing 51 and an electrical device 52 housed in the casing 51, the casing 51 being installed on the side of the protective plate 30 away from the top wall 10b and fixed to the protective plate 30, and the electrical device 52 being electrically connected to the battery cells 20.

[0125] The power distribution board 50 controls the battery 2. For example, the power distribution board 50 plays a role in protecting and distributing power transmission to the battery 2 during the charging and discharging process of the battery 2.

[0126] The switchboard 50 is installed on the side away from the top wall 10b of the protective plate 30, and the protective plate 30 and the top wall 10b protect the switchboard 50 in the event of thermal runaway in the battery cells 20, reducing the risk of high-temperature materials being released from the battery cells 20 damaging the electrical devices 52. The top wall 10b also exchanges heat with the switchboard 50 via the protective plate 30, thereby regulating the temperature of the switchboard 50. Installing the switchboard 50 outside the case 10 further improves the utilization rate of the internal space of the battery 2.

[0127] Generally, the voltage of the battery 2 is relatively high, and if electrical appliances of the electrical device (e.g., a motor controller, an air conditioning system, and a charging system) are directly connected to the battery 2, it will cause a disruption in the wiring harness of the battery 2. Therefore, the battery 2 requires an additional distribution board 50 to distribute high voltage to the battery 2. The distribution board 50 adopts a centralized power distribution method, has a compact structural design, a convenient wiring layout, and is easy and quick to inspect. According to the system architecture needs of different customers, the distribution board 50 may also need to integrate intelligent control management units of some battery management systems, thereby further simplifying the complexity of power distribution for the entire electrical device.

[0128] In some embodiments, electrical device 52 includes one or more of a fuse, a relay, a resistor, a current sensor, and a battery management assembly to facilitate control of battery 2 .

[0129] A fuse is an electrical device that melts a molten metal with heat generated by itself when the current exceeds a predetermined value, thereby interrupting a circuit. A relay is an electrical controller that generates a predetermined step change in a controlled variable in an electrical output circuit when the change in the input variable (excitation variable) reaches a predetermined requirement. A current sensor is a testing device that can sense information about a measured current and convert the sensed information into an electrical signal or other required format that meets certain standard needs according to a certain rule, thereby meeting requirements such as information transmission, processing, storage, display, recording, and control. A battery management assembly is used to intelligently manage and maintain each battery cell 20, reduce the risk of overcharging and over-discharging the battery 2, extend the service life of the battery 2, and monitor the status of the battery 2.

[0130] Illustratively, the battery management assembly includes a circuit board.

[0131] In some embodiments, the power distribution board 50 is located directly below or behind the rear seats of the vehicle. By locating the power distribution board 50 below or behind the rear seats of the vehicle, significant space utilization can be achieved within the overall vehicle.

[0132] In some embodiments, the casing 51 of the switchboard 50 is secured to the protective plate 30 by welding.

[0133] In some embodiments, the casing 51 has a casing opening 511 at one end away from the protective plate 30, and the distribution board 50 further includes a cover plate 53 connected to the casing 51 to cover the casing opening 511.

[0134] The cover plate 53 serves to seal the casing 51, blocking external impurities from entering the casing 51 and reducing the risk of the electrical device 52 being corroded and damaged by the external impurities.

[0135] In some embodiments, the cover plate 53 is removably connected to the casing 51. If the electrical device 52 malfunctions, the cover plate 53 can be removed, thereby facilitating maintenance of the electrical device 52.

[0136] In some embodiments, the battery cells 20 are fixed to the top wall 10b. The top wall 10b can simultaneously serve to mount the battery cells 20 and exchange heat with the battery cells 20. Fixing the battery cells 20 to the top wall 10b can further reduce the relative movement between the battery cells 20 and the top wall 10b when the battery 2 is subjected to an external impact, thereby improving the stability of heat exchange between the top wall 10b and the battery cells 20.

[0137] In some embodiments, the battery cells 20 are glued to the top wall 10b, the glueing process being simple and highly stable.

[0138] In some embodiments, the battery cells 20 are bonded to the top wall 10b by a thermally conductive adhesive, which has a relatively low thermal resistance. By using the thermally conductive adhesive to bond the battery cells 20 to the top wall 10b, the heat exchange efficiency between the top wall 10b and the battery cells 20 can be improved.

[0139] In some embodiments, the electrode terminal 23 is provided on the side of the battery cell 20 away from the top wall 10b.

[0140] The electrode terminals 23 are usually installed so as to protrude from the exterior casing 21. By installing the electrode terminals 23 on the side away from the top wall 10b of the battery cells 20, the risk of the bus members connected to the electrode terminals 23 interfering with the top wall 10b is reduced, the heat exchange area between the battery cells 20 and the top wall 10b is increased, and the heat exchange efficiency can be improved.

[0141] In some embodiments, the two electrode terminals 23 are both located on the side of the battery cell 20 away from the top wall 10b.

[0142] In some embodiments, the battery casing 211 includes a casing bottom wall 2111 facing the end cap 212, and the casing bottom wall 2111 is bonded to the top wall 10b. Two electrode terminals 23 are attached to the end cap 212.

[0143] In some embodiments, a pressure release mechanism 24 is provided on the side of the battery cell 20 away from the top wall 10b. If thermal runaway occurs in the battery cell 20, the high-temperature, high-pressure substance released through the pressure release mechanism 24 will not directly impinge on the top wall 10b, thereby reducing the risk of melting the top wall 10b and reducing leakage of the heat exchange medium.

[0144] In some embodiments, the electrode terminal 23 and the pressure release mechanism 24 are both located on the side of the battery cell 20 away from the top wall 10b.

[0145] In some embodiments, the case 10 includes a frame 12, a heat exchange plate 11, and a base plate 13, the heat exchange plate 11 and the base plate 13 being located on the upper and lower sides, respectively, of the frame 12 along the vertical direction Z, and the frame 12, the heat exchange plate 11, and the base plate 13 define an accommodating cavity 10a. The top wall 10b includes the heat exchange plate 11 used for heat exchange with the battery cells 20.

[0146] By integrating the heat exchange plate 11 on the case 10, the number of parts of the battery 2 can be reduced, the integration degree of the battery 2 can be improved, and the energy density of the battery 2 can be improved.

[0147] In some embodiments, the battery cells 20 are fixed to the heat exchange plate 11. The base plate 13 does not need to support the battery cells 20, which reduces the strength requirements for the base plate 13, thereby reducing the thickness and weight of the base plate 13 and improving the energy density of the battery 2.

[0148] In some embodiments, the frame 12 includes two first beams 121 and two second beams 122, where the two first beams 121 are arranged opposite each other along a first direction X, and the two second beams 122 are arranged 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, respectively.

[0149] In some embodiments, the battery 2 further includes a second connecting member 60 connected to the protective plate 30 , the heat exchange plate 11 and the frame 12 .

[0150] The second connecting member 60 simultaneously fixes the protection plate 30 and the heat exchange plate 11 to the frame 12, thereby improving the stability of the protection plate 30 and the heat exchange plate 11.

[0151] In some embodiments, the second connecting member 60 passes through the protection plate 30 and the heat exchange plate 11 in the vertical direction Z and is fixed to the frame 12 .

[0152] In some embodiments, there are multiple second connecting members 60, and the multiple second connecting members 60 are spaced apart along the circumferential direction of the frame 12.

[0153] In some embodiments, the second connecting member 60 may include a FDS (flow drill screw), a bolt, or other fastener.

[0154] In some embodiments, the heat exchange plate 11 includes a first plate 112 and a second plate 113 stacked along the vertical direction Z, the first plate 112 being located below the second plate 113 along the vertical direction Z, the first plate 112 being connected to the battery cell 20, and the second plate 113 being connected to the protective plate 30. The flow path 111 is formed between the first plate 112 and the second plate 113.

[0155] The first plate 112 and the second plate 113 can be molded independently, which allows for flexible configuration of the shape of the flow path 111, reduces the difficulty of molding the heat exchange plate 11, and improves the uniformity of heat exchange.

[0156] In some embodiments, the first plate 112 and the second plate 113 are welded together, with the weld seam between the first plate 112 and the second plate 113 being circumferential to improve sealing.

[0157] In some embodiments, the first plate 112 is a flat plate. The surface of the first plate 112 is flat, which is convenient for placing the battery cells 20 thereon.

[0158] In some embodiments, the second plate 113 has a first recess 113 a on the side facing the first plate 112 , and the first plate 112 covers the first recess 113 a to form the flow channel 111 .

[0159] In some embodiments, the second plate 113 has a first protrusion 113b formed at a position corresponding to the first recess 113a, and the first protrusion 113b protrudes toward the side away from the first plate 112. By providing the first protrusion 113b, the depth of the first recess 113a is increased, the current passing area of ​​the flow path 111 is increased, and the effect of the first recess 113a on the strength of the second plate 113 is reduced, thereby improving the reliability of the second plate 113.

[0160] In some embodiments, the shapes of the first protrusions 113b and the first recesses 113a correspond to each other.

[0161] In some embodiments, the second plate 113 can be stamped to form the first protrusions 113b and the first recesses 113a.

[0162] In some embodiments, the heat exchange plate 11 further includes an inlet and an outlet (not shown), and the flow passage 111 communicates with the inlet and the outlet. The heat exchange medium can flow into the flow passage 111 through the inlet and out through the outlet.

[0163] In some embodiments, the inlet may be located on the first plate 112 and the second plate 113. The outlet may be located on the first plate 112 and the second plate 113.

[0164] In some embodiments, the second connecting member 60 passes through the first plate 112 and the second plate 113 .

[0165] FIG. 7 is a schematic top view of a battery provided according to some embodiments of the present application, FIG. 8 is a schematic cross-sectional view along the direction BB in FIG. 7, FIG. 9 is an enlarged schematic view of the circled area in FIG. 8, FIG. 10 is an enlarged schematic view of the blocked area in FIG. 9, FIG. 11 is a schematic top view of a protective plate of a battery provided according to some embodiments of the present application, FIG. 12 is a schematic cross-sectional view along the direction CC in FIG. 11, and FIG. 13 is an enlarged schematic view of the circled area in FIG. 12.

[0166] 5 to 12, in some embodiments, the top wall 10b includes a channel region 11a and a non-channel region 11b, and the channel 111 is located in the channel region 11a.

[0167] For example, the flow path region 11a is a substantial region of the top wall 10b that overlaps with the flow path 111 in the vertical direction Z, and the non-flow path region 11b is a substantial region of the top wall 10b that does not overlap with the flow path 111 in the vertical direction Z.

[0168] In some embodiments, the non-flow path region 11b includes a portion where the first plate 112 and the second plate 113 are bonded to each other. The flow path region 11a includes a first protrusion 113b of the second plate 113 and a portion of the first plate 112 that corresponds to the first protrusion 113b in the vertical direction Z.

[0169] In some embodiments, in the vertical direction Z, the projection of the flow field 11 a lies within the projection of the protective plate 30 .

[0170] The protective plate 30 can protect the flow path region 11a from above so as to reduce the impact force that the flow path region 11a receives from above, reduce deformation of the flow path region 11a, improve the uniformity of heat exchange, reduce the risk of the flow path region 11a bursting, and improve the reliability of the battery 2.

[0171] In some embodiments, the flow path region 11a is spaced apart from the protective plate 30 in the vertical direction Z.

[0172] When the upper side of the protective plate 30 is subjected to pressure, the protective plate 30 may deform downward. Installing the flow path area 11a and the protective plate 30 with a gap between them provides space for the protective plate 30 to deform, thereby reducing the risk of the protective plate 30 directly pressing against the flow path area 11a.

[0173] In some embodiments, the protective plate 30 is fixed to the non-flow-path region 11b.

[0174] For example, the protection plate 30 is fixed to the non-flow path region 11b by adhesive, welding, connection with fasteners, or other methods.

[0175] The non-flow path region 11b does not have a flow path 111 installed, and by fixing the protective plate 30 to the non-flow path region 11b, when the protective plate 30 is subjected to an impact, the force transmitted to the flow path region 11a can be reduced, and deformation of the flow path 111 can be reduced.

[0176] In some embodiments, a second recess 31 is provided on the side of the protective plate 30 facing the top wall 10b, and the projection of the flow path region 11a along the vertical direction Z is located within the projection of the second recess 31.

[0177] For example, along the vertical direction Z, the flow channel region 11a may protrude upward relative to the non-flow channel region 11b, or may protrude downward relative to the non-flow channel region 11b.

[0178] By providing the second recess 31, the flow path region 11a can be avoided, the distance between the bottom surface of the second recess 31 and the flow path region 11a can be increased, and the risk of the protective plate 30 directly pressing against the flow path region 11a can be reduced.

[0179] In some embodiments, the protective plate 30 includes an edge 33 and a second protrusion 32 that are arranged to surround the second recess 31, the position of the second protrusion 32 corresponding to the second recess 31, and the second protrusion 32 protrudes from the side of the edge 33 that is away from the top wall 10b. By providing the second protrusion 32, the depth of the second recess 31 can be increased, and the strength of the protective plate 30 can be improved.

[0180] In some embodiments, the edge 33 abuts and is secured to the non-channel region 11b.

[0181] In some embodiments, the second connecting member 60 is connected to the edge 33 , the non-flow-path region 11 b and the frame 12 .

[0182] In some embodiments, the non-channel region 11 b has a first surface 114 facing the apron 30 , and at least a portion of the channel region 11 a protrudes from the first surface 114 .

[0183] Illustratively, the first protrusion 113 b of the second plate 113 protrudes from the first surface 114 .

[0184] In some embodiments, the portion of the flow path region 11a that protrudes from the first surface 114 is accommodated in the second recess 31. The second recess 31 avoids the flow path region 11a and provides space for the flow path region 11a, thereby improving space utilization.

[0185] In some embodiments, a structural adhesive is disposed in the second recess 31, and the structural adhesive bonds the flow path region 11a and the protective plate 30. By bonding the flow path region 11a and the protective plate 30 together, the structural adhesive can improve the connection strength between the flow path region 11a and the protective plate 30 and improve the stability of the battery 2.

[0186] The second recess 31 can provide a positional restriction for the structural adhesive and reduce spillage of the structural adhesive.

[0187] The structural adhesive is relatively soft, and when the protective plate 30 is subjected to pressure, the structural adhesive can deform to provide space for deformation of the protective plate 30, thereby reducing the force transmitted to the flow path region 11a.

[0188] In some embodiments, the projection of top wall 10b in the vertical direction Z is located within the projection of protective plate 30. Protective plate 30 completely covers top wall 10b from above, thereby protecting top wall 10b and reducing the impact that top wall 10b receives.

[0189] FIG. 14 is a schematic top view of a protection plate provided according to some other embodiments of the present application, and FIG. 15 is a schematic local cross-sectional view along the DD direction.

[0190] 14 and 15, in some embodiments, the apron 30 includes a base region 30a and a thickened region 30b that has a thickness greater than the thickness of the base region 30a.

[0191] By installing a thickened region 30b in the protective plate 30, the local strength of the protective plate 30 can be increased, and the position of the thickened region 30b in the protective plate 30 can be selected according to the strength requirements. Compared to the method of thickening the entire protective plate 30, the embodiment of the present application can reduce the weight of the protective plate 30, provided that the strength requirements are met.

[0192] The number of thick-walled regions 30b may be one or more.

[0193] In some embodiments, the sheet beam may be attached to the thickened region 30b.

[0194] In some embodiments, the second connecting member 60 is connected to the thickened region 30b and the top wall 10b.

[0195] In some embodiments, the apron 30 is a one-piece structure.

[0196] In some embodiments, base region 30a and thickened region 30b are separately formed plates that are connected together by welding.

[0197] In some embodiments, the protection plate 30 includes a substrate and a thick plate stacked along the vertical direction Z, with the area of ​​the thick plate being smaller than the area of ​​the substrate. The thick region 30b includes the thick plate and a portion of the substrate that overlaps the thick plate, and the base region 30a includes a portion of the substrate that does not overlap the thick plate.

[0198] FIG. 16 is a cross-sectional schematic view of an apron provided according to some other embodiments of the present application.

[0199] 16, in some embodiments, the protective plate 30 comprises a metal-plastic composite material, which can combine the mechanical properties of metal with the thermal insulation properties of plastic.

[0200] In some embodiments, the protection plate 30 includes a metal substrate 30c and a plastic layer 30d covering the surface of the metal substrate 30c. The plastic layer 30d has excellent abrasion resistance, thereby reducing the abrasion of the protection plate 30.

[0201] In some embodiments, the metal substrate 30c may be a steel plate.

[0202] In some embodiments, the material of plastic layer 30d is an insulating plastic.

[0203] FIG. 17 is a schematic top view of a battery provided according to some other embodiments of the present application, FIG. 18 is a schematic cross-sectional view taken along the E-E direction of FIG. 17, FIG. 19 is an enlarged schematic view of the circled area of ​​FIG. 18, and FIG. 20 is an exploded schematic view of some components of the battery shown in FIG. 17.

[0204] 17 to 20, in some embodiments, the reinforcing structure 40 includes a mounting plate 42 and a first connecting member 43 fixed to the mounting plate 42, where the mounting plate 42 is fixed to the protective plate 30 and the first connecting member 43 is used to connect to an external member.

[0205] The number of first connecting members 43 may be one or more.

[0206] The first connecting member 43 provides attachment points for several components of an electrical device, thereby reducing parts, increasing integration, and simplifying the assembly process.

[0207] For example, when the battery 2 is applied to a vehicle, the first connecting member 43 may be used to connect to a seat beam 6 of the vehicle.

[0208] In some embodiments, there is a plurality of first connection members 43. Optionally, the plurality of first connection members 43 are arranged along the first direction X.

[0209] In some embodiments, the first connecting member 43 comprises a rivet bolt.

[0210] In some embodiments, the mounting plate 42 includes a third protrusion 421 that protrudes toward a side away from the protective plate 30, and a third recess 422 is formed inside the third protrusion 421. A portion of the first connecting member 43 is housed in the third recess 422, and passes through the third protrusion 421 to be fixed to the third protrusion 421.

[0211] In some embodiments, the seat beam 6 abuts against the third protrusion 421 and is fixed to the third protrusion 421 .

[0212] FIG. 21 is a schematic diagram of an electrical device provided in accordance with some other embodiments of the present application.

[0213] 21, the present application further provides an electric device including the battery 2 of any one of the above embodiments, wherein the battery 2 is used to provide electric energy to the electric device. The electric device may be any one of the above-mentioned facilities or systems to which the battery 2 is applied.

[0214] In some embodiments, the electrical device is a vehicle, and the top wall 10b can be embedded inside the vehicle, thereby reducing the risk of the top wall 10b being subjected to external impacts.

[0215] In some embodiments, the protective plate 30 is at least a part of the vehicle floor. Using the protective plate 30 of the battery 2 as the floor can save vehicle parts, improve vehicle integration, and simplify the vehicle assembly process. The protective plate 30 can withstand being stepped on by passengers, reduce deformation of the flow path 111, and improve the uniformity of heat exchange.

[0216] In some embodiments, the vehicle includes a seat 5 connected to a protective plate 30. The protective plate 30 can support the seat 5 and improve the space utilization of the entire vehicle.

[0217] In some embodiments, the sheet 5 is attached to a beam structure of the reinforcing structure 40 .

[0218] In some alternative embodiments, the vehicle further includes a seat beam 6 secured to the first connecting member 43. The seat 5 is attached to the seat beam. The protective panel 30 is mounted to the seat beam 6 by the first connecting member 43.

[0219] Referring to FIGS. 2 to 6, an embodiment of the present application provides a battery 2 including a case 10, a battery cell 20, a protective plate 30, a reinforcing structure 40, and a power distribution board 50.

[0220] The case 10 includes a frame 12, a heat exchanger plate 11, and a base plate 13. The heat exchanger plate 11 and the base 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 exchanger plate 11, and the base plate 13 define a housing cavity 10a. The battery cells 20 are housed in the housing cavity 10a and bonded to the heat exchanger plate 11. The heat exchanger plate 11 has flow paths 111 therein for a heat exchange medium to flow, and is used for heat exchange with the battery cells 20. An electrode terminal 23 and a pressure release mechanism 24 are provided on the side of the battery cells 20 away from the heat exchanger plate 11.

[0221] The protective plate 30 is installed on the side of the heat exchange plate 11 that is away from the battery cells 20 and is connected to the heat exchange plate 11. The reinforcing structure 40 is installed on the side of the protective plate 30 that is away from the heat exchange plate 11 and is fixed to the protective plate 30. The reinforcing structure 40 is used to attach a vehicle seat 5.

[0222] The distribution board 50 includes a casing 51 and an electrical device 52 housed in the casing 51, the casing 51 being installed on the side of the protective plate 30 away from the heat exchange plate 11 and fixed to the protective plate 30, and the electrical device 52 being electrically connected to the battery cell 20.

[0223] The heat exchange plate 11 includes a first plate 112 and a second plate 113 stacked along the vertical direction Z, with the first plate 112 located below the second plate 113 along the vertical direction Z, the first plate 112 connected to the battery cell 20, and the second plate 113 connected to the protective plate 30. A flow path 111 is formed between the first plate 112 and the second plate 113.

[0224] It should be noted that, unless there is a contradiction, the embodiments and features of the embodiments of the present application can be combined with each other.

[0225] Finally, it should be noted that the above embodiments are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art may still amend the technical solutions described in the above embodiments or equivalently replace some of the technical features thereof, but it should be understood that such amendments or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery, a case having a storage cavity, the case including a top wall positioned above the storage cavity along a vertical direction and having a flow path therein for a heat exchange medium to flow; a battery cell accommodated in the accommodation cavity; a protective plate disposed on a side of the top wall away from the battery cell and connected to the top wall, battery.

2. The protective plate further includes a reinforcing structure disposed on a side of the protective plate away from the top wall and fixed to the protective plate. The battery of claim 1 .

3. The reinforcing structure is adapted to be connected to an external member. The battery of claim 2.

4. The reinforcing structure includes a beam structure. The battery according to claim 2 or 3.

5. The reinforcing structure includes a mounting plate and a first connecting member fixed to the mounting plate, the mounting plate being fixed to the protective plate, and the first connecting member being used to connect to an external member. The battery according to claim 2 or 3.

6. the case includes a frame, a heat exchange plate, and a base plate, the heat exchange plate and the base plate being respectively located on the upper and lower sides of the frame along the vertical direction, the frame, the heat exchange plate, and the base plate defining the accommodating cavity; the top wall includes the heat exchange plate for exchanging heat with the battery cells; The battery according to any one of claims 1 to 5.

7. a second connecting member connected to the protection plate, the heat exchange plate, and the frame; The battery of claim 6.

8. the heat exchange plate includes a first plate and a second plate stacked along the vertical direction, the first plate being located below the second plate in the vertical direction, the first plate being a flat plate and connected to the battery cell, and the second plate being connected to the protection plate; a first recess is provided on a side of the second plate facing the first plate, the first plate covers the first recess to form the flow path, and the second plate has a first protrusion formed at a position corresponding to the first recess, the first protrusion protruding toward a side away from the first plate; The battery according to claim 6 or 7.

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

10. the top wall includes a channel region and a non-channel region, the channel being located in the channel region; The flow path region and the protective plate are disposed with a gap in the vertical direction. The battery according to any one of claims 1 to 9.

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

12. the non-flow path region has a first surface facing the protection plate, at least a portion of the flow path region protrudes from the first surface, and the portion of the flow path region protruding from the first surface is accommodated in the second recess. The battery of claim 11.

13. The protective plate is adhered to the top wall. The battery according to any one of claims 1 to 12.

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

15. The protective plate includes a base region and a thick region having a thickness greater than that of the base region. The battery according to any one of claims 1 to 14.

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

17. The present invention further includes a power distribution board including a casing and an electric device housed in the casing, wherein the casing is installed on a side of the protective plate away from the top wall and fixed to the protective plate, and the electric device is electrically connected to the battery cell. The battery according to any one of claims 1 to 16.

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

19. The battery cell is adhered to the top wall.

20. The battery of claim 18.

20. An electrode terminal and / or a pressure release mechanism is provided on the side of the battery cell away from the top wall.

20. The battery of claim 18 or 19.

21. 21. A battery according to claim 1, used to provide electrical energy. Electrical equipment.

22. the electrical device is a vehicle; 22. An electrical device according to claim 21.

23. The protective plate is at least a part of the floor of the vehicle.

23. An electrical device according to claim 22.

24. The vehicle includes a seat connected to the protective plate.

24. An electrical device according to claim 22 or 23.

Images