Batteries and electrical devices

Abstract

An embodiment of the present application provides a battery and an electric device. The battery includes a frame, battery cells, a first beam, and a heat exchange plate. The frame surrounds and forms a storage space. One end of the storage space has a first opening. The battery cells are installed in the storage space. The first beam is installed in the storage space and is used to restrict expansion of the battery cells, and both ends of the first beam are connected to the frame. The heat exchange plate covers the first opening and is used for heat exchange with the battery cells. The heat exchange plate is fixedly connected to the frame and the first beam. When the battery is subjected to an external impact, the frame and the first beam can restrain the heat exchange plate, thereby reducing relative movement between the heat exchange plate and the battery cells and improving heat exchange uniformity.

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 electrical device that can improve reliability.

[0005] In a first aspect, an embodiment of the present application provides a battery including a frame, a battery cell, a first beam, and a heat exchanger plate. The frame surrounds and forms a storage space. One end of the storage space has a first opening. The battery cell is installed in the storage space. The first beam is installed in the storage space and is used to restrict expansion of the battery cell, and both ends of the first beam are connected to the frame. The heat exchanger plate covers the first opening and is used for heat exchange with the battery cell, and is fixedly connected to the frame and the first beam.

[0006] When the battery is subjected to an external impact, the frame and the first beam can restrain the heat exchanger plate, thereby reducing the relative movement between the heat exchanger plate and the battery cells and improving the uniformity of heat exchange. In addition, the first beam distributes the force at the connection point between the heat exchanger plate and the frame, reducing the risk of the connection between the heat exchanger plate and the frame becoming loose, improving the sealing performance of the battery and increasing the reliability of the battery.

[0007] In some embodiments, the heat exchange plate includes a flow area where a flow path for a heat exchange medium is provided and a non-flow area, and the non-flow area is fixed to the frame and the first beam.

[0008] No flow paths are formed in the non-flow path area, and by fixing the non-flow path area to the frame and the first beam, when the battery is subjected to external impact, the force transmitted to the flow path area is reduced, deformation of the flow path is reduced, the uniformity of heat exchange is improved, and the risk of damage to the flow path area and leakage of the heat exchange medium is reduced.

[0009] In some embodiments, the battery further includes a protective plate disposed on a side of the heat exchange plate away from the battery cells and connected to the heat exchange plate.

[0010] The protective plate can protect the heat exchange plate, reduce the risk of external impurities directly impacting the heat exchange plate, reduce deformation of the heat exchange plate, improve the uniformity of heat exchange, reduce the risk of heat exchange medium leakage, and improve the reliability of the battery.

[0011] In some embodiments, a first recess is provided on the side of the protection plate facing the heat exchange plate. The heat exchange plate includes a flow path region in which a flow path for a heat exchange medium is provided and a non-flow path region. In the thickness direction of the heat exchange plate, the projection of the flow path region along the thickness direction is located within the projection of the first recess. The protection plate includes an edge portion installed to surround the first recess, the edge portion abutting the non-flow path region, and the edge portion, the non-flow path region, and the frame are fixedly connected.

[0012] The placement of the first recess avoids the flow channel area, increasing the distance between the bottom of the first recess and the flow channel area, reducing the risk of the protective plate pressing directly against the flow channel area. The edge is located on the outer periphery of the protective plate, and by securing the edge to the non-flow channel area and the frame, the stability of the protective plate can be improved. The edge abuts the non-flow channel area and seals the first recess.

[0013] In some embodiments, the bottom surface of the first recess and the flow path region are spaced apart in the thickness direction. When the protection plate is subjected to pressure, it may deform. By spaced apart the flow path region and the bottom surface of the first recess, a space is provided for the protection plate to deform, thereby reducing the risk of the protection plate directly pressing against the flow path region.

[0014] In some embodiments, the protective plate further includes a first protrusion protruding from a bottom surface of the first recess, the first protrusion abutting the non-flow path region, and the first protrusion, the non-flow path region, and the first beam are fixedly connected.

[0015] The first protrusion can compensate for the gap between the bottom surface of the first recess and the non-flow channel region, thereby abutting the non-flow channel region, and further realizing a fixed connection between the first protrusion, the non-flow channel region and the first beam, thereby improving the strength of the battery.

[0016] In some embodiments, the protection plate further includes a second protrusion protruding from a surface away from the non-flow-path region of the edge, and the first recess is formed at a position corresponding to the second protrusion of the protection plate. The first protrusion is connected to the second protrusion. By providing the second protrusion, the depth of the first recess can be increased, thereby improving the strength of the protection plate.

[0017] In some embodiments, the protective plate further has a second recess recessed from the surface of the protective plate facing away from the heat exchange plate, and the second recess is formed at a position corresponding to the first protrusion of the protective plate.

[0018] By providing the second recess, the molding process of the protection plate can be simplified, the weight of the protection plate can be reduced, and the difficulty of connecting the first protrusion and the non-flow path region can be reduced.

[0019] In some embodiments, the battery further includes a power distribution board including a casing and an electric device, the casing being located on a side of the protective plate away from the heat exchange plate, the casing and the protective plate defining an accommodating cavity, the electric device being installed in the accommodating cavity and electrically connected to the battery cells, the casing having an end face at one end facing the protective plate, the end face abutting the protective plate, and a projection of the end face and a projection of the second recess do not overlap in the thickness direction.

[0020] The switchboard is installed on the side of the protective plate away from the heat exchange plate. In the event of thermal runaway in a battery cell, the protective plate and heat exchange plate protect the switchboard, reducing the risk of high-temperature materials emitted from the battery cell damaging electrical devices. The heat exchange plate also exchanges heat with the switchboard through the protective plate, thereby regulating the temperature of the switchboard. Installing the switchboard outside the frame further improves the utilization rate of the battery's internal space. The switchboard is installed away from the end face of the casing and the second recess, thereby reducing the risk of the second recess communicating with the space inside and outside the casing and improving the sealing and reliability of the switchboard.

[0021] In some embodiments, the first beam extends along a first direction, and the protection plate has a plurality of second recesses spaced apart along the first direction. A portion of the end surface is fixed to a portion of the protection plate located between two adjacent second recesses. By fixing the casing using the portion between the second recesses, it is possible to avoid the second recesses and the end surface of the casing, and further improve space utilization.

[0022] In some embodiments, the protective plate further includes a third protrusion protruding from the bottom surface of the first recess, the third protrusion abutting the non-channel region, and the third protrusion, the non-channel region, and the frame are fixedly connected together. The third protrusion can compensate for the gap between the bottom surface of the first recess and the non-channel region, thereby abutting the non-channel region, and further realizing the fixed connection between the third protrusion, the non-channel region, and the frame, thereby improving the strength of the battery.

[0023] In some embodiments, the protection plate includes a plurality of third protrusions spaced apart along a first direction, with a portion of the flow path region located between two adjacent third protrusions in the first direction. This embodiment can utilize the space between the third protrusions to improve space utilization while avoiding the third protrusions and the flow path region.

[0024] In some embodiments, the frame includes a second beam and a third beam disposed opposite each other along a second direction, and the first beam, the second beam, and the third beam all extend along a first direction perpendicular to the second direction. In the second direction, the battery cell is located between the second beam and the first beam. The third protrusion, the non-flow path region, and the second beam are fixedly connected.

[0025] The first and second beams are used to restrict the battery cells from both sides, and the third protrusion, the non-flow passage area, and the second beams are fixedly connected to improve the structural strength of the battery and reduce the risk of the connection between the heat exchange plate and the frame becoming loose.

[0026] In some embodiments, the minimum dimension of the second beam in the second direction is larger than the minimum dimension of the third beam, and the second beam has a relatively large dimension and strength, and can not only withstand the expansion force of the battery cell, but also be fixedly connected to the third protrusion and edge portion at the same time, thereby improving the structural strength of the entire battery.

[0027] In some embodiments, the battery further includes a first connecting member that secures the protection plate, the heat exchange plate, and the frame, and a second connecting member that secures the protection plate, the heat exchange plate, and the first beam.

[0028] The first connecting member simultaneously fixes the protection plate and the heat exchanger plate to the frame, thereby improving the stability of the protection plate and the heat exchanger plate.The second connecting member simultaneously fixes the protection plate and the heat exchanger plate to the first beam, thereby improving the stability of the protection plate and the heat exchanger plate.

[0029] In some embodiments, the battery further includes a reinforcing beam disposed on the side of the protective plate away from the heat exchange plate 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 heat exchange plate, and improve the reliability of the battery.

[0030] In some embodiments, the reinforcement beam is used to mount a vehicle seat. Embodiments of the present application may eliminate the mounting beam of the vehicle seat, thereby saving vehicle parts, improving vehicle integration, and simplifying the vehicle assembly process.

[0031] In some embodiments, the heat exchange plate includes a flow path region where a flow path for a heat exchange medium is provided and a non-flow path region. At least one of the flow path region and the non-flow path region is bonded to the protection plate. By bonding the flow path region or the non-flow path region to the protection plate, the connection strength between the heat exchange plate and the protection plate can be improved, thereby improving the stability of the battery.

[0032] In some embodiments, the first opening is located at the vertical upper end of the accommodating space, and the heat exchange plate is located above the frame. Because the heat exchange plate is located above the frame, when the underside of the battery is subjected to an external impact, the impact force on the heat exchange plate is relatively small, thereby reducing deformation of the heat exchange plate, improving heat exchange uniformity, reducing the risk of heat exchange medium leakage, and improving battery reliability.

[0033] In some embodiments, the battery cells are fixed to a heat exchange plate. The heat exchange plate can simultaneously support the battery cells and exchange heat with the battery cells. By fixing the battery cells to the heat exchange plate, the relative movement between the battery cells and the heat exchange plate can be reduced when the battery is subjected to external impact, and the stability of heat exchange between the heat exchange plate and the battery cells can be improved.

[0034] In some embodiments, the other end of the storage space has a second opening. The battery further includes a base plate that covers the second opening and is connected to the frame. The base plate and the heat exchange plate can seal the storage space from both sides, thereby improving the sealing performance of the battery.

[0035] In a second aspect, embodiments of the present application further provide an electrical device including a battery provided by any one of the embodiments of the first aspect, wherein the battery is used to provide electrical energy. [Brief explanation of the drawings]

[0036] 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 battery cell shown in FIG. 2. [Figure 4] FIG. 3 is an enlarged schematic view of a portion A enclosed by a circle in FIG. 2. [Figure 5] FIG. 3 is a structural schematic diagram of some components of the battery shown in FIG. 2. [Figure 6] FIG. 6 is an enlarged schematic view of a portion C enclosed in a circle in FIG. 5. [Figure 7]FIG. 7 is a schematic local cross-sectional view taken along the EE direction of FIG. 6. [Figure 8] 1 is a top view schematic diagram of a battery provided in accordance with some embodiments of the present application. [Figure 9] FIG. 9 is a schematic cross-sectional view taken along the FF direction in FIG. 8. [Figure 10] FIG. 10 is an enlarged schematic view of the circled area in FIG. 9. [Figure 11] FIG. 6 is an enlarged schematic view of a portion D in a circle in FIG. 5. [Figure 12] 1 is a bottom schematic view of a protective plate of a battery provided by some embodiments of the present application. [Figure 13] 1 is a schematic top view of a protective plate, a heat exchange plate, and a casing of a battery provided in accordance with some embodiments of the present application. [Figure 14] FIG. 14 is a schematic local cross-sectional view taken along the direction GG in FIG. 13. [Figure 15] FIG. 15 is an enlarged schematic view of a block portion of FIG. 14. [Figure 16] FIG. 9 is an enlarged schematic view of the circled area in FIG. 8. [Figure 17] FIG. 14 is a schematic local cross-sectional view taken along the HH direction in FIG. [Figure 18] FIG. 18 is an enlarged schematic view of the circled area in FIG. 17. [Figure 19] FIG. 3 is an enlarged schematic view of a portion B enclosed in a circle in FIG. 2. [Figure 20] 1 is a schematic diagram of an electrical device provided in accordance with some other embodiments of the present application.

[0037] The symbols are explained as follows: 1 vehicle, 2 battery, 3 controller, 4 motor, 5 seat, 10 frame, 10a accommodation space, 10b first opening, 10c second opening, 11 second beam, 12 third beam, 13 fourth beam, 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 heat exchange plate, 30a flow path region, 30b non-flow path region, 31 flow path, 32 first plate, 33 second plate, 331 fourth recess, 332 fourth protrusion, 40 First beam, 50 protective plate, 51 first recess, 511 bottom surface of first recess, 52 edge, 53 first protrusion, 531 upper surface of first protrusion, 54 second protrusion, 541 upper surface of second protrusion, 55 second recess, 56 third protrusion, 57 third recess, 60 reinforcing beam, 70 distribution board, 71 casing, 711 casing opening, 712 end face, 72 electrical device, 73 cover plate, 80 base plate, 90 first connecting member, 91 second connecting member, X first direction, Y second direction, Z thickness direction. DETAILED DESCRIPTION OF THE INVENTION

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] The term "plurality" as used herein refers to two or more (including two).

[0046] 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.

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] However, separate heat exchange plates take up space, thereby reducing the energy density of the battery.

[0053] In some embodiments, the battery integrates the case and the heat exchange plate, and the heat exchange plate forms the case wall of the case, thereby saving materials, simplifying the battery structure, and improving energy density.

[0054] Since different electrical devices have different usage scenarios, batteries are required to be adaptable to various harsh usage scenarios when applied to different electrical devices. The heat exchange plate is usually fixed only to the frame of the case, and if the battery vibrates, the frame may not sufficiently restrain the heat exchange plate, causing the heat exchange plate to be significantly misaligned with the battery cells, resulting in uneven heat exchange. If the battery vibrates severely, the connection between the heat exchange plate and the frame may be lost, affecting the reliability of the battery.

[0055] In view of this, the embodiments of the present application provide a technical solution that simultaneously fixes the heat exchanger plate to the case frame and the beams within the frame, thereby improving the stability of the heat exchanger plate, reducing the relative movement between the heat exchanger plate and the battery cells, improving the uniformity of heat exchange, and reducing the risk of the connection between the heat exchanger plate and the frame becoming loose, thereby improving the reliability of the battery.

[0056] The battery described in the embodiments of the present application is applied to an electrical device that uses a battery.

[0057] 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, 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.

[0058] For convenience of explanation, the following embodiment will be described by taking the case where the electrical device is a vehicle as an example.

[0059] FIG. 1 is a structural schematic diagram of a vehicle provided according to some embodiments of the present application.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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 battery cell shown in FIG. 2, FIG. 4 is an enlarged schematic view of the area enclosed by the circle A in FIG. 2, and FIG. 5 is a structural schematic view of some components of the battery shown in FIG. 2.

[0064] 2 to 5, a battery 2 according to an embodiment of the present invention includes a frame 10 and battery cells 20. The frame 10 surrounds and forms an accommodating space 10a, and the battery cells 20 are installed in the accommodating space 10a.

[0065] 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.

[0066] 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 within the accommodation space 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, and then accommodated within the accommodation space 10a.

[0067] 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.

[0068] The frame 10 may be a rectangular frame 10, a circular frame 10, a polygonal frame 10, an oval frame 10, or a frame 10 of other shapes.

[0069] The frame 10 may be made of steel, aluminum, aluminum alloy, or other materials.

[0070] The frame 10 protects the battery cells 20 from the outer periphery, and can reduce the risk of the battery cells 20 being impacted by external impurities.

[0071] 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 .

[0072] 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.

[0073] 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.

[0074] During the charging and discharging process of the battery cell 20, the positive electrode active material and the negative electrode active material react with the electrolyte to generate a current, which is then led out by the tabs.

[0075] The outer casing 21 has a hollow structure, and an internal cavity is formed therein for accommodating 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] In some embodiments, the electrode terminals 23 are attached to the cell casing 211 or the end caps 212 .

[0080] 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.

[0081] In some embodiments, the battery cell 20 further includes a pressure relief mechanism 24 .

[0082] 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.

[0083] 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.

[0084] 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.

[0085] In some embodiments, pressure relief mechanism 24 may be located in cell casing 211 or in end cap 212 .

[0086] In some embodiments, one end of the storage space 10a has a first opening 10b. The battery 2 further includes a heat exchange plate 30, which is fixed to the frame 10 and covers the first opening 10b, and is used for heat exchange with the battery cells 20.

[0087] The heat exchange plate 30 may be a single molded member, or may be formed by connecting a number of independently molded members.

[0088] For example, the first opening 10b may be located at the upper end of the receiving space 10a, or at the lower end of the receiving space 10a, or at a side end of the receiving space 10a.

[0089] The battery cells 20 may be fixed to the heat exchange plate 30 , may be fixed to the frame 10 , and may also be fixed to other components of the battery 2 .

[0090] As an example, the electrode terminals 23 of the battery cells 20 can face toward the heat exchange plate 30 , or can face away from the heat exchange plate 30 , and can also face toward the frame 10 .

[0091] As an example, the pressure release mechanism 24 of the battery cell 20 can face toward the heat exchange plate 30 , or can face away from the heat exchange plate 30 , or can face toward the frame 10 .

[0092] The heat exchange plates 30 may be connected to the frame 10 by adhesive, fasteners, welding, engagement, or other methods.

[0093] The heat exchange plate 30 can simultaneously serve to seal the first opening 10b and to exchange heat with the battery cell 20, thereby saving components, simplifying the structure of the battery 2, improving the integration degree of the battery 2, and improving the energy density of the battery 2.

[0094] In some embodiments, the battery 2 further includes a first beam 40 installed in the storage space 10a, and both ends of the first beam 40 are connected to the frame 10. The first beam 40 can improve the overall strength of the battery 2.

[0095] In some embodiments, the first beam 40 is used to limit the expansion of the battery cell 20. By way of example, the first beam 40 may also be referred to as an expansion limiting beam.

[0096] The battery cells 20 expand during charging and discharging, but the first beams 40 limit the expansion of the battery cells 20, reducing deformation of the battery cells 20 and improving the charge and discharge performance of the battery cells 20. In addition, the first beams 40 can withstand the expansion force of the battery cells 20, thereby reducing the force applied to the frame 10 and reducing deformation of the frame 10, thereby improving the reliability of the battery 2.

[0097] In some embodiments, the heat exchange plate 30 is fixedly connected to the frame 10 and the first beam 40. When the battery 2 is subjected to an external impact, the frame 10 and the first beam 40 can restrain the heat exchange plate 30, thereby reducing the relative movement between the heat exchange plate 30 and the battery cells 20 and improving the uniformity of heat exchange. In addition, the first beam 40 distributes the force at the connection points between the heat exchange plate 30 and the frame 10, reducing the risk of the connection between the heat exchange plate 30 and the frame 10 becoming loose, improving the sealing of the battery 2, and increasing the reliability of the battery 2.

[0098] In some embodiments, channels are provided within the heat exchange plate 30 for the flow of a heat exchange medium. By way of example, the heat exchange medium may be a liquid or a gas, such as water.

[0099] In some embodiments, the battery 2 further includes a protective plate 50 that is installed on the side of the heat exchange plate 30 that faces away from the battery cells 20 .

[0100] The protection plate 50 may be a plate of uniform thickness or may be a plate of unequal thickness.

[0101] The material of the protective plate 50 may be metal, plastic, metal-plastic composite material or other material. Optionally, the metal may be aluminum, aluminum alloy, stainless steel, nickel-plated steel or other.

[0102] The protection plate 50 may be an integrally molded plate, or may be formed by splicing together a plurality of plates.

[0103] The protective plate 50 can protect the heat exchange plate 30, reduce the risk of external impurities directly impacting the heat exchange plate 30, reduce deformation of the heat exchange plate 30, improve the uniformity of heat exchange, reduce the risk of heat exchange medium leakage, and improve the reliability of the battery 2.

[0104] In some embodiments, the protection plate 50 is connected to the heat exchange plate 30. Illustratively, the protection plate 50 may be connected to the heat exchange plate 30 by adhesive bonding, fastener connection, welding, engagement, or other methods.

[0105] In some embodiments, the protective plate 50 is bonded to the heat exchange plate 30. By bonding the protective plate 50 to the heat exchange plate 30, the connection strength between the heat exchange plate 30 and the protective plate 50 can be improved, and the stability of the protective plate 50 can be improved.

[0106] In some embodiments, the protective plate 50 is adhered to the heat exchange plate 30 by a structural adhesive.

[0107] In some embodiments, the protective plate 50 and the heat exchange plate 30 are also connected by other members, such as fasteners.

[0108] In some embodiments, the thickness of the protection plate 50 may be 0.1 mm to 50 mm, and optionally, the thickness of the protection plate 50 is 0.4 mm to 5 mm.

[0109] As an example, the thickness of the protection plate 50 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.

[0110] In the present embodiment, the thickness of the protective plate 50 is limited to 0.1 mm or more, thereby improving the structural strength of the protective plate 50 and reducing deformation when the protective plate 50 is stepped on. In the present embodiment, the thickness of the protective plate 50 is limited to 50 mm or less, thereby reducing the weight and volume of the protective plate 50 and reducing loss of energy density of the battery 2.

[0111] In some embodiments, the battery 2 further includes a reinforcing beam 60 that is disposed on the side of the protective plate 50 that faces away from the heat exchange plate 30 and is fixed to the protective plate 50 .

[0112] The reinforcing beam 60 and the protective plate 50 may be independently molded components that can be fixedly connected by welding, adhesive, fasteners, or other methods. Alternatively, the reinforcing beam 60 and the protective plate 50 may also be integrally molded.

[0113] The reinforcing beam 60 may be one or more.

[0114] The reinforcing beam 60 can improve the strength of the entire battery 2, reduce deformation of the protective plate 50 when the protective plate 50 is subjected to external impact, reduce the risk of the protective plate 50 pressing against the heat exchange plate 30, and improve the reliability of the battery 2.

[0115] In some embodiments, the reinforcing beams 60 are used to connect to external components. The reinforcing beams 60 of the battery 2 provide attachment points to several components of an electrical device, thereby reducing parts, improving integration, and simplifying the assembly process.

[0116] In some embodiments, the reinforcement beam 60 is used to mount the vehicle seat 5. Embodiments of the present application can eliminate the need for a vehicle seat mounting beam, thereby saving vehicle parts, improving vehicle integration, and simplifying the vehicle assembly process.

[0117] In some embodiments, the reinforcing beam 60 is formed by bending a metal sheet.

[0118] In some embodiments, the battery 2 includes a plurality of reinforcing beams 60 .

[0119] In some embodiments, the battery 2 further includes a distribution board 70 including a casing 71 and an electrical device 72, the casing 71 being located on the side of the protective plate 50 away from the heat exchange plate 30, the casing 71 and the protective plate 50 defining an accommodating cavity, and the electrical device 72 being installed in the accommodating cavity and electrically connected to the battery cells 20.

[0120] The power distribution board 70 can control the battery 2. For example, the power distribution board 70 plays a role in protecting and distributing power transmission to the battery 2 during the charging and discharging process of the battery 2.

[0121] The switchboard 70 is installed on the side of the protective plate 50 that is away from the heat exchange plate 30, and the protective plate 50 and the heat exchange plate 30 protect the switchboard 70 in the event of thermal runaway in the battery cells 20, reducing the risk of high-temperature materials being emitted from the battery cells 20 damaging the electrical devices 72. The heat exchange plate 30 also exchanges heat with the switchboard 70 via the protective plate 50, thereby regulating the temperature of the switchboard 70. Installing the switchboard 70 outside the frame 10 further improves the utilization rate of the internal space of the battery 2.

[0122] Generally, the battery voltage is relatively high, and if the electrical components of the electrical device (e.g., motor controller, air conditioning system, and charging system) are directly connected to the battery, it will cause a disruption in the battery's wiring harness. Therefore, a distribution board must be added to distribute high voltage to the battery. The distribution board adopts a centralized power distribution method, has a compact structure design, a convenient wiring layout, and is easy and fast to inspect. According to the system architecture needs of different customers, the distribution board may also integrate intelligent control management units of some battery management systems, thereby further simplifying the complexity of power distribution for the entire electrical device.

[0123] In some embodiments, electrical device 72 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 .

[0124] 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 the 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 the measured current and convert the sensed information into an electrical signal or other required form of information 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, reduce the risk of battery overcharging and over-discharging, extend battery life, and monitor battery status.

[0125] Illustratively, the battery management assembly includes a circuit board.

[0126] In some embodiments, the power distribution board 70 is located directly below or behind the rear seats of the vehicle. By locating the power distribution board 70 below or behind the rear seats of the vehicle, significant space utilization can be achieved within the overall vehicle.

[0127] In some embodiments, the casing 71 of the switchboard 70 is secured to the protective plate 50 by welding.

[0128] In some embodiments, the casing 71 has a casing opening 711 at one end away from the protective plate 50, and the distribution board 70 further includes a cover plate 73 connected to the casing 71 to cover the casing opening 711.

[0129] The cover plate 73 serves to seal the casing 71, blocking external impurities from entering the casing 71 and reducing the risk of the electrical device 72 being corroded and damaged by the external impurities.

[0130] In some embodiments, the cover plate 73 is removably connected to the casing 71. If the electrical device 72 malfunctions, the cover plate 73 can be removed, thereby facilitating maintenance of the electrical device 72.

[0131] In some embodiments, the first opening 10b is located at the upper end of the receiving space 10a along the vertical direction, and the heat exchange plate 30 is located on the upper side of the frame 10.

[0132] For example, when the battery 2 is installed in an electrical device, the heat exchange plate 30 is positioned at the upper side of the receiving space 10a along the vertical direction. However, during the manufacturing, transportation, etc. of the battery 2, the heat exchange plate 30 is not required to be positioned at the upper side of the receiving space 10a along the vertical direction.

[0133] The heat exchange plate 30 is installed on the upper side of the frame 10, and when the underside of the battery 2 is subjected to an external impact, the impact force experienced by the heat exchange plate 30 is relatively small, thereby reducing the deformation of the heat exchange plate 30, improving the uniformity of heat exchange, reducing the risk of heat exchange medium leakage, and improving the reliability of the battery 2.

[0134] In some embodiments, the battery cells 20 are fixed to a heat exchange plate 30. The heat exchange plate 30 can simultaneously support the battery cells 20 and exchange heat with the battery cells 20. Fixing the battery cells 20 to the heat exchange plate 30 can further reduce relative movement between the battery cells 20 and the heat exchange plate 30 when the battery 2 is subjected to external impact, thereby improving the stability of heat exchange between the heat exchange plate 30 and the battery cells 20.

[0135] In some embodiments, the battery cells 20 are glued to the heat exchange plate 30. The glueing process is simple and highly stable.

[0136] In some embodiments, the battery cells 20 are bonded to the heat exchange plate 30 by a thermally conductive adhesive. The thermal resistance of the thermally conductive adhesive is relatively low, and by using the thermally conductive adhesive to bond the battery cells 20 to the heat exchange plate 30, the heat exchange efficiency between the heat exchange plate 30 and the battery cells 20 can be improved.

[0137] In some embodiments, an electrode terminal 23 is provided on the side of the battery cell 20 away from the heat exchange plate 30 .

[0138] The electrode terminals 23 are usually installed so as to protrude, and by installing the electrode terminals 23 on the side of the battery cell 20 away from the heat exchange plate 30, the risk of the bus members connected to the electrode terminals 23 interfering with the heat exchange plate 30 is reduced, the heat exchange area between the battery cell 20 and the heat exchange plate 30 is increased, and heat exchange efficiency can be improved.

[0139] In some embodiments, the two electrode terminals 23 are both installed on the side of the battery cell 20 that is away from the heat exchange plate 30 .

[0140] In some embodiments, the cell casing 211 includes a casing bottom wall 2111 facing the end cap 212, and the casing bottom wall 2111 is bonded to the heat exchange plate 30. Two electrode terminals 23 are attached to the end cap 212.

[0141] In some embodiments, a pressure release mechanism 24 is provided on the side of the battery cell 20 away from the heat exchange plate 30. If thermal runaway occurs in the battery cell 20, the high-temperature, high-pressure material released through the pressure release mechanism 24 will not directly impact the heat exchange plate 30, thereby reducing the risk of melting the heat exchange plate 30 and reducing leakage of the heat exchange medium.

[0142] 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 heat exchange plate 30 .

[0143] In some embodiments, the other end of the receiving space 10a has a second opening 10c. The battery 2 further includes a base plate 80 that covers the second opening 10c and is connected to the frame 10.

[0144] The base plate 80 and the heat exchange plate 30 can seal the accommodating space 10a from both sides, thereby improving the sealing performance of the battery 2.

[0145] In some embodiments, the battery 2 includes a case that includes a base plate 80 , a heat exchange plate 30 , and a frame 10 .

[0146] In some embodiments, the heat exchange plate 30 and the base plate 80 are located at the upper and lower vertical sides of the frame 10, respectively.

[0147] In some embodiments, the battery cells 20 are fixed to the heat exchange plate 30. The base plate 80 does not need to support the battery cells 20, thereby reducing the strength requirements for the base plate 80, thereby reducing the thickness and weight of the base plate 80 and improving the energy density of the battery 2.

[0148] In some embodiments, the frame 10 includes a second beam 11 and a third beam 12. The first beam 40, the second beam 11, and the third beam 12 all extend along a first direction X, and the second beam 11, the first beam 40, and the third beam 12 are spaced apart along a second direction Y. The first direction X intersects the second direction Y, and optionally, the first direction X is perpendicular to the second direction Y.

[0149] In some embodiments, in the second direction Y, the battery cell 20 is located between the second beam 11 and the first beam 40. The first beam 40 and the second beam 11 are used to restrict the battery cell 20 from both sides.

[0150] In some embodiments, the plurality of battery cells 20 are arranged along the second direction Y.

[0151] In some embodiments, the frame 10 further includes two fourth beams 13 arranged opposite each other along the first direction X, the fourth beams 13 extending along the second direction Y, and the fourth beams 13 connected to the second beam 11 and the third beam 12 respectively along both ends of the second direction Y.

[0152] The first beam 40 is connected to two fourth beams 13 along both ends in the first direction X, respectively.

[0153] In some embodiments, the heat exchange plate 30 is fixed to the second beam 11 , the third beam 12 and two fourth beams 13 .

[0154] In some embodiments, the battery 2 further includes a first connecting member 90 that secures the protective plate 50 , the heat exchange plate 30 and the frame 10 .

[0155] The first connecting member 90 simultaneously fixes the protection plate 50 and the heat exchange plate 30 to the frame 10, thereby improving the stability of the protection plate 50 and the heat exchange plate 30.

[0156] In some embodiments, the first connecting member 90 passes through the protection plate 50 and the heat exchange plate 30 and is fixed to the frame 10 .

[0157] In some embodiments, there are a plurality of first connecting members 90, and the plurality of first connecting members 90 are spaced apart along the circumferential direction of the frame 10.

[0158] In some embodiments, the first connecting member 90 may include a FDS (flow drill screw), a bolt, or other fastener.

[0159] In some embodiments, the battery 2 further includes a second connecting member 91 that secures the protective plate 50 , the heat exchange plate 30 and the first beam 40 .

[0160] The second connecting member 91 simultaneously fixes the protection plate 50 and the heat exchange plate 30 to the first beam 40, thereby improving the stability of the protection plate 50 and the heat exchange plate 30.

[0161] In some embodiments, the second connecting member 91 passes through the protection plate 50 and the heat exchange plate 30 and is fixed to the first beam 40 .

[0162] In some embodiments, the second connection members 91 are plural, and the plural second connection members 91 are arranged along the first direction X at intervals.

[0163] In some embodiments, the second connecting member 91 may include a FDS (flow drill screw), a bolt, or other fastener.

[0164] 6 is an enlarged schematic view of the circled area C in FIG. 5, FIG. 7 is a local cross-sectional schematic view along the EE direction in FIG. 6, FIG. 8 is a top view schematic view of a battery provided according to some embodiments of the present application, FIG. 9 is a cross-sectional schematic view along the FF direction in FIG. 8, and FIG. 10 is an enlarged schematic view of the circled area in FIG. 9.

[0165] 6 to 10, in some embodiments, the heat exchange plate 30 includes a flow passage area 30a in which flow passages 31 for a heat exchange medium to flow are provided, and a non-flow passage area 30b.

[0166] When the heat exchange medium passes through the flow passage 31, it comes into contact with the flow passage region 30a and exchanges heat.

[0167] In some embodiments, in the thickness direction Z of the heat exchange plate 30, at least a portion of the flow channel region 30a protrudes from the non-flow channel region 30b.

[0168] For example, the flow path region 30a can protrude from the non-flow path region 30b in a direction away from the battery cell 20 and can also protrude from the non-flow path region 30b in a direction towards the battery cell 20.

[0169] In some embodiments, the heat exchange plate 30 includes a first plate 32 and a second plate 33 that are stacked one on top of the other, the first plate 32 being connected to the battery cells 20, and the second plate 33 being located on the side of the first plate 32 that is away from the battery cells 20 and connected to the protective plate 50. The flow path 31 is formed between the first plate 32 and the second plate 33.

[0170] The first plate 32 and the second plate 33 can be molded independently, which allows for flexible configuration of the flow path 31, reduces the difficulty of molding the heat exchange plate 30, and improves the uniformity of heat exchange.

[0171] In some embodiments, the first plate 32 and the second plate 33 are welded together. The weld seam between the first plate 32 and the second plate 33 is circumferential to improve sealing.

[0172] In some embodiments, the stacking direction of the first plate 32 and the second plate 33 is parallel to the thickness direction Z of the heat exchanger plate 30. Optionally, the thickness direction Z of the heat exchanger plate 30 is parallel to the vertical direction, and the second plate 33 is located above the first plate 32.

[0173] In some embodiments, the first plate 32 is a flat plate. The surface of the first plate 32 is flat, which is convenient for placing the battery cells 20 thereon.

[0174] In some embodiments, a fourth recess 331 is provided on the side of the second plate 33 facing the first plate 32, and the first plate 32 covers the fourth recess 331 to form the flow channel 31.

[0175] In some embodiments, the second plate 33 has a fourth protrusion 332 formed at a position corresponding to the fourth recess 331, and the fourth protrusion 332 protrudes away from the first plate 32. By providing the fourth protrusion 332, the depth of the fourth recess 331 is increased, which increases the current passing area of ​​the flow path 31. In addition, the effect of the fourth recess 331 on the strength of the second plate 33 is reduced, thereby improving the reliability of the second plate 33.

[0176] In some embodiments, the shapes of the fourth protrusion 332 and the fourth recess 331 correspond to each other.

[0177] In some embodiments, the fourth protrusion 332 and the fourth recess 331 can be formed by stamping the second plate 33 .

[0178] In some embodiments, the heat exchange plate 30 further includes an inlet and an outlet (not shown), and the flow passage 31 communicates with the inlet and the outlet. The heat exchange medium can flow into the flow passage 31 through the inlet and out through the outlet.

[0179] In some embodiments, the inlet may be located on the first plate 32 and the second plate 33. The outlet may be located on the first plate 32 and the second plate 33.

[0180] In some embodiments, the protective plate 50 is secured to the non-flow-path region 30b. Illustratively, the protective plate 50 is secured to the non-flow-path region 30b by adhesive, welding, fastening, or other methods.

[0181] The non-flow path region 30b does not have a flow path 31 installed, and by fixing the protective plate 50 to the non-flow path region 30b, when the protective plate 50 is subjected to an impact, the force transmitted to the flow path region 30a can be reduced, and deformation of the flow path 31 can be reduced.

[0182] In some embodiments, the first connecting member 90 penetrates the first plate 32 and the second plate 33. The second connecting member 91 penetrates the first plate 32 and the second plate 33.

[0183] In some embodiments, the second connecting member 91 passes through the protection plate 50 , the second plate 33 , and the first plate 32 and is fixed to the first beam 40 .

[0184] In some embodiments, the non-flow path region 30b includes a portion where the first plate 32 and the second plate 33 are bonded to each other. The flow path region 30a includes the fourth protrusion 332 of the second plate 33 and a portion of the first plate 32 that corresponds to the fourth protrusion 332 in the thickness direction Z.

[0185] In some embodiments, the projection of the flow channel region 30 a in the thickness direction Z is located within the projection of the protection plate 50 .

[0186] The protective plate 50 can protect the flow path region 30a from above so as to reduce the impact force that the flow path region 30a receives from above, reduce deformation of the flow path region 30a, improve the uniformity of heat exchange, reduce the risk of the flow path region 30a bursting, and improve the reliability of the battery 2.

[0187] In some embodiments, the flow path region 30a and the protective plate 50 are spaced apart in the thickness direction Z.

[0188] When the protective plate 50 is subjected to pressure, it may deform. Installing the flow path area 30a and the protective plate 50 with a gap between them provides space for the protective plate 50 to deform, thereby reducing the risk of the protective plate 50 directly pressing against the flow path area 30a.

[0189] In some embodiments, in the thickness direction Z, the projection of the heat exchange plate 30 is located within the projection of the protection plate 50. The protection plate 50 can completely cover the heat exchange plate 30, thereby protecting the heat exchange plate 30 and reducing the impact that the heat exchange plate 30 receives.

[0190] In some embodiments, a portion of the non-channel region 30b is fixed to the frame 10 and the first beam 40. No channels 31 are formed in the non-channel region 30b, and by fixing the portion of the non-channel region 30b to the frame 10 and the first beam 40, when the battery 2 is subjected to an external impact, the force transmitted to the channel region 30a is reduced, deformation of the channels 31 is reduced, the uniformity of heat exchange is improved, and the risk of damage to the channel region 30a and leakage of the heat exchange medium is reduced.

[0191] In some embodiments, at least one of the flow channel region 30a and the non-flow channel region 30b is adhered to the protective plate 50. In this embodiment, only the flow channel region 30a may be adhered to the protective plate 50, only the non-flow channel region 30b may be adhered to the protective plate 50, or both the flow channel region 30a and the non-flow channel region 30b may be adhered to the protective plate 50 at the same time.

[0192] By bonding the flow path region 30a or the non-flow path region 30b to the protective plate 50, the connection strength between the heat exchange plate 30 and the protective plate 50 can be improved, and the stability of the battery 2 can be improved.

[0193] In some embodiments, a structural adhesive is provided between the flow path region 30a and the protective plate 50. The structural adhesive is relatively soft, and when the protective plate 50 is subjected to pressure, the structural adhesive can deform to provide space for deformation of the protective plate 50, thereby reducing the force transmitted to the flow path region 30a.

[0194] 11 is an enlarged schematic view of the circled area D in FIG. 5, FIG. 12 is a schematic bottom view of a protective plate of a battery provided by some embodiments of the present application, FIG. 13 is a schematic top view of a protective plate, heat exchange plate and casing of a battery provided by some embodiments of the present application, FIG. 14 is a schematic local cross-sectional view along the GG direction in FIG. 13, FIG. 15 is an enlarged schematic view of the blocked area in FIG. 14, and FIG. 16 is an enlarged schematic view of the circled area in FIG. 8.

[0195] 5 and 10 to 16, in some embodiments, a first recess 51 is provided on the side of the protective plate 50 facing the heat exchanger plate 30. In the thickness direction Z of the heat exchanger plate 30, the projection of the flow path region 30a along the thickness direction Z is located within the projection of the first recess 51.

[0196] By installing the first recess 51, the flow path region 30a can be avoided, the distance between the bottom surface 511 of the first recess and the flow path region 30a can be increased, and the risk of the protective plate 50 directly pressing against the flow path region 30a can be reduced.

[0197] In some embodiments, the protective plate 50 includes an edge 52 that is arranged to surround the first recess 51, the edge 52 abuts the non-flow path area 30b, and the edge 52, the non-flow path area 30b and the frame 10 are fixedly connected.

[0198] The edge portion 52 is located on the outer periphery of the protective plate 50, and by fixing the edge portion 52 to the non-flow path region 30b and the frame 10, the stability of the protective plate 50 can be improved. The edge portion 52 abuts against the non-flow path region 30b and can also seal the first recess 51.

[0199] In some embodiments, the first connecting member 90 is connected to the edge 52, the non-channel region 30b, and the frame 10.

[0200] In some embodiments, the flow path region 30a protrudes from the surface of the non-flow path region 30b facing the protective plate 50, and a portion of the flow path region 30a is accommodated in the first recess 51. The first recess 51 provides space for the flow path region 30a away from the flow path region 30a, thereby improving space utilization.

[0201] In some embodiments, a structural adhesive is disposed in the first recess 51, and the structural adhesive bonds the flow path region 30a and the protective plate 50. By bonding the flow path region 30a and the protective plate 50, the structural adhesive can improve the connection strength between the flow path region 30a and the protective plate 50 and improve the stability of the battery 2. The first recess 51 can limit the position of the structural adhesive and reduce spillage of the structural adhesive.

[0202] In some embodiments, the bottom surface 511 of the first recess and the flow path region 30a are spaced apart in the thickness direction Z.

[0203] When the protective plate 50 is subjected to pressure, it may deform, and placing a gap between the flow path area 30a and the bottom surface 511 of the first recess provides space for the protective plate 50 to deform, thereby reducing the risk of the protective plate 50 directly pressing against the flow path area 30a.

[0204] In some embodiments, the protective plate 50 further includes a first protrusion 53 protruding from the bottom surface 511 of the first recess, the first protrusion 53 abutting the non-flow path region 30b, and the first protrusion 53, the non-flow path region 30b and the first beam 40 are fixedly connected.

[0205] The first protrusion 53 may have a solid structure or a hollow structure.

[0206] The number of first protrusions 53 may be one or more.

[0207] The first protrusion 53 may be connected to the side surface of the first recess 51 or may be provided at a distance from the side surface of the first recess 51 .

[0208] The first protrusion 53 can compensate for the gap between the bottom surface 511 of the first recess and the non-flow path region 30b, thereby abutting against the non-flow path region 30b, and further realizing a fixed connection between the first protrusion 53, the non-flow path region 30b and the first beam 40, thereby improving the strength of the battery 2.

[0209] In some embodiments, the top surface 531 of the first protrusion is flush with the surface of the edge 52 facing the non-channel region 30b.

[0210] In some embodiments, the protective plate 50 further includes a second protrusion 54 protruding from a surface of the edge 52 that is separated from the non-flow path region 30b, and the first recess 51 is formed at a position corresponding to the second protrusion 54 of the protective plate 50. By providing the second protrusion 54, the depth of the first recess 51 can be increased, and the strength of the protective plate 50 can be improved.

[0211] Illustratively, the shapes of the second protrusions 54 and the first recesses 51 correspond to each other.

[0212] In some embodiments, the first protrusion 53 is connected to the second protrusion 54. Illustratively, the protruding directions of the first protrusion 53 and the second protrusion 54 are opposite: the first protrusion 53 protrudes toward the heat exchange plate 30, and the second protrusion 54 protrudes away from the heat exchange plate 30.

[0213] By providing the first protrusions 53 and the second protrusions 54, the structural strength of the protection plate 50 can be further improved and deformation of the protection plate 50 can be reduced.

[0214] In some embodiments, the protective plate 50 further has a second recess 55 recessed from the surface of the protective plate 50 facing away from the heat exchange plate 30, and the second recess 55 is formed at a position corresponding to the first protrusion 53 of the protective plate 50.

[0215] By providing the second recess 55, the molding process of the protective plate 50 can be simplified, the weight of the protective plate 50 can be reduced, and the difficulty of connecting the first protrusion 53 and the non-flow path area 30b can be reduced.

[0216] Illustratively, the shapes of the first protrusion 53 and the second recess 55 correspond to each other.

[0217] In some embodiments, the minimum depth h1 of the second recesses 55 is between 0.1 mm and 50 mm in the thickness direction Z of the heat exchanger plate 30. Optionally, the minimum depth h1 of the second recesses 55 is between 1 mm and 5 mm.

[0218] In the embodiment of the present application, h1 is limited to 0.1 mm or more, thereby improving the structural strength of the protection plate 50. h1 is limited to 50 mm or less, thereby reducing the dimension of the protection plate 50 in the thickness direction Z and improving space utilization.

[0219] In some embodiments, a portion of the second connecting member 91 is accommodated in the second recess 55. The second recess 55 further provides an accommodation space 10a for the second connecting member 91, which can improve space utilization.

[0220] In some embodiments, the portion of the second connecting member 91 located outside the protective plate 50 in the direction away from the heat exchanger plate 30 does not exceed the upper surface 541 of the second protrusion. The embodiments of the present application can reduce the extra space occupied by the second connecting member 91 in the thickness direction Z, thereby improving space utilization.

[0221] In some embodiments, colloid is further filled into the second recess 55. The colloid can fill the remaining space of the second recess 55 and improve the flatness of the appearance of the protection plate 50.

[0222] In some embodiments, the protective plate 50 may be formed according to the following steps: providing a flat plate structure, stamping one side of the flat plate structure to form a first recess 51 and a second protrusion 54 at the stamping position, and then stamping again on the upper surface 541 of the second protrusion, thereby forming a first protrusion 53 and a second recess 55 at the stamping position.

[0223] In some embodiments, the casing 71 has an end surface 712 at one end facing the protective plate 50, and the end surface 712 abuts against the protective plate 50. In the thickness direction Z, the projection of the end surface 712 and the projection of the second recess 55 do not overlap.

[0224] For example, the end surface 712 of the casing 71 abuts against the upper surface 541 of the second protrusion.

[0225] The embodiment of the present application is installed to avoid the end face 712 of the casing 71 and the second recess 55, thereby reducing the risk of the second recess 55 communicating with the space inside and outside the casing 71 and improving the sealing performance and reliability of the distribution board 70.

[0226] In some embodiments, the first beam 40 extends along a first direction X, and the protective plate 50 is provided with a plurality of second recesses 55 spaced apart along the first direction X.

[0227] By providing multiple second recesses 55, multiple locations on the protective plate 50 that can be connected to the non-flow path region 30b can be provided, thereby improving the connection strength between the protective plate 50, the non-flow path region 30b, and the first beam 40.

[0228] In some embodiments, a portion of the end surface 712 is fixed to a portion of the apron 50 between two adjacent second recesses 55 .

[0229] In the embodiment of the present application, by fixing the casing 71 using the portion between the second recesses 55, not only can the second recesses 55 and the end face 712 of the casing 71 be avoided, but also space utilization can be improved.

[0230] In some embodiments, the minimum distance L1 between adjacent second recesses 55 in the first direction X is between 1 mm and 200 mm. Optionally, L1 is between 20 mm and 100 mm.

[0231] In the present embodiment, L1 is limited to 1 mm or more, so that the connection area between the casing 71 and the protective plate 50 meets the requirements and improves the sealing performance of the casing 71. In the present embodiment, L1 is limited to 200 mm or less, so that sufficient space is secured for the second recess 55 and more areas are provided for the connection between the protective plate 50 and the non-flow-path region 30b.

[0232] In some embodiments, there are a plurality of first protrusions 53, and the plurality of first protrusions 53 are arranged at intervals along the first direction X. The first protrusions 53 and the second recesses 55 are arranged in one-to-one correspondence.

[0233] In some embodiments, the projection of the at least one second recess 55 in the thickness direction Z is located within the projection of the space enclosed by the casing 71 .

[0234] In some embodiments, the two second recesses 55 are disposed on both sides of the casing 71 along the first direction X, respectively.

[0235] In some embodiments, the second recesses 55 are provided corresponding to a plurality of second connecting members 91. Illustratively, the second connecting members 91 are FDSs, which penetrate the protective plate 50 and the heat exchange plate 30 and are screw-connected to the first beam 40.

[0236] 17 is a schematic local cross-sectional view taken along the HH direction in FIG. 13, FIG. 18 is an enlarged schematic view of the circled area in FIG. 17, and FIG. 19 is an enlarged schematic view of the circled area B in FIG.

[0237] 2, 12, 13, and 17 to 19, in some embodiments, the protective plate 50 further includes a third protrusion 56 protruding from the bottom surface 511 of the first recess, the third protrusion 56 abuts the non-flow path region 30b, and the third protrusion 56, the non-flow path region 30b, and the frame 10 are fixedly connected.

[0238] The third protrusion 56 may have a solid structure or a hollow structure.

[0239] The number of third protrusions 56 may be one or more.

[0240] The third protrusion 56 may be connected to the side surface of the first recess 51 or may be provided at a distance from the side surface of the first recess 51 .

[0241] The third protrusion 56 can compensate for the gap between the bottom surface 511 of the first recess and the non-flow path region 30b, thereby abutting against the non-flow path region 30b, and further realizing a fixed connection between the third protrusion 56, the non-flow path region 30b and the frame 10, thereby improving the strength of the battery 2.

[0242] In some embodiments, the protective plate 50 includes a plurality of third protrusions 56 spaced apart along the first direction X. By providing the plurality of third protrusions 56, the protective plate 50 is provided with a plurality of locations that can be connected to the non-flow path region 30b, thereby improving the connection strength between the protective plate 50, the non-flow path region 30b, and the frame.

[0243] In some embodiments, in the first direction X, a portion of the flow path region 30 a is located between two adjacent third protrusions 56 .

[0244] In the embodiment of the present application, the space between the third protrusions 56 is utilized to improve the space utilization rate, on the premise that the third protrusions 56 and the flow path region 30a are avoided.

[0245] In some embodiments, there are at least three third protrusions 56. The three third protrusions 56 are defined as a first third protrusion 56, a second third protrusion 56, and a third third protrusion 56 in order along the first direction X, with a portion of the flow path region 30a being located between the first third protrusion 56 and the second third protrusion 56 and communicating with the inlet, and another portion of the flow path region 30a being located between the second third protrusion 56 and the third third protrusion 56 and communicating with the outlet.

[0246] In some embodiments, the protective plate 50 further includes a third recess 57 recessed from the surface of the protective plate 50 facing away from the heat exchange plate 30, and the third recess 57 is formed at a position corresponding to the third protrusion 56 of the protective plate 50.

[0247] By providing the third recess 57, the molding process of the protective plate 50 can be simplified, the weight of the protective plate 50 can be reduced, and the difficulty of connecting the third protrusion 56 and the non-flow path area 30b can be reduced.

[0248] For example, the third protrusion 56 and the third recess 57 have corresponding shapes.

[0249] In some embodiments, the minimum depth h2 of the third recess 57 is between 0.1 mm and 50 mm in the thickness direction Z. Optionally, the minimum depth h2 of the third recess 57 is between 1 mm and 5 mm.

[0250] In some embodiments, the minimum distance L2 between adjacent third recesses 57 in the first direction X is between 1 mm and 200 mm. Optionally, L2 is between 20 mm and 100 mm.

[0251] In some embodiments, at least one first connecting member 90 is connected to the third protrusion 56, the non-flow-path region 30b, and the frame 10.

[0252] In some embodiments, a portion of the first connecting member 90 is accommodated in the third recess 57. The third recess 57 further provides an accommodating space 10a for the first connecting member 90, which can improve space utilization.

[0253] In some embodiments, the portion of the first connecting member 90 located outside the protective plate 50 in the direction away from the heat exchanger plate 30 does not exceed the upper surface 541 of the second protrusion. The embodiments of the present application can reduce the extra space occupied by the first connecting member 90 in the thickness direction Z and improve space utilization.

[0254] In some embodiments, colloid is further filled into the third recess 57. The colloid can fill the remaining space of the third recess 57 and improve the flatness of the appearance of the protection plate 50.

[0255] In some embodiments, the protective plate 50 may be formed according to the following steps: providing a flat plate structure, stamping one side of the flat plate structure to form a first recess 51 and a second protrusion 54 at the stamping position, and stamping again on the upper surface 541 of the second protrusion, thereby forming a first protrusion 53, a second recess 55, a third protrusion 56 and a third recess 57 at the stamping position.

[0256] In some embodiments, the frame 10 includes a second beam 11 and a third beam 12 that are disposed opposite each other along a second direction Y, and the first beam 40, the second beam 11, and the third beam 12 all extend along a first direction X that is perpendicular to the second direction Y. In the second direction Y, the battery cells 20 are located between the second beam 11 and the first beam 40.

[0257] In some embodiments, the third protrusion 56, the non-flow passage area 30b and the second beam 11 are fixedly connected to improve the structural strength of the battery 2 and reduce the risk of the connection between the heat exchange plate 30 and the frame 10 failing.

[0258] In some embodiments, some of the first connecting members 90 fixedly connect the edge 52, the non-flow channel region 30b, and the second beam 11, and some of the other first connecting members 90 fixedly connect the third protrusion 56, the non-flow channel region 30b, and the second beam 11.

[0259] In some embodiments, with reference to FIGS. 4 and 19, the smallest dimension W1 of the second beam 11 is greater than the smallest dimension W2 of the third beam 12 in the second direction Y.

[0260] The second beam 11 has a relatively large size and strength, and can not only withstand the expansion force of the battery cell 20, but also be fixedly connected to the third protrusion 56 and the edge 52 at the same time, thereby improving the structural strength of the entire battery 2.

[0261] FIG. 20 is a schematic diagram of an electrical device provided in accordance with some other embodiments of the present application.

[0262] 20, 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.

[0263] In some embodiments, the electrical device is a vehicle, and the heat exchange plate 30 can be embedded inside the vehicle, thereby reducing the risk of the heat exchange plate 30 being subjected to external impacts.

[0264] In some embodiments, the protective plate 50 is at least a part of the vehicle floor. Using the protective plate 50 of the battery 2 as the floor can save vehicle parts, improve vehicle integration, and simplify the vehicle assembly process. The protective plate 50 can withstand being stepped on by passengers, reduce deformation of the flow path 31, and improve the uniformity of heat exchange.

[0265] In some embodiments, the vehicle includes a seat 5 connected to a protective plate 50. The protective plate 50 can support the seat 5 and improve the space utilization of the entire vehicle.

[0266] In some embodiments, the sheet 5 is attached to a reinforcing beam 60 .

[0267] 2 to 19, an embodiment of the present application provides a battery 2 including a frame 10, a battery cell 20, a heat exchange plate 30, a protective plate 50, a first beam 40, a distribution board 70, a reinforcing beam 60, and a base plate 80.

[0268] The frame 10 surrounds and forms an accommodation space 10a, and the battery cells 20 are installed in the accommodation space 10a. A first opening 10b and a second opening 10c are formed on the upper and lower sides of the accommodation space 10a along the vertical direction, respectively. A heat exchange plate 30 is fixed to the frame 10 to cover the first opening 10b and is used for heat exchange with the battery cells 20. A base plate 80 covers the second opening 10c and is connected to the frame 10.

[0269] The first beam 40 is installed in the accommodation space 10a, and both ends of the first beam 40 are connected to the frame 10. The protective plate 50 is installed on the side of the heat exchanger plate 30 that is away from the battery cells 20 and fixed to the heat exchanger plate 30. The reinforcing beam 60 is installed on the side of the protective plate 50 that is away from the heat exchanger plate 30 and fixed to the protective plate 50, and the reinforcing beam 60 is used to attach a vehicle seat 5.

[0270] The distribution board 70 includes a casing 71 and an electrical device 72. The casing 71 is located on the side of the protective plate 50 away from the heat exchange plate 30. The casing 71 and the protective plate 50 define an accommodating cavity. The electrical device 72 is installed in the accommodating cavity and electrically connected to the battery cell 20.

[0271] The heat exchange plate 30 includes a flow path region 30a in which a flow path 31 for the heat exchange medium to flow is provided, and a non-flow path region 30b, and the flow path region 30a protrudes from the side of the non-flow path region 30b facing the protective plate 50.

[0272] A first recess 51 is provided on the side of the protective plate 50 facing the heat exchanger plate 30. The protective plate 50 includes an edge 52 that is installed to surround the first recess 51, the edge 52 abutting the non-flow path region 30b, and the edge 52, the non-flow path region 30b, and the frame 10 are fixedly connected to each other.

[0273] The protective plate 50 further includes a first protrusion 53 protruding from the bottom surface 511 of the first recess, the first protrusion 53 abutting the non-flow path region 30b, and the first protrusion 53, the non-flow path region 30b and the first beam 40 are fixedly connected.

[0274] The protective plate 50 further includes a second protrusion 54 protruding from a surface of the edge 52 that is separated from the non-flow path region 30b, and the first recess 51 is formed at a position of the protective plate 50 corresponding to the second protrusion 54.

[0275] The protective plate 50 is further provided with a second recess 55 recessed from the surface of the protective plate 50 that faces away from the heat exchange plate 30, and the second recess 55 is formed at a position corresponding to the first protrusion 53 of the protective plate 50.

[0276] The protective plate 50 further includes a third protrusion 56 protruding from the bottom surface 511 of the first recess, the third protrusion 56 abutting the non-flow path region 30b, and the third protrusion 56, the non-flow path region 30b and the frame 10 are fixedly connected.

[0277] The protective plate 50 is further provided with a third recess 57 recessed from the surface of the protective plate 50 that faces away from the heat exchange plate 30, and the third recess 57 is formed at a position corresponding to the third protrusion 56 of the protective plate 50.

[0278] 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.

[0279] 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 frame that surrounds the housing to form a housing space, and one end of the housing space has a first opening; a battery cell installed in the accommodation space; a first beam disposed in the accommodating space, used to restrict expansion of the battery cell, and connected at both ends to the frame; a heat exchange plate that covers the first opening, is used for heat exchange with the battery cell, and is fixedly connected to the frame and the first beam; battery.

2. The heat exchange plate includes a flow path region in which a flow path for a heat exchange medium to flow is provided, and a non-flow path region, the non-flow path region is fixed to the frame and the first beam; The battery of claim 1 .

3. a protection plate disposed on a side of the heat exchange plate away from the battery cells and connected to the heat exchange plate; The battery according to claim 1 or 2.

4. a first recess is provided on a side of the protection plate facing the heat exchange plate; The heat exchange plate includes a flow path region in which a flow path for a heat exchange medium to flow is provided, and a non-flow path region, a projection of the flow path region along the thickness direction of the heat exchanger plate is located within a projection of the first recess, the protective plate includes an edge portion that is installed to surround the first recess, the edge portion abuts the non-flow path region, and the edge portion, the non-flow path region, and the frame are fixedly connected together; The battery of claim 3.

5. a bottom surface of the first recess and the flow path region are spaced apart in the thickness direction; The battery of claim 4.

6. the protection plate further includes a first protrusion protruding from a bottom surface of the first recess, the first protrusion abutting the non-flow path region, and the first protrusion, the non-flow path region, and the first beam are fixedly connected. The battery according to claim 4 or 5.

7. the protective plate further includes a second protrusion protruding from a surface of the edge portion that is separated from the non-flow path region, and the first recess is formed at a position of the protective plate corresponding to the second protrusion; The first protrusion is connected to the second protrusion. The battery of claim 6.

8. the protective plate is further provided with a second recess recessed from a surface of the protective plate that is away from the heat exchange plate, and the second recess is formed at a position corresponding to the first protrusion of the protective plate. The battery according to claim 6 or 7.

9. The battery further includes a power distribution board including a casing and an electric device, the casing being located on a side of the protective plate away from the heat exchange plate, the casing and the protective plate defining an accommodating cavity, the electric device being installed in the accommodating cavity and electrically connected to the battery cells; the casing has an end face at one end facing the protective plate, the end face abutting against the protective plate, and a projection of the end face and a projection of the second recess do not overlap in the thickness direction; The battery of claim 8.

10. the first beam extends along a first direction, and the protection plate is provided with a plurality of the second recesses spaced apart along the first direction; a portion of the end surface is fixed to a portion of the protection plate located between two adjacent second recesses; 10. The battery of claim 9.

11. the protective plate further includes a third protrusion protruding from a bottom surface of the first recess, the third protrusion abutting the non-flow path region, and the third protrusion, the non-flow path region, and the frame are fixedly connected together. The battery according to any one of claims 4 to 10.

12. the protection plate includes a plurality of third protrusions spaced apart along a first direction; In the first direction, a part of the flow path region is located between two adjacent third protrusions. The battery of claim 11.

13. the frame includes a second beam and a third beam that are disposed opposite each other along a second direction, and the first beam, the second beam, and the third beam all extend along a first direction that is perpendicular to the second direction; In the second direction, the battery cell is located between a second beam and the first beam; the third protrusion, the non-flow path region, and the second beam are fixedly connected; 13. The battery of claim 11 or 12.

14. In the second direction, a minimum dimension of the second beam is greater than a minimum dimension of the third beam.

14. The battery of claim 13.

15. The heat exchanger further includes a first connecting member that fixes the protective plate, the heat exchanger plate, and the frame, and a second connecting member that fixes the protective plate, the heat exchanger plate, and the first beam. The battery according to any one of claims 3 to 14.

16. The heat exchanger further includes a reinforcing beam disposed on a side of the protective plate away from the heat exchanger plate and fixed to the protective plate. The battery according to any one of claims 3 to 15.

17. The reinforcing beam is used to mount a seat in a vehicle.

17. The battery of claim 16.

18. The heat exchange plate includes a flow path region in which a flow path for a heat exchange medium to flow is provided, and a non-flow path region, At least one of the flow path region and the non-flow path region is adhered to the protection plate. The battery according to any one of claims 3 to 17.

19. The first opening is located at an upper end of the accommodation space along a vertical direction, and the heat exchange plate is located above the frame. The battery according to any one of claims 1 to 18.

20. The battery cells are fixed to the heat exchange plate. The battery according to any one of claims 1 to 19.

21. The other end of the storage space has a second opening, the battery further includes a base plate covering the second opening and connected to the frame. The battery according to any one of claims 1 to 20.

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

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