Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a battery monomer, a box body, a heat exchange piece and a reinforcing piece, the battery monomers are accommodated in the box body, the box body comprises a mounting plate, the mounting plate comprises a heat exchange area and a non-heat exchange area, and by taking the arrangement direction of the battery monomers and the mounting plate as the projection direction, at least part of the projection of the heat exchange area and at least part of the projection of the non-heat exchange area are located in the projection of the battery monomers; the heat exchange piece is mounted in the heat exchange area; the reinforcing piece is installed in the non-heat-exchange area. The reinforcing part is arranged in the non-heat-exchange area at the bottom of the battery monomer, and the mounting plate and the reinforcing part are arranged in the non-heat-exchange area of the mounting plate, so that compared with the structure that only the mounting plate is arranged at the bottom of the battery monomer, the bottom ball performance of the non-heat-exchange area is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device and an electric device. Background Art

[0002] In the related art, the box strength of the battery device is relatively low, and there is a risk that the bottom ball performance does not meet the standards, which needs to be improved. Utility Model Content

[0003] The present application provides a battery device and an electrical device to improve the bottom ball performance of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, including:

[0005] Battery cells;

[0006] A box body, wherein the battery cell is accommodated in the box body, the box body includes a mounting plate, the mounting plate includes a heat exchange area and a non-heat exchange area, and with the arrangement direction of the battery cell and the mounting plate as a projection direction, at least part of the heat exchange area and at least part of the non-heat exchange area are located in the projection of the battery cell;

[0007] A heat exchange element installed in the heat exchange area;

[0008] The reinforcing member is installed in the non-heat exchange area.

[0009] In the above technical solution, by arranging a reinforcement part in the non-heat exchange area, the non-heat exchange area of ​​the mounting plate has a two-layer structure including the mounting plate and the reinforcement part. Compared with the single-layer structure of only the mounting plate at the bottom of the battery cell, the bottom ball performance of the non-heat exchange area is improved.

[0010] In some embodiments, the heat exchange area is recessed toward the outside of the box body to form a first groove, and the non-heat exchange area forms a second groove on the side of the mounting plate away from the battery cell, at least a portion of the heat exchange component is installed in the first groove, and the projection of the second groove along the first direction falls within the projection of the reinforcement component along the first direction.

[0011] In some embodiments, a side of the heat exchange element facing the battery cell is flush with a side of the non-heat exchange area facing the battery cell.

[0012] In some embodiments, the reinforcing member covers the second groove.

[0013] In some embodiments, at least a portion of the reinforcing member is connected to the groove top of the second groove, and at least a portion of the reinforcing member is spaced apart from the groove bottom of the second groove.

[0014] In some embodiments, the reinforcing piece is provided with a protrusion protruding toward the second groove, and the protrusion is located in the second groove.

[0015] In some embodiments, the reinforcement piece is provided with reinforcing ribs.

[0016] In some embodiments, the reinforcing piece includes a plurality of sub-portions, the second groove includes a plurality of sub-areas, and projections of the plurality of sub-areas along the first direction fall within a union of projections of the plurality of sub-portions along the first direction.

[0017] In some embodiments, the reinforcing member is a rubber plate, and the rubber plate is disposed in the second groove.

[0018] In some embodiments, the tensile strength Rm of the mounting plate satisfies: Rm≥900Mpa.

[0019] In some embodiments, the tensile strength Rm of the mounting plate satisfies: 2000Mpa≥Rm≥1300Mpa.

[0020] In some embodiments, the heat exchange component is disposed on a side of the mounting plate facing the battery cell, and the reinforcing component is disposed on a side of the mounting plate facing away from the battery cell.

[0021] In a second aspect, an embodiment of the present application provides an electrical device, comprising: a battery device as described in any one of the above, wherein the battery device is used to store or provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of an energy storage system provided in some embodiments of the present application;

[0024] Figure 2 A schematic diagram of the structure of a charging network provided in some embodiments of the present application;

[0025] Figure 3 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0026] Figure 4 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0027] Figure 5One of the structural schematic diagrams of the battery device provided in some embodiments of the present application;

[0028] Figure 6 The second structural schematic diagram of the battery device provided in some embodiments of the present application;

[0029] Figure 7 The third structural schematic diagram of the battery device provided in some embodiments of the present application.

[0030] Reference numerals:

[0031] Energy storage device 1, power conversion device 2, power generation equipment 3, charging pile 4, connector 5;

[0032] Vehicles 1000;

[0033] Battery device 100;

[0034] Box body 10, first box body 11, second box body 12, mounting plate 13, heat exchange area 131, first groove 132, non-heat exchange area 133, sub-area 1331, second groove 134, heat exchange member 14, reinforcing member 15, protrusion 151, sub-portion 152;

[0035] Battery cell 20;

[0036] Controller 200; Motor 300. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0039] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0042] The term "multiple" as used in the present application refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple sheets" refers to more than two sheets (including two sheets).

[0043] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0044] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0045] The battery cell can be cylindrical, flat, rectangular or other shapes, and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the present application embodiment does not limit this.

[0046] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode collector includes a positive electrode collector body and a positive electrode ear. The positive electrode active material layer is coated on the surface of the positive electrode collector body. The positive electrode ear is not coated with the positive electrode active material layer and protrudes from the positive electrode collector body. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode collector includes a negative electrode collector body and a negative electrode ear. The negative electrode active material layer is coated on the surface of the negative electrode collector body. The negative electrode ear is not coated with the negative electrode active material layer and protrudes from the negative electrode collector body. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current is passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0047] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0048] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery cells are used to store or provide electrical energy.

[0049] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0050] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0051] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0052] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0053] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0054] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0055] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0056] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0057] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0058] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery devices are used to store or provide electrical energy.

[0059] The inventors found that the box strength of the battery device is low, and there is a risk that the bottom ball performance does not meet the standards, which affects the performance and service life of the battery device, resulting in major safety hazards during the use of the battery, and may even be detrimental to the safety of consumers. Improvements are needed.

[0060] Based on the above considerations, in order to improve the bottom ball performance of the battery device, the inventors have designed a battery device after in-depth research, including: a battery cell, a box, a heat exchanger and a reinforcement member; the battery cell is stored in the box, the box includes a mounting plate, the mounting plate includes a heat exchange area and a non-heat exchange area, with the arrangement direction of the battery cell and the mounting plate as the projection direction, at least part of the heat exchange area and at least part of the non-heat exchange area are located in the projection of the battery cell; the heat exchanger is arranged on the side of the mounting plate facing the battery cell and is installed in the heat exchange area; the reinforcement member is arranged on the side of the mounting plate away from the battery cell and is installed in the non-heat exchange area.

[0061] In a battery device of this structure, a reinforcement is provided in the non-heat exchange area, and the non-heat exchange area has a two-layer structure including a mounting plate and a reinforcement. Compared with the single-layer structure with only a mounting plate at the bottom of the battery cell, the bottom ball performance of the non-heat exchange area is improved.

[0062] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0063] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption and provide electrical energy to relevant users or electrical devices during peak electricity consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0064] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0065] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0066] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0067] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0068] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (SBMU), a fusion switch and other modules.

[0069] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module and other modules.

[0070] As an example, the fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0071] As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0072] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0073] In some embodiments, Figure 1 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter 2 (Power Converter System, PCS for short), and the power converter 2 is used to be connected between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electric energy, and the electric energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. Among them, the specific type of the power generation device 3 is not limited in this application.

[0074] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage systems, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0075] Please refer to Figure 2 The embodiment of the present application provides a charging network, including a charging pile 4 and an energy storage device 1, wherein the charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electric energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device in the energy storage device 1 through a cable, and the battery device can provide its stored electric energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to an electric device (such as a vehicle) so as to replenish energy to the electric device.

[0076] The energy storage device can be located inside the charging pile (such as an integrated storage and charging machine) or outside the charging pile.

[0077] The embodiment of the present application provides an electric device using a battery cell or a battery device or an energy storage device or an energy storage system as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, and a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0078] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0079] Please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 may be provided at the bottom, head or tail of the vehicle. The battery device 100 may be used to power the vehicle, for example, the battery device 100 may be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and operating power requirements of the vehicle during driving.

[0080] In some embodiments of the present application, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0081] Please refer to Figure 4 , Figure 4 The structural exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a plurality of battery cells 20, and the battery cells 20 are used to be accommodated in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery cells 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cells 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0082] In the battery device 100, multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 20 are connected in series and in parallel. Multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 20 in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 20.

[0083] Please refer to Figure 4 , Figure 4 A partial structural diagram of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes multiple rows of battery cells 20, and the multiple rows of battery cells 20 are arranged along a first direction, and each row of battery cells 20 includes multiple battery cells 20 arranged along a second direction. The first direction and the second direction are respectively the length direction of the box body 10 and the width direction of the box body 10, and the first direction and the second direction are perpendicular to each other.

[0084] At present, the bottom ball impact test is an important test method for testing the installation performance of the battery device 100. The bottom ball impact test is a static test method that simulates the bottom impact conditions that the battery device 100 may encounter in actual use to evaluate its structural strength and safety. The test method generally includes using a ball head of a specified diameter to impact the bottom of the battery device 100 at a specific extrusion speed and loading force. The test results can reflect the bottom ball performance of the battery device 100. If the bottom ball performance of the battery device 100 is good, the structural strength and safety of the battery device 100 are high.

[0085] According to some embodiments of the present application, referring to Figure 4-Figure 7 , the present application provides a battery device 100 .

[0086] Reference Figure 4-Figure 7 The battery device 100 includes: a battery cell 20, a box body 10, a heat exchange member 14 and a reinforcing member 15. The battery cell 20 is accommodated in the box body 10. The box body 10 includes a mounting plate 13. The mounting plate 13 includes a heat exchange area 131 and a non-heat exchange area 133.

[0087] Taking the arrangement direction of the battery cells 20 and the mounting plate 13 as the projection direction, at least part of the projection of the heat exchange area 131 and at least part of the projection of the non-heat exchange area 133 are located in the projection of the battery cells 20 .

[0088] Among them, part or all of the projection of the heat exchange area 131 is located in the projection of the battery cell 20. When the heat exchange component 14 is installed in the heat exchange area 131, heat exchange can be performed with the battery cell 20. In the area where the projection of the battery cell 20 overlaps with the projection of the heat exchange area 131, a two-layer structure including the heat exchange area 131 of the mounting plate 13 and the heat exchange component 14 is provided on one side of the battery cell 20; part or all of the projection of the non-heat exchange area 133 is located in the projection of the battery cell 20. When the reinforcement component 15 is installed in the non-heat exchange area 133, the structural strength of the non-heat exchange area 133 can be strengthened. In the area where the projection of the battery cell 20 overlaps with the projection of the non-heat exchange area 133, a two-layer structure including the non-heat exchange area 133 of the mounting plate 13 and the reinforcement component 15 is provided on one side of the battery cell 20.

[0089] In some embodiments, taking the arrangement direction of the battery cell 20 and the mounting plate 13 as the projection direction, a portion of the projection of the battery cell 20 coincides with the projection of the heat exchange area 131, and another portion of the projection of the battery cell 20 coincides with the projection of the non-heat exchange area 133, that is, a two-layer structure is provided on one side of the battery cell 20 facing the mounting plate 13, thereby improving the bottom ball performance of the battery device and thus improving the reliability of the battery device.

[0090] The heat exchange area 131 is used to install the heat exchange element 14 , and the heat exchange element 14 is used to contact the battery cell 20 to exchange heat with the battery cell 20 .

[0091] The heat exchange element 14 is located in the heat exchange area 131. Since the heat exchange element 14 is installed in the heat exchange area 131, along the arrangement direction of the battery cells 20 and the mounting plate 13, the heat exchange area 131 is provided with a two-layer structure including the mounting plate 13 and the heat exchange element 14. In other words, with the arrangement direction of the battery cells 20 and the mounting plate 13 as the projection direction, at least part of the projection of the heat exchange area 131 of the mounting plate 13 and at least part of the projection of the heat exchange element 14 both fall into the projection of the battery cells 20, and the bottom ball performance of the heat exchange area 131 is better.

[0092] In some embodiments, the heat exchange element 14 can be installed on the side of the mounting plate 13 facing the battery cell 20 , that is, the heat exchange element 14 and the battery cell 20 are both installed in the box to facilitate heat exchange between the heat exchange element 14 and the battery cell 20 .

[0093] The heat exchange area 131 is a region for installing the heat exchange element 14 and performing heat exchange with the battery cell 20 , while the non-heat exchange area 133 is a region that does not perform heat exchange with the battery cell 20 .

[0094] Reference Figure 5 The heat exchange element 14 may be a liquid cooling plate or a bent tube, and a cooling liquid channel may be provided inside the heat exchange element 14 to remove the heat generated by the battery cell 20 through the circulation of the cooling liquid.

[0095] The heat exchange element 14 and the battery cell 20 may be in direct contact or closely attached to each other through a heat conductive material. The heat conductive material may be a heat conductive element or a heat conductive silicone sheet to improve the heat exchange efficiency.

[0096] The reinforcement 15 is installed in the non-heat exchange area 133. Since the non-heat exchange area 133 is installed with the reinforcement 15, the non-heat exchange area 133 is provided with the mounting plate 13 and the reinforcement 15 along the arrangement direction of the battery cell 20 and the mounting plate 13. Compared with one side of the battery cell 20 having only a single-layer structure such as the mounting plate 13, the present application improves the bottom ball performance of the non-heat exchange area 133 due to the two-layer structure such as the mounting plate 13 and the reinforcement 15.

[0097] In other words, taking the arrangement direction of the battery cells 20 and the mounting plate 13 as the projection direction, at least part of the projection of the non-heat exchange area 133 of the mounting plate 13 and at least part of the projection of the reinforcing member 15 are located in the projection of the battery cells 20 .

[0098] The reinforcing piece 15 may be installed on the side of the mounting plate 13 facing away from the battery cell 20 , or on the side of the mounting plate 13 facing the battery cell 20 , or on both sides of the mounting plate 13 .

[0099] In some embodiments, the reinforcing member 15 may be mounted on a side of the mounting plate 13 facing away from the battery cell 20 .

[0100] Among them, refer to Figure 5 and Figure 6 The heat exchange member 14 and the reinforcing member 15 are respectively arranged on both sides of the mounting plate 13 , and the reinforcing member 15 is arranged on the side of the mounting plate 13 away from the battery cell 20 , so as to facilitate the installation of the reinforcing member 15 on the outer side of the box body 10 .

[0101] The reinforcing member 15 is used to enhance the strength and rigidity of the non-heat exchange area 133 , and reduce deformation or damage of the battery device 100 in the bottom ball condition, thereby affecting the service life of the battery cell 20 and the reliability of the battery device 100 .

[0102] The reinforcing member 15 may be a metal member such as high-strength steel, aluminum alloy, or a hard structure such as a rubber plate. The shape and size of the reinforcing member 15 match the non-heat exchange area 133 of the mounting plate 13 .

[0103] The reinforcing member 15 can be designed to be in a flat plate shape, a grid shape, a rib shape or other shapes to meet different structural reinforcement requirements.

[0104] The reinforcing member 15 can be fixedly connected to the mounting plate 13 by one or more methods such as gluing, welding, and bolting.

[0105] In this embodiment, by providing the reinforcing member 15 , the overall strength and rigidity of the box body 10 can be improved, and the impact resistance of the battery pack can be enhanced.

[0106] The shape and number of the non-heat exchange area 133 are arranged according to the structure of the heat exchange area 131 , and at least part of the projection of the heat exchange area 131 and the non-heat exchange area 133 along the first direction overlaps with the projection of the battery cell 20 along the first direction.

[0107] According to the battery device 100 provided in the embodiment of the present application, a reinforcement member 15 is provided in the non-heat exchange area 133, so that a two-layer structure including a mounting plate 13 and a reinforcement member 15 exists on the side of the battery cell 20 facing the non-heat exchange area 133. Compared with the single-layer structure with only the mounting plate 13 at the bottom of the battery cell 20, the bottom ball performance of the non-heat exchange area 133 is improved.

[0108] According to some embodiments of the present application, referring to Figure 5 and Figure 6 The mounting plate 13 may be a bottom plate to increase the bottom ball performance of the battery device 100 .

[0109] According to some embodiments of the present application, referring to Figure 5 and Figure 6The heat exchange area 131 is recessed toward the outside of the box body 10 to form a first groove 132, and the non-heat exchange area 133 forms a second groove 134 on the side of the mounting plate 13 away from the battery cell 20, and the projection of the second groove 134 along the first direction falls into the projection of the reinforcement member 15 along the first direction.

[0110] The first direction is the height direction of the battery device 100 .

[0111] In this embodiment, at least a portion of the heat exchanger 14 is installed in the first groove 132. Exemplarily, all or part of the heat exchanger 14 is installed in the first groove 132. Compared with the solution in which the side of the mounting plate 13 facing the battery cell 20 is a plane and the heat exchanger 14 is installed on the plane, the heat exchanger 14 is embedded in the first groove 132 of the mounting plate 13 to form a built-in bent tube structure, which can avoid the battery cell 20 and improve the space utilization of the battery cell 20.

[0112] The mounting plate 13 has an uneven structure. The heat exchanger 14 is installed in the first groove 132 with the groove facing the battery cell 20 , and the second groove 134 with the groove facing away from the battery cell 20 is covered by the reinforcing member 15 .

[0113] According to some embodiments of the present application, the side of the heat exchange element 14 facing the battery cell 20 is flush with the side of the non-heat exchange area 133 facing the battery cell 20 .

[0114] Exemplarily, a first groove 132 may be provided on one side of the mounting plate 13 facing the battery cell 20 , the heat exchange element 14 is disposed in the first groove 132 , and the heat exchange element 14 is completely installed in the first groove 132 , and the groove depth of the first groove 132 is equal to that of the heat exchange element 14 .

[0115] Among them, the distance from the heat exchange element 14 to the battery cell 20 along the height direction is equal to the distance from the non-heat exchange area 133 to the battery cell 20 along the height direction, that is, on the side of the mounting plate 13 facing the battery cell 20, the heat exchange element 14 and the side of the non-heat exchange area 133 facing the battery cell 20 are located in the same plane, which facilitates the connection between the battery cell 20 and the mounting plate 13 and the heat exchange element 14, thereby improving the reliability of the battery device 100.

[0116] In the case where the width of the second groove 134 is smaller than the outer diameter of the bottom ball, the second groove 134 may not be provided with the reinforcing piece 15 , which has no effect on the bottom ball performance of the battery device 100 and reduces the cost.

[0117] According to some embodiments of the present application, referring to Figure 7The projection of the second groove 134 along the first direction falls within the projection of the reinforcement 15 along the height direction. In other words, the reinforcement 15 can cover the second groove 134, or a part of the reinforcement 15 covers the second groove 134, and another part extends a certain distance outside the second groove 134, so that the connection between the reinforcement 15 and the mounting plate 13 is more stable and reliable.

[0118] Exemplarily, at least a portion of the reinforcing member 15 is connected to the groove top of the second groove 134 , and the projection of the groove top of the second groove 134 along the first direction is located within the projection of the groove top of the first groove 132 along the first direction.

[0119] The projection of a portion of the reinforcing member 15 along the first direction coincides with the projection of the second groove 134 along the first direction, and the projection of another portion of the reinforcing member 15 along the first direction coincides with the projection of a portion of the first groove 132 .

[0120] At least a portion of the reinforcing piece 15 extends outward from the second groove 134 and is connected to the groove top of the second groove 134 , thereby improving the stability and reliability of the connection between the reinforcing piece 15 and the mounting plate 13 .

[0121] Among them, at least part of the reinforcing piece 15 is spaced from the bottom of the second groove 134, and at least part of the reinforcing piece 15 and the second groove 134 form a cavity, thereby providing additional buffer space when the mounting plate 13 is subjected to external force, thereby increasing the bottom ball performance of the battery device 100.

[0122] According to some embodiments of the present application, referring to Figure 6 and Figure 7 The reinforcing piece 15 is provided with a protrusion 151 protruding toward the second groove 134 .

[0123] The protrusion 151 is located in the second groove 134 . The protrusion 151 structure can increase the contact area between the reinforcement 15 and the mounting plate 13 , increase the deformation of the reinforcement 15 , and increase the structural strength of the reinforcement 15 , thereby improving the bottom ball performance of the battery device 100 .

[0124] At the same time, the protrusion 151 structure can also be designed into different shapes and sizes as needed to meet different structural strengthening requirements.

[0125] For example, the protrusions 151 can be designed in a dot shape, a strip shape, a mesh shape, or other shapes, depending on the design structure of the second groove 134. These protrusions 151 not only increase the contact area between the reinforcing member 15 and the mounting plate 13 and improve the structural strength, but also serve as heat dissipation channels to help dissipate the heat on the reinforcing member 15 and the mounting plate 13 more effectively.

[0126] According to some embodiments of the present application, referring to Figure 6, the reinforcement piece 15 is provided with reinforcing ribs.

[0127] For example, the reinforcing ribs may be designed in strips, meshes or other shapes to increase the rigidity and strength of the reinforcing member 15. The reinforcing ribs may be located on the surface of the reinforcing member 15 or may be embedded therein. For example, the reinforcing ribs may be located on the surface of the reinforcing member 15 facing the second groove 134 or on the surface of the reinforcing member 15 facing away from the second groove 134.

[0128] The reinforcing member 15 provides additional support and connection through the reinforcing ribs, effectively resisting external pressure and deformation, thereby enhancing the structural stability of the entire box body 10 and improving the bottom ball performance of the battery device 100.

[0129] The design of the reinforcing ribs can be adjusted according to the size, shape and load requirements of the second groove 134. For example, in the area where the reinforcing member 15 is subjected to greater force, the number or density of the reinforcing ribs can be increased to improve the load-bearing capacity of the area. At the same time, the shape and size of the reinforcing ribs can also be optimized to minimize the impact on the weight of the reinforcing member 15 while maintaining sufficient structural strength.

[0130] In this embodiment, the protrusion 151 and the reinforcing rib of the reinforcing member 15 are two important structural elements on the reinforcing member 15. The protrusion 151 and the reinforcing rib cooperate with each other to jointly improve the structural strength and heat dissipation performance of the reinforcing member 15. The protrusion 151 increases the contact area between the reinforcing member 15 and the mounting plate 13, thereby improving the heat conduction efficiency; while the reinforcing rib provides additional support and connection, thereby enhancing the rigidity and strength of the reinforcing member 15.

[0131] According to some embodiments of the present application, referring to Figure 6 and Figure 7 The reinforcing piece 15 includes a plurality of sub-portions 152 , and the second groove 134 includes a plurality of sub-areas 1331 , and projections of the plurality of sub-areas 1331 along the first direction fall into the union of projections of the plurality of sub-portions 152 along the first direction.

[0132] The second groove 134 may be divided into a plurality of sub-areas 1331 based on the distribution of the heat exchange area 131 , and the reinforcing member 15 may be divided into a plurality of sub-portions 152 , each of the sub-areas 1331 corresponding to one or more sub-portions 152 of the reinforcing member 15 .

[0133] The shape and size of each sub-area 1331 can be the same or different, the shape and size of each sub-portion 152 can be the same or different, and each sub-area 1331 overlaps with at least one sub-portion 152, so that the reinforcement 15 can cover and strengthen the area where the second groove 134 is located, so that the bottom of the battery cell 20 includes at least a two-layer structure of a mounting plate 13 and a reinforcement 15, thereby increasing the structural strength of the non-heat exchange area 133 and enhancing the overall bottom ball performance of the battery device 100.

[0134] According to some embodiments of the present application, referring to Figure 7 The reinforcing member 15 is a rubber plate, and the rubber plate is disposed in the second groove 134 .

[0135] The reinforcing member 15 may be a single material or a mixture of structural adhesive, fiber, etc. The adhesive plate may be baked and hardened together with the mounting plate 13 to improve the structural strength of the non-heat exchange area 133 , thereby improving the bottom ball performance of the battery device 100 .

[0136] According to some embodiments of the present application, the tensile strength Rm of the mounting plate 13 satisfies: Rm ≥ 900 MPa.

[0137] Exemplarily, the tensile strength Rm of the mounting plate 13 may be 900 MPa, 1300 MPa, 1800 MPa, 2200 MPa or a greater value, so that the bottom ball performance of the battery device 100 can be improved by using the mounting plate 13 with high tensile strength.

[0138] According to some embodiments of the present application, the tensile strength Rm of the mounting plate 13 satisfies: 1300Mpa≥Rm≥2000Mpa.

[0139] Exemplarily, the tensile strength Rm of the mounting plate 13 may be 1300 MPa, 1500 MPa, 1600 MPa or 2000 MPa, so that the bottom ball performance of the battery device 100 can be improved by using the mounting plate 13 with high tensile strength.

[0140] The mounting plate 13 may be an ultra-high strength steel plate.

[0141] According to some embodiments of the present application, referring to Figure 7 The reinforcing piece 15 is provided with an avoidance hole, and the avoidance hole is used to avoid the fasteners of the mounting plate 13.

[0142] According to some embodiments of the present application, the present application further provides an electrical device, including: a battery device 100 as in any of the above embodiments, the battery device 100 is used to store or provide electrical energy.

[0143] According to some embodiments of the present application, the present application also provides an energy storage device 1, which includes a plurality of battery cells 20 of any of the above schemes, and the battery cells 20 are used to store or provide electrical energy; or the energy storage device 1 includes a plurality of battery devices 100 of any of the above schemes, and the battery devices 100 are used to store or provide electrical energy.

[0144] According to some embodiments of the present application, the present application also provides an energy storage system, which includes: a power conversion device 2 and an energy storage device 1 of any of the above schemes, and the power conversion device 2 is used to electrically connect the power generation equipment 3 and the energy storage device 1.

[0145] According to some embodiments of the present application, the present application further provides an electric device. The electric device includes a battery cell 20 of any of the above solutions, and the battery cell 20 is used to store or provide electric energy; or the electric device includes a battery device 100 of any of the above solutions, and the battery device 100 is used to store or provide electric energy; or the electric device includes an energy storage device 1 of any of the above solutions, and the battery cell 20 or the battery device 100 is used to store or provide electric energy; or the electric device includes an energy storage system of any of the above solutions, and the battery cell 20 or the battery device 100 is used to store or provide electric energy.

[0146] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 .

[0147] According to some embodiments of the present application, the present application also provides a charging network, which includes a charging pile 4 and an energy storage device 1 of any of the above schemes or an energy storage system of any of the above schemes, and the energy storage device 1 is used to provide electrical energy to the charging pile 4.

[0148] The energy storage device 1 may be located inside the charging pile 4 (eg, an integrated storage and charging device), or may be located outside the charging pile 4 .

[0149] According to some embodiments of the present application, see Figure 5-Figure 7 , the present application provides a battery device 100 .

[0150] The battery device 100 includes: a battery cell 20 , a box 10 , a heat exchanger 14 and a reinforcing member 15 . The battery cell 20 is accommodated in the box 10 . The box 10 includes a mounting plate 13 . The mounting plate 13 includes a heat exchange area 131 and a non-heat exchange area 133 .

[0151] The heat exchange area 131 is used to install the heat exchange element 14 , and the heat exchange element 14 is used to contact the battery cell 20 to exchange heat with the battery cell 20 .

[0152] The heat exchange element 14 is installed on the side of the mounting plate 13 facing the battery cell 20 and is located in the heat exchange area 131. Since the heat exchange element 14 is installed in the heat exchange area 131, there is a two-layer structure of the mounting plate 13 and the heat exchange element 14 on the side of the battery cell 20 facing the heat exchange area 131, and the bottom ball performance is better.

[0153] The reinforcement 15 is installed on the side of the mounting plate 13 facing away from the battery cell 20 and covers the non-heat exchange area 133. Since the non-heat exchange area 133 is installed with the reinforcement 15, there is a two-layer structure of the mounting plate 13 and the reinforcement 15 on the side of the battery cell 20 facing the non-heat exchange area 133. Compared with the structure with only the mounting plate 13 at the bottom of the battery cell 20, the bottom ball performance of the non-heat exchange area 133 is improved.

[0154] The heat exchange area 131 is recessed toward the outside of the box body 10 to form a first groove 132, and the non-heat exchange area 133 forms a second groove 134 on the side of the mounting plate 13 away from the battery cell 20, and the projection of the second groove 134 along the first direction falls into the projection of the reinforcement member 15 along the first direction.

[0155] The first direction is the height direction of the battery device 100 .

[0156] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0157] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Battery cells; A box body, wherein the battery cell is accommodated in the box body, the box body comprises a mounting plate, the mounting plate comprises a heat exchange area and a non-heat exchange area, the heat exchange area and the non-heat exchange area are staggered, and the arrangement direction of the battery cell and the mounting plate is taken as the projection direction, and the projection of at least part of the heat exchange area and the projection of at least part of the non-heat exchange area are located in the projection of the battery cell; A heat exchange element installed in the heat exchange area; The reinforcing member is installed in the non-heat exchange area.

2. The battery device according to claim 1, characterized in that: The heat exchange area is recessed toward the outer side of the box body to form a first groove, and the non-heat exchange area forms a second groove on the side of the mounting plate away from the battery cell, at least part of the heat exchange component is installed in the first groove, and the projection of the second groove along the first direction falls within the projection of the reinforcement component along the first direction.

3. The battery device according to claim 2, characterized in that: The side surface of the heat exchange element facing the battery cell is flush with the side surface of the non-heat exchange area facing the battery cell.

4. The battery device according to claim 2, characterized in that: The reinforcing member covers the second groove.

5. The battery device according to claim 4, characterized in that: At least a portion of the reinforcing piece is connected to the groove top of the second groove, and at least a portion of the reinforcing piece is spaced apart from the groove bottom of the second groove.

6. The battery device according to claim 4, characterized in that: The reinforcing piece is provided with a protrusion protruding toward the second groove, and the protrusion is located in the second groove.

7. The battery device according to claim 4, characterized in that: The reinforcing piece is provided with reinforcing ribs.

8. The battery device according to claim 2, characterized in that: The reinforcing piece includes a plurality of sub-portions, the second groove includes a plurality of sub-areas, and projections of the plurality of sub-areas along the first direction fall within a union of projections of the plurality of sub-portions along the first direction.

9. The battery device according to claim 2, characterized in that: The reinforcing member is a rubber plate, and the rubber plate is arranged in the second groove.

10. The battery device according to any one of claims 1 to 9, characterized in that: The tensile strength Rm of the mounting plate satisfies: Rm≥900Mpa.

11. The battery device according to any one of claims 1 to 9, characterized in that: The tensile strength Rm of the mounting plate satisfies: 1300Mpa≥Rm≥2000Mpa.

12. The battery device according to any one of claims 1 to 9, characterized in that: The heat exchange component is arranged on a side of the mounting plate facing the battery cell; and / or the reinforcing component is arranged on a side of the mounting plate facing away from the battery cell.

13. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 12, wherein the battery device is used to store or provide electrical energy.

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