Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device comprises a battery monomer assembly, a high-pressure heat source and a refrigerant heat exchange part, wherein a refrigerant conduction channel for conducting a refrigerant is arranged in the refrigerant heat exchange part; the single batteries and the high-pressure heat source are both in heat conduction connection with the refrigerant heat exchange component, and the refrigerant heat exchange component is configured to adjust the temperature of the single batteries and the high-pressure heat source. The battery device has relatively high energy density.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] How to improve the energy density of battery devices is an urgent problem to be solved in battery technology. Summary of the Utility Model

[0004] In view of the above problems, this application provides a battery device and an electrical device, which can improve the energy density of the battery device.

[0005] In a first aspect, this application provides a battery device, which includes a battery cell assembly, a high-pressure heat source, and a refrigerant heat exchange component. The refrigerant heat exchange component is internally provided with a refrigerant conduction channel for conducting refrigerant; both the battery cell and the high-pressure heat source are thermally connected to the refrigerant heat exchange component, and the refrigerant heat exchange component is configured to adjust the temperatures of the battery cell and the high-pressure heat source.

[0006] In the technical solution of the embodiments of this application, both the battery cell and the high-pressure heat source are thermally connected to the refrigerant heat exchange component, and heat exchange can be synchronously performed on the battery cell and the high-pressure heat source through the refrigerant heat exchange component. Compared with a battery device in which different refrigerant heat exchange components are respectively arranged for the high-pressure heat source and the battery cell assembly, using the refrigerant heat exchange component to synchronously perform heat exchange on the battery cell and the high-pressure heat source simplifies components such as connection joints, connection pipelines, and seals, which is beneficial to improving the energy density of the battery device.

[0007] In one or more embodiments of the first aspect, the refrigerant heat exchange component has a flow channel for accommodating a heat exchange medium. In the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the flow channel have an overlapping area, and the orthographic projection of the high-pressure heat source and the orthographic projection of the flow channel have an overlapping area.

[0008] In the above scheme, since the orthographic projection of the battery cell assembly and the orthographic projection of the flow channel have an overlapping area, the orthographic projection of the high-pressure heat source and the orthographic projection of the flow channel have an overlapping area in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component. On the one hand, since flow channels are arranged on one side of the high-pressure heat source and one side of the battery cell along the thickness direction of the refrigerant heat exchange component, it is beneficial to achieve a high heat exchange efficiency between the battery cell and the refrigerant heat exchange component and between the high-pressure heat source and the refrigerant heat exchange component. On the other hand, the flow channel used for heat exchange with the high-pressure heat source and the flow channel used for heat exchange with the battery cell can share the space of the refrigerant heat exchange component, which is beneficial to improve the energy density of the battery device.

[0009] In one or more embodiments of the first aspect, the flow channel includes a plurality of parallel sub-flow channels, at least part of the sub-flow channels include a first flow channel segment and a second flow channel segment, and in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the first flow channel segment have an overlapping area, and the orthographic projection of the high-pressure heat source and the orthographic projection of the second flow channel segment have an overlapping area. The first flow channel segment and the second flow channel segment are connected to each other.

[0010] In the above scheme, since the orthographic projection of the battery cell assembly and the orthographic projection of the first flow channel section have an overlapping area in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source and the orthographic projection of the second flow channel section have an overlapping area, and the first flow channel section and the second flow channel section are connected to each other. The high-pressure heat source and the battery cell can exchange heat through the same flow channel, which is conducive to further streamlining the connection joints, connection pipes and seals and other components, and further improving the energy density of the battery device. In addition, it can also simplify the assembly process of the battery device and improve production efficiency.

[0011] In one or more embodiments of the first aspect, the refrigerant heat exchange component includes a first plate body and a second plate body which are stacked, a groove is formed on a side of the first plate body facing the second plate body, and the groove and the second plate body together form a flow channel.

[0012] In the above scheme, on the one hand, the shape design of the groove has better flexibility, which can realize the diversification of the flow channel design while controlling the cost, thereby improving the adaptability of the refrigerant heat exchange component. On the other hand, compared with the traditional method of constructing the flow channel by arranging the pipeline, the method of using the first plate to cover the groove notch to form the flow channel can effectively reduce the thickness of the refrigerant heat exchange component while maintaining the same cross-sectional area of ​​the flow channel, thereby improving the energy density of the battery device.

[0013] In one or more embodiments of the first aspect, the high-voltage heat source and the battery cells are both arranged on a side of the second plate body away from the first plate body.

[0014] In the above solution, the high-pressure heat source and the battery cell can share part of the space, which is beneficial to improving the energy density of the battery device.

[0015] In one or more embodiments of the first aspect, the battery device further includes a heat spreader disposed between the high-pressure heat source and the refrigerant heat exchange component. The heat spreader is used to transfer the heat of the high-pressure heat source to the refrigerant heat exchange component. Among them, in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source is located within the orthographic projection of the heat spreader.

[0016] In the above solution, during the heat exchange process between the high-pressure heat source and the refrigerant heat exchange component, the heat spreader can quickly spread the heat, improve the heat exchange uniformity of the high-pressure heat source, and can increase the service life of the high-pressure heat source.

[0017] In one or more embodiments of the first aspect, in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the area of the orthographic projection of the heat spreader is larger than the area of the orthographic projection of the high-pressure heat source.

[0018] In the above solution, since in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the area of the orthographic projection of the heat spreader is larger than the area of the orthographic projection of the high-pressure heat source. During the heat exchange process of the high-pressure heat source, the high heat flux density originally concentrated in a small area can be dispersed to a larger area, further improving the heat exchange uniformity of the high-pressure heat source.

[0019] In one or more embodiments of the first aspect, the refrigerant heat exchange component has a first region and a second region. The battery cell assembly is disposed in the first region, and the heat spreader is disposed in the second region. The first region and the second region are integrally formed.

[0020] In the above solution, the refrigerant heat exchange component for heat exchanging with the battery cell and the high-pressure heat source can be processed simultaneously through one processing, which is beneficial to improving the production efficiency of the battery device. At the same time, the refrigerant heat exchange component can also have high structural stability.

[0021] In one or more embodiments of the first aspect, the refrigerant heat exchange component has a flow channel for accommodating a heat exchange medium. A part of the flow channel is located in the second region. In the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the heat spreader covers the orthographic projection of the flow channel in the second region.

[0022] In the above solution, since in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the heat spreader covers the orthographic projection of the flow channel in the second region, the heat diffused through the heat spreader can be more efficiently heat-exchanged with the heat exchange medium in the flow channel, improving the heat exchange efficiency between the high-pressure heat source and the refrigerant heat exchange component.

[0023] In one or more embodiments of the first aspect, the heat spreader and the refrigerant heat exchange component are integrally formed.

[0024] In the above solutions, the heat pipe and the refrigerant heat exchange component are integrally formed, which can reduce the seams or connection points between the two, reduce the risk of stress concentration between the two, and improve the connection stability between the two.

[0025] In one or more embodiments of the first aspect, the heat pipe and the refrigerant heat exchange component are separately formed.

[0026] In the above solutions, separately forming the heat pipe and the refrigerant heat exchange component is easier to control the processing precision of the two, which is beneficial to improving the reliability of the two. At the same time, the maintenance costs of the heat pipe and the refrigerant heat exchange component can also be reduced.

[0027] In one or more embodiments of the first aspect, the heat pipe and the refrigerant heat exchange component are bonded or welded.

[0028] In the above solutions, using the bonding or welding method to connect the heat pipe and the refrigerant heat exchange component can effectively improve the assembly efficiency.

[0029] In one or more embodiments of the first aspect, the heat pipe includes a housing, a capillary structure, and a first phase change material, and both the capillary structure and the first phase change material are disposed inside the housing.

[0030] In the above solutions, through the cooperation of the capillary structure and the first phase change material, the first phase change material can circulate and move inside the housing with high efficiency, forming a heat and cold cycle, reducing the risk of heat concentration, and improving the reliability of the heat pipe.

[0031] In one or more embodiments of the first aspect, a partition wall is disposed inside the housing, and the partition wall divides the space inside the housing into a first chamber and a second chamber. Both the capillary structure and the first phase change material are disposed in the first chamber, and a second phase change material is disposed in the second chamber.

[0032] In the above solutions, one of the first phase change material and the second phase change material can achieve the effect of temperature equalization, and the other can play the role of storing heat. The high-pressure heat source exchanges heat with the refrigerant heat exchange component through the above-mentioned heat pipe, which can reduce the risk of uneven heat distribution in the battery device caused by the large deviation between the heat exchange efficiency of the battery cell and the refrigerant heat exchange component and the heat exchange efficiency of the high-pressure heat source and the refrigerant heat exchange component, and improve the reliability of the refrigerant heat exchange component and the battery device.

[0033] In one or more embodiments of the first aspect, the first phase change material is one of tetrafluoroethane, difluoromethane, pentafluoroethane, propane, and carbon dioxide.

[0034] In one or more embodiments of the first aspect, the second phase change material is one of n-octadecane, paraffin, graphite, calcium chloride hexahydrate, and sodium sulfate decahydrate.

[0035] In one or more embodiments of the first aspect, the first chamber and the second chamber are arranged along the thickness direction of the refrigerant heat exchange component, and the first chamber is closer to the high-pressure heat source than the second chamber.

[0036] In the above solution, the first chamber and the second chamber are arranged based on the thickness direction of the refrigerant heat exchange component, which reduces the design and assembly difficulty of the heat pipe.

[0037] In one or more embodiments of the first aspect, the housing includes a first wall and a second wall that are oppositely arranged along the thickness direction of the refrigerant heat exchange component. A partition wall is arranged between the first wall and the second wall. A first chamber is formed between the first wall and the partition wall, and a second chamber is formed between the second wall and the partition wall. The heat pipe further includes a heat conducting member, and the heat conducting member is arranged in the second chamber and connects the partition wall and the second wall.

[0038] In the above solution, the heat conducting member can improve the heat exchange efficiency between the first phase change material and the second phase change material. At the same time, since the heat conducting member connects the partition wall and the second wall, the arrangement of the heat conducting member can also make the shape of the second chamber stable and reliable.

[0039] In one or more embodiments of the first aspect, the housing includes a first wall and a second wall that are oppositely arranged along the thickness direction of the refrigerant heat exchange component. A partition wall is arranged between the first wall and the second wall. A first chamber is formed between the first wall and the partition wall, and a second chamber is formed between the second wall and the partition wall. The heat pipe further includes a support member, and the support member is arranged in the first chamber and connects the first wall and the partition wall.

[0040] In the above solution, since the support member connects the first wall and the partition wall, the arrangement of the support member can also make the shape of the first chamber stable and reliable.

[0041] In one or more embodiments of the first aspect, a plurality of support members are provided, and the plurality of support members are arranged in an array.

[0042] In the above solution, the plurality of support members arranged in an array can further improve the stability of the first chamber.

[0043] In one or more embodiments of the first aspect, the refrigerant heat exchange component is a direct cooling plate.

[0044] In the above solution, the direct cooling plate has a high heat conduction efficiency, which is beneficial to improving the reliability of the battery device.

[0045] In one or more embodiments of the first aspect, the refrigerant heat exchange component carries the battery cell assembly.

[0046] In the above solution, the refrigerant heat exchange component has both the functions of structural load bearing and thermal management in the battery device, which can make the layout of the battery device more compact, thereby improving the overall energy density.

[0047] In one or more embodiments of the first aspect, the high-voltage heat source includes a housing and high-voltage devices. The high-voltage devices are disposed within the housing and connected to the housing, and the housing is thermally connected to the refrigerant heat exchange component.

[0048] In the above solution, by disposing the high-voltage devices within the housing and thermally connecting the housing to the refrigerant heat exchange component, the assembly efficiency between the high-voltage heat source and the refrigerant heat exchange component can be improved due to the presence of the housing, and the assembly difficulty between the high-voltage heat source and the refrigerant heat exchange component can be reduced.

[0049] In one or more embodiments of the first aspect, the high-voltage heat source includes high-voltage devices, and the high-voltage devices are thermally connected to the refrigerant heat exchange component.

[0050] In the above solution, the thermal connection between the high-voltage devices and the refrigerant heat exchange component is conducive to achieving a relatively high heat exchange efficiency between the high-voltage devices and the refrigerant heat exchange component.

[0051] In one or more embodiments of the first aspect, the high-voltage devices include at least one of a relay, an insulated gate bipolar transistor, a fuse, and a bus bar.

[0052] In a second aspect, the present application provides an electrical device, which includes the battery device in one or more of the above embodiments, and the battery device is used to provide electrical energy.

[0053] In the above solution, since the battery device in one or more of the above embodiments has high reliability, the electrical device including the battery device in one or more of the above embodiments also has high reliability.

[0054] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented in accordance with the content of the specification. And in order to make the other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. And in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0056] Figure 1 is a schematic structural diagram of a vehicle according to some embodiments of the present application;

[0057] Figure 2 is an exploded view of a battery device according to some embodiments of the present application;

[0058] Figure 3Exploded view of the battery device according to some other embodiments of the present application;

[0059] Figure 4 Exploded view of the partial structure of the battery device according to some embodiments of the present application;

[0060] Figure 5 is Figure 4 Partial enlarged view of position A in

[0061] Figure 6 Exploded view of the heat pipe according to some embodiments of the present application;

[0062] Figure 7 Schematic structural view of the refrigerant heat exchange component according to some embodiments of the present application;

[0063] Figure 8 Schematic structural view of the refrigerant heat exchange component according to some other embodiments of the present application;

[0064] Figure 9 Cross-sectional view of the refrigerant heat exchange component according to some embodiments of the present application;

[0065] Figure 10 is Figure 9 Partial enlarged view of position B in

[0066] Figure 11 Schematic structural view of the partial structure of the heat pipe of the present application.

[0067] The reference numerals in the specific embodiments are as follows:

[0068] 1000 - vehicle; 200 - controller; 300 - motor; 100 - battery device; 11 - box body; 111 - first box body; 112 - second box body; 1121 - outer frame; 1122 - bottom plate; 12 - battery cell; 13 - refrigerant heat exchange component; 131 - first plate body; 132 - second plate body; 1321 - groove; 133 - joint; 134 - first region; 135 - second region; 14 - high - pressure heat source; 15 - heat pipe; 151 - outer shell; 152 - partition wall; 153 - first cavity; 154 - second cavity; 155 - first wall; 156 - second wall; 157 - first border; 158 - second border; 159 - capillary structure; 1510 - heat conducting member; 1511 - support member; 16 - flow channel; 161 - first flow channel section 161; 162 - second flow channel section 162; X - thickness direction of the refrigerant heat exchange component. Specific Embodiments

[0069] Hereinafter, embodiments of the technical solutions of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, so they are only examples and cannot be used to limit the protection scope of the present application.

[0070] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs; the terms used herein are for the purpose of describing specific embodiments only and are not intended to limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the above drawings are intended to cover non-exclusive inclusion.

[0071] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0072] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0073] In the description of the embodiments of this application, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of sheets" refers to two or more sheets (including two sheets).

[0074] In the embodiments of this application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging to continue use after discharging.

[0075] The battery cell includes but is not limited to lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc.

[0076] The battery cell generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and discharging process of the battery cell, active ions (such as lithium ions) are embedded and extracted back and forth between the positive electrode and the negative electrode. The separator is disposed between the positive electrode and the negative electrode, which can reduce the risk of short circuit between the positive and negative electrodes and at the same time allow active ions to pass through.

[0077] In some embodiments, the battery cell further includes an electrolyte, which plays a role in conducting ions between the positive and negative electrodes. The electrolyte can be liquid, gel or solid. Among them, the liquid electrolyte includes electrolyte salts and solvents.

[0078] In some embodiments, the electrode assembly has a wound structure. The positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0079] In some embodiments, the electrode assembly has a stacked structure.

[0080] In some embodiments, the shape of the electrode assembly can be cylindrical, flat, prismatic, or the like.

[0081] In some embodiments, the electrode assembly is provided with tabs, and the tabs can conduct current out of the electrode assembly. The tabs include a positive tab and a negative tab.

[0082] As an example, the battery cell can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, and a multi-prismatic battery cell. The multi-prismatic battery cell is, for example, a hexagonal prismatic battery cell, etc.

[0083] The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity.

[0084] The battery device (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 (Battery Cell Assembly) may include a plurality of battery cells, and the plurality of battery cells are connected in series, parallel, or in a hybrid connection through a current collecting component.

[0085] In some embodiments, the battery cell assembly (Battery Cell Assembly) is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly can be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0086] In some embodiments, the battery device can be a battery pack (battery Pack), and the battery pack includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0087] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box body by fixing the battery module in the box body.

[0088] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells to the box body.

[0089] In some embodiments, the box body can be part of the chassis structure of a vehicle. For example, part of the box body can form at least part of the floor of the vehicle, or part of the box body can form at least part of the cross beams and longitudinal beams of the vehicle.

[0090] In some embodiments, the battery can be an energy storage device. The energy storage device includes an energy storage container, an energy storage electrical cabinet, etc.

[0091] The following will mainly focus on the cuboid battery cell. It should be understood that the embodiments described below are also applicable to cylindrical battery cells, soft-pack battery cells, or blade battery cells in some aspects.

[0092] In a typical battery cell structure, the battery cell includes an outer casing, an electrode assembly, and an electrolyte. The outer casing includes an end cap and a housing, and the end cap closes the opening of the housing to define an accommodation space for accommodating the electrode assembly. In some embodiments, the outer casing can be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite outer shell), or an aluminum-plastic film, etc.

[0093] The development of battery technology needs to consider multiple design factors simultaneously. For example, performance parameters such as reliability, cycle life, discharge capacity, charge-discharge rate, etc. In addition, the energy density of the battery device also needs to be considered.

[0094] In the design of a battery device, usually two sets of thermal management systems are equipped. One set focuses on regulating the temperature of the battery cell, while the other is responsible for controlling the temperature of the high-voltage heat source. Such a dual thermal management system design also means that at least two sets of connecting pipelines, connecting joints, seals, and sensors and other external components are required. This not only makes the internal structure of the battery device more complex but also occupies more space. Therefore, such a battery device performs poorly in terms of energy density.

[0095] In view of this, the present application provides a battery device. The battery device includes a battery cell assembly, a high-voltage heat source, and a refrigerant heat exchange component. The battery cell assembly includes a plurality of battery cells. The high-voltage heat source is electrically connected to the battery cell assembly. Both the battery cell and the high-voltage heat source are thermally connected to the refrigerant heat exchange component. The refrigerant heat exchange component is used to regulate the temperatures of the battery cell and the high-voltage heat source. Both the battery cell and the high-voltage heat source are thermally connected to the refrigerant heat exchange component, and heat exchange of the battery cell and the high-voltage heat source can be synchronized through the refrigerant heat exchange component. Compared with a battery device that separately arranges different refrigerant heat exchange components for the high-voltage heat source and the battery cell assembly, using the refrigerant heat exchange component to synchronously perform heat exchange on the battery cell and the high-voltage heat source simplifies components such as connecting joints, connecting pipelines, and seals, which is beneficial to improving the energy density of the battery device.

[0096] The technical solutions described in the embodiments of the present application are applicable to battery cells, battery devices, and electrical devices using battery devices.

[0097] Electrical devices include, but are not limited to: battery cars, electric vehicles, ships, spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles, and spaceships, etc.

[0098] For the convenience of description, the following embodiments will be described by taking a vehicle as an example of an electrical device in an embodiment of the present application.

[0099] For example, Figure 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or an extended-range electric vehicle, etc. A motor 300, a controller 200, and a battery device 100 can be arranged inside the vehicle 1000. The controller 200 is used to control the power supply of the battery device 100 to the motor 300. For example, the battery device 100 can be arranged at the bottom, the front end, or the rear end of the vehicle 1000. The battery device 100 can be used for the power supply of the vehicle 1000. For example, the battery device 100 can be used as the operating power source of the vehicle 1000 and used for the circuit system of the vehicle 1000, such as the working power consumption requirements for starting, navigating, and running of the vehicle 1000. In another embodiment of the present application, the battery device 100 can not only be used as the operating power source of the vehicle 1000, but also be used as the driving power source of the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0100] To meet different power usage requirements, the battery device 100 can include a plurality of battery cells 12. Among them, the plurality of battery cells 12 can be connected in series, in parallel, or in a series-parallel combination. The series-parallel combination means a combination of series and parallel connections. The battery device 100 can also be referred to as a battery pack. Optionally, the plurality of battery cells 12 can be first connected in series, in parallel, or in a series-parallel combination to form a battery cell assembly, and then the plurality of battery cell assemblies can be connected in series, in parallel, or in a series-parallel combination to form the battery device 100. That is to say, the plurality of battery cells 12 can directly form the battery device 100, or can first form a battery cell assembly, and then the battery cell assembly forms the battery device 100.

[0101] For example, please refer to Figure 2 , Figure 2Exploded view of the battery device 100 according to some embodiments of the present application. The battery device 100 may include a plurality of battery cells 12. The battery device 100 may further include a box body 11. The interior of the box body 11 is a hollow structure, and the plurality of battery cells 12 are accommodated in the box body 11. As shown in the figure, here they are respectively referred to as the first box body 111 and the second box body 112, and the first box body 111 and the second box body 112 are snapped together. The shapes of the first box body 111 and the second box body 112 may be determined according to the shape of the combination of the plurality of battery cells 12. The first box body 111 and the second box body 112 may each have an open face. For example, both the first box body 111 and the second box body 112 may be hollow cuboids and each has only one face as the open face. The open faces of the first box body 111 and the second box body 112 are arranged opposite to each other, and the first box body 111 and the second box body 112 are snapped together to form the box body 11 with a closed chamber. The plurality of battery cells 12 are connected in parallel, in series, or in a hybrid connection and then placed in the box body 11 formed after the first box body 111 and the second box body 112 are snapped together.

[0102] Optionally, the battery device 100 may further include other structures, which will not be elaborated here one by one. For example, the battery device 100 may further include a busbar component for realizing electrical connection between the plurality of battery cells 12, such as parallel connection, series connection, or hybrid connection. Specifically, the busbar component can achieve electrical connection between the battery cells 12 by connecting the electrode terminals of the battery cells 12. Further, the busbar component can be fixed to the electrode terminals of the battery cells 12 by welding. The electrical energy of the plurality of battery cells 12 can be further led out through a conductive mechanism passing through the box body 11.

[0103] According to different power requirements, the number of battery cells 12 can be set to any value. The plurality of battery cells 12 can be connected in series, in parallel, or in a hybrid connection to achieve a larger capacity or power. Since the number of battery cells 12 included in each battery device 100 may be relatively large, for the convenience of installation, the battery cells 12 can be grouped, and each group of battery cells 12 forms a battery cell assembly. The number of battery cells 12 included in the battery cell assembly is not limited and can be set according to requirements. The battery device 100 may include a plurality of battery cell assemblies, and these battery cell assemblies can be connected in series, in parallel, or in a hybrid connection.

[0104] According to some embodiments of the present application, please refer to Figures 3 - 5 , the present application provides a battery device 100. The battery device 100 includes a battery cell assembly, a high-pressure heat source 14, and a refrigerant heat exchange component 13. The refrigerant heat exchange component 13 is internally provided with a refrigerant conduction channel for conducting the refrigerant; both the battery cell 12 and the high-pressure heat source 14 are thermally connected to the refrigerant heat exchange component 13, and the refrigerant heat exchange component 13 is configured to adjust the temperatures of the battery cell 12 and the high-pressure heat source 14.

[0105] In some embodiments, the battery cell assembly includes a plurality of battery cells 12.

[0106] The thermal connection can be a direct connection. For example, both the battery cell 12 and the high-voltage heat source 14 are in contact with the refrigerant heat exchange component 13. Of course, the thermal connection can also be understood as an indirect connection. For example, both the battery cell 12 and the high-voltage heat source 14 are connected to the refrigerant heat exchange component 13 through a thermal conduction component. Among them, the thermal conduction component can be thermal conductive glue, heat sink, etc.

[0107] In some embodiments, the material of the refrigerant heat exchange component 13 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0108] In some embodiments, the material of the refrigerant heat exchange component 13 can be plastic.

[0109] In some embodiments, the interior of the refrigerant heat exchange component 13 has a flow channel 16 for accommodating a medium to regulate the temperatures of the battery cell 12 and the high-voltage heat source 14.

[0110] In some embodiments, the refrigerant heat exchange component 13 can regulate the temperature of the battery cell 12 by accommodating a medium for heat exchange with the battery cell 12. The refrigerant heat exchange component 13 can accommodate a fluid or a solid-liquid phase change material to regulate the temperature of the battery cell 12. The fluid can be a liquid or a gas, or a gas-liquid phase change material.

[0111] Regulating the temperature means heating or cooling. Exemplarily, in the case where the battery cell 12 and the high-voltage heat source 14 are cooled or the temperature is lowered, the refrigerant heat exchange component 13 is used to accommodate a cooling fluid or a solid-liquid phase change material to lower the temperature of the battery cell 12 or the high-voltage heat source 14. At this time, the refrigerant heat exchange component 13 can also be called a cooling component, a cooling system, a cooling plate, etc. The fluid it accommodates can also be called a cooling medium or a cooling fluid, and more specifically, it can be called a coolant or a cooling gas. In addition, the refrigerant heat exchange component 13 can also be used for heating to raise the temperature of the battery cell 12 and the high-voltage heat source 14, which is not limited in the embodiments of the present application. Optionally, the fluid can flow in a cycle to achieve a better temperature regulation effect. Optionally, the fluid can be water, a mixture of water and ethylene glycol, or air, etc. Optionally, the fluid can also not flow in a cycle.

[0112] In some embodiments, the refrigerant heat exchange component 13 can be a water-cooled plate. By introducing water at a lower temperature, the battery cell 12 and the high-voltage heat source 14 can be cooled, and by introducing water at a higher temperature, the battery cell 12 and the high-voltage heat source 14 can be heated.

[0113] The following uses cooling as an example to illustrate temperature regulation.

[0114] In some embodiments, the refrigerant heat exchange component 13 may be a roll-formed part.

[0115] In some embodiments, the refrigerant heat exchange component 13 may be a pipe component, and the pipe component may be arranged in a meandering manner or in a serpentine shape.

[0116] In some embodiments, the battery device 100 further includes a battery management system, which is configured to receive the temperature data of the battery cells 12 and the high-voltage heat source 14, and control the refrigerant heat exchange component 13 to adjust the temperatures of the battery cells 12 and the high-voltage heat source 14 based on the temperature data. Since both the battery cells 12 and the high-voltage heat source 14 are thermally connected to the refrigerant heat exchange component 13, with such an arrangement, the battery management system can process the temperature data according to a set of control logics, reducing the risk of alternating overcooling and overheating in the battery device 100 and improving the reliability of the battery device 100. In addition, in the event of an emergency where a battery cell 12 experiences thermal runaway, the refrigerant heat exchange component 13 can also synchronously activate an emergency cooling mechanism to cool the high-voltage heat source 14 synchronously.

[0117] In the technical solution of the embodiments of the present application, both the battery cells 12 and the high-voltage heat source 14 are thermally connected to the refrigerant heat exchange component 13, and heat exchange of the battery cells 12 and the high-voltage heat source 14 can be synchronously performed through the refrigerant heat exchange component 13. Compared with the battery device 100 in which different refrigerant heat exchange components 13 are respectively arranged for the high-voltage heat source 14 and the battery cell assembly, synchronously performing heat exchange of the battery cells 12 and the high-voltage heat source 14 by using the refrigerant heat exchange component 13 simplifies components such as connection joints, connection pipelines, and seals, which is beneficial to improving the energy density of the battery device 100.

[0118] According to some embodiments of the present application, please refer to Figures 3 - 5 and Figures 7 - 8 , the refrigerant heat exchange component 13 has a flow channel 16 for accommodating a heat exchange medium. In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the flow channel 16 have an overlapping area, and the orthographic projection of the high-voltage heat source 14 and the orthographic projection of the flow channel 16 have an overlapping area.

[0119] In some embodiments, the battery device 100 further includes a support member 1511 that bears the battery cell 12 and the high-voltage heat source 14. The support member 1511 can be any wall portion of the housing 11. For example, the housing 11 includes a lid, an outer frame 1121, and a bottom plate 1122. The outer frame 1121 has a first opening and a second opening that are oppositely arranged. The lid closes the first opening, and the bottom plate 1122 closes the second opening. The support member 1511 can be the lid, the outer frame 1121, or the bottom plate 1122. The refrigerant heat exchange component 13 can be located between the battery cell 12 and the bottom plate 1122, or between the battery cell 12 and the lid. Of course, the refrigerant heat exchange component 13 can directly serve as the support member 1511. In some other embodiments, the refrigerant heat exchange component 13 is connected to the outer frame 1121.

[0120] In some embodiments, the flow channel 16 inside the refrigerant heat exchange component 13 can be arranged in a meandering manner or in a serpentine shape, so that there is a large heat exchange area between the medium and the battery cell 12, and there is a large heat exchange area between the medium and the high-voltage heat source 14.

[0121] The flow channel 16 refers to a part that can accommodate a fluid or a solid-liquid phase change material and allows the fluid or the solid-liquid phase change material to flow. The orthographic projection of the flow channel 16 can refer to the projection of the part that can accommodate a fluid or a solid-liquid phase change material and allows the fluid or the solid-liquid phase change material to flow. For example, when the flow channel 16 is formed by a groove 1321, its orthographic projection is the area defined by the line formed by the side surface of the groove in the projection plane. For example, when the flow channel 16 is formed by the inner cavity of a pipe fitting, its projection can refer to the area defined by the projection of the pipe wall.

[0122] In the above solution, since in the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly overlaps with the orthographic projection of the flow channel 16, and the orthographic projection of the high-voltage heat source 14 overlaps with the orthographic projection of the flow channel 16. On the one hand, since along the thickness direction X of the refrigerant heat exchange component, the flow channels 16 are arranged on one side of the high-voltage heat source 14 and one side of the battery cell 12, it is beneficial to make the heat exchange efficiency between the battery cell 12 and the refrigerant heat exchange component 13 and between the high-voltage heat source 14 and the refrigerant heat exchange component 13 relatively high. On the other hand, the flow channel 16 for exchanging heat with the high-voltage heat source 14 and the flow channel 16 for exchanging heat with the battery cell 12 can share the space of the refrigerant heat exchange component 13, which is beneficial to improving the energy density of the battery device 100.

[0123] According to some embodiments of the present application, please refer to Figures 3 - 8The flow channel 16 includes a plurality of parallel sub-flow channels, at least part of which includes a first flow channel 16 segment and a second flow channel 16 segment. In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the first flow channel 16 segment have an overlapping area, and the orthographic projection of the high-pressure heat source 14 and the orthographic projection of the second flow channel 16 segment have an overlapping area. The first flow channel 16 segment and the second flow channel 16 segment are connected to each other.

[0124] The flow channel 16 includes a plurality of parallel sub-flow channels, at least part of which includes a first flow channel segment 161161 and a second flow channel segment 162162. The first flow channel segment 16 and the second flow channel segment 16 are connected to each other, which means that the first flow channel segment 16 for heat exchange with the battery cell 12 extends to one side of the high-pressure heat source 14 along the thickness direction X of the refrigerant heat exchange component and is connected to the second flow channel segment 16. In other words, the first flow channel segment 16 and the second flow channel segment 16 can be different parts of a single flow channel 16.

[0125] In some embodiments, the area of ​​the overlapping region between the orthographic projection of the battery cell assembly and the orthographic projection of the first flow channel 16 segment is greater than the area of ​​the overlapping region between the orthographic projection of the high-voltage heat source 14 and the orthographic projection of the second flow channel 16 segment. In some embodiments, the battery cell assembly includes a plurality of battery cells 12, and the total area of ​​the overlapping region between the orthographic projection of all battery cells 12 and the orthographic projection of the first flow channel segment 161161 is greater than the area of ​​the overlapping region between the orthographic projection of the high-voltage heat source 14 and the orthographic projection of the second flow channel segment 162162.

[0126] In the above scheme, since the orthographic projection of the battery cell assembly and the orthographic projection of the first flow channel 16 segment have an overlapping area in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source 14 and the orthographic projection of the second flow channel 16 segment have an overlapping area, and the first flow channel 16 segment and the second flow channel 16 segment are connected to each other. The high-pressure heat source 14 and the battery cell 12 can exchange heat through the same flow channel 16, which is conducive to further streamlining the connection joints, connection pipes and seals and other components, and further improving the energy density of the battery device. In addition, the assembly process of the battery device can be simplified and the production efficiency can be improved.

[0127] According to some embodiments of this application, please refer to Figures 3 - 5 The refrigerant heat exchange component 13 includes a first plate body 131 and a second plate body 132 which are stacked. A groove 1321 is formed on a side of the first plate body 131 facing the second plate body 132 . The groove 1321 and the second plate body 132 together form a flow channel 16 .

[0128] In some embodiments, the battery cell 12 is located on a side of the first plate 131 away from the second plate 132 , and the high-voltage heat source 14 is located on a side of the second plate 132 away from the first plate 131 .

[0129] The groove 1321 can be formed by machining, stamping, 3D printing, etc.

[0130] In some embodiments, the refrigerant heat exchange component 13 further includes a joint 133, and the joint 133 is used to convey the heat exchange medium in the flow channel 16. In some other embodiments, the joint 133 is disposed on the side of the second plate body 132 away from the first plate body 131.

[0131] In the above solution, on the one hand, the shape design of the groove 1321 has better flexibility, which can realize the diversification of the flow channel 16 design while controlling the cost, thereby improving the adaptability of the refrigerant heat exchange component 13. On the other hand, compared with the traditional method of constructing the flow channel 16 by arranging pipelines, the method of using the first plate body 131 to cover the notch of the groove 1321 to form the flow channel 16 can effectively reduce the thickness of the refrigerant heat exchange component 13 while keeping the cross-sectional area of the flow channel 16 consistent. Furthermore, the energy density of the battery device 100 is improved.

[0132] According to some embodiments of the present application, please refer to Figures 3 - 5 , both the high-pressure heat source 14 and the battery cell 12 are disposed on the side of the second plate body 132 away from the first plate body 131.

[0133] In some embodiments, both the high-pressure heat source 14 and the battery cell 12 are connected to the first plate body 131. Since the groove 1321 is disposed on the side of the first plate body 131 facing the second plate body 132, the risk of stress concentration in the second plate body 132 is relatively low. Disposing both the high-pressure heat source 14 and the battery cell 12 on the side of the second plate body 132 away from the first plate body 131 can make the battery cell 12 and the high-pressure heat source 14 have higher structural stability.

[0134] In the above solution, the high-pressure heat source 14 and the battery cell 12 can share some space, which is beneficial to improving the energy density of the battery device 100.

[0135] According to some embodiments of the present application, please refer to Figures 3 - 5 , the battery device 100 further includes a heat spreader 15, and the heat spreader 15 is disposed between the high-pressure heat source 14 and the refrigerant heat exchange component 13. The heat spreader 15 is used to transfer the heat of the high-pressure heat source 14 to the refrigerant heat exchange component 13. Among them, in the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source 14 is located within the orthographic projection of the heat spreader 15.

[0136] In some embodiments, the heat spreader 15 can be directly in contact with the surface of the refrigerant heat exchange component 13 and the surface of the high-pressure heat source 14.

[0137] In some embodiments, the material of the heat pipe 15 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0138] In some embodiments, the material of the heat pipe 15 can be plastic.

[0139] In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source 14 is located within the orthographic projection of the heat pipe 15. This means that the heat of the high-pressure heat source 14 will pass through the heat pipe 15 during the process of transferring heat to the refrigerant heat exchange component 13.

[0140] In the above solution, during the heat exchange process between the high-pressure heat source 14 and the refrigerant heat exchange component 13, the heat pipe 15 can quickly spread the heat, improve the heat exchange uniformity of the high-pressure heat source 14, and can extend the service life of the high-pressure heat source 14.

[0141] According to some embodiments of the present application, please refer to Figures 3 - 8 , in the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the area of the orthographic projection of the heat pipe 15 is larger than the area of the orthographic projection of the high-pressure heat source 14.

[0142] In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the area of the orthographic projection of the heat pipe 15 is larger than the area of the orthographic projection of the high-pressure heat source 14. This means that the heat generated by the high-pressure heat source 14, which was originally concentrated in a small area, can be dispersed to the larger-area heat pipe 15.

[0143] In the above solution, since in the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the area of the orthographic projection of the heat pipe 15 is larger than the area of the orthographic projection of the high-pressure heat source 14. During the heat exchange process of the high-pressure heat source 14, the high heat flux density originally concentrated in a small area can be dispersed to a larger area, further improving the heat exchange uniformity of the high-pressure heat source 14.

[0144] According to some embodiments of the present application, please refer to Figures 3 - 8 , the refrigerant heat exchange component 13 has a first region 134 and a second region 135. The battery cell assembly is arranged in the first region 134, and the heat pipe 15 is arranged in the second region 135. The first region 134 and the second region 135 are integrally formed.

[0145] In some embodiments, the battery cell assembly and the heat pipe 15 are arranged along a first direction. The refrigerant heat exchange component 13 has a medium inlet and a medium outlet. Both the medium inlet and the medium outlet are arranged in the first region 134, and the medium inlet and the medium outlet are arranged on the side of the battery cell assembly away from the heat pipe 15 along the first direction. Such an arrangement can provide a relatively large assembly space when the medium inlet and the medium outlet are assembled with the pipeline or the joint 133.

[0146] In some embodiments, taking the refrigerant heat exchange component 13 as a plate member as an example, the first region 134 and the second region 135 are integrally formed, which means that the refrigerant heat exchange component 13 can be a single plate member.

[0147] In the above solution, the refrigerant heat exchange component 13 for heat exchange with the battery cell 12 and the high-voltage heat source 14 can be processed simultaneously through one processing, which is beneficial to improving the production efficiency of the battery device 100. At the same time, the refrigerant heat exchange component 13 can also have high structural stability.

[0148] According to some embodiments of the present application, please refer to Figures 3 - 8 , the refrigerant heat exchange component 13 has a flow channel 16 for accommodating a heat exchange medium. A part of the flow channel 16 is located in the second region 135. In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the heat pipe 15 covers the orthographic projection of the flow channel 16 in the second region 135.

[0149] In some embodiments, the flow channel 16 includes a first part and a second part. The first part is located in the first region 134, and the second part is located in the second region 135. The first part is communicated with the second part. Of course, in some other embodiments, the first part and the second part can also be independent of each other. In some other embodiments, the heat exchange area of the first part is larger than that of the second part.

[0150] In the above solution, since in the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the heat pipe 15 covers the orthographic projection of the flow channel 16 in the second region 135, the heat diffused through the heat pipe 15 can more efficiently exchange heat with the heat exchange medium in the flow channel 16, improving the heat exchange efficiency between the high-voltage heat source 14 and the refrigerant heat exchange component 13.

[0151] According to some embodiments of the present application, please refer to Figures 3 - 8 , the heat pipe 15 and the refrigerant heat exchange component 13 are integrally formed.

[0152] In the above solution, the integral formation of the heat pipe 15 and the refrigerant heat exchange component 13 can reduce the seams or connection points between the two, reduce the risk of stress concentration between the two, and improve the connection stability between the two.

[0153] According to some embodiments of the present application, please refer to Figures 3 - 8 , the heat pipe 15 and the refrigerant heat exchange component 13 are separately formed.

[0154] In the above solution, separately forming the heat pipe 15 and the refrigerant heat exchange component 13 is easier to control the processing accuracy of the two, which is beneficial to improving the reliability of the two. At the same time, the maintenance cost of the heat pipe 15 and the refrigerant heat exchange component 13 can also be reduced.

[0155] According to some embodiments of the present application, please refer to Figures 3 - 8 , the heat pipe 15 is bonded or welded to the refrigerant heat exchange component 13.

[0156] In some embodiments, the heat pipe 15 is bonded to the refrigerant heat exchange component 13 with a thermal conductive adhesive.

[0157] In some embodiments, the heat pipe 15 and the refrigerant heat exchange component 13 can be connected by fusion welding methods such as laser welding and gas shielded welding. Of course, they can also be connected by soldering or other methods.

[0158] In the above solution, connecting the heat pipe 15 and the refrigerant heat exchange component 13 by bonding or welding can effectively improve the assembly efficiency.

[0159] According to some embodiments of the present application, please refer to Figures 3 - 8 , the heat pipe 15 includes a housing 151, a capillary structure 159, and a first phase change material. The capillary structure 159 and the first phase change material are both disposed inside the housing 151.

[0160] The presence of the capillary structure 159 can increase the inner surface area of the housing 151, increase the contact area between the liquid and the housing 151, and improve the heat transfer efficiency through capillary action.

[0161] In some embodiments, the capillary structure 159 can be convex or concave portions etched on the inner surface of the housing 151.

[0162] In some embodiments, the capillary structure 159 can be a porous core material disposed inside the housing 151.

[0163] In some embodiments, the capillary structure 159 can be a mesh structure member disposed inside the housing 151.

[0164] In the above solution, by the cooperation of the capillary structure 159 and the first phase change material, the first phase change material can circulate and move inside the housing 151 with a higher efficiency, forming a cold and hot cycle, reducing the risk of heat concentration, and improving the reliability of the heat pipe 15.

[0165] According to some embodiments of the present application, please refer to Figures 3 - 8 , a partition wall 152 is disposed inside the housing 151. The partition wall 152 divides the space inside the housing 151 into a first chamber 153 and a second chamber 154. The capillary structure 159 and the first phase change material are both disposed in the first chamber 153, and a second phase change material is disposed in the second chamber 154.

[0166] In some embodiments, the material of the housing 151 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0167] In some embodiments, the material of the partition wall 152 may be a metal. For example, it may include, but is not limited to, aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0168] In some embodiments, the first phase change material is a gas-liquid phase change material, and the second phase change material is a solid-liquid phase change material.

[0169] In some embodiments, the first chamber 153 is closer to the high-pressure heat source 14 than the second chamber 154. Taking the first phase change material as a gas-liquid phase change material and the second phase change material as a solid-liquid phase change material as an example. When there is a temperature difference region in the heat pipe 15, the phase change material in the high-temperature region quickly changes from a liquid state to a gaseous state, and the volume expands rapidly, pushing the phase change material to circulate and move inside the first chamber 153, thereby transporting the heat in the high-temperature region to the low-temperature region. After the high-temperature refrigerant operates to the low-temperature region, it releases heat and condenses into a liquid refrigerant, and the liquid refrigerant is transported to the high-temperature region under the action of capillary force, forming a heat and cold cycle, thereby achieving the temperature equalization effect. When the gas-liquid phase change material transfers the heat generated by the high-pressure heat source 14 to the second chamber 154, the solid-liquid phase change material melts into a liquid state, absorbs heat, and stores the heat generated by the high-pressure heat source 14 in the second chamber 154. The stored heat can be transferred through the refrigerant heat exchange component 13. Such a setting can cope with complex working conditions such as a large deviation between the heat exchange temperature required by the battery cell 12 and the heat exchange temperature required by the high-pressure heat source 14. In other words, the above setting can still make the battery device 100 have high reliability under complex working conditions.

[0170] In the above solution, one of the first phase change material and the second phase change material can achieve the effect of temperature equalization, and the other can play the role of storing heat. The high-pressure heat source 14 exchanges heat with the refrigerant heat exchange component 13 through the heat pipe 15 set above, which can reduce the risk of uneven heat distribution in the battery device 100 caused by a large deviation between the heat exchange efficiency of the battery cell 12 and the refrigerant heat exchange component 13 and the heat exchange efficiency of the high-pressure heat source 14 and the refrigerant heat exchange component 13, and improve the reliability of the refrigerant heat exchange component 13 and the battery device 100.

[0171] According to some embodiments of the present application, the first phase change material is one of 1,1,1,2-tetrafluoroethane, difluoromethane, 1,1,1,2,2-pentafluoroethane, propane, and carbon dioxide.

[0172] 1,1,1,2-tetrafluoroethane, difluoromethane, 1,1,1,2,2-pentafluoroethane, propane, carbon dioxide, etc. can be called gas-liquid phase change materials.

[0173] According to some embodiments of the present application, the second phase change material is one of n-octadecane, paraffin, graphite, calcium chloride hexahydrate, and sodium sulfate decahydrate.

[0174] The second phase change material includes n-octadecane, paraffin, graphite, calcium chloride hexahydrate, sodium sulfate decahydrate, etc. can be called solid-liquid phase change materials.

[0175] According to some embodiments of the present application, the first cavity 153 and the second cavity 154 are arranged along the thickness direction X of the refrigerant heat exchange component, and the first cavity 153 is closer to the high-pressure heat source 14 than the second cavity 154.

[0176] In some embodiments, the thickness direction X of the refrigerant heat exchange component is parallel to the direction of gravity.

[0177] In some embodiments, taking the electrical device as the vehicle 1000 as an example, the thickness direction X of the refrigerant heat exchange component can be the front-back direction or the left-right direction.

[0178] In the above solution, the first cavity 153 and the second cavity 154 are arranged based on the thickness direction X of the refrigerant heat exchange component, which reduces the design and assembly difficulty of the heat pipe 15.

[0179] According to some embodiments of the present application, please refer to Figures 3 - 10 , the housing 151 includes a first wall 155 and a second wall 156 that are oppositely arranged along the thickness direction X of the refrigerant heat exchange component, and the partition wall 152 is arranged between the first wall 155 and the second wall 156. A first cavity 153 is formed between the first wall 155 and the partition wall 152, and a second cavity 154 is formed between the second wall 156 and the partition wall 152. The heat pipe 15 further includes a heat conducting member 1510, and the heat conducting member 1510 is arranged in the second cavity 154, and the heat conducting member 1510 connects the partition wall 152 and the second wall 156.

[0180] In some embodiments, the housing 151 further includes a first frame 157 and a second frame 158. Both the first frame 157 and the second frame 158 surround the periphery of the partition wall 152. The first wall 155, the partition wall 152 and the first frame 157 jointly define the first cavity 153. The second wall 156, the partition wall 152 and the second frame 158 jointly define the second cavity 154. In some other embodiments, the first wall 155 and the first frame 157 are integrally formed, or the partition wall 152 and the first frame 157 are integrally formed. In some other embodiments, the second wall 156 and the second frame 158 are integrally formed, or the partition wall 152 and the second frame 158 are integrally formed.

[0181] In some embodiments, the material of the first wall 155 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0182] In some embodiments, the material of the second wall 156 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0183] In some embodiments, the material of the heat conducting member 1510 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0184] In the above solution, the heat conducting member 1510 can improve the heat exchange efficiency between the first phase change material and the second phase change material. At the same time, since the heat conducting member 1510 is connected to the partition wall 152 and the second wall 156, the arrangement of the heat conducting member 1510 can also make the shape of the second cavity 154 stable and reliable.

[0185] According to some embodiments of the present application, please refer to Figures 3 - 11 , the housing 151 includes a first wall 155 and a second wall 156 oppositely arranged along the thickness direction X of the refrigerant heat exchange member. The partition wall 152 is arranged between the first wall 155 and the second wall 156. A first cavity 153 is formed between the first wall 155 and the partition wall 152, and a second cavity 154 is formed between the second wall 156 and the partition wall 152. The heat pipe 15 further includes a support member 1511, and the support member 1511 is arranged in the first cavity 153. The support member 1511 is connected to the first wall 155 and the partition wall 152.

[0186] In some embodiments, the material of the support member 1511 can be metal. For example, it can include but is not limited to aluminum, aluminum alloy, copper, magnesium alloy, steel, etc.

[0187] In the above solution, since the support member 1511 is connected to the first wall 155 and the partition wall 152, the arrangement of the support member 1511 can also make the shape of the first cavity 153 stable and reliable.

[0188] According to some embodiments of the present application, please refer to Figures 3 - 11 , a plurality of support members 1511 are provided, and the plurality of support members 1511 are arranged in an array.

[0189] The plurality of support members 1511 can be arranged in a circular array, and of course, they can also be arranged in a matrix.

[0190] In the above solution, the plurality of support members 1511 arranged in an array can further improve the stability of the first cavity 153.

[0191] According to some embodiments of the present application, please refer to Figures 3 - 11 , the refrigerant heat exchange member 13 is a direct cooling plate.

[0192] In some embodiments, the direct cooling plate is connected to the thermal management system of the electrical device. Taking the electrical device as the vehicle 1000 as an example, the direct cooling plate can be connected to the air conditioning system of the vehicle 1000, or can be connected to the heat exchange system of the refrigerator of the vehicle 1000, etc.

[0193] In some embodiments, the heat exchange medium of the direct cooling plate is a phase change material.

[0194] In the above solution, the direct cooling plate has a high heat conduction efficiency, which is beneficial to improving the reliability of the battery device 100.

[0195] According to some embodiments of the present application, the refrigerant heat exchange component 13 bears the battery cell assembly.

[0196] The refrigerant heat exchange component 13 bearing the battery cell assembly means that the battery cell assembly can be fixed to the support plate, and the weight of the battery cell assembly can be borne by the support plate.

[0197] In the above solution, the refrigerant heat exchange component 13 having both the structural bearing and thermal management dual functions in the battery device 100 can make the layout of the battery device 100 more compact, thereby improving the overall energy density.

[0198] According to some embodiments of the present application, the high-pressure heat source 14 includes a housing and high-pressure devices. The high-pressure devices are disposed in the housing and connected to the housing, and the housing is thermally connected to the refrigerant heat exchange component 13.

[0199] The high-pressure devices and the housing can be collectively referred to as a high-pressure box or an electronic control module, etc.

[0200] In some embodiments, the connection between the high-pressure devices and the housing can be achieved by bonding with a thermal conductive adhesive. Of course, it can also be achieved by welding or by using a heat sink with a high thermal conductivity through fasteners to connect the two.

[0201] In the above solution, by disposing the high-pressure devices in the housing and thermally connecting the housing to the refrigerant heat exchange component 13, the assembly efficiency between the high-pressure heat source 14 and the refrigerant heat exchange component can be improved due to the presence of the housing, and the assembly difficulty between the high-pressure heat source 14 and the refrigerant heat exchange component 13 can be reduced.

[0202] According to some embodiments of the present application, the high-pressure heat source 14 includes high-pressure devices, and the high-pressure devices are thermally connected to the refrigerant heat exchange component 13.

[0203] In some embodiments, the connection between the high-pressure devices and the refrigerant heat exchange component 13 can be achieved by bonding with a thermal conductive adhesive. Of course, it can also be achieved by welding or by using a heat sink with a high thermal conductivity through fasteners to connect the two.

[0204] In the above solution, the thermal connection between the high-pressure devices and the refrigerant heat exchange component 13 is beneficial to achieving a high heat exchange efficiency between the high-pressure devices and the refrigerant heat exchange component 13.

[0205] According to some embodiments of the present application, the high-pressure devices include at least one of a relay, an insulated gate bipolar transistor, a fuse, and a bus bar.

[0206] A relay is an electromagnetic switch device that controls a large current through a small current.

[0207] An insulated gate bipolar transistor is also known as an IGBT (Insulated Gate Bipolar Transistor).

[0208] The bar piece can be understood as a conductive part, which can be used to electrically connect different high-voltage devices. Of course, the bar piece can also be used to electrically connect the battery cell 12 and the high-voltage device.

[0209] A fuse is a circuit protection device that cuts off the circuit by melting the fuse under overcurrent.

[0210] In some embodiments, the bar sheet may be a copper bar.

[0211] According to some embodiments of the present application, referring to Figure 1 The present application provides an electrical device, which includes the battery device 100 in one or more of the above embodiments, and the battery device 100 is used to provide electrical energy.

[0212] In the above solutions, since the battery device 100 in one or more of the above embodiments has high reliability, the electrical device including the battery device 100 in one or more of the above embodiments also has high reliability.

[0213] According to some embodiments of the present application, referring to Figures 3 - 11 The present application provides a battery device 100, which includes a battery cell assembly, a high-voltage heat source 14, a temperature averaging plate 15, and a refrigerant heat exchange component 13. The battery cell assembly includes a plurality of battery cells 12. The high-voltage heat source 14 is electrically connected to the battery cell assembly. The battery cells 12 and the high-voltage heat source 14 are both thermally connected to the refrigerant heat exchange component 13. The refrigerant heat exchange component 13 is used to adjust the temperature of the battery cells 12 and the high-voltage heat source 14. The refrigerant heat exchange component 13 has a flow channel 16 for accommodating a heat exchange medium. In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the flow channel 16 have an overlapping area, and the orthographic projection of the high-voltage heat source 14 and the orthographic projection of the flow channel 16 have an overlapping area.

[0214] The refrigerant heat exchange component 13 includes a first plate 131 and a second plate 132 which are stacked. A groove 1321 is formed on the side of the first plate 131 facing the second plate 132. The groove 1321 and the second plate 132 together form a flow channel 16. The high-pressure heat source 14 and the battery cell 12 are both arranged on the side of the second plate 132 away from the first plate 131.

[0215] The heat pipe 15 is disposed between the high-pressure heat source 14 and the refrigerant heat exchange component 13, and the heat pipe 15 is used to transfer the heat of the high-pressure heat source 14 to the refrigerant heat exchange component 13. Among them, in the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source 14 is located within the orthographic projection of the heat pipe 15. In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the area of the orthographic projection of the heat pipe 15 is larger than the area of the orthographic projection of the high-pressure heat source 14. The refrigerant heat exchange component 13 has a first region 134 and a second region 135. The battery cell assembly is disposed in the first region 134, and the heat pipe 15 is disposed in the second region 135. The first region 134 and the second region 135 are integrally formed. The refrigerant heat exchange component 13 has a flow channel 16 for accommodating a heat exchange medium. A part of the flow channel 16 is located in the second region 135. In the same projection plane perpendicular to the thickness direction X of the refrigerant heat exchange component, the orthographic projection of the heat pipe 15 covers the orthographic projection of the flow channel 16 in the second region 135.

[0216] The heat pipe 15 and the refrigerant heat exchange component 13 are separately formed. The heat pipe 15 includes a housing 151, a capillary structure 159, and a first phase change material. The capillary structure 159 and the first phase change material are both disposed within the housing 151. A partition wall 152 is disposed within the housing 151. The partition wall 152 divides the space within the housing 151 into a first chamber 153 and a second chamber 154. The capillary structure 159 and the first phase change material are both disposed in the first chamber 153, and a second phase change material is disposed in the second chamber 154. The first chamber 153 and the second chamber 154 are arranged along the thickness direction X of the refrigerant heat exchange component. The first chamber 153 is closer to the high-pressure heat source 14 than the second chamber 154. The housing 151 includes a first wall 155 and a second wall 156 that are oppositely disposed along the thickness direction X of the refrigerant heat exchange component. The partition wall 152 is disposed between the first wall 155 and the second wall 156. The first chamber 153 is formed between the first wall 155 and the partition wall 152, and the second chamber 154 is formed between the second wall 156 and the partition wall 152. The heat pipe 15 further includes a heat conducting member 1510. The heat conducting member 1510 is disposed in the second chamber 154, and the heat conducting member 1510 connects the partition wall 152 and the second wall 156.

[0217] The housing 151 includes a first wall 155 and a second wall 156 that are oppositely disposed along the thickness direction X of the refrigerant heat exchange component. The partition wall 152 is disposed between the first wall 155 and the second wall 156. The first chamber 153 is formed between the first wall 155 and the partition wall 152, and the second chamber 154 is formed between the second wall 156 and the partition wall 152. The heat pipe 15 further includes a support member 1511. The support member 1511 is disposed in the first chamber 153, and the support member 1511 connects the first wall 155 and the partition wall 152. A plurality of support members 1511 are provided, and the plurality of support members 1511 are arranged in an array. The refrigerant heat exchange component 13 is a direct cooling plate. The refrigerant heat exchange component 13 carries the battery cell assembly.

[0218] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be covered within the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that: include: A battery cell assembly, comprising a plurality of battery cells; a high voltage heat source electrically connected to the battery cell assembly; A refrigerant heat exchange component, wherein a refrigerant conduction channel for conducting refrigerant is provided inside the refrigerant heat exchange component; the battery cell and the high-voltage heat source are both thermally connected to the refrigerant heat exchange component, and the refrigerant heat exchange component is configured to adjust the temperature of the battery cell and the high-voltage heat source.

2. The battery device according to claim 1, characterized in that: The refrigerant heat exchange component has a flow channel for accommodating a heat exchange medium. In the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the flow channel have an overlapping area, and the orthographic projection of the high-pressure heat source and the orthographic projection of the flow channel have an overlapping area.

3. The battery device according to claim 2, characterized in that: The flow channel includes a plurality of parallel sub-flow channels, at least part of which includes a first flow channel segment and a second flow channel segment, and in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the battery cell assembly and the orthographic projection of the first flow channel segment have an overlapping area, and the orthographic projection of the high-pressure heat source and the orthographic projection of the second flow channel segment have an overlapping area; The first flow channel section and the second flow channel section are communicated with each other.

4. The battery device according to claim 2, characterized in that: The refrigerant heat exchange component includes a first plate body and a second plate body which are stacked. A groove is formed on a side of the first plate body facing the second plate body. The groove and the second plate body together form the flow channel.

5. The battery device according to claim 4, characterized in that: The high-voltage heat source and the battery cell are both arranged on a side of the second plate body away from the first plate body.

6. The battery device according to claim 1, characterized in that: The battery device further comprises: A temperature averaging plate, disposed between the high-pressure heat source and the refrigerant heat exchange component, the temperature averaging plate being used to transfer heat from the high-pressure heat source to the refrigerant heat exchange component; Wherein, in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the high-pressure heat source is located within the orthographic projection of the temperature homogenizing plate.

7. The battery device according to claim 6, characterized in that: In the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the area of ​​the orthographic projection of the temperature equalizing plate is larger than the area of ​​the orthographic projection of the high-pressure heat source.

8. The battery device according to claim 6, characterized in that: The refrigerant heat exchange component has a first area and a second area, the battery cell assembly is arranged in the first area, the temperature balancing plate is arranged in the second area, and the first area and the second area are integrally formed.

9. The battery device according to claim 8, characterized in that: The refrigerant heat exchange component has a flow channel for accommodating a heat exchange medium, a portion of the flow channel is located in the second region, and in the same projection plane perpendicular to the thickness direction of the refrigerant heat exchange component, the orthographic projection of the temperature equalizing plate covers the orthographic projection of the flow channel in the second region.

10. The battery device according to claim 6, characterized in that: The temperature averaging plate and the refrigerant heat exchange component are integrally formed.

11. The battery device according to claim 6, characterized in that: The temperature equalizing plate and the refrigerant heat exchange component are formed separately.

12. The battery device according to claim 11, characterized in that: The temperature averaging plate is bonded or welded to the refrigerant heat exchange component.

13. The battery device according to claim 6, characterized in that: The temperature homogenizing plate comprises a shell, a capillary structure and a first phase change material, wherein the capillary structure and the first phase change material are both arranged in the shell.

14. The battery device according to claim 13, characterized in that: A partition wall is disposed in the shell, and the partition wall divides the space in the shell into a first cavity and a second cavity. The capillary structure and the first phase change material are both disposed in the first cavity, and the second cavity is provided with a second phase change material.

15. The battery device according to claim 14, characterized in that: The first phase change material is one of tetrafluoroethane, difluoromethane, pentafluoroethane, propane, and carbon dioxide.

16. The battery device according to claim 14, characterized in that: The second phase change material is one of n-octadecane, paraffin, graphite, calcium chloride hexahydrate, and sodium sulfate decahydrate.

17. The battery device according to claim 14, characterized in that: The first cavity and the second cavity are arranged along the thickness direction of the refrigerant heat exchange component, and the first cavity is closer to the high-pressure heat source than the second cavity.

18. The battery device according to claim 14, characterized in that: The housing comprises a first wall and a second wall which are arranged opposite to each other along the thickness direction of the refrigerant heat exchange component, the partition wall is arranged between the first wall and the second wall, the first cavity is formed between the first wall and the partition wall, and the second cavity is formed between the second wall and the partition wall; The temperature homogenizing plate further includes a heat conducting member, which is disposed in the second cavity and connects the partition wall and the second wall.

19. The battery device according to claim 14, characterized in that: The housing comprises a first wall and a second wall which are arranged opposite to each other along the thickness direction of the refrigerant heat exchange component, the partition wall is arranged between the first wall and the second wall, the first cavity is formed between the first wall and the partition wall, and the second cavity is formed between the second wall and the partition wall; The temperature homogenizing plate further includes a support member, which is disposed in the first cavity and connects the first wall and the partition wall.

20. The battery device according to claim 19, characterized in that A plurality of the support members are provided, and the plurality of the support members are distributed in an array.

21. The battery device according to claim 1, characterized in that The refrigerant heat exchange component is a direct cooling plate.

22. The battery device according to claim 1, characterized in that The refrigerant heat exchange component carries the battery monomer assembly.

23. The battery device according to claim 1, characterized in that The high-pressure heat source includes a shell and a high-pressure device. The high-pressure device is arranged in the shell and connected to the shell. The shell is thermally connected to the refrigerant heat exchange component.

24. The battery device according to claim 1, characterized in that The high-pressure heat source includes a high-pressure device, and the high-pressure device is thermally connected to the refrigerant heat exchange component.

25. The battery device according to claim 23 or 24, characterized in that: The high voltage device includes at least one of a relay, an insulated gate bipolar transistor, a fuse, and a busbar.

26. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 25, wherein the battery device is used to provide electrical energy.

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