Battery devices, heat exchange components and electrical equipment

Abstract

This application provides a battery device, a heat exchange assembly, and an electrical device. The battery device includes a housing, individual battery cells, and a heat exchange assembly. The housing has a receiving cavity, within which the individual battery cells are disposed. The heat exchange assembly includes a heat exchange body, a heat exchange connector, and a heating element. The heat exchange body has multiple chambers, wherein at least one chamber forms a flow channel cavity, and at least one chamber forms a mounting cavity. The heat exchange connector communicates with the flow channel cavity to conduct a heat exchange medium into the flow channel cavity. The heat exchange medium is used to exchange heat with the individual battery cells. The heating element is disposed within the mounting cavity and is used to heat the individual battery cells. The heat exchange body has a heat exchange wall that contacts the individual battery cells and forms the cavity wall of both the mounting cavity and the flow channel cavity. The battery device, heat exchange assembly, and electrical device of this application can improve the heating effect on individual battery cells while balancing cost and thermal management reliability.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery device, heat exchange component, and electrical equipment. Background Technology

[0002] Battery devices can be used to store or provide electrical energy, and they can be used in electrical equipment, such as vehicles. Taking vehicles as an example, in a vehicle equipped with a battery device, the battery device can provide all or part of the power.

[0003] In related technologies, during the use of a battery device, the temperature of the individual battery cells will rise, and it is necessary to control the temperature of the individual battery cells. Otherwise, it may have an adverse effect on the performance and service life of the battery device. To this end, related technologies set up heat exchange components in the battery device and introduce heat exchange medium into the heat exchange components. The heat exchange medium can provide a good cooling effect for the individual battery cells, but the heating effect is limited. Utility Model Content

[0004] This application provides a battery device, heat exchange component, and electrical equipment that can improve the heating effect of individual battery cells while taking into account cost and thermal management reliability.

[0005] A first aspect of this application provides a battery device, comprising: a housing having a receiving cavity; a battery cell disposed within the receiving cavity; and a heat exchange assembly including a heat exchange body, a heat exchange connector, and a heating element. The heat exchange body has a plurality of chambers, wherein at least one of the chambers is formed as a flow channel cavity, and at least one of the chambers is formed as a mounting cavity. The heat exchange connector communicates with the flow channel cavity to conduct a heat exchange medium into the flow channel cavity. The heat exchange medium is used to exchange heat with the battery cell. The heating element is disposed within the mounting cavity and is used to heat the battery cell. The heat exchange body has a heat exchange wall that is in contact with the battery cell and is formed as the cavity wall of the mounting cavity and the flow channel cavity.

[0006] In the battery device of this application embodiment, the heat exchange component is both a conductor of heat exchange medium and has an independent heating element. This allows for improved heating of the battery cells while maintaining cooling performance. Furthermore, the heating element is disposed within a cavity of the heat exchange body where no cooling medium is introduced. Compared to related technologies where a separate groove is cut for the heating structure, this reduces the processing cost of the heat exchange body and improves its structural integrity. Moreover, the heat exchange wall of the heat exchange body simultaneously forms the cavity walls of both the mounting cavity and the flow channel cavity. This allows both the heat exchange medium in the flow channel cavity and the heating element in the mounting cavity to efficiently exchange heat with the battery cells through the heat exchange wall, achieving a better heat exchange effect. In summary, the battery device of this application embodiment improves the heating effect of the battery cells while balancing cost and thermal management reliability.

[0007] In some embodiments, the plurality of chambers are arranged side by side, and along the arrangement direction of the plurality of chambers, at least one of the mounting chambers is disposed between two adjacent flow channel chambers, and / or, at least one of the flow channel chambers is disposed between two adjacent mounting chambers.

[0008] In this embodiment, this arrangement allows the mounting cavity and flow channel cavity to be relatively evenly distributed in the heat exchange body. As a result, whether the heat exchange medium is used to exchange heat with the battery cell or the heating element is used to heat the battery cell, the heat exchange body can maintain relatively good temperature uniformity, which helps to improve the temperature consistency of each location of the battery cell.

[0009] In some embodiments, the plurality of chambers are arranged side by side, and at least one of the two chambers located at both ends along the arrangement direction of the plurality of chambers is formed as the mounting cavity.

[0010] It is understood that in actual use, the heating element needs to be connected to an external circuit to achieve power supply and / or control. In this embodiment, the chamber at at least one end of the heat exchange body is set as the mounting cavity. It is understood that this position is usually close to the edge of the box. Setting the mounting cavity here helps to reduce the possibility of interference between the wiring harness used when the heating element is connected to the external wiring harness and the battery cell or other structures in the box, thereby reducing the difficulty of wiring.

[0011] In some embodiments, the heat exchange body includes a housing and a partition disposed within the housing, the partition dividing the internal space of the housing into a plurality of chambers.

[0012] In this embodiment, the internal space of the shell is divided into multiple chambers by means of a partition. This helps to further reduce manufacturing costs, and the partition does not damage the integrity of the shell's own structure, thereby helping to further improve the structural strength of the heat exchanger and thus improve the reliability of thermal management.

[0013] In some embodiments, at least one sidewall of the housing along a first direction is formed as a heat exchange wall, the plurality of chambers are arranged side by side along a second direction, each of the chambers extends along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0014] In this embodiment, this arrangement helps to further reduce the manufacturing difficulty and cost of the heat exchanger body. For example, in embodiments where the shell and partition are formed as an integral injection molded part or an integral metal part, this arrangement can significantly reduce the demolding difficulty and mold manufacturing cost.

[0015] In some embodiments, the thickness direction of the partition is perpendicular to the third direction and intersects both the first and second directions; and / or the number of flow channel cavities is multiple, and the heat exchange assembly includes a collector that connects the heat exchange joint to the multiple flow channel cavities.

[0016] The inclined arrangement of the baffle helps to improve the stress distribution of the baffle when the shell is subjected to a force along the first direction, thereby enhancing the compressive strength of the heat exchanger body. Furthermore, in embodiments where the shell and baffle are configured as elastic structures (e.g., injection-molded structures), the deformation adaptability of the heat exchanger body can be improved. The current collector connecting the heat exchange joints to multiple flow channel cavities can significantly reduce the number of heat exchange joints required, thereby reducing the assembly difficulty of the heat exchange assembly.

[0017] In some embodiments, the heating element includes a heating plate, the thickness direction of which is perpendicular to the third direction and intersects both the first and second directions.

[0018] In this embodiment, the heating element is further tilted, which improves the utilization rate of the space in the mounting cavity and increases the effective heating area of ​​the heating element without increasing the volume of the mounting cavity, thereby further improving the heating effect.

[0019] In some embodiments, the heating element includes at least two main body segments and at least one transition segment, wherein the at least two main body segments are respectively disposed in different mounting cavities, and the transition segment is located outside the mounting cavity and electrically connects the plurality of main body segments disposed in different mounting cavities.

[0020] In this embodiment, multiple main body sections located in different mounting cavities are electrically connected by an adapter section. In this way, multiple main body sections can be connected to the external circuit at the same time, which significantly reduces the wiring difficulty of the heating element.

[0021] In some embodiments, the outer surface of the heat exchange body is recessed to form at least one wiring groove, the wiring groove is in communication with at least two of the mounting cavities, and the transition section is disposed in the wiring groove.

[0022] In this embodiment, by placing the transition section inside the wiring trough, the transition section can be protected, the probability of wear on the transition section can be reduced, and the service life and reliability of the heat exchange component can be improved.

[0023] In some embodiments, at least one sidewall of the heat exchange body is formed as the heat exchange wall along a first direction, the side surface of the heat exchange wall facing the battery cell is a heat exchange surface, the wiring groove is formed on the heat exchange surface, and along the first direction, the surface of the transition section is flush with or lower than the heat exchange surface.

[0024] In this embodiment, the wiring groove is further disposed on the heat exchange surface. It can be understood that the heat exchange surface is disposed facing the battery cell, and the surface of the battery cell is usually relatively flat. Therefore, disposing of the wiring groove here helps to further reduce the wear probability of the transition section. Furthermore, the surface of the transition section does not protrude from the heat exchange surface, so that the contact between the heat exchange surface and the battery cell can be closer, ensuring the heat exchange effect.

[0025] In some embodiments, the heat exchange body has a wiring hole communicating with the mounting cavity, and the heating element has a wiring terminal, which is connected to the wiring hole.

[0026] In this embodiment, wiring holes are provided on the heat exchange body to realize the wiring of the heating element, which helps to further reduce the difficulty of wiring.

[0027] In some embodiments, the heating element includes a heating wire, and / or the heating element includes a heating plate.

[0028] In this embodiment, configuring the heating element to include a heating wire helps reduce the difficulty of assembling the heating element into the mounting cavity and lowers costs. Configuring the heating element to include a heating plate helps improve heating efficiency and safety.

[0029] In some embodiments, the battery device further includes a heat-conducting structure disposed within the mounting cavity.

[0030] This helps improve the heat exchange efficiency between the heating element and the battery cells.

[0031] In some embodiments, the battery device includes a plurality of battery cells distributed along a first direction, and the heat exchange assembly is disposed between adjacent battery cells and / or between the battery cells and the housing along the first direction.

[0032] In this embodiment, this arrangement helps to increase the effective contact area between the heat exchange component and the battery cell, thereby improving the thermal management effect.

[0033] A second aspect of this application provides a heat exchange assembly, including: a heat exchange body, a heat exchange connector, and a heating element. The heat exchange body has multiple chambers, wherein at least one chamber is formed as a flow channel cavity, and at least one chamber is formed as a mounting cavity. The heat exchange connector communicates with the flow channel cavity to conduct a heat exchange medium into the flow channel cavity. The heat exchange medium is used to exchange heat with the battery cell. The heating element is disposed in the mounting cavity and is used to heat the battery cell. The heat exchange body has a heat exchange wall for contacting the battery cell, and the heat exchange wall is formed as the cavity wall of the mounting cavity and the flow channel cavity.

[0034] A third aspect of this application provides an electrical device, including the battery device described in the first aspect of this application, and / or the heat exchange component described in the second aspect of this application.

[0035] The heat exchange components and electrical devices of the embodiments of this application have all the advantages of the battery devices described in any of the above embodiments, and will not be repeated here. Attached Figure Description

[0036] Figure 1 This is a schematic diagram of the structure of the electrical equipment according to an embodiment of this application;

[0037] Figure 2 This is an exploded perspective view of the battery device according to an embodiment of this application;

[0038] Figure 3 This is a schematic diagram of the structure of a heat exchange component according to an embodiment of this application;

[0039] Figure 4 yes Figure 3 Schematic diagram of the AA section of the heat exchange component;

[0040] Figure 5 yes Figure 3 3D exploded view of the heat exchange component;

[0041] Figure 6 yes Figure 5 A magnified view of part B in the middle section;

[0042] Figure 7 This is a schematic diagram of the structure of a heat exchange component according to another embodiment of this application;

[0043] Figure 8 yes Figure 7 Schematic diagram of the CC section of the heat exchange component;

[0044] Figure 9 yes Figure 7 A magnified view of part D in the middle;

[0045] Figure 10 yes Figure 7 3D exploded view of the heat exchange component;

[0046] Figure 11 yes Figure 10 A magnified view of part E in the middle.

[0047] Explanation of reference numerals in the attached figures

[0048] 1000, Vehicle; 100, Battery Unit; 10, Housing; 11, Receiving Cavity; 20, Battery Cell; 30, Heat Exchange Assembly; 31, Heat Exchange Body; 31a, Flow Channel Cavity; 31b, Mounting Cavity; 31c, Wiring Tray; 31d, Wiring Hole; 311, Shell; 311a, Heat Exchange Wall; 312, Partition Plate; 32, Heat Exchange Connector; 33, Heating Element; 33a, Heating Wire; 33b, Heating Plate; 331, Main Section; 332, Transfer Section; 333, Wiring Terminal; 34, Current Collector; 35, Heat Conducting Structure; 200, Controller; 300, Motor. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0050] The specific technical features described in the specific embodiments can be combined in any suitable manner without contradiction. For example, different combinations of specific technical features can form different embodiments and technical solutions. To avoid unnecessary repetition, the various possible combinations of the specific technical features in this application will not be described separately.

[0051] In the following description, the terms "first," "second," etc., are used merely to distinguish different objects and do not indicate that the objects have the sameness or relationship. It should be understood that the directional descriptions "above," "below," "outside," and "inside" refer to the orientation under normal use conditions, while "left" and "right" refer to the left and right directions shown in the corresponding diagrams, which may or may not be the left and right directions under normal use conditions.

[0052] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. "A plurality of" means two or more.

[0053] In the description of this application, the orientation or positional relationship of "first direction", "second direction" and "third direction" are based on the orientation or positional relationship shown in the accompanying drawings. Among them, "first direction" is the direction indicated by arrow L1 in the accompanying drawings, "second direction" is the direction indicated by arrow L2 in the accompanying drawings, and "third direction" is the direction indicated by arrow L3 in the accompanying drawings. It should be understood that these orientation terms are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0054] In the description of the embodiments of this application, the technical terms "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed, operated or used in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0055] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0056] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "contact" should be interpreted broadly, and can be direct contact, contact through an intermediate medium layer, contact between two contacting parties with substantially no interaction force, or contact between two contacting parties with interaction force.

[0057] With the development of clean energy, more and more devices are using electricity as their driving force, leading to the rapid development of power batteries, such as lithium-ion batteries, which can store a large amount of electrical energy and can be repeatedly charged and discharged. These power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in aerospace and other fields.

[0058] In related technologies, a heat exchange component is installed in the battery device. This component can conduct a heat exchange medium, which is used to exchange heat with the individual battery cells. Generally, the heat exchange medium can provide good cooling for the individual battery cells, but its heating effect is limited. Therefore, in some related technologies, an active heating structure is integrated into the heat exchange component.

[0059] This application proposes that the active heating structure is usually installed by a separate slotting method in the related technology, which will increase the manufacturing cost of the battery device. In addition, the slotting may reduce the structural strength of the heat exchange component and affect the reliability of thermal management.

[0060] To address the aforementioned problems, a battery device according to an embodiment of this application is proposed. The battery device according to this embodiment includes a housing, battery cells, and a heat exchange assembly. The housing has a receiving cavity, within which the battery cells are disposed. The heat exchange assembly includes a heat exchange body, a heat exchange connector, and a heating element. The heat exchange body has multiple chambers, wherein at least one chamber forms a flow channel cavity, and at least one chamber forms a mounting cavity. The heat exchange connector communicates with the flow channel cavity to conduct a heat exchange medium into the flow channel cavity. The heat exchange medium is used to exchange heat with the battery cells. The heating element is disposed within the mounting cavity and is used to heat the battery cells. The heat exchange body has a heat exchange wall that contacts the battery cells and forms the cavity wall of both the mounting cavity and the flow channel cavity.

[0061] In the battery device of this application embodiment, the heat exchange component is both a conductor of heat exchange medium and has an independent heating element. This allows for improved heating of the battery cells while maintaining cooling performance. Furthermore, the heating element is located in a cavity of the heat exchange body where no cooling medium is introduced. Compared to related technologies where a separate groove is cut for the heating structure, this reduces the processing cost of the heat exchange body and improves its structural integrity. Moreover, the heat exchange wall of the heat exchange body simultaneously forms the cavity walls of both the mounting cavity and the flow channel cavity. This allows both the heat exchange medium in the flow channel cavity and the heating element in the mounting cavity to efficiently exchange heat with the battery cells through the heat exchange walls, achieving a better heat exchange effect. In summary, the battery device of this application embodiment improves the heating effect of the battery cells while balancing cost and thermal management reliability.

[0062] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0063] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0064] A single battery cell typically includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator, with the separator positioned between the positive and negative electrodes. During the charging and discharging process of a single battery cell, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator, positioned between the positive and negative electrodes, prevents short circuits while allowing active ions to pass through.

[0065] The electrode assembly can be a wound structure, a stacked structure, or a hybrid structure of wound and stacked.

[0066] In some implementations, the electrode assembly is a wound structure. The positive and negative electrode sheets are wound into a wound structure.

[0067] In some implementations, the electrode assembly is a stacked structure.

[0068] For example, multiple positive and negative electrodes can be provided, and multiple positive and multiple negative electrodes can be stacked alternately.

[0069] For example, multiple positive electrode sheets can be provided, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0070] For example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0071] For example, multiple separators may be provided, each disposed between any adjacent positive or negative electrode plates.

[0072] For example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0073] In some embodiments, the electrode assembly can be cylindrical, flat, or polygonal, etc.

[0074] In some embodiments, the electrode assembly is provided with tabs that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0075] In some embodiments, the battery cell may include a casing. The casing may be a steel casing, an aluminum casing, a plastic casing (such as a polypropylene casing), a composite metal casing (such as a copper-aluminum composite casing), or an aluminum-plastic film, etc. In some embodiments, the casing may be a sealed structure or a non-sealed structure. Exemplarily, when the casing is a non-sealed structure, the casing serves to protect the electrode assembly, and a sealing bag is included between the casing and the electrode assembly for encapsulating the electrode assembly and electrolyte. Specifically, the sealing bag may be a bag-shaped insulating component or an aluminum-plastic film. When the casing is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0076] For 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. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0077] In some embodiments, the housing includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also have one or more.

[0078] In some embodiments, at least one electrode terminal is provided on the housing, and the electrode terminal is electrically connected to the tab. The electrode terminal can be directly connected to the tab, or it can be indirectly connected to the tab through a current collector. The electrode terminal can be provided on the end cap or on the housing.

[0079] The technical solutions described in the embodiments of this application are applicable to electrical devices that use battery devices. The electrical devices include the battery devices of any embodiment of this application, and the battery devices are used to provide electrical energy.

[0080] Electrical equipment can include vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical equipment.

[0081] It should be noted that the technical solutions described in the embodiments of this application are not limited to the battery devices described above, but can also be applied to all electrical devices and energy storage devices that include battery devices. However, for the sake of brevity, the following embodiments are all described using electric vehicles as examples.

[0082] Reference Figure 1 The vehicle 1000 may contain a controller 200, a motor 300, and a battery device 100. The controller 200 controls the battery device 100 to supply power to the motor 300. For example, the battery device 100 may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the operating power source for the vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000 but also as the driving power source, replacing or partially replacing fuel or natural gas to provide driving power to the vehicle 1000.

[0083] Reference Figures 2-11 This application provides a battery device 100, including a housing 10, a battery cell 20, and a heat exchange assembly 30. The housing 10 has a receiving cavity 11, in which the battery cell 20 is disposed. The heat exchange assembly 30 includes a heat exchange body 31, a heat exchange connector 32, and a heating element 33. The heat exchange body 31 has multiple chambers, wherein at least one chamber is formed as a flow channel cavity 31a, and at least one chamber is formed as a mounting cavity 31b. The heat exchange connector 32 communicates with the flow channel cavity 31a to conduct a heat exchange medium to the flow channel cavity 31a. The heat exchange medium is used to exchange heat with the battery cell 20. The heating element 33 is disposed in the mounting cavity 31b and is used to heat the battery cell 20.

[0084] Reference Figure 2 The battery device 100 includes a housing 10 and a plurality of battery cells 20. The housing 10 has a receiving cavity 11, in which the plurality of battery cells 20 are disposed.

[0085] The enclosure 10 can be a simple three-dimensional structure such as a cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the enclosure 10 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0086] The housing 10 is used to encapsulate the battery cell 20. The housing 10 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 20.

[0087] As an example, the box 10 is typically a cuboid structure. The length and width directions of the box 10 are parallel to the horizontal plane, and the length direction of the box 10 is parallel to the longest side of the cuboid structure. The height direction of the box 10 is perpendicular to the ground.

[0088] The heat exchange component 30 is used to exchange heat with the battery cell 20. The specific location of the heat exchange component 30 is not limited here.

[0089] In some embodiments, at least one heat exchange component 30 is disposed on the top side of the battery cell 20. As an example, the housing 10 includes a top cover, with at least one heat exchange component 30 disposed between the top cover and the battery cell 20, and / or at least one heat exchange component 30 disposed on the side of the top cover facing away from the battery cell 20. As another example, the top side of the housing 10 has an opening, which the heat exchange component 30 covers; in other words, the heat exchange component 30 is formed as the top cover of the housing 10.

[0090] In some embodiments, at least one heat exchange component 30 is disposed on the bottom side of the battery cell 20. As an example, the housing 10 includes a bottom plate disposed on the bottom side of the battery cell 20. In this case, at least one heat exchange component 30 is disposed between the bottom plate and the battery cell 20, and / or at least one heat exchange component 30 is disposed on the side of the bottom plate opposite to the battery cell 20. As another example, the bottom side of the housing 10 has an opening, and the heat exchange component 30 covers this opening; in other words, the heat exchange component 30 is formed as the bottom plate of the housing 10.

[0091] In some embodiments, at least one heat exchange component 30 is disposed on one side of the battery cell 20 along the length or width direction of the housing 10. As an example, the housing 10 includes a side beam for constraining the battery cell 20, and the heat exchange component 30 is disposed between the side beam and the battery cell 20, or the heat exchange component 30 is disposed on the side of the side beam opposite to the battery cell 20.

[0092] In some embodiments, at least one heat exchange component 30 is disposed between two adjacent battery cells 20. As an example, at least one heat exchange component 30 is disposed between the large surfaces of two adjacent battery cells 20, where the large surface refers to the surface with the largest area among all surfaces of the battery cell 20.

[0093] Reference Figures 3-11 The heat exchange assembly 30 includes a heat exchange body 31, a heat exchange joint 32, and a heating element 33.

[0094] The heat exchanger body 31 has multiple chambers. The specific structural form of the heat exchanger body 31 is not limited, as long as it can form the above-mentioned multiple chambers.

[0095] For example, the heat exchanger body 31 is configured as a harmonica tube, for instance, referring to Figure 4 and Figure 8 The heat exchange body 31 includes a shell 311 and a partition 312 disposed inside the shell 311. The partition 312 divides the space inside the shell 311 into multiple chambers.

[0096] As another example, the heat exchange body 31 is configured to include at least two heat exchange plates stacked together, with at least one heat exchange plate recessed in the direction of stacking toward the surface of the adjacent heat exchange plate to form a groove, so that the two adjacent heat exchange plates surround to form a plurality of chambers.

[0097] As another example, the heat exchange body 31 includes a plurality of heat exchange tubes arranged side by side, and the lumen of each heat exchange tube forms a chamber.

[0098] Reference Figure 4 and Figure 8 In the heat exchange body 31, at least one chamber is formed as a flow channel cavity 31a, at least one chamber is formed as an installation cavity 31b, the heat exchange joint 32 is connected to the flow channel cavity 31a to conduct heat exchange medium to the flow channel cavity 31a, and the heating element 33 is disposed in the installation cavity 31b.

[0099] Here, the heat exchange joint 32 is specifically used to connect the flow channel cavity 31a to an external circulation system to introduce heat exchange medium into the flow channel cavity 31a or to export the heat exchange medium from the flow channel cavity 31a. Exemplarily, the heat exchange joint 32 includes an inlet joint and an outlet joint, the inlet joint being used to introduce heat exchange medium into the flow channel cavity 31a, and the outlet joint being used to export the heat exchange medium from the flow channel cavity 31a.

[0100] The specific type of heat exchange medium is not limited here, as long as it can achieve a heat exchange effect on the battery cell 20. For example, the heat exchange medium can be gaseous or liquid. The heat exchange medium can be used to cool the battery cell 20 or to heat the battery cell 20, and those skilled in the art can adjust it according to actual usage requirements.

[0101] It should be noted that in this embodiment, the heat exchange joint 32 is only connected to the flow channel cavity 31a and not to the mounting cavity 31b. In other words, no heat exchange medium is introduced into the mounting cavity 31b so that the heating element 33 will not come into contact with the heat exchange medium.

[0102] The specific structure of the heating element 33 is not limited, as long as it can achieve the function of active heating.

[0103] For example, refer to Figure 4 and Figure 5 The heating element 33 includes a heating wire 33a, such as an electric heating wire 33a. Also exemplarily, refer to... Figure 8 and Figure 10The heating element 33 includes a heating element 33b, such as a PTC heating element (Positive Temperature Coefficient).

[0104] In this embodiment, the specific configuration of which chambers of the heat exchange body 31 are set as flow channel chambers 31a and which chambers are set as installation chambers 31b can be determined by those skilled in the art based on actual usage requirements.

[0105] It should be noted that in some embodiments, at least one chamber may be formed as a cavity, in which neither a heat exchange medium is circulated nor a heating element 33 is provided.

[0106] Furthermore, the heat exchange body 31 has a heat exchange wall 311a, which is disposed in contact with the battery cell 20, and the heat exchange wall 311a is formed as the cavity wall of the flow channel cavity 31a and the mounting cavity 31b.

[0107] Here, the contact between the heat exchange wall 311a and the battery cell 20 can be direct contact or indirect contact via other intermediate structures, and there is no limitation on this.

[0108] In this embodiment, the heat exchange wall 311a is formed as both the cavity wall of the flow channel cavity 31a and the cavity wall of the mounting cavity 31b. In other words, at least one cavity wall of both the flow channel cavity 31a and the mounting cavity 31b is in contact with the battery cell 20.

[0109] In the battery device 100 of this embodiment, the heat exchange component 30 is both a heat exchange medium and has an independent heating element 33. This allows for improved heating of the battery cells 20 while maintaining cooling efficiency. Furthermore, the heating element 33 is disposed within a cavity of the heat exchange body 31 where no cooling medium is introduced. Compared to related technologies where a separate groove is used for the heating structure, this reduces the manufacturing cost of the heat exchange body 31 and improves its structural integrity. Moreover, the heat exchange wall 311a of the heat exchange body 31 simultaneously forms the cavity wall of both the mounting cavity 31b and the flow channel cavity 31a. This allows both the heat exchange medium in the flow channel cavity 31a and the heating element 33 in the mounting cavity 31b to efficiently exchange heat with the battery cells 20 through the heat exchange wall 311a, achieving a better heat exchange effect. In summary, the battery device 100 of this embodiment improves the heating effect of the battery cells 20 while balancing cost and thermal management reliability.

[0110] In some embodiments, refer to Figure 4 and Figure 8 Multiple chambers are arranged side by side. Along the arrangement direction of the multiple chambers, at least one mounting chamber 31b is disposed between two adjacent flow channel chambers 31a, and / or at least one flow channel chamber 31a is disposed between two adjacent mounting chambers 31b.

[0111] For example, along the arrangement direction of the multiple chambers, the mounting cavity 31b and the flow channel cavity 31a are alternately arranged.

[0112] In this embodiment, this arrangement allows the mounting cavity 31b and the flow channel cavity 31a to be relatively evenly distributed on the heat exchange body 31. Thus, whether the heat exchange medium is used to exchange heat with the battery cell 20 or the heating element 33 is used to heat the battery cell 20, the heat exchange body 31 can maintain relatively good temperature uniformity, thereby helping to improve the temperature consistency of each position of the battery cell 20.

[0113] Of course, in some other embodiments, the mounting cavity 31b can also be located entirely on one side of the flow channel cavity 31a along the arrangement direction, thereby reducing the assembly difficulty of the heating element 33.

[0114] In some embodiments, refer to Figure 4 Multiple chambers are arranged side by side, and at least one of the two chambers located at both ends forms an installation cavity 31b along the arrangement direction of the multiple chambers.

[0115] It is understood that in actual use, the heating element 33 needs to be connected to an external circuit to achieve power supply and / or control. In this embodiment, the chamber at at least one end of the heat exchange body 31 is set as the mounting cavity 31b. It is understood that this position is usually close to the edge of the housing 10. Setting the mounting cavity 31b here helps to reduce the possibility of interference between the wiring harness used when the heating element 33 is connected to the external wiring harness and the battery cell 20 or other structures in the housing 10, thereby reducing the difficulty of wiring.

[0116] In some embodiments, refer to Figure 4 and Figure 8 The heat exchange body 31 includes a shell 311 and a partition 312 disposed inside the shell 311. The partition 312 divides the internal space of the shell 311 into multiple chambers.

[0117] For example, the housing 311 and the partition 312 are configured as an integral structure, such as an integral injection molded part, an integral metal part (e.g., an extruded structure, a welded structure, etc.).

[0118] The specific materials of the housing 311 and the partition 312 are not limited. For example, the housing 311 and the partition 312 are made of plastic. For another example, the housing 311 and the partition 312 are made of metal. For yet another example, the housing 311 is made of metal and the partition 312 is made of plastic.

[0119] In this embodiment, the internal space of the housing 311 is divided into multiple chambers by means of a partition 312. This helps to further reduce manufacturing costs. On the other hand, the partition 312 does not damage the integrity of the housing 311's own structure, thereby helping to further improve the structural strength of the heat exchange body 31 and thus improve the reliability of thermal management.

[0120] Of course, in some other embodiments, the heat exchange body 31 can also be configured as other structural forms mentioned above.

[0121] In some embodiments, refer to Figure 4 and Figure 8 The shell 311 has at least one sidewall formed as a heat exchange wall 311a along the first direction, and a plurality of chambers are arranged side by side along the second direction, each chamber extending along the third direction, the first direction, the second direction and the third direction being perpendicular to each other.

[0122] For example, refer to Figure 4 and Figure 8 The thickness direction of the partition 312 is perpendicular to the third direction. The two ends of the partition 312 along the first direction are connected to the housing 311 and the partition 312 extends along the third direction. Optionally, there are multiple partitions 312, and the multiple partitions 312 are spaced apart along the second direction, so as to divide the internal space of the housing 311 to form the above-mentioned multiple chambers.

[0123] For example, the housing 311 is a generally rectangular plate structure, the first direction is the thickness direction of the housing 311, one of the second direction and the third direction is the length direction of the housing 311, and the other is the width direction of the housing 311.

[0124] In this embodiment, this arrangement helps to further reduce the manufacturing difficulty and cost of the heat exchange body 31. For example, in embodiments where the shell 311 and the partition 312 are formed as an integral injection molded part or an integral metal part, this arrangement can significantly reduce the demolding difficulty and mold manufacturing cost.

[0125] It should be noted that the arrangement of multiple chambers is not limited to this. For example, in some other embodiments, the chambers may be arranged in a serpentine pattern, and / or the multiple chambers may be arranged in an irregular manner.

[0126] In some embodiments, further, referring to Figure 4 and Figure 8 The thickness direction of the partition 312 is perpendicular to the third direction and intersects both the first and second directions. In other words, the surface of the partition 312 is inclined relative to the first direction, rather than parallel to the first direction.

[0127] It should be noted that in this embodiment, there can be multiple partitions 312, and the thickness directions of the multiple partitions 312 can be parallel to each other or intersecting, without limitation.

[0128] Understandably, at least one sidewall of the housing 311 along the first direction is formed as a heat exchange wall 311a. This causes the housing 311 to be subjected to forces from the battery cell 20 along the first direction, such as the gravity or expansion force of the battery cell 20. In this embodiment, the partition 312 is inclined, which helps to improve the stress distribution of the partition 312 when the housing 311 is subjected to forces along the first direction, and improves the compressive strength of the heat exchange body 31. Furthermore, in embodiments where the housing 311 and the partition 312 are configured as elastic structures (e.g., injection-molded structures), the deformation adaptability of the heat exchange body 31 can be improved.

[0129] Of course, in some other embodiments, the thickness direction of the partition 312 may also be perpendicular to the first direction.

[0130] In some embodiments, refer to Figure 3 and Figure 4 , Figure 7 and Figure 8 The number of flow channel cavities 31a is multiple, and the heat exchange assembly 30 includes a collector 34, which connects the heat exchange joint 32 to multiple flow channel cavities 31a.

[0131] This will significantly reduce the number of heat exchange joints 32 required, thereby reducing the assembly difficulty of the heat exchange assembly 30.

[0132] For example, the flow channel cavity 31a is open on both sides along the third direction, and the shell 311 is provided with a collector 34 at each of the two opposite ends along the third direction. Each collector 34 is provided with a heat exchange joint 32, and the heat exchange joint 32 of one collector 34 is set as an inlet joint, and the heat exchange joint 32 of the other collector 34 is set as an outlet joint.

[0133] For example, the current collector 34 has multiple flow channels that correspond one-to-one with multiple flow channel cavities 31a, and the heat exchange joint 32 is simultaneously connected to multiple flow channels, thereby enabling the current collector 34 to connect the heat exchange joint 32 to multiple flow channel cavities 31a. As another example, the current collector 34 has a flow collecting cavity, the heat exchange joint 32 is connected to the flow collecting cavity, and the flow collecting cavity is simultaneously connected to multiple flow channel cavities 31a, thereby enabling the current collector 34 to connect the heat exchange joint 32 to multiple flow channel cavities 31a.

[0134] For example, the mounting cavity 31b is open at both ends in a third direction, and the heat exchange assembly 30 includes a sealing structure. The sealing structure is configured to seal the opposite ends of the mounting cavity 31b, so that the heat exchange medium in the current collector 34 cannot flow into the mounting cavity 31b. Here, the specific structural form of the sealing structure is not limited, as long as it can seal both ends of the mounting cavity 31b.

[0135] Of course, in some other embodiments, the heat exchange assembly 30 may not include the collector 34, and a heat exchange connector 32 may be provided for each flow channel cavity 31a, or multiple flow channel cavities 31a may be configured to be interconnected.

[0136] In some embodiments, the heating element 33 further includes a heating element 33b, the thickness direction of which is perpendicular to the third direction and intersects both the first and second directions.

[0137] For example, in a cross section perpendicular to the third direction, the cross section of the mounting cavity 31b is rectangular (the thickness direction of the partition 312 is perpendicular to the first direction), and the thickness direction of the heating element 33b can be perpendicular to the diagonal direction of the rectangle. Alternatively, the cross section of the mounting cavity 31b is rhomboid (the thickness direction of the partition 312 intersects both the first and second directions), and the thickness direction of the heating element 33b is perpendicular to the longer of the two diagonals of the rhomboid.

[0138] In this embodiment, the heating element 33b is further tilted, which improves the utilization rate of the space in the mounting cavity 31b and increases the effective heating area of ​​the heating element 33 without increasing the volume of the mounting cavity 31b, thereby further improving the heating effect.

[0139] In some embodiments, the heating element 33 includes at least two main body segments 331 and at least one transition segment 332. The at least two main body segments 331 are respectively disposed in different mounting cavities 31b, and the transition segment 332 is located outside the mounting cavity 31b and electrically connects the multiple main body segments 331 disposed in different mounting cavities 31b.

[0140] Here, each mounting cavity 31b may contain only one main body segment 331 or multiple main body segments 331, and there is no restriction on this.

[0141] Here, the transition section 332 is specifically used to electrically connect the main body sections 331 in different mounting cavities 31b. The transition section 332 can be configured to connect the main body sections 331 in series, or the transition section 332 can be configured to connect the main body sections 331 in parallel, or some of the transition sections 332 can be configured to connect the main body sections 331 in series, and other transition sections 332 can be configured to connect the main body sections 331 in parallel. There are no restrictions on this.

[0142] As mentioned above, the heating element 33 may include a heating wire 33a or a heating plate 33b. Regardless of the structural form, the heating element 33 may be configured to include at least two main body sections 331 and at least one transition section 332.

[0143] Taking the heating element 33 including the heating wire 33a as an example, both the main body segment 331 and the transition segment 332 can be set as the heating wire 33a, or the main body segment 331 can be set as the heating wire 33a, and the transition segment 332 can be set as the connecting wire harness (that is, the ordinary wire harness for electric heating function). Taking the heating element 33 including the heating plate 33b as an example, the main body segment 331 can be set as the heating plate 33b, and the transition segment 332 can be the connecting wire harness.

[0144] In this embodiment, multiple main body segments 331 located in different mounting cavities 31b are electrically connected by the adapter segment 332. In this way, multiple main body segments 331 can be connected to the external circuit at the same time, which significantly reduces the wiring difficulty of the heating element 33.

[0145] It should be noted that in some other embodiments, the heating element 33 may not include the adapter section 332. In this embodiment, the heating element 33 in different mounting cavities 31b can be independently connected to external lines.

[0146] In some embodiments, refer to Figure 4 and Figure 6 The outer surface of the heat exchange body 31 is recessed to form at least one wiring groove 31c, which is connected to at least two mounting cavities 31b, and the transition section 332 is disposed in the wiring groove 31c.

[0147] It should be noted that in this embodiment, the wiring trough 31c only needs to be able to accommodate at least a portion of the transition section 332, and its impact on the structural strength of the heat exchange body 31 is very limited.

[0148] In this embodiment, by placing the transition section 332 inside the wiring groove 31c, the transition section 332 can be protected, the wear probability of the transition section 332 can be reduced, and the service life and reliability of the heat exchange component 30 can be improved.

[0149] Of course, in some other embodiments, the outer surface of the heat exchange body 31 may not have the above-mentioned wiring groove 31c formed.

[0150] In some embodiments, refer to Figure 4 and Figure 6 At least one sidewall of the heat exchange body 31 along the first direction is formed as a heat exchange wall 311a. The surface of the heat exchange wall 311a facing the battery cell 20 is a heat exchange surface. The wiring groove 31c is formed on the heat exchange surface. Along the first direction, the surface of the transition section 332 is flush with or lower than the heat exchange surface.

[0151] In this embodiment, the wiring groove 31c is further disposed on the heat exchange surface. It can be understood that the heat exchange surface is disposed facing the battery cell 20, and the surface of the battery cell 20 is usually relatively flat. Therefore, disposing of the wiring groove 31c here helps to further reduce the wear probability of the transition section 332. Furthermore, the surface of the transition section 332 does not protrude from the heat exchange surface, so that the contact between the heat exchange surface and the battery cell 20 can be made tighter, ensuring the heat exchange effect.

[0152] In some embodiments, refer to Figure 4 , Figure 6 , Figure 9 and Figure 11 The heat exchange body 31 has a wiring hole 31d that communicates with the mounting cavity 31b, and the heating body 33 has a wiring terminal 333, which is connected to the wiring hole 31d.

[0153] Here, the terminal 333 of the heating element 33 specifically refers to the end of the heating element 33 used for connecting to an external circuit.

[0154] Here, terminal 333 can extend from the wiring port into the mounting cavity 31b and connect to the external wiring, or the external wiring can extend into the mounting cavity 31b through the wiring hole 31d and connect to terminal 333, without limitation.

[0155] Here, the specific location of the wiring hole 31d is not limited. For example, the wiring hole 31d is located at the end of the heat exchange body 31 along a third direction. This helps to achieve a unified arrangement of the pipes (for conducting the heat exchange medium) and wiring harnesses (for electrical connection with the heating element 33) of the battery device 100, reducing assembly difficulty. For example, the wiring hole 31d is located on the heat exchange wall 311a, or on a wall intersecting with the heat exchange wall 311a.

[0156] For example, the wiring hole 31d is set as an oblong hole, which reduces the difficulty of wiring. Of course, the wiring hole 31d can also be set as a circular hole, a rectangular hole, etc., and there is no limitation on this.

[0157] In the embodiment mentioned above, the heating element 33 includes a main body segment 331 and a transition segment 332. For example, the transition segment 332 connects multiple main body segments 331 in series. The two main body segments 331 at both ends in the series direction are provided with wiring terminals 333. The wiring terminals 333 are connected through wiring holes 31d.

[0158] In embodiments where the heating element 33 does not include the adapter section 332, each mounting cavity 31b may be provided with at least one wiring hole 31d, and the heating element 33 in each mounting cavity 31b may be connected to an external wiring harness through the corresponding wiring hole 31d.

[0159] In this embodiment, a wiring hole 31d is provided on the heat exchange body 31 to realize the wiring of the wiring terminal 333 of the heating body 33, which helps to further reduce the difficulty of wiring.

[0160] Of course, in some other embodiments, the heat exchange body 31 may not have a wiring hole 31d, and the heating element 33 may be wired through a structure such as a current collector 34.

[0161] In some embodiments, as mentioned above, the heating element 33 includes a heating wire 33a, and / or the heating element 33 includes a heating plate 33b.

[0162] It should be noted that the heating element 33 may include both a heating wire 33a and a heating plate 33b. In this embodiment, the heating wire 33a and the heating plate 33b may be disposed in the same mounting cavity 31b or in different mounting cavities 31b, and there is no limitation on this.

[0163] In this embodiment, configuring the heating element 33 to include a heating wire 33a helps reduce the difficulty of assembling the heating element 33 into the mounting cavity 31b and reduces costs. Configuring the heating element 33 to include a heating plate 33b helps improve heating efficiency and safety.

[0164] In some embodiments, the battery device 100 further includes a heat-conducting structure 35 disposed in the mounting cavity 31b, which helps to improve the heat exchange efficiency between the heating element 33 and the battery cell 20.

[0165] For example, the thermally conductive structure 35 is configured as a thermally conductive colloid. This helps to increase the filling density of the thermally conductive structure 35, thereby improving the thermal conductivity. On the other hand, the thermally conductive colloid can also provide some support, fixation and protection for the heating element 33, thereby helping to improve the reliability of thermal management.

[0166] Of course, the thermally conductive structure 35 can also be set to other structures with higher thermal conductivity, and there are no restrictions on this.

[0167] In some embodiments, refer to Figure 2 The battery device 100 includes a plurality of battery cells 20 distributed along a first direction, and heat exchange components 30 are provided between adjacent battery cells 20 and / or between battery cells 20 and housing 10 along the first direction.

[0168] For example, the first direction is perpendicular to the large surface of the battery cell 20, where the large surface of the battery cell 20 refers to the surface with the largest area among all surfaces of the battery cell 20.

[0169] In this embodiment, this arrangement helps to increase the effective contact area between the heat exchange component 30 and the battery cell 20, thereby improving the thermal management effect.

[0170] The following describes in more detail the battery cell 20 involved in one or more of the embodiments above, using two specific examples.

[0171] Example 1

[0172] Reference Figures 2-6 The battery device 100 includes a housing 10, a battery cell 20, and a heat exchange assembly 30.

[0173] The housing 10 has a receiving cavity 11, in which battery cells 20 are disposed. Multiple battery cells 20 are distributed along a first direction. Along the first direction, each battery cell 20 is disposed on a heat exchange assembly 30 on opposite sides of the first direction.

[0174] The heat exchange assembly 30 includes a heat exchange body 31, a heat exchange joint 32, a heating element 33, and a collector 34.

[0175] The heat exchange body 31 includes a housing 311 and a plurality of partitions 312, which divide the internal space of the housing 311 into a plurality of chambers. At least one sidewall of the housing 311 along a first direction is formed as a heat exchange wall 311a, which is disposed in contact with the battery cell 20. The side surface of the heat exchange wall 311a facing the battery cell 20 is a heat exchange surface. The two ends of the partitions 312 along a second direction are respectively connected to the housing 311, and the partitions 312 extend to the two ends of the housing 311 along a third direction, thereby forming a plurality of chambers arranged along the second direction, each chamber extending along the third direction.

[0176] Here, the first direction, the second direction, and the third direction are perpendicular. The first direction is perpendicular to the large surface of the battery cell 20, and the second direction is the height direction of the battery cell 20.

[0177] The heat exchange body 31 has a collector 34 at each of its two opposite ends along a third direction, and a heat exchange joint 32 is provided on each collector 34 for introducing and exporting the heat exchange medium, respectively.

[0178] The heat exchange body 31 has multiple chambers including multiple flow channel chambers 31a and multiple mounting chambers 31b. The current collector 34 connects the heat exchange joint 32 to the multiple flow channel chambers 31a. The heating element 33 is disposed in the mounting chamber 31b. The heat exchange wall 311a is formed as the cavity wall of the flow channel chambers 31a and the mounting chamber 31b.

[0179] The heating element 33 includes a main body section 331 and a transition section 332. The main body section 331 is configured as a heating wire 33a. The main body section 331 is disposed inside the mounting cavity 31b, and the transition section 332 is disposed outside the mounting cavity 31b. Multiple main body sections 331 located in different mounting cavities 31b are connected in series.

[0180] The heat exchange surface of the heat exchange body 31 is formed with a wiring groove 31c, and the transition section 332 is disposed in the wiring groove 31c. The heat exchange body 31 also has a wiring hole 31d. The wiring terminal 333 of the heating element 33 is disposed in the body section 331, and the wiring terminal 333 is connected to the external wiring harness through the wiring hole 31d.

[0181] The heat exchange assembly 30 also includes a heat-conducting structure 35 disposed in the mounting cavity 31b, and the heat-conducting structure 35 is specifically configured as a heat-conducting colloid.

[0182] Example 2

[0183] Reference Figures 7-11 The difference from Embodiment 1 is that in Embodiment 2, the heating element 33 includes a plurality of heating plates 33b, and one heating plate 33b is disposed in each mounting cavity 31b. The thickness direction of the heating plate 33b is perpendicular to the third direction and intersects with both the first and second directions.

[0184] Each mounting cavity 31b is provided with at least one wiring hole 31d, and the wiring terminal 333 of the heating element 33b in each mounting cavity 31b is connected to the external wiring harness through the corresponding wiring hole 31d.

[0185] Embodiments of this application also provide a heat exchange component 30, see reference to Figures 3-11 The heat exchange assembly 30 includes a heat exchange body 31, a heat exchange connector 32, and a heating element 33. The heat exchange body 31 has multiple chambers, wherein at least one chamber is formed as a flow channel chamber 31a and at least one chamber is formed as a mounting chamber 31b. The heat exchange connector 32 communicates with the flow channel chamber 31a to conduct a heat exchange medium to the flow channel chamber 31a. The heat exchange medium is used to exchange heat with the battery cell 20. The heating element 33 is disposed in the mounting chamber 31b and is used to heat the battery cell 20. The heat exchange body 31 has a heat exchange wall 311a, which is used to contact the battery cell 20. The heat exchange wall 311a is formed as the cavity wall of the mounting chamber 31b and the flow channel chamber 31a.

[0186] Embodiments of this application also provide a battery device 100, including the battery device 100 and / or heat exchange assembly 30 as described in any of the above embodiments.

[0187] The heat exchange components and electrical devices of the present application embodiments have all the advantages of the battery device 100 described in any of the above embodiments, and will not be repeated here.

[0188] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, and improvements made within the spirit and scope of this application are included within the scope of protection of this application.

Claims

1. A battery device, characterized by, The battery device includes: The box-shaped enclosure has a receiving cavity; A single battery cell is disposed within the receiving cavity; and A heat exchange assembly includes a heat exchange body, a heat exchange connector, and a heating element. The heat exchange body has multiple chambers, wherein at least one chamber is formed as a flow channel cavity and at least one chamber is formed as a mounting cavity. The heat exchange connector communicates with the flow channel cavity to conduct a heat exchange medium into the flow channel cavity. The heat exchange medium is used to exchange heat with the battery cell. The heating element is disposed in the mounting cavity and is used to heat the battery cell. The heat exchange body has a heat exchange wall that is in contact with the battery cell and is formed as the cavity wall of the mounting cavity and the flow channel cavity.

2. The battery device according to claim 1, characterized by The plurality of chambers are arranged side by side, and along the arrangement direction of the plurality of chambers, at least one of the mounting chambers is disposed between two adjacent flow channel chambers, and / or at least one of the flow channel chambers is disposed between two adjacent mounting chambers.

3. The battery device of claim 1, wherein The plurality of chambers are arranged side by side, and at least one of the two chambers located at both ends along the arrangement direction of the plurality of chambers forms the mounting cavity.

4. The battery device of claim 1, wherein The heat exchanger body includes a shell and a partition disposed within the shell, the partition dividing the internal space of the shell into a plurality of chambers.

5. The battery device of claim 4, wherein, The shell has at least one sidewall formed as the heat exchange wall along a first direction, the plurality of chambers are arranged side by side along a second direction, and each of the chambers extends along a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

6. The battery device of claim 5, wherein The thickness direction of the partition is perpendicular to the third direction and intersects both the first and second directions; and / or The number of flow channel cavities is multiple, and the heat exchange assembly includes a collector that connects the heat exchange joint to the multiple flow channel cavities.

7. The battery device of claim 5, wherein The heating element includes a heating plate, the thickness direction of which is perpendicular to the third direction and intersects both the first and second directions.

8. The battery device according to any one of claims 1 to 7, characterized by, The heating element includes at least two main sections and at least one connecting section. The at least two main sections are respectively disposed in different mounting cavities. The connecting section is located outside the mounting cavity and electrically connects the multiple main sections disposed in the different mounting cavities.

9. The battery device of claim 8, wherein, The outer surface of the heat exchanger body is recessed to form at least one wiring groove, the wiring groove is connected to at least two of the mounting cavities, and the transition section is disposed in the wiring groove.

10. The battery device according to claim 9, characterized in that, At least one sidewall of the heat exchange body along the first direction is formed as the heat exchange wall, the side surface of the heat exchange wall facing the battery cell is the heat exchange surface, the wiring groove is formed on the heat exchange surface, and along the first direction, the surface of the transition section is flush with or lower than the heat exchange surface.

11. The battery device of any one of claims 1-7, wherein, The heat exchanger body has a wiring hole communicating with the mounting cavity, and the heating element has a wiring terminal, which is connected to the wiring hole.

12. The battery device of claim 1, wherein, The heating element includes a heating wire, and / or the heating element includes a heating plate.

13. The battery device of any one of claims 1-7, wherein, The battery device also includes a heat-conducting structure disposed within the mounting cavity.

14. The battery device of any one of claims 1-7, wherein, The battery device includes a plurality of battery cells distributed along a first direction, and the heat exchange assembly is disposed between adjacent battery cells and / or between a battery cell and the housing along the first direction.

15. A heat exchange assembly, characterized by The heat exchange assembly includes: a heat exchange body, a heat exchange connector, and a heating element. The heat exchange body has multiple chambers, wherein at least one chamber is formed as a flow channel cavity, and at least one chamber is formed as a mounting cavity. The heat exchange connector communicates with the flow channel cavity to conduct a heat exchange medium into the flow channel cavity. The heat exchange medium is used to exchange heat with the battery cell. The heating element is disposed in the mounting cavity and is used to heat the battery cell. The heat exchange body has a heat exchange wall, which is used to contact the battery cell. The heat exchange wall is formed as the cavity wall of the mounting cavity and the flow channel cavity.

16. An electrical device, characterized by The electrical equipment includes the battery device according to any one of claims 1-14, and / or the heat exchange assembly according to claim 15.

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