Heat exchange assembly, battery device and electric device

Abstract

The embodiment of the present application provides a heat exchange assembly, a battery device and a power utilization device. The battery device comprises a box body, a heat exchange assembly and a plurality of battery monomers arranged in the box body. The heat exchange assembly comprises at least one heat exchange piece, the heat exchange piece comprises a heat exchange main body and a current collector, a plurality of medium flow channels are arranged in the heat exchange main body, the current collector is arranged at least one end of the heat exchange main body along a first direction, and a current collecting cavity is arranged in the current collector. The current collector comprises a first main body part and a second main body part connected with the first main body part, the first main body part is at least partially plastic, and one end of the first main body part in the first direction is connected with an end of the heat exchange main body. The first main body part has a first cavity penetrating in the first direction, the first cavity is communicated with the medium flow channel, and the first cavity forms an opening at the other end in the first direction. The second main body part is connected with the first main body part to close the opening of the first main body part. The current collecting cavity is at least composed of the first cavity. The heat exchange piece further comprises a water port, and the water port is communicated with the current collecting cavity.

Description

Technical Field

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

[0002] With the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are being used more and more in the field of energy storage.

[0003] During the use of battery devices, the individual battery cells generate heat. If this heat is too high, it will adversely affect the performance and lifespan of the battery device. Therefore, heat exchange components are used to dissipate heat from the battery devices. Consequently, how to effectively exchange heat between the individual battery cells while reducing the weight of the heat exchange components has become an important research direction in this field. Utility Model Content

[0004] To address the aforementioned technical problems, embodiments of this application provide a heat exchange component, a battery device, and an electrical device, which facilitates both maintaining the heat exchange efficiency of the battery device and achieving a lightweight design of the battery device.

[0005] The embodiments of this application are implemented through the following technical solutions.

[0006] A first aspect of this application provides a battery device, including:

[0007] Box;

[0008] Multiple battery cells are disposed inside the housing;

[0009] A heat exchange assembly includes at least one heat exchange element, the heat exchange element includes a heat exchange body and a collector, the heat exchange body is provided with a plurality of medium flow channels inside, the collector is provided at at least one end of the heat exchange body along a first direction, the collector is provided with a collection cavity, and the collection cavity is configured to split and / or merge the heat exchange medium in the plurality of medium flow channels.

[0010] The current collector includes a first main body and a second main body connected to the first main body. The first main body is at least partially made of plastic. One end of the first main body is connected to the end of the heat exchange body in a first direction. The first main body has a first cavity extending through in the first direction, which communicates with the medium flow channel. The first cavity forms an opening at the other end in the first direction. The second main body is connected to the first main body to close the opening of the first main body. The current collector is at least formed by the first cavity. The heat exchanger also includes a water inlet that communicates with the current collector.

[0011] The heat exchange assembly in this embodiment includes a heat exchange element and a current collector. The current collector is used to distribute the heat exchange medium in the heat exchange assembly. The current collector includes a first main body and a second main body. At least a portion of the first main body is made of plastic. That is, by making at least a portion of the current collector plastic, compared to making the entire heat exchange element metal, it is beneficial to reduce the overall weight of the heat exchange assembly and achieve lightweighting of the battery device. In this embodiment, a first cavity extending in a first direction is provided inside the first main body, and an opening is provided at the end of the first cavity. During the connection between the first main body and the heat exchange body, the first cavity inside the first main body can be directly molded using a mandrel through injection molding. After injection molding, the mandrel is demolded through one end of the opening to realize the injection molding of the first main body. At the same time, a reliable connection between the first main body and the heat exchange body is achieved, which can reduce the risk of poor reliability when the first main body and the heat exchange body are connected by welding or other processes. In this embodiment, the opening of the first main body is closed by the second main body, so that the current collector cavity can form a closed cavity, thereby realizing the function of distributing and combining current. Therefore, by dividing the current collector into two parts, a first main body and a second main body, this embodiment of the application improves the reliability of the connection between the first main body and the heat exchange body, while also ensuring the functional stability of the current distribution and convergence within the current collector cavity. Furthermore, it helps to reduce the processing difficulty of the heat exchange body, shorten the production cycle of the battery device, and thus improve the production efficiency of the battery device.

[0012] In some embodiments, the current collector is a non-metallic component.

[0013] In some embodiments, the current collector is a plastic component.

[0014] By using a plastic current collector, the overall weight of the current collector is reduced, thus achieving a lightweight heat exchange component. Furthermore, the current collector can be integrally injection molded onto the heat exchange body through overmolding, ensuring a reliable connection between the current collector and the heat exchange body. This reduces the risk of poor reliability when using welding or other connection processes. Therefore, this embodiment of the application, by using a plastic current collector, improves the reliability of the connection between the current collector and the heat exchange body, achieves a lightweight heat exchange component, maintains the heat exchange efficiency, and reduces the processing difficulty of the heat exchange body. In addition, the current collector and the heat exchange body can be connected by at least one of plug-in connection, overmolding, or adhesive bonding, further improving the connection reliability between them.

[0015] In some embodiments, the thermal conductivity of the heat exchanger body is greater than that of the current collector.

[0016] By setting the thermal conductivity of the heat exchanger body to be greater than that of the current collector, on the one hand, it is beneficial to improve the heat exchange efficiency by allowing the heat exchange medium to exchange heat with the battery cells through the heat exchanger body. On the other hand, it can reduce the heat of the heat exchange medium from diffusing to the outside through the current collector, thereby improving the heat insulation performance of the heat exchange component and further improving the heat exchange efficiency.

[0017] In some embodiments, the water inlet is formed by the first main body and the second main body, and the second main body has a second cavity, and the flow collection cavity is formed by the first cavity and the second cavity.

[0018] In this embodiment, after the first main body and the second main body are connected, the first main body and the second main body together form a sprue, which further facilitates demolding. The first cavity of the first main body and the second cavity of the second main body are connected and together form a flow collecting cavity, which facilitates the molding of the flow collecting fluid.

[0019] In some embodiments, the water inlet is disposed on the first main body and communicates with the first cavity, the collecting cavity is formed separately by the first cavity, and the second main body closes the other end of the first cavity in the first direction.

[0020] In this way, while facilitating the molding of the first main body, it also reduces the molding difficulty of the second main body and facilitates the connection between the first and second main bodies.

[0021] In some embodiments, the second main body has a second cavity, and the first cavity and the second cavity together form the flow collecting cavity, and the water inlet is formed in the second main body, or...

[0022] The second main body has a second cavity, and the first cavity and the second cavity together form the flow collecting cavity, and the water inlet is formed in the first main body.

[0023] Since the sprue is located in the second main body, it simplifies the structure of the first main body, making its molding easier and reducing its molding difficulty. Furthermore, it also reduces the processing difficulty of integrally injection molding the current collector onto the heat exchanger body using a rubber-coated injection molding method.

[0024] Since the sprue is formed in the first main body, it not only facilitates the molding of the first main body, but also reduces the molding difficulty of the second main body.

[0025] In some embodiments, the first main body and the heat exchange body are connected by at least one of plug-in connection, overmolding, or adhesive connection.

[0026] Improve the reliability of the connection between the collector and the heat exchanger body.

[0027] In some embodiments, the first main body is a two-color injection molded structure, which includes a plastic layer and a soft rubber layer disposed inside the plastic layer. The heat exchange body is inserted into the soft rubber layer and is sealed with the soft rubber layer.

[0028] By configuring the first main body as a two-color injection molded structure, comprising a plastic layer and a soft rubber layer disposed inside the plastic layer, the plastic layer provides structural strength to the first main body, while the soft rubber layer improves the sealing performance between the heat exchanger body and the first main body, thus achieving a reliable connection between the current collector and the heat exchanger body. This reduces the risk of poor reliability when connecting the current collector and the heat exchanger body using welding or other processes. Therefore, by configuring the first main body as a two-color injection molded structure, this embodiment of the application improves the reliability of the connection between the current collector and the heat exchanger body, achieves lightweighting of the heat exchange component, and reduces the processing difficulty of the heat exchanger body.

[0029] In some embodiments, the second main body is bonded to the first main body by adhesive bonding, welding, or snap-fit ​​connection at least one of the following:

[0030] The connection structure is simple and reliable.

[0031] In some embodiments, on a projection plane perpendicular to the first direction, the orthographic projection of the first cavity at least covers the orthographic projection of the medium flow channel.

[0032] Since the flow collection cavity is composed of at least a first cavity and the first cavity is connected to the medium flow channel, on the projection plane perpendicular to the first direction, by at least covering the orthogonal projection of the medium flow channel with the orthogonal projection of the first cavity, it is convenient for the first cavity to be connected to the medium flow channel. In addition, when the first main body is directly encapsulated and injection molded onto the heat exchange body, the mold core of the mold used to injection mold the first main body can block the medium flow channel during the molding process, improve the situation of the injection slurry entering the medium flow channel, and facilitate the extraction of the mold core from the first cavity, thereby improving the convenience and reliability of molding.

[0033] In some embodiments, on a projection plane perpendicular to the first direction, the projection of the first cavity overlaps the projection of the end face of the heat exchange body.

[0034] This helps reduce the heat transfer efficiency of the first cavity, thereby improving the distribution and / or merging of heat transfer media in multiple media channels within the manifold. Furthermore, it facilitates the extraction of the mold core from the first cavity, improving the convenience and reliability of molding.

[0035] In some embodiments, the first main body includes at least two sub-connecting portions.

[0036] This further facilitates the extraction of the mold core from the first cavity. In addition, it facilitates the application of adhesive, making it easier to bond the first main body to the heat exchange body, or to bond the first main body to the second main body.

[0037] In some embodiments, there are two sub-connections, which are joined together along the thickness direction of the heat exchange body, and the thickness direction is perpendicular to the first direction.

[0038] The two sub-connection parts can be arranged symmetrically along the thickness direction of the heat exchange body, or they can be arranged asymmetrically.

[0039] In some embodiments, the at least two sub-connections are joined together along the width direction of the heat exchange body, the width direction being perpendicular to the first direction.

[0040] In embodiments where there are two sub-connections, the two sub-connections may be symmetrically arranged along the width direction of the heat exchange body, or they may not be symmetrically arranged.

[0041] In some embodiments, the edge of the end face of the first main body portion away from the second main body portion is formed into an arc surface.

[0042] The arc surface helps to improve the problem of failure caused by excessive local stress between the first main body and the heat exchange body, thereby improving the connection strength between the collector and the heat exchange body.

[0043] In some embodiments, the heat exchanger includes a sealing element disposed within a portion of the medium flow channel for sealing the corresponding medium flow channel.

[0044] By incorporating sealing components, corresponding media flow channels can be blocked as needed. Furthermore, during the process of directly overmolding the first main body onto the heat exchanger body, the sealing components can support the media flow channels of the heat exchanger while simultaneously blocking them.

[0045] A second aspect of this application provides a heat exchange assembly, the heat exchange assembly including at least one heat exchange element, the heat exchange element including a heat exchange body and a collector, the heat exchange body having a plurality of medium flow channels inside, the collector being disposed at at least one end of the heat exchange body along a first direction, the collector having a collection cavity inside, the collection cavity being configured to split and / or merge the heat exchange medium in the plurality of medium flow channels;

[0046] The current collector includes a first main body and a second main body connected to the first main body. The first main body is at least partially made of plastic. One end of the first main body is connected to the end of the heat exchange body in a first direction. The first main body has a first cavity extending through in the first direction, which communicates with the medium flow channel. The first cavity forms an opening at the other end in the first direction. The second main body is connected to the first main body to close the opening of the first main body. The current collector is at least formed by the first cavity. The heat exchanger also includes a water inlet that communicates with the current collector.

[0047] The heat exchange assembly in this embodiment includes a heat exchange element and a current collector. The current collector is used to distribute the heat exchange medium in the heat exchange assembly. The current collector includes a first main body and a second main body. At least a portion of the first main body is made of plastic. That is, by making at least a portion of the current collector plastic, compared to making the entire heat exchange element metal, it is beneficial to reduce the overall weight of the heat exchange assembly and achieve lightweighting of the battery device. In this embodiment, a first cavity extending in a first direction is provided inside the first main body, and an opening is provided at the end of the first cavity. During the connection between the first main body and the heat exchange body, the first cavity inside the first main body can be directly molded using a mandrel through injection molding. After injection molding, the mandrel is demolded through one end of the opening to realize the injection molding of the first main body. At the same time, a reliable connection between the first main body and the heat exchange body is achieved, which can reduce the risk of poor reliability when the first main body and the heat exchange body are connected by welding or other processes. In this embodiment, the opening of the first main body is closed by the second main body, so that the current collector cavity can form a closed cavity, thereby realizing the function of distributing and combining current. Therefore, by dividing the current collector into two parts, a first main body and a second main body, this embodiment of the application improves the reliability of the connection between the first main body and the heat exchange body, while also ensuring the functional stability of the current distribution and convergence within the current collector cavity. Furthermore, it helps to reduce the processing difficulty of the heat exchange body, shorten the production cycle of the battery device, and thus improve the production efficiency of the battery device.

[0048] A third aspect of this application provides an electrical device, including the battery device or the heat exchange component described above.

[0049] Since the power supply device includes the battery device provided above, by dividing the current collector into two parts, the reliability of the connection between the first main body and the heat exchange body is improved, while the functional stability of the current distribution and convergence in the current collector cavity is guaranteed. It also helps to reduce the processing difficulty of the heat exchange body, shorten the production cycle of the battery device, and improve the production efficiency of the battery device. Attached Figure Description

[0050] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0051] Figure 2 This is an exploded perspective view of a battery device provided in some embodiments of this application;

[0052] Figure 3 This is a schematic diagram of the assembly of a heat exchange component and a battery cell provided in some embodiments of this application;

[0053] Figure 4 This is a partial exploded perspective view of the heat exchange component provided in the first embodiment of this application;

[0054] Figure 5 A schematic diagram of the connection structure between the heat exchanger body and the first body portion provided in some embodiments of this application;

[0055] Figure 6 This is a partial exploded perspective view of the heat exchange component provided in the second embodiment of this application;

[0056] Figure 7 A partial exploded perspective view of the heat exchange component provided in the third embodiment of this application;

[0057] Figure 8 A partial structural schematic diagram of the heat exchange component provided in the fourth embodiment of this application;

[0058] Figure 9 for Figure 8 A three-dimensional exploded view;

[0059] Figure 10 This is a partial exploded perspective view of the heat exchange component provided in the fifth embodiment of this application;

[0060] Figure 11 This is a three-dimensional exploded view of a current collector provided in some embodiments of this application.

[0061] Explanation of reference numerals in the attached figures

[0062] 10. Battery cell; 20. Housing; 21. First housing section; 22. Second housing section; 30. Heat exchange assembly; 31. Heat exchange component; 32. Heat exchange main body; 321. Medium flow channel; 33. Current collector; 331. First main body section; 3311. Sub-connection section; 3312. First cavity; 3313. Opening; 332. Second main body section; 3321. Second cavity; 3322. First sub-section; 3323. Second sub-section; 35. Water inlet; 351. First annular structure; 352. Second annular structure; 353. Limiting part; 100. Battery device; 200. Controller; 300. Motor; 1000. Vehicle. Detailed Implementation

[0063] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit this application; the terms “comprising” and “having”, and any variations thereof, in the specification and the foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0065] In the description of the embodiments of this application, technical terms such as "first," "second," "third," and "fourth" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0066] In this document, the term "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. Unless otherwise specified, all embodiments and optional embodiments of this application may be combined with each other to form new technical solutions. The appearance of this phrase in various places in the specification 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 understand, explicitly and implicitly, that the embodiments described herein can be combined with other embodiments. Unless otherwise specified, all technical features and optional technical features of this application may be combined with each other to form new technical solutions.

[0067] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects are in an "or" relationship.

[0068] 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.

[0069] 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0070] 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.

[0071] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical term "projection" refers to an orthographic projection in which parallel projection lines are perpendicular to the projection plane.

[0072] The following is a detailed description of this application.

[0073] With the promotion and popularization of the concept of green development, new energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, battery devices are being used more and more in the field of energy storage.

[0074] During the use of a battery device, the individual battery cells generate heat. Excessive heat can negatively impact the performance and lifespan of the battery device. Therefore, heat exchange components are used to exchange heat within the battery device. Consequently, reducing the weight of the heat exchange components while effectively exchanging heat between the individual battery cells has become an important research direction in this field. Related technologies utilize a thermal management system within the battery device housing to exchange heat between the individual battery cells. This thermal management system may include multiple harmonica-tube cold plates laid within the battery device housing, with the surfaces of these cold plates in contact with the surfaces of the individual battery cells. For example, the cold plates may be positioned on the large surface of the individual battery cells. During use, a heat exchange medium, such as water, flows through these cold plates, achieving heat exchange with the individual battery cells, either cooling or heating them. In existing technologies, to improve the heat exchange efficiency between the heat exchange components and the individual battery cells, the heat exchange components are typically made of metal. However, metal is heavy, which is detrimental to the lightweight design of the entire battery device.

[0075] In view of this, to reduce the weight of the heat exchange assembly, this application provides a battery device, which includes a housing, a heat exchange assembly, and multiple battery cells. The multiple battery cells are disposed within the housing. The heat exchange assembly includes at least one heat exchange element, which includes a heat exchange body and a current collector. The heat exchange body has multiple media channels inside. The current collector is disposed at at least one end of the heat exchange body along a first direction and has a collection cavity configured to distribute and / or merge the heat exchange media within the multiple media channels. The current collector includes a first main body portion and a second main body portion connected to the first main body portion. The first main body portion is at least partially made of plastic, and one end of the first main body portion is connected to the end of the heat exchange body in the first direction. The first main body portion has a first cavity extending through in the first direction, communicating with the media channels, and an opening is formed at the other end of the first cavity in the first direction. The second main body portion is connected to the first main body portion to close the opening of the first main body portion. The collection cavity is at least formed by the first cavity. The heat exchange assembly also includes a water inlet communicating with the collection cavity.

[0076] The heat exchange assembly in this embodiment includes a heat exchange element and a current collector. The current collector is used to distribute the heat exchange medium in the heat exchange assembly. The current collector includes a first main body and a second main body. At least a portion of the first main body is made of plastic. That is, by making at least a portion of the current collector plastic, compared to making the entire heat exchange element metal, it is beneficial to reduce the overall weight of the heat exchange assembly and achieve lightweighting of the battery device. In this embodiment, a first cavity extending in a first direction is provided inside the first main body, and an opening is provided at the end of the first cavity. During the connection between the first main body and the heat exchange body, the first cavity inside the first main body can be directly molded using a mandrel through injection molding. After injection molding, the mandrel is demolded through one end of the opening to realize the injection molding of the first main body. At the same time, a reliable connection between the first main body and the heat exchange body is achieved, which can reduce the risk of poor reliability when the first main body and the heat exchange body are connected by welding or other processes. In this embodiment, the opening of the first main body is closed by the second main body, so that the current collector cavity can form a closed cavity, thereby realizing the function of distributing and combining current. Therefore, by dividing the current collector into two parts, a first main body and a second main body, this embodiment of the application improves the reliability of the connection between the first main body and the heat exchange body, while also ensuring the functional stability of the current distribution and convergence within the current collector cavity. Furthermore, it helps to reduce the processing difficulty of the heat exchange body, shorten the production cycle of the battery device, and thus improve the production efficiency of the battery device.

[0077] The battery device provided in this application embodiment can be used, but is not limited to, in electrical devices such as vehicles, ships, or aircraft.

[0078] This application also provides an energy storage device, which includes the battery device in any embodiment of this application.

[0079] Energy storage devices can include energy storage containers, energy storage cabinets, etc.

[0080] This application also provides an electrical device including the above-described battery device. The electrical device can be, but is not limited to, a mobile phone, tablet, laptop, electric toy, power tool, electric vehicle, electric car, ship, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0081] In the following embodiments, for ease of explanation, an example of an electrical device according to an embodiment of this application is a vehicle.

[0082] Please see 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] In some embodiments 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 for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0084] Figure 2 This is an exploded perspective view of a battery device provided in some embodiments of this application; the battery device 100 (Battery Apparatus) mentioned in the embodiments of this application may include multiple battery cells 10 for providing voltage and capacity. The multiple battery cells 10 are connected in series, parallel, or mixed via a busbar.

[0085] In some embodiments, the battery apparatus 100 may include one or more battery cell assemblies. A battery cell assembly may include multiple battery cells 10, which are connected in series, parallel, or mixed connections via a busbar.

[0086] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells 10; as an example, one or more battery cell assemblies can constitute a battery module, which is formed by arranging and fixing multiple battery cell assemblies into a single module. As an example, a battery module can be formed by bundling multiple battery cell assemblies together with cable ties.

[0087] In some embodiments, the battery device 100 may be a battery pack, which includes a battery case and one or more individual battery cells housed in the battery case.

[0088] As an example, one or more battery cell components can constitute a battery module, and the battery cell components can be housed in a battery case by fixing the battery module in a battery case.

[0089] As an example, the battery cell assembly can also be housed in the battery box by directly fixing multiple battery cells 10 to the battery box.

[0090] In this embodiment of the application, the battery cell 10 can be a secondary battery, which refers to the battery cell 10 that can be used again after being discharged by recharging to activate the active material.

[0091] The battery cell 10 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.

[0092] A battery cell 10 generally includes an electrode assembly. The electrode assembly includes a positive electrode, a negative electrode, and a separator. During the charging and / or discharging process of the battery cell 10, active ions (such as lithium ions) repeatedly insert and extract between the positive and negative electrodes. The separator is disposed between the positive and negative electrodes to prevent short circuits between the positive and negative electrodes while allowing active ions to pass through.

[0093] In some embodiments, the positive electrode can be a positive electrode sheet, which may include a positive current collector and a positive active material disposed on at least one surface of the positive current collector.

[0094] As an example, the positive current collector has two surfaces opposite each other in its own thickness direction, and the positive active material is disposed on either or both of the two opposite surfaces of the positive current collector.

[0095] In some embodiments, the positive electrode can be a foamed metal. The foamed metal can be foamed nickel, foamed copper, foamed aluminum, foamed alloys, etc. When foamed metal is used as the positive electrode, the surface of the foamed metal may or may not contain a positive electrode active material. As an example, lithium source material, potassium metal, or sodium metal can also be filled and / or deposited within the foamed metal, where the lithium source material is lithium metal and / or a lithium-rich material.

[0096] In some embodiments, the negative electrode can be a negative electrode sheet, which may include a negative electrode current collector 33.

[0097] In some embodiments, the electrode assembly further includes an isolator disposed between the positive and negative electrodes.

[0098] In some embodiments, the separator is a separator membrane. This application does not impose any particular limitation on the type of separator membrane; any known porous separator membrane with good chemical and mechanical stability can be selected.

[0099] In some embodiments, the separator is a solid electrolyte. The solid electrolyte is disposed between the positive and negative electrodes, serving both to transport ions and to isolate the positive and negative electrodes.

[0100] In some embodiments, the battery cell 10 further includes an electrolyte, which acts as a conductor of ions between the positive and negative electrodes. This application embodiment does not specifically limit the type of electrolyte and can select one according to requirements. The electrolyte can be liquid, gel, or solid.

[0101] In some embodiments, the electrode assembly is a wound structure. The positive electrode and the negative electrode are wound into a wound structure.

[0102] In some embodiments, the electrode assembly has a stacked structure.

[0103] As an example, multiple positive and negative electrode plates can be set, and multiple positive and multiple negative electrode plates can be stacked alternately.

[0104] As an example, multiple positive electrode sheets can be set, and negative electrode sheets are folded to form multiple stacked folded segments, with a positive electrode sheet sandwiched between adjacent folded segments.

[0105] As an example, both the positive and negative electrode sheets are folded to form multiple stacked folded segments.

[0106] As an example, multiple separators can be provided, each positioned between any adjacent positive or negative electrode plates.

[0107] As an example, the separator can be continuously arranged between any adjacent positive or negative electrode plates by folding or rolling.

[0108] In some embodiments, the electrode assembly may be cylindrical, flat, or polygonal, etc.

[0109] In some embodiments, the electrode assembly has tabs (not shown) that allow current to be drawn from the electrode assembly. The tabs include a positive tab and a negative tab.

[0110] In some embodiments, the battery cell 10 may include a housing. The housing is used to encapsulate components such as electrode assemblies and electrolytes. The housing may be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite), or aluminum-plastic film, etc.

[0111] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 10 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic battery cells. Multi-prismatic battery cells are, for example, hexagonal prismatic battery cells. There are no particular limitations in the embodiments of this application.

[0112] In some embodiments, a pressure relief mechanism (not shown) is provided on the housing. The pressure relief mechanism is used to release the internal pressure of the battery cell 10.

[0113] Below, refer to Figures 1 to 11 Some embodiments of this application will be described in detail.

[0114] In the description of the embodiments of this application, for ease of explanation, the direction of arrow X represents the "first direction", the direction of arrow Y represents the "thickness direction", and the direction of arrow Z represents the "width direction". The first direction X, the thickness direction Y, and the width direction Z intersect each other and are not coplanar. In some embodiments, the first direction X, the thickness direction Y, and the width direction Z are perpendicular to each other.

[0115] Please see Figures 2 to 11This application provides a battery device 100, which includes a housing 20, a heat exchange assembly 30, and a plurality of battery cells 10. The plurality of battery cells 10 are disposed within the housing 20. The heat exchange assembly 30 includes at least one heat exchange element 31, which includes a heat exchange body 32 and a current collector 33. The heat exchange body 32 has a plurality of medium flow channels 321 inside. The current collector 33 is disposed at at least one end of the heat exchange body 32 along a first direction, and has a collection cavity configured to divert and / or merge the heat exchange medium within the plurality of medium flow channels 321. The current collector 33 includes a first main body portion 331 and a second main body portion 332 connected to the first main body portion 331. The first main body portion 331 is at least partially made of plastic, and one end of the first main body portion 331 is connected to the end of the heat exchange body 32 in the first direction. The first main body 331 has a first cavity 3312 extending through in a first direction, which communicates with a medium flow channel 321. An opening 3313 is formed at the other end of the first cavity 3312 in the first direction. A second main body 332 is connected to the first main body 331 to close the opening 3313 of the first main body 331. The collection chamber is at least composed of the first cavity 3312. The heat exchanger 31 also includes a water inlet 35, which communicates with the collection chamber.

[0116] In some embodiments, the battery cell 10 includes a housing and an electrode assembly located within the housing.

[0117] In some embodiments, the housing is provided with electrode terminals, which pass through the housing and are electrically connected to the electrode assembly via tabs.

[0118] In some specific embodiments, the electrode terminals are made of conductive metal, such as copper or aluminum.

[0119] The "multiple" mentioned in the embodiments of this application refers to two or more.

[0120] The enclosure 20 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 20 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.

[0121] The housing 20 is used to encapsulate the battery cell 10. The housing 20 can prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 10.

[0122] Please see Figures 2 to 11This application provides a heat exchange assembly 30, which includes at least one heat exchange element 31. The heat exchange element 31 includes a heat exchange body 32 and a collector 33. The heat exchange body 32 has multiple medium flow channels 321 inside. The collector 33 is disposed at at least one end of the heat exchange body 32 along a first direction and has a collection cavity inside. The collection cavity is configured to divert and / or merge the heat exchange medium in the multiple medium flow channels 321. The collector 33 includes a first main body portion 331 and a second main body portion 332 connected to the first main body portion 331. The first main body portion 331 is at least partially made of plastic, and one end of the first main body portion 331 is connected to the end of the heat exchange body 32 in the first direction. The first main body portion 331 has a first cavity 3312 extending through in the first direction, which communicates with the medium flow channels 321. The other end of the first cavity 3312 forms an opening 3313 in the first direction. The second main body 332 is connected to the first main body 331 to close the opening 3313 of the first main body 331. The collection cavity is at least composed of the first cavity 3312. The heat exchanger 31 also includes a water inlet 35, which communicates with the collection cavity.

[0123] It should be noted that 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 10, such as being gaseous or liquid. In this embodiment, a liquid heat exchange medium is used as an example for description.

[0124] For example, the inlet 35 includes an inlet and an outlet, both of which are connected to the collection chamber.

[0125] Here, the inlet and outlet of the heat exchange component 30 are used to connect to the air conditioning system of the vehicle or electrical equipment, or to liquid storage devices such as water tanks.

[0126] It should be noted that the specific number of medium flow channels 321 is not limited here. There can be one or more.

[0127] The principle of heat exchange component 30 for heat exchange of battery cell 10 is as follows: the heat exchange medium output from the heat exchange medium source (not shown in the figure) enters the medium flow channel 321 through the inlet of heat exchange component 30. After the heat exchange medium exchanges heat with battery cell 10, the heat exchange medium flows out through the outlet of heat exchange component 30, thus completing the heat exchange of battery cell 10.

[0128] Here, the heat exchange component 30 can exchange heat with the battery cell 10 by either dissipating heat from the battery cell 10 or by heating the battery cell 10.

[0129] The housing 20 is used to house the battery cell 10, and the housing 20 can have various structures. See some embodiments. Figure 2The housing 20 includes a first housing portion 21 and a second housing portion 22, which cover each other to define a receiving cavity for accommodating the battery cell 10.

[0130] Of course, the first box section 21 and the second box section 22 can be of various shapes, such as cylinders, cuboids, etc.

[0131] To improve the sealing performance after the first housing part 21 and the second housing part 22 are connected, a sealing element, such as sealant or sealing ring, can also be provided between the first housing part 21 and the second housing part 22.

[0132] Assuming that the first box section 21 covers the top of the second box section 22, the first box section 21 can also be called the upper box cover, and the second box section 22 can also be called the lower box cover.

[0133] For example, the heat exchange assembly 30 may include one heat exchange element 31 or multiple heat exchange elements 31.

[0134] For example, heat exchanger 31 may be a harmonica tube.

[0135] Multiple medium flow channels 321 extending along the length direction (extension direction) of the heat exchange body 32 are formed inside the heat exchange body 32. The multiple medium flow channels 321 are arranged along the height direction of the heat exchange element 31 to allow the heat exchange medium to flow through.

[0136] The specific molding method of the heat exchanger body 32 is not limited here. For example, it can be formed by extrusion molding, die casting molding or injection molding.

[0137] Here, the heat exchange body 32 can be provided with a collector 33 at one end along the extension direction. When there is only one collector, the flow channel in the heat exchange body 32 is set as a U-shaped structure, and the collector has both an inlet and an outlet. Alternatively, collectors 33 can be provided at both ends along the extension direction of the heat exchange body 32.

[0138] For example, in an embodiment where a collector 33 is provided at both ends of the heat exchange body 32 along the extension direction, the collectors 33 at both ends of the heat exchange body 32 are the same size and shape, and are symmetrically arranged at both ends of the heat exchange body 32 along the length direction.

[0139] The first main body 331 may be partially made of plastic or entirely made of plastic.

[0140] Please see Figure 4 The first main body 331 has a first cavity 3312 extending through in a first direction. One end of the first main body 331 in the first direction is connected to the end of the heat exchange body 32, and the other end is connected to the second main body 332.

[0141] There are multiple ways to connect the first main body 331 to the heat exchange body 32.

[0142] For example, the first main body 331 and the heat exchange body 32 are connected by at least one of plug-in connection, overmolding, or adhesive connection.

[0143] There are multiple ways to connect the first main body 331 and the second main body 332.

[0144] For example, the first main body portion 331 and the second main body portion 332 are at least one of adhesive connection, welding connection or snap-fit ​​connection.

[0145] For example, if the first main body 331 and the heat exchange body 32 are bonded together, the heat exchange body 32 is bonded to the first main body 331 after applying adhesive around its periphery.

[0146] In an embodiment where the first main body 331 and the heat exchange body 32 are overmolded, in order to form a first cavity 3312 that communicates with the medium flow channel 321 within the first main body 331, the first cavity 3312 is penetrated through the first main body 331 in a first direction. Thus, one end of the first cavity 3312 in the first direction is connected to the medium flow channel 321, and an opening 3313 is formed at the other end in the first direction. This allows the mold core of the mold used for injection molding the first main body 331 to be extracted from the first cavity 3312 through the opening 3313. This further facilitates the molding of the current collector 33 and improves the production efficiency of the current collector 33.

[0147] If there is a partially blocked medium flow channel 321 inside the heat exchange body 32, the first body part 331 has a through hole at the end away from the opening 3313, and the size of the through hole is greater than or equal to the size of the medium flow channel 321 in the heat exchange body 32, so as to ensure that the core rod can be easily removed.

[0148] The heat exchange assembly 30 in this embodiment includes a heat exchange element 31 and a current collector 33. The current collector 33 is used to distribute the heat exchange medium in the heat exchange assembly 30. The current collector 33 includes a first main body 331 and a second main body 332. At least a portion of the first main body 331 is made of plastic. That is, by making at least a portion of the current collector 33 plastic, compared to making the entire heat exchange element 31 metal, it is beneficial to reduce the overall weight of the heat exchange assembly 30 and achieve the weight reduction of the battery device 100. In this embodiment, a first cavity 3312 extending in a first direction is provided inside the first main body 331, and an opening 331 is provided at the end of the first cavity 3312. 3. In the process of connecting the first main body 331 and the heat exchange body 32, the first cavity 3312 inside the first main body 331 can be directly molded by using a mandrel through injection molding. After injection molding is completed, the mandrel is demolded through one end of the opening 3313 to realize the injection molding of the first main body 331 and realize a reliable connection between the first main body 331 and the heat exchange body 32. This can reduce the risk of poor reliability when the first main body 331 and the heat exchange body 32 are connected by welding or other processes. In this embodiment, the opening 3313 of the first main body 331 is closed by the second main body 332 so that the flow collection cavity can form a closed cavity, thereby realizing the function of flow distribution and convergence. Therefore, by dividing the current collector 33 into two parts, the first main body 331 and the second main body 332, the reliability of the connection between the first main body 331 and the heat exchange body 32 is improved, while the functional stability of the current distribution and convergence in the current collection cavity is guaranteed. It also helps to reduce the processing difficulty of the heat exchange body 32, shorten the production cycle of the battery device 100, and improve the production efficiency of the battery device 100.

[0149] For example, please refer to Figure 3 and Figure 4 In some embodiments, the inlet and outlet are located on opposite sides of the collector 33 in the thickness direction of the heat exchange body 32. This facilitates the parallel and spaced assembly of multiple heat exchange elements 31.

[0150] Of course, in other embodiments, the inlet and outlet can also be located at the end of the collector 33 away from the heat exchange body 32. Furthermore, the inlet and outlet are arranged along the height direction of the first collector 33.

[0151] In some embodiments, the current collector 33 is a non-metallic component.

[0152] For example, the current collector 33 is a plastic part.

[0153] The heat exchanger body 32 can be made of metal, which can achieve the weight reduction of the heat exchanger assembly 30 while ensuring the heat exchange efficiency of the heat exchanger assembly 30.

[0154] The heat exchanger body 32 can also be a non-metallic part, such as using a non-metallic material with good thermal conductivity. In this way, while ensuring the heat exchange efficiency of the heat exchanger assembly 30, the heat exchanger assembly 30 can be further reduced in weight.

[0155] In related technologies, the current collector is a metal component with a relatively complex structure. Metal current collectors are typically manufactured using machining processes, which suffers from low manufacturing efficiency and high weight. Furthermore, because the current collector and the heat exchanger body are made of different materials with different melting points, it is difficult to achieve effective fusion of the current collector and the heat exchanger body at the same temperature during welding. After welding, the significant difference in their coefficients of thermal expansion leads to substantial internal stress upon cooling, making the weld prone to cracking. Therefore, due to the low reliability of welding, the arrangement and connection methods of the heat exchanger assembly pose significant challenges in achieving lightweight design.

[0156] In this embodiment, by making the current collector 33 a plastic part, the overall weight of the current collector 33 is reduced, thereby achieving a lightweight heat exchange component 30. Furthermore, the current collector 33 can be integrally injection molded onto the heat exchange body 32 through overmolding, ensuring a reliable connection between the current collector 33 and the heat exchange body 32. This reduces the risk of poor reliability when the current collector 33 and the heat exchange body 32 are connected using welding or other processes. Therefore, by making the current collector 33 a plastic part, this embodiment of the application improves the reliability of the connection between the current collector 33 and the heat exchange body 32, achieves a lightweight heat exchange component 30, and reduces the processing difficulty of the heat exchange body 32.

[0157] In addition, the collector 33 and the heat exchange body 32 can be connected by at least one of plug-in connection, overmolding, or adhesive connection, which improves the connection reliability between the collector 33 and the heat exchange body 32.

[0158] In some embodiments, the thermal conductivity of the heat exchange body 32 is greater than that of the current collector 33.

[0159] In other words, the thermal conductivity of the heat exchanger body 32 is greater than that of the heat collector 33.

[0160] The thermal conductivity can be determined according to the method specified in GB / T 22588-2008 "Measuring thermal diffusivity or thermal conductivity by flash method".

[0161] For example, the heat exchanger 31 mainly contacts the surface of the battery cell 10 through the surface of the heat exchange body 32, thereby removing heat from the battery cell 10 and cooling the battery cell 10.

[0162] Therefore, by setting the thermal conductivity of the heat exchange body 32 to be greater than that of the current collector 33, on the one hand, it is beneficial to improve the heat exchange efficiency by allowing the heat exchange medium to exchange heat with the battery cell 10 through the heat exchange body 32; on the other hand, it can reduce the heat of the heat exchange medium from diffusing to the outside through the current collector 33, thereby improving the heat insulation performance of the heat exchange component 30 and further improving the heat exchange efficiency.

[0163] It should be noted that there are multiple ways to divide the current collector 33 into a first main body part 331 and a second main body part 332.

[0164] For example, the current collector 33 can be split into a first main body 331 and a second main body 332 along the large surface, apply adhesive to the split interface, and then bond the first main body 331 and the second main body 332 together, further ensuring the mass production capability of the adhesive solution.

[0165] In some embodiments, please refer to Figure 10 The water inlet 35 is formed by the first main body 331 and the second main body 332, and the second main body 332 has a second cavity 3321. The flow collection cavity is formed by the first cavity 3312 and the second cavity 3321.

[0166] In other words, the first main body 331 and the second main body 332 together form the sprue 35. In other words, the first main body 331 forms a partial outline of the sprue 35, and the second main body 332 also forms a partial outline of the sprue 35.

[0167] For example, the first main body portion 331 and the second main body portion 332 are connected along a first direction.

[0168] For example, the sprue 35 may be a cylindrical tube. The cylindrical tube includes a first annular structure 351 disposed on the first main body portion 331 and a second annular structure 352 disposed on the second main body portion 332.

[0169] The first annular structure 351 and the second annular structure 352 can be symmetrically arranged or not.

[0170] For example, in some embodiments, a limiting part 353 is formed at the end of the first annular structure 351 that is away from the heat exchange body 32 in the height direction. After the first body part 331 is connected to the second body part 332, the limiting part 353 can limit the top of the second annular structure 352 in the height direction, which is beneficial to improving the connection reliability between the first body part 331 and the second body part 332.

[0171] In other embodiments, please refer to Figure 10 and Figure 11The second annular structure 352 has a limiting part 353 at the end away from the heat exchange body 32 in the height direction. After the first body part 331 and the second body part 332 are connected, the limiting part 353 can limit the top of the first annular structure 351 in the height direction, which is beneficial to improving the connection reliability between the first body part 331 and the second body part 332.

[0172] In some other embodiments, please refer to Figure 11 Alternatively, the second main body 332 can be divided into a first sub-part 3322 and a second sub-part 3323. The first sub-part 3322 forms the second cavity 3321, and the second sub-part 3323 can be a plate-like structure similar to an end plate, disposed at the end of the first sub-part 3322 opposite to the first main body 331. This helps to further reduce the molding difficulty of the second main body 332.

[0173] In this embodiment, after the first main body 331 and the second main body 332 are connected, the first main body 331 and the second main body 332 together form the sprue 35, which further facilitates demolding. The first cavity 3312 of the first main body 331 and the second cavity 3321 of the second main body 332 are connected and together form the flow collecting cavity, which facilitates the molding of the flow collecting fluid 33.

[0174] In some embodiments, please refer to Figures 8 to 9 The water inlet 35 is disposed on the first main body 331 and is connected to the first cavity 3312. The collecting cavity is formed separately by the first cavity 3312. The second main body 332 closes the other end of the first cavity 3312 in the first direction.

[0175] For example, the second main body portion 332 can be a plate-like structure similar to an end plate. This simplifies the structure of the second main body portion 332 and reduces the molding difficulty of the second main body portion 332.

[0176] For example, one end of the end plate near the first cavity 3312 protrudes to form a protrusion, which extends into the cavity of the first cavity 3312 and seals with the cavity wall of the first cavity 3312, which helps to improve the sealing performance between the first main body 331 and the second main body 332.

[0177] In this way, while facilitating the molding of the first main body 331, it also reduces the molding difficulty of the second main body 332 and facilitates the connection between the first main body 331 and the second main body 332.

[0178] In some embodiments, please refer to Figures 4 to 7 The second main body 332 contains a second cavity 3321. The first cavity 3312 and the second cavity 3321 together form a flow collecting cavity, and the water inlet 35 is formed in the second main body 332.

[0179] For example, the first main body portion 331 may be a ring-like structure.

[0180] Since the sprue 35 is formed in the second main body 332, it simplifies the structure of the first main body 331, making it easier to mold and reducing the molding difficulty of the first main body 331. Furthermore, it also reduces the processing difficulty of integrally injection molding the current collector onto the heat exchanger body 32 using overmolded injection molding.

[0181] In some embodiments, the second main body 332 has a second cavity 3321, the first cavity 3312 and the second cavity 3321 together form a flow collecting cavity, and the water inlet 35 is formed in the first main body 331.

[0182] For example, the second main body portion 332 may be a ring-like structure.

[0183] Since the sprue 35 is formed in the first main body 331, it not only facilitates the molding of the first main body 331, but also reduces the molding difficulty of the second main body 332.

[0184] In some embodiments, please refer to Figures 5 to 9 The first main body 331 is a two-color injection molded structure, which includes a plastic layer and a soft rubber layer disposed inside the plastic layer. The heat exchange body 32 is inserted into the soft rubber layer and is sealed with the soft rubber layer.

[0185] In other words, the first main body 331 is a two-color injection molded structure formed by a process of combining two different colors or materials of plastic into a single product through single or continuous injection molding.

[0186] Here, the specific material of the plastic layer can be any plastic available on the market, and will not be elaborated further.

[0187] For example, the hardness of the plastic layer is greater than that of the soft rubber layer.

[0188] The plastic layer has a certain degree of hardness so that the first main body 331 has a certain structural strength.

[0189] Here, the specific material of the soft rubber layer can be made of existing soft rubber on the market, and the details will not be elaborated further.

[0190] For example, the soft rubber layer is ring-shaped, and when the heat exchange body 32 is inserted into the first body portion 331, the soft rubber layer surrounds the heat exchange body 32 at least once, so as to seal the gap between the heat exchange body 32 and the plastic layer.

[0191] In this embodiment, by setting the first main body 331 as a two-color injection molded structure, the two-color injection molded structure includes a plastic layer and a soft rubber layer disposed inside the plastic layer. The plastic layer provides the first main body 331 with a certain structural strength, and the soft rubber layer improves the sealing performance between the heat exchange body 32 and the first main body 331, thereby achieving a reliable connection between the current collector 33 and the heat exchange body 32. This reduces the risk of poor reliability when the current collector 33 and the heat exchange body 32 are connected by welding or other processes. Therefore, by setting the first main body 331 as a two-color injection molded structure, this embodiment of the application improves the reliability of the connection between the current collector 33 and the heat exchange body 32, while also achieving a lightweight design of the heat exchange component 30 and reducing the processing difficulty of the heat exchange body 32.

[0192] In some embodiments, please refer to Figure 5 On the projection plane perpendicular to the first direction, the orthographic projection of the first cavity 3312 at least covers the orthographic projection of the medium flow channel 321.

[0193] Since the flow collection cavity is at least composed of the first cavity 3312 and the first cavity 3312 is connected to the medium flow channel 321, on the projection plane perpendicular to the first direction, by at least covering the orthogonal projection of the medium flow channel 321 with the orthogonal projection of the first cavity 3312, it is convenient for the first cavity 3312 to be connected to the medium flow channel 321. In addition, when the first main body 331 is directly encapsulated and injection molded onto the heat exchange body 32, the mold core of the mold used for injection molding the first main body 331 can block the medium flow channel 321 during the molding process, improving the situation of the injection slurry entering the medium flow channel 321, and making it easier for the mold core to be extracted from the first cavity 3312, thereby improving the convenience and reliability of molding.

[0194] In some embodiments, please refer to Figure 5 On the projection plane perpendicular to the first direction, the projection of the first cavity 3312 covers the projection of the end face of the heat exchange body 32.

[0195] This helps to reduce the heat transfer efficiency of the first cavity 3312, thereby improving the diversion and / or convergence of the heat transfer media in the multiple media channels 321. Furthermore, it facilitates the extraction of the mold core from the first cavity 3312, improving the convenience and reliability of molding.

[0196] It should be noted that the specific structure of the first main body 331 is not described here. The first main body 331 can be a one-piece structure or a split structure.

[0197] In some embodiments, please refer to Figures 6 to 7 The first main body 331 includes at least two sub-connecting parts 3311.

[0198] In other words, the first main body 331 is composed of at least two sub-connecting parts 3311, and the first cavity 3312 is formed by the at least two sub-connecting parts 3311. This further facilitates the extraction of the mold core from the first cavity 3312. In addition, it facilitates the application of adhesive, so that the first main body 331 is bonded to the heat exchange body 32, or the first main body 331 is bonded to the second main body 332.

[0199] It should be noted that there are multiple ways to divide the heat exchange body 32 into at least two sub-connection parts 3311.

[0200] In some embodiments, please refer to Figure 6 There are two sub-connection parts 3311, and the two sub-connection parts 3311 are joined together along the thickness direction of the heat exchange body 32, which is perpendicular to the first direction.

[0201] For example, the two sub-connection portions 3311 may be symmetrically arranged along the thickness direction of the heat exchange body 32, or they may not be symmetrically arranged.

[0202] In other embodiments, please refer to Figure 7 At least two sub-connecting parts 3311 are joined together along the width direction of the heat exchange body 32, and the width direction is perpendicular to the first direction.

[0203] It can be two sub-connecting parts 3311 joined together along the width direction of the heat exchange body 32, or more than two sub-connecting parts 3311 joined together along the width direction of the heat exchange body 32.

[0204] In an embodiment where there are two sub-connection portions 3311, the two sub-connection portions 3311 may be symmetrically arranged along the width direction of the heat exchange body 32, or they may not be symmetrically arranged.

[0205] In some embodiments, the edge of the end face of the first main body portion 331 facing away from the second main body portion 332 is formed into an arc surface.

[0206] The arc surface can be formed by rounding the edges of the end face of the first main body 331.

[0207] The arc surface helps to improve the problem of failure caused by excessive local stress between the first main body 331 and the heat exchange body 32, thereby improving the connection strength between the collector 33 and the heat exchange body 32.

[0208] In some embodiments, the heat exchanger 31 includes a blocking member disposed within a portion of the medium flow channel 321 for blocking the corresponding medium flow channel 321.

[0209] The circumferential sidewall of the sealing component is sealed to the sidewall of the corresponding medium flow channel 321.

[0210] For example, the sealing element may be in the form of a block.

[0211] In this embodiment, by providing a sealing component, the corresponding medium flow channel 321 can be sealed as needed. Furthermore, during the process of directly overmolding and injection molding the first main body 331 onto the heat exchange body 32, the sealing component can support the medium flow channel 321 of the heat exchange component 31, and simultaneously seal the medium flow channel 321.

[0212] The above embodiments are merely illustrative of the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and all should be covered within the scope of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of this application.

Claims

1. A battery device, characterized in that, include: Box; Multiple battery cells are disposed inside the housing; A heat exchange assembly includes at least one heat exchange element, the heat exchange element includes a heat exchange body and a collector, the heat exchange body is provided with a plurality of medium flow channels inside, the collector is provided at at least one end of the heat exchange body along a first direction, the collector is provided with a collection cavity, and the collection cavity is configured to split and / or merge the heat exchange medium in the plurality of medium flow channels. The current collector includes a first main body and a second main body connected to the first main body. The first main body is at least partially made of plastic. One end of the first main body is connected to the end of the heat exchange body in a first direction. The first main body has a first cavity extending through in the first direction. The first cavity communicates with the medium flow channel. The first cavity forms an opening at the other end in the first direction. The second main body is connected to the first main body to close the opening of the first main body. The flow collection cavity is at least composed of the first cavity. The heat exchanger also includes a water inlet, which communicates with the flow collection cavity.

2. The battery device according to claim 1, characterized in that, The current collector is a non-metallic component.

3. The battery device according to claim 1, characterized in that, The current collector is a plastic part.

4. The battery device according to claim 1, characterized in that, The thermal conductivity of the heat exchanger body is greater than that of the current collector.

5. The battery device according to claim 1, characterized in that, The water inlet is formed by the first main body and the second main body, and the second main body has a second cavity. The flow collection cavity is formed by the first cavity and the second cavity.

6. The battery device according to claim 1, characterized in that, The water inlet is located on the first main body and is connected to the first cavity. The collecting cavity is formed separately by the first cavity. The second main body closes the other end of the first cavity in the first direction.

7. The battery device according to claim 1, characterized in that, The second main body has a second cavity, and the first cavity and the second cavity together form the flow collecting cavity. The water inlet is formed in the second main body, or... The second main body has a second cavity, and the first cavity and the second cavity together form the flow collecting cavity, and the water inlet is formed in the first main body.

8. The battery device according to any one of claims 1-7, characterized in that, The first main body and the heat exchange body are connected by at least one of plug-in connection, overmolded injection molding, or adhesive connection.

9. The battery device according to any one of claims 1-7, characterized in that, The first main body is a two-color injection molded structure, which includes a plastic layer and a soft rubber layer disposed inside the plastic layer. The heat exchange body is inserted into the soft rubber layer and is sealed with the soft rubber layer.

10. The battery device according to any one of claims 1-7, characterized in that, The second main body is connected to the first main body by at least one of adhesive bonding, welding, or snap-fit ​​connection.

11. The battery device according to any one of claims 1-7, characterized in that, On a projection plane perpendicular to the first direction, the orthographic projection of the first cavity at least covers the orthographic projection of the medium flow channel.

12. The battery device according to any one of claims 1-7, characterized in that, On a projection plane perpendicular to the first direction, the projection of the first cavity covers the projection of the end face of the heat exchange body.

13. The battery device according to any one of claims 1-7, characterized in that, The first main body includes at least two sub-connecting parts.

14. The battery device according to claim 13, characterized in that, The number of sub-connecting parts is two, and the two sub-connecting parts are joined together along the thickness direction of the heat exchange body, which is perpendicular to the first direction.

15. The battery device according to claim 13, characterized in that, The at least two sub-connecting portions are joined together along the width direction of the heat exchange body, and the width direction is perpendicular to the first direction.

16. The battery device according to any one of claims 1-7, characterized in that, The edge of the end face of the first main body portion facing away from the second main body portion forms an arc surface.

17. The battery device according to any one of claims 1-7, characterized in that, The heat exchanger includes a sealing element, which is disposed within a portion of the medium flow channel and is used to seal the corresponding medium flow channel.

18. A heat exchange component, characterized in that, The heat exchange assembly includes at least one heat exchange element, the heat exchange element includes a heat exchange body and a collector, the heat exchange body is provided with multiple medium flow channels inside, the collector is provided at at least one end of the heat exchange body along a first direction, the collector is provided with a collection cavity, and the collection cavity is configured to split and / or merge the heat exchange medium in the multiple medium flow channels. The current collector includes a first main body and a second main body connected to the first main body. The first main body is at least partially made of plastic. One end of the first main body is connected to the end of the heat exchange body in a first direction. The first main body has a first cavity extending through in the first direction. The first cavity communicates with the medium flow channel. The first cavity forms an opening at the other end in the first direction. The second main body is connected to the first main body to close the opening of the first main body. The flow collection cavity is at least composed of the first cavity. The heat exchanger also includes a water inlet, which communicates with the flow collection cavity.

19. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1 to 17 or the heat exchange assembly according to claim 18.

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