Battery devices and electrical devices

Abstract

The present application relates to the field of battery heat exchange technology, specifically disclosing a battery device (100) and an electric device (1000). The battery device (100) comprises a case (110), a battery cell assembly (120), and a heat exchanger (400). The battery cell assembly (120) and the heat exchanger (400) are installed within the case (110) to perform heat exchange. The heat exchanger (400) comprises a heat exchange tube (410), a connection part (420), and a collection body (430). The heat exchange tube (410) comprises a plurality of heat exchange passages (411). The connection part (420) is fitted to one end of the heat exchange tube (410), and a plurality of connection passages (421) are installed in the connection part (420). The collection body (430) is fixed to the connection part (420), and a collection port (431) and at least one guide passage (435) are installed in the collection body (430). There is, and the collection port (431) is connected to at least one heat exchange passage (411), and at least two heat exchange passages (411) are connected through a guide passage (435) and a connecting passage (421) to form a heat exchange circuit (450) having at least one bend (451).

Description

Technology Field

[0001] The present application claims priority to Chinese patent application No. "202423017858.7" filed by Contemporary Amperex Technology Co., Ltd. on December 6, 2024, and priority to Chinese patent applications No. "202410501046.5" and "202420869133.1" filed on April 24, 2024, the entire contents of the above Chinese patent applications are incorporated into the present application by reference.

[0002] This application relates to the field of battery heat exchange technology, and in particular to battery devices and electric devices. Background Technology

[0003] Battery devices are increasingly widely applied in daily life and industry as rechargeable power sources; when applied to new energy vehicles, they are primarily used to provide power and serve as the power source for the vehicles.

[0004] Here, a heat exchanger is typically installed within the battery unit to ensure that the battery unit maintains its temperature within an appropriate temperature range during use; however, conventional heat exchangers are difficult to assemble, have poor assembly quality, and offer poor heat exchange efficiency, which affects the safety of the battery unit and electrical devices. The problem to be solved

[0005] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the first aspect of the present application provides a battery device, said battery device can reduce the difficulty of assembling a heat exchanger and improve the quality of assembly while simultaneously improving the heat exchange effect of the heat exchanger, thereby solving the technical problems in the prior art where assembling a heat exchanger is difficult, the quality of assembly is poor, and the heat exchange effect is poor.

[0006] A second aspect of the present application provides an electric device having the battery device described above. means of solving the problem

[0007] In a first aspect, an embodiment of the present application provides a battery device, wherein the battery device comprises: a case; a battery cell assembly installed within the case; and a heat exchanger installed within the case and configured to perform heat exchange with the battery cell assembly; wherein the heat exchanger comprises: a heat exchange tube having a plurality of heat exchange passages; a connection part fitted at one end of the heat exchange tube and having a plurality of connection passages; and a collection body fixed to the connection part and having a collection port and at least one guide passage installed therein; wherein the collection port communicates with at least one of the heat exchange passages, and at least two of the heat exchange passages communicate through the guide passage and the connection passage to form a heat exchange circuit having at least one bend.

[0008] In some embodiments, a plurality of the connection passages and a plurality of the heat exchange passages are connected in a one-to-one correspondence, and the guide passage is connected in correspondence with at least two of the connection passages, so that at least two of the heat exchange passages are connected through the guide passage to form a heat exchange circuit having at least one bend. By lowering the molding difficulty of the heat exchange circuit having the bend, a series connection of at least two heat exchange passages is implemented, allowing the heat exchange medium entering the heat exchange tube to sequentially enter the at least two heat exchange passages, thereby increasing the residence time of the heat exchange medium within the heat exchange tube and the coverage area for the battery cell assembly, and to some extent preventing a large temperature difference between the inlet and outlet of the heat exchange circuit, thereby improving the heat exchange uniformity of the heat exchange tube and satisfying the uniform temperature requirements of the battery cell assembly.

[0009] In some embodiments, the connecting portion and the collecting body are installed at both ends of the heat exchange tube; each collecting body includes a communication passage communicating with the collecting port, each guide passage and the communication passage are independent of each other and are not communicating, and each guide passage has two bypass holes installed at a distance; the communication passage of each collecting body communicates with one of the heat exchange passages through the connecting passage; each guide passage of each collecting body communicates with two of the heat exchange passages through two of the bypass holes so that two of the heat exchange passages are communicating, and the bending portion is formed between the heat exchange passage and the guide passage. Accordingly, when a heat exchange medium is discharged into the collection port of one of the collection bodies, it can be transported to a connecting passage through the collection port. Since the connecting passage and the guide passage are installed at a distance and the connecting passage is connected to one of the heat exchange passages through a connecting passage, the heat exchange medium transported to the connecting passage flows into the heat exchange passage along the extension direction of the connecting passage and can also flow into the guide passage of another collection body along the heat exchange passage. This allows the heat exchange medium that has entered the heat exchange tube to sequentially enter at least two heat exchange passages, thereby increasing the residence time of the heat exchange medium within the heat exchange tube and the coverage area for the battery cell assembly, preventing a large temperature difference between the inlet and outlet of the heat exchange circuit to some extent, and satisfying the uniform temperature requirements of the battery cell assembly.

[0010] In some embodiments, the connection part is an injection-molded member, and the collector is fixedly connected to the connection part. By lowering the molding difficulty of the connection part, the collector is fixedly connected to the heat exchange tube using the connection part, thereby achieving the objective of lowering the assembly difficulty of the collector and the heat exchange tube, improving the connection quality between the collector and the heat exchange tube, preventing leakage, and improving the heat exchange effect of the heat exchanger.

[0011] In some embodiments, the heat exchanger is a metal member, and the connection is double injection molded into the heat exchanger to form an integral member with the heat exchanger. Thus, by implementing a fitting connection between the connection and the heat exchanger, the difficulty of connecting the connection and the heat exchanger is reduced, while the connection strength between the connection and the heat exchanger can be guaranteed to some extent. Additionally, by improving the sealing and pressure resistance of the connection portion between the connection and the heat exchanger, the connection can be stably installed at one end of the heat exchanger, thereby making it easy to fix-connect the collector to the heat exchanger using the connection.

[0012] In some embodiments, the connection part is a plastic member. On the one hand, the connection part can be double injection molded into the heat exchanger tube to form an integral member with the heat exchanger tube, thereby lowering the difficulty of connecting the connection part to the heat exchanger; on the other hand, the weight of the connection part can be reduced and the manufacturing cost of the connection part can be lowered.

[0013] In some embodiments, a first region is installed on the outer surface of the heat exchange tube, the roughness of the first region is greater than the roughness of the remaining region, and the first region is in contact with the connection part. Therefore, by increasing the bonding force between the heat exchange tube and the connection part using the first region, the connection strength between the heat exchange tube and the connection part is increased, thereby enabling the connection part to be stably installed on the heat exchange tube, making it easy to stably connect the collector to the heat exchange tube using the connection part.

[0014] In some embodiments, the connection portion includes an outer collar and a connection plate, wherein the outer collar is fitted to one end of the heat exchange tube, the connection plate is installed within the outer collar, the plurality of connection passages penetrate the connection plate, and the outer collar and / or the connection plate are double injection molded into the heat exchange tube. Accordingly, by implementing double injection molding of the connection portion into the heat exchange tube, the difficulty of connecting the connection portion and the heat exchange tube is reduced, and the sealing and pressure resistance of the connection portion between the connection portion and the heat exchange tube are improved.

[0015] In some embodiments, the connection part and the collection body are connected by welding or adhesive. This lowers the difficulty of connecting the connection part and the collection body while simultaneously improving the connection strength between the connection part and the collection body, thereby allowing the connection part and the collection body to form a stable connection. This makes it easier to fix the collection body to the heat exchanger tube using the connection part, is advantageous for improving the sealing performance of the connection area between the connection part and the collection body, and allows the installation of a sealing member to be omitted.

[0016] In some embodiments, the culvert is a plastic member. This is intended to reduce the weight of the culvert and lower the manufacturing cost of the culvert, while simultaneously being advantageous for lowering the difficulty of connecting the culvert and the connecting part.

[0017] In some embodiments, the height of the collection ports of the collection body located at both ends of the heat exchange tube is the same. Therefore, the connection between the collection ports at both ends of the heat exchange tube and external elements is easy, and the difficulty of connection is reduced. Consequently, it is easy to transport the heat exchange medium toward the heat exchange tube using the collection ports or to discharge the heat exchange medium within the heat exchange tube through the collection ports, thereby enabling the heat exchange medium to flow effectively within the heat exchange tube and ensuring the heat exchange effect of the heat exchange tube to some extent.

[0018] In some embodiments, the battery device comprises a plurality of battery cell assemblies and a plurality of heat exchangers, wherein the plurality of battery cell assemblies are arranged in a plurality of rows, and the battery cell assemblies of each row are installed between two adjacent heat exchangers.

[0019] In a second aspect, the present application provides an electric device comprising the aforementioned battery device, said battery device used to provide electric energy. Effects of the invention

[0020] In the technical solution of the embodiment of the present application, by installing a heat exchanger and installing the heat exchanger to include a connection part, the collection body can be easily assembled to the heat exchange tube using the connection part, thereby lowering the difficulty of assembling the collection body and the heat exchange tube, and is advantageous for improving the assembly quality of the collection body and the heat exchange tube, and reducing the risk of leakage at the connection part between the collection body and the heat exchange tube, while also facilitating the independent processing of the collection body and the connection part. Accordingly, it is easy to form a heat exchange circuit having at least one bending part within the heat exchanger using the collection body and the connection part, thereby improving the heat exchange effect of the heat exchanger, satisfying the uniform temperature demand of the battery device, further reducing the risk of thermal runaway occurring in the battery device, improving the safety of use of the battery device, and extending the service life of the battery device. In other words, the battery device of the present application can lower the difficulty of assembling the collection body and the heat exchange tube of the heat exchanger and improve the assembly quality, while simultaneously improving the heat exchange effect of the heat exchanger.

[0021] In the technical solution of the embodiment of the present application, by using a battery device according to the above-described embodiment, the operating performance of the electric device can be guaranteed to some extent, the safety of use of the electric device can be improved, and the service life of the electric device can be extended.

[0022] Additional aspects and advantages of the present application will become clear from the description below or will be known through the practice of the present application. Brief explanation of the drawing

[0023] In order to explain the technical method of the embodiments of the present application more clearly, the drawings to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings merely illustrate some embodiments of the present application and should not be construed as limiting the scope, and those skilled in the art may obtain other related drawings based on these drawings within the scope of ordinary creative ability. FIG. 1 is a schematic diagram of an electric device according to some embodiments of the present application. FIG. 2 is an exploded view of a battery device according to some embodiments of the present application. FIG. 3 is an exploded view of a heat exchanger according to some embodiments of the present application. Figure 4 is a partial enlarged view of the heat exchanger in Figure 3. Figure 5 is a schematic diagram of a part of the structure of the heat exchanger in Figure 3. FIG. 6 is a top view of a heat exchanger according to some embodiments of the present application. Figure 7 is a cross-sectional view along line AA of Figure 6. FIG. 8 is an exploded view of a heat exchanger according to another embodiment of the present application. Figure 9 is an enlarged view of area I of Figure 8. FIG. 10 is a top view of a heat exchanger according to another embodiment of the present application. Figure 11 is a cross-sectional view along the BB line of Figure 10. Figure 12 is an exploded view of a part of the structure of the heat exchanger of Figure 10. Figure 13 is a cross-sectional view along the CC line of Figure 12. Specific details for implementing the invention

[0024] In order to provide a clearer understanding of the purpose, technical solution, and advantages of the embodiments of the present application, the technical solution according to the embodiments of the present application will be clearly explained below in conjunction with the drawings of the embodiments of the present application. It will be obvious that the embodiments described are only some embodiments of the present application, not all embodiments. All other embodiments obtained by a person skilled in the art without creative labor based on the embodiments of the present application fall within the scope of protection of the present application.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art of this application; terms used in the specification of this application are used merely for the purpose of describing specific embodiments and are not intended to limit this application; and terms such as “include” and “have” and any variations thereof used in the specification, claims, and description of the drawings of this application are intended to encompass non-exclusive inclusion. Terms such as “first,” “second,” etc., in the specification and claims of this application or in the drawings of this application are used to distinguish different objects, not to describe a specific order or master-slave relationship.

[0026] The term "Examples" as used in this application means that specific features, structures, or characteristics described by combining examples may be included in at least one of the embodiments of this application. The words appearing in various places in this specification do not necessarily refer to the same embodiment, nor are they independent embodiments or alternative embodiments mutually exclusive from other embodiments. Those skilled in the art will understand, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments.

[0027] In describing this application, unless otherwise clearly defined and limited, the terms “mounting,” “connecting,” “connection,” and “attachment” are to be understood in a broad sense and may, for example, be a fixed connection, a detachable connection, or an integral connection; may be a direct connection, an indirect connection via an intermediate medium, or an internal connection between two elements. Those skilled in the art will understand the specific meaning of the aforementioned terms in this application according to the specific circumstances.

[0028] In this application, the term "and / or" merely describes an association describing related objects and indicates that three relationships may exist; for example, A and / or B may represent three cases: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the symbol " / " generally indicates that the preceding and succeeding related objects are in an "or" relationship.

[0029] In the embodiments of this application, the same drawing symbols denote the same parts, and for brevity, detailed descriptions of the same parts in other embodiments are omitted. It should be understood that the dimensions, such as thickness, length, and width, of the various parts of the embodiments of this application illustrated in the drawings, and the dimensions, such as the overall thickness, length, and width, of the integrated device, are merely illustrative and should not constitute any limitation to this application.

[0030] The term "plural" as used in this application refers to two or more (including two).

[0031] Currently, considering the development of the market landscape, battery devices are being applied more widely. Battery devices are not only used in energy storage power systems such as hydroelectric, thermal, wind, and solar power plants, but are also widely applied in various fields including electric transportation (such as electric bicycles, motorcycles, and vehicles), military equipment, and aerospace.

[0032] As the application fields of battery devices continue to expand, market demand is also continuously increasing.

[0033] When the battery device operates, a large amount of heat is generated due to positive and negative discharges of the battery cells and chemical reactions of the electrolyte inside the battery cells, causing a rise in the temperature of the battery cells.

[0034] In conventional technology, to lower the temperature of a battery cell, a heat exchanger is typically installed within a battery device, and by using the heat exchanger to exchange heat with the battery cell, the temperature of the battery cell is maintained within an appropriate temperature range, thereby ensuring the operational performance of the battery cell to some extent, extending the service life of the battery cell, and improving the safety of the battery cell's use.

[0035] Here, the heat exchanger generally includes a liquid inlet collector, a liquid outlet collector, and a heat exchange tube installed between the liquid inlet collector and the liquid outlet collector; a heat exchange medium is introduced into the heat exchange tube through the liquid inlet collector, the heat exchange medium circulates within the heat exchange tube and is discharged from the liquid outlet collector, the heat exchange medium is a fluid, and the fluid may be a cooling medium or a heating medium, and the fluid circulates within the heat exchange tube to perform heat exchange with the battery cell, thereby achieving the purpose of controlling the temperature of the battery device.

[0036] However, the applicant discovered that since multiple heat exchange passages within a conventional heat exchange tube all transport the heat exchange medium in a parallel connection manner, the temperature difference of the heat exchange medium at both ends of the heat exchange passage is relatively large, and furthermore, the heating of the battery cell becomes uneven, which affects the heat exchange effect.

[0037] Furthermore, since chamfers exist on the edges of the heat exchange tubes, welding the heat exchange tubes with the liquid inlet and outlet collectors is difficult, and direct welding increases the risk of leakage. Additionally, if the heat exchange tubes with the liquid inlet and outlet collectors are injection molded as a single unit, the presence of bypass requirements within the collectors makes demolding relatively difficult, affecting the molding quality and efficiency of the heat exchanger.

[0038] To solve the above-mentioned problem, by combining the methods illustrated in FIGS. 1 to 13, an embodiment of the present application provides a battery device (100), and a heat exchanger (400) within the battery device (100) may reduce the difficulty of assembly of a collection body (430) and a heat exchange tube (410) while simultaneously improving the heat exchange effect of the heat exchange tube (410). A specific method is to install the heat exchanger (400) to include a heat exchange tube (410), a connecting part (420), and a collection body (430), and the connecting part (420) is fitted to one end of the heat exchange tube (410) and the collection body (430) is fixed to the connecting part (420), thereby implementing a fitting connection between the collection body (430) and the heat exchange tube (410) through the connecting part (420), so as to reduce the difficulty of assembly of the collection body (430) and the heat exchange tube (410), and thus the assembly of the heat exchanger (400). The purpose of lowering the difficulty is achieved, and the above-described connection method may also improve the fitting strength of the collection body (430) and the heat exchanger (410) and reduce the risk of leakage at the connection point between the collection body (430) and the heat exchanger (410); At the same time, the collecting body (430) can be connected to the heat exchanger (410) through the connecting part (420) and then formed so that the collecting body (430) is formed independently, making it easy to install the collecting body (430) to have a collecting port (431) and at least one guide passage (435), and accordingly, using the collecting body (430) and the connecting part (420), it is easy to form a heat exchange circuit (450) having at least one bending part (451) within the heat exchanger (410), thereby improving the heat exchange effect of the heat exchanger (400), satisfying the uniform temperature requirements of the battery cell assembly (120), and further reducing the risk of thermal runaway occurring in the battery device (100), improving the safety of use of the battery device (100), and extending the service life of the battery device (100).

[0039] An embodiment of the present application further provides an electric device (1000) that uses the battery device (100) of the present application as a power source, and the electric device (1000) may be a mobile phone, tablet, laptop, electric toy, power tool, electric bicycle, electric vehicle, ship, space equipment, etc., but is not limited thereto.

[0040] Here, electric toys may include stationary or mobile electric toys such as, for example, game consoles, electric car toys, electric ship toys, and electric airplane toys; space equipment may include airplanes, rockets, space shuttles, and spacecraft; and power tools include, for example, 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, electric impact drills, concrete vibrators, and electric planers.

[0041] For convenience of explanation, in the following embodiments, the structure of the electric device (1000) and battery device (100) of the present application is described in detail, using the case where the electric device (1000) is a vehicle as an example.

[0042] Referring to FIG. 1, the electric device (1000) may be a vehicle, and the vehicle may be a fuel vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery device (100) is installed in the vehicle, and the battery device (100) may be installed in the bottom, head, or tail of the vehicle. The battery device (100) may be used to supply power to the vehicle, and for example, the battery device (100) may be used as the working power source for the vehicle.

[0043] As illustrated in FIG. 1, the vehicle may also include a controller (200) and a motor (300), and the controller (200) is used to control the battery device (100) to supply power to the motor (300), for example, to supply power required for the operation, navigation, and driving of the vehicle.

[0044] In some embodiments of the present application, the battery device (100) may be used as a working power source for the vehicle, as well as as a driving power source for the vehicle, and may provide driving power to the vehicle by replacing or partially replacing fuel or natural gas.

[0045] Hereinafter, a battery device (100) according to an embodiment of the present application is described with reference to the drawings in the specification.

[0046] Combining what is shown in FIGS. 2 and FIGS. 3, the battery device (100) includes a case (110), a battery cell assembly (120), and a heat exchanger (400).

[0047] Here, as illustrated in FIG. 2, the battery cell assembly (120) is installed within the case (110). Thus, by using the case (110), it is possible to support and protect the battery cell assembly (120), improve the structural stability of the battery cell assembly (120), extend the service life of the battery cell assembly (120), and improve the safety of use of the battery cell assembly (120).

[0048] In some embodiments, as shown in FIG. 2, the case (110) may include a first part (113) and a second part (114), the first part (113) and the second part (114) are joined together and the first part (113) and the second part (114) jointly form a limited receiving chamber used to accommodate a battery cell assembly (120) and a heat exchanger (400), thereby reducing the molding difficulty of the case (110).

[0049] Here, the first part (113) may be a hollow structure with one end open, and the second part (114) may be a plate-shaped structure, and the second part (114) may be fitted and joined to the open side of the first part (113) (an example not shown in the drawing) so that the first part (113) and the second part (114) jointly form a limited receiving chamber; or, the second part (114) may be a hollow structure with one end open, and the first part (113) may be a plate-shaped structure (an example not shown in the drawing), and the first part (113) may be fitted and joined to the open side of the second part (114), so that the first part (113) and the second part (114) can jointly form a limited receiving chamber even if they are fitted together; Alternatively, as shown in FIG. 2, the first part (113) and the second part (114) are both hollow structures with one side open, and the open side of the first part (113) is covered and joined to the open side of the second part (114) to form a limited receiving chamber, and the case (110) formed by the first part (113) and the second part (114) may have various shapes such as a cylinder, a cube, or a rectangular prism.

[0050] Of course, in some other embodiments of the present application, the battery device (100) may not include a case (110) and may include only a battery cell assembly (120) and a heat exchanger (410), and redundant description is omitted here.

[0051] The battery device (100) mentioned in the embodiments of the present application refers to a single physical module that includes a plurality of battery cells to provide a higher voltage and capacity. For example, the battery device (100) mentioned in the present application may be a battery cell assembly (120) or a plurality of battery cells. A battery cell assembly (120) generally includes a plurality of battery cells. The battery device (100) generally includes a case (110) used to package a plurality of battery cell assemblies (120) or a plurality of battery cells, and the case (110) can prevent liquid or other foreign substances from affecting the charging or discharging of the battery cells to some extent.

[0052] Further explanation is that in the battery device (100), a plurality of battery cell assemblies (120) may be connected in series, parallel, or a mixed series-parallel connection, and a mixed series-parallel connection refers to a plurality of battery cell assemblies (120) having both a series connection and a parallel connection, and the plurality of battery cell assemblies (120) may be directly connected in series, parallel, or a mixed series-parallel connection, and then an integrated body composed of a plurality of battery cell assemblies (120) may be accommodated in a case (110).

[0053] In some embodiments, as illustrated in FIG. 2, the battery device (100) includes a plurality of groups of battery cell assemblies (120), and in the assembly process of the battery device (100), the battery device (100) may first configure a plurality of battery cells into a battery cell assembly (120) by connecting them in series, parallel, or a combination of series and parallel, and then connect the plurality of battery cell assemblies (120) in series, parallel, or a combination of series and parallel to form a single integrated body and accommodate it in a case (110).

[0054] In some embodiments, the battery device (100) may also include other structures, for example, the battery device (100) may also include electrical connection members used to implement electrical connections between a plurality of battery cell assemblies (120).

[0055] Among them, the electrical connection member mentioned here can be understood as a bus bar.

[0056] Additionally, a battery cell formed as a rectangular parallelepiped is illustrated in FIG. 2. In other embodiments of the present application, the battery cell may also be cylindrical, polygonal, flat, or have other shapes.

[0057] In this application, the battery cell may include a lithium-ion secondary battery, a lithium-ion primary battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, and the embodiments of this application are not limited thereto. The battery cell may be cylindrical, flat, rectangular, or have other shapes, and the embodiments of this application are not limited thereto. Battery cells are generally classified into three types based on the packaging method: cylindrical battery cells, rectangular battery cells, and soft-pack battery cells, and the embodiments of this application are not limited thereto.

[0058] For example, a battery cell may typically comprise a housing, a battery cell assembly, and an electrolyte, the housing being used to accommodate the battery cell assembly and the electrolyte, and at least one positive electrode and at least one negative electrode being installed in the housing. The battery cell assembly comprises one or more electrode assemblies, the electrode assembly being formed by laminating or winding a positive plate, a negative plate, and a separator.

[0059] Here, the positive plate may generally include a positive current collector and a positive active material layer, and the positive active material layer is coated directly or indirectly on the positive current collector, and a plurality of positive tab plates are stacked together to form an electrical connection with the positive electrode column. For example, the plurality of positive tab plates stacked together may be directly welded to the positive electrode column to form an electrical connection; or, the battery cell assembly may also include a positive connection plate, so that the plurality of positive tab plates stacked together are welded to one end of the positive connection plate and the other end of the positive connection plate is welded to the positive electrode column, thereby allowing the positive tab plates to form an electrical connection with the positive electrode column.

[0060] The cathode plate may generally include a cathode current collector and a cathode active material layer, and the cathode active material layer is coated directly or indirectly on the cathode current collector, and a plurality of cathode tab plates are stacked together to form an electrical connection with the cathode column. For example, a plurality of cathode tab plates stacked together may be directly welded to the cathode column to form an electrical connection; or, the battery cell assembly may also include a cathode connection plate, so that a plurality of cathode tab plates stacked together are welded to one end of the cathode connection plate and the other end of the cathode connection plate is welded to the cathode column, thereby allowing the cathode tab plates to form an electrical connection with the cathode column. The material of the separator may be, for example, polypropylene or polyethylene, but is not limited thereto.

[0061] A heat exchanger (400) is installed within a case (110) and configured to perform heat exchange with a battery cell assembly (120). By implementing the adjustment of the temperature of the battery cell assembly (120) using a heat exchanger tube (410), the temperature of the battery cell assembly (120) can be maintained within an appropriate temperature range. Accordingly, the service life of the battery cell assembly (120) can be extended, and the safety of use of the battery cell assembly (120) can be improved.

[0062] It needs to be explained that the heat exchange between the heat exchanger (400) and the battery cell assembly (120) disclosed in the embodiment of the present application can be used for cooling or heating the battery cell assembly (120). In other words, the heat exchanger (400) can lower the temperature of the battery cell assembly (120) and can also heat the battery cell assembly (120) operating in a low-temperature environment to raise its temperature, thereby allowing the temperature of the battery cell assembly (120) to reach the operating range temperature and supply power normally.

[0063] Here, combining the features shown in FIGS. 3 to 13, the heat exchanger (400) according to an embodiment of the present application includes a heat exchange tube (410), a connecting part (420), and a collecting body (430).

[0064] Combining the details shown in FIGS. 5, 6, and 7, the heat exchanger (410) includes a plurality of heat exchange passages (411). The heat exchange passages (411) are primarily used to fill a heat exchange medium, which facilitates heat exchange between the heat exchanger (410) and the battery cell assembly (120), thereby achieving the purpose of adjusting the temperature of the battery cell assembly (120) using the heat exchanger (400), reducing the risk of thermal runaway occurring in the battery cell assembly (120), and ensuring the operational performance of the battery cell assembly (120) to some extent.

[0065] In some embodiments, as shown in FIGS. 3 and FIGS. 8, the heat exchange tube (410) may be in the shape of a flat tube, and the cross-section of the heat exchange passage (411) may be in a general shape such as a circle, rectangle, or ellipse, or other irregular shape.

[0066] When combined with what is shown in FIGS. 3, 5, and 6, the connecting part (420) is fitted to one end of the heat exchange tube (410), and a plurality of connecting passages (421) are installed in the connecting part (420).

[0067] It needs to be explained that fitting the connecting part (420) to one end of the heat exchange tube (410) is advantageous for stabilizing the relative position of the connecting part (420) and the heat exchange tube (410) by improving the connection strength between the connecting part (420) and the heat exchange tube (410), compared to fitting the end of the connecting part (420) and the end of the heat exchange tube (410) together, while simultaneously increasing the contact area between the connecting part (420) and the heat exchange tube (410).

[0068] In some embodiments, a plurality of connection passages (421) are installed to correspond to a plurality of heat exchange passages (411), and in this way, when the connection part (420) is inserted into one end of the heat exchange tube (410), it is easy to transport the heat exchange medium into the heat exchange passages (411) using the plurality of connection passages (421), thereby ensuring the operational performance of the heat exchange tube (410) to some extent.

[0069] When combined with the features shown in FIGS. 3, 4, 6 and 7, a collection body (430) is fixed to a connection part (420), and a collection port (431) and at least one guide passage (435) are installed in the collection body (430). The collection port (431) is in communication with at least one heat exchange passage (411), and at least two heat exchange passages (411) are in communication through the guide passage (435) and the connection passage (421) to form a heat exchange circuit (450) having at least one bend (451).

[0070] Here, the specific flow direction of the heat exchange medium in the heat exchange circuit (450) can be referenced to the dotted line extension direction shown in FIG. 7 and FIG. 11.

[0071] What needs to be explained is that by installing a collection port (431) to communicate with at least one heat exchange passage (411), the heat exchange medium is transported into the heat exchange passage (411), that is, the heat exchange medium is transported into the heat exchange tube (410), and by connecting at least two heat exchange passages (411) through a guide passage (435) and a connecting passage (421) to form a heat exchange circuit (450) having at least one bend (451), the heat exchange medium entering the heat exchange tube (410) is sequentially entered into at least two heat exchange passages (411), thereby enabling serial connection of at least two heat exchange passages (411). Accordingly, the residence time of the heat exchange medium within the heat exchange tube (410) and the coverage area for the battery cell assembly (120) are increased, and the temperature difference between the inlet and outlet of the heat exchange circuit (450) is prevented to some extent. The heat exchange uniformity of the heat exchanger tube (410) is improved, the phenomenon of non-uniform heat exchange of the battery cell assembly (120) is improved, the uniform temperature demand of the battery cell assembly (120) is met, furthermore, the risk of thermal runaway occurring in the battery device (100) is reduced, the safety of use of the battery device (100) is improved, and the lifespan of the battery device (100) is extended.

[0072] In some embodiments, the collection port (431) is connected to at least one connection passage (421), and since the connection passage (421) is connected to a heat exchange passage (411), the connection between the collection port (431) and at least one heat exchange passage (411) can be implemented, thereby reducing the difficulty of connecting the collection port (431) and the heat exchange passage (411).

[0073] It should be noted that the heat exchanger (400) of the present application is equipped with a connecting part (420), and the connecting part (420) is fitted to one end of the heat exchange tube (410), and a collecting body (430) is fixed to the connecting part (420), thereby implementing a method of fixing the collecting body (430) to the heat exchange tube (410) using the connecting part (420). Compared to directly fixing the collecting body (430) to the heat exchange tube (410), the difficulty of assembling the collecting body (430) and the heat exchange tube (410) is lowered, thereby reducing the difficulty of assembling the heat exchanger (400), and is advantageous for ensuring the assembly quality of the collecting body (430) and the heat exchange tube (410), and at the same time reducing the risk of leakage at the connection part of the collecting body (430) and the heat exchange tube (410), and facilitating the independent processing of the collecting body (430) and the connecting part (420). Accordingly, it is easy to form a heat exchange circuit (450) having at least one bent portion (451) within the heat exchange tube (410) using the collection body (430) and the connection portion (420), thereby improving the heat exchange effect of the heat exchange tube (410).

[0074] As can be seen from the structure described above, the battery device (100) of the present application is installed such that the heat exchanger (400) includes a connection part (420), and by assembling a collection body (430) to a heat exchange tube (410) using the connection part (420), the difficulty of assembling the collection body (430) and the heat exchange tube (410) is reduced, which is advantageous for reducing the difficulty of assembling the heat exchanger (400) and ensuring the quality of assembly of the collection body (430) and the heat exchange tube (410), and at the same time, the risk of leakage at the connection part of the collection body (430) and the heat exchange tube (410) is reduced, and at the same time, it is easy to form a heat exchange circuit (450) having at least one bent part (451) inside the heat exchange tube (410) using the collection body (430) and the connection part (420).

[0075] Here, by forming a heat exchange circuit (450) having at least one bend (451) within the heat exchange tube (410) in a limited manner, the heat exchange medium entering the heat exchange tube (410) is sequentially entered into at least two heat exchange passages (411), thereby enabling serial connection of at least two heat exchange passages (411). Accordingly, the residence time of the heat exchange medium within the heat exchange tube (410) and the coverage area for the battery cell assembly (120) are increased, and the temperature difference between the inlet and outlet of the heat exchange circuit (450) is prevented to some extent, thereby improving the heat exchange uniformity of the heat exchange tube (410), improving the phenomenon of non-uniform heat exchange of the battery cell assembly (120), and satisfying the uniform temperature demand of the battery cell assembly (120).

[0076] In other words, the battery device (100) of the present application is advantageous for reducing the difficulty of assembling the collector (430) and the heat exchanger (410), while also reducing the risk of leakage and improving the heat exchange effect of the heat exchanger (400).

[0077] It can be understood that, compared to the prior art, the battery device (100) of the present application can reduce the difficulty of assembling the fluid collector (430) and the heat exchange tube (410) and reduce the risk of leakage by installing a connection part (420) of the heat exchanger (400), and also facilitates the limited formation of a heat exchange circuit (450) having at least one bend part (451) within the heat exchange tube (410) by using the fluid collector (430) and the connection part (420), thereby improving the heat exchange effect of the heat exchanger (400) and ensuring the operational performance of the heat exchanger (400) to some extent.

[0078] In some embodiments, the collection body (430) is formed as an injection-molded member, thereby lowering the molding difficulty of the collection body (430) and improving the structural strength of the collection body (430), thereby ensuring the work performance of the collection body (430) to some extent.

[0079] In some embodiments, when combined with those shown in FIGS. 3 and FIG. 4, a through hole (434) is installed on the collector (430), and the through hole (434) is formed as a demolding hole, thereby lowering the injection molding difficulty of the collector (430).

[0080] In some embodiments, a plurality of heat exchange passages (411) all extend from one end to the other end in the longitudinal direction of the heat exchange tube (410), and a collection body (430) is installed at both ends in the longitudinal direction of the heat exchange tube (410), and the heat exchange medium is discharged through the collection body (430) after reciprocating several times within the heat exchange tube (410).

[0081] It should be explained that the heat exchanger (400) of the present application is used to control the temperature of a battery cell assembly (120) by accommodating a heat exchange medium, and when lowering the temperature of the battery cell assembly (120), the heat exchanger (400) can control the temperature of the battery cell assembly (120) by accommodating a cooling medium, and in this case, the heat exchanger (400) may be referred to as a cooling member, a cooling system, a cooling plate, a liquid cooling plate, etc.

[0082] Among them, the heat exchange medium mentioned here may be water, refrigerant, etc.

[0083] Additionally, the heat exchanger (400) may be used to heat the battery cell assembly (120), and embodiments of the present application are not limited thereto.

[0084] In some embodiments, a plurality of connection passages (421) and a plurality of heat exchange passages (411) are connected in a one-to-one correspondence, and a guide passage (435) is connected in a corresponding manner to at least two connection passages (421), so that at least two heat exchange passages (411) are connected through the guide passage (435) to form a heat exchange circuit (450) having at least one bend (451). By lowering the molding difficulty of the heat exchange circuit (450) having at least one bend (451), serial connection of at least two heat exchange passages (411) is implemented, so that the heat exchange medium entering the heat exchange tube (410) can sequentially enter the at least two heat exchange passages (411), thereby increasing the residence time of the heat exchange medium within the heat exchange tube (410) and the coverage area for the battery cell assembly (120), and preventing a large temperature difference between the inlet and outlet of the heat exchange circuit (450) to some extent, thereby improving the heat exchange uniformity of the heat exchange tube (410).

[0085] In some embodiments, combining those illustrated in FIGS. 3, 4, 6 and 7, a connecting portion (420) and a collecting body (430) are installed at both ends of a heat exchanger (410); each collecting body (430) includes a connecting passage (433) communicating with a collecting port (431), each guide passage (435) and the connecting passage (433) are independent of each other and are not communicating, and each guide passage (435) has two bypass holes (4351) installed at a distance; the connecting passage (433) of each collecting body (430) communicates with one of the heat exchange passages (411) through a connecting passage (421); Each guide passage (435) of each collection body (430) is connected to two of the heat exchange passages (411) through two bypass holes (4351), so that two of the heat exchange passages (411) are connected, and a bend (451) is formed between the heat exchange passage (411) and the guide passage (435). In this way, when the heat exchange medium is output to the collection port (431) of one of the collection bodies (430), it can be transported to the communication passage (433) through the collection port (431), and the communication passage (433) and the guide passage (435) are independent of each other and are not connected, and the communication passage (433) is connected to one of the heat exchange passages (411) through the connection passage (421), so the heat exchange medium transported to the communication passage (433) can flow into the heat exchange passage (411) along the extension direction of the communication passage (433) and can flow along the extension direction of the heat exchange passage (411), and at this time, the heat exchange medium can exchange heat with the battery cell assembly (120) to achieve the purpose of controlling the temperature of the battery cell assembly (120).

[0086] At the same time, since each guide passage (435) is connected to two of the heat exchange passages (411) through two bypass holes (4351), when the heat exchange medium entered into the heat exchange tube (410) flows into the heat exchange passage (411) connected to the bypass holes (4351), the heat exchange medium flows into the guide passage (435) through the bypass holes (4351), and then flows into the other heat exchange passage (411) connected to the bypass holes (4351) through the guide passage (435), thereby allowing the heat exchange medium entered into the heat exchange tube (410) to sequentially enter at least two heat exchange passages (411), thereby increasing the residence time of the heat exchange medium within the heat exchange tube (410) and the coverage area for the battery cell assembly (120), and preventing to some extent the large temperature difference between the inlet and outlet of the heat exchange circuit (450), the heat exchange of the heat exchange tube (410). Improves uniformity.

[0087] In some embodiments, the collection bodies (430) at both ends of the heat exchanger (410) are formed as a liquid inlet collection body and a liquid outlet collection body, respectively, and the liquid inlet collection body and the liquid outlet collection body each include a collection port (431), a communication passage (433) communicating with the collection port (431), and a guide passage (435) installed at a distance from the communication passage (433). A plurality of heat exchange passages (411) are provided within the heat exchanger (410), and a plurality of heat exchange passages (411) and a plurality of connection passages (421) are connected in a one-to-one correspondence. At least one heat exchange passage (411) is connected to the communication passage (433) of the liquid inlet collection body and the guide passage (435) of the liquid outlet collection body through a connection part (420), respectively, and at least one heat exchange passage (411) is connected to the guide passage (435) of the liquid inlet collection body and the liquid outlet collection body through the connection part (420). Each is connected to the guide passage (435) of the liquid collection body, and at least one heat exchange passage (411) is connected to the guide passage (435) of the liquid inflow collection body and the connecting passage (433) of the liquid outflow collection body through the connection part (420).

[0088] Through the installation described above, when a heat exchange medium enters the liquid inlet collecting body through the collecting port (431) of the liquid inlet collecting body, the heat exchange medium first flows along the extension direction of the connecting passage (433) to flow into the heat exchange passage (411) within the heat exchange tube (410), and at the same time, the heat exchange medium within the said heat exchange passage (411) can flow into the guide passage (435) of the liquid outlet collecting body, and can flow into another heat exchange passage (411) within the heat exchange tube (410) along the guide passage (435) of the liquid outlet collecting body, and the heat exchange medium within the said heat exchange passage (411) can flow into the guide passage (435) on the liquid inlet collecting body, and can flow into another part of the heat exchange passage (411) within the heat exchange tube (410) through the guide passage (435), and finally, sequentially the said heat exchange passage (411), the connecting passage (433) of the liquid outlet collecting body, and the liquid It is discharged through the collection port (431) of the discharge collection body.

[0089] The flow direction of the heat exchange medium described above causes the heat exchange medium to sequentially enter at least three heat exchange passages (411), thereby forming the heat exchange circuit (450) into an S-shaped circuit (as shown in FIG. 7), which increases the residence time of the heat exchange medium within the heat exchange tube (410) and the coverage area for the battery cell assembly (120), and prevents a large temperature difference between the inlet and outlet of the heat exchange circuit (450) to some extent, thereby improving the heat exchange uniformity of the heat exchange tube (410) and satisfying the uniform temperature requirements of the battery cell assembly (120).

[0090] In some embodiments, when combined with those shown in FIGS. 5, 6 and 7, a plurality of heat exchange passages (411) are installed within a heat exchange tube (410), and at least a portion of the heat exchange passages (411) is conductive and used to fill a heat exchange medium, while the inlet and outlet of another portion of the heat exchange passages (411) are sealed to prevent the entry of the heat exchange medium, thereby reducing the total content of the heat exchange medium within the heat exchange tube (410) and reducing the weight of the heat exchange medium within the heat exchange tube (410). The heat exchange passages (411) in which the heat exchange medium does not enter are hollow, so the weight of the heat exchange tube (410) itself can be effectively reduced, thereby achieving a reduction in the total weight of the heat exchanger (400), and the purpose of reducing the weight of the battery device (100) is achieved, which is advantageous for improving the weight energy density of the battery device (100).

[0091] At the same time, through the above-described installation, the capacity of the heat exchange medium within the heat exchanger (400) can be reduced without changing the contact area between the heat exchange tube (410) and the battery cell assembly (120), thereby improving the weight energy density of the battery device (100).

[0092] In some embodiments, combining those illustrated in FIGS. 3, FIGS. 4, FIGS. 6 and FIGS. 7, the heat exchanger (400) includes a sealing member (440), the sealing member (440) is installed in a collection body (430), and the sealing member (440) seals other structures excluding the communication passage (433) and bypass hole (4351) of the collection body (430), thereby achieving the purpose of sealing some heat exchange passages (411) and reducing the difficulty of sealing the heat exchange passages (411).

[0093] Of course, in some other embodiments, by combining what is shown in FIGS. 8 to 13, the sealing member (440) may be installed between the connection part (420) and the heat exchange tube (410), and the heat exchange passage (411) is directly sealed using the sealing member (440), thereby reducing the difficulty of sealing the heat exchange passage (411).

[0094] What needs to be explained is that when a sealing member (440) is installed on a collection body (430), the sealing member (440) is installed on both of the collection bodies (430) located at opposite ends of the heat exchange tube (410); and when a sealing member (440) is installed between a connection part (420) and a heat exchange tube (410), the sealing member (440) is installed on both of the opposite ends of the heat exchange tube (410), so that the heat exchange passage (411) can be effectively sealed using the sealing member (440), thereby preventing the heat exchange medium from entering the sealed heat exchange passage (411) and effectively reducing the weight of the heat exchanger (400).

[0095] Additionally, when the sealing member (440) is installed on the collection body (430), the sealing member (440) and the collection body (430) can be formed as an integral member, so that the fitting connection between the sealing member (440) and the collection body (430) can be omitted, thereby lowering the difficulty of assembling the sealing member (440) and improving the connection strength between the sealing member (440) and the collection body (430), so that the sealing member (440) can be stably installed on the collection body (430), thereby ensuring the working performance of the sealing member (440) to some extent; when the sealing member (440) is installed inside the heat exchanger tube (410), the collection body (430) can be processed and molded using an injection molding process, which is advantageous for lowering the difficulty of molding the collection body (430) and improving the structural stability of the collection body (430), and ensuring the working performance of the collection body (430) to some extent.

[0096] In some embodiments, the connection part (420) connects the sealing member (440) and the heat exchanger (410). In other words, when the connection part (420) is installed at one end of the heat exchanger (410), the connection part (420) simultaneously connects the sealing member (440) and the heat exchanger (410), thereby enabling simultaneous support of the connection part (420) using fittings of the sealing member (440) and the heat exchanger (410), improving the positional stability of the connection part (420) and ensuring the operational performance of the connection part (420) to some extent.

[0097] At the same time, when the connecting portion (420) is connected to the sealing member (440), the sealing member (440) can be supported using the connecting portion (420), thereby improving the positional stability of the sealing member (440) and improving the sealing effect of the sealing member (440).

[0098] In a specific example, when a sealing member (440) is installed between a connection part (420) and a heat exchange tube (410), during the assembly process of the heat exchange tube (410), the sealing member (440) is first installed within the heat exchange passage (411) (for example, by using an external driving member to push the sealing member (440) into the heat exchange passage (411)) to achieve a fitting connection between the sealing member (440) and the heat exchange passage (411); after the assembly of the sealing member (440) and the heat exchange passage (411) is completed, the connection part (420) is connected to the sealing member (440) and the heat exchange tube (410), respectively, to achieve a fixed connection between the connection part (420), the sealing member (440), and the heat exchange tube (410); When a sealing member (440) is installed on a collection body (430), during the assembly process of the heat exchanger (400), the sealing member (440) may first be installed on the collection body (430), and therein, the sealing member (440) and the collection body (430) may be welded, bonded, or integrally formed. After the assembly of the sealing member (440) and the collection body (430) is completed, a connection part (420) is connected to the sealing member (440) and the heat exchange tube (410), respectively, thereby realizing a fixed connection between the connection part (420), the sealing member (440), and the heat exchange tube (410).

[0099] In some embodiments, the connecting part (420) is an injection-molded member, and the collecting body (430) is fixedly connected to the connecting part (420). Here, by installing the connecting part (420) as an injection-molded member, the molding difficulty of the connecting part (420) can be lowered, while the structural strength of the connecting part (420) can be improved, thereby ensuring the operational performance of the connecting part (420) to some extent.

[0100] At the same time, by fixing the collection body (430) to the connection part (420), it is easy to fix the collection body (430) to the heat exchange tube (410) using the connection part (420), thereby lowering the difficulty of assembling the collection body (430) and the heat exchange tube (410), and lowering the difficulty of assembling the heat exchanger (400), and ensuring the quality of the connection between the collection body (430) and the heat exchange tube (410) to some extent.

[0101] In some embodiments, the connecting portion (420) and the collecting body (430) are connected by welding or adhesive. Here, it indicates that the connecting portion (420) and the collecting body (430) can form a fixed connection by welding or by adhesive. The above-described connection method can lower the difficulty of connecting the connecting portion (420) and the collecting body (430) while simultaneously improving the connection strength between the connecting portion (420) and the collecting body (430), thereby allowing the connecting portion (420) and the collecting body (430) to form a stable connection, and thus making it easy to fix the collecting body (430) to the heat exchanger (410) using the connecting portion (420).

[0102] Among them, the welding referred to here may be laser welding or infrared welding, etc.

[0103] Of course, in some other embodiments, the connecting part (420) and the collecting body (430) may be injection molded.

[0104] In some embodiments, the end of the connecting portion (420) may be directly fitted to the end of the collecting body (430) facing the connecting portion (420), and after fitting to the connecting portion, it may be connected again by welding or bonding, thereby enabling a fixed connection between the connecting portion (420) and the collecting body (430).

[0105] It needs to be explained that the connection part (420) and the collection body (430) form a fixed connection by welding or bonding, and compared to a locking connection, the sealing of the connection part between the connection part (420) and the collection body (430) can be improved, and furthermore, the installation of a sealing member between the connection part (420) and the collection body (430) can be prevented to some extent, thereby reducing the cost of the heat exchanger (400) and reducing the size of the heat exchanger (400), so that the size of the collection body (430) in the thickness direction becomes thinner, making it suitable for a thinner battery cell assembly (120).

[0106] In a specific example, by combining the configurations shown in FIGS. 6 and FIGS. 7, one end of the connecting part (420) is fitted into one end of the heat exchanger tube (410), and the other end of the connecting part (420) is fitted into one end of the collecting body (430) facing the connecting part (420), thereby realizing a fixed connection between the connecting part (420), the heat exchanger tube (410), and the collecting body (430), lowering the difficulty of connection, and improving the quality of connection.

[0107] In some embodiments, the collector (430) is a plastic member. In other words, the collector (430) is manufactured from a plastic material, which is advantageous for making the material of the collector (430) the same as the material of the connecting part (420), and furthermore, it facilitates the implementation of a fixed connection between the connecting part (420) and the collector (430), lowers the difficulty of connecting the connecting part (420) and the collector (430), and improves the quality of the connection.

[0108] At the same time, by installing the collection body (430) so that it is made of plastic material, the weight of the collection body (430) can be reduced and the manufacturing cost of the collection body (430) can be reduced.

[0109] In some embodiments, the heat exchanger (410) is a metal member, and the connecting part (420) is double injection molded onto the heat exchanger (410) to form an integral member with the heat exchanger (410). This indicates that, during the process of forming the heat exchanger (400), the heat exchanger (410) is first formed, and then the connecting part (420) and the heat exchanger (410) are integrally injection molded to achieve a fitting connection between the connecting part (420) and the heat exchanger (410). This lowers the difficulty of connecting the connecting part (420) and the heat exchanger (410), while also ensuring a certain degree of connection strength between the connecting part (420) and the heat exchanger (410), thereby allowing the connecting part (420) to be stably installed at one end of the heat exchanger (410), making it easy to fix-connect the collecting body (430) to the heat exchanger (410) using the connecting part (420).

[0110] In summary, the connecting part (420) is formed by double injection molding the heat exchanger tube (410) on one side so that the connecting part (420) and the heat exchanger tube (410) are formed as an integral member, and the connecting part (420) is fixedly connected to the collecting body (430) on the other side, thereby realizing a fitting connection between the collecting body (430) and the heat exchanger tube (410), thereby solving the technical problem in the prior art where the metal heat exchanger tube (410) and the injection-molded collecting body (430) could not realize an integral welding between multiple heterogeneous materials, and at the same time, the technical problem of the relatively high cost when connecting the metal heat exchanger tube (410) and the injection-molded collecting body (430) can also be solved.

[0111] At the same time, if the connection part (420) and the heat exchange tube (410) are injection molded as a single unit, compared to welding, bonding, or a connection, the sealing and pressure resistance of the connection part (420) and the heat exchange tube (410) can be improved, communication between the connection passage (421) and the heat exchange passage (411) can be realized, and the risk of leakage can be reduced.

[0112] In addition, by installing the heat exchange tube (410) as a metal member, it is advantageous to improve the structural strength of the heat exchange tube (410) and the heat exchange effect of the heat exchange tube (410), and to some extent ensure the operational performance of the heat exchange tube (410).

[0113] Among them, the metal member referred to here may be an iron member, a copper member, or an aluminum member, etc.

[0114] Of course, in some other embodiments, the heat exchanger (410) may be made of plastic.

[0115] In some embodiments, the connection part (420) is a plastic member. That is, the connection part (420) is manufactured from a plastic material so that, on one hand, the connection part (420) can be double injection molded into the heat exchanger tube (410) to form an integral member with the heat exchanger tube (410), thereby lowering the difficulty of connecting the connection part (420) and the heat exchanger tube (410); on the other hand, the weight of the connection part (420) can be reduced and the manufacturing cost of the connection part (420) can be reduced.

[0116] In some embodiments, a first region is installed on the outer surface of the heat exchanger (410), the roughness of the first region is greater than the roughness of the remaining region, and the first region is in contact with the connection portion (420). In this way, when the connection portion (420) is double injection molded onto the heat exchanger (410) to form an integral member with the heat exchanger (410), the connection strength between the heat exchanger (410) and the connection portion (420) is improved by increasing the bonding force between the heat exchanger (410) and the connection portion (420) using the first region, thereby enabling the connection portion (420) to be stably installed on the heat exchanger (410) and making it easy to fix-connect the collection body (430) to the heat exchanger (410) using the connection portion (420).

[0117] At the same time, by stably installing the connection part (420) on the heat exchange tube (410), the structural stability of the heat exchanger (400) can be improved, and the operational performance of the heat exchanger (400) can be guaranteed to some extent.

[0118] Among them, the first region mentioned here can be understood as the region of the heat exchanger (410) near the end, and between the two end regions, the heat exchanger (410) is further provided with a second region, and the second region can be understood as the remaining region of the heat exchanger (410). By installing the roughness of the first region larger than the roughness of the remaining region, when the first region comes into contact with the connection part (420), the bonding force between the heat exchanger (410) and the connection part (420) is increased, thereby enabling the improvement of the connection strength between the heat exchanger (410) and the connection part (420).

[0119] In some embodiments, the heat exchanger (410) is made of a metal material and a first region of the heat exchanger (410) is roughened to increase the roughness of the first region, thereby enabling the roughness of the first region to be greater than the roughness of the remaining region.

[0120] Among them, the roughness of the first region is not specifically limited here, and a larger roughness value is better.

[0121] Of course, in some other embodiments, a plurality of protrusions and / or a plurality of concave grooves may be installed within the first region, and by increasing the roughness of the first region, the roughness of the first region may be installed to be greater than the roughness of other regions, thereby increasing the bonding force between the heat exchanger (410) and the connection part (420).

[0122] In some embodiments, a sealing member (440) is installed between a connection part (420) and a heat exchange tube (410), and the connection part (420) covers the sealing member (440) and the heat exchange tube (410) through double injection molding so that the connection part (420), the sealing member (440), and the heat exchange tube (410) are formed as an integral member. What can be understood here is that when a sealing member (440) is installed between a connection part (420) and a heat exchange tube (410), during the assembly process of the heat exchanger (400), the sealing member (440) and the heat exchange tube (410) are first processed and molded to be connected in place, and then the connection part (420), the heat exchange tube (410), and the sealing member (440) are injection molded as a single unit, thereby double injection molding the connection part (420) to cover the sealing member (440) and the heat exchange tube (410), thereby realizing a fitting connection between the connection part (420), the heat exchange tube (410), and the sealing member (440), and while lowering the difficulty of connecting the connection part (420), the heat exchange tube (410), and the sealing member (440), the connection strength of the connection part (420), the heat exchange tube (410), and the sealing member (440) can be guaranteed to some extent, so that the connection part (420) By allowing it to be stably installed at one end of the heat exchanger tube (410), it is easy to implement fitting communication between the connection passage (421) and the heat exchange passage (411), and it is advantageous to implement fitting connection between the heat exchanger tube (410) and the collection body (430) using the connection part (420), thereby lowering the difficulty of fitting connection between the heat exchanger tube (410) and the collection body (430) and ensuring the working performance of the heat exchanger (400) to some extent.

[0123] In some embodiments, combining those illustrated in FIGS. 4, 8 and 9, the connecting portion (420) comprises an outer collar (422) and a connecting plate (423), the outer collar (422) is fitted to one end of the heat exchanger tube (410), the connecting plate (423) is installed within the outer collar (422), a plurality of connecting passages (421) penetrate the connecting plate (423), and the outer collar (422) and / or the connecting plate (423) are double injection molded into the heat exchanger tube (410). Here, when the connecting portion (420) is double injection molded into the heat exchanger tube (410), the outer collar (422) can be double injection molded into the heat exchanger tube (410); or, the connecting plate (423) can be double injection molded into the heat exchanger tube (410). Alternatively, the outer collar (422) and the connection plate (423) can both be double injection molded into the heat exchanger (410), thereby implementing an injection molded fitting between the connection part (420) and the heat exchanger (410), which lowers the difficulty of connecting the connection part (420) and the heat exchanger (410) and improves the sealing and pressure resistance of the connection part between the connection part (420) and the heat exchanger (410).

[0124] In some embodiments, the outer collar (422) is fitted to one end of the heat exchanger (410) and injection-molded to the heat exchanger (410), and the connecting plate (423) is double-injection-molded to the sealing member (440), thereby enabling injection-molded fitting of the connecting part (420), the heat exchanger (410), and the sealing member (440), while also reducing the difficulty of injection-molding the connecting part (420), the heat exchanger (410), and the sealing member (440).

[0125] In a specific example, the outer collar (422) is fitted into the first area and, while implementing the installation of the connection part (420) at one end of the heat exchange tube (410), the difficulty of connecting the connection part (420) and the heat exchange tube (410) can be lowered and the connection strength between the connection part (420) and the heat exchange tube (410) can be improved.

[0126] In some other embodiments, the side wall of the heat exchange passage (411) that does not need to be filled with a cooling medium inside the heat exchange tube (410) may be roughened, and when the connection part (420) is injection molded, the connection part (420) comes into contact with the side wall of the heat exchange passage (411) that does not need to be filled with a cooling medium inside the heat exchange tube (410), thereby enabling an injection molded fitting between the connection part (420) and the heat exchange tube (410) and improving the fitting strength.

[0127] In other words, it is not limited to inserting the outer collar (422) into the heat exchange tube (410).

[0128] In a specific example, combining the features shown in FIGS. 4, 8, and 9, the connection portion (420) has a thin wall to form an outer collar (422), the outer collar (422) is connected to one end of the heat exchange tube (410), the area where the heat exchange medium is to flow is installed as a through hole to form a connection passage (421), and all other areas form a connection plate (423) as a solid.

[0129] In some embodiments, combining what is shown in FIGS. 9, 10 and 11, the sealing member (440) is sealed within the heat exchange passage (411), and a portion of the sealing member (440) extends out of the heat exchange passage (411), so that at least a portion of the sealing member (440) protrudes from the heat exchange passage (411). This indicates that when the sealing member (440) is installed within the heat exchange tube (410) to seal the heat exchange passage (411), a portion of the sealing member (440) extends out of the heat exchange passage (411), which facilitates the assembly and disassembly of the sealing member (440) on one hand, and is advantageous for securing the sealing member (440) using the connection portion (420) on the other, further improves the positional stability of the sealing member (440), and ensures the operational performance of the sealing member (440) to some extent.

[0130] In some embodiments, a receiving groove for receiving a sealing member (440) is provided within the connecting plate (423). By doing so, a portion of the sealing member (440) extending out of the heat exchange passage (411) can be assembled within the receiving groove of the connecting plate (423), thereby enabling the sealing member (440) to be secured using the connecting plate (423). That is, the sealing member (440) can be secured using the connecting portion (420), thereby improving the positional stability of the sealing member (440) and ensuring the operational performance of the sealing member (440) to some extent.

[0131] In summary, the connection portion (420) of the present application is designed such that the receiving groove avoids the sealing member (440), so that when the connection portion (420) is double injection molded into the heat exchanger (410), the connection portion (420) can be simultaneously connected to the heat exchanger (410) and the sealing member (440), thereby improving the positional stability of the sealing member (440) and realizing partial sealing of the heat exchanger (410).

[0132] In a specific example, during the assembly process of the heat exchanger (400), a sealing member (440) is first installed in the heat exchanger tube (410) (for example, by using an external driving member to push the sealing member (440) into the heat exchange passage (411)), and then the sealing member (440) and the heat exchanger tube (410) are inserted and integrally injection molded with the connection part (420), and the connection part (420) is covered with the sealing member (440) and the heat exchanger tube (410) through double injection molding, thereby realizing a fitting connection between the connection part (420), the sealing member (440), and the heat exchanger tube (410), so that a part of the heat exchange passage (411) of the heat exchanger tube (410) is sealed using the sealing member (440).

[0133] In some embodiments, by combining what is shown in FIG. 12 and FIG. 13, the sealing member (440) is formed as a sealing block, the sealing block is shaped to form a heat exchange passage (411) to be sealed, and the sealing block is inserted into the end of the heat exchange passage (411) so that the sealing member (440) is installed inside the heat exchange tube (410) to seal at least one heat exchange passage (411), and the difficulty of assembling the sealing member (440) is reduced.

[0134] Here, the sealing block and the heat exchange passage (411) can be improved by using a press fit to increase the connection strength between the sealing block and the heat exchange passage (411), thereby allowing the sealing block to be stably installed within the heat exchange passage (411), which can improve the sealing effect of the sealing member (440).

[0135] It needs to be explained that the block referred to here could be a metal block or a plastic block.

[0136] In some embodiments, the contact length between the sealing block and the heat exchange passage (411) in the longitudinal direction of the heat exchange passage (411) is 10 mm or more, thereby further increasing the connection strength between the sealing block and the heat exchange passage (411) so that the sealing block can be stably installed within the heat exchange passage (411), thereby improving the sealing effect of the sealing member (440).

[0137] It needs to be explained that when multiple heat exchange passages (411) need to be sealed, multiple adjacent heat exchange passages (411) can be sealed, and accordingly, it is easy to seal multiple heat exchange passages (411) simultaneously using a single sealing member (440), thereby reducing the difficulty of sealing multiple heat exchange passages (411).

[0138] Of course, multiple sealing members (440) may be installed, and the multiple sealing members (440) may correspond to each of the multiple heat exchange passages (411) to be sealed, thereby enabling sealing of the heat exchange passages (411) using the sealing members (440); at the same time, some of the heat exchange passages (411) may be sealed using a single sealing member (440).

[0139] Additionally, when multiple sealing members (440) are installed, adjacent sealing members (440) may be independent of each other or may be fitted connected.

[0140] In some embodiments, when combined with those shown in FIGS. 5, 8, and 9, a plurality of separation ribs (412) are installed within the heat exchanger (410) to separate a plurality of heat exchange passages (411). This indicates that a plurality of separation ribs (412) are installed within the heat exchanger (410), and the plurality of separation ribs (412) are used to separate a plurality of heat exchange passages (411) within the heat exchanger (410) to reduce the difficulty of forming the plurality of heat exchange passages (411). At the same time, the plurality of separation ribs (412) may be fitted to support the heat exchanger (410), which is advantageous for improving the structural strength and structural stability of the heat exchanger (410), ensuring the operational performance of the heat exchanger (410) to some extent, and facilitating the extension of the service life of the heat exchanger (410).

[0141] Optionally, by combining the features shown in FIGS. 8 and 9, at least one insertion groove (441) is provided in the sealing member (440), and at least one separation rib (412) is inserted into the insertion groove (441) so that the sealing member (440) is positioned within the heat exchange tube (410) and seals the heat exchange passage (411). In this way, the sealing member (440) is installed within the heat exchange tube (410) to seal at least one heat exchange passage (411), while simultaneously lowering the difficulty of fitting the sealing member (440) and the heat exchange tube (410) and improving the fitting quality, thereby allowing the sealing member (440) to be stably installed within the heat exchange passage (411), and thus improving the sealing effect of the sealing member (440).

[0142] In some embodiments, combining those illustrated in FIGS. 8 and 9, a position limiting projection block (442) is installed on the side wall of the sealing member (440), and the position limiting projection block (442) contacts the cross section of the separation rib (412) and / or the heat exchanger (410), suitable for limiting the length of the portion of the sealing member (440) located within the heat exchanger passage (411). This is such that the position limiting projection block (442) contacts the cross section of the separation rib (412); or, the position limiting projection block (442) contacts the cross section of the heat exchanger (410); Alternatively, the position limiting projection block (442) simultaneously contacts the separation rib (412) and the cross-section of the heat exchange tube (410) to limit the length of the portion where the sealing member (440) is located within the heat exchange passage (411), which prevents the sealing member (440) from failing to seal the end opening of the heat exchange passage (411) to some extent, that is, prevents some heat exchange medium from filling the end opening of the heat exchange passage (411) to some extent, thereby improving the sealing effect of the sealing member (440) and is advantageous for reducing the weight of the heat exchanger (400).

[0143] In some embodiments, the position limiting projection block (442) contacts the connection plate (423) to implement a contact fitting between the sealing member (440) and the connection part (420), which facilitates supporting the sealing member (440) using the connection part (420), improves the positional stability of the sealing member (440), and ensures the sealing effect of the sealing member (440) to some extent.

[0144] In some embodiments, as shown in FIG. 3, the height of the collection port (431) of the collection body (430) located at both ends of the heat exchanger (410) is the same. Therefore, the connection between the collection port (431) at both ends of the heat exchanger (410) and the external element is easy and the difficulty of connection is reduced, so it is easy to transport the heat exchange medium toward the heat exchanger (410) using the collection port (431) or to output the heat exchange medium inside the heat exchanger (410) through the collection port (431), thereby allowing the heat exchange medium to flow effectively within the heat exchanger (410) and ensuring the heat exchange effect of the heat exchanger (410) to some extent.

[0145] In some embodiments, when the heat exchanger (400) is applied to a battery device (100), a surface perpendicular to the thickness direction of the heat exchanger tube (410) is used to contact the battery cell assembly (120), thereby facilitating heat exchange between the heat exchanger (400) and the battery cell assembly (120).

[0146] At the same time, the heat exchanger (410) also provides stable support, restraint, and deformation prevention effects for the battery cell assembly (120).

[0147] In some embodiments, the battery device (100) comprises a plurality of battery cell assemblies (120) and a plurality of heat exchangers (400), wherein the plurality of battery cell assemblies (120) are arranged in a plurality of rows, and the battery cell assemblies (120) of each row are installed between two adjacent heat exchangers (400). In this way, it is possible to perform heat exchange on the battery cell assemblies (120) using two heat exchangers (400) simultaneously, thereby ensuring the heat exchange effect of the heat exchangers (400) to some extent, so that the temperature of the battery cell assemblies (120) can be maintained within an appropriate temperature range, thereby extending the service life of the battery cell assemblies (120) and improving the safety of use of the battery cell assemblies (120).

[0148] Optionally, both sides of the battery cell assembly (120) may be in contact with two adjacent heat exchangers (400), so that both sides of the battery cell assembly (120) can perform heat exchange, thereby further enhancing the heat exchange effect of the battery cell assembly (120), and at the same time, a plurality of battery cell assemblies (120) and a plurality of heat exchangers (400) may be in contact with each other and supported, thereby improving the positional stability of the plurality of battery cell assemblies (120) and a plurality of heat exchangers (400), further ensuring the structural stability of the battery device (100) to some extent, and improving the operational performance of the battery device (100).

[0149] In some embodiments, the battery device (100) also includes a connecting pipe (not shown in the drawing), and since the connecting pipe is used to connect adjacent heat exchangers (400), it is possible to transport a heat exchange medium toward a plurality of heat exchangers (400) at the same time, thereby reducing the difficulty of circulation of the heat exchange medium within the plurality of heat exchangers (400).

[0150] Here, the structural form of the connector is not limited, and it may be a single tube or may be made by joining multiple tubes together.

[0151] Hereinafter, an electric device (1000) of an embodiment of the present application is described with reference to the drawings in the specification.

[0152] Combining what is shown in FIG. 1 and FIG. 2, an electric device (1000) according to an embodiment of the present application includes a battery device (100) of the above-described embodiment, and the battery device (100) is used to provide electric energy.

[0153] Since the battery device (100) of the embodiment of the present application has the technical effects described above, the electric device (1000) of the embodiment of the present application also has the technical effects described above; that is, by using the battery device (100) of the present application, the operating performance of the electric device (1000) can be guaranteed to some extent, the safety of use of the electric device (1000) can be improved, and the lifespan of the electric device (1000) can be extended.

[0154] As can be understood, other configurations and operations of the battery device (100) and electric device (1000) according to the embodiments of the present application are known to those skilled in the art and are therefore not described in further detail herein.

[0155] It should be explained that the embodiments and features of the embodiments of the present application can be combined with one another insofar as there is no conflict.

[0156] The foregoing are merely preferred embodiments of this application and are not intended to limit it; those skilled in the art may make various modifications and changes to this application. All modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application shall be included within the scope of protection of this application. Explanation of the symbols

[0157] 1000: Electrical device; 100: Battery unit; 110: Case; 113: Part 1; 114: Part 2; 120: Battery cell assembly; 200: Controller; 300: Motor; 400: Heat exchanger; 410: Heat exchange tube; 411: Heat exchange passage; 412: Separating rib; 420: Connection part; 421: Connection passage; 422: External collar; 423: Connection plate; 430: Collection type; 431: Collection port; 433: Chimney passage; 434: Through-hole; 435: Guide Passage; 4351: Detour Hall; 450: Heat exchange circuit; 451: Bending section; 440: Sealing member; 441: Insertion groove; 442: Position limiting projection block.

Claims

Claim 1 A battery device comprising: a case (110); a battery cell assembly (120) installed within the case (110); and a heat exchanger (400) installed within the case (110) and configured to perform heat exchange with the battery cell assembly (120); wherein the heat exchanger (400) comprises: a heat exchange tube (410) having a plurality of heat exchange passages (411); a connection part (420) fitted at one end of the heat exchange tube (410) and having a plurality of connection passages (421) installed therein; and a collection body (430) fixed to the connection part (420) and having a collection port (431) and at least one guide passage (435) installed therein. A battery device comprising, wherein the collecting port (431) is in communication with at least one heat exchange passage (411), and at least two heat exchange passages (411) are in communication through the guide passage (435) and the connecting passage (421) to form a heat exchange circuit (450) having at least one bend (451). Claim 2 A battery device according to claim 1, wherein a plurality of the above-mentioned connection passages (421) and a plurality of the above-mentioned heat exchange passages (411) are connected in a one-to-one correspondence, and the guide passage (435) is connected in a corresponding manner to at least two of the above-mentioned connection passages (421), so that at least two of the above-mentioned heat exchange passages (411) are connected through the guide passage (435) to form a heat exchange circuit (450) having at least one of the above-mentioned bending portions (451). Claim 3 In paragraph 2, the connecting part (420) and the collecting body (430) are installed at both ends of the heat exchange tube (410); Each of the above-mentioned collection bodies (430) includes a communication passage (433) that communicates with the collection port (431), and the guide passage (435) and the communication passage (433) are independent of each other and are not in communication with each other, and each of the above-mentioned guide passages (435) has two bypass holes (4351) installed at a distance from each other; the communication passage (433) of each of the above-mentioned collection bodies (430) communicates with one of the above-mentioned heat exchange passages (411) through the connection passage (421); each of the above-mentioned guide passages (435) of each of the above-mentioned collection bodies (430) communicates with two of the above-mentioned heat exchange passages (411) through two of the above-mentioned bypass holes (4351) so that two of the above-mentioned heat exchange passages (411) are in communication, and the above-mentioned bending part (451) is formed between the above-mentioned heat exchange passage (411) and the above-mentioned guide passage (435), battery device. Claim 4 A battery device according to any one of claims 1 to 3, wherein the connecting part (420) is an injection-molded member and the collecting body (430) is fixedly connected to the connecting part (420). Claim 5 A battery device according to claim 4, wherein the heat exchanger (410) is a metal member, and the connecting part (420) is double injection molded into the heat exchanger (410) to form an integral member with the heat exchanger (410). Claim 6 In paragraph 5, the above connection part (420) is a plastic member, a battery device. Claim 7 A battery device according to any one of claims 5 to 6, wherein a first region is installed on the outer surface of the heat exchange tube (410), the roughness of the first region is greater than the roughness of the remaining region, and the first region is in contact with the connection part (420). Claim 8 A battery device according to any one of claims 4 to 7, wherein the connection portion (420) comprises an outer collar (422) and a connection plate (423), the outer collar (422) is fitted into one end of the heat exchange tube (410), the connection plate (423) is installed within the outer collar (422), the plurality of connection passages (421) penetrate the connection plate (423), and the outer collar (422) and / or the connection plate (423) are double injection molded into the heat exchange tube (410). Claim 9 A battery device in which, in any one of paragraphs 4 to 8, the connecting part (420) and the collecting body (430) are connected by welding or adhesive. Claim 10 In claim 9, the above-mentioned collection body (430) is a plastic member, a battery device. Claim 11 A battery device in which, in any one of claims 1 to 10, the height of the collection port (431) of the collection body (430) located at both ends of the heat exchanger (410) is the same. Claim 12 A battery device according to any one of claims 1 to 11, wherein the battery device comprises a plurality of battery cell assemblies (120) and a plurality of heat exchangers (400), wherein the plurality of battery cell assemblies (120) are arranged in a plurality of rows, and the battery cell assemblies (120) of each row are installed between two adjacent heat exchangers (400). Claim 13 An electric device comprising a battery device described in any one of claims 1 to 12, wherein the battery device is used to provide electrical energy.

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