Battery device and electric equipment

Abstract

The utility model relates to the technical field of battery heat exchange, and particularly discloses a battery device and electric equipment.The battery device comprises a box body, a battery monomer assembly and a heat exchanger, the battery monomer assembly and the heat exchanger are arranged in the box body and conduct heat exchange, the heat exchanger comprises a heat exchange pipe, a switching part and a current collector, and the heat exchange pipe comprises a plurality of heat exchange channels; one end of the heat exchange tube is sleeved with the switching part, the switching part is provided with a plurality of switching channels, the current collector is fixed to the switching part and provided with a current collecting opening and at least one flow guide channel, the current collecting opening is communicated with the at least one heat exchange channel, and the at least two heat exchange channels are communicated through the flow guide channels and the switching channels to define a heat exchange loop with at least one turning part. The assembly difficulty of the current collector and the heat exchange tube is reduced, the assembly quality is improved, the heat exchange effect of the heat exchanger is improved, the uniform temperature requirement of the battery monomer assembly is met, the risk of thermal runaway of the battery device is further reduced, the use safety of the battery device is improved, and the service life of the battery device is prolonged.

Description

[0001] Cross-reference to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202410501046.5, filed on April 24, 2024, and No. 202420869133.1, filed on April 24, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery heat exchange technology, and in particular to a battery device and electrical equipment. Background Technology

[0004] As a rechargeable power source, batteries are increasingly widely used in daily life and industry. When batteries are applied to new energy vehicles, they are mainly used to provide power as the power source for these vehicles.

[0005] In order to maintain the battery device's temperature within a suitable range during use, a heat exchanger is usually installed inside the battery device. However, existing heat exchangers are difficult to assemble, have poor assembly quality, and poor heat exchange effect, which affects the safety of the battery device and electrical equipment. Summary of the Invention

[0006] This application aims to at least solve one of the technical problems existing in the prior art. To this end, the first aspect of this application is to provide a battery device that, while reducing the difficulty of heat exchanger assembly and improving assembly quality, also improves the heat exchanger's heat exchange effect, thus solving the technical problems of difficult heat exchanger assembly, poor assembly quality, and poor heat exchange effect in the prior art.

[0007] The second aspect of this application is to provide an electrical device having the aforementioned battery device.

[0008] In a first aspect, embodiments of this application provide a battery device, comprising: a housing; a battery cell assembly disposed within the housing; and a heat exchanger disposed within the housing, configured to exchange heat with the battery cell assembly; wherein the heat exchanger comprises: a heat exchange tube, the heat exchange tube including a plurality of heat exchange channels; a connecting portion, the connecting portion being sleeved on one end of the heat exchange tube, the connecting portion having a plurality of connecting channels; and a current collector, the current collector being fixed to the connecting portion, the current collector having a collection port and at least one guiding channel, the collection port communicating with at least one of the heat exchange channels, and at least two of the heat exchange channels communicating through the guiding channel and the connecting channel to define a heat exchange loop having at least one bend.

[0009] In the technical solution of this application embodiment, by setting a heat exchanger and including a transition part, it is convenient to assemble the current collector to the heat exchange tube using the transition part, thereby reducing the assembly difficulty of the current collector and the heat exchange tube, thus reducing the assembly difficulty of the heat exchanger, improving the assembly quality of the current collector and the heat exchange tube, reducing the risk of leakage at the connection between the current collector and the heat exchange tube, and facilitating the separate processing of the current collector and the transition part. This allows the current collector and the transition part to define a heat exchange loop with at least one bend within the heat exchanger, improving the heat exchange effect of the heat exchanger, meeting the temperature uniformity requirements of the battery device, thereby reducing the risk of thermal runaway of the battery device, improving the safety of the battery device and extending the service life of the battery device. In other words, the battery device of this application, while reducing the assembly difficulty of the current collector and the heat exchange tube of the heat exchanger and improving the assembly quality, can also improve the heat exchange effect of the heat exchanger.

[0010] In some embodiments, a plurality of the transfer channels and a plurality of the heat exchange channels are connected in a one-to-one correspondence, and a flow guide channel is connected to at least two of the transfer channels, so that at least two of the heat exchange channels are connected through the flow guide channel to define a heat exchange loop having at least one of the bends. This reduces the molding difficulty of the heat exchange loop with the bend, thereby realizing at least two heat exchange channels in series, allowing the heat exchange medium entering the heat exchange tube to enter at least two heat exchange channels sequentially, increasing the residence time of the heat exchange medium in the heat exchange tube and the coverage area of ​​the battery cell assembly, and to a certain extent avoiding large temperature differences between the inlet and outlet of the heat exchange loop, improving the heat exchange uniformity of the heat exchange tube, and meeting the temperature uniformity requirements of the battery cell assembly.

[0011] In some embodiments, both ends of the heat exchange tube are provided with the transition portion and the current collector; each current collector includes a connecting channel communicating with the current collection port, each flow guide channel is independent and not connected to the connecting channel, and each flow guide channel is provided with two spaced-apart flow holes; the connecting channel of each current collector is connected to one of the heat exchange channels through the transition channel; each flow guide channel of each current collector is connected to two of the heat exchange channels through the two flow holes, so that the two heat exchange channels are connected, and the bend is formed between the heat exchange channel and the flow guide channel. In this way, when the heat exchange medium is output to the collection port of one of the current collectors, it can be transported to the connecting channel through the collection port. Since the connecting channel and the guiding channel are set at intervals and the connecting channel is connected to one of the heat exchange channels through the transfer channel, the heat exchange medium transported to the connecting channel can flow into the heat exchange channel along the extension direction of the connecting channel, and then flow into the guiding channel of another current collector. This allows the heat exchange medium entering the heat exchange tube to enter at least two heat exchange channels in sequence, increasing the residence time of the heat exchange medium in the heat exchange tube and the coverage area of ​​the battery cell module, and to a certain extent avoiding large temperature differences between the inlet and outlet of the heat exchange circuit, thus meeting the temperature uniformity requirements of the battery cell module.

[0012] In some embodiments, the adapter is an injection-molded part, and the current collector is fixedly connected to the adapter. This reduces the molding difficulty of the adapter, thereby enabling the current collector to be fixedly connected to the heat exchange tube using the adapter. This reduces the assembly difficulty of the current collector and the heat exchange tube, improves the connection quality between the current collector and the heat exchange tube, avoids leakage, and enhances the heat exchange efficiency of the heat exchanger.

[0013] In some embodiments, the heat exchange tube is a metal component, and the adapter is injection molded onto the heat exchange tube and formed as a single piece. This achieves a mating connection between the adapter and the heat exchange tube, reducing the difficulty of connecting them while ensuring the connection strength to a certain extent. It also increases the sealing performance and pressure resistance at the connection point, allowing the adapter to be stably positioned at one end of the heat exchange tube, thus facilitating the fixed connection of the collector to the heat exchange tube using the adapter.

[0014] In some embodiments, the adapter is a plastic part. This allows the adapter to be injection molded onto the heat exchange tube and formed as a single piece, reducing the difficulty of connecting the adapter to the heat exchanger; it also reduces the weight of the adapter and lowers its manufacturing cost.

[0015] In some embodiments, the outer surface of the heat exchange tube is provided with a first region, the roughness of the first region being greater than the roughness of the other regions, and the first region is in contact with the transition portion. This is to increase the bonding force between the heat exchange tube and the transition portion by utilizing the first region, thereby increasing the connection strength between the heat exchange tube and the transition portion, so that the transition portion can be stably disposed on the heat exchange tube, facilitating the stable connection of the current collector to the heat exchange tube using the transition portion.

[0016] In some embodiments, the adapter includes an outer ring and an adapter plate. The outer ring is fitted over one end of the heat exchange tube, and the adapter plate is disposed inside the outer ring. The plurality of adapter channels pass through the adapter plate, and the outer ring and / or the adapter plate are secondary injection molded onto the heat exchange tube. This allows for secondary injection molding of the adapter onto the heat exchange tube, reducing the difficulty of connecting the adapter to the heat exchange tube and increasing the sealing performance and pressure resistance at the connection point.

[0017] In some embodiments, the adapter and the current collector are welded or glued together. This reduces the difficulty of connecting the adapter and the current collector while also increasing the connection strength, allowing them to form a stable connection. This facilitates the use of the adapter to fix the current collector to the heat exchange tube and improves the sealing performance at the connection between the adapter and the current collector, eliminating the need for a seal.

[0018] In some embodiments, the current collector is a plastic component. This reduces the weight and manufacturing cost of the current collector, and also helps to simplify the connection between the current collector and the adapter.

[0019] In some embodiments, the height of the collector ports at both ends of the heat exchange tube is the same. This facilitates the connection of the collector ports at both ends of the heat exchange tube to external components, reduces connection difficulty, and makes it easier to use the collector ports to deliver the heat exchange medium toward the heat exchange tube, or to output the heat exchange medium inside the heat exchange tube through the collector ports. This allows the heat exchange medium to flow effectively inside the heat exchange tube, ensuring the heat exchange effect of the heat exchange tube to a certain extent.

[0020] In some embodiments, the battery device includes a plurality of battery cell assemblies and a plurality of heat exchangers, wherein the plurality of battery cell assemblies are arranged in multiple rows, and each row of battery cell assemblies is disposed between two adjacent heat exchangers.

[0021] Secondly, this application provides an electrical device including the aforementioned battery device, which is used to provide electrical energy.

[0022] In the technical solution of this application embodiment, by adopting the battery device described in the above embodiment, the working performance of the electrical equipment can be guaranteed to a certain extent, the safety of the electrical equipment can be improved, and the service life of the electrical equipment can be extended.

[0023] Additional aspects and advantages of this application will become apparent from the description which follows, or may be learned by practice of this application. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of an electrical device according to some embodiments of this application.

[0026] Figure 2 This is an exploded view of a battery device according to some embodiments of this application.

[0027] Figure 3 This is an exploded view of a heat exchanger according to some embodiments of this application.

[0028] Figure 4 for Figure 3 A magnified view of a portion of the heat exchanger.

[0029] Figure 5 for Figure 3 A schematic diagram of part of the structure of the heat exchanger.

[0030] Figure 6 This is a top view of a heat exchanger according to some embodiments of this application.

[0031] Figure 7 for Figure 6 A cross-sectional view along line AA.

[0032] Figure 8 This is an exploded view of a heat exchanger according to other embodiments of this application.

[0033] Figure 9 for Figure 8 An enlarged view of region I in the image.

[0034] Figure 10 This is a top view of a heat exchanger according to other embodiments of this application.

[0035] Figure 11 for Figure 10 A sectional view along line BB.

[0036] Figure 12 for Figure 10 An exploded view of part of the structure of the heat exchanger.

[0037] Figure 13 for Figure 12 A cross-sectional view along the CC line.

[0038] Figure label:

[0039] 1000. Electrical equipment;

[0040] 100. Battery device;

[0041] 110. Box body; 113. First part; 114. Second part;

[0042] 120. Battery cell assembly;

[0043] 200. Controller;

[0044] 300. Motor;

[0045] 400. Heat exchanger;

[0046] 410. Heat exchange tube; 411. Heat exchange channel; 412. Partition rib;

[0047] 420. Adapter section; 421. Adapter channel; 422. Outer ring; 423. Adapter plate;

[0048] 430. Current collector;

[0049] 431. Collection port; 433. Connecting channel; 434. Through hole;

[0050] 435. Flow guiding channel; 4351. Flow bypass hole;

[0051] 450. Heat exchange circuit; 451. Bend;

[0052] 440. Sealing component; 441. Insertion groove; 442. Limiting protrusion. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0054] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms "comprising" and "having," and any variations thereof, in the description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0055] In this application, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0058] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0059] In this application, "multiple" means two or more (including two).

[0060] Currently, judging from market trends, the application of battery devices is becoming increasingly widespread. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace, among other fields.

[0061] As the application fields of battery devices continue to expand, the market demand for them is also constantly increasing.

[0062] When the battery device is working, a large amount of heat is generated due to the discharge of the positive and negative electrodes of the battery cells and the chemical reaction of the electrolyte inside the battery cells, which causes the temperature of the battery cells to rise.

[0063] In the prior art, in order to reduce the temperature of individual battery cells, heat exchangers are usually installed in the battery device. The heat exchangers exchange heat with the individual battery cells to maintain the temperature of the individual battery cells within a suitable temperature range. This, to a certain extent, ensures the working performance of the individual battery cells, extends their service life, and improves their safety.

[0064] The heat exchanger generally includes an inlet liquid collector, an outlet liquid collector, and a heat exchange tube disposed between the inlet liquid collector and the outlet liquid collector. The heat exchange medium is introduced into the heat exchange tube through the inlet liquid collector. The heat exchange medium circulates in the heat exchange tube and is discharged from the outlet liquid collector. The heat exchange medium is a fluid, which can be a cooling medium or a heating medium. The fluid can circulate in the heat exchange tube to achieve heat exchange with the battery cells, thereby achieving the purpose of regulating the temperature of the battery device.

[0065] However, the applicant has discovered that the existing heat exchange tubes use a parallel connection to transport the heat exchange medium through multiple heat exchange channels, resulting in a large temperature difference between the two ends of the heat exchange medium, which in turn leads to uneven heating of the battery cells and affects the heat exchange effect.

[0066] Furthermore, the chamfered edges of the heat exchange tubes make welding them to the inlet and outlet manifolds difficult. Direct welding also increases the risk of leakage. If the heat exchange tubes are injection molded as a single unit with the inlet and outlet manifolds, the internal flow requirements of the inlet and outlet manifolds make demolding difficult, affecting the molding quality and efficiency of the heat exchanger.

[0067] To solve the above problems, combined with Figures 1-13As shown in the figure, this application embodiment provides a battery device 100. The heat exchanger 400 within the battery device 100 reduces the assembly difficulty of the current collector 430 and the heat exchange tube 410 while also improving the heat exchange efficiency of the heat exchange tube 410. Specifically, the heat exchanger 400 is configured to include a heat exchange tube 410, a connecting part 420, and a current collector 430. The connecting part 420 is sleeved over one end of the heat exchange tube 410, and the current collector 430 is fixed to the connecting part 420. This allows the current collector 430 and the heat exchange tube 410 to be connected through the connecting part 420, thereby reducing the assembly difficulty of the current collector 430 and the heat exchange tube 410, achieving the purpose of reducing the assembly difficulty of the heat exchanger 400. Furthermore, the above connection method can also improve the heat exchange efficiency of the current collector 430 and the heat exchange tube 410. The improved fit of the tube 410 reduces the risk of leakage at the connection between the current collector 430 and the heat exchange tube 410. Simultaneously, connecting the current collector 430 to the heat exchange tube 410 via the adapter 420 allows the current collector 430 to be molded independently. This facilitates configuring the current collector 430 with a collection port 431 and at least one flow channel 435, enabling the current collector 430 and the adapter 420 to define a heat exchange loop 450 with at least one bend 451 within the heat exchange tube 410. This improves the heat exchange effect of the heat exchanger 400, meets the temperature uniformity requirements of the battery cell assembly 120, thereby reducing the risk of thermal runaway in the battery device 100, improving the safety of the battery device 100, and extending the service life of the battery device 100.

[0068] This application embodiment also provides an electrical device 1000 that uses the battery device 100 of this application as a power source. The electrical device 1000 can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc.

[0069] Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys; spacecraft can include airplanes, rockets, space shuttles, and spacecraft; power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0070] For ease of explanation, the following embodiments use a vehicle as an example to describe the structure of the electrical equipment 1000 and the battery device 100 of this application.

[0071] Please refer to Figure 1The electrical equipment 1000 is a vehicle, which can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. The vehicle is equipped with a battery device 100, which can be located at the bottom, front, or rear of the vehicle. The battery device 100 can be used to power the vehicle; for example, it can serve as the vehicle's operating power source.

[0072] like Figure 1 As shown, the vehicle may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, for the power needs of the vehicle during starting, navigation and driving.

[0073] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle, but also as the driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0074] The battery device 100 according to an embodiment of this application is described below with reference to the accompanying drawings.

[0075] Combination Figure 2 and Figure 3 As shown, the battery device 100 includes a housing 110, a battery cell assembly 120, and a heat exchanger 400.

[0076] Among them, such as Figure 2 As shown, the battery cell assembly 120 is housed within the housing 110. This allows the housing 110 to support and protect the battery cell assembly 120, improving its structural stability, extending its service life, and enhancing its safety during use.

[0077] In some embodiments, such as Figure 2 As shown, the housing 110 may include a first part 113 and a second part 114, which overlap each other. The first part 113 and the second part 114 together define a receiving cavity for accommodating the battery cell assembly 120 and the heat exchanger 400, thereby reducing the molding difficulty of the housing 110.

[0078] In this design, the first part 113 can be a hollow structure open at one end, and the second part 114 can be a plate-like structure. The second part 114 covers the open side of the first part 113 (not shown in the example figure), so that the first part 113 and the second part 114 together define a receiving cavity; or, the second part 114 can be a hollow structure open at one end, and the first part 113 can be a plate-like structure (not shown in the example figure), with the first part 113 covering the open side of the second part 114, so that the first part 113 and the second part 114 can also cooperate to define a receiving cavity; or, as... Figure 2 As shown, both the first part 113 and the second part 114 are hollow structures with one side open. The open side of the first part 113 covers the open side of the second part 114 to define the receiving cavity. The box 110 formed by the first part 113 and the second part 114 can be of various shapes, such as cylinder, cube or cuboid.

[0079] Of course, in some other embodiments of this application, the battery device 100 may not include the housing 110, but only the battery cell assembly 120 and the heat exchange tube 410, which will not be elaborated here.

[0080] The battery device 100 mentioned in the embodiments of this application refers to a single physical module comprising multiple battery cells to provide higher voltage and capacity. For example, the battery device 100 mentioned in this application can be a battery cell assembly 120 or multiple battery cells. The battery cell assembly 120 generally includes multiple battery cells. The battery device 100 generally includes a housing 110 for encapsulating the multiple battery cell assembly 120 or multiple battery cells, and the housing 110 can, to a certain extent, prevent liquids or other foreign objects from affecting the charging or discharging of the battery cells.

[0081] It should also be noted that in the battery device 100, multiple battery cell modules 120 can be connected in series, in parallel or in a mixed manner. Mixed connection means that multiple battery cell modules 120 are connected in both series and parallel. Multiple battery cell modules 120 can be directly connected in series, in parallel or in a mixed manner, and then the whole composed of multiple battery cell modules 120 is housed in the housing 110.

[0082] In some embodiments, such as Figure 2 As shown, the battery device 100 includes multiple sets of battery cell assemblies 120. During the assembly process of the battery device 100, the battery device 100 can also be formed by multiple battery cells first connected in series, in parallel or in a mixed manner to form battery cell assemblies 120. The multiple battery cell assemblies 120 are then connected in series, in parallel or in a mixed manner to form a whole and housed in the housing 110.

[0083] In some embodiments, the battery device 100 may also include other structures, such as electrical connectors for enabling electrical connections between multiple battery cell assemblies 120.

[0084] The electrical connectors mentioned here can be understood as busbars.

[0085] also, Figure 2 The image shows a battery cell formed as a cuboid. In other embodiments of this application, the battery cell may also be cylindrical, polygonal, flat, or other shapes.

[0086] In this application, the battery cell may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, etc., and the embodiments of this application are not limited to these. The battery cell may be cylindrical, flat, cuboid, or other shapes, etc., and the embodiments of this application are not limited to these. Battery cells are generally divided into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and the embodiments of this application are not limited to these.

[0087] For example, a single battery cell typically includes a housing, a cell assembly, and an electrolyte. The housing is used to house the cell assembly and the electrolyte, and the housing has at least one positive electrode post and at least one negative electrode post. The cell assembly includes one or more electrode assemblies, which are formed by stacking or winding positive electrode sheets, negative electrode sheets, and separators.

[0088] The positive electrode typically includes a positive current collector and a positive active material layer. The positive active material layer is directly or indirectly coated on the positive current collector. Multiple positive electrode tabs are stacked together and electrically connected to the positive electrode post. For example, the stacked positive electrode tabs can be directly soldered to the positive electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a positive electrode adapter plate. The stacked positive electrode tabs are soldered to one end of the positive electrode adapter plate, and the other end of the positive electrode adapter plate is soldered to the positive electrode post, thereby forming an electrical connection between the positive electrode tabs and the positive electrode post.

[0089] The negative electrode generally includes a negative current collector and a negative active material layer. The negative active material layer is directly or indirectly coated on the negative current collector, and multiple negative electrode tabs are stacked together and electrically connected to the negative electrode post. For example, the stacked negative electrode tabs can be directly soldered to the negative electrode post to form an electrical connection; alternatively, the battery cell assembly may also include a negative electrode adapter piece, with the stacked negative electrode tabs soldered to one end of the adapter piece, and the other end of the adapter piece soldered to the negative electrode post, thus forming an electrical connection between the negative electrode tabs and the negative electrode post. The material of the separator is not limited; for example, it can be polypropylene or polyethylene.

[0090] The heat exchanger 400 is installed inside the housing 110. The heat exchanger 400 is configured to exchange heat with the battery cell assembly 120 so that the temperature of the battery cell assembly 120 can be adjusted by using the heat exchange tube 410, so that the temperature of the battery cell assembly 120 can be maintained within a suitable temperature range. This not only extends the service life of the battery cell assembly 120, but also improves the safety of the battery cell assembly 120.

[0091] It should be noted that the heat exchanger 400 disclosed in this application embodiment can exchange heat with the battery cell assembly 120 for cooling or heating the battery cell assembly 120. In other words, the heat exchanger 400 can cool down the battery cell assembly 120 or heat up the battery cell assembly 120 that is working in a low-temperature environment, so that the temperature of the battery cell assembly 120 reaches the working range temperature for normal power supply.

[0092] Among them, combined Figures 3-13 As shown, the heat exchanger 400 in this embodiment includes: a heat exchange tube 410, a transition section 420, and a collector 430.

[0093] Combination Figure 5 , Figure 6 and Figure 7 As shown, the heat exchange tube 410 includes multiple heat exchange channels 411. The heat exchange channels 411 are mainly filled with heat exchange medium to facilitate heat exchange between the heat exchange tube 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 of the battery cell assembly 120, and ensuring the working performance of the battery cell assembly 120 to a certain extent.

[0094] In some embodiments, such as Figure 3 and Figure 8 As shown, the heat exchange tube 410 can be a flat tube, and the cross-section of the heat exchange channel 411 can be a conventional shape such as a circle, rectangle, or ellipse, or other irregular shapes.

[0095] Combination Figure 3 , Figure 5 and Figure 6 As shown, the adapter 420 is fitted over one end of the heat exchange tube 410, and the adapter 420 is provided with multiple adapter channels 421.

[0096] It should be noted that, compared to fitting the end of the adapter 420 onto one end of the heat exchange tube 410, attaching the adapter 420 over one end of the heat exchange tube 410 reduces the difficulty of assembling the adapter 420 and the heat exchange tube 410, while also increasing the contact area between the adapter 420 and the heat exchange tube 410. This helps to improve the connection strength between the adapter 420 and the heat exchange tube 410, and makes the relative position of the adapter 420 and the heat exchange tube 410 stable.

[0097] In some embodiments, multiple transition channels 421 are respectively provided corresponding to multiple heat exchange channels 411. In this way, when the transition part 420 is sleeved on one end of the heat exchange tube 410, the heat exchange medium can be easily transported into the heat exchange channel 411 by using multiple transition channels 421, so as to ensure the working performance of the heat exchange tube 410 to a certain extent.

[0098] Combination Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the collector 430 is fixed to the transition part 420. The collector 430 is provided with a collection port 431 and at least one guide channel 435. The collection port 431 is connected to at least one heat exchange channel 411. At least two heat exchange channels 411 are connected through the guide channel 435 and the transition channel 421 to define a heat exchange circuit 450 having at least one bend 451.

[0099] The specific flow direction of the heat exchange medium in heat exchange circuit 450 can be found in [reference needed]. Figure 7 and Figure 11 The direction of the extended dashed line shown in the diagram.

[0100] It should be noted that by configuring the manifold 431 to communicate with at least one heat exchange channel 411, the heat exchange medium is conveyed into the heat exchange channel 411, that is, the heat exchange medium is conveyed into the heat exchange tube 410. By connecting at least two heat exchange channels 411 through the guide channel 435 and the transfer channel 421 to define a heat exchange circuit 450 with at least one bend 451, the heat exchange medium entering the heat exchange tube 410 can sequentially enter at least two heat exchange channels 411, realizing at least two heat exchange channels. The series connection of heat exchange tubes 411 increases the residence time of the heat exchange medium in the heat exchange tubes 410 and the coverage area of ​​the battery cell assembly 120. It also avoids large temperature differences between the inlet and outlet of the heat exchange circuit 450 to a certain extent, thereby improving the heat exchange uniformity of the heat exchange tubes 410, improving the uneven heat exchange of the battery cell assembly 120, meeting the temperature uniformity requirements of the battery cell assembly 120, and thus reducing the risk of thermal runaway of the battery device 100, improving the safety of the battery device 100 and extending the service life of the battery device 100.

[0101] In some embodiments, the manifold 431 is connected to at least one transfer channel 421. Since the transfer channel 421 is connected to the heat exchange channel 411, the manifold 431 is connected to at least one heat exchange channel 411, thereby reducing the difficulty of connecting the manifold 431 and the heat exchange channel 411.

[0102] It is worth noting that the heat exchanger 400 of this application is provided with a transition part 420, which is sleeved on one end of the heat exchange tube 410 and fixes the collector 430 to the transition part 420. This allows the collector 430 to be fixedly connected to the heat exchange tube 410 using the transition part 420. Compared with directly fixing the collector 430 to the heat exchange tube 410, this reduces the assembly difficulty of the collector 430 and the heat exchange tube 410, thereby reducing the assembly difficulty of the heat exchanger 400 and helping to ensure the assembly quality of the collector 430 and the heat exchange tube 410. It also reduces the risk of leakage at the connection between the collector 430 and the heat exchange tube 410. At the same time, it is convenient to process the collector 430 and the transition part 420 separately, so as to use the collector 430 and the transition part 420 to define a heat exchange loop 450 with at least one bend 451 in the heat exchange tube 410, thereby improving the heat exchange effect of the heat exchange tube 410.

[0103] As can be seen from the above structure, the battery device 100 of this application, by providing a heat exchanger 400 and configuring the heat exchanger 400 to include a connecting part 420, and using the connecting part 420 to assemble the current collector 430 to the heat exchange tube 410, reduces the assembly difficulty of the current collector 430 and the heat exchange tube 410, thereby reducing the assembly difficulty of the heat exchanger 400, and helps to ensure the assembly quality of the current collector 430 and the heat exchange tube 410, reducing the risk of leakage at the connection between the current collector 430 and the heat exchange tube 410. At the same time, it is also convenient to use the current collector 430 and the connecting part 420 to define a heat exchange circuit 450 with at least one bend 451 in the heat exchange tube 410.

[0104] By defining a heat exchange loop 450 with at least one bend 451 within the heat exchange tube 410, the heat exchange medium entering the heat exchange tube 410 can sequentially enter at least two heat exchange channels 411, achieving series connection of at least two heat exchange channels 411. This increases the residence time of the heat exchange medium within the heat exchange tube 410 and the coverage area of ​​the battery cell assembly 120, and to a certain extent avoids large temperature differences between the inlet and outlet of the heat exchange loop 450. This improves the uniformity of heat exchange in the heat exchange tube 410, mitigates the uneven heat exchange phenomenon in the battery cell assembly 120, and meets the temperature uniformity requirements of the battery cell assembly 120.

[0105] In other words, the battery device 100 of this application reduces the difficulty of assembling the current collector 430 and the heat exchange tube 410, while also reducing the risk of leakage and improving the heat exchange effect of the heat exchanger 400.

[0106] It is understandable that, compared with the prior art, the battery device 100 of this application, by setting the adapter 420 of the heat exchanger 400, reduces the assembly difficulty of the current collector 430 and the heat exchange tube 410, and also reduces the risk of leakage. At the same time, it is also convenient to use the current collector 430 and the adapter 420 to define a heat exchange circuit 450 with at least one bend 451 in the heat exchange tube 410, thereby improving the heat exchange effect of the heat exchanger 400 and ensuring the working performance of the heat exchanger 400 to a certain extent.

[0107] In some embodiments, the current collector 430 is formed as an injection molded part to reduce the molding difficulty of the current collector 430 and improve the structural strength of the current collector 430, so as to ensure the working performance of the current collector 430 to a certain extent.

[0108] In some embodiments, combined with Figure 3 and Figure 4 As shown, the current collector 430 is provided with a through hole 434, which is formed as a draft hole to reduce the injection molding difficulty of the current collector 430.

[0109] In some embodiments, a plurality of heat exchange channels 411 extend from one end to the other end of the heat exchange tube 410 along its length, and a collector 430 is disposed at both ends of the heat exchange tube 410 along its length. The heat exchange medium circulates repeatedly within the heat exchange tube 410 before being discharged through the collector 430.

[0110] It should be noted that the heat exchanger 400 of this application is used to contain the heat exchange medium to regulate the temperature of the battery cell assembly 120. When cooling the battery cell assembly 120, the heat exchanger 400 can contain the cooling medium to regulate the temperature of the battery cell assembly 120. In this case, the heat exchanger 400 can also be referred to as a cooling component, cooling system, cooling plate, liquid cooling plate, etc.

[0111] The heat exchange medium mentioned here can be water, refrigerant, etc.

[0112] In addition, the heat exchanger 400 can also be used to heat the battery cell assembly 120, but this application embodiment is not limited to this.

[0113] In some embodiments, a plurality of transition channels 421 and a plurality of heat exchange channels 411 are connected in a one-to-one correspondence, and a flow guide channel 435 is connected in a corresponding manner to at least two transition channels 421, so that at least two heat exchange channels 411 are connected through the flow guide channel 435 to define a heat exchange circuit 450 having at least one bend 451. This reduces the molding difficulty of the heat exchange circuit 450 having at least one bend 451, thereby enabling at least two heat exchange channels 411 to be connected in series, so that the heat exchange medium entering the heat exchange tube 410 can sequentially enter at least two heat exchange channels 411, increasing the residence time of the heat exchange medium in the heat exchange tube 410 and the coverage area of ​​the battery cell assembly 120, and to a certain extent avoiding large temperature differences between the inlet and outlet of the heat exchange circuit 450, thereby improving the heat exchange uniformity of the heat exchange tube 410.

[0114] In some embodiments, combined with Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, both ends of the heat exchange tube 410 are provided with a transition section 420 and a collector 430; each collector 430 includes a connecting channel 433 connected to the collection port 431, each guide channel 435 is independent and not connected to the connecting channel 433, and each guide channel 435 is provided with two spaced-apart flow holes 4351; the connecting channel 433 of each collector 430 is connected to one of the heat exchange channels 411 through the transition channel 421; each guide channel 435 of each collector 430 is connected to two of the heat exchange channels 411 through the two flow holes 4351, so that the two heat exchange channels 411 are connected, and a bend 451 is formed between the heat exchange channel 411 and the guide channel 435. When the heat exchange medium is output to the collection port 431 of one of the current collectors 430, it can be transported to the connecting channel 433 through the collection port 431. Since the connecting channel 433 and the guiding channel 435 are independent and not connected, and the connecting channel 433 is connected to one of the heat exchange channels 411 through the transfer channel 421, the heat exchange medium transported to the connecting channel 433 can flow into the heat exchange channel 411 along the extension direction of the connecting channel 433 and flow along the extension direction of the heat exchange channel 411. At this time, the heat exchange medium can exchange heat with the battery cell assembly 120 to achieve the purpose of regulating the temperature of the battery cell assembly 120.

[0115] Meanwhile, since each flow channel 435 is connected to two heat exchange channels 411 through two flow-around holes 4351, when the heat exchange medium flowing into the heat exchange tube 410 flows into the heat exchange channel 411 connected to the flow-around hole 4351, the heat exchange medium can flow through the flow-around hole 4351 into the flow channel 435, and then flow through the flow channel 435 into another heat exchange channel 411 connected to the flow-around hole 4351. This allows the heat exchange medium entering the heat exchange tube 410 to enter at least two heat exchange channels 411 in sequence, increasing the residence time of the heat exchange medium in the heat exchange tube 410 and the coverage area of ​​the battery cell assembly 120, and to a certain extent avoiding large temperature differences between the inlet and outlet of the heat exchange circuit 450, thereby improving the heat exchange uniformity of the heat exchange tube 410.

[0116] In some embodiments, the collectors 430 at both ends of the heat exchange tube 410 are respectively formed as an inlet collector and an outlet collector. Both the inlet collector and the outlet collector include a collection port 431, a connecting channel 433 communicating with the collection port 431, and a guide channel 435 spaced apart from the connecting channel 433. The heat exchange tube 410 has a plurality of heat exchange channels 411. The plurality of heat exchange channels 411 and the plurality of transition channels 421 are connected one-to-one. At least one heat exchange channel 411 is connected to the connecting channel 433 on the inlet collector and the guide channel 435 on the outlet collector through a transition part 420. At least one heat exchange channel 411 is connected to the guide channel 435 on the inlet collector and the guide channel 435 on the outlet collector through a transition part 420. At least one heat exchange channel 411 is connected to the guide channel 435 on the inlet collector and the connecting channel 433 on the outlet collector through a transition part 420.

[0117] With the above configuration, when the heat exchange medium enters the liquid inlet collector through the inlet port 431, the heat exchange medium first flows along the extension direction of the connecting channel 433 and flows into the heat exchange channel 411 in the heat exchange tube 410. At the same time, the heat exchange medium in the heat exchange channel 411 can flow to the guide channel 435 on the liquid outlet collector, and flow along the guide channel 435 on the liquid outlet collector to other heat exchange channels 411 in the heat exchange tube 410. The heat exchange medium in the heat exchange channel 411 can also flow to the guide channel 435 on the liquid inlet collector, and flow through the guide channel 435 to some other heat exchange channels 411 in the heat exchange tube 410. Finally, it flows out sequentially through the heat exchange channel 411, the connecting channel 433 on the liquid outlet collector, and the inlet port 431 on the liquid outlet collector.

[0118] The flow direction of the heat exchange medium ensures that it enters at least three heat exchange channels 411 sequentially, thereby forming an S-shaped circuit 450 (e.g., Figure 7As shown, this increases the residence time of the heat exchange medium in the heat exchange tube 410 and the coverage area of ​​the battery cell module 120, and to a certain extent avoids a large temperature difference between the inlet and outlet of the heat exchange circuit 450, thereby improving the heat exchange uniformity of the heat exchange tube 410 and meeting the temperature uniformity requirements of the battery cell module 120.

[0119] In some embodiments, combined with Figure 5 , Figure 6 and Figure 7 As shown, the heat exchange tube 410 is provided with multiple heat exchange channels 411. At least some of the heat exchange channels 411 are open and used to fill the heat exchange medium. The inlet and outlet of the other part of the heat exchange channels 411 are blocked to prevent the heat exchange medium from entering, thereby reducing the total content of the heat exchange medium in the heat exchange tube 410 and thus reducing the weight of the heat exchange medium in the heat exchange tube 410. In addition, the heat exchange channels 411 in the heat exchange tube 410 that are not filled with heat exchange medium are hollow structures, which can effectively reduce the weight of the heat exchange tube 410 itself. Therefore, the overall weight of the heat exchanger 400 is reduced, thereby achieving the purpose of reducing the weight of the battery device 100, which is conducive to improving the weight capacity density of the battery device 100.

[0120] Meanwhile, the above-mentioned arrangement can reduce the heat exchange medium capacity in the heat exchanger 400 without changing the contact area between the heat exchange tube 410 and the battery cell assembly 120, thereby increasing the weight capacity density of the battery device 100.

[0121] In some embodiments, combined with Figure 3 , Figure 4 , Figure 6 and Figure 7 As shown, the heat exchanger 400 includes a sealing element 440, which is disposed on the collector 430. The sealing element 440 is used to seal other structures on the collector 430 except for the connecting channel 433 and the flow-around hole 4351, so as to achieve the purpose of sealing part of the heat exchange channel 411 and reduce the difficulty of sealing the heat exchange channel 411.

[0122] Of course, in other embodiments, combined with Figures 8-13 As shown, the sealing element 440 can also be provided between the transition part 420 and the heat exchange tube 410, and the heat exchange channel 411 can be directly sealed by the sealing element 440, reducing the difficulty of sealing the heat exchange channel 411.

[0123] It should be noted that when the sealing element 440 is provided on the collector 430, the sealing element 440 is provided on both ends of the collector 430 of the heat exchange tube 410; when the sealing element 440 is provided between the transition part 420 and the heat exchange tube 410, the sealing element 440 is provided on both ends of the heat exchange tube 410, so that the sealing element 440 can effectively block the heat exchange channel 411, prevent the heat exchange medium from entering the blocked heat exchange channel 411, and effectively reduce the weight of the heat exchanger 400.

[0124] Furthermore, when the sealing component 440 is located in the heat exchange tube 430, the sealing component 440 and the heat exchange tube 430 can be formed as a single piece, eliminating the need for a mating connection between the sealing component 440 and the heat exchange tube 430, reducing the assembly difficulty of the sealing component 440, and increasing the connection strength between the sealing component 440 and the heat exchange tube 430, so that the sealing component 440 can be stably located on the heat exchange tube 430, thereby ensuring the working performance of the sealing component 440 to a certain extent. When the sealing component 440 is located inside the heat exchange tube 410, the heat exchange tube 430 can be processed by injection molding, reducing the molding difficulty of the heat exchange tube 430 and improving the structural stability of the heat exchange tube 430, thereby ensuring the working performance of the heat exchange tube 430 to a certain extent.

[0125] In some embodiments, the adapter 420 connects the sealing member 440 and the heat exchange tube 410. That is, when the adapter 420 is located at one end of the heat exchange tube 410, the adapter 420 simultaneously connects the sealing member 440 and the heat exchange tube 410, so that the adapter 420 can be supported by the cooperation of the sealing member 440 and the heat exchange tube 410, thereby improving the positional stability of the adapter 420 and ensuring the working performance of the adapter 420 to a certain extent.

[0126] At the same time, by connecting the adapter 420 to the sealing member 440, the adapter 420 can also be used to support the sealing member 440, thereby improving the positional stability of the sealing member 440 and enhancing its sealing effect.

[0127] In a specific example, when the sealing element 440 is located between the transition part 420 and the heat exchange tube 410, during the assembly of the heat exchange tube 410, the sealing element 440 can first be placed inside the heat exchange channel 411 (e.g., by using an external driving component to push the sealing element 440 into the heat exchange channel 411) to achieve a mating connection between the sealing element 440 and the heat exchange channel 411. After the sealing element 440 and the heat exchange channel 411 are assembled, the transition part 420 is then connected to both the sealing element 440 and the heat exchange tube 410 to achieve the transition. The adapter 420 is fixedly connected to the plugging component 440 and the heat exchange tube 410. When the plugging component 440 is placed on the collector 430, during the assembly of the heat exchanger 400, the plugging component 440 can be placed on the collector 430 first. The plugging component 440 and the collector 430 can be welded, bonded or integrally formed. After the plugging component 440 and the collector 430 are assembled, the adapter 420 is connected to the plugging component 440 and the heat exchange tube 410 respectively to achieve a fixed connection between the adapter 420 and the plugging component 440 and the heat exchange tube 410.

[0128] In some embodiments, the adapter 420 is an injection molded part, and the current collector 430 is fixedly connected to the adapter 420. By making the adapter 420 an injection molded part, the molding difficulty of the adapter 420 is reduced, and the structural strength of the adapter 420 is improved, so as to ensure the working performance of the adapter 420 to a certain extent.

[0129] Meanwhile, by fixing the collector 430 to the adapter 420, the collector 430 can be fixedly connected to the heat exchange tube 410 using the adapter 420, thereby reducing the assembly difficulty of the collector 430 and the heat exchange tube 410, thus reducing the assembly difficulty of the heat exchanger 400, and ensuring the connection quality of the collector 430 and the heat exchange tube 410 to a certain extent.

[0130] In some embodiments, the adapter 420 and the current collector 430 are welded or glued together. This means that the adapter 420 and the current collector 430 can be fixedly connected by welding or by gluing. These connection methods reduce the difficulty of connecting the adapter 420 and the current collector 430 while also increasing the connection strength, resulting in a stable connection between them. This facilitates the use of the adapter 420 to fix the current collector 430 to the heat exchange tube 410.

[0131] The welding mentioned here can be laser welding or infrared welding, etc.

[0132] Of course, in some other embodiments, the adapter 420 and the current collector 430 may also be injection molded.

[0133] In some embodiments, the end of the adapter 420 may also be directly mated with the end of the current collector 430 facing the adapter 420, and then connected by welding or bonding after mating, so as to achieve a fixed connection between the adapter 420 and the current collector 430.

[0134] It should be noted that by welding or bonding the adapter 420 and the current collector 430 to form a fixed connection, compared with snap-fit, the sealing performance at the connection between the adapter 420 and the current collector 430 can be improved. This can, to some extent, avoid the need to set a seal between the adapter 420 and the current collector 430, reduce the cost of the heat exchanger 400, and reduce the size of the heat exchanger 400, making the current collector 430 thinner in the thickness direction, which is suitable for thinner battery cell assembly 120.

[0135] In specific examples, combined Figure 6 and Figure 7As shown, one end of the adapter 420 is sleeved on one end of the heat exchange tube 410, and the other end of the adapter 420 is sleeved on the end of the collector 430 facing the adapter 420, so as to realize the fixed connection between the adapter 420, the heat exchange tube 410, and the collector 430, and reduce the connection difficulty and improve the connection quality.

[0136] In some embodiments, the current collector 430 is a plastic part. That is, the current collector 430 is made of plastic material, which makes it easier to make the material of the current collector 430 the same as that of the adapter part 420, thereby facilitating the fixed connection between the adapter part 420 and the current collector 430, reducing the difficulty of connecting the adapter part 420 and the current collector 430, and improving the connection quality.

[0137] At the same time, by making the current collector 430 a plastic material, the weight of the current collector 430 can be reduced and the manufacturing cost of the current collector 430 can be lowered.

[0138] In some embodiments, the heat exchange tube 410 is a metal part, and the adapter 420 is injection molded onto the heat exchange tube 410 and formed as an integral part with the heat exchange tube 410. This means that during the processing of the heat exchanger 400, the heat exchange tube 410 is first processed and formed, and then the adapter 420 is integrally injection molded with the heat exchange tube 410 to achieve a mating connection between the adapter 420 and the heat exchange tube 410. This reduces the difficulty of connecting the adapter 420 and the heat exchange tube 410, and also ensures the connection strength between the adapter 420 and the heat exchange tube 410 to a certain extent, so that the adapter 420 can be stably set at one end of the heat exchange tube 410, thereby facilitating the use of the adapter 420 to fix the current collector 430 to the heat exchange tube 410.

[0139] In summary, the adapter 420 performs secondary injection molding of the heat exchange tube 410, making the adapter 420 and the heat exchange tube 410 a single unit. On the other hand, the adapter 420 is fixedly connected to the current collector 430, thereby achieving a mating connection between the current collector 430 and the heat exchange tube 410. This solves the technical problem in the prior art that multiple dissimilar materials cannot be integrated for welding of the metal heat exchange tube 410 and the injection-molded current collector 430. It also solves the technical problem of high cost when connecting the metal heat exchange tube 410 and the injection-molded current collector 430.

[0140] Meanwhile, by integrally injection molding the adapter 420 and the heat exchange tube 410, compared with welding, bonding or snap-fitting, the sealing performance and pressure resistance of the connection between the adapter 420 and the heat exchange tube 410 can be increased, and the connection between the adapter channel 421 and the heat exchange channel 411 can be realized, reducing the risk of leakage.

[0141] In addition, by making the heat exchange tube 410 a metal part, it is also beneficial to improve the structural strength of the heat exchange tube 410 and enhance the heat exchange effect of the heat exchange tube 410, thus ensuring the working performance of the heat exchange tube 410 to a certain extent.

[0142] The metal parts mentioned here can be iron, copper, or aluminum, etc.

[0143] Of course, in some other embodiments, the heat exchange tube 410 may also be made of plastic.

[0144] In some embodiments, the adapter 420 is a plastic part. That is, the adapter 420 is made of plastic material, which on the one hand allows the adapter 420 to be injection molded onto the heat exchange tube 410 and formed into a single piece with the heat exchange tube 410, reducing the difficulty of connecting the adapter 420 and the heat exchange tube 410; on the other hand, it can also reduce the weight of the adapter 420 and reduce the manufacturing cost of the adapter 420.

[0145] In some embodiments, the outer surface of the heat exchange tube 410 is provided with a first region, the roughness of which is greater than that of the other regions, and the first region is in contact with the adapter 420. Thus, when the adapter 420 is injection molded onto the heat exchange tube 410 and formed as a single piece with the heat exchange tube 410, the first region can be used to increase the bonding force between the heat exchange tube 410 and the adapter 420, thereby increasing the connection strength between the heat exchange tube 410 and the adapter 420. This allows the adapter 420 to be stably mounted on the heat exchange tube 410, facilitating the use of the adapter 420 to fix the current collector 430 to the heat exchange tube 410.

[0146] Meanwhile, by stably mounting the adapter 420 on the heat exchange tube 410, the structural stability of the heat exchanger 400 can be improved, which in turn ensures the working performance of the heat exchanger 400 to a certain extent.

[0147] The first region mentioned here can be understood as the region near the end of the heat exchange tube 410. Between the two end regions, the heat exchange tube 410 also has a second region, which can be understood as the remaining regions of the heat exchange tube 410. By setting the roughness of the first region to be greater than that of the remaining regions, when the first region comes into contact with the transition part 420, the bonding force between the heat exchange tube 410 and the transition part 420 can be increased, thereby increasing the connection strength between the heat exchange tube 410 and the transition part 420.

[0148] In some embodiments, the heat exchange tube 410 is made of a metallic material, and the first region of the heat exchange tube 410 is roughened to increase the roughness of the first region, thereby setting the roughness of the first region to be greater than that of the remaining regions.

[0149] Here, the roughness value of the first region is not specifically limited; the larger the roughness value, the better.

[0150] Of course, in some other embodiments, multiple protrusions and / or multiple grooves may be provided in the first region. The combination of multiple protrusions and / or multiple grooves can also increase the roughness of the first region, thereby setting the roughness of the first region to be greater than that of the other regions, and increasing the bonding force between the heat exchange tube 410 and the adapter 420.

[0151] In some embodiments, the sealing member 440 is disposed between the transition portion 420 and the heat exchange tube 410. The transition portion 420 is then injection molded to cover the sealing member 440 and the heat exchange tube 410, so that the transition portion 420, the sealing member 440, and the heat exchange tube 410 form an integral part. This can be understood as follows: when the sealing member 440 is disposed between the transition portion 420 and the heat exchange tube 410, during the assembly of the heat exchanger 400, the sealing member 440 and the heat exchange tube 410 can be first processed and connected in place. Then, the transition portion 420, the heat exchange tube 410, and the sealing member 440 are integrally injection molded, thereby achieving a secondary injection molding of the transition portion 420 to cover the sealing member 440 and the heat exchange tube 410, achieving a mating connection between the transition portion 420, the heat exchange tube 410, and the sealing member 440, and reducing the height of the transition portion 420 and the heat exchange tube 410. While reducing the connection difficulty of the sealing component 440, it can also ensure the connection strength between the adapter 420 and the heat exchange tube 410 and the sealing component 440 to a certain extent, so that the adapter 420 can be stably set at one end of the heat exchange tube 410, thereby facilitating the connection between the adapter channel 421 and the heat exchange channel 411. It is also beneficial to use the adapter 420 to realize the connection between the heat exchange tube 410 and the collector 430, reducing the difficulty of the connection between the heat exchange tube 410 and the collector 430, and ensuring the working performance of the heat exchanger 400 to a certain extent.

[0152] In some embodiments, combined with Figure 4 , Figure 8 and Figure 9 As shown, the adapter 420 includes an outer ring 422 and an adapter plate 423. The outer ring 422 is fitted over one end of the heat exchange tube 410, and the adapter plate 423 is disposed inside the outer ring 422. Multiple adapter channels 421 pass through the adapter plate 423. The outer ring 422 and / or the adapter plate 423 are then injection molded onto the heat exchange tube 410. This means that when the adapter 420 is secondarily injection molded onto the heat exchange tube 410, the outer ring 422 can be secondarily injection molded onto the heat exchange tube 410; or, the adapter plate 423 can be secondarily injection molded onto the heat exchange tube 410; or, both the outer ring 422 and the adapter plate 423 can be secondarily injection molded onto the heat exchange tube 410, to achieve injection molding fit between the adapter 420 and the heat exchange tube 410, thereby reducing the connection difficulty between the adapter 420 and the heat exchange tube 410 and increasing the sealing performance and pressure resistance at the connection point between the adapter 420 and the heat exchange tube 410.

[0153] In some embodiments, the outer ring 422 is fitted onto one end of the heat exchange tube 410 and injection molded to fit the heat exchange tube 410, and the adapter plate 423 is injection molded onto the sealing member 440. In this way, while realizing the injection molding fit between the adapter 420 and the heat exchange tube 410 and the sealing member 440, the injection molding difficulty of the adapter 420 and the heat exchange tube 410 and the sealing member 440 can be further reduced.

[0154] In a specific example, the outer ring 422 is fitted over the first region. While enabling the adapter 420 to be located at one end of the heat exchange tube 410, it can also reduce the difficulty of connecting the adapter 420 and the heat exchange tube 410 and improve the connection strength between the adapter 420 and the heat exchange tube 410.

[0155] In some other embodiments, the sidewall of the heat exchange channel 411 inside the heat exchange tube 410, which does not need to be filled with cooling medium, can also be roughened. When the transition part 420 is injection molded, the transition part 420 contacts the sidewall of the heat exchange channel 411 inside the heat exchange tube 410, which does not need to be filled with cooling medium. This can also achieve injection molding fit between the transition part 420 and the heat exchange tube 410 and improve the fit strength.

[0156] In other words, it is not limited to attaching the outer ring 422 to the heat exchange tube 410.

[0157] In specific examples, combined Figure 4 , Figure 8 and Figure 9 As shown, the transition section 420 has a thin wall to form an outer ring 422, which is connected to one end of the heat exchange tube 410. The area where the heat exchange medium needs to flow is provided as a through hole to form a transition channel 421, while the other areas are solid to form a transition plate 423.

[0158] In some embodiments, combined with Figure 9 , Figure 10 and Figure 11 As shown, the sealing element 440 seals within the heat exchange channel 411, with a portion of the sealing element 440 extending out of the heat exchange channel 411, so that at least a portion of the sealing element 440 protrudes from the heat exchange channel 411. This means that when the sealing element 440 is disposed within the heat exchange tube 410 to seal the heat exchange channel 411, the portion of the sealing element 440 extending out of the heat exchange channel 411 facilitates the installation and removal of the sealing element 440, and also allows for the use of the adapter 420 to fix the sealing element 440, further improving the positional stability of the sealing element 440 and, to a certain extent, ensuring the working performance of the sealing element 440.

[0159] In some embodiments, the adapter plate 423 is provided with a receiving groove for accommodating the sealing member 440. This allows the portion of the sealing member 440 extending out of the heat exchange channel 411 to be assembled into the receiving groove of the adapter plate 423, thereby fixing the sealing member 440 using the adapter plate 423, or fixing the sealing member 440 using the adapter portion 420, improving the positional stability of the sealing member 440, and ensuring the working performance of the sealing member 440 to a certain extent.

[0160] In summary, the adapter 420 of this application is designed to accommodate the sealing member 440. In this way, when the adapter 420 is injection molded onto the heat exchange tube 410 for the second time, the adapter 420 can be connected to both the heat exchange tube 410 and the sealing member 440 at the same time, thereby improving the positional stability of the sealing member 440 and achieving partial sealing of the heat exchange tube 410.

[0161] In a specific example, during the assembly of the heat exchanger 400, the sealing element 440 can first be placed on the heat exchange tube 410 (e.g., by using an external driving element to push the sealing element 440 into the heat exchange channel 411). Then, the sealing element 440 and the heat exchange tube 410 are integrally injection molded with the adapter 420 as inserts, and the adapter 420 is then injection molded to cover the sealing element 440 and the heat exchange tube 410, so as to achieve the cooperative connection between the adapter 420, the sealing element 440, and the heat exchange tube 410, thereby achieving the sealing of part of the heat exchange channel 411 of the heat exchange tube 410 by using the sealing element 440.

[0162] In some embodiments, combined with Figure 12 and Figure 13 As shown, the sealing element 440 is formed as a block, which is similar in shape to the heat exchange channel 411 to be sealed. The block is fitted into the end of the heat exchange channel 411 to realize the sealing element 440 in the heat exchange tube 410 to seal at least one heat exchange channel 411 and reduce the assembly difficulty of the sealing element 440.

[0163] The plug and the heat exchange channel 411 can be interference-fitted to increase the connection strength between the plug and the heat exchange channel 411, so that the plug can be stably set in the heat exchange channel 411, thereby improving the sealing effect of the plugging component 440.

[0164] It should be noted that the blockage mentioned here can be either a metal blockage or a plastic blockage.

[0165] In some embodiments, the contact length between the plug and the heat exchange channel 411 in the length direction of the heat exchange channel 411 is greater than 10 mm, so as to further increase the connection strength between the plug and the heat exchange channel 411, so that the plug can be stably installed in the heat exchange channel 411, thereby improving the sealing effect of the plugging member 440.

[0166] It should be noted that when multiple heat exchange channels 411 need to be blocked, multiple adjacent heat exchange channels 411 can be blocked. This makes it easier to block multiple heat exchange channels 411 at the same time using one blocking component 440, thereby reducing the difficulty of blocking multiple heat exchange channels 411.

[0167] Of course, multiple sealing elements 440 can be provided, with each sealing element 440 corresponding to a different heat exchange channel 411 to be sealed. This allows the sealing elements 440 to be used to seal the heat exchange channel 411. Alternatively, one sealing element 440 can be used to seal a portion of the heat exchange channel 411.

[0168] Furthermore, when multiple sealing elements 440 are provided, adjacent sealing elements 440 can be independent of each other or connected in conjunction.

[0169] In some embodiments, combined with Figure 5 , Figure 8 and Figure 9 As shown, the heat exchange tube 410 is provided with multiple partition ribs 412 for dividing multiple heat exchange channels 411. This means that the heat exchange tube 410 has multiple partition ribs 412, which are used to divide the heat exchange tube 410 into multiple heat exchange channels 411, reducing the difficulty of forming the multiple heat exchange channels 411. At the same time, the multiple partition ribs 412 also support the heat exchange tube 410, which helps to improve the structural strength and stability of the heat exchange tube 410, ensuring its working performance to a certain extent, and extending its service life.

[0170] Optionally, combined Figure 8 and Figure 9 As shown, the sealing member 440 is provided with at least one insertion slot 441, and at least one partition rib 412 is inserted into the insertion slot 441 to position the sealing member 440 on the heat exchange tube 410 and block the heat exchange channel 411. In this way, while realizing the sealing member 440 is placed in the heat exchange tube 410 to block at least one heat exchange channel 411, the difficulty of fitting the sealing member 440 and the heat exchange tube 410 is reduced, and the fitting quality is improved, so that the sealing member 440 can be stably placed in the heat exchange channel 411, thereby improving the sealing effect of the sealing member 440.

[0171] In some embodiments, combined with Figure 8 and Figure 9As shown, the side wall of the sealing member 440 is provided with a limiting protrusion 442. The limiting protrusion 442 is adapted to contact the end face of the partition rib 412 and / or the heat exchange tube 410 to limit the length of the portion of the sealing member 440 located within the heat exchange channel 411. This means that the limiting protrusion 442 contacts the end face of the partition rib 412; or, the limiting protrusion 442 contacts the end face of the heat exchange tube 410; or, the limiting protrusion 442 contacts both the end face of the partition rib 412 and the end face of the heat exchange tube 410, so as to limit the length of the portion of the sealing member 440 located within the heat exchange channel 411. To a certain extent, this avoids the sealing member 440 from failing to seal the end opening of the heat exchange channel 411, that is, to a certain extent, it avoids some heat exchange medium from filling the end opening of the heat exchange channel 411, thereby improving the sealing effect of the sealing member 440 and helping to reduce the weight of the heat exchanger 400.

[0172] In some embodiments, the limiting protrusion 442 contacts the adapter plate 423 to achieve contact and engagement between the sealing member 440 and the adapter 420, which facilitates the use of the adapter 420 to support the sealing member 440, improves the positional stability of the sealing member 440, and to a certain extent ensures the sealing effect of the sealing member 440.

[0173] In some embodiments, such as Figure 3 As shown, the height of the collection ports 431 of the collectors 430 at both ends of the heat exchange tube 410 is the same. This facilitates the connection of the collection ports 431 at both ends of the heat exchange tube 410 with external components, reducing the difficulty of connection. It also facilitates the delivery of heat exchange medium to the heat exchange tube 410 through the collection ports 431, or the output of heat exchange medium from the heat exchange tube 410 through the collection ports 431, so that the heat exchange medium can flow effectively within the heat exchange tube 410, thus ensuring the heat exchange effect of the heat exchange tube 410 to a certain extent.

[0174] In some embodiments, when the heat exchanger 400 is applied to the battery device 100, the surface of the heat exchange tube 410 perpendicular to its thickness direction can be used to contact the battery cell assembly 120 in order to achieve heat exchange between the heat exchanger 400 and the battery cell assembly 120.

[0175] Meanwhile, the heat exchange tube 410 can also provide stable support, constraint and anti-deformation effect for the battery cell assembly 120.

[0176] In some embodiments, the battery device 100 includes a plurality of battery cell assemblies 120 and a plurality of heat exchangers 400. The plurality of battery cell assemblies 120 are arranged in multiple rows, with each row of battery cell assemblies 120 disposed between two adjacent heat exchangers 400. This allows for simultaneous heat exchange between two heat exchangers 400 and the battery cell assemblies 120, thereby ensuring the heat exchange effect of the heat exchangers 400 to a certain extent, maintaining the temperature of the battery cell assemblies 120 within a suitable temperature range, extending the service life of the battery cell assemblies 120, and improving the safety of the battery cell assemblies 120 in use.

[0177] Optionally, the two sides of the battery cell assembly 120 abut against two adjacent heat exchangers 400 respectively, so that heat can be exchanged on both sides of the battery cell assembly 120, further improving the heat exchange effect of the battery cell assembly 120. At the same time, multiple battery cell assemblies 120 and multiple heat exchangers 400 can mutually abut against each other to improve the positional stability of multiple battery cell assemblies 120 and multiple heat exchangers 400, thereby ensuring the structural stability of the battery device 100 to a certain extent and improving the working performance of the battery device 100.

[0178] In some embodiments, the battery device 100 further includes a connecting pipe (not shown) for connecting adjacent heat exchangers 400, thereby enabling the simultaneous delivery of heat exchange medium to multiple heat exchangers 400 and reducing the difficulty of circulating the heat exchange medium within multiple heat exchangers 400.

[0179] The structure of the connecting pipe is not limited; it can be a single pipe or a combination of multiple pipes.

[0180] The following description of an embodiment of the electrical equipment 1000 of this application is based on the accompanying drawings.

[0181] Combination Figure 1 and Figure 2 As shown, the electrical device 1000 of this application embodiment includes the battery device 100 of the above embodiment, and the battery device 100 is used to provide electrical energy.

[0182] Since the battery device 100 of this application embodiment has the above-mentioned technical effects, the electrical equipment 1000 of this application embodiment also has the above-mentioned technical effects. That is, by adopting the battery device 100 of this application, the working performance of the electrical equipment 1000 can be guaranteed to a certain extent, the safety of the electrical equipment 1000 can be improved, and the service life of the electrical equipment 1000 can be extended.

[0183] It is understood that other configurations and operations of the battery device 100 and the electrical device 1000 according to the embodiments of this application are known to those skilled in the art and will not be described in detail here.

[0184] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0185] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, include: Box (110); A battery cell assembly (120) is disposed within the housing (110); A heat exchanger (400) is disposed within the housing (110) and configured to exchange heat with the battery cell assembly (120); wherein the heat exchanger (400) comprises: A heat exchange tube (410) includes a plurality of heat exchange channels (411); A connecting part (420) is sleeved on one end of the heat exchange tube (410), and the connecting part (420) is provided with multiple connecting channels (421); A collector (430) is fixed to the transition part (420). The collector (430) is provided with a collection port (431) and at least one flow guide channel (435). The collection port (431) is connected to at least one of the heat exchange channels (411). At least two of the heat exchange channels (411) are connected through the flow guide channel (435) and the transition channel (421) to define a heat exchange circuit (450) having at least one bend (451).

2. The battery device according to claim 1, characterized in that, The plurality of the transfer channels (421) and the plurality of the heat exchange channels (411) are connected in a one-to-one correspondence, and the flow guide channel (435) is connected in a corresponding manner to at least two of the transfer channels (421) so that at least two of the heat exchange channels (411) are connected through the flow guide channel (435) to define the heat exchange circuit (450) having at least one of the bends (451).

3. The battery device according to claim 2, characterized in that, Both ends of the heat exchange tube (410) are provided with the transition part (420) and the collector (430); each collector (430) includes a connecting channel (433) connected to the collection port (431), the guide channel (435) is independent and not connected to the connecting channel (433), and each guide channel (435) is provided with two flow holes (4351) spaced apart; The communication channel (433) of each of the current collectors (430) is connected to one of the heat exchange channels (411) via the transition channel (421); Each of the flow channels (435) of each of the current collectors (430) is connected to two of the heat exchange channels (411) through two flow holes (4351) so that the two heat exchange channels (411) are connected and the bend (451) is formed between the heat exchange channel (411) and the flow channel (435).

4. The battery device according to claim 1, characterized in that, The adapter (420) is an injection molded part, and the current collector (430) is fixedly connected to the adapter (420).

5. The battery device according to claim 4, characterized in that, The heat exchange tube (410) is a metal part, and the adapter (420) is injection molded onto the heat exchange tube (410) and formed as an integral part with the heat exchange tube (410).

6. The battery device according to claim 5, characterized in that, The adapter (420) is a plastic part.

7. The battery device according to claim 5, characterized in that, The outer surface of the heat exchange tube (410) is provided with a first region, the roughness of the first region is greater than the roughness of the other regions, and the first region is in contact with the transition part (420).

8. The battery device according to claim 4, characterized in that, The adapter (420) includes an outer ring (422) and an adapter plate (423). The outer ring (422) is fitted over one end of the heat exchange tube (410). The adapter plate (423) is disposed inside the outer ring (422). The plurality of adapter channels (421) pass through the adapter plate (423). The outer ring (422) and / or the adapter plate (423) are injection molded onto the heat exchange tube (410).

9. The battery device according to claim 4, characterized in that, The adapter (420) and the current collector (430) are welded or glued together.

10. The battery device according to claim 9, characterized in that, The current collector (430) is a plastic part.

11. The battery device according to claim 1, characterized in that, The height of the collection ports (431) of the current collectors (430) located at both ends of the heat exchange tube (410) is the same.

12. The battery device according to claim 1, characterized in that, The battery device includes a plurality of battery cell assemblies (120) and a plurality of heat exchangers (400). The plurality of battery cell assemblies (120) are arranged in multiple rows, with each row of battery cell assemblies (120) located between two adjacent heat exchangers (400).

13. An electrical appliance, characterized in that, Includes a battery device according to any one of claims 1-12, the battery device being used to provide electrical energy.

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