Battery device, refrigerant heat exchange device, and electric device

Abstract

This application belongs to the field of battery manufacturing technology, and provides a battery device, a refrigerant heat exchange device, and an electrical device. The battery device includes a housing assembly, a battery cell assembly, a refrigerant heat exchange component, and a connector component. The housing assembly has a receiving cavity; the battery cell assembly is housed in the receiving cavity; the refrigerant heat exchange component includes an inlet / outlet area, a main flow distribution area, and a heat exchange area, with the main flow distribution area arranged between the inlet / outlet area and the heat exchange area; the inlet / outlet area has a first flow channel and a second flow channel with opposite refrigerant flow directions; the main flow distribution area includes at least one first flow channel and at least two second flow channels, with all first flow channels distributed between all second flow channels; the heat exchange area includes a refrigerant heat exchange channel, with the first flow channel connected to the refrigerant heat exchange channel through the first flow channel, and the second flow channel connected to the refrigerant heat exchange channel through the second flow channel; the connector component is connected to the refrigerant heat exchange component. This application aims to improve the temperature uniformity performance of the refrigerant heat exchange component.

Description

[0001] This application claims priority to Chinese Patent Application No. 202420907842.4, filed with the State Intellectual Property Office of China on April 28, 2024, entitled "Heat Exchange Device, Battery and Electrical Device", the entire contents of which are incorporated herein by reference; and claims priority to International Application PCT / CN2025 / 078572, filed on February 21, 2025, entitled "Battery Device, Refrigerant Heat Exchange Device and Electrical Device", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery manufacturing technology, and in particular to a battery device, a refrigerant heat exchange device, and an electrical device. Background Technology

[0003] During the charging and discharging process, the battery devices in new energy vehicles release a lot of heat. The battery devices are usually equipped with heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0004] Typically, refrigerant heat exchange components have inlet and outlet areas, within which multiple flow channels are arranged. Some of these channels allow refrigerant to flow into the heat exchange component, while the rest allow it to flow out. In related technologies, the arrangement of these multiple inlet and outlet channels is often too scattered and disorderly, which can easily lead to disorganized downstream flow distribution and uneven flow, thus affecting the temperature uniformity of the refrigerant heat exchange component itself. Utility Model Content

[0005] The purpose of this application is to provide a battery device, a refrigerant heat exchange device, and an electrical device, aiming to solve the technical problem of poor temperature uniformity of the refrigerant heat exchange components in the battery device.

[0006] In a first aspect, this application provides a battery device, comprising:

[0007] The housing assembly has a receiving cavity;

[0008] The battery cell assembly is housed within the receiving cavity;

[0009] A refrigerant heat exchange component is configured to exchange heat with a battery cell assembly. The refrigerant heat exchange component includes an inlet / outlet area, a main flow distribution area, and a heat exchange area. The main flow distribution area is arranged between the inlet / outlet area and the heat exchange area. The inlet / outlet area has a first flow channel and a second flow channel, both used for refrigerant flow. The flow direction of the refrigerant in the first flow channel is opposite to that in the second flow channel. The main flow distribution area includes at least one first flow channel and at least two second flow channels. All the first flow channels are distributed between all the second flow channels. The heat exchange area includes a refrigerant heat exchange channel. The first flow channels are connected to the refrigerant heat exchange channels through corresponding first flow channels, and the second flow channels are connected to the refrigerant heat exchange channels through corresponding second flow channels.

[0010] The connector component is connected to the refrigerant heat exchange component and communicates with the first flow channel and the second flow channel.

[0011] In this embodiment, all the first flow channels are distributed between all the second flow channels, which makes it easier for the battery device to split the flow from the middle when operating in the cold zone, and makes it easier for the overheated part of the refrigerant heat exchange component to be distributed at the edge position, which is conducive to achieving balanced heat exchange. In addition, when the battery device is heated, it can first heat the battery cells at the edge position where the temperature is relatively lower, thereby improving the effect of the refrigerant heat exchange component on the balanced heat exchange of the battery cell assembly.

[0012] In one embodiment, the number of second channels is even, and all the second channels are symmetrically arranged on both sides of all the first channels.

[0013] In this embodiment, the number of second flow channels is even, which facilitates the symmetrical arrangement of the second flow channels on both sides of multiple first flow channels and facilitates centralized and symmetrical flow diversion.

[0014] In one embodiment, the first flow channel includes a first branch channel and a plurality of second branch channels, each of the first branch channels being connected to the plurality of second branch channels; the first branch channel extends along a second direction, and each of the second branch channels extends along a first direction; the end of the first branch channel away from the second branch channel corresponds to and is connected to the first flow channel, and the end of each second branch channel away from the first branch channel is connected to the refrigerant heat exchange channel in the heat exchange zone; the second direction is perpendicular to the first direction.

[0015] In this embodiment, the first branch channel extends along the second direction, and multiple second branch channels can be arranged at intervals in the second direction and connected to the first branch channel to increase the distribution area of ​​the branching region, which facilitates the improvement of the smoothness of refrigerant flow and helps to form a larger flow area in the heat exchange zone.

[0016] In one embodiment, at least one first flow channel is provided, and at least two second flow channels are provided, with all the first flow channels distributed among all the second flow channels.

[0017] In this embodiment, all the first flow channels are distributed between all the second flow channels. This allows the battery device to easily introduce refrigerant from the center through the first flow channels and connect with the central first flow channels when operating in the cold zone. This facilitates the distribution of overheated parts on the refrigerant heat exchange components to the edge positions, which is beneficial for achieving balanced heat exchange. In addition, when the battery device is in the heating state, the second flow channels can connect with the outer second flow channels to distribute the refrigerant to the edge positions of the refrigerant heat exchange components. This allows the battery cells at the edge positions with relatively lower temperatures to be heated first, improving the effect of the refrigerant heat exchange components on the balanced heat exchange of the battery cell assembly.

[0018] In one embodiment, both the first flow channel and the second flow channel are arranged to extend along a first direction.

[0019] In this embodiment, the first flow channel and the second flow channel are arranged parallel to each other and spaced apart, which helps to improve the regularity of the flow channel arrangement and save space.

[0020] In one embodiment, the heat exchange zone includes two guide channels and multiple main heat exchange channels. The multiple main heat exchange channels are arranged in parallel in a second direction. Along the second direction, each main heat exchange channel is distributed between the two guide channels. Along the first direction, each main heat exchange channel has a connection end arranged far apart from each other. Each second branch channel is correspondingly connected to one connection end of each main heat exchange channel. One end of each guide channel is correspondingly connected to the other connection end of a portion of the main heat exchange channels, and the other end of each guide channel is correspondingly connected to each second channel.

[0021] In this embodiment, multiple main heat exchange channels are arranged between two guide channels, thereby forming the main area for heat exchange of the battery cell module in the area between the two guide channels, which is beneficial to improving the concentration of heat exchange; the guide channels are located at the edge, playing the role of concentrating and distributing the flow, which is beneficial to reducing overheating problems during the cooling process and reducing the problem of uneven heat exchange during the heating and cooling processes.

[0022] In one embodiment, the main branch flow collection area and the heat exchange area form a boundary area at their intersection, and the boundary area extends along a second direction; a first node is formed at the position where each second branch flow channel connects with each main heat exchange flow channel, and a second node is formed at the position where the guide flow channel connects with the second flow channel, and both the first node and the second node are distributed in the boundary area.

[0023] In this embodiment, the first nodes connecting the second branch channel and each main heat exchange channel are all arranged in the boundary area, so that the position of the first node avoids the heat exchange zone. This reduces the resistance and pressure loss of the refrigerant in the refrigerant heat exchange channel in the heat exchange zone, and makes the refrigerant flow more smoothly. This improves the uniformity of temperature distribution on the refrigerant heat exchange component and improves the heat exchange efficiency, so as to achieve the purpose of balancing and rapidly exchanging heat on the battery cell assembly.

[0024] In one embodiment, each main heat exchange channel includes an upstream channel and a downstream channel extending along a first direction and spaced apart in a second direction, with each upstream channel and downstream channel connected at the end furthest from the inlet and outlet areas; the guide channel is connected to the downstream channel, and the second branch channel is connected to the upstream channel.

[0025] In this embodiment, the upstream and downstream channels in each main heat exchange channel are arranged at intervals in the second direction, thereby forming a certain channel coverage area in the second direction. The refrigerant flows independently between each main heat exchange channel, which is conducive to making the refrigerant flow more smoothly.

[0026] In one embodiment, the upstream flow channel includes a plurality of upstream sub-flow channels extending along a first direction and spaced apart in a second direction, the upstream sub-flow channels being interconnected; and / or, the downstream flow channel includes a plurality of downstream sub-flow channels extending along a first direction and spaced apart in a second direction, the downstream sub-flow channels being interconnected.

[0027] In this embodiment, each upstream flow channel adopts a parallel connection of multiple upstream sub-flow channels, and each downstream flow channel adopts a parallel connection of multiple downstream sub-flow channels, which helps to improve flow efficiency and heat exchange efficiency.

[0028] In one embodiment, the upstream flow channel in a portion of the main heat exchange flow channel is adjacent to and thermally connected to the downstream flow channel in the adjacent main heat exchange flow channel, and the downstream flow channel in a portion of the main heat exchange flow channel is adjacent to and thermally connected to the upstream flow channel in the adjacent main heat exchange flow channel.

[0029] In this embodiment, the upstream and downstream channels of the two main heat exchange channels are arranged adjacent to each other. The low temperature of the upstream channel can balance the high temperature of the downstream channel, thereby reducing the temperature of the area on the heat exchange surface corresponding to the downstream channel. This makes it less likely for an overheated zone to form, thus reducing the area of ​​the overheated zone. This is beneficial to improving the heat exchange effect on the battery cell module and making the temperature distribution on the heat exchange surface of the refrigerant heat exchange component more uniform, thereby improving the heat exchange uniformity of the battery cell module.

[0030] In one embodiment, the battery cell assembly includes multiple rows of battery cell groups, each row of battery cell groups including multiple battery cells stacked in a first direction, and the multiple rows of battery cell groups are arranged side by side in a second direction; the refrigerant heat exchange component has a first surface, which is disposed opposite to the battery cell assembly, and the projection area of ​​each row of battery cell groups on the first surface covers at least one main heat exchange channel.

[0031] In this embodiment, the battery cell assembly is arranged into multiple rows of battery cell groups, and the extension direction of each main heat exchange channel is consistent with the arrangement direction of the multiple battery cells in each row of battery cell groups. This allows the multiple battery cells in each row of battery cell groups to have a larger heat exchange area with the main heat exchange channel, and each main heat exchange channel can more effectively exchange heat with each battery cell group, which is beneficial to improving the effect of balanced heat exchange.

[0032] In one embodiment, the housing assembly also has a mounting cavity, in which the connector component is at least partially housed.

[0033] In this embodiment, by providing an installation cavity, the connector component can be at least partially accommodated, which helps to improve space utilization and reduce the risk of interference between the connector component and other external components.

[0034] In one embodiment, the refrigerant heat exchange component has a first surface and a second surface opposite to each other, the first surface being disposed opposite to the battery cell assembly; the refrigerant heat exchange component includes a plurality of mounting holes, which are disposed through the first surface and the second surface and are disposed to avoid the first flow channel, the second flow channel, the first flow channel, the second flow channel and the refrigerant heat exchange channel.

[0035] In this embodiment, by providing mounting holes, it is easy to connect and fix the refrigerant heat exchange component to other components using bolts or other locking devices, thereby improving the convenience of connecting the refrigerant heat exchange component to other components.

[0036] In one embodiment, a plurality of mounting holes are arranged in the central region of the refrigerant heat exchange component along a first direction and spaced apart along a second direction; and / or, a plurality of mounting holes are arranged in the central region of the refrigerant heat exchange component along a second direction and spaced apart along the first direction; the second direction is perpendicular to the first direction.

[0037] In this embodiment, multiple mounting holes are arranged in the middle of the refrigerant heat exchange component and are evenly distributed at intervals, which helps to improve the balance of the force on the refrigerant heat exchange component and makes the layout between the main heat exchange channel and the mounting holes more regular.

[0038] In one embodiment, the refrigerant heat exchange component also has multiple cavities inside, each cavity being configured to avoid the first flow channel, the second flow channel, the first flow channel, the second flow channel, and the refrigerant heat exchange channel.

[0039] In this embodiment, by setting multiple cavities, the flow can be guided and the air can be vented during the welding process, which is beneficial to improving the welding quality and welding sealing, and also to improving the overall structural strength of the refrigerant heat exchange component.

[0040] Secondly, this application provides a refrigerant heat exchange device, which includes a refrigerant heat exchange component in a battery device as described in any of the above claims.

[0041] Thirdly, this application provides an electrical device, including a battery device as described in any of the above, the battery device being used to store or provide electrical energy.

[0042] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0043] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0044] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0045] Figure 2 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 1 ;

[0046] Figure 3 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 2 ;

[0047] Figure 4 An exploded view of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0048] Figure 5 Schematic diagram of the structure of the refrigerant heat exchange channel in the refrigerant heat exchange component of the battery device provided in some embodiments of this application Figure 1 ;

[0049] Figure 6 Schematic diagram of the relative positions of the first and second flow channels within the inlet and outlet areas of the refrigerant heat exchange component in some embodiments of this application. Figure 1 ;

[0050] Figure 7 Schematic diagram of the relative positions of the first and second flow channels within the inlet and outlet areas of the refrigerant heat exchange component in some embodiments of this application. Figure 2 ;

[0051] Figure 8 Schematic diagram of the structure of the refrigerant heat exchange channel in the refrigerant heat exchange component of the battery device provided in some embodiments of this application Figure 2 ;

[0052] Figure 9 A schematic diagram showing the relative positions of the first and second flow channels within the main flow distribution area of ​​the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0053] Figure 10 A schematic diagram showing the relative positions of the main heat exchange channel and the guide channel within the heat exchange zone of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0054] Figure 11 A schematic diagram of the structure of a main heat exchange channel in the heat exchange zone of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0055] Figure 12 A diagram showing the relative positions of the refrigerant heat exchange channel and the battery cell assembly in some embodiments of this application;

[0056] Figure 13 A front view of a refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0057] Figure 14 Schematic diagram of the distribution of mounting holes on the refrigerant heat exchange component in some embodiments of this application Figure 1 ;

[0058] Figure 15 Schematic diagram of the distribution of mounting holes on the refrigerant heat exchange component in some embodiments of this application Figure 2 ;

[0059] Figure 16 Schematic diagram of the distribution of mounting holes on the refrigerant heat exchange component in some embodiments of this application Figure 3 ;

[0060] Figure 17 This is a schematic diagram of the internal temperature distribution of the refrigerant heat exchange component in a battery device provided in some embodiments of this application.

[0061] Explanation of reference numerals in the attached figures:

[0062] 1000. Vehicle; 1100. Battery unit; 1110. Battery cell assembly; 1111. Battery cell group; 1112. Battery cell; 1120. Housing assembly; 1121. Housing body; 1122. Cover; 1123. Housing frame; 1124. Receiving cavity; 1130. Refrigerant heat exchange component; 1131. Inlet / outlet area; 11311. First flow channel; 11312. Second flow channel; 1132. Main branch and collector area; 11321. First flow channel; 11322. Second flow channel; 11323. First branch channel; 11324. Second branch channel; 1133. Heat exchange area; 11331. Main heat exchanger... Hot runner; 11332, guide flow channel; 11333, upstream flow channel; 11334, downstream flow channel; 11335, upstream sub-flow channel; 11336, downstream sub-flow channel; 11337, boundary area; 11338, first node; 11339, second node; 11340, third node; 11341, refrigerant heat exchange flow channel; 1134, heat exchange surface; 1135, first surface; 1136, first sub-component; 1137, second sub-component; 1138, cavity; 1139, mounting hole; 1140, connector component; 1200, controller; 1300, motor; X, first direction; Y, second direction. Detailed Implementation

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

[0064] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein 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 specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

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

[0066] In this document, the term "embodiment" means that a particular 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.

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

[0068] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0069] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0070] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0071] During the charging and discharging process, the battery devices in new energy vehicles release a lot of heat. The battery devices are usually equipped with heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0072] Typically, refrigerant heat exchange components have a main flow distribution area, within which multiple flow channels are arranged. Some of these channels disperse the refrigerant into the heat exchange component, while the remaining channels concentrate the refrigerant's outflow. In related technologies, the arrangement of the multiple inflow and outflow channels is often too scattered and disorderly. This can easily lead to disordered flow distribution in the upstream and downstream channels connected to the main flow distribution area, causing uneven flow distribution and consequently affecting the temperature uniformity of the refrigerant heat exchange component itself.

[0073] For example, the main distribution and collection area has four channels. Two channels are used for the inflow of refrigerant and for the distribution of refrigerant, defined as the first flow channel. The other two channels are used for the outflow of refrigerant and for the collection of refrigerant, defined as the second flow channel. If the four channels are arranged in an alternating manner in a certain direction, such as first channel, second channel, first channel, second channel, it can be seen that when connecting with the downstream channels, it will easily lead to the mutual intersection between adjacent channels, making the distribution too scattered and unconcentrated, which can easily cause the distribution to be unbalanced. In addition, the distribution channels and the collection channels are prone to intersection or need to be avoided, which will cause more difficulties for subsequent distribution, increase the complexity of the subsequent distribution layout, and is not conducive to simplifying the structure.

[0074] Therefore, this application provides a battery device in which first flow channels with the same flow direction in the main diversion and collection area are arranged in the area between second flow channels. This helps to concentrate the arrangement of the first flow channels with the same flow direction. The second flow channels form a wrap around the outside of the first flow channels. The concentrated arrangement of the first flow channels enables more concentrated diversion or collection, and symmetrical diversion and collection can be achieved, realizing the balance of diversion and collection, which is beneficial to improving the uniformity of temperature distribution on the refrigerant heat exchange components.

[0075] Specifically, refer to Figure 2 and Figure 3 As shown, this application embodiment provides a battery device 1100, which may include one or more battery cell assemblies 1110 for providing voltage and capacity. Each battery cell assembly 1110 may include multiple battery cells 1112, which are connected in series, parallel, or mixed connections via a busbar. The battery device 1100 may also be a battery pack, which generally includes a housing assembly 1120 and one or more battery cell assemblies 1110, with the battery cell assemblies 1110 housed within the housing assembly 1120.

[0076] The battery device 1100 disclosed in this application can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and systems that use the battery device 1100 as an energy storage element. Electrical devices can be, but are not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0077] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0078] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 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. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0079] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0080] Please refer to Figure 2 and Figure 3 As shown, Figure 2 and Figure 3This is an exploded view of a battery device 1100 provided in some embodiments of this application. In one embodiment, the battery device 1100 includes a housing assembly 1120 and a battery cell assembly 1110. A receiving cavity 1124 is formed within the housing assembly 1120, and the battery cell assembly 1111 is housed within the receiving cavity 1124. The battery cell assembly 1110 is typically formed by arranging multiple battery cells 1112. Alternatively, the battery cell assembly 1110 can also be a battery module, which is formed by arranging and fixing multiple battery cells 1112 into an independent module. The housing assembly 1120 provides the receiving cavity 1124 for the battery cell assembly 1110, and the housing assembly 1120 can adopt various structures.

[0081] A battery cell 1112 refers to the smallest unit that makes up the battery device 1100. Each battery cell 1112 can be a secondary battery cell or a primary battery cell; it can also be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited to these. The battery cell 1112 can be cylindrical, flat, cuboid, or other shapes.

[0082] According to some embodiments of this application, refer to Figure 2-5 , Figure 8 and Figure 9As shown in the figure, this application provides a battery device 1100, which includes a housing assembly 1120, a battery cell assembly 1110, a refrigerant heat exchange component 1130, and a connector component 1140. The housing assembly 1120 has a receiving cavity 1124; the battery cell assembly 1110 is housed within the receiving cavity 1124; the refrigerant heat exchange component 1130 is configured to exchange heat with the battery cell assembly 1110; the refrigerant heat exchange component 1130 has an inlet / outlet area 1131, a main flow distribution area 1132, and a heat exchange area 1133, with the main flow distribution area 1132 arranged between the inlet / outlet area 1131 and the heat exchange area 1133; the inlet / outlet area 1131 has a first flow channel 11311 and a second flow channel 11312, both used for the flow of refrigerant. The refrigerant flow direction in the first flow channel 11311 is opposite to that in the second flow channel 11312; the main distribution and collection area 1132 includes at least one first flow channel 11321 and at least two second flow channels 11322, all of the first flow channels 11321 are distributed among all the second flow channels 11322; the heat exchange area 1133 includes a refrigerant heat exchange flow channel 11341, the first flow channel 11311 is connected to the refrigerant heat exchange flow channel 11341 through the corresponding first flow channel 11321, and the second flow channel 11312 is connected to the refrigerant heat exchange flow channel 11341 through the corresponding second flow channel 11322; the connector component 1140 is connected to the refrigerant heat exchange component 1130 and is connected to the first flow channel 11311 and the second flow channel 11312.

[0083] Specifically, the battery cell assembly 1110 includes one or more battery cells 1112. The refrigerant heat exchange component 1130 needs to exchange heat with the battery cell assembly 1110. Therefore, the refrigerant heat exchange component 1130 needs to be located close to the battery cell assembly 1110, or the refrigerant heat exchange component 1130 needs to directly contact or abut against the battery cell assembly 1110 to improve the heat exchange effect. When the refrigerant heat exchange component 1130 exchanges heat with the battery cell assembly 1110, a large heat exchange area needs to be formed between the refrigerant heat exchange component 1130 and the battery cell 1112 to improve the heat exchange effect. Therefore, a heat exchange surface 1134 that is close to or in contact with the surface of the battery cell 1112 is formed on the refrigerant heat exchange component 1130. For example, the refrigerant heat exchange component 1130 has a first surface 1135, and the battery cell assembly 1110 is also disposed opposite to the first surface 1135. The heat exchange surface 1134 is a part of the first surface 1135.

[0084] Taking the horizontal placement of the battery device 1100 as an example, the surface of the battery cell 1112 that is close to or in contact with the heat exchange surface 1134 can be the bottom surface of the battery cell 1112. That is to say, the refrigerant heat exchange component 1130 can be located at the bottom of the battery cell assembly 1110. The refrigerant heat exchange component 1130 located at the bottom of the battery cell assembly 1110 can also be called a heat exchange base plate or a cooling base plate.

[0085] For ease of explanation, the following embodiments will be described using an example of a battery device 1100 of this application that is placed horizontally, with the refrigerant heat exchange component 1130 located at the bottom of the battery cell assembly 1110.

[0086] For refrigerant heat exchange component 1130, refer to Figure 5 , Figure 8 and Figure 13 As shown, the refrigerant heat exchange component 1130 includes a heat exchange zone 1133, and a refrigerant heat exchange channel 11341 is distributed in the heat exchange zone 1133. Refrigerant flows in the refrigerant heat exchange channel 11341. The heat exchange zone 1133 is mainly used for heat exchange with the battery cell assembly 1110. The heat exchange surface 1134 is distributed in the heat exchange zone 1133.

[0087] The refrigerant heat exchange channel 11341 can be a perforated structure inside the refrigerant heat exchange component 1130. For example, the refrigerant heat exchange component 1130 is plate-shaped, and through-hole structures or cavity structures with a certain extension length and extension path are formed inside the plate of the refrigerant heat exchange component 1130. The through-hole structure or cavity structure forms the refrigerant heat exchange channel 11341. The refrigerant heat exchange component 1130 can be integrally molded, and the refrigerant heat exchange channel 11341 can be manufactured by gas-assisted or water-assisted molding; alternatively, the refrigerant heat exchange component 1130 can also be assembled. For example, the refrigerant heat exchange component 1130 includes a first sub-component 1136 and a second sub-component 1137. A groove structure with a predetermined extension length and shape is formed on the second sub-component 1137. The groove structure can be fabricated by stamping. The first sub-component 1136 and the second sub-component 1137 are fixedly or detachably connected, and the groove opening is closed to form a through-hole structure or a cavity structure, which forms the refrigerant heat exchange channel 11341. The refrigerant heat exchange channel 11341 should be located close to the first surface 1135, and its extension path can be parallel to the first surface 1135 to increase the heat exchange effect. The battery cell assembly 1110 is disposed opposite to the first surface 1135.

[0088] For example, the first sub-component 1136 can be an upper plate, and the second sub-component 1137 can be a lower plate. The refrigerant heat exchange channel 11341 is formed on the lower plate by stamping. The first sub-component 1136 and the second sub-component 1137 can be welded together by brazing, and the welded area can play a role in heat transfer.

[0089] For the inlet / outlet area 1131, which is mainly used for introducing and exporting refrigerant, it can be seen that the inlet / outlet area 1131 should be equipped with a refrigerant inlet channel and a refrigerant outlet channel. The refrigerant flow direction in the refrigerant inlet channel and the refrigerant outlet channel should be opposite. Therefore, in this example, the refrigerant inlet channel and the refrigerant outlet channel are defined as the first flow channel 11311 and the second flow channel 11312, respectively. The refrigerant flow direction in the first flow channel 11311 is opposite to the refrigerant flow direction in the second flow channel 11312.

[0090] Typically, due to the large flow rate of refrigerant, one or more first flow channels 11311 and multiple second flow channels 11312 are required to simultaneously handle the input and output of refrigerant in order to meet the refrigerant delivery requirements and reduce the problems of congestion and increased resistance when using a single flow channel.

[0091] For the main diversion and collection area 1132, the main diversion and collection area 1132 is arranged between the inlet / outlet area 1131 and the heat exchange area 1133 to serve as a diversion and collection area. Specifically, the main diversion and collection area 1132 has one or more first flow channels 11321 and multiple second flow channels 11322 arranged within it. The number of first flow channels 11321 should be consistent with the number of first flow channels 11311 and be matched and connected. Taking the first flow channel 11321 as a flow channel for branching and the second flow channel 11322 as a flow channel for converging as an example, it can be seen that, correspondingly, the first flow channel 11311 is the inlet flow channel for introducing refrigerant, and the second flow channel 11312 is the outlet flow channel for discharging refrigerant; each first flow channel 11311 should be connected to each first flow channel 11321, and the number of first flow channels 11311 should be equal to the number of first flow channels 11321. The first flow channel 11321 is used to receive refrigerant from... The refrigerant flowing out of the first flow channel 11311 is used to divert the refrigerant so that it can enter the refrigerant heat exchange channel 11341 in a dispersed manner. Each second flow channel 11312 should be connected to each second flow channel 11322. The number of second flow channels 11312 should be equal to the number of second flow channels 11322. The second flow channels 11322 are used to receive the refrigerant flowing out of the refrigerant heat exchange channel 11341 and centrally transport the refrigerant to each second flow channel 11312.

[0092] In the main diversion and collection area 1132, when there are multiple first flow channels 11321 and multiple second flow channels 11322, the multiple first flow channels 11321 are arranged adjacently and distributed among all the second flow channels. That is, all the first flow channels 11321 are distributed between two adjacent second flow channels 11322, thereby realizing the centralized distribution of multiple first flow channels 11321. For example, in the case of cooling the battery cell assembly 1110, the first flow channel 11311 is used to introduce the refrigerant, and the first flow channel 11321 is used to divert the refrigerant. It can be seen that the concentrated distribution of multiple first flow channels 11321 realizes the concentrated diversion of the refrigerant. All the first flow channels 11321 are arranged between two of the second flow channels 11322, so that the refrigerant can be concentratedly diverted, diffused and transported from the middle to the outside, and transported to the refrigerant heat exchange channel 11341 in each heat exchange zone 1133. Understandably, multiple second flow channels 11322 are distributed at the two side edges, and the second flow channels 11322 and the first flow channel 11321 do not intersect or overlap, which effectively achieves mutual avoidance between the first flow channel 11321 and the second flow channel 11322, making the layout more reasonable. In addition, considering that the return part of the refrigerant heat exchange flow channel 11341 is prone to overheating, in this example, multiple second flow channels 11322 are distributed at the two side edges, so that the return part of the refrigerant heat exchange flow channel 11341 in the heat exchange zone 1133 can be arranged at the edge of the refrigerant heat exchange component 1130. This is beneficial to make the overheated part on the refrigerant heat exchange component 1130 correspond to the edge of the battery cell assembly 1110, or to make the overheated part on the refrigerant heat exchange component 1130 directly avoid the battery cell assembly 1110, thereby reducing the impact of the overheated part on the heat exchange of the battery cell assembly 1110.

[0093] Of course, when the battery cell assembly 1110 is heated, the first flow channel 11311 can be used to discharge the refrigerant, and the second flow channel 11312 can be used to introduce the refrigerant. Therefore, the first flow channel 11321 is used to collect the refrigerant, and the second flow channel 11322 is used to distribute the refrigerant. It is known that all the first flow channels 11321 are concentrated in the middle region between the two second flow channels 11322; that is, multiple second flow channels 11322 are distributed at the two edges of the middle region. The above configuration is mainly based on the fact that, when heated, the battery cell assembly 1110 is in a low-temperature state. The battery cells 1112 located at the edge of the battery cell assembly 1110 generally come into contact with the metal housing assembly 1120. Therefore, the temperature of the battery cells 1112 located at the edge is lower than that of the battery cells 1112 located in the middle region. Thus, when heating, it is more beneficial to prioritize heating the battery cells 1112 located at the edge to reduce the temperature difference between the inlet and outlet of the refrigerant at the connector component 1140.

[0094] In addition, the structural form in which multiple first flow channels 11321 are arranged adjacently and distributed between any two adjacent second flow channels 11322 (or can be understood as distributed between all second flow channels 11322) makes it less likely for the second flow channels 11322 and the first flow channels 11321 to intersect or overlap, thus achieving good mutual avoidance between the first flow channels 11321 and the second flow channels 11322, making the layout more reasonable.

[0095] For connector component 1140, connector component 1140 is connected to refrigerant heat exchange component 1130. Connector component 1140 is used to connect to an external refrigerant delivery device for conveying refrigerant, so that refrigerant can enter the interior of refrigerant heat exchange component 1130 through connector component 1140. Therefore, it can be seen that connector component 1140 must have multiple flow channels inside to communicate with the first flow channel 11311 and the second flow channel 11312 respectively.

[0096] In this embodiment, all the first flow channels 11321 are distributed between two adjacent second flow channels 11322 (or can be understood as distributed in all the second flow channels 11322), so that the battery device 1100 can easily split the flow from the middle under cold zone conditions, and can easily distribute the overheated part of the refrigerant heat exchange component 1130 to the edge position, which is conducive to achieving balanced heat exchange; in addition, under heating conditions, the battery device 1100 can first heat the battery cells 1112 with relatively lower temperature at the edge position, thereby improving the effect of the refrigerant heat exchange component 1130 on the balanced heat exchange of the battery cell assembly 1110.

[0097] In some embodiments, refer to Figure 5 and Figure 9 As shown, the number of second flow channels 11322 is even, and multiple second flow channels 11322 are symmetrically arranged on both sides of all the first flow channels 11321.

[0098] It is known that multiple second flow channels 11322 are provided. For example, the number of second flow channels 11322 can be any integer greater than 1, such as 2, 3, 4, 5, etc. That is to say, the number of second flow channels 11322 on both sides of the multiple first flow channels 11321 can be set asymmetrically. For example, the number of second flow channels 11322 on one side is 1, and the number of second flow channels 11322 on the other side can be 2.

[0099] However, considering that the structure of the battery cell assembly 1110 usually has a central region and symmetrically distributed regions on both sides of the central region, it is usually necessary to arrange the refrigerant heat exchange channels 11341 symmetrically to correspond to the structure of the battery cell assembly 1110. Therefore, in order to facilitate symmetrical flow distribution, the number of second channels 11322 is controlled to be even, so that multiple second channels 11322 can be symmetrically arranged on both sides of the first channel 11321.

[0100] In this embodiment, the number of second flow channels 11322 is even, which facilitates the symmetrical arrangement of the second flow channels 11312 on both sides of the first flow channel 11321 and facilitates centralized and symmetrical flow diversion.

[0101] In some embodiments, refer to Figure 5 , Figure 8 , Figure 9 and Figure 12 As shown, the first flow channel 11321 includes a first branch channel 11323 and a plurality of second branch channels 11324, the first branch channel 11323 and the plurality of second branch channels 11324 are connected and configured; the first branch channel 11323 extends along the second direction Y, and each of the second branch channels 11324 extends along the first direction X; the end of the first branch channel 11323 away from the second branch channel 11324 is connected and configured correspondingly to the first flow channel 11311, and the end of each of the second branch channels 11324 away from the first branch channel 11323 is connected and configured to be connected to the refrigerant heat exchange channel 11341 in the heat exchange zone 1133; the second direction Y is perpendicular to the first direction X.

[0102] Specifically, the first direction X and the second direction Y are two perpendicular directions, both of which are parallel to the first surface 1135. Generally, the first direction X can be understood as the length direction of the refrigerant heat exchange component 1130, and the second direction Y is understood as the width direction of the second refrigerant heat exchange component 1130.

[0103] The first branch channel 11323 and each of the second branch channels 11324 are connected and configured. The refrigerant first enters each of the second branch channels 11324 from the first branch channel 11323, and then enters the refrigerant heat exchange channel 11341 (specifically the upstream channel 11333 of each main heat exchange channel 11331) in the heat exchange zone 1133. The first branch channel 11323 and the second branch channel 11324 form a branching area on the first surface 1135 of the refrigerant heat exchange component 1130.

[0104] One or more first diversion channels 11323 may be provided, and the number of first diversion channels 11323 should be the same as the number of first flow channels 11311. One first flow channel 11311 is connected to one first diversion channel 11323. One first diversion channel 11323 is connected to multiple second diversion channels 11324 respectively. The first diversion channel 11323 extends along the second direction Y, so that the multiple second diversion channels 11324 can be arranged at intervals in the second direction Y to cover a wider width in the second direction Y, thereby increasing the coverage area of ​​the diversion area. In addition, the extension direction of the first branch channel 11323 corresponds exactly to the arrangement direction of each of the main heat exchange channels 11331 described below, which facilitates the connection between each of the second branch channels 11324 and the corresponding main heat exchange channel 11331. This allows the refrigerant to flow more smoothly in the first branch channel 11323 and helps to reduce the flow path of the refrigerant into the second branch channel 11324 and the main heat exchange channel 11331 described below, thereby reducing heat exchange losses.

[0105] In addition, each of the second branch channels 11324 extends along the first direction X and is consistent with the flow direction of the upstream channel 11333 in the main heat exchange channel 11331 described below. This allows the refrigerant to flow more smoothly from each of the second branch channels 11324 into each of the upstream channels 11333, and helps to shorten the flow path of the refrigerant in the upstream channels 11333, thereby reducing heat loss.

[0106] The purpose of refrigerant entering the refrigerant heat exchange component 1130 is to reduce the temperature difference problem of the refrigerant heat exchange component 1130 caused by uneven flow distribution. Refrigerant flow distribution is easily affected by refrigerant dryness. The higher the dryness, the more difficult the flow distribution. When the refrigerant enters the refrigerant heat exchange component 1130, the dryness is the lowest. Therefore, the refrigerant is least affected when flow distribution is carried out in this area. This area is generally divided into multiple second flow channels 11324. The purpose is to set multiple upstream flow channels 11333 as described below, so as to reduce the impact of poor heat exchange capacity of a certain main heat exchange flow channel 11331 on the uniform temperature of the cold plate.

[0107] In this embodiment, the first diversion channel 11323 is extended along the second direction Y, and multiple second diversion channels 11324 can be arranged at intervals along the second direction Y and connected to the first diversion channel 11323 to increase the distribution area of ​​the diversion area, which facilitates the improvement of the smoothness of refrigerant flow and helps to form a larger flow area in the heat exchange zone 1133.

[0108] In some embodiments, refer to Figure 5-8 As shown, there is at least one first flow channel 11311 and at least two second flow channels 11312, and all the first flow channels 11311 are distributed among all the second flow channels 11312.

[0109] Taking the example of having multiple first flow channels 11311, it can be understood that all the first flow channels 11311 are distributed among all the second flow channels 11312. This means that all the first flow channels 11311 are arranged adjacently and distributed between two adjacent second flow channels 11312, thereby achieving the purpose of centralized distribution of all the first flow channels 11311. For example, when cooling the battery cell assembly 1110, the first flow channel 11311 is used to introduce the refrigerant. It can be seen that the concentrated distribution of all the first flow channels 11311 achieves the concentrated introduction of the refrigerant. Each first flow channel 11311 is adjacent to and arranged between two second flow channels 11312, so that the refrigerant can be concentratedly diffused and transported from the middle to the outside and transported to each first flow channel 11321. Correspondingly, all the first flow channels 11321 will also be adjacent to be concentrated and can be concentrated in the middle area, thereby achieving the effect of concentrated diversion in the middle. Since all the first flow channels 11321 can be distributed in the area between any two second flow channels 11322, that is, multiple second flow channels 11322 will be distributed at the two side edges, and the second flow channels 11322 and the first flow channels 11321 will not intersect or overlap.

[0110] Of course, when heating the battery cell assembly 1110, the first flow channel 11311 can also be used to discharge refrigerant. Therefore, the second flow channel 11312 is used to introduce refrigerant. It is known that all the first flow channels 11311 are adjacent to each other and arranged between the two second flow channels 11312. Correspondingly, multiple first flow channels 11321 will also be concentrated and can be concentrated in the middle area between the two second flow channels 11322. That is to say, multiple second flow channels 11322 will be distributed at the two side edges of the middle area.

[0111] In addition, the structure in which all the first flow channels 11311 are arranged adjacently and distributed between two adjacent second flow channels 11312 makes it less likely for the second flow channel 11322 and the first flow channel 11321 to intersect or cross each other, thus achieving good mutual avoidance between the first flow channel 11321 and the second flow channel 11322, making the layout more reasonable.

[0112] Furthermore, the connector component 1140 necessarily has multiple flow channels inside to communicate with the first flow channel 11311 and the second flow channel 11312 respectively. Taking the inlet / outlet area 1131, which includes two first flow channels 11311 and two second flow channels 11312, as an example, with the first flow channel 11311 used for introducing refrigerant and the second flow channel 11312 used for discharging refrigerant, the two first flow channels 11311 are arranged adjacently and located between the two second flow channels 11312. Correspondingly, there are two first flow channels 11321 and two second flow channels 11322. The two first flow channels 11321 are located between the two second flow channels 11312. Between channels 11322, the two first flow channels 11321 can be concentrated in the middle for flow diversion, making the flow diversion more concentrated. Correspondingly, two inflow channels and two outflow channels can be opened inside the connector component 1140. The two inflow channels can be connected to the two first flow channels 11311 respectively, and the two outflow channels can be connected to the two second flow channels 11312 respectively. The inflow channels and outflow channels are arranged symmetrically, which helps to make the force of the refrigerant on the connector component 1140 more balanced. In addition, inside the connector component 1140, two adjacent inflow channels can be merged to form a total inflow channel, which helps to simplify the flow channel structure inside the connector component 1140.

[0113] In this embodiment, all the first flow channels 11311 are distributed among all the second flow channels 11312. This allows the battery device 1100 to easily introduce refrigerant from the center through the first flow channels 11311 and connect with the first flow channel 11321 in the center when operating in the cold zone. This facilitates the distribution of overheated parts on the refrigerant heat exchange component 1130 to the edge, which is beneficial for achieving balanced heat exchange. In addition, when the battery device 1100 is heating, it can connect with the outer second flow channel 11322 through the second flow channels 11312 to distribute the refrigerant to the edge of the refrigerant heat exchange component 1130. This allows the battery cells 1112 at the edge, where the temperature is relatively lower, to be heated first, thereby improving the effect of the refrigerant heat exchange component 1130 on the balanced heat exchange of the battery cell assembly 1110.

[0114] In some embodiments, refer to Figure 5 and Figure 6As shown, the number of second flow channels 11312 is even, and multiple second flow channels 11312 are symmetrically arranged on both sides of all the first flow channels 11311.

[0115] It is known that multiple second flow channels 11312 are provided. For example, the number of second flow channels 11312 can be any integer greater than 1, such as 2, 3, 4, 5, etc. That is to say, the number of second flow channels 11312 on both sides of the first flow channel 11311 can be set asymmetrically. For example, the number of second flow channels 11312 on one side is 1, and the number of second flow channels 11312 on the other side can be 2.

[0116] However, considering that the structure of the battery cell assembly 1110 usually has a central region and symmetrically distributed regions on both sides of the central region, it is usually necessary to arrange the refrigerant heat exchange channels 11341 symmetrically to correspond to the structure of the battery cell assembly 1110. Therefore, in order to facilitate symmetrical flow distribution, the number of second flow channels 11312 is controlled to be even, so as to facilitate the symmetrical arrangement of multiple second flow channels 11312 on both sides of the first flow channel 11311.

[0117] In this embodiment, the number of second flow channels 11312 is even, which facilitates the symmetrical arrangement of the second flow channels 11312 on both sides of the first flow channel 11311 and facilitates centralized and symmetrical flow diversion.

[0118] In some embodiments, refer to Figure 6 and Figure 7 As shown, the first flow channel 11311 and the second flow channel 11312 are both arranged to extend along the first direction X.

[0119] Specifically, both the first flow channel 11311 and the second flow channel 11312 extend along the first direction X. It can be understood that each first flow channel 11311 and each second flow channel 11312 forms a straight, direct-flow channel structure. This means that each first flow channel 11311 and each second flow channel 11312 is arranged parallel to and spaced apart. In other words, multiple first flow channels 11311 and multiple second flow channels 11312 are arranged spaced apart in a direction perpendicular to the first direction X, which can be defined as the second direction Y. The straight, spaced-apart flow channels utilize space more efficiently and result in a more regular arrangement between the channels.

[0120] In this example, since the first flow channel 11311 is connected to the first flow channel 11321, and the second flow channel 11312 is connected to the second flow channel 11322, and since the inlet / outlet area 1131, the main branch flow collection area 1132, and the heat exchange area 1133 are arranged sequentially in the first direction X.

[0121] It can be seen that there must be at least one first flow channel 11311 and one second flow channel 11312 arranged adjacent to each first flow channel 11311 and each second flow channel 11312. Heat exchange can be carried out between the adjacent first flow channels 11311 and second flow channels 11312, which is beneficial to improving the uniformity of temperature distribution between the two adjacent channels.

[0122] In this embodiment, the first flow channel 11311 and the second flow channel 11312 are arranged parallel to each other and spaced apart, which helps to improve the regularity of the flow channel arrangement and save space.

[0123] In some embodiments, refer to Figure 5 , Figure 8 and Figure 12 As shown, the heat exchange zone 1133 includes two guide channels 11332 and multiple main heat exchange channels 11331. The multiple main heat exchange channels 11331 are arranged in parallel along the second direction Y. Along the second direction Y, each main heat exchange channel 11331 is distributed between the two guide channels 11332. Along the first direction X, each main heat exchange channel 11331 has a first end and a second end arranged far apart. Each second branch channel 11324 is correspondingly connected to the first end of each main heat exchange channel 11331. One end of each of the two guide channels 11332 is respectively connected to the second end of a portion of the main heat exchange channels 11331, and the other end of each of the two guide channels 11332 is respectively connected to a portion of the second channels 11322.

[0124] Specifically, multiple main heat exchange channels 11331 are provided, and these multiple main heat exchange channels 11331 are arranged at intervals and connected in the second direction Y to form a parallel flow channel structure. One main heat exchange channel 11331 can be understood as a circulation loop. Therefore, multiple circulation loops can be formed in the second direction Y. Each circulation loop can exchange heat with a portion of the battery cell assembly 1110, which helps to make the heat exchange of the refrigerant heat exchange component 1130 to the battery cell 1112 more sufficient and uniform.

[0125] Multiple branch flow channels are arranged in parallel with multiple main heat exchange flow channels 11331, thereby forming multiple independent circulation loops. This facilitates the control of multiple circulation loops and allows for targeted heat exchange of the battery cell module 1110, which helps to improve the uniformity of heat exchange.

[0126] The first end and the second end can be understood as two ports of the main heat exchange channel 11331, one as the inlet and the other as the outlet. The first end can be arranged close to the second branch channel 11324. Therefore, the number of second branch channels 11324 can be the same as the number of main heat exchange channels 11331, so that each second branch channel 11324 can be connected to the first end of each main heat exchange channel 11331 in a one-to-one correspondence. Then, in the first direction X, the second end of the main heat exchange channel 11331 should be located near the edge of the heat exchange zone 1133. The guide channel 11332 can be connected to the second end of each main heat exchange channel 11331, so that the guide channel 11332 can always be located at the edge of the refrigerant heat exchange component 1130, so as to guide the refrigerant at the edge.

[0127] Along the second direction Y, each main heat exchange channel 11331 is distributed between two guide channels 11332, meaning that the two guide channels 11332 are arranged at the edge of the entire heat exchange zone 1133. The guide channel 11332 can be understood as a channel used to guide the refrigerant to flow concentratedly between each main heat exchange channel 11331 and the second channel 11322. For example, under cooling conditions, the guide channel 11332 is used to guide the refrigerant flowing back from each main heat exchange channel 11331 from the two side edges of the refrigerant heat exchange component 1130 to the second channel 11322. The guide channel 11332 is located at the edge to correspond to the battery cell 1112 located at the edge, reducing the impact of overheating on the battery cell 1112. For example, in the heating condition, the guide channel 11332 is used to guide the refrigerant in the second channel 11322 from both sides of the refrigerant heat exchange component 1130 to each main heat exchange channel 11331, so that the battery cells 1112 located at the edge with a relatively lower temperature can be heated first, thereby improving the heat exchange uniformity.

[0128] In this embodiment, multiple main heat exchange channels 11331 are arranged between two guide channels 11332, thereby forming a main area for heat exchange of the battery cell assembly 1110 in the area between the two guide channels 11332, which is beneficial to improve the concentration of heat exchange; the guide channels 11332 are located at the edge, playing the role of concentrating and distributing the flow, which is beneficial to reduce overheating problems during the cooling process and reduce the problem of uneven heat exchange during the heating and cooling processes.

[0129] In some embodiments, refer to Figure 5 , Figure 8 and Figure 10 As shown, the main flow distribution area 1132 and the heat exchange area 1133 form a boundary region 11337 at their intersection, and the boundary region 11337 extends along the second direction Y. The position where each second flow channel 11324 connects with each main heat exchange channel 11331 forms a first node 11338, and the position where the guide channel 11332 connects with the second flow channel 11322 forms a second node 11339. The first node 11338 and the second node 11339 are both distributed in the boundary region 11337.

[0130] Specifically, the main diversion and collection area 1132 and the heat exchange area 1133 are arranged adjacent to each other. Therefore, a boundary area 11337 is formed in the area where the main diversion and collection area 1132 and the heat exchange area 1133 intersect and connect. Since the main diversion and collection area 1132 and the heat exchange area 1133 are arranged in the first direction X, it can be known that the boundary area 11337 should form an area extending along the second direction Y on the first surface 1135. Alternatively, it can be directly understood that the boundary area 11337 extends in the second direction Y. The second direction Y can be understood as the length direction of the boundary area 11337. Therefore, the boundary area 11337 should also have a certain width in the first direction X.

[0131] Since a second branch channel 11324 is connected to a main heat exchange channel 11331, the positions where each second branch channel 11324 is connected to each main heat exchange channel 11331 form a first node 11338. The first node 11338 can be understood as the position where multiple channels intersect and connect. By arranging all the first node sections 11338 within the boundary area 11337, no first node sections 11338 will appear within the coverage area of ​​each main heat exchange channel 11331. That is, no first node sections 11338 will be formed within the corresponding heat exchange surface 1134 area. This allows for better control over the number and arrangement of the first node sections 11338, ensuring that the first node sections 11338 are distributed on one side of the heat exchange zone 1133 and do not extend into the interior or middle area of ​​the heat exchange zone 1133. No first node sections 11338 will be formed in the middle flow area of ​​each main heat exchange channel 11331, thus eliminating the flow resistance and pressure drop problems caused by flow splitting and converging. This improves the temperature uniformity and heat exchange capacity of the heat exchange zone 1133.

[0132] In this embodiment, the first node 11338 connecting the second branch channel 11324 and each main heat exchange channel 11331 is arranged in the junction area 11337, so that the position of the first node 11338 avoids the heat exchange zone 1133. This reduces the resistance and pressure loss of the refrigerant in the refrigerant heat exchange channel 11341 in the heat exchange zone 1133, making the refrigerant flow smoother. This improves the uniformity of temperature distribution on the refrigerant heat exchange component 1130 and increases the heat exchange efficiency, so as to achieve the purpose of balancing and rapidly exchanging heat on the battery cell assembly 1110.

[0133] In some embodiments, refer to Figure 5 , Figure 8 and Figure 11 As shown, each main heat exchange channel 11331 includes an upstream channel 11333 and a downstream channel 11334 extending along the first direction X and arranged at intervals along the second direction Y. Each upstream channel 11333 and downstream channel 11334 is connected at the end away from the inlet and outlet area 1131. The guide channel 11332 is connected to the downstream channel 11334, and the second branch channel 11324 is connected to the upstream channel 11333.

[0134] Specifically, each main heat exchange channel 11331 includes an upstream channel 11333 and a downstream channel 11334 that are connected. The second branch channel 11324 is connected to the upstream channel 11333. The position where the second branch channel 11324 connects to the upstream channel 11333 forms a first node 11338. The guide channel 11332 is connected to the downstream channel 11334 and forms a third node 11340 at the connection position. The third node 11340 is located at the end of the main heat exchange channel 11331 away from the second branch channel 11324 and is located at the edge of the main heat exchange channel 11331. In cooling mode, the refrigerant flows sequentially from the first flow channel 11311, the first branch channel 11323, and the second branch channel 11324 through the first node 11338 into the upstream flow channel 11333, the downstream flow channel 11334, the guide channel 11332, the second flow channel 11322, and the second flow channel 11312, thus achieving an inward-to-outward refrigerant flow in the inlet / outlet area 1131. In heating mode, the refrigerant flows sequentially from the second flow channel 11312, the guide channel 11332, the downstream flow channel 11334, and the upstream flow channel 11333 through the first node 11338 into the second branch channel, the first branch channel, and the first flow channel 11311, thus achieving an outward-to-inward refrigerant flow in the inlet / outlet area 1131.

[0135] In the second direction Y, the upstream flow channel 11333 and the downstream flow channel 11334 are arranged opposite to each other, and the connection between the upstream flow channel 11333 and the downstream flow channel 11334 can be bent. Both the upstream flow channel 11333 and the downstream flow channel 11334 extend a certain length along the first direction X. The refrigerant can flow back and forth between the upstream flow channel 11333 and the downstream flow channel 11334.

[0136] In this embodiment, the upstream flow channel 11333 and the downstream flow channel 11334 in each main heat exchange flow channel 11331 are arranged at intervals in the second direction Y, thereby forming a certain flow channel coverage area in the second direction Y. The refrigerant flows independently between each main heat exchange flow channel 11331, which is conducive to making the refrigerant flow more smoothly.

[0137] In some embodiments, refer to Figure 11 As shown, the upstream flow channel 11333 includes a plurality of upstream sub-flow channels 11335 extending along a first direction X and arranged at intervals along a second direction Y, and the upstream sub-flow channels 11335 are interconnected; and / or, the downstream flow channel 11334 includes a plurality of downstream sub-flow channels 11336 extending along a first direction X and arranged at intervals along a second direction Y, and the downstream sub-flow channels 11336 are interconnected.

[0138] Specifically, the upstream flow channel 11333 may include multiple upstream sub-flow channels 11335. These multiple upstream sub-flow channels 11335 extend in the first direction X and are opposite and spaced apart in the second direction Y, thus forming a structure in which multiple direct-flow channels are connected in parallel. This allows for the arrangement of a larger number of upstream sub-flow channels 11335 within the same area. Within the same area, the width of each upstream sub-flow channel 11335 becomes narrower and the density increases, thereby increasing the flow velocity of the refrigerant within each upstream sub-flow channel 11335. This, in turn, helps to increase the heat exchange area and improve the heat exchange efficiency.

[0139] Multiple upstream sub-channels 11335 are connected to the same first node 11338. The second branch channel can connect multiple upstream sub-channels 11335 through the first node 11338. The refrigerant can flow simultaneously in multiple upstream sub-channels 11335, thereby improving the efficiency of the flow and helping to improve the smoothness of the refrigerant flow and reduce pressure drop loss.

[0140] Optionally, the downstream flow channel 11334 may include multiple downstream sub-flow channels 11336. These multiple downstream sub-flow channels 11336 extend in the first direction X and are opposite and spaced apart in the second direction Y, thus forming a structure in which multiple direct-flow channels are connected in parallel. This allows for the arrangement of a larger number of downstream sub-flow channels 11336 within the same area. Within the same area, the width of each downstream sub-flow channel 11336 becomes narrower, and the density increases, increasing the flow velocity of the refrigerant within each downstream sub-flow channel 11336. This, in turn, helps to increase the heat exchange area and improve heat exchange efficiency.

[0141] Multiple downstream sub-channels 11336 can be connected to one end of the inlet channel, allowing the refrigerant to circulate simultaneously in multiple downstream sub-channels 11336, thereby improving circulation efficiency, enhancing the smoothness of refrigerant flow, and reducing pressure drop loss.

[0142] In this embodiment, each upstream flow channel 11333 is connected in parallel with multiple upstream sub-flow channels 11335, and each downstream flow channel 11334 is connected in parallel with multiple downstream sub-flow channels 11336, which helps to improve flow efficiency and heat exchange efficiency.

[0143] In some embodiments, refer to Figure 5 and Figure 8 As shown, the upstream flow channel 11333 in part of the main heat exchange flow channel 11331 is adjacent to and thermally matched with the downstream flow channel 11334 in the adjacent main heat exchange flow channel 11331, and the downstream flow channel 11334 in part of the main heat exchange flow channel 11331 is adjacent to and thermally matched with the upstream flow channel 11333 in the adjacent main heat exchange flow channel 11331.

[0144] Reference Figure 11 As shown, the upstream flow channel 11333 and the downstream flow channel 11334 in each main heat exchange flow channel 11331 are connected to form a heat exchange loop. That is to say, the main heat exchange flow channel 11331 has one heat exchange inlet and one heat exchange outlet. It should be noted that the upstream flow channel 11333 and the downstream flow channel 11334 can be understood as a direct flow channel structure, and the part where the upstream flow channel 11333 and the downstream flow channel 11334 are connected can be understood as a bend flow channel structure.

[0145] Assuming that the downstream flow channels 11334 of the multiple main heat exchange channels 11331 are centrally arranged, the refrigerant heat exchange component 1130 will form a large area of ​​overheated region on the heat exchange surface 1134 area corresponding to the downstream flow channel 11334 and the area corresponding to the guide flow channel 11332. The overheated region refers to the area with weak heat exchange capacity. If the area of ​​the overheated region is too large, it will affect the overall heat exchange effect of the battery cell module 1110, causing the temperature of the battery cell module 1110 to rise, thereby affecting the performance and service life of the battery cell module 1110 and the battery device 1100.

[0146] Analyzing the overheating problem, since the refrigerant in the upstream channel 11333 has a strong heat exchange capacity, the temperature of the area on the heat exchange surface 1134 corresponding to the upstream channel 11333 is low. Conversely, the refrigerant in the downstream channel 11334 has a relatively weak heat exchange capacity, resulting in a higher temperature in the area on the heat exchange surface 1134 corresponding to the downstream channel 11334. Therefore, to reduce the area of ​​the overheated region, multiple main heat exchange channels 11331 in the refrigerant heat exchange channels 11341 are arranged side-by-side. Furthermore, the upstream channels 11333 in some of the main heat exchange channels 11331 are adjacent to and thermally coordinated with the downstream channels 11334 in adjacent main heat exchange channels 11331. The downstream flow channel 11334 in 31 is adjacent to and thermally coordinated with the upstream flow channel 11333 in the adjacent main heat exchange flow channel 11331. That is, the upstream flow channel 11333 and the downstream flow channel 11334 in the two adjacent main heat exchange flow channels 11331 are configured to be adjacent. Thermal coordination means that the adjacent upstream flow channel 11333 and the downstream flow channel 11334 can conduct heat (or exchange heat). It can also be understood that due to the adjacent configuration of the upstream flow channel 11333 and the downstream flow channel 11334, the area on the heat exchange surface 1134 corresponding to the upstream flow channel 11333 and the area on the heat exchange surface 1134 corresponding to the downstream flow channel 11334 can conduct heat (or exchange heat).

[0147] It can be seen that the thermal conductivity between the upstream flow channel 11333 and the downstream flow channel 11334 is such that the low temperature of the upstream flow channel 11333 balances the high temperature of the downstream flow channel 11334. In other words, the low-temperature region on the heat exchange surface 1134 corresponding to the upstream flow channel 11333 balances the high temperature region on the heat exchange surface 1134 corresponding to the downstream flow channel 11334. This reduces the temperature difference on the heat exchange surface 1134 of the refrigerant heat exchange component 1130. Therefore, the temperature of the region on the heat exchange surface 1134 adjacent to the upstream flow channel 11333 is less likely to rise excessively; instead, the temperature is relatively lower, making it less likely to form an overheated zone and resulting in a more balanced temperature distribution on the heat exchange surface 1134. Thus, the upstream flow channel 11333 and the downstream flow channel 11334 in the two adjacent main heat exchange channels 11331 form a uniform temperature region on the heat exchange surface 1134.

[0148] Combination Figure 17 The temperature distribution diagram of the refrigerant heat exchange channel 11341 clearly shows that the temperature of the downstream channel 11334, which is adjacent to the upstream channel 11333, is significantly balanced. Figure 17 In this context, the larger the number, the higher the temperature; the size of the number reflects the temperature level.

[0149] In this embodiment, the upstream flow channel 11333 and the downstream flow channel 11334 of the two main heat exchange channels 11331 are arranged adjacent to each other. The low temperature of the upstream flow channel 11333 can balance the high temperature of the downstream flow channel 11334, thereby reducing the temperature of the area on the heat exchange surface 1134 corresponding to the downstream flow channel 11334. This makes it less likely for an overheated area to form, thus reducing the area of ​​the overheated area. This is beneficial to improving the heat exchange effect on the battery cell module 1110 and making the temperature distribution on the heat exchange surface 1134 of the refrigerant heat exchange component 1130 more uniform, thereby improving the heat exchange uniformity of the battery cell module 1110.

[0150] In some embodiments, refer to Figure 12 As shown, the battery cell assembly 1110 includes multiple rows of battery cell groups 1111, each row of battery cell groups 1111 including multiple battery cells 1112 stacked in a first direction X, and the multiple rows of battery cell groups 1111 are arranged side by side in a second direction Y; the refrigerant heat exchange component 1130 has a first surface 1135, the first surface 1135 is disposed opposite to the battery cell assembly 1110, and the projection area of ​​each row of battery cell groups 1111 on the first surface 1135 covers at least one main heat exchange channel 11331.

[0151] For the battery cell assembly 1110, the battery cell assembly 1110 includes multiple rows or multiple battery cell groups 1111. The multiple rows of battery cell groups 1111 are arranged side by side in the second direction Y. Each row of battery cell group 1111 includes multiple battery cells 1112. The battery cells 1112 can be cubic or cylindrical. The battery cells 1112 in each row of battery cell group 1111 are all stacked and arranged sequentially along the first direction X. The second direction Y is a direction perpendicular to the first direction X.

[0152] Multiple main heat exchange channels 11331 are arranged at intervals and connected in the second direction Y to form a parallel flow channel structure. It can be seen that multiple main heat exchange channels 11331 and multiple rows of battery cell groups 1111 are arranged in sequence in the second direction Y. Multiple battery cells 1112 in each row of battery cell groups 1111 are arranged in sequence along the extension direction of the main heat exchange channels 11331.

[0153] Since the battery cell assembly 1110 is arranged opposite to the first surface 1135 (specifically the heat exchange surface 1134), it can be known that each row of battery cell groups 1111 forms a projection area on the heat exchange surface 1134, so that the projection area of ​​each row of battery cell groups 1111 on the first surface 1135 covers at least one main heat exchange channel 11331.

[0154] One possible scenario is that the projected area of ​​each row of battery cells 1111 on the first surface 1135 covers a main heat exchange channel 11331. That is, one main heat exchange channel 11331 provides targeted heat exchange for one row of battery cells 1111. Each row of battery cells 1111 will exchange heat through one main heat exchange channel 11331. As long as the structure of each main heat exchange channel 11331 is the same, and the flow rate, pressure and other data of the refrigerant in each main heat exchange channel 11331 are the same, it can be known that the heat exchange capacity of each main heat exchange channel 11331 is the same. Therefore, balanced heat exchange for each row of battery cells 1111 can be achieved.

[0155] In some cases, the projected area of ​​each row of battery cells 1111 on the first surface 1135 may cover one main heat exchange channel 11331 and a portion of an adjacent main heat exchange channel 11331. Alternatively, the projected area of ​​each row of battery cells 1111 on the first surface 1135 may cover multiple main heat exchange channels 11331, thereby enhancing the heat exchange capacity of the main heat exchange channels 11331 for each row of battery cells 1111. To improve the effect of balanced heat exchange, the number of main heat exchange channels 11331 corresponding to each row of battery cells 1111 may be the same, where the number may be a fraction or decimal. For example, the projected area of ​​each row of battery cells 1111 on the first surface 1135 may cover one main heat exchange channel 11331 and half of an adjacent main heat exchange channel 11331.

[0156] In this embodiment, the battery cell assembly 1110 is arranged into multiple rows of battery cell groups 1111, and the extension direction of each main heat exchange channel 11331 is consistent with the arrangement direction of the multiple battery cells 1112 in each row of battery cell groups 1111. This allows the multiple battery cells 1112 in each row of battery cell groups 1111 to have a larger heat exchange area with the main heat exchange channel 11331. Each main heat exchange channel 11331 can more effectively exchange heat with each battery cell group 1111, which is beneficial to improving the effect of balanced heat exchange.

[0157] In some embodiments, the housing assembly 1120 further has a mounting cavity, in which the connector component 1140 is at least partially received.

[0158] Specifically, the enclosure assembly 1120 includes a frame 1123, which can be understood as an annular frame structure formed by the side walls of the enclosure assembly 1120. The refrigerant heat exchange component 1130 may be part of the enclosure assembly 1120; for example, the refrigerant heat exchange component 1130 may serve as the bottom plate of the enclosure assembly 1120. Alternatively, the enclosure assembly 1120 may also include a bottom plate connected to an opening in the frame 1123, with the refrigerant heat exchange component 1130 located inside the enclosure assembly 1120 and arranged opposite to the bottom plate.

[0159] The mounting cavity can be a groove or cavity structure formed on the frame 1123 of the housing assembly 1120. Specifically, the mounting cavity is formed on the side wall of the frame 1123. The mounting cavity can accommodate the connector component 1140, thereby helping to reduce the exposed volume of the connector component 1140 outside the housing. The mounting cavity serves to accommodate the connector component 1140.

[0160] In this embodiment, by providing an installation cavity, the connector component 1140 can be at least partially accommodated, which helps to improve space utilization and reduce the risk of interference between the connector component 1140 and other external components.

[0161] In some embodiments, refer to Figure 14-16 As shown, the refrigerant heat exchange component 1130 has a first surface 1135 and a second surface opposite to each other. The first surface 1135 is disposed opposite to the battery cell assembly 1110. The refrigerant heat exchange component 1130 includes a plurality of mounting holes 1139, which are disposed through the first surface 1135 and the second surface and are disposed to avoid the first flow channel 11311, the second flow channel 11312, the first flow channel 11321, the second flow channel 11322 and the refrigerant heat exchange channel 11341.

[0162] Specifically, the first surface 1135 and the second surface are two opposing surfaces of the refrigerant heat exchange component 1130. The battery cell assembly 1110 can be arranged opposite to the first surface 1135, and the heat exchange surface 1134 is a part of the first surface 1135.

[0163] The main function of the mounting hole 1139 is to facilitate a stable connection between the refrigerant heat exchange component 1130 and other structures within the battery device 1100. For example, by inserting bolts, rivets, or other connectors through the mounting hole 1139, the refrigerant heat exchange component 1130 can be installed at a specific position on the housing assembly 1120 or the vehicle 1000, thereby fixing the refrigerant heat exchange component 1130 and reducing vibration and displacement of the refrigerant heat exchange component 1130 during the operation of the battery device 1100.

[0164] The mounting hole 1139 can be a through-hole structure, forming a connecting hole that penetrates the first surface 1135 and the second surface. The mounting hole 1139 can be arranged in the heat exchange zone 1133. For example, the mounting hole 1139 can be arranged in the middle region of the heat exchange zone 1133 in the first direction XX. The mounting hole 1139 can be located between two heat exchange sub-channels and is not connected to the main heat exchange channel 11331. For example, the main heat exchange channel 11331 can refer to the upstream channel 11333 or the downstream channel 11334. The mounting hole 1139 can be located between two upstream sub-channels 11335 (or direct-flow channel structure) in the upstream channel 11333, or between two downstream sub-channels 11336 in the downstream channel 11334, or between an upstream channel 11333 and a downstream channel 11334.

[0165] The diameter of the mounting hole 1139 can be larger than the interval between two adjacent flow channels. Then, the flow channel can be bent at the position opposite to the mounting hole 1139. That is to say, at the position opposite to the mounting hole 1139, the flow channel is bent, for example, it is bent in a semi-circular shape.

[0166] In this embodiment, by providing mounting holes 1139, it is convenient to connect and fix the refrigerant heat exchange component 1130 to other components using bolts or other locking devices, thereby improving the ease of connection between the refrigerant heat exchange component 1130 and other components.

[0167] In some embodiments, refer to Figure 14-16 As shown, along the first direction X, a plurality of mounting holes 1139 are arranged in the middle region of the refrigerant heat exchange component 1130 and spaced apart along the second direction Y; and / or, along the second direction Y, a plurality of mounting holes 1139 are arranged in the middle region of the refrigerant heat exchange component 1130 and spaced apart along the first direction X; the second direction Y is perpendicular to the first direction X.

[0168] Specifically, both the first direction X and the second direction Y are parallel to the first surface 1135, with the second direction Y perpendicular to the first direction X. In the first direction X, the mounting holes 1139 are arranged in the central area of ​​the refrigerant heat exchange component 1130, which helps to distribute the forces acting on the refrigerant heat exchange component 1130 more evenly during installation and fixing. When the refrigerant heat exchange component 1130 is connected and fixed to other components through these mounting holes 1139, the central location of the mounting points effectively reduces component deformation or damage caused by uneven force distribution, thus improving the mechanical stability of the refrigerant heat exchange component 1130.

[0169] Since the heat exchange sub-channels around the mounting hole 1139 need to form a curved structure for avoidance, in order to improve the structural consistency among multiple main heat exchange channels 11331, the mounting hole 1139 can be set between two adjacent main heat exchange channels 11331, and a curved structure can be formed on each main heat exchange channel 11331, so that the structural form of each main heat exchange channel 11331 is consistent, which is conducive to improving the consistency of refrigerant flow in each main heat exchange channel 11331, thereby improving the temperature uniformity of the heat exchange surface 1134.

[0170] In the second direction Y, multiple mounting holes 1139 can be configured on a straight line parallel to the second direction Y to improve the regularity of the structural layout.

[0171] Optionally, in the second direction Y, the refrigerant heat exchange component 1130 has a central region, and along the second direction Y, a plurality of mounting holes 1139 are arranged in the central region of the refrigerant heat exchange component 1130 and spaced apart along the first direction X. In the first direction X, the plurality of mounting holes 1139 can be configured on a straight line parallel to the first direction X to improve the regularity of the structural layout.

[0172] Optionally, mounting holes 1139 are arranged in both the first direction X and the second direction Y, and the multiple mounting holes 1139 are arranged in a cross shape in the central area of ​​the refrigerant heat exchange component 1130.

[0173] In this embodiment, the multiple mounting holes 1139 are arranged in the middle of the refrigerant heat exchange component 1130 and are evenly distributed at intervals, which helps to improve the balance of force on the refrigerant heat exchange component 1130 and makes the layout between the main heat exchange channel 11331 and the mounting holes 1139 more regular.

[0174] In some embodiments, referring to 5, the refrigerant heat exchange component 1130 also has a plurality of cavities 1138 inside, each cavity 1138 being configured to avoid the first flow channel 11311, the second flow channel 11312, the first flow channel 11321, the second flow channel 11322, and the refrigerant heat exchange channel 11341.

[0175] Cavity 1138 can be understood as the hollow space inside the refrigerant heat exchange component 1130. For example, during the manufacturing process of the refrigerant heat exchange component 1130, the refrigerant heat exchange component 1130 includes an upper plate and a lower plate, which are welded together. During welding, a large amount of gas is generated. If this gas cannot be discharged in time, defects such as pores will form in the weld, reducing the welding quality and the sealing performance of the weld. As a structural cavity, cavity 1138 provides a discharge channel for the gas generated during welding, allowing the gas to escape smoothly, reducing welding defects caused by gas accumulation, thereby ensuring the quality and reliability of the welding, improving the sealing performance of the refrigerant heat exchange component 1130, and reducing the risk of refrigerant leakage.

[0176] Furthermore, by adding multiple cavities 1138 within the space outside the main heat exchange channel 11331, the overall structural strength of the refrigerant heat exchange component 1130 can be improved. The presence of the cavities 1138 alters the overall structure of the refrigerant heat exchange component 1130, giving it better mechanical properties. From a mechanical perspective, the cavities 1138 can serve as a reinforcing structure, effectively improving the bending and compressive strength of the refrigerant heat exchange component 1130. When the refrigerant heat exchange component 1130 is subjected to external forces, the cavities 1138 can disperse stress, reducing stress concentration and enabling the refrigerant heat exchange component 1130 to withstand greater external forces without deformation or damage. This improves the stability and reliability of the entire battery device 1100 and extends its service life.

[0177] Multiple cavities 1138 are disposed at one or both ends of the refrigerant heat exchange component 1130 along the first direction X.

[0178] In this embodiment, by setting multiple cavities 1138, the flow can be guided and the air can be vented during the welding process, which is beneficial to improving the welding quality and welding sealing, and also beneficial to improving the overall structural strength of the refrigerant heat exchange component 1130.

[0179] In some embodiments, refer to Figure 3 As shown, the housing assembly 1120 includes a housing body 1121 with a receiving cavity 1124, and a refrigerant heat exchange component 1130 connected to the housing body 1121 and housed in the receiving cavity 1124; the refrigerant heat exchange component 1130 is disposed opposite to the battery cell assembly 1110.

[0180] Specifically, the housing body 1121 may include a cover 1122, a frame 1123, and a bottom plate. The cover 1122 and the frame 1123 cover each other, and an opening is formed on the side of the frame 1123 opposite to the cover 1122. This can be understood as the cover 1122 and the frame 1123 being connected to form a groove structure with an opening. The bottom plate is opposite to the cover 1122 and covers the opening. The cover 1122, the frame 1123, and the bottom plate together define a receiving cavity 1124 for accommodating the battery cell assembly 1110. The cover 1122 and the bottom plate may both be plate-shaped structures, and the frame 1123 may be a hollow structure with openings at both ends. For example, the frame 1123 may be an annular frame structure. The cover 1122 covers one open side of the frame 1123, and the bottom plate is connected to the other open side (i.e., the open side) of the frame 1123. The cover 1122 may be disposed opposite to the bottom plate. The box body 1121 can be of various shapes, such as cylinder, cuboid, etc.

[0181] The refrigerant heat exchange component 1130 can be connected to the housing body 1121 and housed in the housing cavity 1124 so as to face the bottom plate of the housing. The battery cell assembly 1110 is opposite to the refrigerant heat exchange component 1130, so that it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110.

[0182] In this embodiment, the refrigerant heat exchange component 1130 can be housed in the receiving cavity 1124 and disposed opposite to the battery cell assembly 1110, so that it can exchange heat with the battery cell assembly 1110 while also supporting the battery cell assembly 1110.

[0183] In some embodiments, refer to Figure 2 As shown, the housing assembly 1120 includes a housing body 1121 with an open opening, and a refrigerant heat exchange component 1130 connected to the housing body 1121 and covering the open opening to form a receiving cavity 1124; the refrigerant heat exchange component 1130 is disposed opposite to the battery cell assembly 1110.

[0184] Specifically, the housing body 1121 may include a cover 1122 and a frame 1123, which cover each other. An open opening is formed on the side of the frame 1123 opposite to the cover 1122. This can be understood as the cover 1122 and the frame 1123 being connected to form a groove structure with an open opening. The cover 1122, the frame 1123, and the refrigerant heat exchange component 1130 together define a receiving cavity 1124 for accommodating the battery cell assembly 1110. The cover 1122 may be a plate-like structure, and the frame 1123 may be a hollow structure with openings at both ends. For example, the frame 1123 may be an annular frame structure. The cover 1122 covers one open side of the frame 1123, and the refrigerant heat exchange component 1130 is connected to the other open side (i.e., the open opening) of the frame 1123. The cover 1122 may be disposed opposite to the refrigerant heat exchange component 1130. The box body 1121 can be of various shapes, such as cylinder, cuboid, etc.

[0185] The refrigerant heat exchange component 1130 can be connected to the housing body 1121. The refrigerant heat exchange component 1130 can form the bottom plate of the housing opposite to the battery cell assembly 1110. In this way, it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110. This helps to simplify the structure of the external housing body 1121 and reduce the weight of the battery device 1100.

[0186] In this embodiment, the refrigerant heat exchange component 1130 can be connected to the box body 1121. The refrigerant heat exchange component 1130 can form the bottom plate of the box, so that it can exchange heat with the battery cell assembly 1110 and also support the battery cell assembly 1110. This helps to simplify the structure of the external box body 1121 and reduce the weight of the battery device 1100.

[0187] In some embodiments, the main heat exchange channel 11331 is filled with a phase change medium.

[0188] Specifically, a phase change medium is a substance capable of undergoing a phase change at a specific temperature, absorbing or releasing a large amount of latent heat during the phase change process. In this example, a phase change medium is used as the heat exchange medium. When the battery cell assembly 1110 generates a large amount of heat during charging and discharging, the phase change medium in the main heat exchange channel 11331 absorbs the heat and undergoes a phase change, slowing down the rapid temperature rise of the battery device 1100. When the temperature of the battery device 1100 decreases, the phase change medium releases heat, mitigating the impact of excessively low battery temperature on performance. Using a phase change medium as the heat exchange medium helps maintain a relatively stable temperature for the battery device 1100, reducing problems such as capacity decay and shortened lifespan due to excessively high temperatures, or increased internal resistance and reduced charging and discharging efficiency due to excessively low temperatures, thereby improving the overall performance, reliability, and stability of the battery device 1100.

[0189] It should be noted that the phase change medium and the refrigerant can work together. For example, in a large-scale battery energy storage system, the refrigerant is responsible for transferring the heat generated by the battery cell module 1110 from the battery module to the heat dissipation end of the entire thermal management system, while the phase change medium is placed inside the battery module. When the battery cell module 1110 generates a large amount of heat in a short period of time, the phase change medium quickly absorbs the heat and undergoes a phase change, mitigating the rapid temperature rise and buying time for the refrigerant to further dissipate heat. The two work together to improve the efficiency and stability of the thermal management system.

[0190] In this embodiment, filling the main heat exchange channel 11331 with a phase change medium is beneficial to improving heat exchange efficiency and enhancing the performance stability of the battery device 1100.

[0191] In some embodiments, the refrigerant heat exchange component 1130 is formed from one or more of metals and non-metals.

[0192] Specifically, metallic materials, such as copper and aluminum, possess excellent thermal conductivity, enabling rapid heat transfer and allowing the refrigerant heat exchange component 1130 to efficiently dissipate the heat generated by the battery cell assembly 1110. Non-metallic materials, like ceramics, offer unique thermal performance advantages; for example, some ceramic materials exhibit high-temperature resistance, maintaining stable thermal conductivity even under high-temperature environments. Combining metallic and non-metallic materials fully leverages their respective thermal conductivity advantages, ensuring the refrigerant heat exchange component 1130 maintains high-efficiency thermal conductivity across different operating temperature ranges and heat load conditions, thereby enhancing the overall performance of the battery thermal management system.

[0193] In this embodiment, the material selection of the refrigerant heat exchange component 1130 is more flexible and varied, and it can be flexibly combined and prepared according to the heat exchange requirements of the battery device 1100, so that the refrigerant heat exchange component 1130 can maintain efficient heat conduction capability and improve the overall performance of the battery thermal management system.

[0194] According to some embodiments of this application, refer to Figure 4 As shown, this application also provides a refrigerant heat exchange device, which includes the refrigerant heat exchange component 1130 in the battery device 1100 in any of the above embodiments.

[0195] The example of the refrigerant heat exchange device in this application is based on the example of the battery device 1100 described above. The structure of the refrigerant heat exchange component 1130 in the example of the battery device 1100 is the same as that of the refrigerant heat exchange component 1130 in this example, and the technical effects are the same. It will not be described again here. For details, please refer to the description of the battery device 1100 described above.

[0196] According to some embodiments of this application, this application also provides an energy storage device, which includes a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0197] Specifically, the energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices 1100, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0198] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0199] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0200] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0201] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0202] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the individual battery cells 1112.

[0203] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0204] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0205] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0206] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0207] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and an energy storage device as described in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0208] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, hydroelectric power generation device, thermal power generation device, wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0209] According to some embodiments of this application, refer to Figure 1 As shown, this application also provides an electrical device, which includes the battery device 1100 in the above embodiments, the energy storage device in the above embodiments, or the energy storage system in the above embodiments. The battery device 1100 is used to store or provide electrical energy.

[0210] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 1112, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0211] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0212] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0213] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery unit 1100 in the energy storage devices via cables. The battery unit 1100 can provide its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000) to replenish their power.

[0214] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0215] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device (1100) characterized by, include: The housing assembly (1120) has a receiving cavity (1124); A battery cell assembly (1110) is housed within the receiving cavity (1124); A refrigerant heat exchange component (1130) is configured to exchange heat with the battery cell assembly (1110). The refrigerant heat exchange component (1130) includes an inlet / outlet area (1131), a main branch / collector area (1132), and a heat exchange area (1133). The main branch / collector area (1132) is arranged between the inlet / outlet area (1131) and the heat exchange area (1133). The inlet / outlet area (1131) has a first flow channel (11311) and a second flow channel (11312) both used for the flow of refrigerant. The flow direction of the refrigerant in the first flow channel (11311) is the same as that in the second flow channel (11312). The refrigerant flows in opposite directions; the main distribution and collection area (1132) includes at least one first flow channel (11321) and at least two second flow channels (11322), all of the first flow channels (11321) are distributed among all of the second flow channels (11322), the heat exchange area (1133) includes a refrigerant heat exchange flow channel (11341), the first flow channel (11311) is connected to the refrigerant heat exchange flow channel (11341) through the corresponding first flow channel (11321), and the second flow channel (11312) is connected to the refrigerant heat exchange flow channel (11341) through the corresponding second flow channel (11322); The connector component (1140) is connected to the refrigerant heat exchange component (1130) and communicates with the first flow channel (11311) and the second flow channel (11312).

2. The battery device (1100) of claim 1, wherein, The number of the second flow channels (11322) is even, and all the second flow channels (11322) are symmetrically arranged on both sides of all the first flow channels (11321).

3. The battery apparatus (1100) of claim 1, wherein, The first flow channel (11321) includes a first branch channel (11323) and a plurality of second branch channels (11324). The first branch channel (11323) is connected to the plurality of second branch channels (11324). The first branch channel (11323) extends along a second direction (Y), and each of the second branch channels (11324) extends along a first direction (X). The end of the first branch channel (11323) away from the second branch channel (11324) is connected to the first flow channel (11311), and the end of each of the second branch channels (11324) away from the first branch channel (11323) is connected to the refrigerant heat exchange channel (11341) in the heat exchange zone (1133). The second direction (Y) is perpendicular to the first direction (X).

4. The battery apparatus (1100) of claim 1, wherein, There is at least one first flow channel (11311) and at least two second flow channels (11312), and all the first flow channels (11311) are distributed among all the second flow channels (11312).

5. The battery device (1100) as claimed in claim 1, characterized in that, Both the first flow channel (11311) and the second flow channel (11312) extend along the first direction (X).

6. The battery device (1100) as claimed in claim 3, characterized in that, The heat exchange zone (1133) includes two guide channels (11332) and multiple main heat exchange channels (11331). The multiple main heat exchange channels (11331) are arranged in parallel along the second direction (Y). Along the second direction (Y), each main heat exchange channel (11331) is distributed between two guide channels (11332). Along the first direction (X), each main heat exchange channel (11331) has a connection end arranged far apart. Each second branch channel (11324) is correspondingly connected to one connection end of each main heat exchange channel (11331). One end of each guide channel (11332) is correspondingly connected to the other connection end of a portion of the main heat exchange channels (11331), and the other end of each guide channel (11332) is correspondingly connected to each second channel (11322).

7. The battery device (1100) as claimed in claim 6, characterized in that, The main flow distribution area (1132) and the heat exchange area (1133) form a boundary region (11337) at their intersection, and the boundary region (11337) extends along the second direction (Y). A first node (11338) is formed at the position where each of the second flow channels (11324) connects with each of the main heat exchange channels (11331), and a second node (11339) is formed at the position where the guide channel (11332) connects with the second channel (11322). Both the first node (11338) and the second node (11339) are distributed in the boundary region (11337).

8. The battery device (1100) as claimed in claim 6, characterized in that, Each of the main heat exchange channels (11331) includes an upstream channel (11333) and a downstream channel (11334) extending along a first direction (X) and spaced apart in a second direction (Y). The upstream channel (11333) and the downstream channel (11334) are connected at one end away from the inlet / outlet area (1131). The guide channel (11332) is connected to the downstream channel (11334), and the second branch channel (11324) is connected to the upstream channel (11333).

9. The battery device (1100) as claimed in claim 8, characterized in that, The upstream channel (11333) includes a plurality of upstream sub-channels (11335) extending along a first direction (X) and spaced apart in a second direction (Y), and the upstream sub-channels (11335) are interconnected; and / or, the downstream channel (11334) includes a plurality of downstream sub-channels (11336) extending along the first direction (X) and spaced apart in a second direction (Y), and the downstream sub-channels (11336) are interconnected.

10. The battery device (1100) as claimed in claim 8, characterized in that, The upstream flow channel (11333) in a portion of the main heat exchange flow channel (11331) is adjacent to and thermally connected to the downstream flow channel (11334) in the adjacent main heat exchange flow channel (11331), and the downstream flow channel (11334) in a portion of the main heat exchange flow channel (11331) is adjacent to and thermally connected to the upstream flow channel (11333) in the adjacent main heat exchange flow channel (11331).

11. The battery device (1100) as claimed in claim 6, characterized in that, The battery cell assembly (1110) includes multiple rows of battery cell groups (1111), each row of battery cell groups (1111) includes multiple battery cells (1112) stacked in a first direction (X), and the multiple rows of battery cell groups (1111) are arranged side by side in a second direction (Y); the refrigerant heat exchange component (1130) has a first surface (1135), the first surface (1135) is arranged opposite to the battery cell assembly (1110), and the projection area of ​​each row of battery cell groups (1111) on the first surface (1135) covers at least one of the main heat exchange channels (11331).

12. The battery device (1100) according to any one of claims 1-5, characterized in that, The housing assembly (1120) also has a mounting cavity, and the connector component (1140) is at least partially housed within the mounting cavity.

13. The battery device (1100) according to any one of claims 1-5, characterized in that, The refrigerant heat exchange component (1130) has a first surface (1135) and a second surface opposite to each other, the first surface (1135) being disposed opposite to the battery cell assembly (1110); the refrigerant heat exchange component (1130) includes a plurality of mounting holes (1139), the plurality of mounting holes (1139) being disposed through between the first surface (1135) and the second surface and avoiding the first flow channel (11311), the second flow channel (11312), the first flow channel (11321), the second flow channel (11322) and the refrigerant heat exchange channel (11341).

14. The battery device (1100) as claimed in claim 13, characterized in that, Along the first direction (X), a plurality of mounting holes (1139) are arranged in the central region of the refrigerant heat exchange component (1130) and spaced apart along the second direction (Y); and / or, along the second direction (Y), a plurality of mounting holes (1139) are arranged in the central region of the refrigerant heat exchange component (1130) and spaced apart along the first direction (X); the second direction (Y) is perpendicular to the first direction (X).

15. The battery device (1100) according to any one of claims 1-5, characterized in that, The refrigerant heat exchange component (1130) also has a plurality of cavities (1138) inside, each of which is configured to avoid the first flow channel (11311), the second flow channel (11312), the first flow channel (11321), the second flow channel (11322) and the refrigerant heat exchange channel (11341).

16. A refrigerant heat exchange device, characterized in that, The refrigerant heat exchange device includes the refrigerant heat exchange component (1130) in the battery device (1100) as described in any one of claims 1-15.

17. An electrical device, characterized in that, Includes a battery device (1100) as described in any one of claims 1-15, the battery device (1100) being used to store or provide electrical energy.

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