Battery devices, refrigerant heat exchangers and electrical appliances

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, battery cell assemblies, and a refrigerant heat exchange component. The housing assembly has a receiving cavity; the battery cell assemblies are housed within the receiving cavity. The refrigerant heat exchange component includes an inlet / outlet area, a main branch flow collection area, and a heat exchange area, each with internal refrigerant flow channels. The main branch flow collection area is located between the inlet / outlet area and the heat exchange area, and the refrigerant flow channels within the main branch flow collection area connect the inlet / outlet area and the refrigerant flow channels within the main branch flow collection area. The inlet / outlet area is configured to introduce or export refrigerant into the refrigerant flow channels. The heat exchange area coincides with the projection of the battery cell assembly onto the refrigerant heat exchange component, and the refrigerant flow channels within the heat exchange area are configured to exchange heat with the battery cell assembly. The main branch flow collection area and the inlet / outlet area are both configured not to coincide with the projection of the battery cell assembly onto the refrigerant heat exchange component. This application aims to improve the temperature uniformity 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] In related technologies, the internal flow channel layout of heat exchange components is chaotic, with functional areas with heat exchange capacity interspersed with non-functional areas with low heat exchange capacity. This affects the temperature uniformity of the heat exchange components themselves, resulting in uneven temperature distribution. Consequently, it affects the balanced heat exchange of the heat exchange components to the battery cells, and thus affects the performance and lifespan of the battery device. Utility Model Content

[0005] The purpose of this application is to provide a battery device, a refrigerant heat exchange device, and an electrical device, which aims 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] The refrigerant heat exchange component includes an inlet / outlet area, a main branch / collector area, and a heat exchange area, each with internal refrigerant flow channels. The main branch / collector area is located between the inlet / outlet area and the heat exchange area. The refrigerant flow channels within the main branch / collector area connect the inlet / outlet area and the refrigerant flow channels within the main branch / collector area. The inlet / outlet area is configured to introduce or export refrigerant into the refrigerant flow channels. The heat exchange area coincides with the projection of the battery cell module on the refrigerant heat exchange component, and the refrigerant flow channels within the heat exchange area are configured to exchange heat with the battery cell module. Both the main branch / collector area and the inlet / outlet area are configured not to coincide with the projection of the battery cell module on the refrigerant heat exchange component.

[0010] In this embodiment, the heat exchange zones with high heat exchange capacity are separated from the main diversion and collection zones and the inlet and outlet zones. The refrigerant channels in the main diversion and collection zones and the inlet and outlet zones are not allowed to enter the refrigerant channel area of ​​the heat exchange zone. This makes the distribution of refrigerant channels in the heat exchange zone more concentrated and the layout path of the refrigerant channels simpler, which is conducive to making the temperature distribution in the heat exchange zone more uniform. The heat exchange zone is configured to be opposite to the battery cell assembly and to exchange heat with the battery cell assembly, thereby improving the ability of the refrigerant heat exchange component to balance the heat exchange of the battery cell assembly.

[0011] In one embodiment, the heat exchange zone includes a direct current zone and a commutation zone. The refrigerant channels in the direct current zone are configured as multiple direct current channel structures spaced apart in a second direction, and each direct current channel structure extends along a first direction. The refrigerant channels in the commutation zone are configured as bent channel structures, and the bent channel structures are connected to the direct current channel structures. The second direction is perpendicular to the first direction. The battery cell assembly is disposed opposite to the direct current zone, or the battery cell assembly is disposed opposite to both the direct current zone and the commutation zone.

[0012] In this embodiment, the arrangement of the DC channel structure and the bent flow channel structure creates a DC zone and a commutation zone on the heat exchange zone. The temperature distribution in the DC zone is more uniform, and when the DC zone exchanges heat with the battery cell module, it is more conducive to improving the balanced heat exchange of the battery cell module.

[0013] In one embodiment, the battery cell assembly includes a plurality of battery cell groups arranged in a second direction, each battery cell group including a plurality of battery cells stacked along a first direction.

[0014] In this embodiment, in the second direction, the battery cell group can cover a larger number of DC channel structures, and in the first direction, the battery cell group can cover a longer DC channel structure, which is beneficial to increase the corresponding area of ​​the battery cell assembly and the DC region, increase the heat exchange area, and thus improve the heat exchange efficiency.

[0015] In one embodiment, the direct current channel structure has a first length in a first direction, and the bent channel structure has a second length in the first direction, the ratio of the second length to the first length being less than 0.1.

[0016] In this embodiment, the ratio of the first length of the bent flow channel structure to the second length of the direct flow channel structure is less than 0.1, thereby controlling the extension length of the bent flow channel structure. This helps to increase the extension length of the direct flow channel structure, as well as the length and area of ​​the direct flow zone, which in turn helps to improve the heat exchange efficiency.

[0017] In one embodiment, the commutation zone is located at the edge of the heat exchange zone, and / or the commutation zone is located between the DC zone and the main shunt collector zone.

[0018] In this embodiment, by setting the commutation zone at the edge of the heat exchange zone or between the DC zone and the main current collection zone, it can correspond to the battery cells at the edge, thereby improving the effect of balanced heat dissipation.

[0019] In one embodiment, the commutation region further includes a sub-shunt-and-combine structure, which connects the partially bent flow channel structure and the partially direct flow channel structure.

[0020] In this embodiment, by adding a sub-flow branching and merging structure, it is convenient for the flow channels used for return flow in the DC channel structure to be connected and merged with each other, which facilitates the directional guidance and merging of the return refrigerant.

[0021] In one embodiment, the heat exchange zone has a third length in a first direction, and the refrigerant heat exchange component has a fourth length in the first direction, wherein the ratio of the third length to the fourth length is greater than or equal to 0.6 and less than 1.

[0022] In this embodiment, by controlling the proportion of the heat exchange zone on the refrigerant heat exchange component to be greater than or equal to 0.6 and less than 1, it is beneficial to make the heat exchange zone occupy a larger proportion in the refrigerant heat exchange component, which is beneficial to ensure that there is sufficient contact area between the battery cell assembly and the refrigerant heat exchange component for heat exchange, thereby improving the heat exchange efficiency.

[0023] In one embodiment, the heat exchange zone has a heat exchange surface opposite to the battery cell assembly, and the refrigerant flow channel in the heat exchange zone is configured to be opposite to the heat exchange surface; the ratio of the projected area of ​​the refrigerant flow channel in the heat exchange zone on the heat exchange surface to the area of ​​the heat exchange surface is greater than or equal to 0.4 and less than or equal to 0.8.

[0024] In this embodiment, by reasonably controlling the projected area ratio of the refrigerant flow channel on the surface of the heat exchange zone, it is possible to ensure that there is sufficient heat exchange area between the refrigerant and the battery cell, reduce the risk of the refrigerant flow channel being too dense or too sparse, optimize the heat exchange effect, and facilitate the design and manufacturing of the refrigerant flow channel.

[0025] In one embodiment, along the second direction, the spacing between two adjacent DC channel structures ranges from 5mm to 15mm.

[0026] In this embodiment, the 5mm-15mm spacing allows for sufficient flow space of the refrigerant between the DC channel structures, while also enabling effective heat exchange between adjacent DC channel structures and individual battery cells. This reduces the risk of insufficient heat exchange due to excessive spacing or excessive flow resistance due to insufficient spacing.

[0027] In one embodiment, the width of the refrigerant channel ranges from 6mm to 15mm.

[0028] In this embodiment, a flow channel width of 6mm-15mm can control the refrigerant's flow rate, flow rate, flow resistance, and pressure drop, ensuring good flow of the refrigerant within the refrigerant flow channel. This not only improves heat exchange efficiency but also avoids increasing costs or affecting thermal management performance due to excessively wide or narrow refrigerant flow channels.

[0029] In one embodiment, the refrigerant heat exchange component also has multiple cavities inside, each of which is not connected to the refrigerant flow channel.

[0030] 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.

[0031] In one embodiment, the refrigerant heat exchange component also has multiple mounting holes, which are distributed in the heat exchange area and avoid the refrigerant flow channel.

[0032] 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.

[0033] In one embodiment, the inlet / outlet area, the main branching and collecting area, and the heat exchange area are arranged sequentially in a first direction. The refrigerant flow channels in the inlet / outlet area include a first flow channel and a second flow channel, and the flow direction of the refrigerant in the first flow channel is opposite to that in the second flow channel. The refrigerant flow channels in the main branching and collecting area include a first flow channel and a second flow channel, and the refrigerant flow channels in the heat exchange area include an upstream flow channel and a downstream flow channel that are connected. The first flow channel, the first flow channel, and the upstream flow channel are connected in sequence, and the second flow channel, the second flow channel, and the downstream flow channel are connected in sequence.

[0034] In this embodiment, the arrangement of the inlet and outlet area, the main diversion and collection area, and the heat exchange area is more regular, and the battery cell assembly is set opposite to the heat exchange area, thereby enabling targeted centralized heat exchange and improving the uniformity of heat exchange.

[0035] In one embodiment, the refrigerant flow channel in the heat exchange zone includes multiple heat exchange sub-channels arranged in parallel. Each heat exchange sub-channel includes an upstream flow channel and a downstream flow channel. The upstream flow channel in some heat exchange sub-channels is adjacent to and thermally compatible with the downstream flow channel in the adjacent heat exchange sub-channel, and the downstream flow channel in some heat exchange sub-channels is adjacent to and thermally compatible with the upstream flow channel in the adjacent heat exchange sub-channel.

[0036] In this embodiment, the upstream and downstream channels of the two heat exchange sub-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.

[0037] In one embodiment, a plurality of heat exchange sub-channels are arranged sequentially along a second direction, and the upstream and downstream channels of the heat exchange sub-channels are both extended along a first direction, with the second direction being perpendicular to the first direction.

[0038] In this embodiment, the upstream and downstream flow channels are extended and arranged adjacently in the first direction X, which is beneficial to increasing the length of the adjacent area between the upstream and downstream flow channels, increasing the area of ​​adjacent heat exchange, and increasing the efficiency of heat exchange.

[0039] In one embodiment, at least one first flow channel is provided, and multiple second flow channels are provided, with all the first flow channels distributed between two adjacent second flow channels.

[0040] In this embodiment, all the first flow channels are centrally arranged between the two second flow channels, which reduces the installation space and complexity, and facilitates the centralized delivery of refrigerant. The centralized and compact flow channel layout is convenient for [the following text is incomplete and likely refers to a different embodiment: "and".]

[0041] In one embodiment, the refrigerant in the first flow channel flows in the direction of entry into the main distribution and collection area.

[0042] In this embodiment, the above design is beneficial to arrange the refrigerant in the inflow direction in the middle region of the refrigerant heat exchange component, which is beneficial to increase the flow rate of the refrigerant when it flows in and improve the heat exchange efficiency.

[0043] In one embodiment, the housing assembly includes a housing body with an open opening, a refrigerant heat exchange component connected to the housing body and covering the open opening to form a receiving cavity; the refrigerant heat exchange component is disposed opposite to the battery cell assembly.

[0044] In this embodiment, the refrigerant heat exchange component can be connected to the box body and can form the box bottom plate, so that it can exchange heat with the battery cell assembly while also supporting the battery cell assembly, which helps to simplify the structure of the external box body and reduce the weight of the battery device.

[0045] 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.

[0046] 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.

[0047] 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

[0048] 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.

[0049] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0050] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0051] Figure 3 An exploded view of the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0052] Figure 4 A schematic diagram of the distribution structure of the refrigerant flow channels inside the refrigerant heat exchange component in a battery device provided in some embodiments of this application;

[0053] Figure 5 Schematic diagram of the distribution structure of refrigerant flow channels in the heat exchange zone of the refrigerant heat exchange component provided in some embodiments of this application Figure 1 ;

[0054] Figure 6 Schematic diagram of the distribution structure of refrigerant flow channels in the heat exchange zone of the refrigerant heat exchange component provided in some embodiments of this application Figure 2 ;

[0055] Figure 7 The relative positional relationship between the refrigerant flow channel and the battery cell assembly in the refrigerant heat exchange component of the battery device provided in some embodiments of this application. Figure 1 ;

[0056] Figure 8 The relative positional relationship between the refrigerant flow channel and the battery cell assembly in the refrigerant heat exchange component of the battery device provided in some embodiments of this application. Figure 2 ;

[0057] Figure 9 This is a schematic diagram of the structure of a refrigerant heat exchange component provided in some embodiments of this application, showing the corresponding distribution of the heat exchange surface and the first surface.

[0058] Figure 10 A schematic diagram showing the distribution area of ​​the refrigerant flow channels in the heat exchange zone of a refrigerant heat exchange component provided in some embodiments of this application;

[0059] Figure 11 A schematic diagram of the distribution structure of the refrigerant flow channels in the main distribution and collection area of ​​the refrigerant heat exchange component provided in some embodiments of this application;

[0060] Figure 12 Schematic diagram of the distribution structure of refrigerant flow channels in the inlet and outlet areas of the refrigerant heat exchange component provided in some embodiments of this application. Figure 1 ;

[0061] Figure 13 Schematic diagram of the distribution structure of refrigerant flow channels in the inlet and outlet areas of the refrigerant heat exchange component provided in some embodiments of this application. Figure 2 ;

[0062] Figure 14 This is a schematic diagram of the distribution of mounting holes on a refrigerant heat exchange component provided in some embodiments of this application;

[0063] Figure 15 This is a schematic diagram of the temperature distribution of the refrigerant flow channel in the refrigerant heat exchange component of the battery device provided in some embodiments of this application.

[0064] Explanation of reference numerals in the attached figures:

[0065] 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 Components; 1131, Inlet / Outlet Area; 11311, First Flow Channel; 11312, Second Flow Channel; 1132, Main Diverter / Collector Area; 11321, First Flow Channel; 11322, Second Flow Channel; 11323, First Diverter Channel; 11324, Second Diverter Channel; 1133, Heat Exchange Area; 11331, Direct Current Area; 11332, Reversing Area; 1333, Direct current channel structure; 11334, Bent channel structure; 11335, Sub-channel / combination structure; 11336, Heat exchange sub-channel; 11337, Upstream channel; 11338, Downstream channel; 11339, Heat exchange surface; 1134, Refrigerant channel; 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; L1, First length; L2, Second length; L3, Third length; L4, Fourth length; L5, Spacing distance; L6, Width of refrigerant channel. Detailed Implementation

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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).

[0072] 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.

[0073] 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.

[0074] In recent years, new energy vehicles have experienced rapid development, and their market share is increasing. The urgent problem to be solved in the new energy vehicle industry is to quickly and efficiently achieve energy replenishment.

[0075] 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 refrigerant heat exchange components that can exchange heat between individual battery cells to cool down the individual battery cells.

[0076] Fast charging is a mainstream solution for rapidly replenishing energy in new energy vehicles. However, its implementation faces numerous challenges. During fast charging, individual battery cells generate a significant amount of heat, which can easily cause a rapid rise in the internal temperature of the battery pack. In fast charging, uneven heat exchange between the refrigerant heat exchange components and the individual battery cells is more likely to occur, leading to a sharp increase in the temperature of some cells and the accumulation of large amounts of heat inside the battery pack. This can affect the battery's performance and lifespan, and even pose significant safety hazards during use. Therefore, ensuring balanced heat dissipation, rapid heat exchange, and improving the consistency of temperature distribution within the battery pack have become bottlenecks in battery thermal management.

[0077] Specifically, battery devices generate heat during charging and discharging. If this heat cannot be effectively dissipated, it may lead to a decline in battery performance and a shortened lifespan. High temperatures can accelerate internal chemical reactions within the battery device, increase internal resistance, reduce energy density, and in severe cases, may cause thermal runaway. Therefore, refrigerant heat exchange components are installed in battery devices to cool the individual battery cells.

[0078] Regarding the issue of uneven temperature distribution and localized high temperatures within battery devices, research has revealed that refrigerant heat exchange components employing refrigerant heat exchange typically contain numerous refrigerant channels. These channels form functional and non-functional zones. The channels within the functional zones possess high heat exchange capacity and are the primary heat exchange channels. Conversely, the channels within the non-functional zones have lower heat exchange capacity; for example, the channels at the inlet and outlet are non-functional channels, as are those primarily used for guiding and distributing flow. However, in related technologies, the channel layout within refrigerant heat exchange components is often chaotic, with channels in the high-capacity functional zones intermingling with those in the low-capacity non-functional zones. This disrupts the temperature uniformity of the heat exchange component, leading to uneven temperature distribution and hindering balanced heat exchange between the component and individual battery cells. Consequently, this negatively impacts the performance and lifespan of the battery device.

[0079] Specifically, in related technologies, for example, when a diversion channel, primarily used for flow diversion, is interspersed between heat exchange channels, the diversion channel inevitably occupies a certain amount of space and area within the functional area corresponding to the heat exchange channel. This results in the functional area of ​​the heat exchange channel being fragmented, meaning that non-functional areas are interspersed within the functional areas of the refrigerant heat exchange component, leading to a scattered distribution of functional areas. For the refrigerant heat exchange component itself, the complex flow path of the refrigerant within the intersecting diversion and heat exchange channels increases pressure loss, reducing refrigerant circulation efficiency. Furthermore, the overlapping and disordered distribution of high- and low-temperature regions results in uneven temperature distribution on the refrigerant heat exchange component, affecting the balanced heat exchange of the battery cells and consequently impacting the performance and lifespan of the battery device.

[0080] Therefore, this application provides a battery device that divides the refrigerant heat exchange component into an inlet / outlet area, a main flow distribution area, and a heat exchange area, with the main flow distribution area located between the inlet / outlet area and the heat exchange area. This separates the heat exchange area, which has a higher heat exchange capacity, from the main flow distribution area and the inlet / outlet area. The refrigerant channels in the main flow distribution area and the inlet / outlet area are not allowed to enter the refrigerant channel area of ​​the heat exchange area, making the refrigerant channel distribution in the heat exchange area more concentrated and the layout path of the refrigerant channels simpler, which is conducive to making the temperature distribution in the heat exchange area more uniform. The heat exchange area is configured to be opposite to the battery cell assembly and to exchange heat with the battery cell assembly, thereby improving the ability of the refrigerant heat exchange component to evenly exchange heat with the battery cell assembly.

[0081] Specifically, refer to Figure 2 As shown, this application provides a battery apparatus 1100, which may include one or more battery cell assemblies 1110 for providing voltage and capacity. Each battery cell assembly may include multiple battery cells 1112, which are connected in series, parallel, or mixed connections via a busbar. The battery apparatus 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.

[0082] 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, 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] Please refer to Figure 2 As shown, Figure 2This 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 1110 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.

[0087] 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.

[0088] According to some embodiments of this application, refer to Figure 2-7 As shown, this application provides a battery device 1100, which includes a housing assembly 1120, a battery cell assembly 1110, and a refrigerant heat exchange component 1130. 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 includes an inlet / outlet area 1131, a main flow distribution and collection area 1132, and a heat exchange area 1133, all with internal refrigerant flow channels 1134. The main flow distribution and collection area 1132 is located between the inlet / outlet area 1131 and the heat exchange area 1133. The refrigerant flow channel 1134 in 132 connects the refrigerant flow channel 1134 in the inlet / outlet area 1131 and the main branch flow collection area 1132; the inlet / outlet area 1131 is configured to introduce or export refrigerant into the refrigerant flow channel 1134; the heat exchange area 1133 coincides with the projection of the battery cell assembly 1110 on the refrigerant heat exchange component 1130, and the refrigerant flow channel 1134 in the heat exchange area 1133 is configured to exchange heat with the battery cell assembly 1110; both the main branch flow collection area 1132 and the inlet / outlet area 1131 are configured not to coincide with the projection of the battery cell assembly 1110 on the refrigerant heat exchange component 1130.

[0089] Specifically, refer to Figure 2 and Figure 7As shown, 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 11339 that is close to or in contact with the surface of the battery cell 1112 will be formed on the refrigerant heat exchange component 1130.

[0090] The surface of the battery cell 1112 that is close to or in contact with the heat exchange surface 11339 can be the bottom surface or the side surface of the battery cell 1112. Taking the battery device 1100 as a horizontally placed example, the surface below the battery cell 1112 is the bottom surface, and the surface of the battery cell 1112 along the vertical direction is the side surface. In this embodiment, the heat exchange surface 11339 of the refrigerant heat exchange component 1130 can be in contact with or close to the bottom surface or the side 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 or at the side 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.

[0091] 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.

[0092] For refrigerant heat exchange component 1130, refer to Figure 4 As shown, the refrigerant heat exchange component 1130 may include at least three parts, namely, the inlet and outlet area 1131, the main branch and collection area 1132, and the heat exchange area 1133. Refrigerant flow channels 1134 are distributed in the inlet and outlet area 1131, the main branch and collection area 1132, and the heat exchange area 1133, and the refrigerant flow channels 1134 are used for the flow of refrigerant.

[0093] The refrigerant flow channels 1134 within the inlet / outlet area 1131 serve to allow refrigerant to flow in and out. It is understood that the inlet / outlet area 1131 has at least two refrigerant flow channels 1134: one for refrigerant inflow and one for refrigerant outflow. The inlet / outlet area 1131 is configured so that its projection onto the refrigerant heat exchange component 1130 does not coincide with the projection of the battery cell assembly 1110. This non-coincidence means that, in the direction of projection, the refrigerant flow channels 1134 within the inlet / outlet area 1131 are arranged to avoid direct contact with the battery cell assembly 1110; that is, the battery cell assembly 1110 is not opposite the refrigerant flow channels 1134 within the inlet / outlet area 1131.

[0094] The refrigerant channels 1134 in the main distribution and collection area 1132 serve to distribute and merge refrigerant. It is understood that the main distribution and collection area 1132 includes multiple refrigerant channels 1134. A portion of these channels is used for distribution, and these distributed channels can connect with the refrigerant channels 1134 in the inlet / outlet area 1131 used for refrigerant inflow. The other refrigerant channels 1134 in the main distribution and collection area 1132 are used for merging, and these merging channels can connect with the refrigerant channels 1134 in the inlet / outlet area 1131 used for refrigerant outflow. The main flow distribution area 1132 is configured so that its projection on the refrigerant heat exchange component 1130 does not coincide with that of the battery cell assembly 1110. This non-coincidence can be understood as the refrigerant flow channel 1134 in the main flow distribution area 1132 being arranged to avoid the battery cell assembly 1110 in the direction of projection. In other words, the battery cell assembly 1110 is not opposite to the refrigerant flow channel 1134 in the main flow distribution area 1132.

[0095] For the heat exchange zone 1133, the heat exchange zone 1133 is mainly used for heat exchange with the battery cell assembly 1110. Therefore, the heat exchange zone 1133 needs to be set opposite to the battery cell assembly 1110. That is to say, the projection of the heat exchange zone 1133 and the battery cell assembly 1110 on the refrigerant heat exchange component 1130 needs to coincide. The refrigerant flow channel 1134 in the heat exchange zone 1133 is configured to exchange heat with the battery cell assembly 1110.

[0096] For refrigerant flow channel 1134, refer to Figure 4As shown, the refrigerant flow channel 1134 can be a hole structure inside the refrigerant heat exchange component 1130. For example, the refrigerant heat exchange component 1130 is plate-shaped, and a through hole structure or cavity structure with a certain extension length and extension path is opened in the plate of the refrigerant heat exchange component 1130. The through hole structure or cavity structure forms the refrigerant flow channel 1134. The refrigerant heat exchange component 1130 can be integrally molded, and the refrigerant flow channel 1134 can be manufactured using gas-assisted or water-assisted molding methods; 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 preset extension length and shape is formed on the second sub-component 1137. The groove structure can be manufactured using 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 flow channel 1134. The refrigerant flow channel 1134 in the heat exchange zone 1133 should be located close to the heat exchange surface 11339, and the extension path of the refrigerant flow channel 1134 can be parallel to the heat exchange surface 11339 to increase the heat exchange effect.

[0097] 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 channel 1134 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.

[0098] Generally, the inlet / outlet area 1131 and the main distribution and collection area 1132 can be collectively referred to as the non-functional area, while the heat exchange area 1133 can be referred to as the functional area. The functional area is mainly used for heat exchange with the battery cell module 1110, while the non-functional area can be used for the input, output, and distribution of refrigerant. Refrigerant flow channels 1134 are distributed in both the functional and non-functional areas.

[0099] Considering the different functional characteristics of the inlet / outlet area 1131, the main diversion and collection area 1132, and the heat exchange area 1133, for example, the refrigerant channel 1134 in the inlet / outlet area 1131 mainly plays the role of introducing and exporting refrigerant, and its arrangement range is not too large. Moreover, the extension trajectory of the refrigerant channel 1134 in the inlet / outlet area 1131 will be variable. Therefore, it can be seen that the temperature distribution in the inlet / outlet area 1131 is uneven, and it is not suitable for heat exchange of the battery cell assembly 1110. Therefore, the battery cell assembly 1110 is designed to avoid the inlet / outlet area 1131 so that the projections of the inlet / outlet area 1131 and the battery cell assembly 1110 on the refrigerant heat exchange component 1130 do not overlap. For example, the refrigerant channel 1134 in the main distribution and collection area 1132 mainly serves the function of diverting and converging the flow, and its arrangement range is not too large. Moreover, the extension trajectory of the refrigerant channel 1134 in the main distribution and collection area 1132 is more varied, and there are many problems with uneven temperature distribution in the heat exchange area 1133. It is not suitable to exchange heat with the battery cell assembly 1110, otherwise it will cause uneven heat exchange with the battery cell assembly 1110. Therefore, the battery cell assembly 1110 is designed to avoid the main distribution and collection area 1132 so that the projections of the main distribution and collection area 1132 and the battery cell assembly 1110 on the refrigerant heat exchange component 1130 do not overlap. The heat exchange zone 1133 has a large arrangement area on the refrigerant heat exchange component 1130. The refrigerant flow channels 1134 in this zone can be uniformly arranged so that the heat exchange zone 1133 and the battery cell assembly 1110 are set relative to each other, which is more conducive to achieving balanced heat exchange of the battery cell assembly 1110.

[0100] The main shunt current collection area 1132 is located between the inlet / outlet area 1131 and the heat exchange area 1133. That is, both the inlet / outlet area 1131 and the shunt current collection area are arranged on one side of the heat exchange area 1133. The heat exchange area 1133 is relatively regular in shape. The refrigerant channels 1134 in the inlet / outlet area 1131 and the main shunt current collection area 1132 will not extend into the space between the refrigerant channels 1134 in the heat exchange area 1133. The refrigerant channels 1134 in the heat exchange area 1133 will not be scattered by the refrigerant channels 1134 in the inlet / outlet area 1131 and the main shunt current collection area 1132. The arrangement of the refrigerant channels 1134 in the heat exchange area 1133 is more regular and concentrated, which is conducive to achieving the uniformity of its own temperature distribution, thereby achieving balanced heat exchange for the battery cell module 1110.

[0101] In this embodiment, the refrigerant heat exchange component 1130 is divided into an inlet / outlet area 1131, a main branch / collector area 1132, and a heat exchange area 1133. The main branch / collector area 1132 is located between the inlet / outlet area 1131 and the heat exchange area 1133. This separates the heat exchange area 1133, which has a higher heat exchange capacity, from the main branch / collector area 1132 and the inlet / outlet area 1131. The refrigerant channels 1134 within the main branch / collector area 1132 and the inlet / outlet area 1131 are not allowed to enter the heat exchange area. Within the area of ​​the refrigerant flow channel 1134 in zone 1133, the distribution of the refrigerant flow channel 1134 in the heat exchange zone 1133 is more concentrated, and the layout path of the refrigerant flow channel 1134 can be simpler, which is conducive to making the temperature distribution in the heat exchange zone 1133 more uniform. The heat exchange zone 1133 is configured to be opposite to the battery cell assembly 1110 and to exchange heat with the battery cell assembly 1110, thereby improving the ability of the refrigerant heat exchange component 1130 to evenly exchange heat with the battery cell assembly 1110.

[0102] In some embodiments, refer to Figure 5 As shown, the heat exchange zone 1133 includes a direct current zone 11331 and a commutation zone 11332. The refrigerant flow channels 1134 in the direct current zone 11331 are configured as multiple direct current channel structures 11333 spaced apart in the second direction Y, and each direct current channel structure 11333 extends along the first direction X. The refrigerant flow channels 1134 in the commutation zone 11332 are configured as bent flow channel structures 11334, and the bent flow channel structures 11334 are connected to the direct current channel structures 11333. The second direction Y is perpendicular to the first direction X. The battery cell assembly 1110 is arranged opposite to the direct current zone 11331, or the battery cell assembly 1110 is arranged opposite to both the direct current zone 11331 and the commutation zone 11332.

[0103] Specifically, the DC zone 11331 includes multiple DC channel structures 11333. The flow path of each DC channel structure 11333 can be a straight line. The DC channel structures 11333 are spaced apart and arranged parallel to each other. Therefore, the refrigerant in the DC zone 11331 can be considered to flow in a straight line. Each DC channel structure 11333 can be considered to be a straight through-hole structure opened inside the refrigerant heat exchange component 1130. Each DC channel structure 11333 extends along the first direction X. Then, the multiple DC channel structures 11333 are arranged spaced apart in the second direction Y, which is perpendicular to the first direction X. The first direction X can be considered to be the length direction of the refrigerant heat exchange component 1130 (or heat exchange surface 11339), and the second direction Y can be considered to be the width direction of the refrigerant heat exchange component 1130.

[0104] The reversing zone 11332 is used to change the flow direction of the refrigerant. The reversing zone 11332 is provided with a bent flow channel structure 11334 that is connected to the direct flow channel structure 11333. For example, one end of two adjacent direct flow channel structures 11333 is connected through a bent flow channel structure 11334. The bent flow channel can be arc-shaped or U-shaped.

[0105] Regarding the arrangement of the battery cell module 1110, since the refrigerant flows more stably in the direct current channel structure 11333, the flow of the refrigerant will be changed by the bend channel structure 11334. Therefore, the refrigerant has high flow resistance and unstable flow velocity at the bend channel structure 11334, which will cause the temperature distribution in the commutation zone 11332 to be uneven and unstable. Therefore, the battery cell module 1110 can be made to avoid the commutation zone 11332. As for the DC channel structure 11333, the DC channel structure 11333 extends for a relatively long length along a straight line. The flow of the refrigerant within the DC channel structure 11333 is more stable, the flow resistance is relatively small, and the flow velocity is stable. Therefore, it can be seen that the temperature distribution on the DC region 11331 corresponding to the DC channel structure 11333 is more uniform and stable. Thus, the battery cell assembly 1110 can be set opposite to the DC region 11331. That is, the DC region 11331 on the heat exchange zone 1133 coincides with the projection of the battery cell assembly 1110 on the refrigerant heat exchange component 1130, so as to improve the ability of the refrigerant heat exchange component 1130 to balance the heat exchange of the battery cell assembly 1110.

[0106] Of course, considering that the temperature of the battery cell assembly 1110 near the end is relatively lower than that of the battery cell 1112 near the middle in the first direction X, the commutation zone 11332 can be set at the edge of the heat exchange surface 11339, and the battery cell 1112 in the battery cell assembly 1110 near the end can be set relative to the commutation zone 11332, so as to increase the overall heat exchange area of ​​the heat exchange zone 1133 to the battery cell assembly 1110 and reduce energy waste.

[0107] In this embodiment, the arrangement of the DC channel structure 11333 and the bent flow channel structure 11334 results in the formation of a DC region 11331 and a commutation region 11332 on the heat exchange zone 1133. The temperature distribution of the DC region 11331 is more uniform, and when the DC region 11331 exchanges heat with the battery cell assembly 1110, it is more conducive to improving the balanced heat exchange of the battery cell assembly 1110.

[0108] In some embodiments, refer to Figure 7 and Figure 8As shown, the battery cell assembly 1110 includes a plurality of battery cell groups 1111 arranged in the second direction Y, and each battery cell group 1111 includes a plurality of battery cells 1112 stacked along the first direction X.

[0109] Specifically, the battery cell group 1111 can be considered as a battery module in the battery cell assembly 1110. Considering that the DC channel structure 11333 extends in the first direction X, multiple battery cells 1112 in the battery cell group 1111 are stacked and arranged in the first direction X, and multiple battery cell groups 1111 are arranged in the second direction Y. This makes the arrangement direction of the multiple battery cells 1112 in each battery cell group 1111 consistent with the extension direction of the DC channel structure 11333, so that the DC channel structure 11333 (i.e., DC region 11331) and the battery cell group 1111 have a larger corresponding area, that is, a larger heat exchange area.

[0110] The DC channel structure 11333 allows the refrigerant to flow sequentially through each battery cell 1112, which helps reduce local overheating or undercooling of the battery cell group 1111, thereby making the overall temperature distribution of the battery cell group more uniform and reducing the performance inconsistency of the battery cell group 1111 caused by temperature differences. The DC zone 11331 has sufficient length to fully exchange heat with each battery cell 1112 in the battery cell group 1111, thereby improving heat exchange efficiency and optimizing the performance of the refrigerant heat exchange component 1130.

[0111] In this embodiment, in the second direction Y, the battery cell group 1111 can cover a larger number of DC channel structures 11333, and in the first direction X, the battery cell group 1111 can cover a longer DC channel structure 11333, which is beneficial to increase the corresponding area of ​​the battery cell assembly 1110 and the DC region 11331, increase the heat exchange area, and thus improve the heat exchange efficiency.

[0112] In some embodiments, refer to Figure 5 As shown, the direct current channel structure 11333 has a first length L1 in the first direction X, and the bent flow channel structure 11334 has a second length L2 in the first direction X. The ratio of the second length L2 to the first length L1 is less than 0.1.

[0113] Since the DC channel structure 11333 extends along the first direction X, it can be known that the first length L1 is the extension length of the DC channel structure 11333. As for the bent channel structure 11334, the second length L2 should be understood as the projected length of the bent channel structure 11334 on a plane parallel to the first direction X.

[0114] The ratio of the second length L2 to the first length L1 is made less than 0.1, resulting in a relatively short length of the bent flow channel structure 11334 in the first direction X. Since the refrigerant experiences high flow resistance and energy loss within the bent flow channel structure 11334, its extension length should be minimized. In contrast, this allows for a relatively larger extension length of the direct flow channel structure 11333. This reduces the flow resistance and energy loss of the refrigerant in the reversing zone 11332, ensuring sufficient length for adequate heat exchange in the direct flow zone 11331, thereby improving heat exchange efficiency and optimizing the performance of the refrigerant heat exchange component 1130.

[0115] It should be noted that when the bent flow channel structure 11334 is provided at different positions, the second length L2 in the ratio of the second length L2 to the first length L1 should be understood as the sum of the lengths of the multiple bent flow channel structures 11334 at different positions in the first direction X.

[0116] In this embodiment, the ratio of the first length L1 of the bent flow channel structure 11334 to the second length L2 of the direct flow channel structure 11333 is less than 0.1, thereby achieving the purpose of controlling the extension length of the bent flow channel structure 11334, which is beneficial to increasing the extension length of the direct flow channel structure 11333, as well as increasing the length and area of ​​the direct flow region 11331, so as to improve the heat exchange efficiency.

[0117] In some embodiments, refer to Figure 4 and Figure 5 As shown, the commutation zone 11332 is located at the edge of the heat exchange zone 1133, and / or the commutation zone 11332 is located between the DC zone 11331 and the main shunt collector zone 1132.

[0118] Since the heat exchange zone 1133 needs to be arranged opposite to the battery cell assembly 1110, the temperature of the battery cell 1112 located in the middle region of the battery cell assembly 1110 is relatively high, while the temperature of the battery cell 1112 located at the edge is relatively low. However, the heat exchange capacity of the commutation zone 11332 is relatively weak compared to the DC zone 11331. Therefore, the commutation zone 11332 can be arranged opposite to the battery cell 1112 at the edge, thus the commutation zone 11332 can be located at the edge of the heat exchange zone 1133.

[0119] For example, each DC channel structure 11333 extends along the first direction X, and multiple DC channel structures 11333 are arranged at intervals along the second direction Y. Therefore, each DC channel has two ends, one of which must be connected to the bent flow channel structure 11334. This results in the commutation zone 11332 being located at the end, or edge, of the heat exchange zone 1133. Consequently, the battery cell 1112 located at one end of each battery cell group 1111 will be positioned opposite the commutation zone 11332 at that edge position.

[0120] For example, if there are two reversing zones 11332, and based on the above example, there are three or more DC channel structures 11333, then along the first direction X, both ends of the DC channel structure 11333 need to be connected to the bent flow channel structure 11334. Therefore, it can be seen that the two reversing zones 11332 are respectively located at the two ends of the DC zone 11331. Since one end of the DC channel structure 11333 is connected to the refrigerant flow channel 1134 in the main branch and collector zone 1132, that is, one side of the DC zone 11331 is set close to the main branch and collector zone 1132. Therefore, it can be seen that the reversing zone 11332 can also be located between the DC zone 11331 and the main branch and collector zone 1132. Since the battery cell assembly 1110 is distributed in the heat exchange zone 1133, it can be seen that the position of the heat exchange zone 1133 near the main current distribution area 1132 will form the edge of the heat exchange zone 1133. The battery cells 1112 in the battery cell assembly 1110 near the edge also correspond to the edge of the heat exchange zone 1133. Setting two commutation zones 11332 at both ends of the DC zone 11331 can further enhance the flow effect of the refrigerant in the heat exchange zone 1133, and improve the comprehensiveness and efficiency of heat exchange.

[0121] In this embodiment, by setting the commutation zone 11332 at the edge of the heat exchange zone 1133 or between the DC zone 11331 and the main shunt current collector zone 1132, it can correspond to the battery cell 1112 at the edge position, thereby improving the effect of balanced heat dissipation.

[0122] In some embodiments, refer to Figure 4 As shown, the commutation zone 11332 also includes a sub-shunt-and-combustion structure 11335, which is connected between the partially bent flow channel structure 11334 and the partially direct flow channel structure 11333.

[0123] It is known that in the DC channel structure 11333, there are upstream channels 11337 and downstream channels 11338 with opposite flow directions. Part of the upstream channel 11337 and the corresponding part of the downstream channel 11338 are connected. Along the first direction X, the outlet of part of the downstream channel 11338 is located at one end close to the main diversion and collection area 1132, and the outlet of the other part of the downstream channel 11338 is located at the other end far away from the main diversion and collection area 1132. Therefore, it is necessary to connect the downstream channel 11338 with the outlet at the other end through the bent channel structure 11334. The bent channel structure 11334 needs to be guided to the downstream channel 11338 with the outlet located close to the main diversion and collection area 1132 through the sub-diversion and converging structure 11335. The sub-diversion and converging structure 11335 plays the role of guiding and converging.

[0124] In the above, when there are a large number of downstream channels 11338 with outlets located at the other end of the main diversion and collection area 1132, the number of sub-diversion and confluence structures 11335 can be matched accordingly. The multiple sub-diversion and confluence structures 11335 can all be connected to a downstream channel 11338 with an outlet located at the end close to the main diversion and collection area 1132, so as to play the role of diversion and confluence.

[0125] For example, refer to Figure 4 and Figure 6 As shown, multiple DC channel structures 11333 extend along the first direction X and are spaced apart along the second direction Y. Along the first direction X, the main branching and collecting area 1132 is located to the left of the DC area 11331. It can be seen that the upstream channel 11337 flows to the right along the first direction X, and the downstream channel 11338 flows to the left along the first direction X. Two downstream channels 11338 are arranged at both ends of the second direction Y. The outlets of the two downstream channels 11338 are located at the left end and are connected to the refrigerant channel 1134 of the main branching and collecting area 1132. The outlets of the remaining downstream channels 11338 are all located at the right end. Therefore, by setting the sub-branching and collecting structure 11335, the outlets of the remaining downstream channels 11338 are connected to the two downstream channels 11338 located at both ends through the sub-branching and collecting structure 11335.

[0126] In this embodiment, by adding a sub-shunt and convergence structure 11335, the flow channels used for return flow in the direct flow channel structure 11333 can be connected and converged with each other, which facilitates the directional guidance and convergence of the return refrigerant.

[0127] In some embodiments, refer to Figure 4As shown, the heat exchange zone 1133 has a third length L3 in the first direction X, and the refrigerant heat exchange component 1130 has a fourth length L4 in the first direction X. The ratio of the third length L3 to the fourth length L4 is greater than or equal to 0.6 and less than 1.

[0128] Specifically, the first direction X can be understood as the length direction of the heat exchange zone 1133. The inlet / outlet zone 1131, the main branching and collecting zone 1132, and the heat exchange zone 1133 can also be arranged sequentially in the first direction X. Since the refrigerant flow channel 1134 in the heat exchange zone 1133 is configured to exchange heat with the battery cell assembly 1110, it can be known that the surface of the heat exchange zone 1133 opposite to the battery cell assembly 1110 forms the heat exchange surface 11339. The third length L3 should be understood as the length of the heat exchange surface 11339 in the first direction X. When the heat exchange zone 1133 includes the direct current zone 11331 and the commutation zone 11332, the third length L3 can also be understood as the sum of the lengths of the direct current zone 11331 and the commutation zone 11332 in the first direction X. That is, the third length L3 is the sum of the first length L1 and the second length L2.

[0129] The fourth length L4 is the length of the refrigerant heat exchange component 1130. It should be understood that the length of the refrigerant heat exchange component 1130 should be its length along the first direction X. For example, the refrigerant heat exchange component 1130 has a first surface 1135, and a portion of the first surface 1135 (i.e., the heat exchange surface 11339) is disposed opposite to the battery cell assembly 1110. Therefore, the length of the refrigerant heat exchange component 1130 is the length of the first surface 1135 along the first direction X.

[0130] The ratio of the third length L3 to the fourth length L4 should be understood as the ratio of the length of the heat exchange surface 11339 to the length of the first surface 1135 in the first direction X, that is, the ratio of the heat exchange zone 1133 to the sum of the inlet and outlet zone 1131, the main branch and collector zone 1132 and the heat exchange zone 1133. When the width of the refrigerant heat exchange component 1130 in the second direction Y is the same, the ratio of the heat exchange zone 1133 to the sum of the inlet and outlet zone 1131, the main branch and collector zone 1132 and the heat exchange zone 1133 can also be understood as the ratio of the area of ​​the heat exchange zone 1133 to the sum of the areas of the inlet and outlet zone 1131, the main branch and collector zone 1132 and the heat exchange zone 1133, that is, the proportion of the heat exchange zone 1133 on the first surface 1135 of the entire refrigerant heat exchange component 1130.

[0131] In this example, the ratio of the third length L3 to the fourth length L4 is controlled to be between 0.6 and 1.0, and not equal to 1.0. This ratio indicates that the heat exchange zone 1133 occupies a large proportion of the refrigerant heat exchange component 1130, which is beneficial for ensuring sufficient contact area between the battery cell assembly 1110 and the refrigerant heat exchange component 1130 for heat exchange. This improves the performance of the thermal management system and effectively controls the temperature of the battery cell 1112. It should be noted that the ratio of the third length L3 to the fourth length L4 can be any value between 0.6 and 1.0 except for 1.

[0132] For example, the ratio of the third length L3 to the fourth length L4 is 0.875. In practical applications, when a value of 0.875 is used, the refrigerant heat exchange component 1130 can have a sufficiently large heat exchange surface 11339, resulting in lower energy loss and a better balanced heat exchange effect.

[0133] In this embodiment, by controlling the proportion of the heat exchange zone 1133 on the refrigerant heat exchange component 1130 to be greater than or equal to 0.6 and less than 1, it is beneficial to make the heat exchange zone 1133 occupy a large proportion in the refrigerant heat exchange component 1130, which is beneficial to have sufficient contact area between the battery cell assembly 1110 and the refrigerant heat exchange component 1130 for heat exchange and improve the heat exchange efficiency.

[0134] In some embodiments, refer to Figure 7-9 As shown, the heat exchange zone 1133 has a heat exchange surface 11339 opposite to the battery cell assembly 1110, and the refrigerant flow channel 1134 in the heat exchange zone 1133 is configured to be opposite to the heat exchange surface 11339; the ratio of the projected area S1 of the refrigerant flow channel 1134 in the heat exchange zone 1133 on the heat exchange surface 11339 to the area S2 of the heat exchange surface 11339 is greater than or equal to 0.4 and less than or equal to 0.8.

[0135] Specifically, the heat exchange surface 11339 should be understood as a portion of the first surface 1135 of the refrigerant heat exchange component 1130, which is the surface of the heat exchange zone 1133 that is opposite to and matches the battery cell assembly 1110 and exchanges heat.

[0136] For the refrigerant heat exchange component 1130 itself, the refrigerant flow channels 1134 opened in the heat exchange zone 1133 should be arranged opposite to the heat exchange surface 11339. Since there are gaps between adjacent refrigerant flow channels 1134, it can be known that the arrangement area of ​​the refrigerant flow channels 1134 will be smaller than the area of ​​the heat exchange surface 11339. However, if the arrangement area of ​​the refrigerant flow channels 1134 is too small, it will affect the heat exchange capacity and effect; if the arrangement area of ​​the refrigerant flow channels 1134 is too large, that is, the arrangement density of the refrigerant flow channels 1134 is relatively large, the strength of the gap between two adjacent refrigerant flow channels 1134 will be affected. Therefore, it is necessary to reasonably control the proportion of the refrigerant flow channels 1134 in the heat exchange zone 1133.

[0137] Therefore, in this example, the ratio of the projected area S1 of the refrigerant channel 1134 in the heat exchange zone 1133 on the heat exchange surface 11339 to the area S2 of the heat exchange surface 11339 is greater than or equal to 0.4 and less than or equal to 0.8. This ratio can be any value between 0.4 and 0.8, for example, 0.5, 0.6, 0.7, etc. This ratio of 0.4 to 0.8 makes the spacing L5 between adjacent refrigerant channels 1134 more reasonable, that is, the thickness of the channel wall is more reasonable, and the channel wall is less likely to be breached by the refrigerant.

[0138] In this embodiment, by reasonably controlling the projected area ratio of the refrigerant flow channel 1134 on the surface of the heat exchange zone 1133, sufficient heat exchange area can be provided between the refrigerant and the battery cell 1112, reducing the risk of the refrigerant flow channel 1134 being too dense or too sparse, which is beneficial to optimizing the heat exchange effect, and also facilitates the design and manufacturing of the refrigerant flow channel 1134.

[0139] In some embodiments, refer to Figure 4 As shown, along the second direction Y, the interval L5 between two adjacent DC channel structures 11333 ranges from 5mm to 15mm.

[0140] Since the refrigerant flows within the direct current channel structure 11333 and exerts pressure on the channel wall, and since the heat exchange method of this refrigerant heat exchange component 1130 is direct cooling, it is known that there is pressure inside the direct current channel structure 11333, which will also exert pressure on the channel wall. Therefore, the channel wall between two adjacent direct current channel structures 11333 needs to have sufficient support.

[0141] The spacing L5 between two adjacent DC channel structures 11333 should be understood as the distance between two closely arranged flow channel walls of the two adjacent DC channel structures 11333, which is also the thickness of the flow channel wall. In order for the flow channel wall to resist the extrusion pressure of the refrigerant and the pressure inside the flow channel, the spacing L5 between two adjacent DC channel structures 11333 is in the range of 5mm-15mm, which means that the thickness of the flow channel wall between two adjacent DC channel structures 11333 is 5mm-15mm. The thickness of the flow channel wall can be any value between 5mm and 15mm. For example, the thickness of the flow channel wall can be any value between 5mm and 10mm.

[0142] In addition, the 5mm-15mm interval distance L5 can also enable multiple direct current channel structures 11333 to have sufficient coverage area in the heat exchange zone 1133, increase the projected area of ​​the refrigerant channel 1134 on the heat exchange surface 11339, and thus increase the arrangement density of the refrigerant channel 1134, so as to achieve the purpose of uniform temperature distribution in the heat exchange zone 1133.

[0143] In this embodiment, the 5mm-15mm interval L5 allows the refrigerant sufficient flow space between the DC channel structures 11333 and enables adjacent DC channel structures 11333 to effectively exchange heat with the battery cell assembly 1110, reducing the risk of insufficient heat exchange due to excessively large intervals or excessive flow resistance due to excessively small intervals.

[0144] In some embodiments, refer to Figure 4 As shown, the width L6 of the refrigerant flow channel is greater than or equal to 6 mm and less than or equal to 15 mm.

[0145] An excessively wide refrigerant channel 1134 reduces the contact area between the refrigerant and the battery cell 1112. Within the same heat exchange zone 1133, an increased width of the refrigerant channel 1134 means a reduction in the number of channels. Simultaneously, the refrigerant's flow velocity decreases in a wider channel 1134, resulting in less heat removal per unit time. This hinders the timely and effective transfer of heat generated by the battery cell 1112, impacting the battery's heat dissipation and making it difficult to maintain a suitable operating temperature. Conversely, an excessively narrow refrigerant channel 1134 restricts the refrigerant flow space and flow rate, further affecting heat dissipation.

[0146] Specifically, the refrigerant flow channel 1134 may include one or more independent or interconnected channels. The width L6 of the refrigerant flow channel is greater than or equal to 6 mm and less than or equal to 15 mm, meaning that the width of a refrigerant flow channel is greater than or equal to 6 mm and less than or equal to 15 mm. For example, the width L6 of the refrigerant flow channels in the inlet / outlet area 1131, the main branch flow collection area 1132, and the heat exchange area 1133 mentioned above is greater than or equal to 6 mm and less than or equal to 15 mm.

[0147] Since the cross-sectional shape of the refrigerant channel 1134 can be various shapes, such as circular, elliptical, and polygonal, for example, if the cross-sectional shape of the refrigerant channel 1134 is circular, then the width L6 of the refrigerant channel is greater than or equal to 6 mm and less than or equal to 15 mm, meaning that the diameter of the refrigerant channel 1134 is greater than or equal to 6 mm and less than or equal to 15 mm; as another example, if the cross-sectional shape of the refrigerant channel 1134 is elliptical, then the width L6 of the refrigerant channel is greater than or equal to 6 mm and less than or equal to 15 mm, meaning that the length of the major axis or minor axis of the refrigerant channel 1134 is greater than or equal to 6 mm and less than or equal to 15 mm; as yet another example, if the cross-sectional shape of the refrigerant channel 1134 is rectangular, then the width L6 of the refrigerant channel is greater than or equal to 6 mm and less than or equal to 15 mm, meaning that the length or width of the rectangle is greater than or equal to 6 mm and less than or equal to 15 mm.

[0148] The 6mm-15mm cold flow channel width can optimize heat exchange efficiency. This width allows the refrigerant to have sufficient heat exchange area with the battery cell 1112 when flowing in the DC channel structure 11333. It can also achieve efficient heat transfer while ensuring the refrigerant flow rate, so that the heat generated by the battery cell 1112 can be carried away by the refrigerant in time and maintain the battery's suitable operating temperature.

[0149] A flow channel width of 6mm-15mm can also balance fluid resistance, as this width helps to balance the resistance to refrigerant flow. For example, the width L6 of the refrigerant flow channel can be any value between 6mm and 15mm. When the interval is appropriate, the refrigerant flows smoothly within the refrigerant flow channel 1134, without excessive resistance due to the refrigerant flow channel 1134 being too narrow, thus avoiding increased pump energy consumption; nor will the refrigerant flow velocity be too low due to the refrigerant flow channel 1134 being too wide, thus affecting heat dissipation efficiency. This can reduce the energy consumption of the entire cooling system and improve energy utilization efficiency while ensuring heat dissipation effect.

[0150] In this embodiment, a flow channel width of 6mm-15mm can control the refrigerant's flow rate, flow rate, flow resistance, and pressure drop, ensuring good flow of the refrigerant within the refrigerant flow channel 1134. This not only improves heat exchange efficiency but also avoids increasing costs or affecting thermal management performance due to the refrigerant flow channel 1134 being too wide or too narrow.

[0151] In some embodiments, refer to Figure 4As shown, the refrigerant heat exchange component 1130 also has multiple cavities 1138 inside, and each cavity 1138 is configured not to be connected to the refrigerant flow channel 1134.

[0152] Specifically, cavity 1138 can be understood as the hollow space inside refrigerant heat exchange component 1130. For example, during the manufacturing process of refrigerant heat exchange component 1130, it 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. Cavity 1138, as a structural cavity, 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 refrigerant heat exchange component 1130, and reducing the risk of refrigerant leakage.

[0153] Furthermore, by adding multiple cavities 1138 within the space outside the refrigerant flow channel 1134, 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, 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.

[0154] 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.

[0155] In some embodiments, refer to Figure 14 As shown, the refrigerant heat exchange component 1130 also has multiple mounting holes 1139, which are distributed in the heat exchange zone 1133 and avoid the refrigerant flow channel 1134.

[0156] Specifically, 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.

[0157] 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 X. The mounting hole 1139 can be set between two refrigerant channels 1134 and is not connected to the refrigerant channels 1134. The diameter of the mounting hole 1139 can be larger than the interval L5 between two adjacent refrigerant channels 1134. Then, the refrigerant channel 1134 can be bent at the position opposite to the mounting hole 1139. That is, at the position opposite to the mounting hole 1139, the refrigerant channel 1134 is bent, for example, it is bent in a semi-circular shape.

[0158] 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.

[0159] In some embodiments, refer to Figure 4 and Figure 6 As shown, the inlet / outlet area 1131, the main branching and collecting area 1132, and the heat exchange area 1133 are arranged sequentially in the first direction X. The refrigerant flow channel 1134 in the inlet / outlet area 1131 includes a first flow channel 11311 and a second flow channel 11312. The flow direction of the refrigerant in the first flow channel 11311 is opposite to the flow direction of the refrigerant in the second flow channel 11312. The refrigerant flow channel 1134 in the main branching and collecting area 1132 is... 134 includes a first flow channel 11321 and a second flow channel 11322. The refrigerant flow channel 1134 in the heat exchange zone 1133 includes an upstream flow channel 11337 and a downstream flow channel 11338 that are connected to each other. The first flow channel 11311, the first flow channel 11321 and the upstream flow channel 11337 are connected in sequence, and the second flow channel 11312, the second flow channel 11322 and the downstream flow channel 11338 are connected in sequence.

[0160] Specifically, the refrigerant flow direction in the first flow channel 11311 is opposite to that in the second flow channel 11312. This means that when the refrigerant in the first flow channel 11311 flows in, the refrigerant in the second flow channel 11312 flows out; or, when the refrigerant in the first flow channel 11311 flows out, the refrigerant in the second flow channel 11312 flows in. Each first flow channel 11311 and each second flow channel 11312 is respectively connected to each refrigerant flow channel 1134 in the main distribution and collection area 1132 with the opposite flow direction. That is, 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. The flow directions of the first flow channel 11311 and the second flow channel 11312 can both be parallel to the first direction X.

[0161] The first flow channel 11321 and the second flow channel 11322 are also two flow channels with opposite flow directions within the main diversion and collection area 1132. The first flow channel 11321 connects the first flow channel 11311 and the upstream flow channel 11337, and can play the role of diversion (or confluence). The second flow channel 11322 connects the second flow channel 11312 and the downstream flow channel, and can play the role of confluence (or diversion). Both the first flow channel 11321 and the second flow channel 11322 may include multiple branch channels.

[0162] The upstream flow channel 11337 is connected to the downstream flow channel 11338. The end of the upstream flow channel 11337 away from the downstream flow channel 11338 forms a heat exchange inlet, which is connected to the first flow channel 11321. The end of the downstream flow channel 11338 away from the upstream flow channel 11337 forms a heat exchange outlet, which is connected to the second flow channel 11322. This allows the refrigerant to enter the upstream flow channel 11337 from the heat exchange inlet, then flow to the downstream flow channel 11338, and finally flow out from the heat exchange outlet, forming a circulating heat exchange.

[0163] 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, so that the heat exchange channels in 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, so that the functionally different areas on the refrigerant heat exchange component 1130 form a regular pattern of partitioned arrangement.

[0164] In this embodiment, the arrangement of the inlet / outlet area 1131, the main diversion and collection area 1132, and the heat exchange area 1133 is more regular. The battery cell assembly 1110 is arranged opposite to the heat exchange area 1133, thereby enabling targeted centralized heat exchange and improving the balance of heat exchange.

[0165] In some embodiments, refer to Figure 6As shown, the refrigerant flow channel 1134 in the heat exchange zone 1133 includes multiple heat exchange sub-channels 11336 arranged in parallel. Each heat exchange sub-channel 11336 includes an upstream flow channel 11337 and a downstream flow channel 11338. The upstream flow channel 11337 in some heat exchange sub-channels 11336 is adjacent to and thermally compatible with the downstream flow channel 11338 in the adjacent heat exchange sub-channel 11336. The downstream flow channel 11338 in some heat exchange sub-channels 11336 is adjacent to and thermally compatible with the upstream flow channel 11337 in the adjacent heat exchange sub-channel 11336.

[0166] Reference Figure 6 As shown, the refrigerant flow channel 1134 in the heat exchange zone 1133 includes multiple heat exchange sub-channels 11336. Each heat exchange sub-channel 11336 forms a heat exchange loop. That is, each heat exchange sub-channel 11336 has a heat exchange inlet and a heat exchange outlet. In each heat exchange sub-channel 11336, the upstream channel 11337 is connected to the downstream channel 11338.

[0167] It should be noted that the upstream flow channel 11337 and the downstream flow channel 11338 can be understood as a straight flow channel structure 11333, and the part connecting the upstream flow channel 11337 and the downstream flow channel 11338 can be understood as a bent flow channel structure 11334.

[0168] Assuming that the downstream flow channels 11338 of the multiple heat exchange sub-flow channels 11336 are centrally arranged, the refrigerant heat exchange component 1130 will form a large overheated area on the heat exchange surface 11339 area corresponding to the downstream flow channel 11338. The overheated area refers to the area with weak heat exchange capacity. If the area of ​​the overheated area 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.

[0169] Analyzing the overheating problem, since the refrigerant in the upstream channel 11337 has a strong heat exchange capacity, the temperature of the area on the heat exchange surface 11339 corresponding to the upstream channel 11337 is low. Conversely, the refrigerant in the downstream channel 11338 has a relatively weak heat exchange capacity, and the temperature of the area on the heat exchange surface 11339 corresponding to the downstream channel 11338 is high. Therefore, to reduce the area of ​​the overheated region, multiple heat exchange sub-channels 11336 in the refrigerant heat exchange channel are arranged side-by-side. Furthermore, the upstream channel 11337 in some of the heat exchange sub-channels 11336 is adjacent to and thermally compatible with the downstream channel 11338 in the adjacent heat exchange sub-channels 11336. The downstream flow channel 11338 in the heat exchange sub-flow channel 11336 is adjacent to and thermally coordinated with the upstream flow channel 11337 in the adjacent heat exchange sub-flow channel 11336. That is, the upstream flow channel 11337 and the downstream flow channel 11338 in the two adjacent heat exchange sub-flow channels 11336 are configured to be adjacent. Thermal coordination means that the adjacent upstream flow channel 11337 and the downstream flow channel 11338 can conduct heat (or exchange heat). It can also be understood that due to the adjacent configuration of the upstream flow channel 11337 and the downstream flow channel 11338, the area on the heat exchange surface 11339 corresponding to the upstream flow channel 11337 and the area on the heat exchange surface 11339 corresponding to the downstream flow channel 11338 can conduct heat (or exchange heat).

[0170] Therefore, it can be seen that the thermal conductivity between the upstream flow channel 11337 and the downstream flow channel 11338 is such that the low temperature of the upstream flow channel 11337 balances the high temperature of the downstream flow channel 11338. In other words, the low-temperature region on the heat exchange surface 11339 corresponding to the upstream flow channel 11337 balances the high temperature region on the heat exchange surface 11339 corresponding to the downstream flow channel 11338. This reduces the temperature difference on the heat exchange surface 11339 of the refrigerant heat exchange component 1130. Thus, the temperature of the region on the heat exchange surface 11339 corresponding to the downstream flow channel 11338 adjacent to the upstream flow channel 11337 is less likely to rise excessively; instead, the temperature is relatively lower, making it less prone to overheating and resulting in a more balanced temperature distribution on the heat exchange surface 11339. Therefore, the upstream flow channel 11337 and the downstream flow channel 11338 in the two adjacent heat exchange sub-flow channels 11336 form a uniform temperature region on the heat exchange surface 11339.

[0171] It should be noted that the upstream flow channel 11337 and the downstream flow channel 11338 of the multiple heat exchange sub-flow channels 11336 are opposite to the heat exchange surface 11339. The heat exchange medium in the upstream flow channel 11337 and the downstream flow channel 11338 will exchange heat with the heat exchange surface 11339, and the heat exchange surface 11339 will then exchange heat with the battery cell module 1110.

[0172] The battery cell assembly 1110 can directly contact the heat exchange surface 11339 of the refrigerant heat exchange component 1130 for heat exchange, or the battery cell assembly 1110 and the heat exchange surface 11339 can be spaced apart and arranged close to the heat exchange surface 11339, so that the refrigerant heat exchange component 1130 can exchange heat with the battery cell assembly 1110 through the heat exchange surface 11339, thereby achieving the purpose of cooling the battery cell assembly 1110.

[0173] Combination Figure 15 The schematic diagram of the temperature distribution in the refrigerant heat exchange channel clearly shows that the temperature of the downstream channel 11338, which is adjacent to the upstream channel 11337, is significantly balanced. Figure 15 In this context, the larger the number, the higher the temperature; the size of the number reflects the temperature level.

[0174] In this embodiment, the upstream flow channel 11337 and the downstream flow channel 11338 of the two heat exchange sub-flow channels 11336 are arranged adjacent to each other. The low temperature of the upstream flow channel 11337 can balance the high temperature of the downstream flow channel 11338, thereby reducing the temperature of the area on the heat exchange surface 11339 corresponding to the downstream flow channel 11338. 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 11339 of the refrigerant heat exchange component 1130 more uniform, thereby improving the heat exchange uniformity of the battery cell module 1110.

[0175] In some embodiments, refer to Figure 6 As shown, multiple heat exchange sub-channels 11336 are arranged sequentially along the second direction Y. The upstream channel 11337 and the downstream channel 11338 in the heat exchange sub-channels 11336 both extend along the first direction X. The second direction Y is perpendicular to the first direction X.

[0176] It should be noted that the first direction X can be any direction parallel to the heat exchange surface 11339. For example, the first direction X is the length direction (or width direction) of the heat exchange surface 11339. Correspondingly, the second direction Y is the width direction (or length direction) of the heat exchange surface 11339.

[0177] Specifically, the first direction X and the second direction Y are both parallel to the heat exchange surface 11339. Taking the refrigerant heat exchange component 1130 as a plate as an example, the part of one side plate of the refrigerant heat exchange component 1130 that is opposite to the battery cell assembly 1110 can form the heat exchange surface 11339. When the first direction X is the length direction of the plate, the second direction Y is the width direction of the plate. The upstream flow channel 11337 and the downstream flow channel 11338 are both extended along the first direction X. It can be seen that the upstream flow channel 11337 and the downstream flow channel 11338 are parallel and spaced apart. The extension direction of the upstream flow channel 11337 and the downstream flow channel 11338 is along the length direction of the plate. A heat exchange sub-flow channel 11336 may include multiple upstream flow channels 11337 and multiple downstream flow channels 11338. Along the first direction X, the upstream flow channel 11337 and the downstream flow channel 11338 are connected at one end.

[0178] In this embodiment, extending the upstream flow channel 11337 and the downstream flow channel 11338 in the first direction X and setting them adjacent to each other is beneficial to increasing the length of the adjacent area between the upstream flow channel 11337 and the downstream flow channel 11338, which is beneficial to increasing the area of ​​adjacent heat exchange and increasing the efficiency of heat exchange.

[0179] In some embodiments, refer to Figure 12 and Figure 13 As shown, there is at least one first flow channel 11311 and multiple second flow channels 11312. All the first flow channels 11311 are distributed between two adjacent second flow channels 11312.

[0180] Specifically, when there are multiple first flow channels 11311, the multiple first flow channels 11311 are arranged adjacent to each other, and all the first flow channels 11311 are distributed between any two second flow channels 11312 in all the second flow channels 11312. For example, the flow direction of the first flow channel 11311 is the inflow direction, which is the direction of entry into the refrigerant flow channel 1134 in the main distribution and collection area 1132. Then, the flow direction of the second flow channel 11312 is the outflow direction. Multiple first flow channels 11311 are arranged adjacently and distributed between any two adjacent second flow channels 11312. It can be seen that all the inflow direction first flow channels 11311 are distributed between the two outflow direction second flow channels 11312. That is, the inflow direction flow channel is located near the center, while the outflow direction flow channel is located on the outer side away from the center. The first flow channel 11311 is sandwiched in the middle area of ​​the two second flow channels 11312, or in other words, the second flow channel 11312 is wrapped around the outside of all the first flow channels 11311.

[0181] Optionally, for example, if the flow direction of the first flow channel 11311 is the outflow direction, then the flow direction of the second flow channel 11312 is the inflow direction. This allows multiple first flow channels 11311 to be arranged adjacently and distributed between any two adjacent second flow channels 11312. It can be seen that all the first flow channels 11311 in the outflow direction are distributed between the two second flow channels 11312 in the inflow direction. That is, the outflow channel is located near the center, while the inflow channel is located on the outer side away from the center. The first flow channel 11311 is sandwiched in the middle region of the two second flow channels 11312, or in other words, the second flow channel 11312 is wrapped around the outside of all the first flow channels 11311.

[0182] In this embodiment, the first flow channel 11311 is centrally arranged between the two second flow channels 11312, which reduces the installation space and complexity, and facilitates the centralized delivery of refrigerant. The centralized and compact flow channel layout facilitates the integrated installation with structural components and other components, which helps to improve the integration and reliability of the entire system.

[0183] In some embodiments, the refrigerant in the first flow channel 11311 flows in the same direction as the refrigerant inlet channel 1134 in the main distribution and collection area 1132.

[0184] It can be seen that the inflow channel is located between the two outflow channels. The first inflow channel 11311 is located in the middle, which realizes the effect of the refrigerant entering the refrigerant channel 1134 in the dispersed main distribution and collection area 1132 from the middle. In this case, the inflow refrigerant channel 1134 in the main distribution and collection area 1132 can also be located in the middle area of ​​the main distribution and collection area 1132. However, since the second outflow channel 11312 is located on both sides, in this case, the outflow refrigerant channel 1134 in the main distribution and collection area 1132 can also be located on both sides or the edge area of ​​the main distribution and collection area 1132. This allows the refrigerant in the inflow direction of the inlet and outlet area 1131 and the main distribution and collection area 1132 to be controlled in the middle, while the refrigerant in the outflow direction is controlled at the edge, making the overall flow of the refrigerant more concentrated and regular.

[0185] Furthermore, the refrigerant flowing in the same direction is more concentrated, which helps to reduce the flow resistance caused by multiple reversals, improves the smoothness of refrigerant flow, and enhances flow efficiency.

[0186] In this embodiment, the above design is beneficial to arrange the refrigerant in the inflow direction in the central region of the refrigerant heat exchange component 1130, which is beneficial to increase the flow rate of the refrigerant when it flows in and improve the heat exchange efficiency.

[0187] In some embodiments, refer to Figure 11 As shown, the first flow channel 11321 includes multiple first branch channels 11323 and multiple second branch channels 11324. Each first branch channel 11323 is connected to each of the multiple second branch channels 11324. The first branch channels 11323 extend along the second direction Y, and each second branch channel 11324 extends along the first direction X. The end of each first branch channel 11323 away from the second branch channel 11324 is connected to the refrigerant flow channel 1134 (i.e., the first flow channel 11311 or the second flow channel 11312) in the inlet / outlet area 1131. The end of each second branch channel 11324 away from the first branch channel 11323 is connected to the refrigerant flow channel 1134 (i.e., the upstream flow channel 11337) in the heat exchange area 1133. The second direction Y is perpendicular to the first direction X.

[0188] Specifically, the first branch channel 11323 and each of the second branch channels 11324 are connected and configured. The heat exchange medium first flows from the first main channel 11311 through the first branch channel 11323, and then enters each of the second branch channels 11324. From each of the second branch channels 11324, it enters each of the corresponding refrigerant channels 1134 (specifically, each of the corresponding upstream channels 11337) within the heat exchange zone 1133. The first branch channel 11323 and the second branch channel 11324 form corresponding branching areas on the first surface 1135 of the refrigerant heat exchange component 1130.

[0189] One or more first branch channels 11323 can be provided. Each first branch channel 11323 is connected to multiple second branch channels 11324. The first branch channel 11323 extends along the second direction Y. The extension length direction of the first branch channel 11323 is the same as the arrangement direction of each heat exchange sub-channel 11336. Assuming that the flow direction of the first branch channel 11323 is the inflow direction, the heat exchange medium can flow more smoothly in the first branch channel 11323, which helps to reduce the flow path of the refrigerant into the second branch channel 11324 and the upstream channel 11337, and helps to reduce heat exchange losses.

[0190] Each of the second branch channels 11324 extends along the first direction X, that is, each of the second branch channels 11324 is parallel and spaced apart. Each of the second branch channels 11324 is perpendicularly connected to the first branch channel 11323. Each of the upstream channels 11337 extends along the first direction X, so that each of the second branch channels 11324 is opposite to each of the upstream channels 11337. This allows the heat exchange medium to flow more smoothly from each of the second branch channels 11324 into each of the upstream channels 11337, and helps to shorten the flow path of the heat exchange medium in the upstream channels 11337, thereby reducing heat loss.

[0191] The heat exchange medium (i.e., refrigerant) enters the refrigerant heat exchange component 1130 to reduce the temperature difference problem caused by uneven flow distribution. The flow distribution of the heat exchange medium is easily affected by the dryness of the heat exchange medium. The greater the dryness, the more difficult the flow distribution. The dryness of the heat exchange medium is the smallest when it enters the refrigerant heat exchange component 1130. Therefore, the heat exchange medium is least affected when the flow is distributed in this area. This area is generally divided into multiple second flow channels 11324. The purpose is to set multiple upstream flow channels 11337 to reduce the impact of poor heat exchange capacity of a certain heat exchange sub-flow channel 11336 on the uniform temperature of the cold plate. Moreover, the upstream flow channel 11337 and the downstream flow channel 11338 in any two adjacent heat exchange sub-flow channels 11336 can be mutually balanced to further improve the uniform temperature performance of the refrigerant heat exchange component 1130. The effective length of the multiple heat exchange sub-channels 11336 should be kept consistent to reduce the uneven flow caused by the difference in flow resistance in each first sub-channel 11323 and second sub-channel 11324, thereby further reducing the temperature difference on the refrigerant heat exchange component 1130 (or the first surface 1135) and improving the temperature uniformity performance of the refrigerant heat exchange component 1130.

[0192] The cross-sectional areas of the first branch channel 11323 and the second branch channel 11324 are made equal to the cross-sectional area of ​​the upstream channel 11337. In other words, the cross-sectional areas of the upstream channel 11337, the downstream channel 11338, the first branch channel 11323, and the second branch channel 11324 are all equal. This helps to reduce the flow resistance of the refrigerant during the process of the refrigerant entering the second branch channel 11324 from the first branch channel 11323 and during the process of the refrigerant entering the upstream channel 11337 from the second branch channel 11324.

[0193] In this embodiment, the first branch channel 11323 and the second branch channel 11324 are connected, and the first branch channel 11323 is extended along the second direction Y to be consistent with the arrangement direction of each heat exchange sub-channel 11336, which is beneficial to improving the smoothness of heat exchange medium flow. Each second branch channel 11324 is perpendicular to the first branch channel 11323 and is opposite to each upstream channel 11337, which improves the smoothness of heat exchange medium flow, helps to reduce the flow path of heat exchange medium, and reduces heat exchange loss.

[0194] 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.

[0195] 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.

[0196] 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.

[0197] 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.

[0198] In some embodiments, the refrigerant channel 1134 is filled with a phase change medium.

[0199] 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 coolant channel 1134 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.

[0200] 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.

[0201] In this embodiment, filling the refrigerant channel 1134 with a phase change medium is beneficial to improving heat exchange efficiency and enhancing the performance stability of the battery device 1100.

[0202] In some embodiments, the refrigerant heat exchange component 1130 is formed from one or more of metals and non-metals.

[0203] 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.

[0204] 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.

[0205] In some embodiments, refer to Figure 3 and Figure 4 As shown, the battery device 1100 also includes a connector component 1140, which is connected to the refrigerant heat exchange component 1130 and communicates with the refrigerant flow channel 1134 of the inlet and outlet area 1131.

[0206] Specifically, the connector component 1140 has a flow channel inlet and a flow channel outlet. The refrigerant flow channel 1134 in the inlet / outlet area 1131 includes multiple first flow channels 11311 and multiple second flow channels 11312. The flow channel inlet is connected to each of the first flow channels 11311, and the flow channel outlet is connected to each of the second flow channels 11312. The connector component 1140 can be connected to the refrigerant heat exchange component 1130 by welding, or the connector component 1140 can also be connected to the refrigerant heat exchange component 1130 by fasteners or other components. The connector component 1140 can be located on the upper part of the first surface 1135 and near the edge.

[0207] In this embodiment, by providing the connector component 1140, it is easy to connect to an external pipeline used to transport the heat exchange medium (i.e., refrigerant), thereby improving the ease of assembly.

[0208] According to some embodiments of this application, 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.

[0209] 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.

[0210] 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.

[0211] 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.

[0212] 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.

[0213] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0214] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0215] 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.

[0216] 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.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0221] 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.

[0222] 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.

[0223] 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.

[0224] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use individual battery cells, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft.

[0225] 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.

[0226] 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.

[0227] 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.

[0228] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0229] 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 in that, 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) includes an inlet / outlet area (1131), a main distribution and collection area (1132), and a heat exchange area (1133), each with a refrigerant flow channel (1134). The main distribution and collection area (1132) is located between the inlet / outlet area (1131) and the heat exchange area (1133). The refrigerant flow channels (1134) in the main distribution and collection area (1132) connect the refrigerant flow channels (1134) in the inlet / outlet area (1131) and the refrigerant flow channels (1134) in the main distribution and collection area (1132). The inlet / outlet area (1131) is configured with... To introduce or export refrigerant into the refrigerant flow channel (1134); the heat exchange zone (1133) coincides with the projection of the battery cell assembly (1110) on the refrigerant heat exchange component (1130), and the refrigerant flow channel (1134) in the heat exchange zone (1133) is configured to exchange heat with the battery cell assembly (1110); the main diversion and collection zone (1132) and the inlet and outlet zone (1131) are both configured not to coincide with the projection of the battery cell assembly (1110) on the refrigerant heat exchange component (1130).

2. The battery device (1100) as claimed in claim 1, characterized in that, The heat exchange zone (1133) includes a direct current zone (11331) and a commutation zone (11332). The refrigerant channels (1134) in the direct current zone (11331) are configured as a plurality of direct current channel structures (11333) spaced apart in a second direction (Y), and each direct current channel structure (11333) extends along a first direction (X). The refrigerant channels (1134) in the commutation zone (11332) are configured as bent channel structures (11334), and the bent channel structures (11334) are connected to the direct current channel structures (11333). The second direction (Y) is perpendicular to the first direction (X). The battery cell assembly (1110) is arranged opposite to the direct current zone (11331), or the battery cell assembly (1110) is arranged opposite to both the direct current zone (11331) and the commutation zone (11332).

3. The battery device (1100) as claimed in claim 2, characterized in that, The battery cell assembly (1110) includes a plurality of battery cell groups (1111) arranged in a second direction (Y), and each of the battery cell groups (1111) includes a plurality of battery cells (1112) stacked along a first direction (X).

4. The battery device (1100) as claimed in claim 2, characterized in that, The direct current channel structure (11333) has a first length (L1) in the first direction (X), and the bent channel structure (11334) has a second length (L2) in the first direction (X), wherein the ratio of the second length (L2) to the first length (L1) is less than 0.

1.

5. The battery device (1100) as claimed in claim 2, characterized in that, The commutation zone (11332) is located at the edge of the heat exchange zone (1133), and / or the commutation zone (11332) is located between the DC zone (11331) and the main shunt collector zone (1132).

6. The battery device (1100) as claimed in claim 2, characterized in that, The reversing zone (11332) further includes a sub-shunt-and-combine structure (11335) which is connected between a portion of the bent flow channel structure (11334) and a portion of the direct flow channel structure (11333).

7. The battery device (1100) according to any one of claims 1-6, characterized in that, The heat exchange zone (1133) has a third length (L3) in the first direction (X), and the refrigerant heat exchange component (1130) has a fourth length (L4) in the first direction (X). The ratio of the third length (L3) to the fourth length (L4) is greater than or equal to 0.6 and less than 1.

8. The battery device (1100) according to any one of claims 1-6, characterized in that, The heat exchange zone (1133) has a heat exchange surface (11339) opposite to the battery cell assembly (1110), and the refrigerant channel (1134) in the heat exchange zone (1133) is configured to be opposite to the heat exchange surface (11339); the ratio of the area of ​​the projection region of the refrigerant channel (1134) in the heat exchange zone (1133) on the heat exchange surface (11339) to the area of ​​the heat exchange surface (11339) is greater than or equal to 0.4 and less than or equal to 0.

8.

9. The battery device (1100) according to any one of claims 2-6, characterized in that, Along the second direction (Y), the spacing distance (L5) between two adjacent DC channel structures (11333) ranges from 5mm to 15mm.

10. The battery device (1100) according to any one of claims 1-6, characterized in that, The width (L6) of the refrigerant channel ranges from 6mm to 15mm.

11. The battery device (1100) according to any one of claims 1-6, characterized in that, The refrigerant heat exchange component (1130) also has multiple cavities (1138) inside, each of which is not connected to the refrigerant flow channel (1134).

12. The battery device (1100) according to any one of claims 1-6, characterized in that, The refrigerant heat exchange component (1130) also has a plurality of mounting holes (1139), which are distributed in the heat exchange zone (1133) and avoid the refrigerant flow channel (1134).

13. The battery device (1100) according to any one of claims 1-6, characterized in that, The inlet / outlet area (1131), the main branching and collecting area (1132), and the heat exchange area (1133) are arranged sequentially in the first direction (X). The refrigerant flow channel (1134) in the inlet / outlet area (1131) includes a first flow channel (11311) and a second flow channel (11312). The flow direction of the refrigerant in the first flow channel (11311) is opposite to the flow direction of the refrigerant in the second flow channel (11312). The refrigerant flow channel (1134) in the main branching and collecting area (1132) is... 4) Includes a first flow channel (11321) and a second flow channel (11322). The refrigerant flow channel (1134) in the heat exchange zone (1133) includes an upstream flow channel (11337) and a downstream flow channel (11338) that are connected. The first flow channel (11311), the first flow channel (11321) and the upstream flow channel (11337) are connected in sequence. The second flow channel (11312), the second flow channel (11322) and the downstream flow channel (11338) are connected in sequence.

14. The battery device (1100) as claimed in claim 13, characterized in that, The refrigerant flow channel (1134) in the heat exchange zone (1133) includes a plurality of heat exchange sub-channels (11336) arranged in parallel. Each heat exchange sub-channel (11336) includes an upstream flow channel (11337) and a downstream flow channel (11338). The upstream flow channel (11337) in some of the heat exchange sub-channels (11336) is adjacent to and thermally compatible with the downstream flow channel (11338) in the adjacent heat exchange sub-channels (11336). The downstream flow channel (11338) in some of the heat exchange sub-channels (11336) is adjacent to and thermally compatible with the upstream flow channel (11337) in the adjacent heat exchange sub-channels (11336).

15. The battery device (1100) as claimed in claim 14, characterized in that, Multiple heat exchange sub-channels (11336) are arranged sequentially along the second direction (Y). The upstream channel (11337) and the downstream channel (11338) of the heat exchange sub-channels (11336) both extend along the first direction (X). The second direction (Y) is perpendicular to the first direction (X).

16. The battery device (1100) as claimed in claim 13, characterized in that, There is at least one first flow channel (11311) and multiple second flow channels (11312). All of the first flow channels (11311) are distributed between two adjacent second flow channels (11312).

17. The battery device (1100) as claimed in claim 16, characterized in that, The refrigerant in the first flow channel (11311) flows in the direction of entry into the main distribution and collection area (1132).

18. The battery device (1100) according to any one of claims 1-6, characterized in that, The housing assembly (1120) includes a housing body (1121) with an open opening, and the refrigerant heat exchange component (1130) is connected to the housing body (1121) and covers the open opening to form the receiving cavity (1124); the refrigerant heat exchange component (1130) is disposed opposite to the battery cell assembly (1110).

19. 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 1-18.

20. An electrical appliance, characterized in that, Includes a battery device (1100) as described in any one of claims 1-18, the battery device (1100) being used to store or provide electrical energy.

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