Battery unit, refrigerant heat exchanger, and electrical device

Abstract

The present application belongs to the field of battery production technology and provides a battery device, a refrigerant heat exchanger, and an electrical device. The battery device comprises a box body assembly, a battery cell assembly, and a refrigerant heat exchanger; the box body assembly has a receiving chamber; the battery cell assembly is received within the receiving chamber; the refrigerant heat exchanger comprises an inlet / outlet area having a refrigerant flow path, a main flow collection area, and a heat exchange area, wherein the main flow collection area is located between the inlet / outlet area and the heat exchange area, and the refrigerant flow path within the main flow collection area communicates with the inlet / outlet area and the refrigerant flow path within the main flow collection area; the inlet / outlet area is configured to allow refrigerant to flow into or out of the refrigerant flow path; the heat exchange area overlaps with the projection of the battery cell assembly in the refrigerant heat exchanger, and the refrigerant flow path within the heat exchange area is configured to exchange heat with the battery cell assembly; and both the main flow collection area and the inlet / outlet area are configured not to overlap with the projection of the battery cell assembly in the refrigerant heat exchanger. The present application aims to improve the temperature uniformity of the refrigerant heat exchanger.

Description

Technology Field

[0001] The present application claims priority to a Chinese patent application filed with the National Intellectual Property Administration on April 28, 2024, with application number 202420907842.4 and title of invention "heat exchanger, battery and electric device," the entire contents of which are incorporated by reference into the present application; and to an international application PCT / CN2025 / 078572 filed on February 21, 2025, with title "battery device, refrigerant heat exchanger and electric device," the entire contents of which are incorporated by reference into the present application.

[0002] The battery unit of a new energy vehicle emits more heat during the charging and discharging process, and the battery unit is generally equipped with a heat exchanger capable of exchanging heat with the battery cell assembly to implement cooling of the battery cell assembly through heat exchange. Background Technology

[0003] In the relevant technology, the flow path layout within the heat exchanger is chaotic, with functional areas capable of heat exchange and non-functional areas with lower heat exchange capacity intermingling. This affects the temperature uniformity of the heat exchanger itself, resulting in non-uniformity of the temperature distribution within the heat exchanger. Consequently, this affects the uniform heat exchange of the heat exchanger with respect to the battery cell assembly, and further impacts the performance and lifespan of the battery device. The problem to be solved

[0004] The embodiments of the present application aim to solve the technical problem of poor temperature uniformity of the refrigerant heat exchanger within the battery device by providing a battery device, a refrigerant heat exchanger, and an electric device. means of solving the problem

[0005] The technical solutions used in the embodiments of the present application are as follows:

[0006] According to a first aspect, the present application provides a battery device, which is

[0007] Box assembly having a receiving chamber;

[0008] A battery cell assembly accommodated within a receiving chamber;

[0009] A refrigerant heat exchanger comprising an inlet / outlet area having a refrigerant flow path, a main branch collection area, and a heat exchange area, wherein the main branch collection area is located between the inlet / outlet area and the heat exchange area, and the refrigerant flow path within the main branch collection area is in communication with the inlet / outlet area and the refrigerant flow path within the main branch collection area; the inlet / outlet area is configured to allow refrigerant to flow into or out of the refrigerant flow path; the heat exchange area overlaps with the projection of a battery cell assembly in the refrigerant heat exchanger, and the refrigerant flow path within the heat exchange area is configured to exchange heat with the battery cell assembly; and the main branch collection area and the inlet / outlet area are both configured not to overlap with the projection of the battery cell assembly in the refrigerant heat exchanger.

[0010] In this embodiment, the heat exchange area with a higher heat exchange capacity is installed so as to be separated from the main classification collection area and the inlet / outlet area, and the refrigerant flow paths within the main classification collection area and the inlet / outlet area cannot flow into the refrigerant flow path area within the heat exchange area. This allows for a more concentrated distribution of the refrigerant flow paths within the heat exchange area and simplifies the arrangement path of the refrigerant flow paths, which is advantageous for making the temperature distribution of the heat exchange area more uniform. Furthermore, this heat exchange area is configured to face the battery cell assembly to exchange heat with the battery cell assembly, which is advantageous for improving the uniform heat exchange capacity of the refrigerant heat exchanger for the battery cell assembly.

[0011] In one embodiment thereof, the heat exchange region includes a DC region and a rectification region, and the refrigerant flow path within the DC region is composed of a plurality of straight flow path structures installed spaced apart from a second direction, each straight flow path structure extending along a first direction; the refrigerant flow path within the rectification region is composed of a bent flow path structure, and the bent flow path structure communicates with the straight flow path structure; the second direction is perpendicular to the first direction; and the battery cell assembly is installed facing the DC region, or the battery cell assembly is installed facing both the DC region and the rectification region.

[0012] In this embodiment, the installation of straight flow path structures and bent flow path structures forms a DC region and a rectified region in the heat exchange area, and the temperature distribution of the DC region becomes more uniform, which is more advantageous for improving uniform heat exchange with the battery cell assembly when the DC region exchanges heat with the battery cell assembly.

[0013] In one embodiment thereof, the battery cell assembly comprises a plurality of battery cell groups arranged in a second direction, and each battery cell group comprises 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 straight flow path structures, and in the first direction, the battery cell group can cover a longer straight flow path structure, which is advantageous for increasing the corresponding area of ​​the battery cell assembly and the DC region, improving the heat exchange area, and further improving the heat exchange efficiency.

[0015] In one embodiment among them, the straight flow path structure has a first length in the first direction, and the bent flow path structure has a second length in the first direction, and the ratio of the second length to the first length is less than 0.1.

[0016] In this embodiment, the ratio of the first length of the bent flow path structure to the second length of the straight flow path structure is less than 0.1, thereby achieving the objective of controlling the extended length of the bent flow path structure, which is advantageous for improving the extended length of the straight flow path structure and improving the length and area of ​​the DC region, and thus is advantageous for improving heat exchange efficiency.

[0017] In one embodiment thereof, the rectification region is located at the edge of the heat exchange region, and / or, the rectification region is located between the DC region and the main junction condensation region.

[0018] In this embodiment, by installing the rectification region at the edge of the heat exchange region or between the DC region and the main junction collection region, the uniform heat release effect can be improved by corresponding to the battery cell at the edge location.

[0019] In one embodiment thereof, the rectification region further includes a sub-classification joining structure, and the sub-classification joining structure connects some bent flow path structures and some straight flow path structures.

[0020] In this embodiment, by adding a sub-classification joining structure, it is convenient for the flow paths used for reflux in a straight flow path structure to communicate and join with each other, and convenient for guiding and joining the refluxing refrigerant in a specific direction.

[0021] In one embodiment thereof, the heat exchange region has a third length in the first direction, the refrigerant heat exchange member has a fourth length in the first direction, and the ratio range of the third length to the fourth length is 0.6 or greater and less than 1.

[0022] In this embodiment, by controlling the ratio of the heat exchange area in the refrigerant heat exchange member to a range of 0.6 or more and less than 1, it is advantageous to have a larger ratio of the heat exchange area in the refrigerant heat exchange member, and to have a sufficient heat exchange area between the battery cell assembly and the refrigerant heat exchange member to exchange heat and improve heat exchange efficiency.

[0023] In one embodiment thereof, the heat exchange region has a heat exchange surface facing the battery cell assembly, and the refrigerant flow path within the heat exchange region is configured to face the heat exchange surface; and the ratio of the projected area of ​​the refrigerant flow path within the heat exchange region to the area of ​​the heat exchange surface is 0.4 or more and 0.8 or less.

[0024] In this embodiment, by reasonably controlling the ratio of the projected area of ​​the refrigerant flow path on the surface of the heat exchange area, a sufficient heat exchange area is ensured between the refrigerant and the battery cell, which not only reduces the risk of the refrigerant flow path becoming excessively dense or sparse, but is also advantageous for optimizing the heat exchange effect and is convenient for the design and manufacture of the refrigerant flow path.

[0025] In one embodiment among them, along the second direction, the spacing distance range between two adjacent straight flow path structures is 5 mm to 15 mm.

[0026] In this embodiment, a spacing of 5 mm to 15 mm not only allows the refrigerant to have sufficient flow space between straight flow path structures, but also allows adjacent straight flow path structures to effectively exchange heat with the battery cell assembly, thereby reducing the risk of insufficient heat exchange due to a spacing that is too large or excessive flow resistance due to a spacing that is too small.

[0027] In one embodiment among them, the width range of the refrigerant flow path is 6 mm to 15 mm.

[0028] In this embodiment, the flow path width of 6 mm to 15 mm can control the flow velocity, flow rate, flow resistance, and pressure drop of the refrigerant, thereby ensuring excellent flow conditions of the refrigerant within the refrigerant flow path and being advantageous for improving heat exchange efficiency, as well as avoiding increased costs or reduced thermal management performance caused by the refrigerant flow path being excessively wide or narrow.

[0029] In one embodiment thereof, the refrigerant heat exchanger also has a plurality of cavities inside, and each cavity is configured to be non-communicable to the refrigerant flow path.

[0030] In this embodiment, by installing a plurality of cavities, flow can be guided and air discharged during the welding process, which is advantageous for improving welding quality and weld sealing performance, and for improving the overall structural strength of the refrigerant heat exchanger.

[0031] In one embodiment thereof, the refrigerant heat exchanger also has a plurality of mounting holes, and the mounting holes are distributed in the heat exchange area to avoid the refrigerant flow path.

[0032] In this embodiment, by installing a mounting hole, it is convenient to connect and fix the refrigerant heat exchanger to another member through a locking member such as a bolt, thereby improving the convenience of connecting the refrigerant heat exchanger to another member.

[0033] In one embodiment thereof, an inlet / outlet area, a main classification collection area, and a heat exchange area are arranged sequentially in a first direction, and the refrigerant flow path within the inlet / outlet area includes a first flow direction path and a second flow direction path, and the refrigerant flow direction within the first flow direction path is opposite to the refrigerant flow direction within the second flow direction path; the refrigerant flow path within the main classification collection area includes a first path and a second path, and the refrigerant flow path within the heat exchange area includes an upstream path and a downstream path that are connected; the first flow direction path, the first path, and the upstream path are configured to be connected sequentially, and the second flow direction path, the second path, and the downstream path are configured to be connected sequentially.

[0034] In this embodiment, the arrangement of the entrance / exit area, the main classification collection area, and the heat exchange area is more regular, and the battery cell assembly is installed facing the heat exchange area, which is advantageous for implementing intensive heat exchange in a targeted manner and improving the uniformity of heat exchange.

[0035] In one embodiment thereof, the refrigerant flow path within the heat exchange region includes a plurality of heat exchange sub-flow paths installed in parallel, and each heat exchange sub-flow path includes an upstream flow path and a downstream flow path, and some of the upstream flow paths among the heat exchange sub-flow paths are adjacent to and thermally coupled with the downstream flow path among the adjacent heat exchange sub-flow paths, and some of the downstream flow paths among the heat exchange sub-flow paths are adjacent to and thermally coupled with the upstream flow path among the adjacent heat exchange sub-flow paths.

[0036] In this embodiment, the upstream and downstream channels among the two heat exchange sub-channels are configured adjacently so that the low temperature of the upstream channel offsets the high temperature of the downstream channel, thereby reducing the temperature of the heat exchange surface area corresponding to the downstream channel, so that an overheated area is not easily formed, and the area of ​​the overheated area is relatively reduced, which is advantageous for improving the heat exchange efficiency for the battery cell assembly and improving the heat exchange uniformity for the battery cell assembly by making the temperature distribution of the refrigerant heat exchange member on the heat exchange surface more uniform.

[0037] In one embodiment thereof, a plurality of heat exchange sub-flow paths are installed sequentially along a second direction, and the upstream and downstream flow paths among the heat exchange sub-flow paths are both installed to extend along a first direction, and the second direction is perpendicular to the first direction.

[0038] In this embodiment, the upstream and downstream channels are extended in the first direction (X) and installed adjacently, which is advantageous for increasing the length of the adjacent area between the upstream and downstream channels, increasing the area of ​​the adjacent heat exchange, and increasing the heat exchange efficiency.

[0039] In one embodiment thereof, at least one first flow direction channel is installed, and a plurality of second flow direction channels are installed, and all first flow direction channels are distributed between two adjacent second flow direction channels.

[0040] In this embodiment, all first flow direction channels are concentrated between two second flow direction channels, thereby reducing mounting space and complexity, making it convenient for the concentrated transport of refrigerant and convenient for a concentrated, close channel layout.

[0041] In one embodiment among them, the flow direction of the refrigerant in the first flow direction channel is the inflow direction flowing into the main classification collection area.

[0042] In this embodiment, the above-described design is advantageous for positioning the refrigerant layout in the inflow direction in the central region of the refrigerant heat exchanger, and is advantageous for improving the flow rate during refrigerant inflow and improving heat exchange efficiency.

[0043] In one embodiment thereof, the box body assembly includes a box body having an open opening, and a refrigerant heat exchanger is connected to the box body and covers the open opening to form a receiving chamber; the refrigerant heat exchanger is installed opposite the battery cell assembly.

[0044] In this embodiment, the refrigerant heat exchanger 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 and can also be used to support the battery cell assembly, which is advantageous for simplifying the structure of the outer box body and reducing the weight of the battery device.

[0045] According to a second embodiment, the present application provides a refrigerant heat exchanger comprising a refrigerant heat exchanger in a battery device according to any one of the above-described elements.

[0046] According to a third aspect, the present application provides an electric device comprising a battery device according to any one of the above, wherein the battery device is used to store or provide electrical energy.

[0047] The foregoing description is merely an overview of the technical solution of the present application. To understand the technical solution of the present application more clearly, it may be implemented in accordance with the contents of the specification. Furthermore, to make the foregoing description of the present application and other purposes, features, and advantages more clear and easy to understand, specific examples for implementing the invention of the present application are provided below. Brief explanation of the drawing

[0048] To more clearly explain the technical solution of the embodiments of the present application, the following briefly introduces the drawings to be used in the embodiments of the present application or in the description of the prior art. It is obvious that the drawings described below are merely some embodiments of the present application, and that a person skilled in the art can obtain other drawings from these drawings without striving to create an inventive step. FIG. 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application. FIG. 2 is a schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application. FIG. 3 is a schematic diagram of the disassembled structure of a refrigerant heat exchanger in a battery device provided in some embodiments of the present application. FIG. 4 is a schematic diagram of the distribution structure of a refrigerant flow path inside a refrigerant heat exchanger in a battery device provided in some embodiments of the present application. FIG. 5 is one of the schematic diagrams of the distribution structure of a refrigerant flow path within a heat exchange region within a refrigerant heat exchange member provided in some embodiments of the present application. FIG. 6 is another schematic diagram of the distribution structure of a refrigerant flow path within a heat exchange region within a refrigerant heat exchange member provided in some embodiments of the present application. FIG. 7 is one of the diagrams showing the relative positional relationship between a refrigerant flow path and a battery cell assembly within a refrigerant heat exchanger in a battery device provided in some embodiments of the present application. FIG. 8 is another diagram showing the relative positional relationship between a refrigerant flow path and a battery cell assembly within a refrigerant heat exchanger in a battery device provided in some embodiments of the present application. FIG. 9 is a schematic diagram of the structure of the corresponding distribution of the heat exchange surface and the first surface in a refrigerant heat exchange member provided in some embodiments of the present application. FIG. 10 is a schematic diagram of the refrigerant flow path distribution area within the heat exchange region within the refrigerant heat exchange member provided in some embodiments of the present application. FIG. 11 is a schematic diagram of the distribution structure of a refrigerant flow path within a main classification collection area within a refrigerant heat exchanger provided in some embodiments of the present application. FIG. 12 is one of the schematic diagrams of the distribution structure of a refrigerant flow path within an inlet / outlet area within a refrigerant heat exchanger provided in some embodiments of the present application. FIG. 13 is another schematic diagram of the distribution structure of a refrigerant flow path within an inlet / outlet area within a refrigerant heat exchanger provided in some embodiments of the present application. FIG. 14 is a schematic diagram of the structure of the mounting hole distribution within a refrigerant heat exchanger provided in some embodiments of the present application. FIG. 15 is a schematic diagram of the temperature distribution of a refrigerant flow path within a refrigerant heat exchanger in a battery device provided in some embodiments of the present application. Specific details for implementing the invention

[0049] Hereinafter, embodiments of the technical solution of the present application are described in detail with reference to the drawings. The following embodiments are used to more clearly explain the technical solution of the present application and are therefore used only as examples; they do not limit the scope of the claims of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by those skilled in the art to which this application pertains; the terms used in this application are intended only for the purpose of describing specific embodiments and are not intended to limit this application; and the terms "comprising" and "comprising," and any variations thereof, in the specification, claims, and brief description of the drawings of this application are intended to cover non-exclusive inclusion.

[0051] In the description of the embodiments of this application, technical terms such as "first," "second," etc., are used solely to distinguish different objects and should not be understood as indicating or implying relative importance, or implying the quantity of the indicated technical features, a specified order, or a secondary relationship with the main one. In the description of the embodiments of this application, the meaning of "plural" is two or more unless otherwise explicitly and specifically limited.

[0052] The term "Examples" as used herein means that specific features, structures, or properties described in combination with the Examples may be included in at least one Example of this Application. The appearance of such phrases in various places within the specification does not necessarily refer to the same Example, nor are they independent or alternative Examples mutually exclusive from other Examples. Those skilled in the art understand, expressly or impliedly, that the Examples described herein may be combined with other Examples.

[0053] In the description of the embodiments of this application, the term "and / or" is merely an association describing related objects and indicates that there may be three relationships; for example, A and / or B may represent three cases where A exists alone, A and B exist simultaneously, or B exists alone. Additionally, the character " / " in the text generally indicates that the related objects are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the term “plural” refers to two or more (including two), likewise “plural group” refers to two or more groups (including two groups), and “plural tablet” refers to two or more tablets (including two tablets).

[0055] In the description of the embodiments of the present application, directional or positional relationships indicated by technical terms such as "center," "vertical," "horizontal," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc., are merely intended to facilitate and simplify the description of the embodiments of the present application and do not indicate or imply that the mentioned device or element must have a specific direction or be configured and operated in a specific direction; therefore, they should not be understood as a limitation on the embodiments of the present application.

[0056] In the description of the embodiments of this application, unless otherwise explicitly stated or limited, technical terms such as “mounting,” “connecting,” “connecting,” and “fixing” should be understood in a broad sense and may, for example, be a fixed connection, a detachable connection, or an integrated connection; may be a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, an internal connection of two elements, or an interactive relationship between two elements. A person skilled in the art will understand the specific meaning of the aforementioned terms in the embodiments of this application according to the specific circumstances.

[0057] In recent years, new energy vehicles have made rapid progress, and their market share is increasing. Rapid and efficient energy replenishment is a challenge that the new energy vehicle industry must urgently address.

[0058] The battery unit of a new energy vehicle emits more heat during the charging and discharging process, and the battery unit is generally equipped with a refrigerant heat exchanger capable of exchanging heat with the battery cell assembly, thereby implementing cooling of the battery cell assembly through heat exchange.

[0059] Rapid charging is a key solution for realizing the rapid energy replenishment of new energy vehicles, but it faces many challenges during implementation. Furthermore, battery cell assemblies generate a significant amount of heat during rapid charging, causing the internal temperature of the battery unit to rise rapidly. During rapid charging, non-uniform heat exchange issues regarding the refrigerant heat exchanger within the battery cell assembly occur more easily. This leads to a rapid increase in the temperature of some cell assemblies and the accumulation of large amounts of heat within the battery unit, affecting its performance and lifespan and potentially posing greater risks during operation. Therefore, ensuring uniform heat dissipation, guaranteeing rapid heat exchange, and improving the consistency of internal temperature distribution are critical tasks for battery thermal management.

[0060] Specifically, battery devices generate heat during the charging and discharging process; if this heat is not effectively dissipated, it can lead to performance degradation and a shortened lifespan. Furthermore, high temperatures accelerate chemical reactions within the battery device, increase internal resistance, reduce energy density, and, in severe cases, cause thermal runaway. Therefore, the battery cell assembly is cooled by installing a refrigerant heat exchanger in the battery device.

[0061] Regarding the non-uniform temperature distribution and localized high temperature issues within the battery device, research has shown that in the case of a refrigerant heat exchanger utilizing refrigerant heat exchange, numerous refrigerant flow paths are installed within the refrigerant heat exchanger. These refrigerant flow paths form functional and non-functional regions within the refrigerant heat exchanger. Here, the refrigerant within the flow paths distributed within the functional region has a higher heat exchange capacity and serves as the primary heat exchange path; conversely, the refrigerant within the flow paths distributed within the non-functional region has a lower heat exchange capacity. For example, the flow paths at the inlet and outlet locations are non-functional paths, and the flow paths primarily serving as guides and sorters are also non-functional paths. However, in the relevant technology, the flow path layout within the refrigerant heat exchanger is chaotic, and the flow paths of functional areas with heat exchange capacity and non-functional areas with lower heat exchange capacity are mixed, affecting the temperature uniformity of the heat exchanger itself and causing non-uniformity in the temperature distribution of the heat exchanger itself. This affects the uniform heat exchange of the heat exchanger to the battery cell assembly and further affects the performance and lifespan of the battery device.

[0062] Specifically, in the relevant technology, for example, a dividing channel primarily serving as a dividing channel is inserted between heat exchange channels intended for heat exchange. Consequently, the dividing channel inevitably forms a specific occupied space and area within the functional region corresponding to the heat exchange channel, causing the functional region corresponding to the heat exchange channel to become dispersed; that is, non-functional regions are mixed within the functional region of the refrigerant heat exchanger, and the distribution of the functional region becomes more scattered. In the case of the refrigerant heat exchanger itself, the refrigerant flow path within the intersecting dividing and heat exchange channels is complex, and pressure loss increases, thereby reducing refrigerant cycle efficiency. Furthermore, high-temperature and low-temperature regions intersect and are irregularly distributed, resulting in a non-uniform temperature distribution within the refrigerant heat exchanger. This affects the uniform heat exchange of the heat exchanger with respect to the battery cell assembly, and further impacts the performance and lifespan of the battery device.

[0063] Accordingly, the present application provides a battery device, wherein a refrigerant heat exchanger is divided into an inlet / outlet area, a main stream collection area, and a heat exchange area, and the main stream collection area is positioned between the inlet / outlet area and the heat exchange area so that the heat exchange area, which has a higher heat exchange capacity, is installed to be separated from both the main stream collection area and the inlet / outlet area. Furthermore, since the refrigerant flow paths within the main stream collection area and the inlet / outlet area cannot flow into the refrigerant flow path area within the heat exchange area, the distribution of the refrigerant flow path within the heat exchange area can be concentrated and the arrangement path of the refrigerant flow path can be simplified, which is advantageous for making the temperature distribution of the heat exchange area more uniform. Additionally, this heat exchange area is configured to face the battery cell assembly to exchange heat with the battery cell assembly, which is advantageous for improving the uniform heat exchange capacity of the refrigerant heat exchanger with respect to the battery cell assembly.

[0064] Specifically, referring to FIG. 2, an embodiment of the present application provides a battery apparatus, wherein the battery apparatus (1100) may include one or more battery cell assemblies (1110) for providing voltage and capacity, and the battery cell assembly may include a plurality of battery cells (1112), and the plurality of battery cells are connected in series, parallel, or mixed connections through a bus member. The battery apparatus (1100) may be a battery pack, and the battery pack generally includes a box assembly (1120) and one or more battery cell assemblies (1110), and the battery cell assembly (1110) is accommodated within the box assembly (1120).

[0065] The battery device (1100) disclosed in the embodiments of the present application may be used in various energy storage devices and energy storage systems that use the battery device (1100) as a power source or the battery device (1100) as an energy storage element. The electric device may be a mobile phone, portable device, laptop computer, electric toy, electric tool, battery car, vehicle, ship, spacecraft, etc., but is not limited thereto. Here, the electric toy may include stationary or mobile electric toys such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the spacecraft may include airplanes, rockets, spacecraft, spacecraft, etc.

[0066] For convenience of explanation, the following embodiments are described by taking the case where an electric device according to one embodiment of the present application is a vehicle (1000) as an example.

[0067] Referring to FIG. 1, FIG. 1 is a schematic diagram of the structure of a vehicle (1000) provided in some embodiments of the present application. The vehicle (1000) may be a fuel vehicle, a natural gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or a range-extended vehicle, etc. A battery device (1100) is installed inside the vehicle (1000), and the battery device (1100) may be installed in the bottom, head, or rear portion of the vehicle (1000). The battery device (1100) may be used to supply power to the vehicle (1000), and, for example, the battery device (1100) may be used as the working power source for the vehicle (1000). The vehicle (1000) may further include a controller (1200) and a motor (1300), and the controller (1200) is used to control the battery device (1100) to supply power to the motor (1300), for example, to meet the demand for operating power usage during starting, navigation, and driving of the vehicle (1000).

[0068] In some embodiments of the present application, the battery device (1100) can be used not only as an operating power source for the vehicle (1000), but also as a driving power source for the vehicle (1000), thereby providing driving power to the vehicle (1000) by replacing or partially replacing fuel or natural gas.

[0069] Referring to FIG. 2, FIG. 2 is an exploded view of a battery device (1100) provided in some embodiments of the present application. In one embodiment, the battery device (1100) comprises a box assembly (1120) and a battery cell assembly (1110), a receiving chamber (1124) is formed within the box assembly (1120), and the battery cell assembly (1110) is received within the receiving chamber (1124). The battery cell assembly (1110) is generally formed by arranging a plurality of battery cells (1112), or the battery cell assembly (1110) may be a battery module, and the battery module is arranged and fixed with a plurality of battery cells (1112) to form a single independent module. Here, the box assembly (1120) is intended to provide the receiving chamber (1124) to the battery cell assembly (1110), and the box assembly (1120) may use various structures.

[0070] A battery cell (1112) refers to the smallest unit constituting the battery device (1100). Here, each battery cell (1112) may be a secondary battery cell or a primary battery cell; it may be a lithium-sulfur battery cell, a sodium-ion battery cell, or a magnesium-ion battery cell, but is not limited thereto. The battery cell (1112) may be a cylinder, a flat body, a rectangular prism, or other shapes.

[0071] According to some embodiments of the present application, with reference to FIGS. 2 through 7, embodiments of the present application provide a battery device (1100), wherein the battery device (1100) comprises a box assembly (1120), a battery cell assembly (1110), and a refrigerant heat exchanger (1130); wherein the box assembly (1120) has a receiving chamber (1124); and the battery cell assembly (1110) is received within the receiving chamber (1124); A refrigerant heat exchanger (1130) comprises an inlet / outlet area (1131) having a refrigerant flow path (1134), a main flow collection area (1132), and a heat exchange area (1133), wherein the main flow collection area (1132) is located between the inlet / outlet area (1131) and the heat exchange area (1133), and the refrigerant flow path (1134) within the main flow collection area (1132) communicates with the inlet / outlet area (1131) and the refrigerant flow path (1134) within the main flow collection area (1132); and the inlet / outlet area (1131) is configured to allow refrigerant to flow into or out from the refrigerant flow path (1134); The heat exchange area (1133) overlaps with the projection of the battery cell assembly (1110) in the refrigerant heat exchange member (1130), and the refrigerant flow path (1134) within the heat exchange area (1133) is configured to exchange heat with the battery cell assembly (1110); and the main classification collection area (1132) and the inlet / outlet area (1131) are both configured not to overlap with the projection of the battery cell assembly (1110) in the refrigerant heat exchange member (1130).

[0072] Specifically, referring to FIGS. 2 and FIGS. 7, the battery cell assembly (1110) includes one or more battery cells (1112), and since the refrigerant heat exchanger (1130) must exchange heat with the battery cell assembly (1110), the refrigerant heat exchanger (1130) must be installed in close proximity to the battery cell assembly (1110), or the refrigerant heat exchanger (1130) must be in direct contact with or in contact with the battery cell assembly (1110) to improve the heat exchange effect. When exchanging heat between the refrigerant heat exchanger (1130) and the battery cell assembly (1110), in order to improve the heat exchange effect, a larger heat exchange area must be formed between the refrigerant heat exchanger (1130) and the battery cell (1112), so a heat exchange surface (11339) that is close to or in contact with the surface of the battery cell (1112) is formed on the refrigerant heat exchanger (1130).

[0073] The surface of the battery cell (1112) that is in close contact with or in contact with the heat exchange surface (11339) may be the bottom surface of the battery cell (1112) or the side surface of the battery cell (1112). For example, when the battery device (1100) is arranged horizontally, the surface of the lower part of the battery cell (1112) is the bottom surface, and the surface along the vertical direction of the battery cell (1112) is the side surface. In this embodiment, the heat exchange surface (11339) of the refrigerant heat exchange member (1130) may be in contact with or close to the bottom surface or side surface of the battery cell (1112). That is, the refrigerant heat exchange member (1130) may be located at the bottom of the battery cell assembly (1110) and may be located at the side of the battery cell assembly (1110). The refrigerant heat exchange member (1130) located at the bottom of the battery cell assembly (1110) may also generally be referred to as a heat exchange bottom plate or a cooling bottom plate.

[0074] For convenience of explanation, the following embodiments are described by way of example in which an electric device (1100) according to one embodiment of the present application is arranged horizontally and a refrigerant heat exchanger (1130) is located at the bottom of a battery cell assembly (1110).

[0075] In the case of the refrigerant heat exchanger (1130), with reference to FIG. 4, the refrigerant heat exchanger (1130) may include at least three parts, each of which is an inlet / outlet area (1131), a main flow collection area (1132), and a heat exchange area (1133), and a refrigerant flow path (1134) is distributed within the inlet / outlet area (1131), the main flow collection area (1132), and the heat exchange area (1133), and is used to flow refrigerant within the refrigerant flow path (1134).

[0076] Here, it can be understood that the refrigerant flow path (1134) within the inlet / outlet area (1131) serves to introduce and discharge refrigerant, and has at least two flow paths (1134) within the inlet / outlet area (1131), one refrigerant flow path (1134) is used to introduce refrigerant, and one refrigerant flow path (1134) is used to discharge refrigerant. This inlet / outlet area (1131) is configured so as not to overlap with the projection of the battery cell assembly (1110) in the refrigerant heat exchange member (1130), and here, it can be understood that not overlapping means that the refrigerant flow path (1134) within the inlet / outlet area (1131) is installed to avoid the battery cell assembly (1110) in the projection direction, that is, the battery cell assembly (1110) does not face the refrigerant flow path (1134) within the inlet / outlet area (1131).

[0077] Here, it can be understood that the refrigerant flow path (1134) within the main division collection area (1132) serves as a division and joining area, and the main division collection area (1132) includes a plurality of refrigerant flow paths (1134), where some of the plurality of refrigerant flow paths (1134) within the main division collection area (1132) are used for division, and the divided refrigerant flow path (1134) in this part may be in communication with the refrigerant flow path (1134) within the inlet / outlet area (1131) for introducing refrigerant; and the other refrigerant flow path (1134) within the main division collection area (1132) is used for joining, and the refrigerant flow path (1134) of the joining area in this part may be in communication with the refrigerant flow path (1134) within the inlet / outlet area (1131) for discharging refrigerant. This main classification collection area (1132) is configured so as not to overlap with the projection of the battery cell assembly (1110) in the refrigerant heat exchanger (1130), wherein, the non-overlapping means that, in the projection direction, the refrigerant flow path (1134) within the main classification collection area (1132) is installed to avoid the battery cell assembly (1110), that is, the battery cell assembly (1110) does not face the refrigerant flow path (1134) within the main classification collection area (1132).

[0078] In the case of the heat exchange area (1133), since the heat exchange area (1133) is primarily used to exchange heat with the battery cell assembly (1110), the heat exchange area (1133) must be installed facing the battery cell assembly (1110), that is, the heat exchange area (1133) must overlap with the projection of the battery cell assembly (1110) in the refrigerant heat exchange member (1130), and the refrigerant flow path (1134) within the heat exchange area (1133) is configured to exchange heat with the battery cell assembly (1110).

[0079] In the case of the refrigerant flow path (1134), referring to FIG. 4, the refrigerant flow path (1134) may be a porous structure located inside the refrigerant heat exchange member (1130), for example, the main heat exchange member (1130) is plate-shaped, and a through-hole structure or cavity structure having a certain extension length and extension path is installed within the plate of the refrigerant heat exchange member (1130), and this through-hole structure or cavity structure forms the refrigerant flow path (1134). The refrigerant heat exchange member (1130) may use an integrally molded structure, and the refrigerant flow path (1134) may be manufactured by an air-assisted or water-assisted molding method; Alternatively, the refrigerant heat exchanger (1130) may use a combination molding method, for example, the refrigerant heat exchanger (1130) may include a first sub-member (1136) and a second sub-member (1137), and a groove structure having a preset extension length and extension shape is formed in the second sub-member (1137), and the groove structure may be manufactured by stamping, and the first sub-member (1136) and the second sub-member (1137) are connected in a fixed or detachable manner, and the groove opening of the groove structure is closed to further form a through hole structure or a cavity structure, that is, to form a refrigerant flow path (1134). The refrigerant flow path (1134) within the heat exchange area (1133) must be installed close to the heat exchange surface (11339), and the extension path of the refrigerant flow path (1134) may be parallel to the heat exchange surface (11339) to increase the heat exchange effect.

[0080] For example, the first sub-member (1136) may be an upper plate, and the second sub-member (1137) may be a lower plate, and the refrigerant passage (1134) is formed on the lower plate by stamping. The first sub-member (1136) and the second sub-member (1137) may be welded by brazing, and the weld area may serve to engage with heat transfer.

[0081] Generally, the inlet / outlet area (1131) and the main classification collection area (1132) can be collectively referred to as non-functional areas, and the heat exchange area (1133) can be referred to as functional areas. The functional area is mainly used to exchange heat with the battery cell assembly (1110), and the non-functional area can be used to input, output, and classify refrigerant, and refrigerant flow paths (1134) are distributed within both the functional area and the non-functional area.

[0082] Considering the different characteristics of each function of the inlet / outlet area (1131), the main classification collection area (1132), and the heat exchange area (1133), for example, the refrigerant flow path (1134) within the inlet / outlet area (1131) mainly serves to introduce and discharge refrigerant, and the range of placement therein is not too large, and the extension trajectory of the refrigerant flow path (1134) within the inlet / outlet area (1131) is variable, it can be seen that the temperature distribution of this inlet / outlet area (1131) is non-uniform and is not suitable for exchanging heat with the battery cell assembly (1110), so the battery cell assembly (1110) is designed to avoid this inlet / outlet area (1131) so that the inlet / outlet area (1131) does not overlap with the projection of the battery cell assembly (1110) in the refrigerant heat exchange member (1130). Also, for example, the refrigerant flow path (1134) within the main classification collection area (1132) mainly serves as a classification and confluence area, and its arrangement range is not too large, and the extension trajectory of the refrigerant flow path (1134) within the main classification collection area (1132) is more diverse, and the problem of uneven temperature distribution within this heat exchange area (1133) occurs frequently, making it unsuitable for exchanging heat with the battery cell assembly (1110), otherwise it causes uneven heat exchange problems with the battery cell assembly (1110), so the battery cell assembly (1110) is designed to avoid this main classification collection area (1132) so that the main classification collection area (1132) does not overlap with the projection of the refrigerant heat exchange member (1130) of the battery cell assembly (1110). In the refrigerant heat exchange member (1130), the arrangement range of the heat exchange area (1133) is larger, and the refrigerant flow path (1134) within this area can be uniformly arranged, so that the heat exchange area (1133) is installed facing the battery cell assembly (1110), making it more advantageous to achieve uniform heat exchange with respect to the battery cell assembly (1110).

[0083] The main classification 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 main classification collection area are positioned on one side of the heat exchange area (1133), the entire heat exchange area (1133) is more regular, the refrigerant flow path (1134) within the inlet / outlet area (1131) and the main classification collection area (1132) does not extend into the spaced-out space of the refrigerant flow path (1134) within the heat exchange area (1133), the refrigerant flow path (1134) within the heat exchange area (1133) is not dispersed by the refrigerant flow path (1134) of the inlet / outlet area (1131) and the main classification collection area (1132), and the arrangement of the refrigerant flow path (1134) within the heat exchange area (1133) is more regular and concentrated, which is advantageous for achieving uniformity of the self-temperature distribution, further Achieve uniform heat exchange of the battery cell assembly (1110).

[0084] In this embodiment, the refrigerant heat exchanger (1130) is divided into an inlet / outlet area (1131), a main flow collection area (1132), and a heat exchange area (1133). The main flow collection area (1132) is positioned between the inlet / outlet area (1131) and the heat exchange area (1133), so that the heat exchange area (1133), which has a higher heat exchange capacity, is installed to be separated from both the main flow collection area (1132) and the inlet / outlet area (1131). The refrigerant flow paths (1134) within the main flow collection area (1132) and the inlet / outlet area (1131) cannot all flow into the area of ​​the refrigerant flow paths (1134) within the heat exchange area (1133), thereby making the distribution of the refrigerant flow paths (1134) within the heat exchange area (1133) more concentrated and making the arrangement path of the refrigerant flow paths (1134) simpler, so that the temperature distribution of the heat exchange area (1133) is further It is advantageous for uniformity, and this heat exchange area (1133) is configured to face the battery cell assembly (1110) to exchange heat with the battery cell assembly (1110), which is advantageous for improving the uniform heat exchange capability of the refrigerant heat exchange member (1130) with respect to the battery cell assembly (1110).

[0085] In some embodiments, referring to FIG. 5, the heat exchange region (1133) includes a DC region (11331) and a rectification region (11332), and the refrigerant flow path (1134) in the DC region (11331) is composed of a plurality of straight flow path structures (11333) installed spaced apart from the second direction (Y), each straight flow path structure (11333) extends along the first direction (X); the refrigerant flow path (1134) in the rectification region (11332) is composed of a bent flow path structure (11334), and the bent flow path structure (11334) communicates with the straight flow path structure (11333); and the second direction (Y) is perpendicular to the first direction (X); The battery cell assembly (1110) is installed facing the DC region (11331), or the battery cell assembly (1110) is installed facing both the DC region (11331) and the rectification region (11332).

[0086] Specifically, a plurality of straight flow path structures (11333) are included within a DC region (11331), and the flow path extension trajectory of each straight flow path structure (11333) may be a straight line, and each straight flow path structure (11333) is installed in a spaced-apart parallel manner, and the refrigerant within the DC region (11331) may be considered to flow along a straight direction, and each straight flow path structure (11333) may be considered as a straight through-hole structure installed inside a refrigerant heat exchange member (1130). Each straight flow path structure (11333) is extended along a first direction (X), and the plurality of straight flow path structures (11333) are spaced apart from a second direction (Y), and the second direction (Y) is a direction perpendicular to the first direction (X). The first direction (X) can be considered as the length direction of the refrigerant heat exchange member (1130) (or heat exchange surface (11339)), and the second direction (Y) can be considered as the width direction of the refrigerant heat exchange member (1130).

[0087] A rectification area (11332) is used to change the flow direction of the refrigerant, and a bent flow path structure (11334) connected to a straight flow path structure (11333) is installed in the rectification area (11332), for example, one end of two adjacent straight flow path structures (11333) is connected through one bent flow path structure (11334), and the bent flow path may be arc-shaped or the bent flow path may be a U-shaped bend.

[0088] In the case of the placement location of the battery cell assembly (1110), the refrigerant flows more stably in the straight flow path structure (11333) and the bent flow path structure (11334) changes the flow of the refrigerant. Therefore, at the location of the bent flow path structure (11334), the refrigerant has high flow resistance and unstable flow velocity, so the temperature distribution in the rectification area (11332) becomes uneven and unstable, so the battery cell assembly (1110) can be made to avoid this rectification area (11332). In the case of a straight flow path structure (11333), the length of the straight flow path structure (11333) extending along the straight line is longer, and the refrigerant flow within the straight flow path structure (11333) is more stable, and the flow resistance is relatively small and the flow velocity is stable. Therefore, it can be seen that the temperature distribution in the DC region (11331) corresponding to the straight flow path structure (11333) is more uniform and stable. Thus, the battery cell assembly (1110) can be installed facing the DC region (11331), that is, the DC region (11331) in the heat exchange region (1133) overlaps with the projection of the battery cell assembly (1110) in the refrigerant heat exchange member (1130), thereby improving the uniform heat exchange capability of the refrigerant heat exchange member (1130) with respect to the battery cell assembly (1110).

[0089] Of course, considering that the temperature of the battery cell assembly (1110) near the end position in the first direction (X) is relatively lower than the temperature of the battery cell (1112) near the center, the rectification area (11332) can be installed at the edge position of the heat exchange surface (11339), and the battery cell (1112) within the battery cell assembly (1110) near the end position can be installed facing the rectification area (11332), which is advantageous for improving the total heat exchange area of ​​the heat exchange area (1133) for the battery cell assembly (1110) and reducing energy loss.

[0090] In this embodiment, the installation of a straight flow path structure (11333) and a bent flow path structure (11334) forms a DC region (11331) and a rectification region (11332) in the heat exchange region (1133), and the temperature distribution of the DC region (11331) becomes more uniform, which is more advantageous for improving uniform heat exchange with the battery cell assembly (1110) when the DC region (11331) exchanges heat with the battery cell assembly (1110).

[0091] In some embodiments, with reference to FIGS. 7 and FIGS. 8, a battery cell assembly (1110) comprises a plurality of battery cell groups (1111) arranged in a second direction (Y), and each battery cell group (1111) comprises a plurality of battery cells (1112) stacked along a first direction (X).

[0092] Specifically, a battery cell group (1111) can be considered as a single battery module within a battery cell assembly (1110), and considering that a straight flow path structure (11333) is installed to extend in a first direction (X), a plurality of battery cells (1112) within the battery cell group (1111) are stacked and arranged in the first direction (X), and a plurality of battery cell groups (1111) are arranged in a second direction (Y), so that the arrangement direction of the plurality of battery cells (1112) within each battery cell group (1111) is aligned and matched with the extension direction of the straight flow path structure (11333), thereby having a larger corresponding area between the straight flow path structure (11333) (i.e., the DC region (11331)) and the battery cell group (1111), i.e., having a larger heat exchange area.

[0093] The straight flow path structure (11333) allows the refrigerant to pass through each battery cell (1112) sequentially, which is advantageous for reducing local overheating or undercooling of the battery cell group (1111), thereby making the temperature distribution of the entire battery cell group more uniform and reducing performance discrepancies of the battery cell group (1111) due to temperature differences, and the direct current region (11331) has a sufficient length to sufficiently exchange heat with each battery cell (1112) within the battery cell group (1111), thereby improving heat exchange efficiency and optimizing the performance of the refrigerant heat exchange member (1130).

[0094] In this embodiment, in the second direction (Y), the battery cell group (1111) can cover a larger number of straight flow path structures (11333), and in the first direction (X), the battery cell group (1111) can cover a longer straight flow path structure (11333), which is advantageous for increasing the corresponding area between the battery cell assembly (1110) and the DC region (11331), improving the heat exchange area, and further improving the heat exchange efficiency.

[0095] In some embodiments, with reference to FIG. 5, the straight flow path structure (11333) has a first length (L1) in the first direction (X), and the bent flow path structure (11334) has a second length (L2) in the first direction (X), and the ratio of the second length (L2) to the first length (L1) is less than 0.1.

[0096] Since the straight flow channel structure (11333) extends along the first direction (X), it can be seen that the first length (L1) is the extended length of the straight flow channel structure (11333). In the case of the bent flow channel structure (11334), the second length (L2) should be understood as the projected length of the bent flow channel structure (11334) in a plane parallel to the first direction (X).

[0097] By making the ratio of the second length (L2) to the first length (L1) less than 0.1, the length in the first direction (X) of the bent flow path structure (11334) is made relatively short. Since the flow resistance of the refrigerant within the bent flow path structure (11334) is high and the energy loss is high, the extended length of the bent flow path structure (11334) must be made as short as possible, and in comparison, the extended length of the straight flow path structure (11333) can be relatively increased. In this way, the flow resistance and energy loss of the refrigerant in the rectification region (11332) are reduced, ensuring a sufficient length for sufficient heat exchange of the refrigerant in the direct current region (11331), thereby improving heat exchange efficiency and optimizing the performance of the refrigerant heat exchange member (1130).

[0098] It should be noted that when a bending flow path structure (11334) is installed at different locations, the second length (L2) should be understood as the sum of the lengths in the first direction (X) of a plurality of bending flow path structures (11334) at different locations in the ratio of the second length (L2) to the first length (L1).

[0099] In this embodiment, the ratio of the first length (L1) of the bent flow path structure (11334) to the second length (L2) of the straight flow path structure (11333) is less than 0.1, thereby achieving the purpose of controlling the extended length of the bent flow path structure (11334), which is advantageous for improving the extended length of the straight flow path structure (11333) and improving the length and area of ​​the DC region (11331), and thus is advantageous for improving heat exchange efficiency.

[0100] In some embodiments, with reference to FIGS. 4 and 5, the rectification region (11332) is located at the edge of the heat exchange region (1133), and / or, the rectification region (11332) is located between the DC region (11331) and the main dividing condensation region (1132).

[0101] Since the heat exchange area (1133) must be installed facing the battery cell assembly (1110), the temperature of the battery cell (1112) located in the central area of ​​the battery cell assembly (1110) is relatively high, and the temperature of the battery cell (1112) located at the edge position is relatively low; however, since the rectification area (11332) has a relatively weak heat exchange capacity compared to the DC area (11331), the rectification area (11332) can be positioned facing the battery cell (1112) at the edge position, so the rectification area (11332) can be positioned at the edge position of the heat exchange area (1133).

[0102] For example, it can be seen that each straight flow path structure (11333) extends along the first direction (X), and a plurality of straight flow path structures (11333) are spaced apart in the second direction (Y), so that the DC flow path has two ends, one end of which must be connected to a bent flow path structure (11334), thereby positioning the rectification area (11332) at the end position of the heat exchange area (1133), i.e., the edge position. The battery cell (1112) located at one end of each battery cell group (1111) is installed facing the rectification area (11332) at this edge position.

[0103] In addition, for example, it can be seen that two straightening regions (11332) are installed, and based on the example described above, three or more straight flow path structures (11333) are installed, and both ends of the straight flow path structures (11333) along the first direction (X) must be connected to the bent flow path structures (11334), and that the two straightening regions (11332) are each positioned to correspond to the positions of both ends of the DC region (11331), and that one end of the straight flow path structure (11333) is connected to the refrigerant flow path (1134) within the main branch collection region (1132), that is, since one side of the DC region (11331) is installed close to the main branch collection region (1132), it can be seen that the straightening region (11332) may be located between the DC region (11331) and the main branch collection region (1132). Since the battery cell assembly (1110) is distributed in the heat exchange area (1133), the location of the heat exchange area (1133) adjacent to the main classification collection area (1132) forms the edge of the heat exchange area (1133), and the battery cell (1112) of the battery cell assembly (1110) adjacent to the edge location corresponds to the edge of the heat exchange area (1133) described above. By installing two rectification areas (11332) at both ends of the direct current area (11331), the flow effect of the refrigerant within the heat exchange area (1133) can be further enhanced, thereby improving the comprehensiveness and efficiency of the heat exchange.

[0104] In this embodiment, the rectification area (11332) can be installed at the edge of the heat exchange area (1133) or between the DC area (11331) and the main dividing area (1132) to correspond to the battery cell (1112) at the edge location, thereby improving the uniform heat release effect.

[0105] In some embodiments, referring to FIG. 4, the rectification area (11332) further includes a sub-classification joining structure (11335), and the sub-classification joining structure (11335) connects some bent flow path structures (11334) and some straight flow path structures (11333).

[0106] As is known, in a straight flow path structure (11333), the flow direction is opposite to that of an upstream flow path (11337) and a downstream flow path (11338), and some upstream flow paths (11337) and corresponding downstream flow paths (11338) are connected. Here, along a first direction (X), the outlet of some downstream flow paths (11338) is located at one end close to the main sorting collection area (1132), and the outlet of the other downstream flow path (11338) is located at the other end away from the main sorting collection area (1132). This downstream flow path (11338) with the outlet at the other end must be connected through a bent flow path structure (11334), and this bent flow path structure (11334) must be guided through a sub-sorting confluence structure (11335) to the downstream flow path (11338) with the outlet located close to the main sorting collection area (1132). And, the sub-classification joining structure (11335) serves as a guide and joining structure.

[0107] Above, when the number of downstream flow paths (11338) located at one end where the outlet is far from the main classification collection area (1132) is greater, the number of sub-classification merging structures (11335) can be installed in multiple numbers to match this, and all of the multiple sub-classification merging structures (11335) can be connected to a single downstream flow path (11338) located at one end where the outlet is close to the main classification collection area (1132), thereby performing the functions of classification and merging.

[0108] For example, referring to FIGS. 4 and FIGS. 6, it can be seen that a plurality of straight flow path structures (11333) are extended along a first direction (X) and spaced apart along a second direction (Y), and along the first direction (X), the main branch collection area (1132) is located to the left of the DC area (11331), the upstream flow path (11337) flows to the right along the first direction (X), and the downstream flow path (11338) flows to the left along the first direction (X), and therein, two downstream flow paths (11338) are formed at both ends of the second direction (Y), and the outlets of these two downstream flow paths (11338) are located at the left end and are connected to the refrigerant flow path (1134) of the main branch collection area (1132); Since the remaining downstream flow path (11338) is installed at the right end of the outlet, by installing a sub-classification junction structure (11335), the outlet of the remaining downstream flow path (11338) is connected to these two downstream flow paths (11338) located at both ends through the sub-classification junction structure (11335).

[0109] In this embodiment, by adding a sub-classification joining structure (11335), it is convenient for the flow paths used for refrigeration in the straight flow path structure (11333) to communicate and join with each other, and convenient for guiding and joining the refrigerant being refrigerated in a specific direction.

[0110] In some embodiments, referring to FIG. 4, the heat exchange region (1133) has a third length (L3) in the first direction (X), and the refrigerant heat exchange member (1130) has a fourth length (L4) in the first direction (X), and the ratio range of the third length (L3) and the fourth length (L4) is 0.6 or greater and less than 1.

[0111] Specifically, the first direction (X) can be understood as the longitudinal direction of the heat exchange area (1133), and the inlet / outlet area (1131), main collection area (1132), and heat exchange area (1133) may also be arranged sequentially in the first direction (X). Since the refrigerant flow path (1134) within the heat exchange area (1133) is configured to exchange heat with the battery cell assembly (1110), the surface of the heat exchange area (1133) facing the battery cell assembly (1110) forms a heat exchange surface (11339), and it can be seen that the third length (L3) should be understood as the length of the heat exchange surface (11339) in the first direction (X). If the heat exchange area (1133) includes a DC area (11331) and a rectified area (11332), the third length (L3) can also be understood as the sum of the lengths of the DC area (11331) and the rectified area (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).

[0112] It should be understood that the fourth length (L4) is the length of the refrigerant heat exchange member (1130), and the length of the refrigerant heat exchange member (1130) must be the length along the first direction (X), for example, the refrigerant heat exchange member (1130) has a first surface (1135), and a portion of this first surface (1135) (i.e., the heat exchange surface (11339)) is installed facing the battery cell assembly (1110), and the length of the refrigerant heat exchange member (1130) is the length along the first direction (X) of the first surface (1135).

[0113] The ratio of the third length (L3) and the fourth length (L4) should be understood as the ratio of the lengths of the heat exchange surface (11339) and the first surface (1135) in the first direction (X), that is, the ratio of the sum of the heat exchange area (1133), the inlet / outlet area (1131), the main discharge collection area (1132), and the heat exchange area (1133); and when the width of the refrigerant heat exchange member (1130) is the same in the second direction (Y), the ratio of the sum of the heat exchange area (1133), the inlet / outlet area (1131), the main discharge collection area (1132), and the heat exchange area (1133) is the ratio of the sum of the area of ​​the heat exchange area (1133) and the area of ​​the inlet / outlet area (1131), the main discharge collection area (1132), and the heat exchange area (1133), that is, the heat exchange at the first surface (1135) of the entire refrigerant heat exchange member (1130). It can also be understood as a ratio of area (1133).

[0114] 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, which is not equal to 1.0. This ratio indicates that the heat exchange area (1133) occupies a larger proportion of the refrigerant heat exchange member (1130). This is advantageous for having a sufficient contact area for heat exchange between the battery cell assembly (1110) and the refrigerant heat exchange member (1130), is advantageous for improving the performance of the thermal management system, and can effectively control the temperature of the battery cell (1112). Here, the ratio of the third length (L3) to the fourth length (L4) may be any value between 0.6 and 1.0, which is not 1.

[0115] For example, the ratio of the third length (L3) to the fourth length (L4) is 0.875, and when using the value of 0.875 in actual application, the refrigerant heat exchanger (1130) can be made to have a sufficiently large heat exchange surface (11339), so that energy consumption is lower and the refrigerant heat exchanger (1130) can have a superior uniform heat exchange effect.

[0116] In this embodiment, by controlling the ratio of the heat exchange area (1133) in the refrigerant heat exchange member (1130) to a range of 0.6 or more and less than 1, it is advantageous to have the heat exchange area (1133) occupy a larger proportion in the refrigerant heat exchange member (1130), and to have a sufficient heat exchange area between the battery cell assembly (1110) and the refrigerant heat exchange member (1130) to exchange heat and improve heat exchange efficiency.

[0117] In some embodiments, with reference to FIGS. 7 to 9, the heat exchange region (1133) has a heat exchange surface (11339) facing the battery cell assembly (1110), and a refrigerant flow path (1134) within the heat exchange region (1133) is configured to face the heat exchange surface (11339); and the ratio of the projected area (S1) of the refrigerant flow path (1134) within the heat exchange region (1133) to the area (S2) of the heat exchange surface (11339) is 0.4 or more and 0.8 or less.

[0118] Specifically, the heat exchange surface (11339) should be understood as a portion of the first surface (1135) of the refrigerant heat exchange member (1130), and this heat exchange surface (11339) is the surface of the heat exchange area (1133) that exchanges heat with and matches the battery cell assembly (1110).

[0119] In the case of the refrigerant heat exchange member (1130) itself, the refrigerant flow path (1134) installed in the heat exchange area (1133) must be installed facing the heat exchange surface (11339). Since a gap is formed between adjacent refrigerant flow paths (1134), it can be seen that the placement area of ​​the refrigerant flow path (1134) is smaller than the area of ​​the heat exchange surface (11339). However, if the placement area of ​​the refrigerant flow path (1134) is too small, it affects the capacity and efficiency of heat exchange; and if the placement area of ​​the refrigerant flow path (1134) is too large, that is, if the placement density of the refrigerant flow path (1134) is greater, it affects the strength of the gap portion between two adjacent refrigerant flow paths (1134), so the ratio of the refrigerant flow path (1134) in the heat exchange area (1133) must be reasonably controlled.

[0120] Accordingly, in this example, the ratio of the projected area (S1) of the refrigerant flow path (1134) within the heat exchange region (1133) on the heat exchange surface (11339) to the area (S2) of the heat exchange surface (11339) is set to be 0.4 or greater and 0.8 or less. This ratio may be any value between 0.4 and 0.8, for example, this ratio may be 0.5, 0.6, 0.7, etc. The ratio between 0.4 and 0.8 described above makes the spacing distance (L5) between adjacent refrigerant flow paths (1134) more reasonable, that is, makes the thickness of the flow path wall more reasonable, and the flow path wall does not easily collapse due to the refrigerant.

[0121] In this embodiment, the ratio of the projected area of ​​the refrigerant flow path (1134) on the surface of the heat exchange area (1133) is reasonably controlled to ensure a sufficient heat exchange area between the refrigerant and the battery cell (1112), thereby reducing the risk of the refrigerant flow path (1134) becoming excessively dense or sparse, and is advantageous for optimizing the heat exchange effect, while also being convenient for the design and manufacture of the refrigerant flow path (1134).

[0122] In some embodiments, referring to FIG. 4, the spacing distance (L5) between two adjacent straight flow path structures (11333) along the second direction (Y) is 5 mm to 15 mm.

[0123] Since the refrigerant flows within the straight flow path structure (11333) and applies compressive force to the flow path wall, and also since the heat exchange method of the refrigerant heat exchanger (1130) is a direct cooling method, it has pressure inside the straight flow path structure (11333) and also applies pressure to the flow path wall, so the flow path wall between two adjacent straight flow path structures (11333) must have sufficient support force.

[0124] The spacing distance (L5) between two adjacent straight flow path structures (11333) should be understood as the distance between two adjacent flow path walls installed adjacently between the two adjacent straight flow path structures (11333), i.e., the thickness of the flow path walls, and in order to enable the flow path walls to resist the refrigerant's extrusion force and the pressure within the flow path, the spacing distance (L5) between two adjacent straight flow path structures (11333) is set to 5 mm to 15 mm, i.e., the thickness of the flow path walls between two adjacent straight flow path structures (11333) is set to 5 mm to 15 mm, and the thickness of the flow path walls can be any value from 5 mm to 15 mm, for example, the thickness of the flow path walls can be any value from 5 mm to 10 mm.

[0125] Additionally, a spacing distance (L5) of 5 mm to 15 mm allows a plurality of straight flow path structures (11333) to have a sufficient coverage area in the heat exchange area (1133), and improves the projected area of ​​the refrigerant flow path (1134) on the heat exchange surface (11339), further improving the arrangement density of the refrigerant flow path (1134), thereby achieving a uniform temperature distribution in the heat exchange area (1133).

[0126] In this embodiment, a spacing distance (L5) of 5 mm to 15 mm allows the refrigerant to have sufficient flow space between the straight flow path structures (11333), and also allows adjacent straight flow path structures (11333) to effectively exchange heat with the battery cell assembly (1110), thereby reducing the risk of insufficient heat exchange due to a spacing that is too large or excessive flow resistance due to a spacing that is too small.

[0127] In some embodiments, referring to FIG. 4, the width (L6) of the refrigerant path ranges from 6 mm to 15 mm.

[0128] If the refrigerant flow path (1134) is too wide, the contact area between the refrigerant and the battery cell (1112) is relatively reduced. This is because increasing the width of the refrigerant flow path (1134) within the same heat exchange area (1133) means that the number of flow paths decreases. At the same time, if the refrigerant flows through a wider refrigerant flow path (1134), the flow rate decreases, and the heat transferred per unit time decreases. Consequently, the heat generated in the battery cell (1112) cannot be transferred effectively in a timely manner, which affects the heat dissipation effect of the battery and is disadvantageous for maintaining the appropriate operating temperature of the battery. If the refrigerant flow path (1134) is too narrow, the refrigerant flow space is narrowed, the flow rate is limited, and the heat dissipation effect is affected.

[0129] Specifically, the refrigerant passage (1134) may include one or more independent or interconnected passages, and the width (L6) of the refrigerant passage is 6 mm or more and 15 mm or less, which refers to the width of one refrigerant passage being 6 mm or more and 15 mm or less, for example, the width (L6) of the refrigerant passages of the inlet / outlet area (1131), main classification collection area (1132), and heat exchange area (1133) described above is all 6 mm or more and 15 mm or less.

[0130] The cross-sectional shape of the refrigerant flow path (1134) may be of various shapes such as circular, elliptical, and polygonal, for example, when the cross-sectional shape of the refrigerant flow path (1134) is circular, the width (L6) of the refrigerant flow path is 6 mm or more and 15 mm or less, which indicates that the diameter of the refrigerant flow path (1134) is 6 mm or more and 15 mm or less; also, for example, when the cross-sectional shape of the refrigerant flow path (1134) is elliptical, the width (L6) of the refrigerant flow path is 6 mm or more and 15 mm or less, which indicates that the length of the major axis or minor axis of the refrigerant flow path (1134) is 6 mm or more and 15 mm or less; also, for example, when the cross-sectional shape of the refrigerant flow path (1134) is rectangular, the width (L6) of the refrigerant flow path is 6 mm or more and 15 mm or less, which indicates that the length or width of the rectangle is 6 mm or more and 15 mm or less.

[0131] A cooling channel width of 6 mm to 15 mm can optimize heat exchange efficiency, and this width can ensure a sufficient heat exchange area with the battery cell (1112) when the refrigerant flows within the straight channel structure (11333), and at the same time ensure the refrigerant flow rate and achieve efficient heat transfer, thereby allowing the heat generated in the battery cell (1112) to be released in a timely manner by the refrigerant and maintaining the appropriate operating temperature of the battery.

[0132] A flow path width of 6 mm to 15 mm can balance fluid resistance, and this width helps balance resistance to refrigerant flow. For example, the width (L6) of the refrigerant flow path can be any value from 6 mm to 15 mm, and when this gap is appropriate, the refrigerant flows smoothly within the refrigerant flow path (1134), avoiding the increase in energy consumption of the pump caused by excessive resistance due to the refrigerant flow path (1134) being too narrow; and avoiding the effect on heat dissipation efficiency caused by the refrigerant flow rate being too low due to the refrigerant flow path (1134) being too wide. Thus, under the premise of ensuring a heat dissipation effect, the energy consumption of the entire cooling system can be reduced and the energy utilization efficiency improved.

[0133] In this embodiment, the flow path width of 6 mm to 15 mm can control the flow velocity, flow rate, flow resistance, and pressure drop of the refrigerant, thereby ensuring excellent flow conditions of the refrigerant within the refrigerant flow path (1134) and being advantageous for improving heat exchange efficiency, as well as avoiding increased costs or reduced thermal management performance caused by the refrigerant flow path (1134) being excessively wide or narrow.

[0134] In some embodiments, referring to FIG. 4, the refrigerant heat exchanger (1130) also has a plurality of cavities (1138) inside, each cavity (1138) being configured to be non-connected to the refrigerant flow path (1134).

[0135] Specifically, the cavity (1138) can be understood as a hollow space inside the refrigerant heat exchanger (1130). For example, during the manufacturing process of the refrigerant heat exchanger (1130), the refrigerant heat exchanger (1130) includes an upper plate and a lower plate, and the upper plate and the lower plate are welded and fixed, and a large amount of gas is generated during welding. If this gas is not discharged in a timely manner, defects such as pores are formed in the weld line, reducing the welding quality and weld line sealing performance. The cavity (1138) is a structural cavity that provides a discharge passage for the gas generated during welding, allowing the gas to escape smoothly and reducing welding defects caused by gas accumulation. This is advantageous for ensuring the quality and reliability of the weld, improving the sealing performance of the refrigerant heat exchanger (1130), and reducing the risk of refrigerant leakage.

[0136] Additionally, the overall structural strength of the refrigerant heat exchanger (1130) can be improved by adding a plurality of cavities (1138) within the space other than the refrigerant passage (1134). The presence of the cavities (1138) changes the overall structure of the refrigerant heat exchanger (1130) to provide superior mechanical performance. From a mechanical perspective, the cavities (1138) can be used as a reinforcing structure to effectively improve the bending resistance and compression resistance strength of the refrigerant heat exchanger (1130). When the refrigerant heat exchanger (1130) is subjected to an external force, the cavities (1138) can disperse the stress and reduce stress concentration, thereby allowing the refrigerant heat exchanger (1130) to withstand a greater external force without deformation or damage, thereby improving the stability and reliability of the entire battery device (1100) and extending its service life.

[0137] In this embodiment, by installing a plurality of cavities (1138), flow can be guided and air discharged during the welding process, which is advantageous for improving welding quality and weld sealability, and is advantageous for improving the overall structural strength of the refrigerant heat exchange member (1130).

[0138] In some embodiments, referring to FIG. 14, the refrigerant heat exchange member (1130) also has a plurality of mounting holes (1139), and the mounting holes (1139) are distributed in the heat exchange area (1133) to avoid the refrigerant flow path (1134).

[0139] Specifically, the main function of the mounting hole (1139) is to be convenient for stably connecting the refrigerant heat exchanger (1130) and other structures within the battery device (1100). For example, by inserting a connecting member such as a bolt or rivet into the mounting hole (1139), the refrigerant heat exchanger (1130) can be mounted at a specific location in the box assembly (1120) or the vehicle (1000), thereby fixing the refrigerant heat exchanger (1130) and reducing vibration and displacement of the refrigerant heat exchanger (1130) during the operation of the battery device (1100).

[0140] A mounting hole (1139) may be placed in a heat exchange area (1133), for example, the mounting hole (1139) may be placed in a central area in the first direction (X) of the heat exchange area (1133) and the mounting hole (1139) may be installed between two refrigerant passages (1134) and may not be in communication with the refrigerant passages (1134), and the diameter of the mounting hole (1139) may be larger than the spacing distance (L5) between two adjacent refrigerant passages (1134), and may be formed as an avoidance bend at the location of the refrigerant passage (1134) facing the mounting hole (1139), that is, the refrigerant passage (1134) is formed in a bent shape at the location of the refrigerant passage (1134) facing the mounting hole (1139), for example, formed in a semicircular bent shape.

[0141] In this embodiment, by installing a mounting hole (1139), it is convenient to connect and fix the refrigerant heat exchanger (1130) to another member through a locking member such as a bolt, thereby improving the convenience of connecting the refrigerant heat exchanger (1130) to another member.

[0142] In some embodiments, with reference to FIGS. 4 and 6, an inlet / outlet area (1131), a main branch collection area (1132), and a heat exchange area (1133) are arranged sequentially in a first direction (X), and a refrigerant flow path (1134) within the inlet / outlet area (1131) includes a first flow direction flow path (11311) and a second flow direction flow path (11312), wherein the refrigerant flow direction within the first flow direction flow path (11311) is opposite to the refrigerant flow direction within the second flow direction flow path (11312); a refrigerant flow path (1134) within the main branch collection area (1132) includes a first flow path (11321) and a second flow path (11322), and a refrigerant flow path (1134) within the heat exchange area (1133) includes an connected upstream flow path (11337) and a downstream flow path (11338); The first flow direction channel (11311), the first channel (11321), and the upstream channel (11337) are configured to be connected sequentially, and the second flow direction channel (11312), the second channel (11322), and the downstream channel (11338) are configured to be connected sequentially.

[0143] Specifically, the refrigerant flow direction within the first flow direction channel (11311) and the refrigerant flow direction within the second flow direction channel (11312) are opposite, such that when the flow direction of the first flow direction channel (11311) is inflow, the flow direction of the second flow direction channel (11312) is outflow, or when the flow direction of the first flow direction channel (11311) is outflow, the flow direction of the second flow direction channel (11312) is inflow. Each first flow direction channel (11311) and each second flow direction channel (11312) are configured to correspond to and communicate with each refrigerant channel (1134) that has an opposite flow direction within the main classification collection area (1132), that is, the first flow direction channel (11311) is configured to communicate with the first channel (11321), and the second flow direction channel (11312) is configured to communicate with the second channel (11322). The flow directions of the first flow direction channel (11311) and the second flow direction channel (11312) can both be parallel to the first direction (X).

[0144] The first flow path (11321) and the second flow path (11322) are likewise two flow paths with opposite flow directions within the main flow path collection area (1132), and the first flow path (11321) is connected between the first flow direction flow path (11311) and the upstream flow path (11337) and can serve as a branch (or merger), and the second flow path (11322) is connected between the second flow direction flow path (11312) and the downstream flow path and can serve as a branch (or merger). The first flow path (11321) and the second flow path (11322) may each include a plurality of branch flow paths.

[0145] The upstream path (11337) is connected to the downstream path (11338), and one end of the upstream path (11337) away from the downstream path (11338) forms a heat exchange inlet, the heat exchange inlet is connected to the first path (11321), and one end of the downstream path (11338) away from the upstream path (11337) forms a heat exchange outlet, the heat exchange outlet is connected to the second path (11322), thereby allowing the refrigerant to flow into the upstream path (11337) through the heat exchange inlet, further flow into the downstream path (11338), and then be discharged through the heat exchange outlet to form a cycle heat exchange.

[0146] The inlet / outlet area (1131), the main classification collection area (1132), and the heat exchange area (1133) are arranged sequentially in the first direction (X), so that the heat exchange flow paths within the inlet / outlet area (1131), the main classification collection area (1132), and the heat exchange area (1133) are arranged sequentially in the first direction (X), thereby forming a regular shape of the area division arrangement in the refrigerant heat exchange member (1130) with different functions.

[0147] In this embodiment, the arrangement of the entrance / exit area (1131), the main classification collection area (1132), and the heat exchange area (1133) is more regular, and the battery cell assembly (1110) is installed facing the heat exchange area (1133), which is advantageous for implementing intensive heat exchange in a targeted manner and improving the uniformity of heat exchange.

[0148] In some embodiments, with reference to FIG. 6, the refrigerant flow path (1134) within the heat exchange area (1133) includes a plurality of heat exchange sub-flow paths (11336) installed in parallel, each heat exchange sub-flow path (11336) includes an upstream flow path (11337) and a downstream flow path (11338), and among some heat exchange sub-flow paths (11336), the upstream flow path (11337) is adjacent to and thermally coupled with the downstream flow path (11338) of the adjacent heat exchange sub-flow path (11336), and among some heat exchange sub-flow paths (11336), the downstream flow path (11338) is adjacent to and thermally coupled with the upstream flow path (11337) of the adjacent heat exchange sub-flow path (11336).

[0149] Referring to FIG. 6, the refrigerant flow path (1134) within the heat exchange area (1133) includes a plurality of heat exchange sub-flow paths (11336), each heat exchange sub-flow path (11336) forms a heat exchange loop, that is, each heat exchange sub-flow path (11336) has one heat exchange inlet and one heat exchange outlet, and in each heat exchange sub-flow path (11336), the upstream flow path (11337) is connected to the downstream flow path (11338).

[0150] Here, it should be noted that the upstream flow path (11337) and the downstream flow path (11338) can be understood as a straight flow path structure (11333), and the part where the upstream flow path (11337) and the downstream flow path (11338) are connected can be understood as a bent flow path structure (11334) 11334.

[0151] For example, if downstream passages (11338) are installed intensively within a plurality of heat exchange sub-passages (11336), the refrigerant heat exchange member (1130) forms a superheated area having a large area in the heat exchange surface (11339) region corresponding to the downstream passage (11338), and the superheated area refers to a region with weaker heat exchange capacity, and the superheated area is too large, affecting the overall heat exchange effect of the battery cell assembly (1110), causing the temperature of the battery cell assembly (1110) to rise, and further affecting the usage performance and lifespan of the battery cell assembly (1110) and the battery device (1100).

[0152] When analyzing the aforementioned overheating problem, the heat exchange capacity of the refrigerant in the upstream flow path (11337) is strong, so the temperature of the heat exchange surface (11339) region corresponding to the upstream flow path (11337) is low, and the heat exchange capacity of the refrigerant in the downstream flow path (11338) is relatively weak, so the temperature of the heat exchange surface (11339) region corresponding to the downstream flow path (11338) is high. Therefore, in order to reduce the area of ​​the overheating region, a plurality of heat exchange sub-flow paths (11336) are installed side by side within the refrigerant heat exchange flow path. Furthermore, among some heat exchange sub-flow paths (11336), the upstream flow path (11337) is adjacent to and thermally coupled with the downstream flow path (11338) among the adjacent heat exchange sub-flow paths (11336), and among some heat exchange sub-flow paths (11336), the downstream flow path (11338) is adjacent to the upstream flow path (11337) among the adjacent heat exchange sub-flow paths (11336). Adjacent and thermally coupled, that is, the upstream channel (11337) and downstream channel (11338) of the two heat exchange sub-channels (11336) are configured adjacently; thermally coupled refers to the fact that the adjacent upstream channel (11337) and downstream channel (11338) can transfer (or exchange) heat, and it can be understood that due to the adjacent configuration of the upstream channel (11337) and downstream channel (11338), the area of ​​the heat exchange surface (11339) corresponding to the upstream channel (11337) and the area of ​​the heat exchange surface (11339) corresponding to the downstream channel (11338) can transfer (or exchange) heat.

[0153] It can be seen that the upstream flow path (11337) and the downstream flow path (11338) are thermally coupled, so that the low temperature of the upstream flow path (11337) is offset by the high temperature of the downstream flow path (11338). That is, the low temperature region of the heat exchange surface (11339) corresponding to the upstream flow path (11337) is offset by the high temperature of the high temperature region of the heat exchange surface (11339) corresponding to the downstream flow path (11338), thereby reducing the temperature difference of the heat exchange surface (11339) in the refrigerant heat exchange member (1130). Consequently, the temperature of the region of the heat exchange surface (11339) corresponding to the downstream flow path (11338) adjacent to the upstream flow path (11337) does not easily rise excessively and the temperature becomes relatively lower, so that an overheating region is not easily formed, and the temperature distribution of the heat exchange surface (11339) becomes more uniform. Then, the upstream channel (11337) and downstream channel (11338) within the two adjacent heat exchange sub-channels (11336) form corresponding temperature uniform regions on the heat exchange surface (11339).

[0154] Here, it should be noted that the upstream channel (11337) and downstream channel (11338) within the plurality of heat exchange sub-channels (11336) are both facing the heat exchange surface (11339), and the heat exchange medium within the upstream channel (11337) and downstream channel (11338) exchanges heat with the heat exchange surface (11339), and then the heat exchange surface (11339) exchanges heat with the battery cell assembly (1110).

[0155] The battery cell assembly (1110) can exchange heat by directly contacting the heat exchange surface (11339) of the refrigerant heat exchange member (1130), or the battery cell assembly (1110) and the heat exchange surface (11339) can be installed apart and the battery cell assembly (1110) can be positioned close to the heat exchange surface (11339) so that the refrigerant heat exchange member (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).

[0156] When combining the schematic diagram of the temperature distribution of the refrigerant heat exchange flow path in FIG. 15, it can be clearly seen that the temperature of the downstream flow path (11338) adjacent to the upstream flow path (11337) is significantly balanced, and in FIG. 15, the larger the number, the higher the temperature, and the size of the number indicates the temperature level.

[0157] In this embodiment, the upstream channel (11337) and the downstream channel (11338) among the two heat exchange sub-channels (11336) are configured adjacently so that the low temperature of the upstream channel (11337) offsets the high temperature of the downstream channel (11338), thereby reducing the temperature of the heat exchange surface (11339) area corresponding to the downstream channel (11338), so that an overheated area is not easily formed, and the area of ​​the overheated area is relatively reduced, which is advantageous for improving the heat exchange efficiency for the battery cell assembly (1110), and the temperature distribution of the refrigerant heat exchange member (1130) on the heat exchange surface (11339) is made more uniform, thereby improving the heat exchange uniformity for the battery cell assembly (1110).

[0158] In some embodiments, with reference to FIG. 6, a plurality of heat exchange sub-flow paths (11336) are installed sequentially along a second direction (Y), and among the heat exchange sub-flow paths (11336), an upstream flow path (11337) and a downstream flow path (11338) are both installed to extend along a first direction (X), and the second direction (Y) is perpendicular to the first direction (X).

[0159] It should be noted here that the first direction (X) may 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), and correspondingly, the second direction (Y) is the width direction (or length direction) of the heat exchange surface (11339).

[0160] Specifically, the first direction (X) and the second direction (Y) are both parallel to the heat exchange surface (11339). Taking the example of a case where the refrigerant heat exchange member (1130) is plate-shaped, the portion facing the battery cell assembly (1110) on one side of the plate surface of the refrigerant heat exchange member (1130) can form the heat exchange surface (11339). When the first direction (X) is the length direction of the plate surface, the second direction (Y) is the width direction of the plate surface. The upstream flow path (11337) and the downstream flow path (11338) are both installed to extend along the first direction (X). The upstream flow path (11337) and the downstream flow path (11338) are installed parallel to each other and spaced apart. The extension direction of the upstream flow path (11337) and the downstream flow path (11338) is both the length direction of the plate surface. In one heat exchange sub-flow path (11336), a plurality of upstream It can be seen that the upstream flow path (11337) and a plurality of downstream flow paths (11338) may be included, and that the upstream flow path (11337) and the downstream flow path (11338) are connected at one location along the first direction (X).

[0161] In this embodiment, the upstream flow path (11337) and the downstream flow path (11338) are extended in the first direction (X) and installed adjacently, which is advantageous for increasing the length of the adjacent area between the upstream flow path (11337) and the downstream flow path (11338), increasing the area of ​​the adjacent heat exchange, and increasing the heat exchange efficiency.

[0162] In some embodiments, with reference to FIGS. 12 and FIGS. 13, at least one first flow direction channel (11311) is installed and a plurality of second flow direction channels (11312) are installed, and all first flow direction channels (11311) are distributed between two adjacent second flow direction channels (11312).

[0163] Specifically, when multiple first flow direction channels (11311) are installed, multiple first flow direction channels (11311) are installed adjacently, and all first flow direction channels (11311) are distributed between any two second flow direction channels (11312) within all second flow direction channels (11312). For example, the flow direction of the first flow direction channel (11311) is an inflow direction, and the inflow direction is an inflow direction into the refrigerant channel (1134) within the main classification collection area (1132); the flow direction of the second flow direction channel (11312) is an outflow direction; a plurality of first flow direction channels (11311) are installed adjacently and distributed between any two adjacent second flow direction channels (11312); all first flow direction channels (11311) in the inflow direction are distributed between two second flow direction channels (11312) in the outflow direction, that is, the inflow direction channels are located at a position close to the center, and the outflow direction channels are located at an outer position away from the center; the first flow direction channels (11311) are clamped in the middle area of ​​the two second flow direction channels (11312), that is, the second flow direction channels (11312) are outside all first flow direction channels (11311). You can see the covering box.

[0164] Optionally, for example, the flow direction of the first flow direction channel (11311) is the outflow direction, and the flow direction of the second flow direction channel (11312) is the inflow direction, and a plurality of first flow direction channels (11311) are installed adjacently and distributed between any two adjacent second flow direction channels (11312), and all first flow direction channels (11311) in the outflow direction are distributed between two second flow direction channels (11312) in the inflow direction, that is, the outflow direction channels are located at a position close to the center, and the inflow direction channels are located at an outer position away from the center, and the first flow direction channels (11311) are clamped in the middle area of ​​the two second flow direction channels (11312), that is, the second flow direction channels (11312) cover the outside of all first flow direction channels (11311).

[0165] In this embodiment, the first flow direction channel (11311) is concentrated between two second flow direction channels (11312) to reduce mounting space and complexity, making it convenient for the concentrated transport of refrigerant, and the concentrated, close channel layout is convenient for integration and mounting with other components such as structural members, which is advantageous for improving the integration and reliability of the entire system.

[0166] In some embodiments, the flow direction of the refrigerant in the first flow direction channel (11311) is the inflow direction into the refrigerant channel (1134) in the main classification collection area (1132).

[0167] It can be seen that the flow path in the inflow direction is located between two flow paths in the outflow direction, and the first flow path (11311) in the inflow direction is located at an intermediate position, thereby realizing the effect of the refrigerant flowing into the refrigerant flow path (1134) within the main classification collection area (1132) dispersed from the center, and in this case, the refrigerant flow path (1134) in the inflow direction within the main classification collection area (1132) can likewise be located corresponding to the central area of ​​the main classification collection area (1132); However, since the second flow direction path (11312) in the outflow direction is located at both sides, in this case, the refrigerant path (1134) in the outflow direction within the main classification collection area (1132) can likewise be located corresponding to both sides or the edge area of ​​the main classification collection area (1132), thereby controlling the refrigerant in the inflow direction of the inlet / outlet area (1131) and the main classification collection area (1132) to the central position and controlling the refrigerant in the outflow direction to the edge position, so that the overall flow direction of the refrigerant can be made more concentrated and regular.

[0168] In addition, refrigerants with the same flow direction are more concentrated, which is advantageous for reducing flow resistance caused by multiple direction changes, improving the smoothness of refrigerant flow, and enhancing flow efficiency.

[0169] In this embodiment, the above-described design is advantageous for positioning the refrigerant release in the inflow direction in the central region of the refrigerant heat exchange member (1130), and is advantageous for improving the flow rate when the refrigerant is introduced and improving the heat exchange efficiency.

[0170] In some embodiments, referring to FIG. 11, the first channel (11321) comprises a plurality of first branch channels (11323) and a plurality of second branch channels (11324), each first branch channel (11323) is configured to communicate with each of the plurality of second branch channels (11324); the first branch channels (11323) are installed to extend along a second direction (Y), and each second branch channel (11324) is installed to extend along a first direction (X); One end of each first branch path (11323) extending away from the second branch path (11324) is configured to communicate with a refrigerant path (1134) (i.e., a first flow direction path (11311) or a second flow direction path (11312)) within the inlet / outlet area (1131), and one end of each second branch path (11324) extending away from the first branch path (11323) is configured to communicate with a refrigerant path (1134) (i.e., an upstream path (11337)) within the heat exchange area (1133); and the second direction (Y) is perpendicular to the first direction (X).

[0171] Specifically, the first branch path (11323) and each second branch path (11324) are configured to be connected, and the heat exchange medium first passes through the first branch path (11323) from the first flow direction path (11311), then flows into each second branch path (11324), and from each second branch path (11324) flows into each refrigerant path (1134) (specifically, each corresponding upstream path (11337)) within the heat exchange area (1133) in a corresponding manner. The first branch path (11323) and the second branch path (11324) form a classification area corresponding to the first surface (1135) of the refrigerant heat exchange member (1130).

[0172] One or more first branch channels (11323) may be installed, and each first branch channel (11323) is connected to a plurality of second branch channels (11324), and the first branch channels (11323) are installed to extend along the second direction (Y), and the extension length direction of the first branch channels (11323) is the same as the arrangement direction of each heat exchange sub-channel (11336), and if the flow direction of the first branch channels (11323) is the inflow direction, the heat exchange medium flows more smoothly within the first branch channels (11323), and it is advantageous to reduce the flow path through which the refrigerant enters the second branch channels (11324) and the upstream channels (11337) and to reduce heat exchange losses.

[0173] Each second branch channel (11324) is installed to extend along the first direction (X), that is, each second branch channel (11324) is installed parallel to and spaced apart from each other, and each second branch channel (11324) is connected perpendicularly to the first branch channel (11323), and each upstream channel (11337) is installed to extend along the first direction (X), so that each second branch channel (11324) faces each upstream channel (11337), thereby allowing the heat exchange medium to flow more smoothly from each second branch channel (11324) to each upstream channel (11337), and is advantageous for reducing heat loss by shortening the flow path of the heat exchange medium flowing between the upstream channels (11337).

[0174] A heat exchange medium (refrigerant) is introduced into the refrigerant heat exchange member (1130), and the purpose is to reduce the temperature difference problem of the refrigerant heat exchange member (1130) caused by uneven distribution. The distribution of the heat exchange medium is affected by the dryness of the heat exchange medium, and the higher the dryness, the more difficult the distribution becomes. Since the dryness is lowest when the heat exchange medium is introduced into the refrigerant heat exchange member (1130), the impact on the heat exchange medium is smallest when it is distributed in this area. This area is generally divided into a plurality of second branch flow paths (11324), and the purpose is to allow the installation of a plurality of upstream flow paths (11337) so as to reduce the impact on the temperature uniformity of the cooling plate caused by the lack of heat exchange capacity of a specific heat exchange sub-flow path (11336). The upstream flow path (11337) and downstream flow path (11338) within any two adjacent heat exchange sub-flow paths (11336) are balanced with each other so as to further improve the temperature uniformity of the refrigerant heat exchange member (1130). The effective lengths of the multiple heat exchange sub-flow paths (11336) must be kept consistent to reduce uneven distribution caused by the difference in flow resistance between each first branch flow path (11323) and the second branch flow path (11324), thereby further reducing the temperature difference of the refrigerant heat exchange member (1130) (or the first surface (1135)) and improving the temperature uniformity of the refrigerant heat exchange member (1130).

[0175] By making the cross-sectional areas of the first branch path (11323) and the second branch path (11324) and the cross-sectional area of ​​the upstream path (11337)—that is, the cross-sectional area of ​​the upstream path (11337), the cross-sectional area of ​​the downstream path (11338), the cross-sectional area of ​​the first branch path (11323), and the cross-sectional area of ​​the second branch path (11324)—all equal, it is advantageous to reduce the flow resistance of the refrigerant during the process of the refrigerant flowing from the first branch path (11323) to the second branch path (11324) and during the process of the refrigerant flowing from the second branch path (11324) to the upstream path (11337).

[0176] In this embodiment, the first branch flow path (11323) and the second branch flow path (11324) are connected, and the first branch flow path (11323) is installed to extend along the second direction (Y) so as to coincide with the arrangement direction of each heat exchange sub-flow path (11336), which is advantageous for improving the smooth flow of the heat exchange medium; and each second branch flow path (11324) is perpendicular to the first branch flow path (11323) and each second branch flow path (11324) is positioned to face each upstream flow path (11337), which is advantageous for improving the smooth flow of the heat exchange medium, reducing the flow path of the heat exchange medium, and reducing heat exchange losses.

[0177] In some embodiments, referring to FIG. 2, a box assembly (1120) comprises a box body (1121) having an open opening, and a refrigerant heat exchanger (1130) is connected to the box body (1121) and covers the open opening to form a receiving chamber (1124); and the refrigerant heat exchanger (1130) is installed opposite the battery cell assembly (1110).

[0178] Specifically, the box body (1121) may include a cover body (1122) and a box frame (1123), the cover body (1122) and the box frame (1123) cover each other, and an opening is formed on one side of the box frame (1123) facing the cover body (1122), and the cover body (1122) and the box frame (1123) are connected to form a groove structure having an opening, and the cover body (1122), the box frame (1123), and the refrigerant heat exchange member (1130) jointly define a receiving chamber (1124) for receiving a battery cell assembly (1110). Here, the cover body (1122) may have a plate-like structure, and the box frame (1123) may have a hollow structure with both ends open, for example, the box frame (1123) may have an annular frame structure, the cover body (1122) may cover one opening side of the box frame (1123), the refrigerant heat exchanger (1130) may be connected to the other opening (i.e., opening) side of the box frame (1123), and the cover body (1122) may be installed facing the refrigerant heat exchanger (1130). The box body (1121) may have various shapes such as a cylinder, a rectangular prism, etc.

[0179] The refrigerant heat exchanger (1130) can be connected to the box body (1121), and the refrigerant heat exchanger (1130) can form a box bottom plate facing the battery cell assembly (1110), so that it can exchange heat with the battery cell assembly (1110) and can also be used to support the battery cell assembly (1110), which is advantageous for simplifying the structure of the outer box body (1121) and for reducing the weight of the battery device (1100).

[0180] In this embodiment, the refrigerant heat exchanger (1130) can be connected to the box body (1121), and the refrigerant heat exchanger (1130) can form the bottom plate of the box, so that it can exchange heat with the battery cell assembly (1110) and can also be used to support the battery cell assembly (1110), which is advantageous for simplifying the structure of the outer box body (1121) and for reducing the weight of the battery device (1100).

[0181] In some embodiments, the refrigerant path (1134) is filled with a phase change medium.

[0182] Specifically, the phase change medium is a material that undergoes a phase change at a specific temperature and can absorb or release a large amount of latent heat during the phase change process. In this example, the phase change medium uses a heat exchange medium, and when the battery cell assembly (1110) generates a large amount of heat during the charging and discharging process, the phase change medium within the refrigerant path (1134) absorbs heat and undergoes a phase change to slow down the rapid temperature rise of the battery device (1100). When the temperature of the battery device (1100) decreases, the phase change medium also releases heat to slow down the impact on performance caused by the battery temperature becoming excessively low. By using the phase change medium, the heat exchange medium helps maintain the temperature of the battery device (1100) relatively stably, thereby reducing problems such as capacity reduction and shortened lifespan of the battery device (1100) due to excessively high temperatures, or problems such as increased internal resistance and reduced charging and discharging efficiency of the battery device (1100) due to excessively low temperatures, thereby improving the overall performance, reliability, and stability of the battery device (1100).

[0183] Here, it should be noted that the phase change medium and the refrigerant can work together. For example, in a large battery energy storage system, the refrigerant serves to transfer heat generated in the battery cell assembly (1110) from the battery module to the heat dissipation section of the entire thermal management system, and the phase change medium is placed inside the battery module. When a large amount of heat is generated in a short period of time in the battery cell assembly (1110), the phase change medium rapidly absorbs the heat to cause a phase change and mitigates the rapid temperature rise, thereby buying time for additional heat dissipation by the refrigerant, and the two work together to improve the efficiency and stability of the thermal management system.

[0184] In this embodiment, a phase change medium is filled within the refrigerant path (1134), which is advantageous for improving heat exchange efficiency and improving the performance stability of the battery device (1100).

[0185] In some embodiments, the refrigerant heat exchanger (1130) is formed of one or more combinations of metal and non-metal.

[0186] Specifically, metal materials such as copper and aluminum have excellent thermal conductivity, allowing heat to be transferred quickly, so that the refrigerant heat exchanger (1130) can efficiently transfer heat generated in the battery cell assembly (1110). Non-metal materials such as ceramics have unique thermal performance advantages; for example, some ceramic materials have high temperature resistance, allowing them to maintain stable thermal conductivity even in high-temperature environments. By using a combination of metals and non-metals, their respective thermal conductivity advantages can be fully utilized, so that the refrigerant heat exchanger (1130) consistently maintains efficient thermal conductivity across different operating temperature ranges and heat load conditions, thereby improving the overall performance of the battery thermal management system.

[0187] In this embodiment, the material selection of the refrigerant heat exchange member (1130) is more flexible and diverse, and can be flexibly combined and manufactured according to the heat exchange requirements of the battery device (1100), so that the refrigerant heat exchange member (1130) can maintain efficient heat conduction ability and improve the overall performance of the battery thermal management system.

[0188] In some embodiments, with reference to FIGS. 3 and 4, the battery device (1100) further comprises a connector member (1140), the connector member (1140) is connected to a refrigerant heat exchange member (1130) and installed to communicate with a refrigerant flow path (1134) of an inlet / outlet area (1131).

[0189] Specifically, the connector member (1140) is provided with a flow path inlet and a flow path outlet, and the refrigerant flow path (1134) within the inlet / outlet area (1131) includes a plurality of first flow direction flow paths (11311) and a plurality of second flow direction flow paths (11312), the flow path inlet is connected to each first flow direction flow path (11311), and the flow path outlet is connected to each second flow direction flow path (11312). The connector member (1140) may be connected to the refrigerant heat exchange member (1130) by welding, or the connector member (1140) may be connected to the refrigerant heat exchange member (1130) using a member such as a fastening member. The connector member (1140) may be installed above the first surface (1135) and close to the edge.

[0190] In this embodiment, by installing a connector member (1140), it is convenient to connect to an external pipe for transporting a heat exchange medium (i.e., refrigerant), thereby improving assembly convenience.

[0191] According to some embodiments of the present application, the present application further provides a refrigerant heat exchanger comprising a refrigerant heat exchanger member (1130) within a battery device (1100) according to any one of the embodiments described above.

[0192] An example of a refrigerant heat exchanger according to the present application is based on an example of a battery device (1100) described above, and the structure of the refrigerant heat exchanger (1130) in the example of the battery device (1100) described above is identical to the structure of the refrigerant heat exchanger (1130) in this example, and the technical effects are identical and are not described repeatedly here, and specifically, one may refer to the description of the battery device (1100) described above.

[0193] According to some embodiments of the present application, the present application further provides an energy storage device, wherein the energy storage device comprises a power conversion device and an energy storage device according to the above-described embodiment, and the power conversion device is used to electrically connect a power generation device and an energy storage device.

[0194] Specifically, the energy storage device may include one or more battery clusters to improve the voltage and capacity of the energy storage device. A battery cluster may include a plurality of battery devices (1100), and the plurality of battery devices (1100) are connected in series via a bus member to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device.

[0195] Energy storage devices can be used in energy storage power plants, wind power systems, solar power systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output electrical energy at appropriate times. For example, an energy storage device can store electrical energy during periods of low power consumption and provide it to relevant users or electrical equipment during periods of high power consumption. The energy storage system provided in the embodiments of this application may be any power system that requires an energy storage device.

[0196] In some embodiments, the energy storage device is an energy storage container or an energy storage electric cabinet.

[0197] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, and the battery clusters are accommodated in the cabinet.

[0198] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, an overall control module, a power distribution module, and a firefighting module.

[0199] As an example, the thermal management module may include a liquid cooling device, and the liquid cooling device provides a cooling liquid to each battery device (1100) through piping to control the temperature of the battery cell.

[0200] As an example, the main control module can serve as the battery management unit of the battery cluster and is 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 example, it can control the charge / discharge current, voltage, etc., of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU, Slave Battery Management Unit, SBMU) and a fusion switch.

[0201] For example, the overall control module can serve as the battery management unit of an energy storage device and is used to monitor and manage the energy storage device. The overall control module can monitor information such as the current, voltage, power, charge status, or temperature of the energy storage device. For instance, it can control the charge / discharge current, voltage, etc., of the energy storage device. As an example, the overall control module includes modules such as the Insulation Monitoring Module (IMM), Master Battery Management Unit (MBMU), EtherNet (ETH), and fiber optic conversion module.

[0202] As an example, a firefighting module includes a control panel, detectors, alarm notification devices, etc., and is used to detect, alarm, or extinguish energy storage systems.

[0203] As an example, a power distribution module can be used to distribute power from an energy storage device to modules that require electricity.

[0204] According to some embodiments of the present application, the present application further provides an energy storage system, wherein the energy storage system comprises a power conversion device and an energy storage device according to the above-described embodiments, and the power conversion device is used to electrically connect a power generation device and an energy storage device.

[0205] In some embodiments, the energy storage system may include one or more energy storage devices and a power converter system (abbreviated as PCS), and the power converter system is used to connect the power generation device and the energy storage device. The power generation device is used to generate electrical energy, and the electrical energy generated by the power generation device can be stored in the energy storage device through the power converter system. As an example, the power generation device may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. Herein, the specific type of the power generation device is not limited in this application.

[0206] According to some embodiments of the present application, with reference to FIG. 1, the present application provides an electric device, the electric device comprising a battery device (1100) according to the above-described embodiment, an energy storage device according to the above-described embodiment, or an energy storage system according to the above-described embodiment, wherein the battery device (1100) is used to store or provide electric energy.

[0207] All technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, such as mobile phones, portable devices, laptop computers, battery cars, electric toys, electric tools, vehicles (1000), ships, and spacecraft, for example, spacecraft include aircraft, rockets, space shuttles, spacecraft, etc.

[0208] An example of an electric device according to the present application is based on the example of the battery device (1100) described above, and the example of the electric device includes all technical effects of the example of the battery device (1100) described above, which are not further described herein.

[0209] According to some embodiments of the present application, the present application further provides a charging network, the charging network comprising a charging station and an energy storage device according to the above-described embodiment or an energy storage system according to the above-described embodiment, the energy storage device being used to provide electrical energy to the charging station.

[0210] For example, a charging network includes a charging station and an energy storage device, the charging station is electrically connected to the energy storage device, and the energy storage device is used to provide electrical energy to the charging station. The charging station and the battery device (1100) within the energy storage device are electrically connected by a cable, and the battery device (1100) can provide electrical energy stored in itself to the charging station. The charging station has one or more connectors, and the connectors are used to connect to an electrical device (e.g., a vehicle (1000)) to replenish energy to the electrical device.

[0211] The energy storage device may be located inside the charging station (e.g., an integrated energy storage and charging device) or outside the charging station.

[0212] The foregoing is merely a preferred embodiment of the present application and specifically describes the technical principles of the present application; such description is intended to explain the principles of the present application and should not be construed as limiting the scope of protection of the present application in any way. Based on this description, all modifications, equivalent substitutions, improvements, and other specific embodiments of the present application made within the spirit and principles of the present application, and conceivable by a person of ordinary skill in the art without creative labor, shall all be included within the scope of protection of the present application. Explanation of the symbols

[0213] 1000, vehicle; 1100, battery unit; 1110, battery cell assembly; 1111, battery cell group; 1112, battery cell; 1120, box assembly; 1121, box body; 1122, cover body; 1123, box frame; 1124, receiving chamber; 1130, refrigerant heat exchanger; 1131, inlet / outlet area; 11311, first flow direction path; 11312, second flow direction path; 1132, main branch collection area; 11321, first path; 11322, second path; 11323, first branch path; 11324, second branch path; 1133, heat exchange area; 11331, DC area; 11332, rectification area; 11333, straight path structure; 11334, bent flow path structure; 11335, sub-classification junction structure; 11336, heat exchange sub-flow path; 11337, upstream flow path; 11338, downstream flow path; 11339, heat exchange surface; 1134, refrigerant flow path; 1135, first surface; 1136, first sub-member; 1137, second sub-member; 1138, cavity; 1139, mounting hole; 1140, connector member; 1200, controller; 1300, motor; X, first direction; Y, second direction; L1, first length; L2, second length; L3, third length; L4, fourth length; L5, gap distance; L6, refrigerant flow path width.

Claims

Claim 1 As a battery device, a box assembly (1120) having a receiving chamber (1124); a battery cell assembly (1110) received within the receiving chamber (1124); a refrigerant heat exchanger comprising an inlet / outlet area (1131) having a refrigerant flow path (1134), a main flow collection area (1132), and a heat exchange area (1133), wherein the main flow collection area (1132) is located between the inlet / outlet area (1131) and the heat exchange area (1133), and the refrigerant flow path (1134) within the main flow collection area (1132) communicates with the inlet / outlet area (1131) and the refrigerant flow path (1134) within the main flow collection area (1132); and the inlet / outlet area (1131) is configured to allow refrigerant to flow into or out from the refrigerant flow path (1134). A battery device (1100) characterized by including a refrigerant heat exchanger (1130) wherein the heat exchanger area (1133) overlaps with the projection of the battery cell assembly (1110) in the refrigerant heat exchanger (1130), and the refrigerant flow path (1134) within the heat exchanger area (1133) is configured to exchange heat with the battery cell assembly (1110); and the main classification collection area (1132) and the inlet / outlet area (1131) are both configured not to overlap with the projection of the battery cell assembly (1110) in the refrigerant heat exchanger (1130). Claim 2 In claim 1, the heat exchange region (1133) includes a DC region (11331) and a rectification region (11332), and the refrigerant flow path (1134) within the DC region (11331) is composed of a plurality of straight flow path structures (11333) installed spaced apart from the second direction (Y), each of the straight flow path structures (11333) extends along the first direction (X); the refrigerant flow path (1134) within the rectification region (11332) is composed of a bent flow path structure (11334), and the bent flow path structure (11334) communicates with the straight flow path structure (11333); and the second direction (Y) is perpendicular to the first direction (X); A battery device (1100) characterized in that the battery cell assembly (1110) is installed facing the DC region (11331), or the battery cell assembly (1110) is installed facing both the DC region (11331) and the rectification region (11332). Claim 3 A battery device (1100) characterized in that, in paragraph 2, the battery cell assembly (1110) comprises a plurality of battery cell groups (1111) arranged in a second direction (Y), and each of the battery cell groups (1111) comprises a plurality of battery cells (1112) stacked along a first direction (X). Claim 4 A battery device (1100) characterized in that, in paragraph 2, the straight flow path structure (11333) has a first length (L1) in the first direction (X), the bent flow path structure (11334) has a second length (L2) in the first direction (X), and the ratio of the second length (L2) to the first length (L1) is less than 0.

1. Claim 5 A battery device (1100) characterized in that, in paragraph 2, the rectification region (11332) is located at the edge of the heat exchange region (1133), and / or, the rectification region (11332) is located between the direct current region (11331) and the main division collection region (1132). Claim 6 A battery device (1100) according to paragraph 2, wherein the rectification area (11332) further includes a sub-classification junction structure (11335), and the sub-classification junction structure (11335) connects some of the bent flow path structure (11334) and some of the straight flow path structure (11333). Claim 7 A battery device (1100) characterized in that, in any one of claims 1 to 6, the heat exchange region (1133) has a third length (L3) in the first direction (X), the refrigerant heat exchange member (1130) has a fourth length (L4) in the first direction (X), and the ratio range of the third length (L3) and the fourth length (L4) is 0.6 or greater and less than 1. Claim 8 A battery device (1100) characterized in that, in any one of claims 1 to 6, the heat exchange area (1133) has a heat exchange surface (11339) facing the battery cell assembly (1112), and the refrigerant flow path (1134) within the heat exchange area (1133) is configured to face the heat exchange surface (11339); and the ratio of the projected area of ​​the refrigerant flow path (1134) within the heat exchange area (1133) to the area of ​​the heat exchange surface (11339) is 0.4 or more and 0.8 or less. Claim 9 A battery device (1100) characterized in that, in any one of claims 2 to 6, the range of the spacing distance (L5) between two adjacent straight flow path structures (11333) along the second direction (Y) is 5 mm to 15 mm. Claim 10 A battery device (1100) characterized in that, in any one of claims 1 to 6, the width (L6) of the refrigerant flow path ranges from 6 mm to 15 mm. Claim 11 A battery device (1100) characterized in that, in any one of claims 1 to 6, the refrigerant heat exchange member (1130) also has a plurality of cavities (1138) inside, and each of the cavities (1138) is configured to be non-communicable to the refrigerant flow path (1134). Claim 12 A battery device (1100) characterized in that, in any one of claims 1 to 6, the refrigerant heat exchange member (1130) also has a plurality of mounting holes (1139), and the mounting holes (1139) are distributed in the heat exchange area (1133) to avoid the refrigerant flow path (1134). Claim 13 In any one of claims 1 to 6, the inlet / outlet area (1131), the main classification collection area (1132), and the heat exchange area (1133) are arranged sequentially in a first direction (X), and the refrigerant flow path (1134) within the inlet / outlet area (1131) includes a first flow direction flow path (11311) and a second flow direction flow path (11312), and the refrigerant flow direction within the first flow direction flow path (11311) is opposite to the refrigerant flow direction within the second flow direction flow path (11312); The refrigerant flow path (1134) within the main classification collection area (1132) includes a first flow path (11321) and a second flow path (11322), and the refrigerant flow path (1134) within the heat exchange area (1133) includes an upstream flow path (11337) and a downstream flow path (11338) connected thereto; the first flow direction flow path (11311), the first flow path (11321), and the upstream flow path (11337) are configured to be connected sequentially, and the second flow direction flow path (11312), the second flow path (11322), and the downstream flow path (11338) are configured to be connected sequentially, characterized in that the battery device (1100). Claim 14 In claim 13, the refrigerant flow path (1134) within the heat exchange area (1133) comprises a plurality of heat exchange sub-flow paths (11336) installed in parallel, each of the heat exchange sub-flow paths (11336) comprises an upstream flow path (11337) and a downstream flow path (11338), and some of the upstream flow paths (11337) of the heat exchange sub-flow paths (11336) are adjacent to and thermally coupled with the downstream flow path (11338) of the adjacent heat exchange sub-flow paths (11336), and some of the downstream flow paths (11338) of the heat exchange sub-flow paths (11336) are adjacent to and thermally coupled with the upstream flow path (11337) of the adjacent heat exchange sub-flow paths (11336). Battery device (1100). Claim 15 A battery device (1100) characterized in that, in claim 14, a plurality of the above-mentioned heat exchange sub-flow paths (11336) are installed sequentially along a second direction (Y), and among the above-mentioned heat exchange sub-flow paths (11336), the upstream flow path (11337) and the downstream flow path (11338) are both installed to extend along the first direction (X), and the second direction (Y) is perpendicular to the first direction (X). Claim 16 A battery device (1100) according to claim 13, wherein at least one first flow direction channel (11311) is installed and multiple second flow direction channels (11312) are installed, and all first flow direction channels (11311) are distributed between two adjacent second flow direction channels (11312). Claim 17 A battery device (1100) characterized in that, in claim 16, the flow direction of the refrigerant within the first flow direction channel (11311) is an inflow direction flowing into the main classification collection area (1132). Claim 18 A battery device (1100) characterized in that, in any one of claims 1 to 6, the box assembly (1120) comprises a box body (1121) having an open opening, and the refrigerant heat exchanger (1130) is connected to the box body (1121) and covers the open opening to form the receiving chamber (1124); and the refrigerant heat exchanger (1130) is installed opposite the battery cell assembly (1110). Claim 19 A refrigerant heat exchanger, wherein the refrigerant heat exchanger comprises a refrigerant heat exchanger member (1130) within a battery device (1100) according to any one of claims 1 to 18. Claim 20 An electric device comprising, as an electric device, a battery device (1100) according to any one of claims 1 to 18, wherein the battery device (1100) is used to store or provide electric energy.

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