Heat exchange structure and battery

Abstract

The utility model relates to a heat exchange structure and a battery. The heat exchange structure comprises a heat exchange bottom plate and a heat exchange plate, wherein a first flow channel for heat exchange fluid to flow is formed in the heat exchange bottom plate; the heat exchange side plate set is arranged on the heat exchange bottom plate and comprises at least three heat exchange side plates arranged at intervals in the first direction, every two adjacent heat exchange side plates and the heat exchange bottom plate jointly define a heat exchange area, and each heat exchange side plate is internally provided with a second flow channel; the pipeline assembly comprises a first pipeline unit and a second pipeline unit, the first pipeline unit is directly communicated with the first flow channel and the liquid inlet of each second flow channel and can output heat exchange fluid in the first flow channel into each second flow channel, and the second pipeline unit is directly communicated with the first flow channel and the liquid outlet of each second flow channel and can output heat exchange fluid in the second flow channel into each second flow channel. And the heat exchange fluid subjected to heat exchange in each second flow channel can be output into the first flow channel. According to the heat exchange structure and the battery, the structure can be simplified, the occupied space is reduced, and the heat exchange effect can be improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a heat exchange structure and a battery. Background Technology

[0002] In recent years, the new energy industry has received increasing attention, and as an important part of the new energy industry, batteries occupy a large share of the market.

[0003] Considering the safety and reliability of battery use, increasing the contact area between the heat exchange plate and the battery cells is receiving increasing attention. A common way to increase the contact area between the heat exchange plate and the battery cells is to use a method that can achieve heat dissipation from the battery cells while simultaneously accommodating bottom and side heat exchange. However, this method requires the use of a distributor to distribute the heat exchange fluid from the inlet and outlet pipe assembly to the side heat exchange plates for side heat exchange through multiple distribution pipes. The problems with this method are that the inlet and outlet pipe assembly and the distribution pipes occupy a large space and have a complex structure. Furthermore, when the heat exchange side plates are connected in series, the heat exchange efficiency of the heat exchange fluid decreases along the flow path, resulting in poor heat exchange performance and low heat exchange efficiency for the battery cells under fast charging conditions. Utility Model Content

[0004] Therefore, it is necessary to provide a heat exchange structure and battery that can simplify the structure, reduce the space occupied, and improve the heat exchange effect to address the above problems.

[0005] A heat exchange structure, the heat exchange structure comprising:

[0006] The heat exchange base plate has a first flow channel for the flow of heat exchange fluid.

[0007] A heat exchange side plate assembly, disposed on the heat exchange base plate, includes at least three heat exchange side plates spaced apart along a first direction. Each pair of adjacent heat exchange side plates and the heat exchange base plate together define a heat exchange area. Each heat exchange side plate has a second flow channel.

[0008] The piping assembly includes a first piping unit and a second piping unit. The first piping unit is directly connected to the inlet of the first flow channel and each of the second flow channels, and is able to output the heat exchange fluid in the first flow channel to each of the second flow channels. The second piping unit is directly connected to the outlet of the first flow channel and each of the second flow channels, and is able to output the heat exchange fluid after heat exchange in each of the second flow channels to the first flow channel.

[0009] In some embodiments, the heat exchange side plate has a first end face disposed along a second direction intersecting the first direction. The first end face is provided with an inlet and an outlet for the second flow channel in the heat exchange side plate. The first pipe unit and the second pipe unit are located on the same side of the heat exchange side plate assembly disposed along the second direction, and the first end face of the heat exchange side plate is disposed facing the first pipe unit and the second pipe unit.

[0010] In some embodiments, the first pipeline unit includes a plurality of first two-way valves, at least one first three-way valve, a plurality of first pipelines and an inlet pipe, wherein the inlet pipe is connected between a first pipeline and a first flow channel;

[0011] The heat exchange side plate at the first position is defined as the first heat exchange side plate, the heat exchange side plate at the last position is defined as the last heat exchange side plate, and the heat exchange side plate located between the first heat exchange side plate and the last heat exchange side plate is defined as the intermediate heat exchange side plate.

[0012] The liquid inlets of the adjacent first heat exchange side plate and the intermediate heat exchange side plate, as well as the liquid inlets of the adjacent intermediate heat exchange side plate and the last heat exchange side plate, are all connected through the first two-way valve, the first pipe, and the first three-way valve.

[0013] In some embodiments, the first two-way valve is provided with a first flow limiting structure, which is used to regulate the flow rate of the heat exchange fluid input into the first or last heat exchange side plate, and the first three-way valve is provided with a second flow limiting structure, which is used to regulate the flow rate of the heat exchange fluid input into the intermediate heat exchange side plate.

[0014] In some embodiments, the second piping unit includes a plurality of second two-way valves, at least one second three-way valve, a plurality of second pipes, and an outlet pipe, wherein the outlet pipe is connected between a second pipe and the first flow channel;

[0015] The liquid outlets of the adjacent first heat exchange side plate and the intermediate heat exchange side plate, as well as the liquid outlets of the adjacent intermediate heat exchange side plate and the last heat exchange side plate, are connected by the second two-way valve, the second pipe, and the second three-way valve.

[0016] In some embodiments, in the flow direction of the heat exchange fluid in the first flow channel, the position where the inlet pipe communicates with the first flow channel is located upstream of the position where the outlet pipe communicates with the first flow channel.

[0017] In some embodiments, the piping assembly further includes a connector unit, which includes a plurality of connection connectors, each corresponding to one of the heat exchange side plates;

[0018] The connecting joint includes a main body, a plug, a first water nozzle, and a second water nozzle. The main body has a flow collection groove. The plug is inserted into the flow collection groove and divides the flow collection groove into a first sub-groove and a second sub-groove. The first water nozzle is connected between the first sub-groove and the first pipe unit, and the second water nozzle is connected between the second sub-groove and the second pipe unit.

[0019] One end of the heat exchange side plate, which has an inlet and an outlet, is inserted into the collection groove of the corresponding connecting joint and is sealed to the main body. The heat exchange side plate abuts against the plug plate. The inlet of the heat exchange side plate is located in the first sub-groove, and the outlet of the heat exchange side plate is located in the second sub-groove.

[0020] In some embodiments, the main body has a slot that communicates with the collection channel, and the plug is inserted into the slot and sealed to the slot.

[0021] In some embodiments, the plug has a slot, and the heat exchange side plate is inserted into the slot and abuts against the slot wall.

[0022] A battery comprising:

[0023] The heat exchange structure as described in any of the above embodiments; and

[0024] Battery cells are arranged one-to-one within the heat exchange area.

[0025] In the aforementioned heat exchange structure and battery, the first pipe unit is directly connected to the inlet of the first flow channel and each of the second flow channels, and the second pipe unit is directly connected to the outlet of the first flow channel and each of the second flow channels. In this way, a portion of the heat exchange fluid supplied from the heat exchange fluid source flows through the first flow channel, while the remaining portion is distributed through the first pipe unit to the second flow channels of each heat exchange side plate. After heat exchange, the fluid returns to the first flow channel through the second pipe unit and merges with a portion of the heat exchange fluid in the first flow channel before being output. This design allows for the sharing of piping in the first flow channel, reducing space requirements and simplifying the structure. Furthermore, by setting up the first and second pipe units, with the first pipe unit directly connected to the inlet of the first flow channel and each of the second flow channels, and the second pipe unit directly connected to the outlet of the first flow channel and each of the second flow channels, a parallel connection can be formed between the heat exchange side plates. This ensures that the heat exchange fluid is evenly distributed within each heat exchange side plate. With all heat exchange side plates connected in parallel, the heat exchange efficiency of the heat exchange fluid will not decrease along the way. Under fast charging conditions, the heat exchange effect on both sides of the battery cell is better and the heat exchange efficiency is high. Attached Figure Description

[0026] Figure 1 This is an exploded view of a heat exchange structure in one embodiment of this application.

[0027] Figure 2 for Figure 1 A schematic diagram of the connecting joint in the heat exchange structure shown.

[0028] Icon labels:

[0029] 100. Heat exchange structure;

[0030] 10. Heat exchange side plate assembly; 11. Heat exchange side plate; 11a. First heat exchange side plate; 11b. Intermediate heat exchange side plate; 11c. Last heat exchange side plate; 20. Piping assembly; 21. First piping unit; 211. First two-way valve; 212. First three-way valve; 213. First pipe; 214. Liquid inlet pipe; 22. Second piping unit; 221. Second two-way valve; 222. Second pipe; 223. Second three-way valve; 224. Liquid outlet pipe; 23. Connector unit; 251. Connecting connector; 2511. Main body; 2511a. Collection groove; 2511b. First sub-groove; 2511c. Second sub-groove; 2511d. Slot; 2512. Plug; 2512a. Slot; 2513. First water nozzle; 2514. Second water nozzle; 30. Heat exchange base plate; 31. Heat exchange area;

[0031] X, the first direction; Y, the second direction. Detailed Implementation

[0032] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0033] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0034] Furthermore, the terms "first" and "second" are merely descriptive and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the liquid level of the first feature is higher than that of the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the liquid level of the first feature is lower than that of the second feature.

[0037] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0038] Currently, judging from market trends, battery applications are becoming increasingly widespread. Batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of battery applications, market demand is also constantly increasing.

[0039] Considering the safety and reliability of battery use, increasing the contact area between the heat exchange plate and the battery cells is receiving increasing attention. A common way to increase the contact area between the heat exchange plate and the battery cells is to use a method that can achieve heat dissipation from the battery cells while simultaneously accommodating bottom and side heat exchange. However, this method requires the use of a distributor to distribute the heat exchange fluid from the inlet and outlet pipe assembly to the side heat exchange plates for side heat exchange through multiple distribution pipes. The problems with this method are that the inlet and outlet pipe assembly and the distribution pipes occupy a large space and have a complex structure. Furthermore, when the heat exchange side plates are connected in series, the heat exchange efficiency of the heat exchange fluid decreases along the flow path, resulting in poor heat exchange performance and low heat exchange efficiency for the battery cells under fast charging conditions.

[0040] Please see Figure 1 To alleviate the above problems, this application provides a battery, which includes battery cells and a heat exchange structure 100. The heat exchange structure 100 includes a heat exchange base plate 30, a heat exchange side plate assembly 10, and a pipe assembly 20. The heat exchange base plate 30 has a first flow channel for supplying heat exchange fluid. The heat exchange side plate assembly 10 is disposed on the heat exchange base plate 30 and includes at least three heat exchange side plates 11 spaced apart along a first direction X. Each pair of adjacent heat exchange side plates 11 and the heat exchange base plate 30 together define a heat exchange region 31. The battery cells are correspondingly disposed within the heat exchange region 31. Each heat exchange side plate 11 has a second flow channel. The pipe assembly 20 includes a first pipe unit 21 and a second pipe unit 22. The first pipe unit 21 is directly connected to the inlet of the first flow channel and each second flow channel, and can output the heat exchange fluid in the first flow channel to each second flow channel. The second pipe unit 22 is directly connected to the outlet of the first flow channel and each second flow channel, and can output the heat exchange fluid after heat exchange in each second flow channel to the first flow channel.

[0041] The battery unit comprises multiple individual battery cells, which are connected in series, parallel, or mixed configurations. The battery units can be placed upright, on their side, or upside down within their respective heat exchange areas 31. Each battery cell is positioned one-to-one within its corresponding heat exchange area 31 and contacts the heat exchange side plate 11 and heat exchange base plate 30 that define the heat exchange areas 31, thereby enabling heat exchange on the bottom and sides of the battery unit with excellent heat exchange efficiency.

[0042] The heat exchange side plate 11 and the heat exchange base plate 30 can be profiles, or they can be stamped or blown plates.

[0043] Both the first and second flow channels are used for the flow of heat exchange fluid. The heat exchange fluid can be water, alcohol, or other fluids.

[0044] The inlet and outlet of the first flow channel are connected to an external heat exchange fluid source (a container storing heat exchange fluid) via pipelines. The first pipe unit 21 is directly connected to the inlet of the first flow channel and each of the second flow channels, and the second pipe unit 22 is directly connected to the outlet of the first flow channel and each of the second flow channels. In this way, a portion of the heat exchange fluid supplied from the heat exchange fluid source flows through the first flow channel, while the other portion is distributed through the first pipe unit 21 to the second flow channel of each heat exchange side plate 11. After heat exchange, the fluid returns to the first flow channel through the second pipe unit 22 and merges with a portion of the heat exchange fluid in the first flow channel before being output. The advantage of this design is that by simply setting up pipes to connect the heat exchange fluid source with the inlet and outlet of the first flow channel, the input and output of the heat exchange fluid in the first and second flow channels can be realized. This allows the pipe design of the first flow channel to be shared. Compared with the method of using a distributor to distribute the heat exchange fluid on the inlet and outlet pipe assembly through multiple branch pipes one by one, the space occupied is reduced and the structure is simple.

[0045] By setting up a first pipe unit 21 and a second pipe unit 22, with the first pipe unit 21 directly connected to the inlet of the first flow channel and each of the second flow channels, and the second pipe unit 22 directly connected to the outlet of the first flow channel and each of the second flow channels, the heat exchange side plates 11 can be connected in parallel. This allows the heat exchange fluid to be evenly distributed within each heat exchange side plate 11. With the heat exchange side plates 11 connected in parallel, the heat exchange efficiency of the heat exchange fluid does not decrease along the flow path, resulting in better heat exchange on both sides of the battery cell under fast charging conditions and high heat exchange efficiency. Furthermore, because the heat exchange side plates 11 are connected in parallel, the pressure drop of the heat exchange fluid is small and the flow velocity is fast during the distribution of the heat exchange fluid to each heat exchange side plate 11, resulting in high heat exchange efficiency.

[0046] In actual heat exchange, under low-temperature conditions, such as winter operation, the temperature of the heat exchange fluid is higher than the temperature of the battery cell. The heat exchange fluid can provide heat to the battery cell to heat it. Under high-temperature conditions, such as summer operation, the temperature of the heat exchange fluid is lower than the temperature of the battery cell. The heat exchange fluid can absorb heat from the battery cell to cool it, thereby controlling the battery cell temperature.

[0047] In some embodiments, the heat exchange side plate 11 has a first end face disposed along a second direction Y intersecting the first direction X. An inlet and an outlet for the second flow channel in the heat exchange side plate 11 are formed on the first end face. The first pipe unit 21 and the second pipe unit 22 are located on the same side of the heat exchange side plate assembly 10 disposed along the second direction Y, and the first end face of the heat exchange side plate 11 faces the first pipe unit 21 and the second pipe unit 22. In this embodiment, the first end face facing the first pipe unit 21 and the second pipe unit 22 ensures that the inlet and outlet of the heat exchange side plate 11 are close to the first pipe unit 21 and the second pipe unit 22, resulting in a shorter and simpler pipeline design path, simplifying the battery structure and saving manufacturing costs.

[0048] In some embodiments, the first piping unit 21 includes a plurality of first two-way valves 211, at least one first three-way valve 212, a plurality of first pipes 213, and an inlet pipe 214, wherein the inlet pipe 214 is connected between a first pipe 213 and a first flow channel. The first heat exchange side plate 11 is defined as the first heat exchange side plate 11a, the last heat exchange side plate 11 is defined as the last heat exchange side plate 11c, and the heat exchange side plate 11 located between the first heat exchange side plate 11a and the last heat exchange side plate 11c is defined as the intermediate heat exchange side plate 11b; the inlets of adjacent first heat exchange side plates 11a and intermediate heat exchange side plates 11b, and the inlets of adjacent intermediate heat exchange side plates 11b and last heat exchange side plates 11c are all connected through the first two-way valves 211, the first pipes 213, and the first three-way valves 212.

[0049] If there are two or more intermediate side plates, each pair of adjacent intermediate heat exchange side plates 11b are connected by a first pipe 213 and two first three-way valves 212.

[0050] Specifically, the liquid inlets of the first heat exchange side plate 11a and the last heat exchange side plate 11c are connected to the first two-way valve 211, and the liquid inlet of the middle heat exchange side plate 11b is connected to the first three-way valve 212. In the first direction X, every two adjacent first two-way valves 211 and first three-way valves 212, as well as every two adjacent first three-way valves 212, are connected by a first pipe 213. Through the cooperation of all the first two-way valves 211, all the first three-way valves 212, and all the first pipes 213, the heat exchange fluid in the first flow channel can be distributed to all the heat exchange side plates 11. The pipeline layout of the first pipe unit 21 under this design is relatively simple, reducing the manufacturing cost of the battery.

[0051] In some embodiments, the first two-way valve 211 is provided with a first flow limiting structure, which is used to regulate the flow rate of the heat exchange fluid entering the first heat exchange side plate 11a or the last heat exchange side plate 11c. The first three-way valve 212 is provided with a second flow limiting structure, which is used to regulate the flow rate of the heat exchange fluid entering the intermediate heat exchange side plate 11b.

[0052] A first flow-limiting structure on a first two-way valve 211 connected to the inlet of the first heat exchanger side plate 11a is used to regulate the flow rate of the heat exchange fluid entering the first heat exchanger side plate 11a. A first flow-limiting structure on a first two-way valve 211 connected to the inlet of the last heat exchanger side plate 11c is used to regulate the flow rate of the heat exchange fluid entering the last heat exchanger side plate 11c. A second flow-limiting structure on a first three-way valve 212 connected to the inlet of the intermediate heat exchanger side plate 11b is used to regulate the flow rate of the heat exchange fluid entering the intermediate heat exchanger side plate 11b. Through the cooperation of the first and second flow-limiting structures, they can be adjusted to appropriate positions so that the heat exchange fluid in the inlet pipe 214 can be evenly distributed to each heat exchanger side plate 11, resulting in a more uniform distribution of heat exchange fluid in each heat exchanger side plate 11, and enabling uniform heat exchange in the heat exchanger side plate assembly 10.

[0053] In some embodiments, the second piping unit 22 includes a plurality of second two-way valves 221, at least one second three-way valve 223, a plurality of second pipes 222, and an outlet pipe 224, the outlet pipe 224 being connected between a second pipe 222 and a first flow channel. The outlets of adjacent first heat exchange side plates 11a and intermediate heat exchange side plates 11b, and the outlets of adjacent intermediate heat exchange side plates 11b and last heat exchange side plates 11c are all connected by the second two-way valves 221, the second pipes 222, and the second three-way valves 223.

[0054] If there are two or more intermediate side plates, each pair of adjacent intermediate heat exchange side plates 11b are connected by a second pipe 222 and two second three-way valves 223.

[0055] Specifically, the outlets of the first heat exchange side plate 11a and the last heat exchange side plate 11c are connected to second two-way valves 221, and the outlet of the middle heat exchange side plate 11b is connected to a second three-way valve 223. In the first direction X, every two adjacent second two-way valves 221 and second three-way valves 223, as well as every two adjacent second three-way valves 223, are connected by second pipes 222. Through the cooperation of all second two-way valves 221, all second three-way valves 223, and all second pipes 222, the heat exchange fluid after heat exchange in each heat exchange side plate 11 can converge and return to the first flow channel. The pipeline layout of the second pipe unit 22 under this design is relatively simple, reducing the manufacturing cost of the battery.

[0056] In some embodiments, in the flow direction of the heat exchange fluid in the first flow channel, the position where the inlet pipe 214 communicates with the first flow channel is located upstream of the position where the outlet pipe 224 communicates with the first flow channel.

[0057] Taking a battery operating at high temperatures as an example, in the flow direction of the first flow channel, the heat exchange time of the heat exchange fluid flowing upstream is shorter than that of the heat exchange fluid flowing downstream. Therefore, the temperature of the heat exchange fluid upstream is lower than that of the heat exchange fluid downstream. Thus, when the heat exchange fluid from the upstream is introduced into the second flow channel of the heat exchange side plate 11 through the inlet pipe 214, the heat exchange fluid still maintains a lower temperature and can cool the battery cell from the side, resulting in better cooling. Afterwards, the heat exchange fluid flows back into the first flow channel through the outlet pipe 224, merges with the heat exchange fluid in the first flow channel, and continues to flow.

[0058] Please refer to it again. Figure 1 And see also Figure 2 In some embodiments, the pipe assembly 20 further includes a connector unit 23, which includes a plurality of connecting connectors 251, each corresponding to a heat exchange side plate 11. The connecting connector 251 includes a main body 2511, a plug 2512, a first water nozzle 2513, and a second water nozzle 2514. The main body 2511 has a flow collecting groove 2511a. The plug 2512 is inserted into the flow collecting groove 2511a and divides the flow collecting groove 2511a into a first sub-groove 2511b and a second sub-groove 2511c. The first water nozzle 2513 is connected between the first sub-groove 2511b and the first pipe unit 21, and the second water nozzle 2514 is connected between the second sub-groove 2511c and the second pipe unit 22. One end of the heat exchange side plate 11, which has a liquid inlet and a liquid outlet, is inserted into the collection groove 2511a of the corresponding connecting joint 251 and is sealed to the main body 2511. The heat exchange side plate 11 abuts against the plug 2512. The liquid inlet of the heat exchange side plate 11 is located in the first sub-groove 2511b, and the liquid outlet of the heat exchange side plate 11 is located in the second sub-groove 2511c.

[0059] The blocking plate 2512 is used to separate the heat exchange fluid input before heat exchange and the heat exchange fluid output after heat exchange in the collecting groove 2511a, so as to avoid the heat exchange fluid input before heat exchange and the heat exchange fluid output after heat exchange mixing and affecting the heat exchange effect.

[0060] The heat exchange side plate 11 and the corresponding connecting joint 251 body 2511 can be sealed and connected by means of gaskets, sealant, welding or other methods.

[0061] Taking the connection between the intermediate heat exchange side plate 11b and the first pipe unit 21, the second pipe unit 22 and the connecting joint 251 as an example, the heat exchange fluid enters the second flow channel of the intermediate side plate through the first three-way valve 212, the first water nozzle 2513 and the first sub-slot 2511b, and is output through the second sub-slot 2511c, the second water nozzle 2514 and the second three-way valve 223 after heat exchange.

[0062] Taking the connection between the first heat exchange side plate 11a and the first pipe unit 21, the second pipe unit 22 and the connecting joint 251 as an example, the heat exchange fluid is input into the second flow channel of the first heat exchange side plate 11a through the first two-way valve 211, the first water nozzle 2513 and the first sub-slot 2511b, and is output through the second sub-slot 2511c, the second water nozzle 2514 and the second two-way valve 221 after heat exchange.

[0063] It can be seen that the connection joint 251 facilitates the connection between each heat exchange side plate 11 and the first pipe unit 21 and the second pipe unit 22, which is beneficial to the distribution and output of heat exchange fluid.

[0064] Furthermore, in some embodiments, the main body 2511 has a slot 2511d, which communicates with the collection channel 2511a. The plug 2512 is inserted into the slot 2511d and sealed to it. The slot 2511d facilitates the installation and positioning of the plug 2512, thereby preventing displacement between the plug 2512 and the slot 2511d during subsequent welding, and improving the reliability and accuracy of the plug 2512 installation.

[0065] Furthermore, in some embodiments, the plug 2512 has a slot 2512a, into which the heat exchange side plate 11 is inserted and abuts against the wall of the slot 2512a. The slot 2512a facilitates the installation and positioning of the heat exchange side plate 11 and the connecting joint 251, so as to facilitate the subsequent sealing connection of the connecting joint 251 and the heat exchange side plate 11.

[0066] In the aforementioned heat exchange structure 100 and battery, the first pipe unit 21 is directly connected to the inlet of the first flow channel and each of the second flow channels, and the second pipe unit 22 is directly connected to the outlet of the first flow channel and each of the second flow channels. In this way, a portion of the heat exchange fluid supplied from the heat exchange fluid source flows through the first flow channel, while the other portion is distributed through the first pipe unit 21 to the second flow channels of each heat exchange side plate 11. After heat exchange, the fluid returns to the first flow channel through the second pipe unit 22 and merges with a portion of the heat exchange fluid in the first flow channel before being output. This design allows for the sharing of the first flow channel's piping, reducing space requirements and simplifying the structure. Furthermore, by setting the first pipe unit 21 and the second pipe unit 22, with the first pipe unit 21 directly connected to the inlet of the first flow channel and each of the second flow channels, and the second pipe unit 22 directly connected to the outlet of the first flow channel and each of the second flow channels, a parallel connection can be formed between the heat exchange side plates 11. This ensures that the heat exchange fluid is evenly distributed within each heat exchange side plate 11. With all heat exchange side plates 11 connected in parallel, the heat exchange efficiency of the heat exchange fluid will not decrease along the way. Under fast charging conditions, the heat exchange effect on both sides of the battery cell is better and the heat exchange efficiency is high.

[0067] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A heat exchange structure, characterized in that, The heat exchange structure includes: The heat exchange base plate (30) has a first flow channel for the flow of heat exchange fluid; A heat exchange side plate assembly (10) is disposed on the heat exchange base plate (30) and includes at least three heat exchange side plates (11) spaced apart along a first direction (X). Each pair of adjacent heat exchange side plates (11) together with the heat exchange base plate (30) defines a heat exchange area (31). Each heat exchange side plate (11) has a second flow channel. The pipe assembly (20) includes a first pipe unit (21) and a second pipe unit (22). The first pipe unit (21) is directly connected to the inlet of the first flow channel and each of the second flow channels, and is able to output the heat exchange fluid in the first flow channel to each of the second flow channels. The second pipe unit (22) is directly connected to the outlet of the first flow channel and each of the second flow channels, and is able to output the heat exchange fluid after heat exchange in each of the second flow channels to the first flow channel.

2. The heat exchange structure according to claim 1, characterized in that, The heat exchange side plate (11) has a first end face arranged along a second direction (Y) intersecting the first direction (X). The first end face is provided with an inlet and an outlet of the second flow channel in the heat exchange side plate (11). The first pipe unit (21) and the second pipe unit (22) are located on the same side of the heat exchange side plate group (10) arranged along the second direction (Y), and the first end face of the heat exchange side plate (11) is arranged facing the first pipe unit (21) and the second pipe unit (22).

3. The heat exchange structure according to claim 2, characterized in that, The first pipeline unit (21) includes a plurality of first two-way valves (211), at least one first three-way valve (212), a plurality of first pipelines (213) and an inlet pipe (214), wherein the inlet pipe (214) is connected between a first pipeline (213) and the first flow channel; The first heat exchange side plate (11) is defined as the first heat exchange side plate (11a), the last heat exchange side plate (11) is defined as the last heat exchange side plate (11c), and the heat exchange side plate (11) located between the first heat exchange side plate (11a) and the last heat exchange side plate (11c) is defined as the middle heat exchange side plate (11b). The liquid inlets of the adjacent first heat exchange side plate (11a) and the intermediate heat exchange side plate (11b), as well as the liquid inlets of the adjacent intermediate heat exchange side plate (11b) and the last heat exchange side plate (11c), are all connected by the first two-way valve (211), the first pipe (213), and the first three-way valve (212).

4. The heat exchange structure according to claim 3, characterized in that, The first two-way valve (211) is provided with a first flow limiting structure, which is used to regulate the flow rate of the heat exchange fluid input into the first heat exchange side plate (11a) or the last heat exchange side plate (11c). The first three-way valve (212) is provided with a second flow limiting structure, which is used to regulate the flow rate of the heat exchange fluid input into the intermediate heat exchange side plate (11b).

5. The heat exchange structure according to claim 3, characterized in that, The second pipeline unit (22) includes a plurality of second two-way valves (221), at least one second three-way valve (223), a plurality of second pipelines (222) and an outlet pipe (224), wherein the outlet pipe (224) is connected between a second pipeline (222) and the first flow channel; The outlets of the adjacent first heat exchange side plate (11a) and the intermediate heat exchange side plate (11b), as well as the outlets of the adjacent intermediate heat exchange side plate (11b) and the last heat exchange side plate (11c), are connected by the second two-way valve (221), the second pipe (222), and the second three-way valve (223).

6. The heat exchange structure according to claim 5, characterized in that, In the flow direction of the heat exchange fluid in the first flow channel, the position where the inlet pipe (214) communicates with the first flow channel is upstream of the position where the outlet pipe (224) communicates with the first flow channel.

7. The heat exchange structure according to claim 2, characterized in that, The pipe assembly (20) further includes a connector unit (23), which includes multiple connecting connectors (251), and the connecting connectors (251) correspond one-to-one with the heat exchange side plate (11); The connecting joint (251) includes a main body (2511), a plug (2512), a first water nozzle (2513), and a second water nozzle (2514). The main body (2511) has a flow collection groove (2511a). The plug (2512) is inserted into the flow collection groove (2511a) and divides the flow collection groove (2511a) into a first sub-groove (2511b) and a second sub-groove (2511c). The first water nozzle (2513) is connected between the first sub-groove (2511b) and the first pipe unit (21). The second water nozzle (2514) is connected between the second sub-groove (2511c) and the second pipe unit (22). The heat exchange side plate (11) with an inlet and an outlet is inserted into the collection groove (2511a) of the corresponding connecting joint (251) and sealed to the main body (2511). The heat exchange side plate (11) abuts against the plug (2512). The inlet of the heat exchange side plate (11) is located in the first sub-groove (2511b), and the outlet of the heat exchange side plate (11) is located in the second sub-groove (2511c).

8. The heat exchange structure according to claim 7, characterized in that, The main body (2511) has a slot (2511d) which is connected to the collection groove (2511a). The plug (2512) is inserted into the slot (2511d) and is sealed to the slot (2511d).

9. The heat exchange structure according to claim 7, characterized in that, The plug (2512) has a slot (2512a) and the heat exchange side plate (11) is inserted into the slot (2512a) and abuts against the groove wall of the slot (2512a).

10. A battery, characterized in that, include: The heat exchange structure as described in any one of claims 1 to 9 above; as well as The battery cells are arranged one-to-one in the heat exchange area (31).

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