Heat exchange plate, battery pack and vehicle

Abstract

Embodiments of the present application provide a heat exchange plate, a battery pack, and a vehicle. The heat exchange plate includes a first interface, a second interface, and a flow channel connecting the first interface and the second interface. The heat exchange plate is used for heating and cooling the battery, and the flow channel is used for flowing a working medium. When the heat exchange plate is used for cooling the battery, the working medium flows into the flow channel from the first interface and flows out from the second interface. When the heat exchange plate is used for heating the battery, the working medium flows into the flow channel from the second interface and flows out from the first interface. The heat exchange plate provided by the embodiments of the present application exchanges heat between the working medium and the battery. The area that is heated first when heating the battery is different from the area that is cooled first when cooling the battery by the heat exchange plate, improving the heat exchange uniformity of the heat exchange plate.

Description

Technical Field

[0001] This application belongs to the technical field of battery modules. Specifically, this application relates to a heat exchange plate, a battery pack, and a vehicle. Background Art

[0002] With the continuous enhancement of people's environmental awareness, more and more electric vehicles have come into people's view. As the main power component of electric vehicles, the battery plays a crucial role in the long-term stable operation of electric vehicles.

[0003] In the prior art, water is passed through a corrugated tube to cool or heat the battery. However, since the corrugated tube can only introduce water flow from a fixed inlet and discharge the water flow from a fixed outlet, that is, the same water flow direction is adopted during heating or cooling operations, the heat exchange components such as the corrugated tube are likely to cause the temperature of local positions of the battery to be too high or too low, reducing the stability and lifespan of battery use. Summary of the Invention

[0004] One object of this application is to provide a new technical solution for a heat exchange plate, a battery pack, and a vehicle, which can solve the problem of low heat exchange efficiency of traditional heat exchange plates.

[0005] According to the first aspect of this application, a heat exchange plate is provided, which is applied to a battery. The heat exchange plate includes:

[0006] A first interface, a second interface, and a flow channel connecting the first interface and the second interface;

[0007] The heat exchange plate is used for heat exchange of the battery, and the flow channel is used for circulating a working medium.

[0008] When the heat exchange plate is used to cool the battery, the working medium flows into the flow channel from the first interface and flows out from the second interface.

[0009] When the heat exchange plate is used to heat the battery, the working medium flows into the flow channel from the second interface and flows out from the first interface.

[0010] Optionally, it includes:

[0011] When the heat exchange plate is used to cool the battery, the working medium flows into from the first interface and preferentially flows through the first type of area.

[0012] When the heat exchange plate is used to heat the battery, the working medium flows into from the second interface and preferentially flows through the second type of area.

[0013] Among them, the first type of area is used to be correspondingly arranged with the battery pole column area, and the second type of area is used to be correspondingly arranged with the non-pole column area of the battery.

[0014] Optionally, the flow channel includes a first section of the flow channel connected to the first interface and a second section of the flow channel connected to the second interface;

[0015] When the heat exchange plate is used to cool the battery, the working fluid flows in from the first interface, successively flows through the first section of the flow channel and the second section of the flow channel, and then flows out from the second interface. And the flow channel length of the first section of the flow channel flowing through the first type of area is greater than the flow channel length flowing through the second type of area, and the flow channel length of the second section of the flow channel flowing through the first type of area is less than the flow channel length flowing through the second type of area;

[0016] When the heat exchange plate is used to heat the battery, the working fluid flows in from the second interface, successively flows through the second section of the flow channel and the first section of the flow channel, and then flows out from the first interface. And the flow channel length of the second section of the flow channel flowing through the first type of area is less than the flow channel length flowing through the second type of area, and the flow channel length of the first section of the flow channel flowing through the first type of area is greater than the flow channel length flowing through the second type of area.

[0017] Optionally, the ratio range of the length of the first section of the flow channel to the length of the second section of the flow channel is 0.5 - 5.

[0018] Optionally, the ratio range of the width of the second type of area to the width of the first type of area is 1 - 8.

[0019] Optionally, the ratio range of the width of the first type of area to the length of the battery is 0.1 - 0.4, and the ratio range of the width of the second type of area to the length of the battery is 0.1 - 0.6.

[0020] Optionally, the first interface and the second interface are located on the same side of the heat exchange plate.

[0021] Optionally, the heat exchange plate includes an inlet and outlet assembly, and the first interface and the second interface are located on the inlet and outlet assembly.

[0022] Optionally, the heat exchange plate includes a first type of area and a second type of area, and the flow channels are distributed in the first type of area and the second type of area;

[0023] The first type of area includes a first sub - area and a second sub - area;

[0024] The second type of area includes a first sub - domain, and the first sub - domain is located between the first sub - area and the second sub - area;

[0025] When the heat exchange plate is used to exchange heat with the battery, the working fluid circulates at least once in the first sub - area, the first sub - domain and the second sub - area;

[0026] The first type of region is configured to correspond to the battery terminal region, and the second type of region is configured to correspond to the non-terminal region of the battery.

[0027] Optionally, the first type of region includes a fourth sub-region;

[0028] The second type of region includes a second sub-domain;

[0029] When the heat exchange plate is used to cool the battery, the working fluid flows from the first interface through the fourth sub-region, the second sub-domain, and the fourth sub-region, and flows into the second interface from the fourth sub-region;

[0030] When the heat exchange plate is used to heat the battery, the working fluid flows from the second interface through the fourth sub-region, the second sub-domain, and the fourth sub-region, and flows into the first interface from the fourth sub-region.

[0031] Optionally, the first type of region includes a fourth sub-region and a second sub-region;

[0032] The second type of region includes a second sub-domain, and the second sub-domain is located between the fourth sub-region and the second sub-region;

[0033] When the heat exchange plate is used to cool the battery, the working fluid flows from the first interface into the fourth sub-region, the second sub-domain, and the second sub-region, and flows back from the second sub-region to the second sub-domain and the fourth sub-region and then into the second interface;

[0034] When the heat exchange plate is used to heat the battery, the working fluid flows from the second interface into the fourth sub-region, the second sub-domain, and the second sub-region, and flows back from the second sub-region to the second sub-domain and the fourth sub-region and then into the first interface.

[0035] Optionally, the heat exchange plate includes a first heat exchange module and a second heat exchange module, and both the first heat exchange module and the second heat exchange module include a first type of region and a second type of region;

[0036] The first type of region includes a third sub-region, a first sub-region, a fourth sub-region, and a second sub-region;

[0037] The second type of region includes a first sub-domain and a second sub-domain;

[0038] The first sub-domain is located between the third sub-region and the first sub-region, the second sub-domain is located between the fourth sub-region and the second sub-region, and the first sub-region is adjacent to the fourth sub-region.

[0039] Optionally, within the first heat exchange module, when the heat exchange plate is used to exchange heat with the battery, the working fluid circulates at least once in the flow channels within the third sub-region, the first sub-domain, and the first sub-region.

[0040] Optionally, within the second heat exchange module,

[0041] When the heat exchange plate is used to cool the battery, the working fluid flows into the first heat exchange module from the first interface, flows through the first heat exchange module into the fourth sub-region and the second sub-region, and flows from the fourth sub-region and the second sub-region into the second sub-domain, and then flows into the second interface;

[0042] When the heat exchange plate is used to heat the battery, the working fluid flows into the second sub-domain from the second interface, and flows from the second sub-domain into the fourth sub-region and the second sub-region, and then flows into the first interface.

[0043] Optionally, it includes:

[0044] The flow channel includes a flow splitting junction, the flow splitting junction includes a primary flow splitting junction, at least one of the primary flow splitting junctions is arranged in the first type of region, the primary flow splitting junction is arranged close to the first interface or the second interface, and the flow splitting junction splits the flow channel.

[0045] Optionally, the heat exchange plate includes a first heat exchange module and a second heat exchange module, and both the first heat exchange module and the second heat exchange module include the first type of region;

[0046] The first type of region of the first heat exchange module includes a third sub-region and a first sub-region, and the first type of region of the second heat exchange module includes a fourth sub-region and a second sub-region;

[0047] The primary flow splitting junction is arranged in the third sub-region, the flow splitting junction further includes a secondary flow splitting junction, and the secondary flow splitting junction is located in at least one of the first sub-region, the second sub-region, and the fourth sub-region.

[0048] Optionally, it includes:

[0049] A heat exchange region and a battery region, the heat exchange region is arranged surrounding the battery region, and the battery region is the battery projection region formed by the battery on the heat exchange plate,

[0050] The flow channel includes a first type of flow channel and a second type of flow channel;

[0051] The first type of flow channel is located in the heat exchange region, and the second type of flow channel is distributed in the battery region.

[0052] Optionally, the length of the first type of flow channel is less than that of the second type of flow channel, and / or the number of times the first type of flow channel divides is less than that of the second type of flow channel.

[0053] According to a second aspect of the present application, there is provided a heat exchange method for a heat exchange plate, which is applied to a battery. The heat exchange plate includes: a first interface, a second interface, and a flow channel connecting the first interface and the second interface;

[0054] The heat exchange plate is used to exchange heat for the battery, and the flow channel is used to circulate a working medium. The heat exchange method includes:

[0055] When the heat exchange plate is used to cool the battery, the working medium flows into the flow channel from the first interface and flows out from the second interface.

[0056] When the heat exchange plate is used to heat the battery, the working medium flows into the flow channel from the second interface and flows out from the first interface;

[0057] When the heat exchange plate is used to cool the battery, the working medium flows in from the first interface and preferentially flows through a first type of area;

[0058] When the heat exchange plate is used to heat the battery, the working medium flows in from the second interface and preferentially flows through a second type of area.

[0059] The temperature of the area of the battery corresponding to the second type of area is different from that of the area of the battery corresponding to the first type of area.

[0060] According to a second aspect of the present application, there is provided a battery pack including the heat exchange plate described in the first aspect.

[0061] Optionally, it includes a plurality of battery cores. Each battery core is provided with pole posts at both ends. The battery cores are distributed in a first direction, and the heat exchange plate is arranged on one side or both sides of the battery cores in a second direction.

[0062] Optionally, the direction of the connection line of the pole posts at both ends of the battery core is the third direction, and the first direction, the second direction, and the third direction are perpendicular to each other.

[0063] Optionally, the heat exchange plate is a bottom plate or an upper cover.

[0064] According to a third aspect of the present application, there is provided a vehicle including the heat exchange plate described in the first aspect; or,

[0065] including the battery pack described in the second aspect.

[0066] One technical effect of the present application is that:

[0067] An embodiment of the present application provides a heat exchange plate. Through the heat exchange between the working fluid and the battery, the heat exchange efficiency of the heat exchange plate can be improved. Moreover, when the heat exchange plate is used to cool or heat the battery, the flow direction of the working fluid in the flow channel can be flexibly switched, so that the area heated first when the heat exchange plate heats the battery is different from the area cooled first when the heat exchange plate cools the battery, improving the heat exchange temperature uniformity of the heat exchange plate.

[0068] Other features and advantages of the present application will become clear through the following detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0069] The drawings incorporated in the specification and constituting a part of the specification illustrate embodiments of the present application and, together with the description, are used to explain the principles of the present application.

[0070] Figure 1 A schematic diagram of the disassembly of a battery pack provided by an embodiment of the present invention;

[0071] Figure 2 A top view of a battery pack provided by an embodiment of the present invention;

[0072] Figure 3 Schematic diagrams of the flow direction (a) and partition (b) of a flow channel of a heat exchange plate provided by an embodiment of the present invention Figure 1 ;

[0073] Figure 4 Schematic diagrams of the flow direction (a) and partition (b) of a flow channel of a heat exchange plate provided by an embodiment of the present invention Figure 2 ;

[0074] Figure 5 A schematic diagram of a heat exchange plate provided by an embodiment of the present invention Figure 1 ;

[0075] Figure 6 A schematic diagram of a heat exchange plate provided by an embodiment of the present invention Figure 2 ;

[0076] Figure 7 A schematic diagram of the flow direction of a flow channel of a heat exchange plate provided by an embodiment of the present invention Figure 1 ;

[0077] Figure 8 A schematic diagram of the flow direction of a flow channel of a heat exchange plate provided by an embodiment of the present invention Figure 2 ;

[0078] Figure 9 A schematic diagram of the commutation structure of a heat exchange plate provided by an embodiment of the present invention;

[0079] Figure 10Schematic diagram of the branch and confluence structure of a heat exchange plate provided by an embodiment of the present invention;

[0080] Figure 11 Schematic diagram of the partition of a heat exchange plate provided by an embodiment of the present invention;

[0081] Figure 12 Schematic diagram of a battery pack provided by an embodiment of the present invention Figure 1 ;

[0082] Figure 13 Schematic diagram of a heat exchange plate provided by an embodiment of the present invention Figure 3 ;

[0083] Figure 14 For Figure 13 The enlarged view of part A in

[0084] Figure 15 Schematic diagram of a heat exchange plate provided by an embodiment of the present invention Figure 4 ;

[0085] Figure 16 Schematic diagram of the first heat exchange module of a heat exchange plate provided by an embodiment of the present invention;

[0086] Figure 17 Schematic diagram of the second heat exchange module of a heat exchange plate provided by an embodiment of the present invention.

[0087] Wherein:

[0088] 1. Battery cell; 11. First battery module; 12. Second battery module;

[0089] 2. Heat exchange plate; 21. Flow channel;

[0090] 211. Commutation junction; 2111. First type of commutation junction; 2112. Second type of commutation junction;

[0091] 212. Shunt junction; 2121. Primary shunt junction; 2122. Secondary shunt junction;

[0092] 22. Inlet and outlet assembly; 221. First interface; 222. Second interface; 26. First type of region; 261. First partition; 2611. First sub-region; 2612. Second sub-region; 262. Second partition; 2621. Third sub-region; 2622. Fourth sub-region; 27. Second type of region; 271. First sub-domain; 272. Second sub-domain;

[0093] 100. Main circuit circulation channel; 200. Second circulation channel; 300. Third circulation channel; 400. Fourth circulation channel;

[0094] 201. First heat exchange module; 202. Second heat exchange module. Detailed Implementation Modes

[0095] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that: Unless otherwise specifically stated, the relative arrangements, numerical expressions, and numerical values of the components and steps set forth in these embodiments do not limit the scope of the present application.

[0096] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way a limitation on the present application or its application or use.

[0097] Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the specification.

[0098] In all the examples shown and discussed herein, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values.

[0099] It should be noted that: Similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0100] The technical solution provides a heat exchange plate that can be used in an electric vehicle, and the heat exchange plate can provide good heat exchange for the battery. When the battery needs to be heated, it can transport the heat exchange agent with heat to various areas of the battery through the flow channels to heat the battery. When the battery needs to be cooled, it can reversely utilize the flow channels to transport the low-temperature heat exchange agent reversely through the flow channels to various areas of the battery to cool the battery.

[0101] The heat exchange plate provided by the technical solution aims to provide stable heat exchange performance for the battery of a new energy electric vehicle and provide a better temperature environment for the battery.

[0102] Refer to Figures 1 to 15 , an embodiment of the present application provides a heat exchange plate applied to a battery, and the heat exchange plate includes:

[0103] A first interface 221, a second interface 222, and a flow channel 21 connecting the first interface 221 and the second interface 222;

[0104] The heat exchange plate 2 is used for heat exchange of the battery, the flow channel is used for circulating a working medium, and the working medium can be a refrigerant such as R123a, R32, CO2, or water.

[0105] When the heat exchange plate 2 is used to cool the battery, for example, when the heat exchange plate 2 can cool the battery with a low-temperature working fluid, the working fluid flows into the flow channel 21 from the first interface 221 and flows out from the second interface 222; through the heat exchange between the battery and the phase change of the working fluid, the battery can be cooled effectively.

[0106] When the heat exchange plate 2 is used to heat the battery, for example, when the heat exchange plate 2 heats the battery with a high-temperature working fluid, the working fluid flows into the flow channel 21 from the second interface 222 and flows out from the first interface 221. Through the heat exchange between the battery and the phase change of the working fluid, the battery can be heated effectively. The heat exchange effect of the heat exchange plate 2 on the battery is improved, ensuring the long-term stable operation of the battery.

[0107] The heat exchange plate provided by the embodiment of the present application can improve the heat exchange efficiency of the heat exchange plate 2 through the heat exchange between the phase change of the working fluid and the battery. Moreover, when the heat exchange plate 2 is used to cool or heat the battery, the area that is heated first when the heat exchange plate heats the battery is different from the area that is cooled first when the heat exchange plate cools the battery, improving the heat exchange temperature uniformity of the heat exchange plate.

[0108] In addition, the flow channel 21 can be stamped in the heat exchange plate 2. The battery may include a plurality of battery cells. The forward (the flow direction of the working fluid in the flow channel) cooling and reverse (the flow direction of the working fluid in the flow channel) heating of the heat exchange plate 2 on the battery can improve the cooling and heating effects of the battery, ensure the temperature uniformity of the battery, and improve the heat exchange capacity of the heat exchange plate 2 for the battery.

[0109] The heat exchange plate 2 can be switched between two states: a cooling mode and a heating mode. In these two states, the heat exchange plate or the pump device will drive the working fluid to flow in the opposite direction, so as to achieve the purpose of preferentially exchanging heat in a certain area.

[0110] Optionally, it includes:

[0111] When the heat exchange plate 2 is used to cool the battery, the working fluid flows in from the first interface 221 and preferentially flows through the first type of area;

[0112] When the heat exchange plate 2 is used to heat the battery, the working fluid flows in from the second interface 222 and preferentially flows through the second type of area;

[0113] Among them, the first type of area 26 is used to be correspondingly arranged with the battery terminal area, and the second type of area 27 is used to be correspondingly arranged with the non-terminal area of the battery.

[0114] Specifically, when the heat exchange plate 2 is used for heat exchanging with the battery, the first type of region 26 can correspond to the region of the battery cell with relatively high heat generation, and the second type of region 27 can correspond to the region of the battery cell with relatively low heat generation. Since a pole post needs to be provided on the battery cell for electrical connection, the heat generation in the pole post region (the region near the pole post) of the battery cell during operation is relatively large, thus forming the above-mentioned battery pole post region; while the heat generation in the region of the battery cell body is relatively small, thus forming the above-mentioned non-pole post region (the region far from the pole post) of the battery; the first type of region 26 can be used to be correspondingly arranged with the pole post region on the battery, and the second type of region 27 is used to be correspondingly arranged with the non-pole post region of the battery cell body on the battery, so as to improve the heat exchange efficiency of the heat exchange plate 2.

[0115] When the heat exchange plate 2 is used for cooling the battery, at this time the overall temperature of the battery is relatively high, the working medium can adopt a low-temperature refrigerant. After the low-temperature working medium flows in from the first interface 221, it will preferentially flow through the first type of region, and thus can preferentially cool the battery pole post region with relatively large heat generation on the battery by the low-temperature working medium, so as to improve the heat exchange efficiency between the heat exchange plate and the battery pole post region. Then the working medium in the flow channel flows through the second type of region, so as to cool the non-pole post region of the battery with relatively small heat generation on the battery, ensure the balance of heat exchange between the heat exchange plate and the battery, and maintain the uniform temperature of the battery during operation.

[0116] Specifically, when the heat exchange plate 2 is used for cooling the battery, the fact that the working medium preferentially flows through the first type of region can be that the flow channel length of the working medium flowing through the first type of region is greater than the flow channel length of the working medium flowing through the second type of region, or the flow rate of the working medium flowing through the first type of region is greater than the flow rate of the working medium flowing through the second type of region, so as to ensure that the cooling amount provided by the first type of region to the battery is greater than the cooling amount provided by the second type of region to the battery, so that the temperature of the first type of region and the temperature of the second type of region are close, and further ensure the uniform temperature of the heat exchange plate.

[0117] When the heat exchange plate 2 is used for heating the battery, at this time the overall temperature of the battery is relatively low, the working medium can adopt a high-temperature refrigerant. After the high-temperature working medium flows in from the second interface 222, it will preferentially flow through the second type of region, and thus can preferentially heat the non-pole post region of the battery with relatively lower temperature on the battery by the high-temperature working medium, so as to improve the heat exchange efficiency between the heat exchange plate and the battery pole post region. Then the working medium in the flow channel flows through the first type of region, so as to heat the battery pole post region with relatively low temperature on the battery, ensure the balance of heat exchange between the heat exchange plate and the battery, and further can maintain the uniform temperature of the battery during operation.

[0118] Specifically, when the heat exchange plate 2 is used to heat the battery, the working fluid preferentially flowing through the second type of area may be that the flow path length of the working fluid flowing through the second type of area is greater than the flow path length of the working fluid flowing through the first type of area, or the flow rate of the working fluid flowing through the second type of area is greater than the flow rate of the working fluid flowing through the first type of area, so as to ensure that the heating amount provided by the second type of area to the battery is greater than the heating amount provided by the first type of area to the battery, so that the temperature of the first type of area and the temperature of the second type of area are close, and further ensure the uniform temperature of the heat exchange plate.

[0119] It should be noted that the working fluid preferentially flowing through the first type of area or the second type of area in this application is not a limitation on the order of circulation before and after, but a correspondence between the heat exchange amount between the working fluid and the battery in the first type of area or the second type of area.

[0120] Optionally, the flow path includes a first section of the flow path connected to the first interface 221 and a second section of the flow path connected to the second interface;

[0121] When the heat exchange plate 2 is used to cool the battery, the working fluid flows in from the first interface 221, successively flows through the first section of the flow path and the second section of the flow path, and then flows out from the second interface, and the flow path length of the first section of the flow path flowing through the first type of area is greater than the flow path length of the first section of the flow path flowing through the second type of area, and the flow path length of the second section of the flow path flowing through the first type of area is less than the flow path length of the second section of the flow path flowing through the second type of area;

[0122] When the heat exchange plate 2 is used to heat the battery, the working fluid flows in from the second interface 222, successively flows through the second section of the flow path and the first section of the flow path, and then flows out from the first interface 221, and the flow path length of the second section of the flow path flowing through the first type of area is less than the flow path length of the second section of the flow path flowing through the second type of area, and the flow path length of the first section of the flow path flowing through the first type of area is greater than the flow path length of the first section of the flow path flowing through the second type of area.

[0123] Specifically, when the heat exchange plate 2 is used to cool the battery, the first section of the flow path may be the front section of the flow path, and the second section of the flow path may be the rear section of the flow path; the flow path length of the first section of the flow path flowing through the first type of area is greater than the flow path length of the first section of the flow path flowing through the second type of area, so that the low-temperature working fluid in the first section of the flow path can better exchange heat with the battery pole column area with greater heat generation on the battery; when the working fluid flows into the second section of the flow path, the heat exchange efficiency of the working fluid decreases. At this time, since the flow path length of the second section of the flow path flowing through the first type of area is less than the flow path length of the second section of the flow path flowing through the second type of area, the working fluid in the second section of the flow path can be used to exchange heat between the heat exchange plate and the non-pole column area of the battery with less heat generation, so as to make full use of the heat exchange efficiency of different stages of the flow path of the heat exchange plate and improve the heat exchange effect of the heat exchange plate.

[0124] When the heat exchange plate 2 is used to heat the battery, the second flow channel can be the front section of the flow channel, and the first flow channel can be the rear section of the flow channel; the length of the flow channel in the second flow channel passing through the first type of area is less than the length of the flow channel passing through the second type of area, so that the high-temperature working fluid in the second flow channel can better exchange heat with the non-pole-column area of the battery with a lower temperature on the battery; when the working fluid flows into the first flow channel, the heat exchange efficiency of the working fluid decreases. At this time, since the length of the flow channel in the first flow channel passing through the first type of area is greater than the length of the flow channel passing through the second type of area, the working fluid in the first flow channel can be used to exchange heat between the heat exchange plate and the battery pole-column area with a lower temperature on the battery, and the heat exchange effect of the heat exchange plate can also be improved.

[0125] In one embodiment, referring to Figure 5 , the first flow channel connected to the first interface 221 and the second flow channel connected to the second interface 222 form a circulation flow channel, and Figure 11 the area where the black solid line extends in can correspond to the first flow channel, and the flow channel between the end of the black solid line and the second interface can correspond to the second flow channel; obviously, the main extension and heat exchange stage of the first flow channel are in the first type of area, and the main extension and heat exchange stage of the second flow channel are in the second type of area.

[0126] Optionally, the ratio range of the length of the first flow channel to the length of the second flow channel is 0.5-5.

[0127] Specifically, the first flow channel is mainly used to realize heat exchange between the heat exchange plate and the battery pole-column area, and the second flow channel is mainly used to realize heat exchange between the heat exchange plate and the non-pole-column area of the battery; when the heat exchange plate exchanges heat with a battery with obvious heat generation in the pole-column area, the length of the first flow channel can be set to be greater than the length of the second flow channel. For example, the ratio a of the length of the first flow channel to the length of the second flow channel is set, 1 < a ≤ 3, such as: 1.2, 1.6, 2.0, 2.4, 2.6 or 2.8. Or the ratio a of the length of the first flow channel to the length of the second flow channel is set, 2 ≤ a ≤ 5, such as: 2.2, 2.6, 3.0, 3.4, 3.6, 3.8, 4.0, 4.4, 4.6 or 5. Or the ratio a of the length of the first flow channel to the length of the second flow channel is set, 3 ≤ a ≤ 5, 3.0, 3.4, 3.6, 3.8, 4.0, 4.4, 4.6 or 5; or the ratio a of the length of the first flow channel to the length of the second flow channel is set, 1 < a ≤ 2, such as: 1.2, 1.6 or 2.0. 2 ≤ a ≤ 4, such as: 2.2, 2.6, 3.0, 3.4, 3.6, 3.8 or 4.0; so as to realize that according to the heat exchange mode of the heat exchange plate for the battery, different areas can be preferentially heat-exchanged.

[0128] Optionally, the ratio range of the width of the second type of region to the width of the first type of region is 1-8.

[0129] Specifically, referring to Figure 5 , the second type of region 27 may include a first sub-region 271, the first type of region 26 includes a third sub-region 2621 and a first sub-region 2611, and the first sub-region 271 is located between the third sub-region 2621 and the first sub-region 2611. The width of the second type of region may include the width H2 of the first sub-region 271, the width of the first type of region may include the width H1 of the third sub-region 2621 and the width H3 of the first sub-region 2611, and the width H1 of the third sub-region 2621 and the width H3 of the first sub-region 2611 may be equal or different.

[0130] Since the first type of region 26 is used to be correspondingly arranged with the terminal region on the battery, and the second type of region 27 is correspondingly arranged with the non-terminal region on the battery, the terminal region on the battery is mainly used for connecting the battery cells with external devices, while the non-terminal region on the battery is mainly used for arranging the battery cells. To ensure the capacity of the battery, the non-terminal region on the battery is larger than the terminal region on the battery. To achieve the correspondence between different regions on the heat exchange plate and the high and low temperature regions on the battery for heat exchange, the width of the second type of region can be set to be greater than the width of the first type of region. For example, the width H2 of the first sub-region 271 is greater than the width H1 of the third sub-region 2621. Specifically, the ratio of the width H2 of the first sub-region 271 to the width H1 of the third sub-region 2621 can be 2, 3, 4, 5 or 6, and / or the width H2 of the first sub-region 271 is greater than the width H3 of the first sub-region 2611. Specifically, the ratio of the width H2 of the first sub-region 271 to the width H3 of the first sub-region 2611 can be 4, 5, 6, 7 or 8, so as to improve the heat exchange flexibility of the heat exchange plate for the battery.

[0131] Optionally, the ratio range of the width of the first type of region to the length of the battery is 0.1-0.4, and the ratio range of the width of the second type of region to the length of the battery is 0.1-0.6.

[0132] Specifically, the battery terminal can be located at one end of the battery along its length direction, or the battery terminal can be located at both ends of the battery along its length direction; since the first type of region 26 is used to be correspondingly arranged with the battery terminal region, and the second type of region 27 is used to be correspondingly arranged with the non-terminal region of the battery, that is, the ratio of the width of the first type of region to the length of the battery corresponds to the ratio of the width of the terminal region to the length of the battery, while the ratio of the width of the second type of region to the length of the battery corresponds to the ratio of the width of the non-terminal region on the battery to the length of the battery. In order to increase the size of the battery cells arranged in the non-terminal region on the basis of ensuring the connection of the battery to the outside through the terminals, the ratio of the width of the second type of region to the length of the battery can be set to be greater than the ratio of the width of the first type of region to the length of the battery. For example, the ratio of the width of the first type of region to the length of the battery ranges from 0.1 to 0.4, and the ratio of the width of the second type of region to the length of the battery ranges from 0.1 to 0.6. In addition, when facing batteries of different sizes, the widths of the terminal region and the non-terminal region on the battery will also change accordingly, and then the ratio of the width of the first type of region to the length of the battery and the ratio of the width of the second type of region to the length of the battery will also be adjusted accordingly.

[0133] In one embodiment, when the heat exchange plate exchanges heat with a battery with a length of 1.2 m, the ratio of the width of the first type of region to the length of the battery ranges from 0.05 to 0.3, and the ratio of the width of the second type of region to the length of the battery ranges from 0.2 to 0.6.

[0134] In another embodiment, when the heat exchange plate exchanges heat with a battery with a length of 0.8 m, the ratio of the width of the first type of region to the length of the battery ranges from 0.3 to 0.4, and the ratio of the width of the second type of region to the length of the battery ranges from 0.1 to 0.4.

[0135] The first type of region can correspond to the high-temperature region on the battery. The high-temperature region on the battery can be the region with a large temperature change amplitude on the battery. For example, the high-temperature region is the region within the range of 5 - 10 °C higher than the normal operating temperature of the battery; while the second type of region can correspond to the low-temperature region on the battery. The low-temperature region on the battery can be the region with a relatively small temperature change amplitude on the battery. For example, the low-temperature region is the region within the range of 0 - 5 °C higher than the normal operating temperature of the battery.

[0136] Optionally, referring to Figure 3 and Figure 4 , the heat exchange plate 2 includes a first type of region 26 and a second type of region 27, and the flow channels 21 are distributed in the first type of region 26 and the second type of region 27;

[0137] When the heat exchange plate 2 is used to exchange heat with the battery, the working fluid circulates at least once in the first type of region 26 and the second type of region 27;

[0138] When the heat exchange plate 2 is used to cool the battery, the working fluid flows from the first interface 221 through the first type of region 26 and the second type of region 27, and flows into the second interface 222 from the second type of region 27;

[0139] When the heat exchange plate 2 is used to heat the battery, the working fluid flows from the second interface 222 through the second type of region 27 and the first type of region 26, and flows into the first interface 221 from the first type of region 26.

[0140] Specifically, when the heat exchange plate 2 cools the battery with a low-temperature working fluid, the working fluid flows into the heat exchange plate 2 from the first interface 221, then flows from the flow channel 21 in the first type of region 26 to the flow channel 21 in the second type of region 27, and finally flows out of the heat exchange plate 2 from the second interface 222; when the heat exchange plate 2 heats the battery with a high-temperature working fluid, the working fluid flows into the heat exchange plate 2 from the second interface 222, then flows from the flow channel 21 in the second type of region 27 to the flow channel 21 in the first type of region 26, and finally flows out of the heat exchange plate 2 from the first interface 221, improving the heat exchange effect of the heat exchange plate 2 on the battery and ensuring the long-term stable operation of the battery.

[0141] When the heat exchange plate 2 is in the cooling mode, the flow channel 21 is designed such that the working fluid can flow from the first type of region 26 to the second type of region 27. That is, the design of the flow channel 21 enables the working fluid to first flow into the flow channel in the first type of region 26 and then flow to the flow channel in the second type of region 27. In this way, the working fluid can first exchange heat in the first type of region 26, and the working fluid preferentially absorbs the heat generated by the battery corresponding to the first type of region 26. After that, the heat exchange capacity of the working fluid will decrease. The working fluid then flows to the second type of region 27 to exchange the heat generated by the battery corresponding to this region. Finally, the working fluid will flow to the second interface 222 and flow out of the heat exchange plate 2.

[0142] On the contrary, when the heat exchange plate 3 is in the heating mode, the flow channel 21 is designed such that the working fluid can flow from the second type of region 27 to the first type of region 26. That is, the design of the flow channel enables the working fluid to first flow into the flow channel in the second type of region 27 and then flow to the flow channel in the first type of region 26 when the working fluid flows in the reverse direction. The working fluid can first exchange heat with the second type of region 27 and dissipate the heat to the space where the battery corresponding to the second type of region 27 is located. After that, the heat exchange capacity of the working fluid decreases and it flows into the first type of region 26. The working fluid dissipates the remaining heat in the first type of region 26 to the space where the battery is located, and then flows back to the first interface 221 and flows out of the heat exchange plate 2.

[0143] In order to improve the heat exchange efficiency between the working fluid and the battery when the working fluid flows in the first type of region 26 and the second type of region 27, the flow channels 21 in the first type of region 26 and the second type of region 27 can be set as circulating flow channels. For example, the flow channel 21 undergoes one or more reversals in the first type of region 26, or the flow channel 21 undergoes one or more reversals in the second type of region 27. Alternatively, the flow channel 21 undergoes reversals in both the first type of region 26 and the second type of region 27 and then bends to form a circulating flow channel with one or more loops, so as to enable the working fluid to perform one or multiple cycles of flow in the first type of region 26 and the second type of region 27, and improve the heat exchange efficiency of the heat exchange plate 2.

[0144] For example, the first type of region 26 and the second type of region 27 are arranged adjacent to each other. The first interface 221 is arranged close to the first type of region 26, and the second interface 222 is arranged close to the second type of region 27. When the heat exchange plate 2 is used to cool the battery, the working fluid flows from the first interface 221 through the first type of region 26 and the second type of region 27. The working fluid can form a circulating flow after bending and reversing in the first type of region 26, or the working fluid forms a circulating flow after bending and reversing in the second type of region 27, and finally flows into the second interface 222 from the second type of region 27, so that the working fluid performs at least one cycle of flow in the first type of region 26 and the second type of region 27.

[0145] When the heat exchange plate 2 is used to heat the battery, the working fluid flows from the second interface 222 through the second type of region 27 and the first type of region 26. The working fluid can form a circulating flow after bending and reversing in the second type of region 27, or the working fluid forms a circulating flow after bending and reversing in the first type of region 26, and finally flows into the first interface 221 from the first type of region 26, so that the working fluid performs at least one cycle of flow in the first type of region 26 and the second type of region 27.

[0146] Optionally, at least part of the flow channels 21 are curved flow channels.

[0147] Specifically, when the working fluid flows in the heat exchange plate 2, in order to make full use of the heat exchange effect of the working fluid during phase change and prevent the working fluid from flowing straight in and out in the flow channel 21, the flow channels 21 in the first type of region 26 and the second type of region 27 can be set as curved flow channels. For example, the flow channels 21 in the first type of region 26 and the second type of region 27 are set as circulating figure-eight flow channels or circular flow channels, so as to increase the length of the flow channels 21 in the heat exchange plate 2, thereby increasing the effective heat exchange area of the heat exchange plate 2 and enhancing the heat exchange amount of the heat exchange plate 2 to the battery.

[0148] Optionally, refer toFigure 5 The first interface 221 and the second interface 222 are located on the same side of the heat exchange plate 2.

[0149] Specifically, the shape of the heat exchange plate 2 can match the shape structure of the battery (which can refer to the shape of the large surface of the battery). For example, when heat exchanging with a square battery, the heat exchange plate 2 can be set as square, and when heat exchanging with a rhombic battery, the heat exchange plate 2 can be set as rhombic, so as to ensure sufficient heat exchange between the heat exchange plate 2 and the battery after fitting. When the first interface 221 and the second interface 222 are located on the same side of the heat exchange plate 2, whether the working fluid enters the heat exchange plate from the first interface 221 or from the second interface 222, the working fluid can flow to other sides (different from the side where the first interface 221 and the second interface 222 are set) and the middle area of the heat exchange plate 2 in the heat exchange plate 2, which is convenient for the working fluid to form a circulating flow in the heat exchange plate 2 and improves the heat exchange amount of the heat exchange plate 2 to the battery.

[0150] In a specific embodiment, the shape of the heat exchange plate 2 is rectangular to match a rectangular battery, and the first interface 221 and the second interface 222 are located on a short side of the heat exchange plate 2 and are close to each other. When the working fluid enters the heat exchange plate 2 from the first interface 221 or the second interface 222, the working fluid can flow to the two long sides, the other short side and the middle area of the heat exchange plate 2, and finally flow out of the heat exchange plate 2 from the second interface 222 or the first interface 221 to form a circulating flow of the working fluid in the heat exchange plate 2.

[0151] Optionally, refer to Figure 13 and Figure 14 The heat exchange plate 2 includes an inlet and outlet assembly 22, and the first interface 221 and the second interface 222 are located on the inlet and outlet assembly 22.

[0152] Specifically, the inlet and outlet assembly 22 has a first interface 221 and a second interface 222, and the first interface 221 and the second interface 222 are respectively communicated with both ends of the flow channel 21. The first interface 221 and the second interface 222 can be used to connect the heat exchange plate 2 with components that provide the working fluid externally. For example, an external pump body can be connected to the heat exchange plate 2 through the first interface 221 and the second interface 222 to ensure the flow stability of the working fluid in the heat exchange plate 2.

[0153] Optionally, refer to Figure 3 and Figure 4 The heat exchange plate includes a first type of area 26 and a second type of area 27, and the flow channels are distributed in the first type of area 26 and the second type of area 27;

[0154] The first type of region 26 includes a first sub-region 261 and a second sub-region 262;

[0155] The second type of region 27 includes a first sub-domain 271, and the first sub-domain 271 is located between the first sub-region 261 and the second sub-region 262;

[0156] When the heat exchange plate 2 is used to heat the battery, the working fluid circulates at least once in the first sub-region 261, the first sub-domain 271, and the second sub-region 262;

[0157] The first type of region 26 is used to be correspondingly arranged with the battery terminal region, and the second type of region 27 is used to be correspondingly arranged with the non-terminal region of the battery.

[0158] Specifically, in order to improve the heat exchange efficiency between the working fluid and the battery when flowing in the first sub-region 261, the first sub-domain 271, and the second sub-region 262, the flow channels 21 in the first sub-region 261, the first sub-domain 271, and the second sub-region 262 can be set as circulating flow channels. For example, the flow channels 21 are bent after multiple turnarounds in the first sub-region 261, the first sub-domain 271, and the second sub-region 262 to form one or more loops of circulating flow channels, so as to realize one or multiple circulations of the working fluid in the first sub-region 261, the first sub-domain 271, and the second sub-region 262, and improve the heat exchange efficiency of the heat exchange plate 2.

[0159] When the heat exchange plate 2 is used to heat the battery, the first type of region 26 corresponds to the region where the battery cells generate relatively high heat, and the second type of region 27 corresponds to the region where the battery cells generate relatively low heat. In Figure 5 and Figure 6 In the shown embodiment, the battery cells can be arranged in two rows side by side. Since the terminals are usually provided at both ends of the cells for electrical connection, the heat generation of the terminal regions at both ends of the battery formed by the cells is relatively large, while the heat generation of the region of the middle cell body is relatively small. The first type of region 26 can be used to be correspondingly arranged with the terminal regions at both ends of the battery, and the second type of region 27 is used to be correspondingly arranged with the non-terminal region in the middle of the battery.

[0160] Furthermore, the terminal region of the battery can include a positive electrode position and a negative electrode position, and the positive electrode position and the negative electrode position are respectively located at both ends of the battery, so that the first sub-region 261 is opposite to the positive electrode position, and the second sub-region 262 is opposite to the negative electrode position.

[0161] In one embodiment, when the heat exchange plate 2 cools the battery through a working fluid, the working fluid flows from the flow channels 21 of the mutually distant first partition 261 and second partition 262 to the flow channels 21 of the second type of region 27 simultaneously (at this time, the flow channels 21 of the first partition 261 and the second partition 262 may respectively have independent working fluid inlets); the working fluid at this time can be a low-temperature working fluid. The low-temperature working fluid first cools the positions of the positive electrode and the negative electrode on the battery where more heat is generated, and then cools other regions on the battery to ensure the uniform temperature of the battery.

[0162] When the heat exchange plate 2 heats the battery through a working fluid, the working fluid flows from the flow channels 21 of the second type of region 27 to the flow channels 21 of the first partition 261 and the second partition 262. The working fluid at this time can be a high-temperature working fluid. The high-temperature working fluid first heats the regions on the battery other than the positions of the positive electrode and the negative electrode where less heat is generated, and then heats the positions of the positive electrode and the negative electrode on the battery to ensure the uniform temperature of the battery.

[0163] In another embodiment, when the heat exchange plate 2 cools the battery through a working fluid, the working fluid can flow from the flow channels 21 of the first partition 261 to the flow channels 21 of the second partition (at this time, the flow channels 21 of the first partition 261 and the second partition 262 may share a working fluid inlet), and flow from the flow channels 21 of the second partition 262 to the flow channels 21 of the second type of region 27.

[0164] Specifically, the working fluid flowing through the first partition 261 and the second partition 262 will converge to the flow channels 21 of the second type of region 27. When the heat exchange requirement of the first partition 261 is higher than that of the second partition 262, the working fluid in the first partition 261 can first flow through the second partition 262 and then flow to the second partition 262, while the working fluid in the second partition 262 can directly flow to the flow channels 21 of the second type of region 27 to improve the heat exchange flexibility of the heat exchange plate 2 in the battery.

[0165] In one embodiment, Figure 3 The left longitudinal area in the middle belongs to the second partition 262 of the first type of region 26, the middle longitudinal area belongs to the first sub-region 271 of the second type of region 27, and the right longitudinal area also belongs to the first partition 261 of the first type of region 26, so as to be correspondingly arranged with the regions where the battery generates more heat in the first type of region 26, and the second type of region 27 is correspondingly arranged with the regions where the battery generates less heat, ensuring the heat exchange amount of the heat exchange plate 2 for the battery.

[0166] Moreover, the first interface 221 and the second interface 222 are disposed on a side of the first partition 261 away from the second partition 262, such that the working fluid can flow into the heat exchange plate sequentially through the first partition 261, the first sub-region 271, and the second partition 262. Since both the first partition 261 and the second partition 262 belong to regions where the corresponding battery generates relatively large heat, the first partition 261 and the second partition 262 can be interchanged in terms of structure and function. For example, by disposing the first interface 221 and the second interface 222 on a side of the second partition 262 away from the first partition 261, efficient heat exchange between the heat exchange plate 2 and the battery can also be achieved. Moreover, the interchange of the first type of regions 26 on both sides of the second type of region 27 can also be applied to the structure of the heat exchange plate 2 formed by multiple groups of the first type of regions 26 and the second type of regions 27.

[0167] In addition, the heat generation condition of the battery cell is usually constant. Regardless of the external environment and whether the battery is in a discharging or charging state, the parts of the cell where the pole posts and electrical connection points are provided are always regions with relatively high heat generation. As Figure 2 shown, the middle region of the cell has moderate and less heat generation, that is, the parts of the cell where no electrical connection points and pole posts are provided are not prone to heat generation. When heating is required, the region of the cell where no pole post is provided is usually colder and requires more temperature rise. When cooling is required, the region of the cell where the pole post is provided is usually hotter and requires more cooling. The advantage of this part of the design solution is that it utilizes the working characteristics of the cell in the battery and arranges the flow channels of the heat exchange plate according to the regions where different heat-generating structures are located. Moreover, the flow directions of the working fluid in the heating and cooling modes are opposite. When dissipating heat, the working fluid first flows through the flow channels to the region with higher heat, and when heating, the working fluid first flows through the flow channels to the region with lower heat. This enables the working fluid to maintain a high heat exchange efficiency with the regions of the battery that generate relatively large heat.

[0168] In cases where the battery cells adopt other arrangement methods, the cell electrical connection method adopts other methods, etc., the positions and quantities of the first type of regions 26 and the second type of regions 27 will be different. This technical solution takes Figure 3 and Figure 4 shown cases as examples, Figure 3 a and Figure 4 a are schematic diagrams of the flow direction of the flow channels of the heat exchange plate 2, Figure 3 b and Figure 4 b are schematic diagrams of the region division of the heat exchange plate 2 to illustrate the design characteristics of this part. Optionally, refer to Figure 3 ,

[0169] the first type of region 26 includes a fourth sub-region 2622,

[0170] the second type of region 27 includes a second sub-region 272;

[0171] When the heat exchange plate 2 is used to cool the battery, the working fluid flows from the first interface through the fourth sub-region 2622, the second sub-domain 272, and the fourth sub-region 2622, and flows into the second interface from the fourth sub-region 2622;

[0172] When the heat exchange plate 2 is used to heat the battery, the working fluid flows from the second interface through the fourth sub-region 2622, the second sub-domain 272, and the fourth sub-region 2622, and flows into the first interface from the fourth sub-region 2622.

[0173] Specifically, the heat exchange plate 2 may include an adjacent fourth sub-region 2622 and a second sub-domain 272, and the first interface 221 and the second interface 222 may be located on a side of the fourth sub-region 2622 away from the second sub-domain 272; the heat exchange plate 2 is used to exchange heat with a battery having a single-sided pole column.

[0174] When the heat exchange plate 2 is used to cool the battery, the working fluid flows from the first interface 221 through the fourth sub-region 2622, the second sub-domain 272, and the fourth sub-region 2622. The working fluid in the fourth sub-region 2622 can quickly cool a position on the battery with a large amount of heat generation, and then the working fluid in the second sub-domain 272 cools a position on the battery with a small amount of heat generation. Finally, the working fluid flows into the second interface 222 from the fourth sub-region 2622;

[0175] When the heat exchange plate 2 is used to heat the battery, the working fluid flows from the second interface through the fourth sub-region 2622, the second sub-domain 272, and the fourth sub-region 2622, and flows into the first interface from the fourth sub-region 2622.

[0176] In addition, the first interface 221 and the second interface 222 may also be located on the fourth sub-region 2622 and the second sub-domain 272 respectively, so that when the heat exchange plate 2 is used to cool the battery, the working fluid flows from the first interface 221 through the fourth sub-region 2622 and the second sub-domain 272, and when the heat exchange plate 2 is used to heat the battery, the working fluid flows from the second interface through the second sub-domain 272 and the fourth sub-region 2622, fully realizing that when cooling the battery, the low-temperature working fluid flows from the fourth sub-region 2622 opposite to the high-temperature region of the battery to the second sub-domain 272 opposite to the low-temperature region of the battery, and when heating the battery, the high-temperature working fluid flows from the second sub-domain 272 opposite to the low-temperature region of the battery to the fourth sub-region 2622 opposite to the high-temperature region of the battery.

[0177] Optionally, referring to Figure 3 , the first type of region 26 includes a fourth sub-region 2622 and a second sub-region 2612;

[0178] The second type of region 27 includes a second sub-region 272, and the second sub-region 272 is located between the fourth sub-region 2622 and the second sub-region 2612;

[0179] When the heat exchange plate 2 is used to cool the battery, the working fluid flows into the fourth sub-region 2622, the second sub-region 272, and the second sub-region 2612 from the first interface, and flows back from the second sub-region 2612 to the second sub-region 272 and the fourth sub-region 2622 and then into the second interface;

[0180] When the heat exchange plate 2 is used to heat the battery, the working fluid flows into the fourth sub-region 2622, the second sub-region 272, and the second sub-region 2612 from the second interface, and flows back from the second sub-region 2612 to the second sub-region 272 and the fourth sub-region 2622 and then into the first interface.

[0181] Specifically, the first interface 221 and the second interface 222 may be located on a side of the fourth sub-region 2622 away from the second sub-region 272; the heat exchange plate 2 is used to exchange heat with a battery having double-sided pole columns.

[0182] When the heat exchange plate 2 is used to cool the battery, the working fluid flows through the fourth sub-region 2622, the second sub-region 272, and the second sub-region 2612 from the first interface 221. The working fluid in the fourth sub-region 2622 and the second sub-region 2612 can quickly cool the positions on the battery with relatively large heat generation, and then the working fluid in the second sub-region 272 cools the positions on the battery with relatively small heat generation. Finally, it flows back from the second sub-region 2612 to the second sub-region 272 and the fourth sub-region 2622 and then into the second interface 222;

[0183] When the heat exchange plate 2 is used to heat the battery, the working fluid flows into the fourth sub-region 2622, the second sub-region 272, and the second sub-region 2612 from the second interface, and flows back from the second sub-region 2612 to the second sub-region 272 and the fourth sub-region 2622 and then into the first interface.

[0184] In addition, two first interfaces 221 may be provided. The two first interfaces 221 may be respectively located on the fourth sub-region 2622 and the second sub-region 2612, and the second interface 222 is provided on the second sub-region 272.

[0185] Optionally, the heat exchange plate includes a plurality of heat exchange modules, the working fluid circulates between the plurality of heat exchange modules, and the working fluid performs at least one cycle flow in each heat exchange module.

[0186] Specifically, refer to Figure 5 and Figure 6 , the heat exchange plate 2 includes a first heat exchange module and a second heat exchange module, the first heat exchange module and the second heat exchange module are arranged at intervals, and at least part of the flow channels 21 are bent within each of the first heat exchange module and the second heat exchange module, so that the working medium circulates at least once in the first heat exchange module, and the working medium circulates at least once in the second heat exchange module.

[0187] Specifically, when the heat exchange plate 2 exchanges heat with the battery, the regional distribution of the first type of area 26 and the second type of area 27 on the heat exchange plate 2 can correspond to the heat generating area on the battery to ensure the heat exchange effect of the heat exchange plate 2 on the battery. The actual structure of the battery can be composed of a group of battery cells, or can be composed of multiple groups of arranged battery cells. For example, when the heat exchange plate 2 exchanges heat with a battery composed of two groups of battery cells, the heat exchange plate 2 can be divided into a first heat exchange module and a second heat exchange module, the first heat exchange module corresponds to a group of battery cells, and the second heat exchange module corresponds to another group of battery cells. And at least part of the flow channels 21 are bent within each of the first heat exchange module and the second heat exchange module, which can increase the set area of the flow channels 21 in the first heat exchange module and the second heat exchange module, thereby increasing the effective heat exchange area of the heat exchange plate 2 and enhancing the heat exchange amount of the heat exchange plate 2 to the battery.

[0188] In one embodiment, refer to Figure 5 and Figure 6 , each heat exchange module includes a first type of area 26 and a second type of area 27,

[0189] The first type of area 26 includes a third sub-area 2621, a first sub-area 2611, a fourth sub-area 2622, and a second sub-area 2612;

[0190] The second type of area 27 includes a first sub-domain 271 and a second sub-domain 272;

[0191] The first sub-domain 271 is located between the third sub-area 2621 and the first sub-area 2611, so that the first sub-domain 271, the third sub-area 2621, and the first sub-area 2611 form a first heat exchange module; at the same time, the second sub-domain 272 is located between the fourth sub-area 2622 and the second sub-area 2612, so that the second sub-domain 272, the fourth sub-area 2622, and the second sub-area 2612 form a second heat exchange module. And the first sub-area 2611 is adjacent to the fourth sub-area 2622, thus realizing the adjacent arrangement of the first heat exchange module and the second heat exchange module, and ensuring the effective heat exchange of the heat exchange plate 2 to the battery composed of multiple groups of battery cells.

[0192] In one embodiment, as Figure 5 shown, the flow channel 21 includes a first confluence end and a second confluence end. The first confluence end is the connection point where the flow channel 21 converges to the first interface 221, and the second confluence end is the connection point where the flow channel 21 converges to the second interface 222.

[0193] When the heat exchange plate 2 is used to cool the battery, the working medium can flow into the heat exchange plate 2 from the first confluence end. The working medium in the flow channel 21 preferentially flows into the first type of area 26 corresponding to the battery area with a relatively higher temperature to cool the high-temperature area of the battery. Then it flows into the second type of area 27. Finally, the working medium can flow out from the second confluence end after confluence.

[0194] When the heat exchange plate 2 is used to heat the battery, the working medium can flow into the heat exchange plate from the second confluence end. The working medium in the flow channel preferentially flows into the second type of area 27 corresponding to the battery area with a relatively lower temperature to heat the low-temperature area of the battery. Then it flows into the first type of area 26. Finally, the working medium can flow out from the first confluence end after confluence. Preferentially heating the position corresponding to the second type of area 27 can better protect the battery and provide a sufficient working temperature for the battery. Especially when the battery has a self-heating function, this heat exchange plate can cooperate with the self-heating function to better provide temperature guarantee for the central area of the battery cell that is not easy to heat, preventing the temperature from being too low.

[0195] In practical applications, as Figure 5 shown, the first confluence end and the second confluence end are concentrated on the left side of the heat exchange plate 2. When arranging the flow channel 21, due to the limitation of the panel space, there is a situation where the flow channel cannot be arranged in the above ideal manner. In Figure 5 the shown embodiment, for the three areas of the fourth sub-area 2622, the second sub-domain 272, and the second sub-area 2612 located on the right side, the second sub-domain 272 can be preferentially heated or the fourth sub-area 2622 and the second sub-area 2612 can be preferentially cooled according to the preferred flow channel arrangement method. For the three areas of the first sub-domain 271, the third sub-area 2621, and the first sub-area 2611 located on the left side near the confluence end, since the flow channel 21 is relatively crowded, the above preferred arrangement may not be achieved. In this regard, an implementation method can also be adopted in which the flow channel 21 is introduced from the first confluence end and first arranged in the first sub-area 2611, then extended to the two areas of the first sub-domain 271 and the third sub-area 2621, and finally returned to the second confluence end.

[0196] Optionally, referring to Figure 5 , in the first heat exchange module, when the heat exchange plate 2 is used to exchange heat with the battery, the working medium circulates at least once in the flow channels in the third sub-area 2621, the first sub-domain 271, and the first sub-area 2611.

[0197] To improve the heat exchange efficiency between the working fluid and the battery when the working fluid flows in the third sub-region 2621, the first sub-domain 271, and the first sub-region 2611, the flow channels 21 in the third sub-region 2621, the first sub-domain 271, and the first sub-region 2611 can be set as circulating flow channels. For example, during the extension of the flow channel 21 in the third sub-region 2621, the first sub-domain 271, and the first sub-region 2611, it can reverse in the third sub-region 2621 and then extend to the first sub-domain 271, and then reverse again after extending from the first sub-domain 271 to the third sub-region 2621. The flow channel 21 forms a loop or multiple loops of circulating flow channels after multiple reversals in the third sub-region 2621, the first sub-domain 271, and the first sub-region 2611, so as to realize one or multiple cycles of the working fluid flowing in the third sub-region 2621, the first sub-domain 271, and the first sub-region 2611, and improve the heat exchange efficiency of the heat exchange plate 2.

[0198] Optionally, within the second heat exchange module, the first interface 221 can be connected to the fourth sub-region 2622, and the second interface 222 is connected to the second sub-domain 272;

[0199] When the heat exchange plate 2 is used to cool the battery, the working fluid flows into the first heat exchange module from the first interface 221, flows through the first heat exchange module into the fourth sub-region 2622, the second sub-domain 272, and the second sub-region 2612, and flows into the second sub-domain 272 from the fourth sub-region 2622 and the second sub-region 2612, and then flows into the second interface 222;

[0200] When the heat exchange plate 2 is used to heat the battery, the working fluid flows into the second sub-domain 272 from the second interface 222, and flows into the fourth sub-region 2622 and the second sub-region 2612 from the second sub-domain 272, and then flows into the first interface 221.

[0201] Optionally, the flow channel 21 includes a flow splitting junction 212. The first interface 221 is disposed on one side of the third sub-region 2621, and the number of the flow splitting junctions 212 in the third sub-region 2621 is greater than the number of the flow splitting junctions 212 in the first sub-domain 271.

[0202] Specifically, the first interface 221 is disposed on one side of the third sub-region 2621. When the heat exchange plate 2 is used to cool the battery, the working fluid can flow through the third sub-region 2621 and the first sub-domain 271 in sequence after passing through the first interface 221 in a low-temperature state. For example, the state of the working fluid passing through the first interface 221 is liquid. When the number of the flow splitting junctions 212 in the third sub-region 2621 is greater than the number of the flow splitting junctions 212 in the first sub-domain 271, more flow splitting junctions 212 can be provided in the third sub-region 2621. That is, the flow path can be increased through the flow splitting junctions 212 during the flow of the working fluid in the third sub-region 2621, and the working fluid in the liquid state can ensure the balanced distribution during flow splitting, improving the temperature uniformity of the heat exchange plate 2 during heat exchange.

[0203] It should be noted that when the heat exchange plate 2 is used to cool the battery, the flow splitting junctions 212 are used for flow splitting. When the heat exchange plate 2 is used to heat the battery, due to the reverse flow of the working fluid in the flow path, the flow splitting junctions 212 can be used for flow confluence.

[0204] Optionally, the number of the flow splitting junctions 212 in the first type of region 26 is greater than the number of the flow splitting junctions 212 in the second type of region 27.

[0205] Specifically, when the heat exchange plate 2 is used to cool the battery, the working fluid flows through the first type of region 26 and the second type of region 27 from the first interface 221 in a low-temperature state and flows into the second interface 222 from the second type of region 27. For example, the state of the working fluid when flowing through the first type of region 26 from the first interface 221 is liquid; when the number of the flow splitting junctions 212 in the first type of region 26 is greater than the number of the flow splitting junctions 212 in the second type of region 27, more flow splitting junctions 212 can be provided in the first type of region 26. That is, the flow path can be increased through the flow splitting junctions 212 during the flow of the working fluid in the first type of region 26, and the working fluid in the liquid state can ensure the balanced distribution during flow splitting.

[0206] In one embodiment, when the heat exchange plate 2 is used to exchange heat with the battery, the flow path 21 performs the first flow splitting in the third sub-region 2621. That is, the flow of the working fluid in the third sub-region 2621 can achieve flow confluence or flow splitting through the flow splitting junctions 212. Moreover, when the flow splitting junctions 212 in the third sub-region 2621 are used for flow splitting, the working fluid in the liquid state can be split through the flow splitting junctions 212 to ensure the balanced distribution of the working fluid during flow splitting.

[0207] Optionally, when the heat exchange plate 2 is used to cool the battery, after the flow channel is divided once in the third sub-region 2621, it is divided a second time and converges for the first time in the first sub-region 2611;

[0208] When the heat exchange plate 2 is used to heat the battery, after the flow channel is divided in the first sub-region 2611, it converges for the first time in the area of the first sub-region 2611. Then it converges for the second time in the third sub-region 2621.

[0209] Optionally, when the heat exchange plate 2 is used to cool the battery, the flow channel is divided in the fourth sub-region 2622 and the second sub-region 2612, and then converges in the second sub-domain 272;

[0210] When the heat exchange plate 2 is used to heat the battery, the flow channel is divided in the second sub-domain 272, and then converges in the fourth sub-region 2622 and the second sub-region 2612.

[0211] As Figure 5 and 6 shown, in the left region of the heat exchange plate 2 near the first interface 221 and the second interface 222, that is, in the first sub-domain 271, the third sub-region 2621 and the first sub-region 2611 form the first heat exchange module. Since the space of the first heat exchange module is close to the first interface 221 and the second interface 222, the flow channel 21 of the first heat exchange module will be relatively crowded. In this solution, it is preferable to arrange the flow dividing junction in the two regions of the third sub-region 2621 and the first sub-region 2611. These two regions correspond to the high heat generation regions of the battery. Dividing and converging here helps to reduce the situation of rapid and concentrated heat exchange of the working medium in the narrow space, enabling the working medium to exchange heat with these regions more evenly.

[0212] For example, the working medium flowing in from the first converging end can be concentrated at the corner position of the third sub-region 2621 for the first flow division, and then divided a second time at the upper part of the first sub-region 2611. After that, some of the flow channels can be divided again at the lower part of the first sub-domain 271, and the other part of the flow channels do not need to be divided. Finally, when the flow channel extends to the lower part of the third sub-region 2621, it can be concentrated for convergence, and then loop back to the second converging end. Usually, one or two convergences can be carried out. The above introductions are all examples when cooling, and the flow division and convergence forms are completely opposite when heating.

[0213] Furthermore, as Figure 5 and 6As shown, in the right area far from the first interface 221 and the second interface 222, that is, the second sub-area 272, the fourth sub-area 2622 and the second sub-area 2612 form the second heat exchange module, the space for the flow channel arrangement is relatively loose. This solution preferably evenly distributes the shunt junctions at the upper and lower ends of the three areas, and the number of shunt flows can also be correspondingly more. Taking the cooling solution as an example, the flow channels extending from the first confluence end on the left to the right can be shunted separately and extend into the fourth sub-area 2622 and the second sub-area 2612 respectively. In these two areas, the flow channel can extend straight and extend longitudinally through most of the area of ​​the two areas. Afterwards, the flow channel can turn to the second sub-area 272 located between the fourth sub-area 2622 and the second sub-area 2612. The flow channel usually passes through the second sub-area 272 in a straight extension manner, and finally converges each parallel flow channel on the lower side of the second sub-area 272. Finally, the flow channel extends back to the second confluence end to the left.

[0214] In this solution, the flow channel can be divided two or three times to achieve a layout feature of large-area parallel and long-distance extension. After that, it is converged two or three times and converged to the main road and returned to the confluence end. Similarly, in the heating mode, the working fluid flows from the second confluence end and directly flows to the lower side of the second sub-domain 272, and is divided multiple times to form multiple parallel flow paths.

[0215] Alternatively, see Figure 3 , at least part of the flow channel 21 has at least one diversion in the process of extending from the first partition 261 into the first sub-domain 271 , and the flow channel 21 has at least one confluence in the process of extending from the first partition 261 into the first sub-domain 271 .

[0216] In particular, the working fluid mentioned in this solution is preferably a refrigerant that can switch between gas and liquid phases. This refrigerant can effectively achieve heat exchange through phase transition, and the heat exchange efficiency is more efficient than traditional water cooling, coolant and other methods. Taking the cooling solution as an example, when at least part of the flow channel 21 has at least one diversion in the process of extending from the first partition 261 into the first sub-domain 271, the number of arrangements of the flow channel in the heat exchange plate can be increased, thereby improving the heat exchange efficiency of the heat exchange plate; and when there is at least one confluence in the process of extending from the first partition 261 into the first sub-domain 271, the ports of the flow channels in the heat exchange plate can be concentrated, thereby improving the structural compactness of the heat exchange plate.

[0217] On the contrary, due to the phase change of the refrigerant, if it is concentrated in a certain area and undergoes phase change in large quantities, it will cause other areas to not get a good heat exchange effect. Figure 15The flow splitting methods for regions a, b, c, and d are used to improve the uniformity of the working fluid flow in the flow channels. Further, in this solution, parallel multi-channel flow channels with uniformly varying lengths are preferably used to perform heat exchange on the first type of region and the second type of region, further reducing the occurrence of concentrated phase change of the working fluid due to uneven flow.

[0218] Optionally, referring to Figure 12 , the flow channel 21 includes a main circuit circulation flow channel 100, the main circuit circulation flow channel 100 is distributed at the edge of the heat exchange plate, one end of the main circuit circulation flow channel 100 is communicated with the first interface 221, the other end of the main circuit circulation flow channel 100 is communicated with the second interface 222, and the main circuit circulation flow channel 100 is split at most 3 times in the first type of region 26.

[0219] Specifically, in the flow channel 21 led out from the first interface 221, after the outermost main circuit circulation flow channel 100 is split once or twice, it basically stops splitting and instead continuously surrounds the outer edge of the heat exchange plate for one circle, and finally converges again at a position close to the second interface 222. This part of the flow channel is used to balance the temperature of the working fluid at the end of the circulation. Especially in the case of using a phase change refrigerant working fluid, this part of the flow channel can play a more important role. The volume of the working fluid after phase change changes greatly, and problems such as accumulation, poor circulation, and temperature concentration are likely to occur. This problem is more prominent at the convergence end. Since the working fluid in the outermost flow channel has fewer splitting times, the phase change of the working fluid in the outermost flow channel is relatively less, which can just be used to balance the temperature and phase state of the working fluid in other flow channels at the end of the whole cycle. It provides guarantee for the smoothness and uniformity of the overall cycle.

[0220] Optionally, referring to Figure 6 , the heat exchange plate includes a first region, the first region is used to form a battery projection region corresponding to the battery on the heat exchange plate, and the main circuit circulation flow channel 100 is located outside the battery projection region.

[0221] Specifically, the first region can be the Figure 6 battery coverage area shown in. When the main circuit circulation flow channel 100 is located outside the battery projection region, it can not only perform heat exchange on the area around the battery, but also ensure the integrity of the heat exchange of the heat exchange plate to the battery, and improve the heat exchange efficiency of the heat exchange plate.

[0222] The main circuit circulation flow channel 100 can be used as the first circulation flow channel in the heat exchange plate. In the middle of the heat exchange plate, a second circulation flow channel 200, a third circulation flow channel 300, and a fourth circulation flow channel 400 can also be formed, as shown in Figure 7 and Figure 8 .

[0223] Referring to Figure 9, a commutation knot 211 is formed at the commutation location of the flow channel 21. The commutation knot includes a first - type commutation knot 2111 and a second - type commutation knot 2112. The flow - channel direction at one end of the second - type commutation knot 2112 forms a commutation angle with the flow - channel direction at the other end of the first - type commutation knot 2111. When the flow channel 21 passes through the second - type commutation knot 2112, it can be bent at the commutation angle, such as being bent by 90° or 180°, so as to realize the flexible commutation of the flow channel 21 and ensure the distribution density of the flow channel 21 in the heat - exchange plate.

[0224] See Figure 10 , the shunt knot 212 includes a primary - level shunt knot 2121 and a secondary - level shunt knot 2122. The branch includes a primary - level branch. The primary - level shunt knot 2121 is connected between the main path and the primary - level branch. The branch includes a secondary - level branch. The secondary - level shunt knot 2122 is connected between the primary - level branch and the secondary - level branch.

[0225] Optionally, the heat - exchange plate includes:

[0226] A flow channel 21, which is arranged in the heat - exchange plate and is configured to allow a heat - exchange working medium to flow therein;

[0227] A first interface 221 and a second interface 222. One end of the flow channel is communicated with the first interface 221, and the other end of the flow channel is communicated with the second interface 222. The first interface 221 and the second interface 222 are configured to allow the heat - exchange working medium to enter the heat - exchange plate;

[0228] The heat - exchange plate includes a first - type area 26, which is used to be correspondingly arranged with the battery - pole - post area. The flow channel includes a shunt knot 212. The shunt knot includes a primary - level shunt knot 2121. At least one of the primary - level shunt knots is arranged in the first - type area. The primary - level shunt knot is arranged close to the first interface or the second interface, and the shunt knot shunts the flow channel.

[0229] Specifically, the first - type area 26 can correspond to the area where the battery cells generate relatively high heat. Since poles need to be provided on the battery cells for electrical connection, the heat generation in the pole - post area of the battery cells during operation is relatively large, thus forming the above - mentioned battery - pole - post area. The first - type area 26 can be used to be correspondingly arranged with the pole - post area on the battery, and the area on the heat - exchange plate other than the first - type area can be used to be correspondingly arranged with the non - pole - post area of the battery - cell body, so as to improve the heat - exchange efficiency of the heat - exchange plate 2.

[0230] Specifically, the number of flow channels at both ends of the flow splitting junction 212 is different; the flow channels at both ends of the flow splitting junction 212 can be used as the inlet and outlet of the working medium respectively, and in the face of different heat exchange conditions of the heat exchange plate, the inlet and outlet of the flow channels at both ends of the flow splitting junction 212 can be switched with each other, so that the working medium can flow forward or backward in the flow splitting junction 212.

[0231] In one embodiment, from the first interface 221 to the second interface 222, the flow channel has at least two flow splitting junctions 212, one of the flow splitting junctions 212 is close to the first interface and splits the flow channel, and the other flow splitting junction 212 is close to the second interface and converges the flow channel.

[0232] Specifically, the two ends of the flow channel 21 are respectively plugged or threadedly connected to the first interface 221 and the second interface 222. The distribution of the flow channel 21 in the heat exchange plate extends from the first interface 221 to the second interface 222 after at least one split and at least one convergence. The split can be in the way of one split into two, one split into three or one split into more flow channels, and the convergence can be in the way of two in one, three in one or more flow channels in one, so as to form one or more flow splitting junctions 212 on the flow channel 21.

[0233] The flow channel of the present application includes a flow splitting junction 212, and the flow splitting junction includes a primary flow splitting junction 2121. At least one of the primary flow splitting junctions is arranged in the first type of area, and the primary flow splitting junction is arranged close to the first interface or the second interface, and the flow splitting junction splits the flow channel. Since the first type of area corresponds to the area of the pole column with higher heat generation in the battery cell, the primary flow splitting junction can improve the distribution density of the flow channels in the first type of area by changing the number of flow channels, thereby improving the heat exchange effect of the heat exchange plate.

[0234] Optionally, referring to Figure 16 and Figure 17 , the heat exchange plate includes a first heat exchange module 201 and a second heat exchange module 202, and both the first heat exchange module 201 and the second heat exchange module 202 include the first type of area 26;

[0235] The first type of area 26 of the first heat exchange module includes a third sub-area 2621 and a first sub-area 2611, and the first type of area 26 of the second heat exchange module includes a fourth sub-area 2622 and a second sub-area 2612;

[0236] The primary flow splitting junction is arranged in the third sub-area 2621, and the flow splitting junction further includes a secondary flow splitting junction 2122, and the secondary flow splitting junction is located in at least one of the first sub-area 2611, the second sub-area and the fourth sub-area.

[0237] Specifically, when the heat exchange plate 2 exchanges heat with the battery, the first type of region 26 on the heat exchange plate 2 can correspond to the pole region on the battery to ensure the heat exchange effect of the heat exchange plate 2 on the battery. The actual structure of the battery can be composed of a group of battery cells, or can be composed of multiple groups of arranged battery cells. For example, refer to Figure 6 , when the heat exchange plate 2 exchanges heat with a battery composed of two groups of battery cells, the heat exchange plate 2 can be divided into a first heat exchange module and a second heat exchange module. The first heat exchange module corresponds to one group of battery cells, and the second heat exchange module corresponds to the other group of battery cells. And at least part of the flow channels 21 are bent within each of the first heat exchange module and the second heat exchange module, which can increase the set area of the flow channels 21 in the first heat exchange module and the second heat exchange module, and further increase the effective heat exchange area of the heat exchange plate 2, and improve the heat exchange amount of the heat exchange plate 2 to the battery.

[0238] Specifically, the first heat exchange module can be Figure 5 the left region in Figure 5 , the second heat exchange module can be the right region in

[0239] The first type of region 26 in the first heat exchange module includes a third sub-region 2621 and a first sub-region 2611, and the first type of region 26 in the second heat exchange module includes a fourth sub-region 2622 and a second sub-region 2612. The first interface 221 and the second interface 222 can be arranged close to the third sub-region 2621. And the primary flow splitting junction is the flow splitting junction in the flow channel close to the first interface 221 and the second interface 222, so that the primary flow splitting junction is arranged in the third sub-region 2621.

[0239] Optionally, the heat exchange plate includes:

[0240] a heat exchange region and a battery region. The heat exchange region is arranged around the battery region, and the battery region is the battery projection region formed by the battery on the heat exchange plate.

[0241] flow channels 21, the flow channels 21 are arranged in the heat exchange plate, and the flow channels are configured to allow a heat exchange working medium to flow therein. The flow channels include a first type of flow channels and a second type of flow channels;

[0242] The first type of flow channels are located in the heat exchange region, and the second type of flow channels are distributed in the battery region.

[0243] Specifically, when the flow channel 21 extends in the heat exchange plate, after the outermost first type of flow channel is shunted once or twice, it basically stops being shunted and instead continuously surrounds the outer edge of the heat exchange plate in a circle, and finally converges near the position of the flow channel outlet. This part of the flow channel is used to balance the temperature of the working medium at the end of the circulation. Especially in the case of using a phase change refrigerant working medium, this part of the flow channel can play a more significant role. After the phase change, the volume of the working medium changes greatly, and problems such as accumulation, poor circulation, and temperature concentration are likely to occur. This problem is more prominent at the convergence end. Since the working medium in the outermost flow channel has fewer shunts, the phase change of the working medium in the outermost flow channel is relatively less, which can exactly be used to balance the temperature and phase state of the working medium in other flow channels at the end of the entire cycle. It provides guarantee for the smoothness and uniformity of the overall cycle.

[0244] When the first type of flow channel surrounds the battery area and is located outside the battery projection area, it can not only exchange heat with the area around the battery, but also ensure the integrity of the heat exchange of the heat exchange plate with the battery, and improve the heat exchange efficiency of the heat exchange plate.

[0245] The first type of flow channel can be used as the first circulation flow channel in the heat exchange plate. In the middle of the heat exchange plate, a second type of flow channel including a second circulation flow channel, a third circulation flow channel, and a fourth circulation flow channel can also be formed to improve the heat exchange balance of the heat exchange plate.

[0246] Optionally, the length of the first type of flow channel is less than the length of the second type of flow channel; and / or,

[0247] The number of shunts of the first type of flow channel is less than the number of shunts of the second type of flow channel.

[0248] Specifically, although the first type of flow channel is located in the heat exchange area, that is, the first type of flow channel surrounds the outer edge of the heat exchange plate in a circle, making the second type of flow channel located inside the first type of flow channel; but because the first type of flow channel basically stops being shunted after being shunted once or twice, and the number of direction changes of the first type of flow channel is small, while the second type of flow channel needs to be shunted and change direction multiple times in the heat exchange plate to evenly distribute the flow channels in the heat exchange plate, so the length of the first type of flow channel is less than the length of the second type of flow channel, and the number of shunts of the first type of flow channel is less than the number of shunts of the second type of flow channel, ensuring the balance of the flow channel distribution in the heat exchange plate. The embodiment of the present application also provides a battery pack, including the heat exchange plate 2 and multiple battery cores 1. Each end of each battery core is provided with a pole column, and the multiple battery cores are distributed along a first direction, and the first direction can be Figure 1 the X direction in Figure 1In the Z direction, the large surfaces of the battery cells are formed by the sides of the plurality of battery cells along the second direction. The heat exchange plate is disposed close to one or two large surfaces of the battery cells, which can ensure the heat exchange effect of the heat exchange plate on the battery cells.

[0249] In addition, the plurality of battery cells 1 can form a first battery module 11 and a second battery module 12. The second battery module 12 is located on one side of the first battery module 11 away from the inlet and outlet assembly 22. Specifically, the flow channels in the first type of area 26 can be opposite to the first battery module 11 and can be close to the inlet and outlet assembly 22, that is, the flow channels in the first type of area 26 are located at the proximal end of the heat exchange plate; while the flow channels 21 in the second type of area 27 can be away from the inlet and outlet assembly 22, that is, the flow channels in the second type of area 27 are located at the distal end of the heat exchange plate; in order to ensure the balance of the heat exchange effect at the proximal and distal ends of the heat exchange plate, the flow rate of the distal flow channel 21 can be increased. For example, the flow rate of the channel in the flow channel 21 opposite to the second battery module 12 is set as the second flow rate, and the first flow rate is less than the second flow rate.

[0250] Optionally, the direction of the connection line of the two end pole columns of the battery cell is the third direction, and the third direction can be Figure 1 the Y direction in, the first direction, the second direction and the third direction can be parallel to the width direction, the height direction and the length direction of the battery cell respectively. When the first direction, the second direction and the third direction are perpendicular to each other, the plurality of battery cells can form a battery pack structure with a compact structure to ensure the energy density of the battery pack.

[0251] Optionally, the heat exchange plate is a bottom plate or an upper cover. Specifically, the heat exchange plate can be disposed on one or both sides of the battery cell along the second direction. When the heat exchange plate is disposed on one side of the battery cell along the second direction, for example, when the heat exchange plate is disposed on the bottom side of the plurality of battery cells, the heat exchange plate can form the bottom plate of the battery pack. On the one hand, it can ensure the heat exchange effect on the battery cell when the heat exchange plate is attached to the battery cell, and on the other hand, it can play a good protective role for the battery pack when the bottom of the battery pack is impacted; when the heat exchange plate is disposed on the top side of the plurality of battery cells, the heat exchange plate can form the upper cover of the battery pack, and can also ensure the heat exchange effect on the battery cell when the heat exchange plate is attached to the battery cell, and can also protect the battery pack.

[0252] The embodiment of the present application provides a vehicle, including the heat exchange plate described above; or,

[0253] including the battery pack described above.

[0254] Although some specific embodiments of the present application have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration purposes and not for limiting the scope of the present application. Those skilled in the art should understand that the above embodiments can be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A heat exchange plate, applied to a battery, characterized in that, The heat exchange plate includes: a first interface (221), a second interface (222), and a flow channel (21) connecting the first interface (221) and the second interface (222); The heat exchange plate (2) is used for heating the battery, and the flow channel is used for flowing a working medium. When the heat exchange plate (2) is used for cooling the battery, the working medium flows into the flow channel (21) from the first interface (221) and flows out from the second interface (222). When the heat exchange plate (2) is used for heating the battery, the working medium flows into the flow channel (21) from the second interface (222) and flows out from the first interface (221). When the heat exchange plate (2) is used for cooling the battery, the working medium flows in from the first interface (221) and preferentially flows through the first type of area. When the heat exchange plate (2) is used for heating the battery, the working medium flows in from the second interface (222) and preferentially flows through the second type of area, and the temperature of the area corresponding to the second type of area of the battery is lower than the temperature of the area corresponding to the first type of area of the battery. The flow channel includes a first section of the flow channel connected to the first interface (221) and a second section of the flow channel connected to the second interface (222). When the heat exchange plate (2) is used for cooling the battery, the working medium flows in from the first interface (221), successively flows through the first section of the flow channel and the second section of the flow channel, and then flows out from the second interface. And the length of the flow channel in the first section of the flow channel flowing through the first type of area is greater than the length of the flow channel flowing through the second type of area, and the length of the flow channel in the second section of the flow channel flowing through the first type of area is less than the length of the flow channel flowing through the second type of area.

2. The heat exchange plate according to claim 1, characterized in that, It includes: The first type of area (26) is used to be correspondingly arranged with the battery pole column area, and the second type of area (27) is used to be correspondingly arranged with the non-pole column area of the battery.

3. The heat exchange plate according to claim 2, characterized in that, When the heat exchange plate (2) is used for heating the battery, the working medium flows in from the second interface (222), successively flows through the second section of the flow channel and the first section of the flow channel, and then flows out from the first interface (221). And the length of the flow channel in the second section of the flow channel flowing through the first type of area is less than the length of the flow channel flowing through the second type of area, and the length of the flow channel in the first section of the flow channel flowing through the first type of area is greater than the length of the flow channel flowing through the second type of area.

4. The heat exchange plate according to claim 3, characterized in that, The ratio range of the length of the first section of the flow channel to the length of the second section of the flow channel is 0.5 - 5.

5. The heat exchange plate according to claim 4, characterized in that, The ratio range of the width of the second type of area to the width of the first type of area is 1 - 8.

6. The heat exchange plate according to claim 5, characterized in that, The ratio range of the width of the first type of area to the length of the battery is 0.1 - 0.4, and the ratio range of the width of the second type of area to the length of the battery is 0.1 - 0.

6.

7. The heat exchange plate according to claim 6, characterized in that, The first interface (221) and the second interface (222) are located on the same side of the heat exchange plate.

8. The heat exchange plate according to claim 7, characterized in that, The heat exchange plate includes an inlet and outlet assembly (22), and the first interface (221) and the second interface (222) are located on the inlet and outlet assembly (22).

9. The heat exchange plate according to claim 3, characterized in that, The heat exchange plate includes a first type of area (26) and a second type of area (27), and the flow channels are distributed in the first type of area (26) and the second type of area (27). The first type of area (26) includes a first sub-area (261) and a second sub-area (262). The second type of area (27) includes a first sub-domain (271), and the first sub-domain (271) is located between the first sub-area (261) and the second sub-area (262). When the heat exchange plate (2) is used to heat the battery, the working fluid circulates at least once in the first sub-area (261), the first sub-domain (271), and the second sub-area (262). The first type of area (26) is arranged corresponding to the battery pole region, and the second type of area (27) is arranged corresponding to the non-pole region of the battery.

10. The heat exchange plate according to claim 3, characterized in that, The first type of area (26) includes a fourth sub-area (2622). The second type of area (27) includes a second sub-domain (272). When the heat exchange plate (2) is used to cool the battery, the working fluid flows from the first interface (221) through the fourth sub-area (2622), the second sub-domain (272), and the fourth sub-area (2622), and flows into the second interface (222) from the fourth sub-area (2622). When the heat exchange plate (2) is used to heat the battery, the working fluid flows from the second interface (222) through the fourth sub-area (2622), the second sub-domain (272), and the fourth sub-area (2622), and flows into the first interface (221) from the fourth sub-area (2622).

11. The heat exchange plate according to claim 3, characterized in that, The first type of area (26) includes a fourth sub-area (2622) and a second sub-area (2612). The second type of area (27) includes a second sub-domain (272), and the second sub-domain (272) is located between the fourth sub-area (2622) and the second sub-area (2612). When the heat exchange plate (2) is used to cool the battery, the working fluid flows into the fourth sub-area (2622), the second sub-domain (272), and the second sub-area (2612) from the first interface (221), and flows back from the second sub-area (2612) to the second sub-domain (272) and the fourth sub-area (2622) and then flows into the second interface (222). When the heat exchange plate (2) is used to heat the battery, the working fluid flows into the fourth sub-area (2622), the second sub-domain (272), and the second sub-area (2612) from the second interface (222), and flows back from the second sub-area (2612) to the second sub-domain (272) and the fourth sub-area (2622) and then flows into the first interface (221).

12. The heat exchange plate according to claim 3, wherein, The heat exchange plate includes a first heat exchange module and a second heat exchange module. Both the first heat exchange module and the second heat exchange module include a first type of area (26) and a second type of area (27). The first type of area (26) includes a third sub-area (2621), a first sub-area (2611), a fourth sub-area (2622), and a second sub-area (2612). The second type of region (27) includes a first sub-region (271) and a second sub-region (272); The first sub-region (271) is located between the third sub-region (2621) and the first sub-region (2611), the second sub-region (272) is located between the fourth sub-region (2622) and the second sub-region (2612), and the first sub-region (2611) is adjacent to the fourth sub-region (2622).

13. The heat exchange plate according to claim 12, wherein, In the first heat exchange module, when the heat exchange plate (2) is used to heat the battery, the working fluid circulates at least once in the flow channels in the third sub-region (2621), the first sub-region (271), and the first sub-region (2611).

14. The heat exchange plate according to claim 12, wherein, In the second heat exchange module, When the heat exchange plate (2) is used to cool the battery, the working fluid flows into the first heat exchange module from the first interface (221), flows through the first heat exchange module into the fourth sub-region (2622) and the second sub-region (2612), and flows from the fourth sub-region (2622) and the second sub-region (2612) into the second sub-region (272), and then flows into the second interface (222); When the heat exchange plate (2) is used to heat the battery, the working fluid flows into the second sub-region (272) from the second interface (222), and flows from the second sub-region (272) into the fourth sub-region (2622) and the second sub-region (2612), and then flows into the first interface (221).

15. The heat exchange plate according to claim 3, wherein, Comprising: The flow channel includes a flow splitting junction (212), the flow splitting junction includes a primary flow splitting junction (2121), at least one of the primary flow splitting junctions is arranged in the first type of region, the primary flow splitting junction is arranged close to the first interface or the second interface, and the flow splitting junction splits the flow channel.

16. The heat exchange plate according to claim 15, wherein, The heat exchange plate includes a first heat exchange module and a second heat exchange module, and both the first heat exchange module and the second heat exchange module include the first type of region (26); The first type of region (26) of the first heat exchange module includes a third sub-region (2621) and a first sub-region (2611), and the first type of region (26) of the second heat exchange module includes a fourth sub-region (2622) and a second sub-region (2612); The primary flow splitting junction is arranged in the third sub-region (2621), and the flow splitting junction further includes a secondary flow splitting junction (2122), and the secondary flow splitting junction is located in at least one of the first sub-region (2611), the second sub-region, and the fourth sub-region.

17. The heat exchange plate according to claim 3, wherein, Comprising: A heat exchange region and a battery region, the heat exchange region surrounds the battery region, and the battery region is the battery projection region formed by the battery on the heat exchange plate, The flow channel includes a first type of flow channel and a second type of flow channel; The first type of flow channel is located in the heat exchange region, and the second type of flow channel is distributed in the battery region.

18. The heat exchange plate according to claim 17, wherein, The length of the first type of flow channel is less than the length of the second type of flow channel, and / or, the number of flow splitting times of the first type of flow channel is less than the number of flow splitting times of the second type of flow channel.

19. A heat exchange method of a heat exchange plate, applied to a battery, wherein, The heat exchange plate includes: a first interface, a second interface, and a flow channel connecting the first interface and the second interface; The heat exchange plate is used for heat exchanging the battery, and the flow channel is used for circulating the working medium. The heat exchange method includes: When the heat exchange plate is used for cooling the battery, the working medium flows into the flow channel from the first interface and flows out from the second interface. When the heat exchange plate is used for heating the battery, the working medium flows into the flow channel from the second interface and flows out from the first interface. When the heat exchange plate is used for cooling the battery, the working medium flows into from the first interface and preferentially flows through the first type of area. When the heat exchange plate is used for heating the battery, the working medium flows into from the second interface and preferentially flows through the second type of area. The temperature of the area of the second type of area corresponding to the battery is lower than the temperature of the area of the first type of area corresponding to the battery.

20. A battery pack, wherein, It includes the heat exchange plate (2) according to any one of claims 1-18.

21. The battery pack according to claim 20, wherein, It includes a plurality of battery cores (1). Pole columns are arranged at both ends of each battery core. The battery cores are distributed in the first direction, and the heat exchange plate is arranged on one side or both sides of the battery cores in the second direction.

22. The battery pack according to claim 21, wherein,The direction of the connection line of the pole columns at both ends of the battery core is the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

23. The battery pack according to claim 21, wherein, The heat exchange plate is a bottom plate or an upper cover.

24. A vehicle, wherein, It includes the heat exchange plate according to any one of claims 1-18; or, It includes the battery pack according to any one of claims 20-23.

Images