Heat exchange plate, battery pack, and vehicle

Abstract

Heat exchange plate, battery pack, and vehicle. The heat exchange plate includes a first interface, a second interface, and a flow path communicating with the first interface and the second interface. The heat exchange plate is configured to exchange heat for a battery, and the flow path is configured to circulate a working medium. When the heat exchange plate is used to cool the battery, the working medium flows into the flow path from the first interface and flows out from the second interface. When the heat exchange plate is used to heat the battery, the working medium flows into the flow path from the second interface and flows out from the first interface.

Description

Technical Field

[0001] Cross - reference to Related Applications This disclosure claims priority and benefits to Chinese Patent Application No. 202210911342.3 filed on July 29, 2022 and Chinese Patent Application No. 202211352187.2 filed on October 31, 2022. The entire contents of the above - mentioned applications are incorporated herein by reference.

[0002] This disclosure relates to the field of battery components, and more particularly to heat - exchange plates, battery packs, and vehicles.

Background Art

[0003] As people's awareness of environmental protection increases, more electric vehicles are emerging. As a core power component in electric vehicles, the battery is indispensable for the long - term and stable operation of electric vehicles.

[0004] In the existing technology, water passes through a harmonica tube to cool or heat the battery. However, the water flow can only enter the harmonica tube from a fixed inlet and is discharged from a fixed outlet, that is, the harmonica tube uses the same water flow direction during the heating operation or the cooling operation. As a result, heat - exchange components such as the harmonica tube are likely to make the temperatures of some parts of the battery too high or too low, reducing the stability and service life of the battery.

Summary of the Invention

Problems to be Solved by the Invention

[0005] One object of this disclosure is to provide a novel technical solution for a heat - exchange plate, a battery pack, and a vehicle that can solve the problem of low heat - exchange efficiency of conventional heat - exchange plates.

Means for Solving the Problems

[0006] According to a first aspect of the present disclosure, there is provided a heat exchange plate applied to a battery, including a first end portion, a second end portion, and a flow path connecting the first end portion to the second end portion. The heat exchange plate is configured to exchange heat for the battery, and the flow path is configured to allow a working medium to flow therethrough. When the heat exchange plate is configured to cool the battery, the working medium flows into the flow path from the first end portion and flows out from the second end portion. When the heat exchange plate is configured to heat the battery, the working medium flows into the flow path from the second end portion and flows out from the first end portion.

[0007] Optionally, when the heat exchange plate is configured to cool the battery, the working medium flows in from the first end portion and preferentially flows through the first type region, and when the heat exchange plate is configured to heat the battery, the working medium flows in from the second end portion and preferentially flows through the second type region.

[0008] The first type region is arranged corresponding to the post region of the battery, and the second type region is arranged corresponding to the non-post region of the battery.

[0009] Optionally, the flow path includes a first flow path section connected to the first end portion and a second flow path section connected to the second end portion.

[0010] When the heat exchange plate is configured to cool the battery, the working medium flows in from the first end portion, continuously flows through the first flow path section and the second flow path section, and then flows out from the second end portion. In the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region. In the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region.

[0011] When the heat exchange plate is configured to heat the battery, the working medium flows in from the second terminal end, continuously passes through the second flow path section and the first flow path section, and then flows out from the first terminal end. In the second flow path section, the length of the flow path passing through the first type region is shorter than the length of the flow path passing through the second type region. In the first flow path section, the length of the flow path passing through the first type region is longer than the length of the flow path passing through the second type region.

[0012] Optionally, the ratio of the length of the first flow path section to the length of the second flow path section is in the range of 0.5 to 5.

[0013] Optionally, the ratio of the width of the second type region to the width of the first type region is in the range of 1 to 8.

[0014] Optionally, the ratio of the width of the first type region to the length of the battery is in the range of 0.1 to 0.4, and the ratio of the width of the second type region to the length of the battery is in the range of 0.1 to 0.6.

[0015] Optionally, the first terminal end and the second terminal end are located on the same side of the heat exchange plate.

[0016] Optionally, the heat exchange plate includes an inlet and an outlet assembly, and the first terminal end and the second terminal end are located at the inlet and the outlet assembly.

[0017] Optionally, the heat exchange plate includes a first type region and a second type region, and the flow paths are distributed in the first type region and the second type region. The first type region includes a first partition and a second partition, the second type region includes a first partition region, and the first partition region is located between the first partition and the second partition. When the heat exchange plate is configured to exchange heat for a battery, the working medium circulates at least once in the first partition, the first partition region, and the second partition. The first type region is arranged corresponding to the post region of the battery, and the second type region is arranged corresponding to the non-post region of the battery.

[0018] Optionally, the first type region includes a fourth sub-region, and the second type region includes a second partition region. When the heat exchange plate is configured to cool the battery, the working medium flows from the first end portion through the fourth sub-region, the second partition region, and the fourth sub-region, and flows into the second end portion from the fourth sub-region. When the heat exchange plate is configured to heat the battery, the working medium flows from the second end portion through the fourth sub-region, the second partition region, and the fourth sub-region, and flows into the first end portion from the fourth sub-region.

[0019] Optionally, the first type region includes a fourth sub-region and a second sub-region, the second type region includes a second partition region, and the second partition region is located between the fourth sub-region and the second sub-region.

[0020] When the heat exchange plate is configured to cool the battery, the working medium flows into the fourth sub-region, the second partition region, and the second sub-region from the first terminal end, returns from the second sub-region to the second partition region and the fourth sub-region, and then flows into the second terminal end. When the heat exchange plate is configured to heat the battery, the working medium flows into the fourth sub-region, the second partition region, and the second sub-region from the second terminal end, returns from the second sub-region to the second partition region and the fourth sub-region, and then flows into the first terminal end.

[0021] 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 region and a second type region. The first type region includes the third sub-region, the first sub-region, the fourth sub-region, and the second sub-region, and the second type region includes the first partition region and the second partition region. The first partition region is located between the third sub-region and the first sub-region, the second partition region is located between the fourth sub-region and the second sub-region, and the first sub-region and the fourth sub-region are arranged adjacent to each other.

[0022] Optionally, in the first heat exchange module, when the heat exchange plate is configured to exchange heat for the battery, the working medium circulates at least once in the flow paths of the third sub-region, the first partition region, and the first sub-region.

[0023] Optionally, when in the second heat exchange module the heat exchange plate is configured to cool the battery, the working medium flows into the first heat exchange module from the first terminal end, flows from the first heat exchange module into the fourth sub-region and the second sub-region, flows from the fourth sub-region and the second sub-region into the second partition region, and then flows into the second terminal end. When the heat exchange plate is configured to heat the battery, the working medium flows into the second partition region from the second terminal end, flows from the second partition region into the fourth sub-region and the second sub-region, and then flows into the first terminal end.

[0024] Optionally, the flow path includes a flow bifurcation point, the flow bifurcation point includes a first-stage flow bifurcation point, at least one first-stage flow bifurcation point is disposed within the first-type region, the first-stage flow bifurcation point is disposed close to the first terminal end or the second terminal end, and the flow bifurcation point bifurcates the flow path.

[0025] 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 region. The first-type region of the first heat exchange module includes the third sub-region and the first sub-region, and the first-type region of the second heat exchange module includes the fourth sub-region and the second sub-region. The first-stage flow bifurcation point is disposed within the third sub-region, the flow bifurcation point further includes a second-stage flow bifurcation point, and the second-stage flow bifurcation point is located in at least one of the first sub-region, the second sub-region, and the fourth sub-region.

[0026] Optionally, the heat exchange plate includes a heat exchange region and a battery region, the heat exchange region is disposed around the battery region, the battery region is the battery protruding region of the battery on the heat exchange plate, and the flow path includes a first-type flow path and a second-type flow path. The first-type flow path is located in the heat exchange region, and the second-type flow path is distributed in the battery region.

[0027] Optionally, the length of the first type of flow path is shorter than the length of the second type of flow path and / or the number of branchings of the first type of flow path is less than the number of branchings of the second type of flow path.

[0028] According to a second aspect of the present disclosure, there is provided a battery pack including the heat exchange plate according to the first aspect.

[0029] According to a third aspect of the present disclosure, there is provided a vehicle including the heat exchange plate according to the first aspect or

[0030] including the battery pack according to the second aspect.

[0031] The technical effects of the present disclosure are as follows.

[0032] Embodiments of the present disclosure provide a heat exchange plate. The heat exchange plate can improve the heat exchange efficiency of the heat exchange plate through heat exchange between the working medium and the battery. Further, when the heat exchange plate is configured to cool or heat the battery, the flow direction of the working medium in the flow path can be flexibly switched, so that the region first heated when the heat exchange plate heats the battery is different from the region first cooled when the heat exchange plate cools the battery, which improves the temperature uniformity of the heat exchange of the heat exchange plate.

[0033] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings.

[0034] The accompanying drawings are incorporated herein and constitute a part hereof, showing embodiments consistent with the present disclosure and used together with the present specification to explain the principles of the present disclosure.

Brief Description of the Drawings

[0035]

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Mode for Carrying Out the Invention

[0036] Various exemplary embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Note that, unless otherwise specified, the opposite arrangements, mathematical formulas, and numerical values of the components and processes described in the embodiments do not limit the scope of the present disclosure.

[0037] The following description of at least one exemplary embodiment is merely illustrative and in no way constitutes a limitation on the present disclosure and its application or use.

[0038] Technologies, methods, and devices known to those skilled in the relevant art may not be discussed in detail in this specification, but when appropriate, those technologies, methods, and devices are considered to be part of this specification.

[0039] In all the examples shown and discussed in this specification, any specific value is merely illustrative and should not be construed as a limitation. Therefore, other examples of the exemplary embodiments can have different values.

[0040] Note that it should be noted that similar reference numerals and reference characters refer to similar items in the following accompanying drawings. Therefore, if an item is defined in one accompanying drawing, that item does not need to be further discussed in subsequent accompanying drawings.

[0041] This technical solution provides a heat exchange plate that can be used on an electric vehicle, and the heat exchange plate can provide a good heat exchange effect for the battery. When the battery needs to be heated, the heat exchange agent with heat can be conducted through the flow path to various regions of the battery to assist in battery heating. When the battery needs to be cooled, the flow path can be used in the reverse direction, so that the heat exchange agent with low temperature is conducted in the reverse direction through the flow path to various regions of the battery to assist in battery cooling.

[0042] The heat exchange plate provided by this technical solution is designed to provide stable heat exchange performance for the battery of new energy electric vehicles and a better temperature environment for the battery.

[0043] Referring to FIGS. 1 to 15, embodiments of the present disclosure provide a heat exchange plate applied to a battery. The heat exchange plate includes a first end portion 221, a second end portion 222, and a flow path 21 connecting the first end portion 221 to the second end portion 222.

[0044] The heat exchange plate 2 is configured to exchange heat for the battery, and the flow path is configured to allow the working medium to flow. The working medium may be a coolant such as R123a, R32, CO2, or water.

[0045] When the heat exchange plate 2 is configured to cool the battery, for example, when the heat exchange plate 2 can cool the battery through a low-temperature working medium, the working medium flows into the flow path 21 from the first end portion 221 and flows out from the second end portion 222. Through the phase change of the working medium and the heat exchange with the battery, the battery can be effectively cooled.

[0046] When the heat exchange plate 2 is configured to heat the battery, for example, when the heat exchange plate 2 can heat the battery through a high-temperature working medium, the working medium flows into the flow path 21 from the second end portion 222 and flows out from the first end portion 221. Through the phase change of the working medium and the heat exchange with the battery, the battery can be effectively heated. This improves the heat exchange effect of the heat exchange plate 2 for the battery and ensures the long-term and stable operation of the battery.

[0047] The heat exchange plate provided in the embodiment of the present disclosure can improve the heat exchange efficiency of the heat exchange plate 2 through the phase change of the working medium and the heat exchange with the battery. Further, when the heat exchange plate 2 is configured to cool or heat the battery, the region first heated when the heat exchange plate heats the battery is different from the region first cooled when the heat exchange plate cools the battery, which improves the temperature uniformity of the heat exchange of the heat exchange plate.

[0048] In addition, the flow path 21 may be engraved on the heat exchange plate 2, and the battery may include a plurality of cells. The heat exchange plate 2 cools the battery in the forward direction (the flow direction of the working medium in the flow path) and heats the battery in the reverse direction (the flow direction of the working medium in the flow path), which 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.

[0049] The heat exchange plate 2 can be switched between two states, namely, a cooling mode and a heating mode. In these two states, the heat exchange plate or the pump device achieves the purpose of flowing the working medium in the opposite direction and thereby preferentially performing heat exchange on the region.

[0050] Optionally, When the heat exchange plate 2 is configured to cool the battery, the working medium flows in from the first end portion 221 and preferentially flows through the first type region. When the heat exchange plate 2 is configured to heat the battery, the working medium flows in from the second end portion 222 and preferentially flows through the second type region.

[0051] The first type region 26 is arranged corresponding to the post region of the battery, and the second type region 27 is arranged corresponding to the non - post region of the battery.

[0052] Specifically, when the heat exchange plate 2 is configured to exchange heat for the battery, the first type region 26 can correspond to the region where the battery core generates higher heat in the battery, and the second type region 27 can correspond to the region where the battery core generates lower heat in the battery. Since the battery core needs to provide posts for electrical connection, the heat generated in the post region (the region near the posts) of the battery core during operation is at a higher temperature, thus forming the post region of the battery. The region of the main body of the battery core generates lower heat and thus forms the non - post region of the battery. To improve the heat exchange efficiency of the heat exchange plate 2, the first type region 26 can be arranged corresponding to the post region of the battery, and the second type region 27 can be arranged corresponding to the non - post region of the main body of the battery core on the battery.

[0053] When the heat exchange plate 2 is configured to cool the battery, the overall temperature of the battery is relatively high, and the working medium may be a low-temperature coolant. The low-temperature working medium flows in from the first terminal portion 221 and then preferentially flows through the first type region. In this way, in order to improve the efficiency of heat exchange between the heat exchange plate and the post region of the battery, the low-temperature working medium can be used to preferentially cool the post region of the battery that generates higher heat on the battery. Next, in order to ensure the heat exchange balance of the heat exchange plate for the battery and to maintain the temperature uniformity of the operating battery, the working medium in the flow path flows through the second type region to cool the non-post region of the battery that generates lower heat on the battery.

[0054] Specifically, when the heat exchange plate 2 is configured to cool the battery, the fact that the working medium preferentially flows through the first type region may be that the length of the flow path of the working medium flowing through the first type region is longer than the length of the flow path of the working medium flowing through the second type region, or the flow rate of the working medium flowing through the first type region is larger than the flow rate of the working medium flowing through the second type region, thereby ensuring that the cooling provided by the first type region to the battery is greater than the cooling provided by the second type region to the battery, thereby making the temperature of the first type region close to the temperature of the second type region, thereby ensuring the temperature uniformity of the heat exchange plate.

[0055] When the heat exchange plate 2 is configured to heat the battery, the overall temperature of the battery is relatively low, and the working medium may be a high-temperature coolant. The high-temperature working medium flows in from the second terminal portion 222 and then preferentially flows through the second type region. In this way, in order to improve the efficiency of heat exchange between the heat exchange plate and the non-post region of the battery, the high-temperature working medium can be used to preferentially heat the non-post region of the battery that has lower heat on the battery. Next, in order to ensure the heat exchange balance of the heat exchange plate for the battery and to maintain the temperature uniformity of the operating battery, the working medium in the flow path flows through the first type region to heat the post region of the battery that has higher heat on the battery.

[0056] Specifically, when the heat exchange plate 2 is configured to heat the battery, the fact that the working medium preferentially flows through the second type region may be that the length of the flow path of the working medium flowing through the second type region is longer than the length of the flow path of the working medium flowing through the first type region, or the flow rate of the working medium flowing through the second type region is larger than the flow rate of the working medium flowing through the first type region, thereby ensuring that the heating provided by the second type region to the battery is greater than the heating provided by the first type region to the battery, thereby making the temperature of the first type region close to the temperature of the second type region, thereby ensuring the temperature uniformity of the heat exchange plate.

[0057] It should be noted that in the present disclosure, the order of flow of the working medium preferentially flowing through the first type region or the second type region is not limited. Instead, it corresponds to the amount of heat exchange between the working medium and the battery in the first type region or the second type region.

[0058] Optionally, the flow path includes a first flow path section connected to the first terminal portion 221 and a second flow path section connected to the second terminal portion.

[0059] When the heat exchange plate 2 is configured to cool the battery, the working medium flows in from the first end portion 221, continuously passes through the first flow path section and the second flow path section, and then flows out from the second end portion. In the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region. In the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region.

[0060] When the heat exchange plate 2 is configured to heat the battery, the working medium flows in from the second end portion 222, continuously passes through the second flow path section and the first flow path section, and then flows out from the first end portion 221. In the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region. In the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region.

[0061] Specifically, when the heat exchange plate 2 is configured to cool the battery, the first flow path section may be the front section of the flow path, and the second flow path section may be the rear section of the flow path. In the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region. Therefore, the low-temperature working medium in the first flow path section can be used to exchange heat better for the post region of the battery that generates higher heat on the battery. When the working medium flows into the second flow path section, the heat exchange efficiency of the working medium decreases. In this case, in the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region. Therefore, the working medium in the second flow path section can be used to exchange heat between the heat exchange plate and the non-post region of the battery that generates lower heat, thereby making full use of the heat exchange efficiency of different stages of the flow path on the heat exchange plate and improving the heat exchange effect of the heat exchange plate.

[0062] Specifically, when the heat exchange plate 2 is configured to heat the battery, the second flow path section may be the front section of the flow path, and the first flow path section may be the rear section of the flow path. In the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region. Therefore, the high-temperature working medium in the second flow path section can be used to exchange heat better for the non-post region of the battery having lower heat. When the working medium flows into the first flow path section, the heat exchange efficiency of the working medium decreases. In this case, in the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region. Therefore, the working medium in the first flow path section can be used to exchange heat between the heat exchange plate and the post region of the battery having relatively low temperature, which can also improve the heat exchange effect of the heat exchange plate.

[0063] In one embodiment, referring to FIG. 5, the first flow path section connected to the first terminal end 221 and the second flow path section connected to the second terminal end 222 form a circulation flow path. The extending region of the black solid line in FIG. 11 may correspond to the first flow path section, and the flow path between the end of the black solid line and the second terminal end may correspond to the second flow path section. Obviously, the first flow path section extends and mainly exchanges heat in the first type region, while the second flow path section extends and mainly exchanges heat in the second type region.

[0064] Optionally, the ratio of the length of the first flow path section to the length of the second flow path section is in the range of 0.5 to 5.

[0065] Specifically, the first flow path section is mainly configured to perform heat exchange between the heat exchange plate and the post region of the battery, and the second flow path section is mainly configured to perform heat exchange between the heat exchange plate and the non-post region of the battery. When the heat exchange plate exchanges heat for the post region that generates significant heat and the battery, the length of the first flow path section can be set to be longer than the length of the second flow path section. For example, the ratio of the length of the first flow path section to the length of the second flow path section is set, where 1 < a ≤ 3. For example, a is 1.2, 1.6, 2.0, 2.4, 2.6, or 2.8. Alternatively, the ratio of the length of the first flow path section to the length of the second flow path section is set, where 2 ≤ a ≤ 5. For example, a is 2.2, 2.6, 3.0, 3.4, 3.6, 3.8, 4.0, 4.4, 4.6, or 5. Alternatively, the ratio of the length of the first flow path section to the length of the second flow path section is set, where 3 ≤ a ≤ 5. For example, a is 3.0, 3.4, 3.6, 3.8, 4.0, 4.4, 4.6, or 5. Alternatively, the ratio of the length of the first flow path section to the length of the second flow path section is set, where 1 < a ≤ 2. For example, a is 1.2, 1.6, or 2.0. Alternatively, 2 ≤ a ≤ 4. For example, a is 2.2, 2.6, 3.0, 3.4, 3.6, 3.8, or 4.0. In this way, the heat exchange plate can prioritize heat exchange for different regions according to the battery heat exchange mode.

[0066] Optionally, the ratio of the width of the second type region to the width of the first type region is in the range of 1 to 8.

[0067] Specifically, referring to FIG. 5, the second type region 27 may include a first partition region 271. The first type region 26 includes a third sub-region 2621 and a first sub-region 2611. The first partition region 271 is located between the third sub-region 2621 and the first sub-region 2611. The width of the second type region may include the width H2 of the first partition region 271. The width of the first type region may include the width H1 of the third sub-region 2621 and the width H3 of the first sub-region 2611. The width H1 of the third sub-region 2621 may be the same as or different from the width H3 of the first sub-region 2611.

[0068] The first type region 26 is arranged corresponding to the post region of the battery, and the second type region 27 is arranged corresponding to the non-post region of the battery. The post region of the battery is mainly used to connect the battery core in the battery to an external device, while the non-post region of the battery is mainly used to arrange the battery core. To ensure the battery capacity, the non-post region of the battery is larger than the post region of the battery. To implement the correspondence between different regions of the heat exchange plate and the high-temperature region and the low-temperature region of the battery for heat exchange, the width of the second type region can be set to be larger than the width of the first type region. For example, the width H2 of the first partition region 271 is larger than the width H1 of the third sub-region 2621. Specifically, the ratio of the width H2 of the first partition region 271 to the width H1 of the third sub-region 2621 may be 2, 3, 4, 5, or 6, and / or the width H2 of the first partition region 271 is larger than the width H3 of the first sub-region 2611. Specifically, the ratio of the width H2 of the first partition region 271 to the width H3 of the first sub-region 2611 may be 4, 5, 6, 7, or 8, thereby improving the heat exchange flexibility of the heat exchange plate for the battery.

[0069] Optionally, the ratio of the width of the first type region to the length of the battery is in the range of 0.1 to 0.4, and the ratio of the width of the second type region to the length of the battery is in the range of 0.1 to 0.6.

[0070] Specifically, the battery post may be located at one end of the battery along the length direction of the battery, or the battery post may be located at two ends of the battery along the length direction of the battery. The first type region 26 is arranged corresponding to the battery post region, and the second type region 27 is arranged corresponding to the non-post region of the battery. Therefore, the ratio of the width of the first type region to the length of the battery corresponds to the ratio of the width of the post region to the length of the battery, and the ratio of the width of the second type region to the length of the battery corresponds to the ratio of the width of the non-post region to the length of the battery. In order to increase the size of the non-post region for arranging the battery core while ensuring that the battery is connected outside through the post, the ratio of the width of the second type region to the length of the battery can be set to be larger than the ratio of the width of the first type region to the length of the battery. For example, the ratio of the width of the first type region to the length of the battery is in the range of 0.1 to 0.4, and the ratio of the width of the second type region to the length of the battery is in the range of 0.1 to 0.6. In addition, for batteries of different sizes, the width of the battery post region and the width of the non-post region also change correspondingly. Therefore, the ratio of the width of the first type region to the length of the battery and the ratio of the width of the second type region to the length of the battery are also adjusted correspondingly.

[0071] In one embodiment, when exchanging heat for a battery having a length of 1.2 m of the heat exchange plate, the ratio of the width of the first type region to the length of the battery is in the range of 0.05 to 0.3, and the ratio of the width of the second type region to the length of the battery is in the range of 0.2 to 0.6.

[0072] In another embodiment, when exchanging heat for a battery having a length of 0.8 m of the heat exchange plate, the ratio of the width of the first type region to the length of the battery is in the range of 0.3 to 0.4, and the ratio of the width of the second type region to the length of the battery is in the range of 0.1 to 0.4.

[0073] The first type of region may correspond to the high-temperature region of the battery. The high-temperature region of the battery may be a region of the battery where the temperature changes significantly. For example, the high-temperature region is a region of the battery that is 5°C to 10°C higher than the normal operating temperature of the battery. The second type of region may correspond to the low-temperature region of the battery. The low-temperature region of the battery may be a region of the battery where the temperature changes slightly. For example, the low-temperature region is a region of the battery that is 0°C to 5°C higher than the normal operating temperature of the battery.

[0074] Optionally, referring to FIGS. 3 and 4, the heat exchange plate 2 includes a first type of region 26 and a second type of region 27, and the flow path 21 is distributed in the first type of region 26 and the second type of region 27.

[0075] When the heat exchange plate 2 is configured to exchange heat for the battery, the working medium circulates at least once through the first type of region 26 and the second region 27.

[0076] When the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first terminal portion 221 through the first type of region 26 and the second type of region 27, and flows into the second terminal portion 222 from the second type of region 27.

[0077] When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second terminal portion 222 through the second type of region 27 and the first type of region 26, and flows into the first terminal portion 221 from the first type of region 26.

[0078] Specifically, when the heat exchange plate 2 is configured to cool the battery through a low-temperature working medium, the working medium flows into the heat exchange plate 2 from the first terminal end 221, then flows from the flow path 21 in the first type region 26 to the flow path 21 in the second type region 27, and finally flows out of the heat exchange plate 2 from the second terminal end 222. To improve the heat exchange effect of the heat exchange plate 2 for the battery and ensure the long-term stable operation of the battery, when the heat exchange plate 2 is configured to heat the battery through a high-temperature working medium, the working medium flows into the heat exchange plate 2 from the second terminal end 222, then flows from the flow path 21 in the second type region 27 to the flow path 21 in the first type region 26, and finally flows out of the heat exchange plate 2 from the first terminal end 221.

[0079] When the heat exchange plate 2 is in the cooling mode, the flow path 21 is designed such that the working medium can flow from the first type region 26 to the second type region 27. That is, the flow path 21 is designed such that the working medium first flows into the flow path in the first type region 26 and then into the flow path in the second type region 27. In this way, the working medium can first perform heat exchange in the first type region 26, and the working medium preferentially absorbs the heat generated by the battery corresponding to the first type region 26. Then, the heat exchange capacity of the working medium decreases. Thereafter, the working medium flows into the second type region 27 and exchanges heat with the heat generated by the battery corresponding to this region. Finally, the working medium flows to the second terminal end 222 and flows out of the heat exchange plate 2.

[0080] On the one hand, when the heat exchange plate 2 is in the heating mode, the flow path 21 is designed such that the working medium can flow from the second type region 27 to the first type region 26. That is, the flow path is designed such that during countercurrent flow, the working medium can first flow into the flow path in the second type region 27 and then flow into the flow path in the first type region 26. The working medium can first exchange heat with the second type region 27 and dissipate heat to the battery space corresponding to the second type region 27. Thereafter, the heat exchange capacity of the working medium decreases, and the working medium flows into the first type region 26. The working medium dissipates the remaining heat in the first type region 26 to the space where the battery is located, then flows back to the first end portion 221 and flows out of the heat exchange plate 2.

[0081] To improve the efficiency of heat exchange between the working medium and the battery when the working medium flows in the first type region 26 and the second type region 27, the flow paths 21 in the first type region 26 and the second type region 27 can be set as circulation flow paths. For example, in order to bend to form one or more circulation flow paths, the flow path 21 can change direction one or more times in the first type region 26, or the flow path 21 can change direction one or more times in the second type region 27, or the flow path 21 can change direction in both the first type region 26 and the second type region 27, whereby the working medium circulates one or more times in the first type region 26 and the second type region 27, thereby improving the heat exchange efficiency of the heat exchange plate 2.

[0082] For example, the first type region 26 and the second type region 27 are arranged adjacent to each other, the first end portion 221 is arranged close to the first type region 26, and the second end portion 222 is arranged close to the second type region 27. When the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first end portion 221 through the first type region 26 and the second type region 27. In order to form a circulating flow, the working medium can bend and change direction in the first type region 26, or the working medium can bend and change direction in the second type region 27 to form a circulating flow, and finally flows into the second end portion 222 from the second type region 27, whereby the working medium circulates at least once in the first type region 26 and the second type region 27.

[0083] When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second end portion 222 through the second type region 27 and the first type region 26. In order to form a circulating flow, the working medium can bend and change direction in the second type region 27, or the working medium can bend and change direction in the first type region 26 to form a circulating flow, and finally flows into the first end portion 221 from the first type region 26, whereby the working medium circulates at least once in the first type region 26 and the second type region 27.

[0084] Optionally, at least a part of the flow path 21 is a curved flow path.

[0085] Specifically, when the working medium flows into the heat exchange plate 2, in order to fully utilize the heat exchange effect of the working medium during the phase change, and to avoid the working medium flowing linearly into and out of the flow path 21, the flow paths 21 in the first type region 26 and the second type region 27 can be arranged as curved flow paths. For example, the flow paths 21 in the first type region 26 and the second type region 27 can be arranged as circulating zigzag flow paths or annular flow paths to increase the length of the flow path 21 in the heat exchange plate 2, thereby increasing the effective heat exchange area of the heat exchange plate 2 and increasing the heat exchange amount of the heat exchange plate 2 for the battery.

[0086] Optionally, referring to FIG. 5, the first terminal end 221 and the second terminal end 222 are located on the same side portion of the heat exchange plate 2.

[0087] Specifically, the shape of the heat exchange plate 2 can match the shape structure of the battery (which may refer to the shape of the large surface of the battery). For example, when exchanging heat for a rectangular battery, the heat exchange plate 2 can be set to be rectangular. When exchanging heat for a rhombic battery, in order to ensure the desired heat exchange after the heat exchange plate 2 and the battery come into contact with each other, the heat exchange plate 2 can be set to be rhombic. When the first terminal end 221 and the second terminal end 222 are located on the same side portion of the heat exchange plate 2, regardless of whether the working medium enters the heat exchange plate from the first terminal end 221 or from the second terminal end 222, the working medium can flow to another side portion of the heat exchange plate 2 (different from the side portion where the first terminal end 221 and the second terminal end 222 are arranged) and the intermediate region of the heat exchange plate 2. This facilitates the circulating flow of the working medium in the heat exchange plate 2 and improves the heat exchange amount of the heat exchange plate 2 for the battery.

[0088] In a specific embodiment, the heat exchange plate 2 is rectangular and coincides with the rectangular battery. The first terminal end 221 and the second terminal end 222 are located on the short side of the heat exchange plate 2 and are close to each other. When the working medium enters the heat exchange plate 2 from the first terminal end 221 or the second terminal end 222, it can flow through the two long sides, the other short side, and the middle region of the heat exchange plate 2, and finally flow out of the heat exchange plate 2 from the second terminal end 222 or the first terminal end 221, forming a circulating flow of the working medium in the heat exchange plate 2.

[0089] Optionally, referring to FIGS. 13 and 14, the heat exchange plate 2 includes an inlet and outlet assembly 22, and the first terminal end 221 and the second terminal end 222 are located at the inlet and outlet assembly 22.

[0090] Specifically, the inlet and outlet assembly 22 has a first terminal end 221 and a second terminal end 222. The first terminal end 221 and the second terminal end 222 are respectively connected to the two ends of the flow path 21, and the first terminal end 221 and the second terminal end 222 can be configured to connect the heat exchange plate 2 to an external component that provides the working medium. For example, in order to ensure the flow stability of the working medium in the heat exchange plate 2, an external pump can be connected to the heat exchange plate 2 through the first terminal end 221 and the second terminal end 222.

[0091] Optionally, referring to FIGS. 3 and 4, the heat exchange plate includes a first type region 26 and a second type region 27, and the flow paths are distributed in the first type region 26 and the second type region 27.

[0092] The first type region 26 includes a first partition 261 and a second partition 262.

[0093] The second type region 27 includes a first partition region 271, and the first partition region 271 is located between the first partition 261 and the second partition 262.

[0094] When the heat exchange plate 2 is configured to exchange heat for the battery, the working medium circulates at least once in the first partition 261, the first partition region 271, and the second partition 262.

[0095] The first type region 26 is arranged corresponding to the post region of the battery, and the second type region 27 is arranged corresponding to the non-post region of the battery.

[0096] Specifically, in order to improve the efficiency of heat exchange between the working medium and the battery when the working medium flows in the first partition 261, the first partition region 271, and the second partition 262, the flow paths 21 in the first partition 261, the first partition region 271, and the second partition 262 can be arranged as circulation flow paths. For example, the flow path 21 bends to form one or more circulation flow paths after changing directions multiple times in the first partition 261, the first partition region 271, and the second partition 262, so that the working medium circulates once or multiple times in the first partition 261, the first partition region 271, and the second partition 262, thereby improving the heat exchange efficiency of the heat exchange plate 2.

[0097] When the heat exchange plate 2 is configured to exchange heat for the battery, the first type region 26 corresponds to the region where the battery core generates higher heat in the battery, and the second type region 27 corresponds to the region where the battery core generates lower heat in the battery. In the embodiments shown in FIGS. 5 and 6, the battery cores of the battery can be arranged side by side in two rows. Since the posts for electrical connection are usually arranged at both ends of the battery core, the post regions at both ends of the battery formed by the battery core generate higher heat, while the intermediate region of the main body of the battery core generates lower heat. The first type region 26 can be arranged corresponding to the post regions at both ends of the battery, and the second type region 27 can be arranged corresponding to the non-post region in the middle of the battery.

[0098] Optionally, the post region of the battery may include a positive electrode position and a negative electrode position, the positive electrode position and the negative electrode position are respectively located at both ends of the battery, whereby the first partition 261 faces the positive electrode position, and the second partition 262 faces the negative electrode position.

[0099] In one embodiment, when the heat exchange plate 2 cools the battery through the working medium, the working medium flows simultaneously from the flow paths 21 of the first partition 261 and the second partition 262 separated from each other to the flow path 21 of the second type region 27 (in this case, the flow paths 21 of the first partition 261 and the second partition 262 may have separate independent working medium inlets). In this case, the working medium may be a low-temperature working medium. The low-temperature and low-pressure working medium first cools the positive electrode position and the negative electrode position of the battery that generate higher heat, and then cools other regions of the battery to ensure the temperature uniformity of the battery.

[0100] When the heat exchange plate 2 heats the battery through the working medium, the working medium flows from the flow path 21 of the second type region 27 to the flow paths 21 of the first partition 261 and the second partition 262. In this case, the working medium may be a high-temperature working medium. The high-temperature working medium first heats the regions of the battery that generate lower heat other than the positive electrode position and the negative electrode position, and then heats the positive electrode position and the negative electrode position of the battery to ensure temperature uniformity of the battery.

[0101] In another embodiment, when the heat exchange plate 2 cools the battery through the working medium, the working medium can flow from the flow path 21 of the first partition 261 to the flow path 21 of the second partition (in this case, the flow paths 21 of the first partition 261 and the second partition 262 may share one working medium inlet), and can flow from the flow path 21 of the second partition 262 to the flow path 21 of the second type region 27.

[0102] Specifically, all of the working media flowing through the first partition 261 and the second partition 262 converge within the flow path 21 of the second type region 27. When the heat exchange requirement of the first partition 261 is higher than that of the second partition 262, in order to improve the heat exchange flexibility of the heat exchange plate 2 in the battery, the working medium in the first partition 261 first flows through the second partition 262, then flows back to the second partition 262, and the working medium in the second partition 262 can flow directly into the flow path 21 of the second type region 27.

[0103] In one embodiment, the left longitudinal region in FIG. 3 belongs to the second partition 262 of the first type region 26, the middle longitudinal region belongs to the first partition region 271 of the second type region 27, and the right longitudinal region also belongs to the first partition 261 of the first type region 26. Thereby, to ensure the heat exchange amount of the heat exchange plate 2 for the battery, the first type region 26 corresponds to the region that generates higher heat, and the second type region 27 corresponds to the region of the battery that generates lower heat.

[0104] Furthermore, the first end portion 221 and the second end portion 222 are disposed on the side portion of the first partition 261 away from the second partition 262, whereby the working medium can pass through the first partition 261, the first partition region 271, and the second partition 262 in sequence and can flow into the heat exchange plate. Both the first partition 261 and the second partition 262 belong to the corresponding regions of the battery that generate higher heat. Therefore, the first partition 261 and the second partition 262 are compatible in structure and function. For example, the first end portion 221 and the second end portion 222 are disposed on the side portion of the second partition 262 away from the first partition 261, which can also achieve efficient heat exchange of the heat exchange plate 2 for the battery. Furthermore, the compatibility in the first type region 26 on the two side portions of the second type region 27 can also be applied to the structure of the heat exchange plate 2 formed by a plurality of groups of the first type region 26 and the second type region 27.

[0105] In addition, the heating of the battery electrode core is usually constant. Regardless of the external environment and whether the battery is in a discharged state or a charged state, as shown in FIG. 2, a part of the battery core provided with posts and electrical connection points is always a region that generates higher heat, and the intermediate region of the battery core generates medium heat, that is, the part of the battery core where the electrical connection points and posts are not provided is not likely to generate heat. When heating is required, the region of the battery core without posts often becomes cooler and requires more heat. When cooling is required, the region of the battery core with posts often becomes hotter and requires better cooling. The advantage of this design is that the flow paths of the heat exchange plates are arranged based on the operating characteristics of the battery core in the battery according to different regions with different heat generations. Furthermore, the flow directions of the working media used in the heating mode and the cooling mode are opposite. During heat dissipation, the working media first flow along the flow paths to the regions with higher heat. During heating, the working media first flow along the flow paths to the regions with lower heat. This makes it possible for the working media to maintain high efficiency of heat exchange with the regions of the battery that generate higher heat.

[0106] When the battery cores of the battery are arranged in other ways, or when the battery cores are electrically connected in other ways, the positions and numbers of the first type region 26 and the second type region 27 are different. This technical solution uses, as an example, the cases shown in FIGS. 3 and 4. FIGS. 3a and 4a are schematic diagrams of the flow directions of the flow paths in the heat exchange plate 2. FIGS. 3b and 4b are schematic diagrams of the region division of the heat exchange plate 2. The design characteristics of this part are described. Optionally, referring to FIG. 3, The first type region 26 includes a fourth sub-region 2622, The second type region 27 includes a second partition region 272.

[0107] When the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first end portion, through the fourth sub-region 2622, the second partition region 272, and the fourth sub-region 2622, and flows into the second end portion from the fourth sub-region 2622.

[0108] When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second end portion, through the fourth sub-region 2622, the second partition region 272, and the fourth sub-region 2622, and flows into the first end portion from the fourth sub-region 2622.

[0109] Specifically, the heat exchange plate 2 may include the fourth sub-region 2622 and the second partition region 272 arranged adjacent to each other, and the first end portion 221 and the second end portion 222 may be located on the side portion of the fourth sub-region 2622 away from the second partition region 272. The heat exchange plate 2 is configured to exchange heat for the battery with the posts on a single side portion.

[0110] When the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first end portion 221, through the fourth sub-region 2622, the second partition region 272, and the fourth sub-region 2622. The working medium in the fourth sub-region 2622 can quickly cool the region of the battery that generates higher heat, and then the working medium in the second partition region 272 cools the region of the battery that generates lower heat. Finally, the working medium flows from the fourth sub-region 2622 to the second end portion 222.

[0111] When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second end portion, through the fourth sub-region 2622, the second partition region 272, and the fourth sub-region 2622, and flows into the first end portion from the fourth sub-region 2622.

[0112] In addition, the first end portion 221 and the second end portion 222 can also be located on the fourth sub-region 2622 and the second partition region 272, respectively. Thereby, when the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first end portion 221 through the fourth sub-region 2622 and the second partition region 272. When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second end portion through the second partition region 272 and the fourth sub-region 2622. Thus, when cooling the battery, the low-temperature working medium flows from the fourth sub-region 2622 corresponding to the high-temperature region of the battery to the second partition region 272 corresponding to the low-temperature region of the battery. When heating the battery, the high-temperature working medium flows from the second partition region 272 corresponding to the low-temperature region of the battery to the fourth sub-region 2622 corresponding to the high-temperature region of the battery.

[0113] Optionally, referring to FIG. 3, the first type region 26 includes a fourth sub-region 2622 and a second sub-region 2612.

[0114] The second type region 27 includes a second partition region 272, and the second partition region 272 is located between the fourth sub-region 2622 and the second sub-region 2612.

[0115] When the heat exchange plate 2 is configured to cool the battery, the working medium flows into the fourth sub-region 2622, the second partition region 272, and the second sub-region 2612 from the first end portion, flows back from the second sub-region 2612 to the second partition region 272 and the fourth sub-region 2622, and then flows into the second end portion.

[0116] When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second terminal end, into the fourth sub-region 2622, the second partition region 272, and the second sub-region 2612, flows back from the second sub-region 2612 into the second partition region 272 and the fourth sub-region 2622, and then flows into the first terminal end.

[0117] Specifically, the first terminal end 221 and the second terminal end 222 may be located on the side portions of the fourth sub-region 2622 away from the second partition region 272. The heat exchange plate 2 is configured to exchange heat for the battery with the posts on the two side portions.

[0118] When the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first terminal end 221 through the fourth sub-region 2622, the second partition region 272, and the second sub-region 2612. The working medium in the fourth sub-region 2622 and the second sub-region 2612 can rapidly cool the regions of the battery that generate higher heat, and then the working medium in the second partition region 272 cools the regions of the battery that generate lower heat. Finally, the working medium flows back from the second sub-region 2612 into the second partition region 272 and the fourth sub-region 2622, and then flows into the second terminal end 222.

[0119] When the heat exchange plate 2 is configured to heat the battery, the working medium flows from the second terminal end, into the fourth sub-region 2622, the second partition region 272, and the second sub-region 2612, flows back from the second sub-region 2612 into the second partition region 272 and the fourth sub-region 2622, and then flows into the first terminal end.

[0120] In addition, two first terminal ends 221 may be arranged, and the two first terminal ends 221 may be respectively located on the fourth sub-region 2622 and the second sub-region 2612, and the second terminal end 222 is arranged on the second partition region 272.

[0121] Optionally, the heat exchange plate includes a plurality of heat exchange modules, and the working medium circulates between the plurality of heat exchange modules, and the working medium circulates at least once in each of the heat exchange modules.

[0122] Specifically, referring to FIGS. 5 and 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 spaced apart from each other, and at least a part of the flow path 21 is curved in each of the first heat exchange module and the second heat exchange module, whereby 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.

[0123] Specifically, when the heat exchange plate 2 exchanges heat for the battery, the first type region 26 and the second type region 27 on the heat exchange plate 2 may correspond to the heat generation regions of the battery in order to ensure the heat exchange effect of the heat exchange plate 2 for the battery. The actual structure of the battery may be composed of a group of battery cores, or may be composed of a plurality of groups of arranged battery cores. For example, when the heat exchange plate 2 exchanges heat for a battery composed of two groups of battery cores, 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 cores, and the second heat exchange module corresponds to the other group of battery cores. In addition, at least a part of the flow path 21 is curved in each of the first heat exchange module and the second heat exchange module, whereby the area for arranging the flow path 21 in the first heat exchange module and the second heat exchange module can be increased. Therefore, this increases the effective heat exchange area of the heat exchange plate 2 and the heat exchange amount of the heat exchange plate 2 for the battery.

[0124] In one embodiment, referring to FIGS. 5 and 6, each heat exchange module includes a first type region 26 and a second type region 27.

[0125] The first type region 26 includes a third sub-region 2621, a first sub-region 2611, a fourth sub-region 2622, and a second sub-region 2612.

[0126] The second type region 27 includes a first partition region 271 and a second partition region 272.

[0127] The first partition region 271 is located between the third sub-region 2621 and the first sub-region 2611, whereby the first partition region 271, the third sub-region 2621, and the first sub-region 2611 form the first heat exchange module. At the same time, the second partition region 272 is located between the fourth sub-region 2622 and the second sub-region 2612, whereby the second partition region 272, the fourth sub-region 2622, and the second sub-region 2612 form the second heat exchange module. Also, the first sub-region 2611 and the fourth sub-region 2622 are arranged adjacent to each other, whereby the first heat exchange module and the second heat exchange module are arranged adjacent to each other, ensuring that the heat exchange plate 2 effectively exchanges heat for a battery composed of a plurality of groups of battery cores.

[0128] In one embodiment, as shown in FIG. 5, the flow path 21 includes a first flow convergence end and a second flow convergence end. The first flow convergence end is a connection point where the flow path 21 converges to the first terminal end 221. The second flow convergence end is a connection point where the flow path 21 converges to the second terminal end 222.

[0129] When the heat exchange plate 2 is configured to cool the battery, the working medium can flow into the heat exchange plate 2 from the first flow convergence end. The working medium in the flow path 21 preferentially flows into the first type region 26 corresponding to the region of the battery having a higher temperature, thereby cooling the high temperature region of the battery, and then flows into the second type region 27. Finally, the working medium can flow out from the second flow convergence end after convergence.

[0130] When the heat exchange plate 2 is configured to heat the battery, the working medium can flow into the heat exchange plate from the second flow convergence end. The working medium in the flow path preferentially flows into the second type region 27 corresponding to the region of the battery having a lower temperature, thereby heating the low temperature region of the battery, and then flows into the first type region 26. Finally, the working medium can flow out from the first flow convergence end after convergence. Prioritizing the heating at the position corresponding to the second type region 27 can better protect the battery and provide a sufficient operating temperature for the battery. In particular, when the battery has a self-heating function, the heat exchange plate can cooperate with the self-heating function to better provide temperature protection for the central region of the electrode core where it is difficult to prevent an overly low temperature by generating heat.

[0131] In practical applications, as shown in FIG. 5, the first flow convergence end and the second flow convergence end are concentrated on the left side of the heat exchange plate 2. When arranging the flow path 21, due to the limitation of the panel space, there may be a possibility that the flow path cannot be arranged in the above ideal way. In the embodiment shown in FIG. 5, for the three regions of the fourth sub-region 2622, the second partition region 272, and the second sub-region 2612 located on the right side, the second partition region 272 can be preferentially heated, or the fourth sub-region 2622 and the second sub-region 2612 can be preferentially cooled according to the preferential arrangement of the flow path. In the three regions of the first partition region 271, the third sub-region 2621, and the first sub-region 2611 on the left side close to the flow convergence end, due to the relative density of the flow path 21, the above preferential arrangement cannot be implemented. In this regard, the following embodiments can be adopted. That is, the flow path 21 is introduced from the first flow convergence end, and then is first arranged in the first sub-region 2611, and then extends to the two regions of the first partition region 271 and the third sub-region 2621, and finally returns to the second flow convergence end.

[0132] Optionally, referring to FIG. 5, in the first heat exchange module, when the heat exchange plate 2 is configured to exchange heat for the battery, the working medium circulates at least once in the flow paths of the third sub-region 2621, the first partition region 271, and the first sub-region 2611.

[0133] When the working medium flows within the third sub-region 2621, the first partition 271, and the first sub-region 2611, in order to improve the efficiency of heat exchange between the working medium and the battery, the flow paths 21 within the third sub-region 2621, the first partition region 271, and the first sub-region 2611 can be arranged as circulation flow paths. For example, when extending into the third sub-region 2621, the first partition region 271, and the first sub-region 2611, the flow path 21 may change direction in the third sub-region 2621, then extend into the first partition region 271, then extend from the first partition region 271 to the third sub-region 2621, and then may change direction. After changing direction multiple times in the third sub-region 2621, the first partition region 271, and the first sub-region 2611, the flow path 21 bends to form one or more circulation flow paths, whereby the working medium circulates one or more times in the third sub-region 2621, the first partition region 271, and the first sub-region 2611, thereby improving the heat exchange efficiency of the heat exchange plate 2 for heat exchange.

[0134] Optionally, in the second heat exchange module, the first terminal end 221 may be connected to the fourth sub-region 2622, and the second terminal end 222 may be connected to the second partition region 272.

[0135] When the heat exchange plate 2 is configured to cool the battery, the working medium flows into the first heat exchange module from the first terminal end 221, passes through the first heat exchange module and flows into the fourth sub-region 2622, the second partition region 272, and the second sub-region 2612, flows into the second partition region 272 from the fourth sub-region 2622 and the second sub-region 2612, and then flows into the second terminal end 222.

[0136] When the heat exchange plate 2 is configured to heat the battery, the working medium flows into the second partition region 272 from the second terminal end 222, flows into the fourth sub-region 2622 and the second sub-region 2612 from the second partition region 272, and then flows into the first terminal end 221.

[0137] Optionally, the flow path 21 includes a flow branch point 212, the first end portion 221 is disposed on one side of the third sub-region 2621, and the number of flow branch points 212 in the third sub-region 2621 is greater than the number of flow branch points 212 in the first partition region 271.

[0138] Specifically, the first end portion 221 is disposed on one side of the third sub-region 2621. When the heat exchange plate 2 is configured to cool the battery, the working medium can pass through the first end portion 221 at a low temperature and then flow through the third sub-region 2621 and the first partition region 271 in sequence. For example, the working medium passing through the first end portion 221 is in a liquid state. When the number of flow branch points 212 in the third sub-region 2621 is greater than the number of flow branch points 212 in the first partition region 271, more flow branch points 212 can be arranged in the third sub-region 2621, that is, in the flow process of the working medium in the third sub-region 2621, the flow branch point 212 can increase the flow path. Also, the working medium in the liquid state can ensure a balanced distribution during branching, and the temperature uniformity of the heat exchange plate 2 during heat exchange can be improved.

[0139] When the heat exchange plate 2 is configured to cool the battery, the flow branch point 212 is configured to branch. When the heat exchange plate 2 is configured to heat the battery, due to the reverse direction of the working medium in the flow path, the flow branch point 212 can be configured to converge.

[0140] Optionally, the number of flow branch points 212 in the first type region 26 is greater than the number of flow branch points 212 in the second type region 27.

[0141] Specifically, when the heat exchange plate 2 is configured to cool the battery, the working medium flows from the first terminal portion 221 at a low temperature, through the first type region 26 and the second type region 27, and into the second terminal portion 222 from the second type region 27. For example, the working medium is in a liquid state when flowing through the first type region 26 from the first terminal portion 221. When the number of flow branch points 212 in the first type region 26 is greater than the number of flow branch points 212 in the second type region 27, more flow branch points 212 can be arranged in the first type region 26, that is, in the flow process of the working medium in the first type region 26, the flow branch point 212 can increase the flow path. Also, the working medium in the liquid state can ensure a balanced distribution during the branching.

[0142] In one embodiment, when the heat exchange plate 2 is configured to exchange heat for the battery, the flow path 21 performs the first branching of the third sub-region 2621. That is, the flow branch point 212 can perform convergence or branching when the working medium flows into the third sub-region 2621. Also, when the flow branch point 212 in the third sub-region 2621 is configured to branch, in order to ensure a balanced distribution of the working medium during the branching, the working medium in the liquid state can be branched by the flow branch point 212.

[0143] Optionally, when the heat exchange plate 2 is configured to cool the battery, the flow path branches once in the third sub-region 2621, and then performs the second branching and the first convergence in the first sub-region 2611.

[0144] When the heat exchange plate 2 is configured to heat the battery, the flow path branches in the first sub-region 2611, then performs the first convergence in the first sub-region 2611, and performs the second convergence in the third sub-region 2621.

[0145] Optionally, when the heat exchange plate 2 is configured to cool the battery, the flow path branches in the fourth sub-region 2622 and the second sub-region 2612 and then converges in the second partition region 272.

[0146] When the heat exchange plate 2 is configured to heat the battery, the flow path branches in the second partition region 272 and then converges in the fourth sub-region 2622 and the second sub-region 2612.

[0147] As shown in FIGS. 5 and 6, when the heat exchange plate 2 is located in the left region close to the first terminal end 221 and the second terminal end 222, that is, in the first heat exchange module formed by the first partition region 271, the third sub-region 2621, and the first sub-region 2611, and when the space of the first heat exchange module is close to the first terminal end 221 and the second terminal end 222, the flow path 21 of the first heat exchange module is dense. Therefore, in this solution, it is preferable to arrange the flow bifurcation points in two regions, the third sub-region 2621 and the first sub-region 2611. These two regions correspond to the high heating regions of the battery. Performing branching and convergence in these regions helps to reduce the high-speed and concentrated heat exchange of the working medium in a narrow space, so that the working medium can perform heat exchange more evenly in these regions.

[0148] For example, the working medium flowing from the first flow convergence end concentrates at the corner of the third sub-region 2621, and the first branching occurs, and then the second branching can occur at the upper part of the first sub-region 2611. Thereafter, some flow paths can branch again at the lower part of the first partition region 271, while other flow paths do not need to branch. Finally, when the flow path extends to the lower part of the third sub-region 2621, the flow path can concentrate and converge and then return to the second flow convergence end. Usually, the flow convergence can be performed one or two times. The above description uses cooling as an example. During heating, the forms of branching and convergence are completely opposite.

[0149] Optionally, as shown in FIGS. 5 and 6, in the right region away from the first end portion 221 and the second end portion 222, that is, in the second heat exchange module formed by the second partition region 272, the fourth sub-region 2622, and the second sub-region 2612, the space for the flow path arrangement is relatively large. This solution can preferentially and evenly distribute the flow branch points at the upper and lower ends of the three regions, and the number of times of flow branching and convergence can correspondingly be larger. Using a cooling solution as an example, the flow path extending from the first flow convergence end on the left side to the right side can branch separately and extend into the fourth sub-region 2622 and the second region 2612. In these two regions, the flow path can extend linearly and can extend longitudinally across most of the areas of the two regions. Then, the flow path can bend towards the second partition region 272 between the fourth sub-region 2622 and the second sub-region 2612. The flow path usually extends linearly through the second partition region 272, and finally, the parallel flow paths converge at the lower side of the second partition region 272. Finally, the flow path extends to the left and returns to the second flow convergence end.

[0150] In this solution, the flow path can branch two or three times in order to achieve the layout characteristics of a large-area parallel and long-distance extension. Then, the flow path converges two to three times to converge to the trunk and returns to the flow convergence end. Similarly, in the heating mode, the working medium flows in from the second flow convergence end, directly flows to the lower side of the second partition region 272, and branches multiple times to form a plurality of parallel paths.

[0151] Optionally, referring to FIG. 3, at least a part of the flow path 21 branches at least once in the process of extending from the first partition 261 to the first partition region 271, and the flow path 21 converges at least once in the process of extending from the first partition 261 to the first partition region 271.

[0152] In particular, the working medium in this solution can be preferentially selected as a cooling working medium that can be switched between a gas phase and a liquid phase. This type of cooling working medium can effectively perform heat exchange through a phase state change and has a higher heat exchange efficiency than conventional water cooling, coolants, and other methods. This cooling solution is used as an example. When at least a part of the flow path 21 branches at least once in the process of extending from the first partition 261 to the first partition region 271, more flow paths can be arranged on the heat exchange plate to increase the heat exchange efficiency of the heat exchange plate. When the flow path converges at least once in the process of extending from the first partition 261 to the first partition region 271, the end portions of the flow paths of the heat exchange plate can be concentrated, and the structural compactness of the heat exchange plate can be improved.

[0153] In contrast, due to the phase state change of the cooling working medium, when the cooling working medium is concentrated in a certain region and undergoes a significant phase change, other regions cannot obtain a good heat exchange effect. In this regard, this solution uses a flow branching method such as branching one flow path into two as much as possible and branching two flow paths into four, as shown in the flow branching methods in regions a, b, c, and d of FIG. 15, to improve the uniformity of the working medium flow in the flow path. Furthermore, this solution uses a plurality of parallel flow paths whose lengths change as evenly as possible to jointly perform heat exchange in the first type region and the second type region, and further reduce the concentrated phase change of the working medium caused by uneven flow.

[0154] Optionally, referring to FIG. 12, the flow path 21 includes a trunk circulation flow path 100. The trunk circulation flow path 100 is distributed on the edge of the heat exchange plate. One end of the trunk circulation flow path 100 is connected to the first end portion 221, and the other end of the trunk circulation flow path 100 is connected to the second end portion 222. The trunk circulation flow path 100 branches at most three times in the first type region 26.

[0155] Specifically, among the flow paths 21 introduced from the first end portion 221, the outermost flow trunk portion circulation flow path 100 basically does not branch after branching one or two times, goes around the outer edge portion of the heat exchange plate, and finally converges again at a position close to the second end portion 222. These flow paths are configured to balance the temperature of the working medium at the ends of the flow. In particular, when a phase change cooling working medium is used, these flow paths can play a better role. The volume of the working medium after phase change changes greatly, which is likely to cause problems such as deposition, poor circulation, and temperature concentration. This problem is likely to become very serious at the flow convergence end. The working medium in the outermost circulating flow path branches fewer times, so that the working medium in the outermost flow path has a relatively small phase change, and can be configured to balance the temperature and phase state of the working medium in other flow paths at the end of the entire circulation. This ensures the smoothness and uniformity of the entire circulation.

[0156] Optionally, referring to FIG. 6, the heat exchange plate includes a first region, the first region corresponds to the battery protruding region of the battery on the heat exchange plate, and the trunk portion circulation flow path 100 is located on the outer periphery of the battery protruding region.

[0157] Specifically, the first region may be the battery covering region shown in FIG. 6. When the trunk portion circulation flow path 100 is located on the outer periphery of the battery protruding region, the trunk portion circulation flow path can not only exchange heat for the region around the battery, but also ensure the heat exchange of the heat exchange plate for the entire battery, and improve the heat exchange efficiency of the heat exchange plate.

[0158] The trunk portion circulation flow path 100 may be used as the first circulation flow path in the heat exchange plate. In the middle portion of the heat exchange plate, as shown in FIGS. 7 and 8, the second circulation flow path 200, the third circulation flow path 300, and the fourth circulation flow path 400 can also be formed.

[0159] Referring to FIG. 9, the direction change point 211 is formed at the direction change position of the flow path 21. The direction change point includes a first type direction change point 2111 and a second type direction change point 2112. The flow path direction at one end of the second type direction change point 2112 forms a direction change angle with the flow path direction at the other end of the first type direction change point 2111. In order to achieve a flexible direction change of the flow path 21 and ensure the distribution density of the flow path 21 in the heat exchange plate, the flow path 21 can bend by a certain direction change angle when passing through the second type direction change point 2112, for example, it can bend by 90° or 180°.

[0160] Referring to FIG. 10, the flow branch point 212 includes a first stage flow branch point 2121 and a second stage flow branch point 2122. The branch includes a first stage branch. The first stage flow branch point 2121 is connected between the trunk and the first stage branch. The branch includes a second stage branch. The second stage flow branch point 2122 is connected between the first stage branch and the second stage branch.

[0161] Optionally, the heat exchange plate includes a flow path 21, where the flow path is arranged in the heat exchange plate, and the flow path is configured to allow the heat exchange working medium to flow through the flow path, the flow path 21, and a first terminal end 221 and a second terminal end 222, where one end of the flow path is connected to the first terminal end 221, the other end of the flow path is connected to the second terminal end 222, and the first terminal end 221 and the second terminal end 222 are configured to allow the heat exchange working medium to flow into the heat exchange plate, the first terminal end 221 and the second terminal end 222.

[0162] The heat exchange plate includes a first type region 26, and the first type region 26 is arranged corresponding to the post region of the battery. The flow path includes a flow branch point 212, the flow branch point includes a first stage flow branch point 2121, at least one first stage flow branch point is arranged within the first type region, the first stage flow branch point is arranged close to the first terminal end or the second terminal end, and the flow branch point branches the flow path.

[0163] Specifically, the first type region 26 may correspond to a region where the battery core generates higher heat in the battery. Since the battery core needs to provide a post for electrical connection, the heat generated in the post region of the battery core during operation is at a higher temperature, thus forming the post region of the battery. In order to improve the heat exchange efficiency of the heat exchange plate 2, the first type region 26 can be arranged corresponding to the post region of the battery, and the regions on the heat exchange plate other than the first type region can be arranged corresponding to the non-post regions of the main body of the battery core on the battery.

[0164] Specifically, the number of flow paths at the two ends of the flow bifurcation point 212 is different. The flow paths at the two ends of the flow bifurcation point 212 can each be used as an inlet and an outlet of the working medium. In the case of different heat exchanges of the heat exchange plate, the flow path inlets and outlets at the two ends of the flow bifurcation point 212 can be switched with each other, whereby the working medium can flow forward or backward at the flow bifurcation point 212.

[0165] In one embodiment, from the first terminal end 221 to the second terminal end 222, the flow path has at least two flow bifurcation points 212. One of the flow bifurcation points 212 is close to the first terminal end and branches the flow path, and the other flow bifurcation point 212 is close to the second terminal end and converges the flow path.

[0166] Specifically, the two ends of the flow path 21 are either blocked or are respectively connected to the first terminal end 221 and the second terminal end 222 by screws. The flow path 21 of the heat exchange plate branches at least once and converges at least once, and then extends from the first terminal end 221 to the second terminal end 222. In order to form one or more flow branch points 212 on the flow path 21, the above-mentioned flow branching may be to branch one flow path 21 into two, to branch one flow path into three, or to branch one flow path into more. The flow convergence may be to converge two flow paths into one, to converge three flow paths into one, or to converge more flow paths into one.

[0167] In the present disclosure, the flow path includes a flow branch point 212, the flow branch point includes a first-stage flow branch point 2121, at least one first-stage flow branch point is arranged within a first-type region, the first-stage flow branch point is arranged close to the first terminal end or the second terminal end, and the flow branch point branches the flow path. The first-type region is a region corresponding to a post region where the battery core generates more heat in the battery. Therefore, the first-stage flow branch point can change the number of flow paths to increase the distribution density of the flow paths within the first-type region, thereby improving the heat exchange effect of the heat exchange plate.

[0168] Optionally, referring to FIGS. 16 and 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 a first-type region 26.

[0169] The first-type region 26 of the first heat exchange module includes a third sub-region 2621 and a first sub-region 2611, and the first-type region 26 of the second heat exchange module includes a fourth sub-region 2622 and a second sub-region 2612.

[0170] The first-stage flow bifurcation point is disposed within the third sub-region 2621, the flow bifurcation point further includes a second-stage flow bifurcation point 2122, and the second-stage flow bifurcation point is located in at least one of the first sub-region 2611, the second sub-region, and the fourth sub-region.

[0171] Specifically, when the heat exchange plate 2 exchanges heat for the battery, the first type region 26 on the heat exchange plate 2 may correspond to the post region of the battery in order to ensure the heat exchange effect of the heat exchange plate 2 for the battery. The actual structure of the battery may be composed of a group of battery cores, or may be composed of a plurality of groups of arranged battery cores. For example, referring to FIG. 6, when the heat exchange plate 2 exchanges heat for a battery composed of two groups of battery cores, 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 cores, and the second heat exchange module corresponds to the other group of battery cores. In addition, at least a part of the flow path 21 is curved in each of the first heat exchange module and the second heat exchange module, whereby the area for arranging the flow path 21 in the first heat exchange module and the second heat exchange module can be increased. Therefore, this increases the effective heat exchange area of the heat exchange plate 2 and the heat exchange amount of the heat exchange plate 2 for the battery.

[0172] Specifically, the first heat exchange module may be in the left region of FIG. 5, and the second heat exchange module may be in the right region of FIG. 5. The first type region 26 of the first heat exchange module includes a third sub-region 2621 and a first sub-region 2611, and the first type region 26 of the second heat exchange module includes a fourth sub-region 2622 and a second sub-region 2612. The first terminal portion 221 and the second terminal portion 222 may be disposed close to the third sub-region 2621. The first stage flow branch point is a flow branch point close to the first terminal portion 221 and the second terminal portion 222 in the flow path, whereby the first stage flow branch point is disposed within the third sub-region 2621.

[0173] Optionally, the heat exchange plate is a heat exchange region and a battery region, wherein the heat exchange region is disposed around the battery region, and the battery region is the battery protruding region of the battery on the heat exchange plate, the heat exchange region and the battery region, and a flow path 21, wherein the flow path 21 is disposed within the heat exchange plate, and the flow path is configured to allow a heat exchange working medium to flow through the flow path, and the flow path includes a first type flow path and a second type flow path, the flow path 21, and

[0174] The first type flow path is located in the heat exchange region, and the second type flow path is distributed in the battery region.

[0175] Specifically, when the flow path 21 extends within the heat exchange plate, the outermost first type of flow path basically does not branch after branching one or two times, goes around the outer edge of the heat exchange plate, and finally converges again at a position close to the flow path outlet. These flow paths are configured to balance the temperature of the working medium at the end of the flow. In particular, when a phase change cooling working medium is used, these flow paths can play a better role. The volume of the working medium after phase change changes greatly, which is likely to cause problems such as deposition, poor circulation, and temperature concentration. This problem is likely to become very serious at the flow convergence end. The working medium in the outermost circulating flow path branches fewer times, so that the working medium in the outermost flow path has a relatively small phase change and can be configured to balance the temperature and phase state of the working medium in other flow paths at the end of the entire circulation. This ensures the smoothness and uniformity of the entire circulation.

[0176] When the first type of flow path surrounds the battery area and is located on the outer periphery of the battery protruding area, the first type of flow path can not only exchange heat for the area around the battery, but also ensure the heat exchange of the heat exchange plate for the entire battery and improve the heat exchange efficiency of the heat exchange plate.

[0177] The first type of flow path may be used as the first circulation flow path in the heat exchange plate. In the middle part of the heat exchange plate, the second type of flow path including the second circulation flow path, the third circulation flow path, and the fourth circulation flow path can also be formed to improve the heat exchange balance of the heat exchange plate.

[0178] Optionally, the length of the first type of flow path is shorter than the length of the second type of flow path, and / or The number of branchings of the first type of flow path is less than the number of branchings of the second type of flow path.

[0179] Specifically, the first type of flow path is located within the heat exchange region, that is, the first type of flow path circulates around the outer edge of the heat exchange plate, whereby the second type of flow path is located inside the first type of flow path. However, after the first type of flow path branches one or two times, the first type of flow path basically no longer branches. Also, although the number of branches of the first type of flow path is small, the second type of flow path needs to branch multiple times and change direction on the heat exchange plate, whereby the flow paths are evenly distributed on the heat exchange plate. Therefore, in order to ensure the balance of the flow path distribution on the heat exchange plate, the length of the first type of flow path is shorter than the length of the second type of flow path, and the number of branches of the first type of flow path is less than the number of branches of the second type of flow path. One embodiment of the present disclosure further provides a battery pack including a heat exchange plate 2 and a plurality of battery cores 1. Posts are provided at both ends of each battery core. The plurality of battery cores are arranged along a first direction, and in order to increase the energy density of the battery pack, the first direction may be the X direction in FIG. 1. The heat exchange plate is arranged on one or two sides of the battery core 1 along a second direction. The second direction may be the Z direction in FIG. 1. The side surfaces of the plurality of battery cores along the second direction form the large surfaces of the battery cores. The heat exchange plate is arranged close to one or two large surfaces of the battery core, which can ensure the heat exchange effect of the heat exchange plate for the battery core.

[0180] In addition, the plurality of battery cores 1 may form a first battery module 11 and a second battery module 12. The second battery module 12 is located on a side portion of the first battery module 11 away from the inlet and outlet assembly 22. Specifically, the flow path of the first type region 26 may face the first battery module 11 and may be close to the inlet and outlet assembly 22, that is, the flow path of the first type region 26 is located at the proximal end of the heat exchange plate. The flow path 21 of the second type region 27 may be away from the inlet and outlet assembly 22, that is, the flow path of the second type region 27 is located at the distal end of the heat exchange plate. In order to ensure a balanced heat exchange effect at the proximal end and the distal end of the heat exchange plate, the flow rate of the flow path 21 at the distal end can be increased. For example, the flow rate of the flow path in the opposite flow path 21 of the second battery module 12 is set to a second flow rate, and the first flow rate is smaller than the second flow rate.

[0181] Optionally, the direction in which the posts at the two ends of the battery core 1 are connected is a third direction. The third direction may be the Y direction in FIG. 1. The first direction, the second direction, and the third direction may be parallel to the width direction, the height direction, and the length direction of the battery core, respectively. When the first direction, the second direction, and the third direction are perpendicular to each other, the plurality of battery cores may form a small battery pack structure to ensure the energy density of the battery pack.

[0182] Optionally, the heat exchange plate is the lower plate or the upper cover. Specifically, the heat exchange plate can be disposed on one side or two sides of a battery core along the second direction. When the heat exchange plate can be disposed on one side of the battery core along the second direction, for example, when the heat exchange plate is disposed on the lower side of a plurality of battery cores, the heat exchange plate can form the lower plate of the battery pack. On the other hand, when the heat exchange plate is in contact with the battery core, the heat exchange effect of the battery core can be ensured. On the other hand, the battery pack can be well protected when the bottom of the battery pack is impacted. When the heat exchange plate is disposed on the upper side of a plurality of battery cores, the heat exchange plate can form the upper cover of the battery pack. Similarly, when the heat exchange plate is in contact with the battery core, the heat exchange effect of the battery core can be ensured. On the other hand, the battery pack can be protected.

[0183] One embodiment of the present disclosure provides a vehicle including a heat exchange plate or a battery pack.

[0184] According to a third aspect, referring to FIGS. 3 to 18, an embodiment of the present disclosure provides a flow path integrated plate. Referring to FIG. 18, the flow path integrated plate includes a first region 28 and a second region 29, and flow paths 21, wherein the flow paths are distributed in the first region 28 and the second region 29, and an average distribution density of the flow paths 21 in the first region 28 is greater than an average distribution density of the flow paths 21 in the second region 29.

[0185] Specifically, the flow path integrated plate can be configured to cool or heat the battery. For example, when the flow path integrated plate cools the battery, a large amount of heat is generated at the positive electrode position and the negative electrode position during the operation of the battery. That is, the flow path integrated plate needs to provide a better cooling effect for the positive electrode position and the negative electrode position of the battery. When the average distribution density of the flow paths 21 in the first region 28 is greater than the average distribution density of the flow paths 21 in the second region 29, the first region 28 faces the positive electrode position and the negative electrode position of the battery, and the second region 29 can face the middle part of the battery to improve the heat exchange effect of the flow path integrated plate for the battery.

[0186] Optionally, the width of the flow path 21 is less than 15 mm.

[0187] In particular, when the flow path integrated plate provided by the embodiments of the present disclosure faces different heat exchange requirements at different positions, the heat exchange efficiency of the flow path integrated plate can be improved through different distribution densities of the flow paths 21, that is, the flow paths 21 having a narrower width can be used for heat exchange. The width of the flow path 21 may be 3 mm to 12 mm. The width of the flow path 21 is also the radial size of the flow path 21. Optionally, in order to increase the distribution density of the flow paths 21, the width of the flow path 21 can be set to 5 mm to 10 mm.

[0188] Optionally, the flow path integrated plate further includes a heat exchange plate 2.

[0189] According to a fourth aspect, referring to FIGS. 3 to 19, the embodiments of the present disclosure provide a flow path integrated plate, and the flow path integrated plate includes a flow path plate 24, flow paths 21, where the flow paths 21 are arranged on the flow path plate 24, and in the plane where the flow path integrated plate is located, the area for arranging the flow paths 21 is greater than 70% of the area of the flow path plate 24.

[0190] Specifically, the area ratio for arranging the flow channels 21 in the flow channel plate 24 can be flexibly set according to the heat exchange object of the flow channel integrated plate. For example, when exchanging heat for a heat exchange object such as a battery with high heat exchange requirements, for batteries with different powers and voltages, in order to improve the flexibility of heat exchange of the flow channel integrated plate, the area for arranging the flow channels 21 can be set to 75%, 80%, 85%, 90%, or 95% of the area of the flow channel plate 24.

[0191] Optionally, the width of the flow channel is less than 15 mm.

[0192] Specifically, when the flow channel integrated plate provided by the embodiment of the present disclosure faces different heat exchange requirements at different positions, the heat exchange efficiency of the flow channel integrated plate can be improved through different distribution densities of the flow channels, that is, flow channels 21 with a narrower width can be used for heat exchange. The width of the flow channel 21 may be 3 mm to 12 mm. The width of the flow channel 21 is also the radial size of the flow channel 21. Optionally, in order to increase the distribution density of the flow channels 21, the width of the flow channels 21 can be set to 5 mm to 10 mm.

[0193] Optionally, the flow channel integrated plate further includes a heat exchange plate 2.

[0194] In addition, the flow channels 21 may be engraved on the heat exchange plate 2, and the battery module 1 may include a plurality of cells. The heat exchange plate 2 cools the battery module 1 in the forward direction (the flow direction of the working medium in the flow channels 21) and heats the battery module in the reverse direction (the flow direction of the working medium in the flow channels 21), which can improve the cooling operation and heating operation of the battery module 1, ensure the temperature uniformity of the battery module 1, and improve the heat exchange capacity of the heat exchange plate 2 for the battery module 1.

[0195] The flow path 21 extends from the flow convergence end to the inside of the flow path plate 24. The flow path 21 is branched by the flow bifurcation / flow convergence points to form more stages of the branch portions. These flow paths 21 are then arranged through the direction change points, and in order to achieve heat exchange in each region, the branch portions cover the entire flow path plate 24.

[0196] As shown in FIG. 19, the flow path plate 24 and the base plate 23 are combined to form the heat exchange plate 2. On the flow path plate 24, the flow path 21 can have a groove structure and can have an unsealed upper surface. After the base plate 23 covers the flow path plate 24, the base plate 23 can form an upper surface seal on the flow path 21. In this way, the base plate 23 and the flow path 21 as a whole form the heat exchange plate 2. The first terminal end 221 and the second terminal end 222 can be formed by combining the terminal end components provided on the base plate 23 and the flow path plate 24. The terminal end components are provided with the first terminal end 221 and the second terminal end 222. After the base plate 23 covers the flow path plate 24, the first flow convergence end and the second flow convergence end of the flow path 21 can be connected to the first terminal end 221 and the second terminal end 222.

[0197] According to the design concept of each feature of the heat exchange plate 2 in this solution, this solution can be divided into different sections. The different sections represent the different technical features that this solution focuses on. The flow path 21 is designed based on the technical features that are the focus in order to obtain a more uniform heat exchange solution.

[0198] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art will understand that the above examples are merely for illustration and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments can be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is only subject to the appended claims.

Description of Symbols

[0199] 1 battery core 11 first battery module 12 second battery module 2 heat exchange plate 21 flow path 211 direction change point 2111 first type direction change point 2112 second type direction change point 212 flow bifurcation point 2121 first stage flow bifurcation point 2122 second stage flow bifurcation point 22 inlet and outlet assembly 221 first terminal end 222 second terminal end 26 first type 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 region 271 first partition region 272 second partition region 100 main circulation flow path 200 second circulation flow path 300 third circulation flow path 400 fourth circulation flow path, 201 first heat exchange module 202 second heat exchange module

Claims

1. A heat exchange plate applied to a battery, comprising a first end portion (221), a second end portion (222), and a flow path (21) connecting the first end portion (221) to the second end portion (222). The heat exchange plate (2) is configured to exchange heat for the battery, and the flow path is configured to allow a working medium to flow therethrough. When the heat exchange plate (2) is configured to cool the battery, the working medium flows into the flow path (21) from the first end portion (221) and flows out from the second end portion (222). When the heat exchange plate (2) is configured to heat the battery, the working medium flows into the flow path (21) from the second end portion (222) and flows out from the first end portion (221). Heat exchange plate.

2. When the heat exchange plate (2) is configured to cool the battery, the working medium flows in from the first end portion (221) and preferentially flows through the first type region. When the heat exchange plate (2) is configured to heat the battery, the working medium flows in from the second end portion (222) and preferentially flows through the second type region. The heat exchange plate according to claim 1, wherein the first type region (26) is arranged corresponding to the post region of the battery, and the second type region (27) is arranged corresponding to the non-post region of the battery.

3. The flow path includes a first flow path section connected to the first end portion (221) and a second flow path section connected to the second end portion (222). When the heat exchange plate (2) is configured to cool the battery, the working medium flows in from the first end portion (221), continuously flows through the first flow path section and the second flow path section, and then flows out from the second end portion. In the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region. In the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region. When the heat exchange plate (2) is configured to heat the battery, the working medium flows in from the second end portion (222), continuously passes through the second flow path section and the first flow path section, and then flows out from the first end portion (221). In the second flow path section, the length of the flow path flowing through the first type region is shorter than the length of the flow path flowing through the second type region. In the first flow path section, the length of the flow path flowing through the first type region is longer than the length of the flow path flowing through the second type region. The heat exchange plate according to claim 2.

4. The ratio of the length of the first flow path section to the length of the second flow path section is in the range of 0.5 to 5. The heat exchange plate according to claim 3.

5. The ratio of the width of the second type region to the width of the first type region is in the range of 1 to 8. The heat exchange plate according to any one of claims 1 to 4.

6. The ratio of the width of the first type region to the length of the battery is in the range of 0.1 to 0.4, and the ratio of the width of the second type region to the length of the battery is in the range of 0.1 to 0.

6. The heat exchange plate according to any one of claims 1 to 5.

7. The first end portion (221) and the second end portion (222) are located on the same side portion of the heat exchange plate. The heat exchange plate according to any one of claims 1 to 6.

8. Comprising an inlet and outlet assembly (22), and the first end portion (221) and the second end portion (222) are located at the inlet and outlet assembly (22). The heat exchange plate according to claim 7.

9. Comprising the first type region (26) and the second type region (27), and the flow path is distributed in the first type region (26) and the second type region (27). The first type region (26) comprises a first partition (261) and a second partition (262). The second type region (27) comprises a first partition region (271), and the first partition region (271) is located between the first partition (261) and the second partition (262). When the heat exchange plate (2) is configured to exchange heat for the battery, the working medium circulates at least once in the first partition (261), the first partition region (271), and the second partition (262). The heat exchange plate according to any one of claims 3 to 8, wherein the first type region (26) is arranged corresponding to the post region of the battery, and the second type region (27) is arranged corresponding to the non-post region of the battery.

10. The first type region (26) includes a fourth sub-region (2622), and the second type region (27) includes a second partition region (272). When the heat exchange plate (2) is configured to cool the battery, the working medium flows from the first end portion (221) through the fourth sub-region (2622), the second partition region (272), and the fourth sub-region (2622), and flows into the second end portion (222) from the fourth sub-region (2622). The heat exchange plate according to any one of claims 3 to 8, wherein when the heat exchange plate (2) is configured to heat the battery, the working medium flows from the second end portion (222) through the fourth sub-region (2622), the second partition region (272), and the fourth sub-region (2622), and flows into the first end portion (221) from the fourth sub-region (2622).

11. The first type region (26) includes a fourth sub-region (2622) and a second sub-region (2612). The second type region (27) includes a second partition region (272), and the second partition region (272) is located between the fourth sub-region (2622) and the second sub-region (2612). When the heat exchange plate (2) is configured to cool the battery, the working medium flows from the first end portion (221) into the fourth sub-region (2622), the second partition region (272), and the second sub-region (2612), flows back from the second sub-region (2612) into the second partition region (272) and the fourth sub-region (2622), and then flows into the second end portion (222). When the heat exchange plate (2) is configured to heat the battery, the working medium flows from the second end portion (222) into the fourth sub-region (2622), the second partition region (272), and the second sub-region (2612), flows back from the second sub-region (2612) into the second partition region (272) and the fourth sub-region (2622), and then flows into the first end portion (221). The heat exchange plate according to any one of claims 3 to 8.

12. Comprising a first heat exchange module and a second heat exchange module, both the first heat exchange module and the second heat exchange module comprising the first type region (26) and the second type region (27), The first type region (26) comprises a third sub-region (2621), a first sub-region (2611), a fourth sub-region (2622), and the second sub-region (2612), The second type region (27) comprises a first partition region (271) and a second partition region (272), The first partition region (271) is located between the third sub-region (2621) and the first sub-region (2611), the second partition region (272) is located between the fourth sub-region (2622) and the second sub-region (2612), and the first sub-region (2611) and the fourth sub-region (2622) are arranged adjacent to each other. The heat exchange plate according to any one of claims 3 to 8.

13. In the first heat exchange module, when the heat exchange plate (2) is configured to exchange heat for the battery, the working medium circulates at least once in the flow paths of the third sub-region (2621), the first partition region (271), and the first sub-region (2611). The heat exchange plate according to claim 12.

14. In the second heat exchange module, When the heat exchange plate (2) is configured to cool the battery, the working medium flows into the first heat exchange module from the first terminal portion (221), flows from the first heat exchange module into the fourth sub-region (2622) and the second sub-region (2612), flows from the fourth sub-region (2622) and the second sub-region (2612) into the second partition region (272), and then flows into the second terminal portion (222). When the heat exchange plate (2) is configured to heat the battery, the working medium flows into the second partition region (272) from the second terminal portion (222), flows from the second partition region (272) into the fourth sub-region (2622) and the second sub-region (2612), and then flows into the first terminal portion (221). The heat exchange plate according to claim 12 or 13.

15. The flow path includes a flow branch point (212), the flow branch point includes a first-stage flow branch point (2121), at least one first-stage flow branch point is arranged within the first type region, the first-stage flow branch point is arranged close to the first terminal portion or the second terminal portion, and the flow branch point branches the flow path. The heat exchange plate according to any one of claims 3 to 14.

16. Comprising a first heat exchange module and a second heat exchange module, both the first heat exchange module and the second heat exchange module comprising the first type region (26). The first type region (26) of the first heat exchange module comprises a third sub-region (2621) and a first sub-region (2611), and the first type region (26) of the second heat exchange module comprises a fourth sub-region (2622) and a second sub-region (2612). The first-stage flow branch point is arranged within the third sub-region (2621), the flow branch point further comprises a second-stage flow branch point (2122), and the second-stage flow branch point is located in at least one of the first sub-region (2611), the second sub-region, and the fourth sub-region. The heat exchange plate according to claim 15.

17. It includes a heat exchange area and a battery area, the heat exchange area is arranged around the battery area, the battery area is the battery protruding area of the battery on the heat exchange plate, the flow path includes a first type flow path and a second type flow path, the first type flow path is located within the heat exchange area, and the second type flow path is distributed within the battery area. The heat exchange plate according to any one of claims 3 to 16.

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

19. A battery pack comprising the heat exchange plate (2) according to any one of claims 1 to 18.

20. The heat exchange plate according to any one of claims 1 to 18, or The vehicle comprising the battery pack according to claim 19.

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