Runner plate, heat exchange plate structure, battery box body, battery pack and electric equipment

Abstract

The utility model relates to a runner plate, a heat exchange plate structure, a battery box body, a battery pack and electric equipment, the runner plate is provided with a first runner region and a second runner region which are independent, the first runner region and the second runner region are both provided with runners, the first runner region is suitable for at least partially corresponding to a main body of a battery cell so as to exchange heat with the main body of the battery cell, and the second runner region is suitable for at least partially corresponding to the main body of the battery cell. The second flow channel area is suitable for at least partially corresponding to the tab end of the battery cell so as to exchange heat with the tab end of the battery cell, an inlet and an outlet of the flow channel in the first flow channel area are suitable for being connected with the first connector, and an inlet and an outlet of the flow channel in the second flow channel area are suitable for being connected with the second connector. And the first flow channel region and the second flow channel region can respectively exchange heat with the main body and the tab of the battery cell, so that different heat exchange requirements of the main body and the tab of the battery cell are met. In addition, heat exchange media of the flow channels in the first flow channel area and the second flow channel area are controlled through the corresponding connectors, so that control over the heat exchange media in the first flow channel area and the second flow channel area is not interfered with each other.

Description

Technical Field

[0001] The present disclosure relates to the field of battery technology, and in particular to a flow channel plate, a heat exchange plate structure, a battery box, a battery pack and electrical equipment. Background Art

[0002] The battery pack is a device used to provide energy to electrical equipment. It is the core component of electrical equipment and an important direction for future energy transformation. The battery pack is usually composed of battery cases, thermal management devices, battery cells and other components. In related technologies, in order to solve the problem of thermal dissipation or thermal runaway caused by the battery pack working at too high or too low temperatures, a thermal management device is usually provided in the battery pack to cool down or heat up the battery cell, thereby ensuring that the battery operates within a predetermined temperature range and avoiding the battery cell from being too high or too low in temperature. However, there is a problem of uneven temperatures in different parts of the battery cell, which leads to uneven overall temperature, resulting in uneven heating during charging and discharging, affecting the normal use of the battery pack. Utility Model Content

[0003] The purpose of the present disclosure is to provide a flow channel plate, a heat exchange plate structure, a battery box, a battery pack and an electrical device to solve the technical problems existing in the related art.

[0004] In order to achieve the above-mentioned object, according to a first aspect of the present disclosure, a flow channel plate is provided, wherein the flow channel plate is provided with an independent first flow channel area and a second flow channel area, and the first flow channel area and the second flow channel area are both provided with flow channels;

[0005] The first flow channel area is suitable for at least partially corresponding to the main body of the battery core to exchange heat with the main body of the battery core, and the second flow channel area is suitable for at least partially corresponding to the pole ear end of the battery core to exchange heat with the pole ear end of the battery core;

[0006] The inlet and outlet of the flow channel in the first flow channel area are suitable for connecting to a first joint, and the inlet and outlet of the flow channel in the second flow channel area are suitable for connecting to a second joint.

[0007] Optionally, in a region of the same area, the total area of ​​the flow channels in the second flow channel zone is greater than the total area of ​​the flow channels in the first flow channel zone.

[0008] Optionally, the first flow channel area and the second flow channel area are both provided with a plurality of flow channels;

[0009] The density of the flow channels in the second flow channel area is greater than the density of the flow channels in the first flow channel area.

[0010] Optionally, in the first flow channel region, in a first direction, from the middle of the first flow channel region to both ends of the first flow channel region, the density of the flow channels in the first flow channel region gradually increases.

[0011] Optionally, the first flow channel region includes a plurality of first flow channel segments extending along the first direction, and two adjacent first flow channel segments are spaced apart in the second direction.

[0012] A plurality of the first flow channel segments are connected, and the first direction intersects with the second direction; the second flow channel region includes a plurality of second flow channel segments extending along the first direction, two adjacent second flow channel segments are spaced apart in the second direction, and a plurality of the second flow channel segments are connected;

[0013] Wherein, along the second direction, a distance between two adjacent first flow channel sections is greater than a distance between two adjacent second flow channel sections.

[0014] Optionally, in the first flow channel area, in the first direction, from the middle of the first flow channel area to both ends of the first flow channel area, the distance between two adjacent first flow channel sections gradually decreases.

[0015] Optionally, the number of the first flow channel areas is multiple, and the flow channel plate includes multiple first inlet flow channels and multiple first outlet flow channels;

[0016] Each first flow channel area is suitable for being connected to the first joint through a respective first inlet flow channel and a respective first outlet flow channel.

[0017] Optionally, the first discharge flow channel of one of two adjacent first flow channel areas is arranged adjacent to the first discharge flow channel of the other of the two adjacent first flow channel areas, and is discharged through the same outlet on the flow channel plate.

[0018] Optionally, there are multiple second flow channel areas, and the flow channels of the multiple second flow channel areas are connected in sequence;

[0019] The flow channel plate includes a plurality of second inlet flow channels;

[0020] At least some of the second flow channel areas among the plurality of second flow channel areas are suitable for being connected to the second joint through corresponding second inlet flow channels.

[0021] Optionally, the flow channel plate includes connecting flow channels;

[0022] The connecting flow channel connects two of the second flow channel areas that are located closest to the second joint among the plurality of the second flow channel areas;

[0023] The connecting flow channel is arranged side by side with the second inlet flow channel to exchange heat with the second inlet flow channel.

[0024] Optionally, the number of the second flow channel areas is multiple;

[0025] A plurality of the second flow channel areas are arranged at intervals, and a first flow channel area is provided between two adjacent second flow channel areas.

[0026] Optionally, the number of the second flow channel areas is four, and the number of the first flow channel areas is two;

[0027] The four second flow channel areas are arranged at intervals along the first direction, and one first flow channel area is arranged between two adjacent second flow channel areas.

[0028] Optionally, the flow channel plate is provided with a first inlet, a first outlet, a second inlet and a second outlet;

[0029] The first inlet is connected to the inlet of the flow channel in the first flow channel area, and the first outlet is connected to the outlet of the flow channel in the first flow channel area;

[0030] The second inlet is connected to the inlet of the flow channel in the second flow channel area, and the second outlet is connected to the outlet of the flow channel in the second flow channel area;

[0031] The first inlet and the first outlet are suitable for being connected to the first joint, and the second inlet and the second outlet are suitable for being connected to the second joint.

[0032] Optionally, the first inlet, the first outlet, the second inlet and the second outlet are all located on the same side of the flow channel plate.

[0033] Optionally, the surface of the flow channel plate located at the first flow channel area has a first protrusion, and the interior of the first protrusion is suitable for constructing a flow channel in the first flow channel area; and / or,

[0034] The surface of the flow channel plate located at the second flow channel area has a second protrusion, and the interior of the second protrusion is suitable for constructing a flow channel in the second flow channel area.

[0035] According to a second aspect of the present disclosure, there is provided a heat exchange plate structure, comprising a joint unit and a flow channel plate as described above;

[0036] The flow channels in the first flow channel area and the flow channels in the second flow channel area are connected to the heat exchange pipeline outside the battery pack through the joint unit.

[0037] Optionally, the joint unit further includes a first joint and a second joint;

[0038] The first joint is provided with a first opening and a second opening, and the flow channel plate includes a first inlet flow channel and a first outlet flow channel;

[0039] The first opening is connected to the inlet of the flow channel in the first flow channel area through the first inlet flow channel, and the second opening is connected to the outlet of the flow channel in the first flow channel area through the first outlet flow channel;

[0040] The second joint is provided with a third opening and a fourth opening, and the flow channel plate includes a second inlet flow channel and a connecting flow channel;

[0041] The third opening is connected to the inlet of the flow channel in the second flow channel area through the second inlet flow channel, and the fourth opening is connected to the outlet of the flow channel in the second flow channel area through the connecting flow channel.

[0042] Optionally, the first joint includes a first joint body and a first connecting plate, the first connecting plate is mounted on the flow channel plate, a plurality of connecting channels are formed in the first connecting plate, the first joint body is provided with the first opening and the second opening, the first opening is connected to the first inlet flow channel through the connecting channel in the first connecting plate, and the second opening is connected to the first outlet flow channel through the connecting channel in the first connecting plate; and / or,

[0043] The second joint includes a second joint body and a second connecting plate, the second connecting plate is installed on the flow channel plate, a plurality of connecting channels are formed in the second connecting plate, the second joint body is provided with the third opening and the fourth opening, the third opening is connected to the second inlet flow channel through the connecting channel in the second connecting plate, and the fourth opening is connected to the connecting flow channel through the connecting channel in the second connecting plate.

[0044] Optionally, the heat exchange plate structure further includes a vapor chamber, the vapor chamber is connected to the flow channel plate, and the vapor chamber is suitable for being connected to the battery cell.

[0045] According to a third aspect of the present disclosure, there is provided a battery box, comprising the heat exchange plate structure as described above;

[0046] The heat exchange plate structure is arranged on the inner side of the bottom plate of the battery box, or the heat exchange plate structure is configured as the bottom plate of the battery box, or the heat exchange plate structure is configured as the top cover of the battery box.

[0047] According to a fourth aspect of the present disclosure, there is provided a battery pack, comprising a battery cell and the battery box as described above;

[0048] The battery cell is arranged in a cavity defined by the battery case, the first flow channel area at least partially corresponds to the main body of the battery cell and exchanges heat with the main body of the battery cell, and the second flow channel area at least partially corresponds to the tab end of the battery cell and exchanges heat with the tab end of the battery cell.

[0049] Optionally, the battery pack further includes a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is used to monitor the temperature of the tab end of the battery cell, and the second temperature sensor is used to monitor the temperature of the main body of the battery cell.

[0050] According to a fifth aspect of the present disclosure, there is provided an electric device, comprising:

[0051] The device body and the battery pack as described above;

[0052] Wherein, the battery pack is installed on the device body and is used to supply power to the device body.

[0053] Through the above technical scheme, since the first flow channel area and the second flow channel area are independent of each other, and the first flow channel area at least partially corresponds to the main body of the battery cell, and the second flow channel area at least partially corresponds to the pole tab end of the battery cell, that is to say, the first flow channel area and the second flow channel area can respectively exchange heat with the main body and the pole tab end of the battery cell. In other words, by reasonably designing or adjusting the heat exchange capacity of the first flow channel area and the second flow channel area, the flow channel plate can have different heat exchange capacities for the main body and the pole tab end of the battery cell, thereby meeting the different heat exchange requirements of the main body and the pole tab end of the battery cell, and effectively avoiding the situation where the thermal management device cannot achieve separate control of the heat exchange of the main body and the pole tab end of the battery cell, and the battery cell is prone to uneven temperature, resulting in uneven charging and discharging of the battery cell, affecting the normal use of the battery cell or battery pack.

[0054] In addition, since the inlet and outlet of the flow channel in the first flow channel area are suitable for connection with the first joint, and the inlet and outlet of the flow channel in the second flow channel area are suitable for connection with the second joint, the inflow and outflow of the heat exchange medium in the flow channel in the first flow channel area can be controlled by the first joint, and the inflow and outflow of the heat exchange medium in the flow channel in the second flow channel area can be controlled by the second joint. In other words, the heat exchange medium in the flow channel in the first flow channel area and the second flow channel area can be controlled by their corresponding joints respectively, and the control of the heat exchange medium in the first flow channel area and the second flow channel area does not interfere with each other, which effectively avoids the first flow channel area and the second flow channel area being connected to two joints (i.e., the first joint and the second joint) at the same time. If the first joint and / or the second joint is damaged, the two flow channel areas (i.e., the first flow channel area and the second flow channel area) cannot be used normally.

[0055] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0057] Figure 1 It is a schematic diagram of the three-dimensional structure of a battery pack in a disassembled state provided in an exemplary embodiment of the present disclosure, wherein the main body and the tab end of the battery cell are schematically shown in a dotted frame, and the size and proportion of the main body and the tab end of the battery cell can be adaptively adjusted.

[0058] Figure 2 is a bottom view schematic diagram of a heat exchange plate structure provided by an exemplary embodiment of the present disclosure, wherein a flow channel plate is shown.

[0059] Figure 3 1 is a schematic diagram of a flow channel of a first flow channel region of a flow channel plate provided in an exemplary embodiment of the present disclosure, wherein the first flow channel region is schematically framed by a dotted line frame.

[0060] Figure 4 1 is a schematic diagram of the flow channels of the second flow channel area of ​​the flow channel plate provided in an exemplary embodiment of the present disclosure, wherein the second flow channel area, the connecting flow channels, etc. are schematically framed by dotted lines.

[0061] Figure 5 It is a schematic diagram of the three-dimensional structure of a joint unit of a heat exchange plate structure provided in an exemplary embodiment of the present disclosure.

[0062] Figure 6 Schematic diagram of an exploded view of a heat exchange plate structure provided by an exemplary embodiment of the present disclosure.

[0063] Description of Reference Numerals

[0064] 100-battery pack; 101-battery case; 102-battery cell unit; 1021-battery cell; 21-main body; 22-ear end; 23-battery pack; 103-heat exchange plate structure; 31-flow channel plate; 311-first flow channel area; 3111-first flow channel section; 312-second flow channel area; 3121-second flow channel section; 313-flow channel; 318-first protrusion; 319-second protrusion; 320-first inlet flow channel; 331 -first discharge channel; 332-second inlet channel; 333-connecting channel; 32-joint unit; 321-first joint; 3211-first opening; 3212-second opening; 3213-first joint body; 3214-first connecting plate; 322-second joint; 3221-third opening; 3222-fourth opening; 3223-second joint body; 3224-second connecting plate; 33-heat spreader; 34-thermal conductive adhesive. DETAILED DESCRIPTION

[0065] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0066] In the present disclosure, it should be understood that the directional words used, such as "upper" and "lower", are usually defined in terms of the drawing direction of the corresponding drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, specific orientation structure and operation, and therefore cannot be understood as limiting the present disclosure. The terms "inside" and "outside" refer to the inside and outside of the corresponding structural contour. "First direction" and "second direction" can be referred to in Figure 2 In addition, it should be noted that the terms such as "first", "second", etc. are used to distinguish one element from another element and do not have order and importance. In addition, in the description with reference to the drawings, the same mark in different drawings represents the same element.

[0067] In the description of the present disclosure, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "connected", and "installed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0068] As customers' requirements for charging time become shorter and shorter, the battery pack charging rate becomes higher and higher, the charging current becomes higher and higher, and the heat generated by the battery cell becomes larger and larger. The battery cell does not generate heat evenly when charging and discharging. The applicant's research found that the heat generated at the battery cell's tab end is higher than the heat generated in the middle of the battery cell, and the greater the current, the greater the difference in heat generation. This uneven heating of the battery cell makes the battery cell's tab end and the battery cell's middle have different requirements for the heat exchange capacity of the heat exchange plate. The battery cell tab end area requires a high heat exchange capacity of the cold plate, and the battery cell middle area requires a low heat exchange capacity of the cold plate. However, in the related art, the thermal management device in the battery pack cannot exchange heat for the main body of the battery cell and the tab end of the battery cell separately, and the battery cell is prone to uneven temperature.

[0069] In view of this, if Figures 1 to 6 As shown, according to the first aspect of the present disclosure, a flow channel plate 31 is provided, and the flow channel plate 31 is provided with an independent first flow channel area 311 and a second flow channel area 312, and the first flow channel area 311 and the second flow channel area 312 are both provided with a flow channel 313, the first flow channel area 311 is suitable for at least partially corresponding to the main body 21 of the battery cell 1021, so as to exchange heat with the main body 21 of the battery cell 1021, and the second flow channel area 312 is suitable for at least partially corresponding to the pole ear end 22 of the battery cell 1021, so as to exchange heat with the pole ear end 22 of the battery cell 1021, wherein the inlet and outlet of the flow channel 313 in the first flow channel area 311 are suitable for being connected to the first joint 321, and the inlet and outlet of the flow channel 313 in the second flow channel area 312 are suitable for being connected to the second joint 322.

[0070] First, it should be noted that the present disclosure does not limit the specific heat exchange type of the flow channel plate 31 . The flow channel plate 31 can be used to dissipate heat and cool the battery cell 1021 , and can also be used to heat and increase the temperature of the battery cell 1021 .

[0071] The present disclosure does not limit the number of the battery cells 1021, which can be any suitable number. When the number of the battery cells 1021 is multiple, the multiple battery cells 1021 can be constructed as follows: Figure 1 The battery cell 102. Figure 1 ,exist Figure 1 In the battery pack 100 shown, the battery cell unit 102 may include a plurality of battery groups 23 , and the plurality of battery groups 23 may respectively consist of a plurality of battery cells 1021 . The flow channel plate 31 may be attached to the plurality of battery cells 1021 , thereby achieving heat exchange with the battery cells 1021 .

[0072] When the above-mentioned flow channel plate 31 is used for heat exchange of the battery pack 100, since the first flow channel area 311 and the second flow channel area 312 are both provided with the flow channel 313, by fitting the flow channel plate 31 to the battery cell 1021 and passing the heat exchange medium into the flow channel 313, the heat exchange medium can exchange heat with the main body 21 of the battery cell 1021 and the pole ear end 22 of the battery cell 1021 during the process of flowing through the flow channel 313 of the first flow channel area 311 and the second flow channel area 312, thereby achieving heat exchange with the battery cell 1021.

[0073] Here, it should be noted that the tab end 22 of the above-mentioned battery cell 1021 may be the area where the tab of the battery cell 1021 corresponds to the battery cell 1021, or the tab end 22 of the battery cell 1021 may be the area where the tab of the battery cell 1021 corresponds to the battery cell 1021 and the metal conductor used to lead the positive and negative electrodes from the battery cell 1021, and the tab end 22 may be located on both sides or one side of the battery cell 1021. The main body 21 of the battery cell 1021 may refer to the part of the battery cell 1021 excluding the area corresponding to the tab end 22. For example, for a battery cell 1021 having tab ends 22 on both sides, the main body 21 of the battery cell 1021 may refer to the part located between the tab ends 22 at both ends of the battery cell 1021. In addition, in the present disclosure, the battery cell unit 102 may include a single or multiple battery packs 23, such as Figure 1 As shown, the battery cell unit 102 may include four battery packs 23 , and each battery pack 23 may include any appropriate number of battery cells 1021 .

[0074] Through the above technical solution, since the first flow channel area 311 and the second flow channel area 312 are independent of each other, and the first flow channel area 311 corresponds to the main body 21 of the battery cell 1021 at least partially, and the second flow channel area 312 corresponds to the pole ear end 22 of the battery cell 1021 at least partially, that is, the first flow channel area 311 and the second flow channel area 312 can respectively exchange heat with the main body 21 and the pole ear end 22 of the battery cell 1021. In other words, by reasonably designing or adjusting the exchange of the first flow channel area 311 and the second flow channel area 312 The thermal capacity enables the flow channel plate 31 to have different heat exchange capacities for the main body 21 and the tab end 22 of the battery cell 1021, thereby meeting the different heat exchange requirements of the main body 21 and the tab end 22 of the battery cell 1021, and effectively avoiding the situation where the thermal management device cannot achieve separate control of the heat exchange of the main body 21 and the tab end 22 of the battery cell 1021, and the battery cell 1021 is prone to temperature unevenness, resulting in uneven charging and discharging of the battery cell 1021, affecting the normal use of the battery cell 1021 or the battery pack 100.

[0075] In addition, since the inlet and outlet of the flow channel 313 in the first flow channel area 311 are suitable for connection with the first joint 321, and the inlet and outlet of the flow channel 313 in the second flow channel area 312 are suitable for connection with the second joint 322, the inflow and outflow of the heat exchange medium in the flow channel 313 in the first flow channel area 311 can be controlled by the first joint 321, and the inflow and outflow of the heat exchange medium in the flow channel 313 in the second flow channel area 312 can be controlled by the second joint 322. In other words, the heat exchange medium of the flow channels 313 in the first flow channel area 311 and the second flow channel area 312 can be controlled respectively through their corresponding joints, and the control of the heat exchange medium in the first flow channel area 311 and the second flow channel area 312 does not interfere with each other, which effectively avoids the first flow channel area 311 and the second flow channel area 312 being connected to two joints (i.e., the first joint 321 and the second joint 322) at the same time. If the first joint 321 and / or the second joint 322 is damaged, the two flow channel 313 areas (i.e., the first flow channel area 311 and the second flow channel area 312) cannot be used normally.

[0076] For example, when the battery cell 1021 in the battery pack 100 needs to dissipate heat, since the heat generated at the tab end 22 of the battery cell 1021 is greater than the heat generated at the main body 21 of the battery cell 1021, the heat exchange demand at the tab end 22 of the battery cell 1021 is greater than the heat exchange demand at the main body 21 of the battery cell 1021. At this time, the second flow channel area 312 can have a stronger heat exchange capacity (such as the second flow channel area 312 has more flow channels 313, or the flow channels 313 in the second flow channel area 312 are filled with a heat exchange medium with higher heat exchange capacity, etc.), so that the temperatures of the main body 21 and the tab end 22 of the battery cell 1021 after heat dissipation through the first flow channel area 311 and the second flow channel area 312 respectively are similar, and there will be no large temperature difference between the main body 21 and the tab end 22 of the battery cell 1021.

[0077] The present disclosure does not limit the specific method of how to make the first flow channel area 311 and the second flow channel area 312 have different heat exchange capabilities. As an exemplary embodiment of the present disclosure, Figures 2 to 4 As shown, in a region of the same area, the total area of ​​the flow channels 313 in the second flow channel region 312 is greater than the total area of ​​the flow channels 313 in the first flow channel region 311 .

[0078] Here, it should be noted that the total area of ​​the flow channels 313 in the second flow channel zone 312 can be greater than the total area of ​​the flow channels 313 in the first flow channel zone 311, which means that the sum of the areas of the inner walls of all the flow channels 313 in the second flow channel zone 312 is greater than the sum of the areas of the inner walls of all the flow channels 313 in the first flow channel zone 311.

[0079] In an area of ​​the same area, the flow channel 313 area with a larger flow channel 313 has a larger heat exchange area. In other words, the heat exchange capacity of the second flow channel area 312 with a larger flow channel 313 area is greater than the heat exchange capacity of the first flow channel area 311, and the heat exchange capacity of the second flow channel area 312 matches the higher heat exchange demand of the pole tab end 22 of the battery cell 1021. After heat exchange through the first flow channel area 311 and the second flow channel area 312 respectively, the temperatures of the main body 21 and the pole tab end 22 of the battery cell 1021 are similar, and there will be no large temperature difference between the main body 21 and the pole tab end 22 of the battery cell 1021, which effectively avoids the situation where the temperature difference of the battery cell 1021 is too large, resulting in uneven charging and discharging of the battery cell 1021, and affecting the normal use of the battery cell 1021.

[0080] Alternatively, if Figures 2 to 4 As shown, the first flow channel area 311 and the second flow channel area 312 are both provided with a plurality of flow channels 313, and the density of the flow channels 313 in the second flow channel area 312 is greater than the density of the flow channels 313 in the first flow channel area 311. That is, in the same area, the second flow channel area 312 has more flow channels 313. The second flow channel area 312 with a larger density has a stronger heat exchange capacity, so that the flow channel plate 31 has different heat exchange capacities for the main body 21 and the pole tab end 22 of the battery cell 1021. The heat exchange capacity of the second flow channel area 312 matches the higher heat exchange demand of the pole tab end 22 of the battery cell 1021. The temperatures of the main body 21 and the pole tab end 22 of the battery cell 1021 after heat exchange through the first flow channel area 311 and the second flow channel area 312 are similar, and there will be no large temperature difference between the main body 21 and the pole tab end 22 of the battery cell 1021, which effectively avoids the situation where the temperature difference of the battery cell 1021 is too large, the battery cell 1021 is unevenly charged and discharged, and the normal use of the battery cell 1021 is affected.

[0081] In addition, since the density of the flow channels 313 in the second flow channel area 312 is higher, even if there are more flow channels 313 in the second flow channel area 312, the second flow channel area 312 will not occupy too large an area on the flow channel plate 31, thereby increasing the overall size of the flow channel plate 31 and making the flow channel plate 31 more compact.

[0082] It can be understood that, in addition to making the density of the flow channels 313 in the second flow channel zone 312 greater than the density of the flow channels 313 in the second flow channel zone 312 within the same area, so as to achieve that the area of ​​the flow channels 313 in the second flow channel zone 312 is larger than that of the flow channels 313 in the first flow channel zone 311, in other embodiments of the present disclosure, the second flow channel zone 312 can have a flow channel 313 with a larger cross-sectional area, so as to achieve that the area of ​​the flow channels 313 in the second flow channel zone 312 is larger than that of the flow channels 313 in the first flow channel zone 311.

[0083] As described above, the heat exchange demand of the tab end 22 of the battery cell 1021 is greater than the heat exchange demand of the main body 21 of the battery cell 1021. In order to further avoid the situation where the main body 21 and the tab end 22 of the battery cell 1021 are prone to uneven temperatures, as an exemplary embodiment of the present disclosure, Figure 2 and Figure 4 As shown, in the first flow channel area 311, in the first direction (such as the length direction of the battery cell 1021), the density of the flow channels 313 in the first flow channel area 311 gradually increases from the middle of the first flow channel area 311 to the two ends of the first flow channel area 311. When the flow channel plate 31 is assembled to the battery pack 100, the density of the flow channels 313 in the first flow channel area 311 can be gradually increased from the middle of the main body 21 of the battery cell in the battery cell unit 102 to the direction of the tab end 22 of the battery cell, that is, from the middle of the battery cell to the end of the battery cell. In this way, within the first flow channel area 311, the closer to the pole lug end 22 of the battery cell 1021, the denser the flow channel 313, and the stronger the heat exchange capacity of the first flow channel area 311. In this way, the first flow channel area 311 close to the pole lug end 22 of the battery cell 1021 can also play an auxiliary heat exchange role for the pole lug end 22 of the battery cell 1021, further improving the heat exchange capacity of the flow channel plate 31 at the pole lug end 22 of the battery cell 1021 with higher heat exchange requirements, helping to further reduce the temperature difference between the main body 21 of the battery cell 1021 and the pole lug end 22 of the battery cell 1021, thereby reducing the temperature difference of the entire battery cell 1021.

[0084] The present disclosure does not limit the specific arrangement of the flow channels 313 in the first flow channel area 311 and the second flow channel area 312, as long as the flow channels 313 in the first flow channel area 311 and the second flow channel area 312 can meet the heat exchange requirements of the first flow channel area 311 and the second flow channel area 312. As an exemplary embodiment of the present disclosure, Figures 2 to 4As shown, the first flow channel area 311 includes a plurality of first flow channel segments 3111 extending along the first direction, two adjacent first flow channel segments 3111 are arranged at intervals in the second direction, the plurality of first flow channel segments 3111 are connected, and the first direction intersects with the second direction; the second flow channel area 312 includes a plurality of second flow channel segments 3121 extending along the first direction, two adjacent second flow channel segments 3121 are spaced apart in the second direction, the plurality of second flow channel segments 3121 are connected, wherein, along the second direction, the spacing between two adjacent first flow channel segments 3111 is greater than the spacing between two adjacent second flow channel segments 3121.

[0085] Multiple second flow channel sections 3121 with smaller spacing make the density of the second flow channel sections 3121 higher. Compared with the first flow channel area 311, the second flow channel area 312 has a stronger heat exchange capacity, thereby meeting the different heat exchange requirements of the main body 21 and the pole ear end 22 of the battery cell 1021 and reducing the temperature difference of the entire battery cell 1021.

[0086] Alternatively, if Figure 2 and Figure 4 As shown, in the first flow channel area 311, in the first direction, the distance between two adjacent first flow channel sections 3111 gradually decreases from the middle of the first flow channel area 311 to the two ends of the first flow channel area 311. When the flow channel plate 31 is assembled to the battery pack 100, the density of the flow channel 313 in the first flow channel area 311 can be gradually increased from the middle of the main body 21 of the battery cell in the battery cell unit 102 to the direction of the tab end 22 of the battery cell, that is, from the middle of the battery cell to the end of the battery cell. In this way, within the first flow channel area 311, the closer to the pole lug end 22 of the battery cell 1021, the denser the flow channel 313 is, and the stronger the heat exchange capacity of the first flow channel area 311 is. In this way, the first flow channel area 311 close to the pole lug end 22 of the battery cell 1021 can also play an auxiliary heat exchange role for the pole lug end 22 of the battery cell 1021, further improving the heat exchange capacity of the flow channel plate 31 at the pole lug end 22 of the battery cell 1021 with higher heat exchange requirements, helping to further reduce the temperature difference between the main body 21 of the battery cell 1021 and the pole lug end 22 of the battery cell 1021, thereby reducing the temperature difference of the entire battery cell 1021.

[0087] For the battery cell unit 102 , it is also helpful to further reduce the temperature difference between the main body of the battery cell 1021 and the tab end 22 of the battery cell 1021 in the battery cell unit 102 , thereby reducing the temperature difference of the entire battery cell unit 102 .

[0088] For the battery pack 100, in order to achieve heat exchange of the multiple battery cells 1021 in the battery pack 100, optionally, as Figure 2 and Figure 3As shown, there are multiple first flow channel areas 311, and the flow channel plate 31 includes multiple first inlet flow channels 320 and multiple first outlet flow channels 331. Each first flow channel area 311 is suitable for connecting to the first joint 321 through its own first inlet flow channel 320 and its own first outlet flow channel 331. In this way, the multiple first flow channel areas 311 can exchange heat with the main bodies 21 of the multiple battery cells 1021, respectively, so as to achieve heat exchange of the main bodies 21 of the battery cells 1021 in the entire battery pack 100.

[0089] In addition, for an embodiment in which the battery cell unit 102 in the battery pack 100 includes multiple battery groups 23, the multiple first flow channel areas 311 can respectively exchange heat with the main bodies 21 of the battery cells 1021 of the multiple battery groups 23, thereby achieving heat exchange of the main bodies 21 of the battery cells 1021 in the entire battery pack 100.

[0090] Alternatively, if Figure 3 As shown, the first discharge flow channel 331 of one of the two adjacent first flow channel areas 311 is arranged adjacent to the first discharge flow channel 331 of the other of the two adjacent first flow channel areas 311, and is discharged through the same outlet on the flow channel plate 31. In this way, the heat exchange medium flowing into the first inlet flow channel 320 and the heat exchange medium flowing out of the first discharge flow channel 313 can also achieve heat exchange, so that the heat exchange medium flowing into or out of the flow channel plate 31 through the first joint 321 will not be overcooled or overheated, reducing the temperature difference between the heat exchange medium flowing into and out of the flow channel plate 31, effectively avoiding the situation where the temperature difference between the heat exchange medium flowing into and out of the flow channel plate 31 is large, which is easy to damage other equipment (such as air compressor, etc.) connected to the flow channel plate 31.

[0091] Alternatively, if Figure 2 and Figure 4 As shown, there are multiple second flow channel areas 312, and the flow channels 313 of the multiple second flow channel areas 312 are connected in sequence. The flow channel plate 31 includes multiple second inlet flow channels 332, and at least some of the multiple second flow channel areas 312 are suitable for being connected to the second connector 322 through the corresponding second inlet flow channels 332. In this way, for the embodiment in which the battery pack 100 includes multiple battery cells 1021, the multiple second flow channel areas 312 can exchange heat with the tab ends 22 of the multiple battery cells 1021 respectively, and the first flow channel area 311 arranged between two adjacent second flow channel areas 312 can exchange heat with the main body 21 of the battery cell 1021.

[0092] Moreover, when there is only one battery group 23 in the battery pack 100, the number of the second flow channel areas 312 can be two, and the number of the first flow channel areas 311 can be one. The two second flow channel areas 312 can respectively exchange heat with the pole ear ends 22 on both sides of the battery cell 1021, and the first flow channel area 311 can exchange heat with the main body 21 of the battery cell 1021 located between the pole ear ends 22 on both sides of the battery cell 1021.

[0093] In order to avoid a large temperature difference between the heat exchange medium flowing into the second inlet flow channel 332 and the heat exchange medium flowing out of the connecting flow channel 333, optionally, as Figure 4 As shown, the flow channel plate 31 may further include a connecting flow channel 333, and the connecting flow channel 333 connects two second flow channel areas 312 located closest to the second joint 322 among the plurality of second flow channel areas 312, such as Figure 4 In the two second flow channel areas 312 located on the leftmost side of the drawing, the connecting flow channel 333 is arranged side by side with the second inlet flow channel 332 to exchange heat with the second inlet flow channel 332. In this way, the heat exchange medium flowing into the second inlet flow channel 332 and the heat exchange medium flowing out of the connecting flow channel 333 can also achieve heat exchange, so that the heat exchange medium flowing into or out of the flow channel plate 31 through the second joint 322 will not be overcooled or overheated, reducing the temperature difference between the heat exchange medium flowing into and out of the flow channel plate 31, effectively avoiding the situation where the temperature difference between the heat exchange medium flowing into and out of the flow channel plate 31 is large, which is easy to damage other equipment (such as air compressor, etc.) connected to the flow channel plate 31.

[0094] For the battery pack 100, in order to achieve heat exchange of multiple battery cells 1021 in the entire battery pack 100, optionally, as Figure 2 and Figure 4 As shown, there are multiple second flow channel areas 312 , the multiple second flow channel areas 312 are arranged at intervals, and a first flow channel area 311 is provided between two adjacent second flow channel areas 312 .

[0095] In this way, for an embodiment in which the battery cell unit 102 in the battery pack 100 includes multiple battery groups 23, the multiple second flow channel regions 312 can respectively exchange heat with the tab ends 22 of the battery cells 1021 of the multiple battery groups 23, and the first flow channel region 311 arranged between two adjacent second flow channel regions 312 can exchange heat with the main body 21 of the battery cell 1021 of the battery group 23.

[0096] In addition, when there is only one battery group 23 in the battery pack 100, the number of the second flow channel areas 312 can be two, and the number of the first flow channel areas 311 can be one. The two second flow channel areas 312 can respectively exchange heat with the pole tab ends 22 of the battery cells on both sides of the battery group 23, and the first flow channel area 311 can exchange heat with the main body 21 of the battery cell 1021 located between the pole tab ends 22 on both sides of the battery group 23.

[0097] For an embodiment in which the battery cell unit 102 includes four battery packs 23, and the four battery packs 23 are spaced apart along the first direction and the second direction, in order to achieve heat dissipation of the battery cell unit 102, optionally, as Figure 2 and Figure 4 As shown, the number of the second flow channel areas 312 is four, the number of the first flow channel areas 311 is two, the four second flow channel areas 312 are arranged at intervals along the first direction, and a first flow channel area 311 is arranged between two adjacent second flow channel areas 312. The first flow channel area 311 and the second flow channel area 312 are respectively arranged corresponding to the main body 21 of the battery cell 1021 of the four battery packs 23 and the pole tab end 22 of the battery cell 1021, so as to meet the different heat exchange requirements of the main body 21 and the pole tab end 22 of the battery cell 1021 in the battery cell unit 102.

[0098] For example, Figures 2 to 4 As shown, the number of the second flow channel areas 312 is four, and the four second flow channel areas 312 are arranged at intervals along the first direction. The four second flow channel areas 312 can cover the pole tab ends 22 of all the battery cells 1021 of the four battery groups 23, and the pole tab ends 22 of all the battery cells 1021 of the four battery groups 23 can exchange heat with the four second flow channel areas 312. The four second flow channel areas 312 can realize the cooling of the pole tab ends 22 of all the battery cells on the above-mentioned four battery groups 23. Since the second flow channel areas 312 can have a higher heat exchange capacity, for the heat dissipation of the battery cell unit 102, the pole tab ends 22 of all the battery cells 1021 of the battery group 23 will have more heat taken away by the second flow channel areas 312, thereby suppressing the high temperature at the pole tab ends 22 of the battery cells 1021, thereby reducing the overall temperature difference of the battery cell unit 102. There are two first flow channel areas 311 , which are also spaced apart along the length direction of the battery cell unit 102 . The two first flow channel areas 311 can cover the main bodies 21 of all the battery cells 1021 of the four battery packs 23 , thereby cooling the main bodies 21 of all the battery cells 1021 on the above four battery packs 23 .

[0099] Specifically, when the flow channel plate 31 is used to exchange heat for the battery cells 1021, the two first flow channel areas 311 can respectively cover the main bodies 21 of all the battery cells 1021 of the four battery packs 23, and the two first flow channel areas 311 can exchange heat with the main bodies 21 of the battery cells 1021 of the four battery packs 23, thereby achieving heat dissipation of the main bodies 21 of all the battery cells 1021 on the above-mentioned four battery packs 23. In addition, the four second flow channel areas 312 can respectively cover the ear ends 22 of all the battery cells 1021 of the four battery packs 23, and all the battery cells 1021 of the four battery packs 23 can be heated. 1 can exchange heat with the four second flow channel areas 312, and the four second flow channel areas 312 can realize the cooling of the pole ear ends 22 of all the battery cells 1021 on the above four battery groups 23. Since the second flow channel area 312 can have a higher heat exchange capacity, for the heat dissipation of the battery cells 1021, the pole ear ends 22 of all the battery cells 1021 of the four battery groups 23 will be taken away more heat by the second flow channel area 312, thereby suppressing the high temperature at the pole ear ends 22 of the battery cells 1021, thereby reducing the overall temperature difference of the battery cells 1021. The number of the first flow channel areas 311 is two, and the two first flow channel areas 311 are also arranged at intervals along the length direction of the battery cell unit 102. The two first flow channel areas 311 can cover the main bodies 21 of all the battery cells 1021 of the four battery groups 23, thereby realizing the cooling of the main bodies 21 of all the battery cells 1021 on the above four battery groups 23.

[0100] At the same time, in the two first flow channel areas 311 used for heat exchange of the main body 21 of the battery cell 1021, since the two first flow channel areas 311 both realize the control of the heat exchange medium through the first inlet flow channel 320 and the first outlet flow channel 331 corresponding to them, and the two first inlet flow channels 320 and the two first outlet flow channels 331 in the two first flow channel areas 311 are arranged side by side at the first joint 321, the heat exchange medium flowing through the two first flow channel areas 311 can also exchange heat at the two first inlet flow channels 320 and the two first outlet flow channels 331 side by side, so that the two first flow channel areas 311 can also realize heat exchange, which is beneficial for the two first flow channel areas 311 to have the same heat exchange temperature, further reducing the overall temperature difference of the battery cell 1021.

[0101] Furthermore, among the four second flow channel regions 312 for heat exchange with the tab end 22 of the battery cell 1021, at least two second flow channel regions 312 (such as those located at Figure 4The two second flow channel areas 312 on the right side of the figure have their own second inlet flow channels 332, and the four second flow channel areas 312 are connected in series with each other. In other words, the four second flow channel areas 312 are connected in series and at least two of the four second flow channel areas 312 are connected in parallel. In this way, the four second flow channel areas 312 are arranged in series and in parallel. Compared with the solution in which multiple second flow channel areas 312 are individually connected in series or in parallel, the heat exchange effect between the four second flow channel areas 312 can be improved, which is beneficial for the four second flow channel areas 312 to have similar heat exchange temperatures and reduce the overall temperature difference of the battery cell unit 102.

[0102] In addition, since a connecting flow channel 333 is also provided on the flow channel plate 31, the connecting flow channel 333 connects two second flow channel areas 312 located closest to the second joint 322 among the multiple second flow channel areas 312, and the connecting flow channel 333 is arranged side by side with the second inlet flow channel 332. In other words, the connecting flow channel 333 is located downstream of the entire second flow channel area 312, and the connecting flow channel 333 located downstream of the second flow channel area 312 can also exchange heat with the second inlet flow channel 332 located upstream of the second flow channel area 312, further enabling the above-mentioned four second flow channel areas 312 to have similar heat exchange temperatures, thereby further reducing the overall temperature difference of the battery cell unit 102.

[0103] In order to facilitate connecting the flow channel 313 in the first flow channel area 311 and the second flow channel area 312 on the flow channel plate 31 with the heat exchange pipeline outside the battery pack 100, optionally, as Figures 2 to 4 As shown, the flow channel plate 31 is provided with a first inlet, a second inlet and a second outlet. The first inlet is connected to the inlet of the flow channel 313 in the first flow channel area 311, and is connected to the outlet of the flow channel 313 in the first flow channel area 311. The second inlet is connected to the inlet of the flow channel 313 in the second flow channel area 312, and the second outlet is connected to the outlet of the flow channel 313 in the second flow channel area 312. The first inlet and the first outlet are suitable for being connected to the first joint 321, and the second inlet and the second outlet are suitable for being connected to the second joint 322.

[0104] The flow channel 313 in the first flow channel area 311 on the flow channel plate 31 can be connected to the heat exchange pipeline outside the battery pack 100 through the first inlet, and the flow channel 313 in the second flow channel area 312 can be connected to the heat exchange pipeline outside the battery pack 100 through the second inlet and the second outlet, thereby realizing the control of the heat exchange medium in the flow channel 313 in the first flow channel area 311 and the flow channel 313 in the second flow channel area 312.

[0105] In addition, since the first flow channel area 311 and the second flow channel area 312 respectively control the heat exchange medium through the first joint 321 and the second joint 322, when the battery cell 1021 needs to dissipate heat, if the temperature of the main body 21 of the battery cell 1021 is lower than the cooling threshold, and the temperature of the pole ear end 22 of the battery cell 1021 is higher than the cooling threshold, at this time, the first joint 321 can be closed and the second joint 322 can be opened, so that the heat exchange medium does not flow to the flow channel 313 in the first flow channel area 311, and the heat exchange medium only flows to the flow channel 313 in the second flow channel area 312. The second flow channel area 312 on the heat exchange plate exchanges heat with the pole ear end 22 of the battery cell 1021, and the first flow channel area 311 on the heat exchange plate does not exchange heat with the main body 21 of the battery cell 1021. In this way, energy consumption can be saved while reducing the temperature difference of the battery cell 1021.

[0106] The present disclosure does not limit the positions of the first inlet, the first outlet, the second inlet and the second outlet on the flow channel plate 31. As an embodiment of the present disclosure, Figure 2 As shown, the first inlet, the first outlet, the second inlet and the second outlet are all located on the same side of the flow channel plate 31. The first inlet, the first outlet, the second inlet and the second outlet located on the same side are conveniently connected to the heat exchange pipeline outside the battery pack 100.

[0107] The present disclosure does not limit the specific formation method of the flow channels 313 in the first flow channel area 311 and the second flow channel area 312 on the flow channel plate 31. As an embodiment of the present disclosure, Figure 2 and Figure 3 As shown, the surface of the flow channel plate 31 located at the first flow channel area 311 has a first protrusion 318 , and the interior of the first protrusion 318 is suitable for constructing the flow channel 313 in the first flow channel area 311 .

[0108] The present disclosure does not limit the specific formation method of the flow channel 313 in the second flow channel area 312 on the flow channel plate 31. As an embodiment of the present disclosure, Figure 2 and Figure 4 As shown, the surface of the flow channel plate 31 located at the second flow channel area 312 has a second protrusion 319 , and the interior of the second protrusion 319 is suitable for constructing the flow channel 313 in the second flow channel area 312 .

[0109] Optionally, the surface of the flow channel plate 31 is further formed with a third protrusion and a fourth protrusion, the interior of the third protrusion and the fourth protrusion are suitable for constructing the connecting flow channel 333, the first inlet flow channel 320, the first outlet flow channel 331 and the second inlet flow channel 332 as described above.

[0110] In order to facilitate the connection between the second flow channel area 312 and the second joint 322, optionally, a second discharge flow channel is also formed on the above-mentioned second flow channel area, and the second discharge flow channel is located in the second flow channel area 312 closest to the second joint 322, and the second discharge flow channel is connected to the second joint 322.

[0111] The present disclosure does not limit the specific structure of the second discharge flow channel on the flow channel plate 31. As an embodiment of the present disclosure, the second discharge flow channel can be a part of the second flow channel area 312 close to the second joint 322, and the second flow channel area 312 is connected to the second joint 322 through the second discharge flow channel.

[0112] As another embodiment of the present disclosure, the second discharge flow channel may also be a part of the flow channel 313 in the second flow channel area 312 .

[0113] Optionally, a fifth protrusion is further formed on the surface of the flow channel plate 31 , and the interior of the fifth protrusion is suitable for constructing the second discharge flow channel as described above.

[0114] According to the second aspect of the present disclosure, a heat exchange plate structure 103 is provided, including a joint unit 32 and a flow channel plate 31 as described above, wherein the flow channel 313 in the first flow channel area 311 and the flow channel 313 in the second flow channel area 312 are connected to the heat exchange pipeline outside the battery pack 100 through the joint unit 32. One end of the joint unit 32 is connected to the heat exchange management outside the battery pack 100, and the other end of the joint unit 32 is connected to the flow channel 313 in the first flow channel area 311 or the second flow channel area 312. The joint unit 32 can play a connecting role, thereby facilitating the connection of the flow channel 313 in the first flow channel area 311 and the flow channel 313 in the second flow channel area 312 to the heat exchange pipeline outside the battery pack 100.

[0115] Alternatively, if Figure 2 and Figure 5 As shown, the joint unit 32 also includes a first joint 321 and a second joint 322, the first joint 321 is provided with a first opening 3211 and a second opening 3212, the flow channel plate 31 includes a first inlet flow channel 320 and a first outlet flow channel 331, the first opening 3211 is connected to the inlet of the flow channel 313 in the first flow channel area 311 through the first inlet flow channel 320, the second opening 3212 is connected to the outlet of the flow channel 313 in the first flow channel area 311 through the first outlet flow channel 331, the second joint 322 is provided with a third opening 3221 and a fourth opening 3222, the flow channel plate 31 includes a second inlet flow channel 332 and a connecting flow channel 333, the third opening 3221 is connected to the inlet of the flow channel 313 in the second flow channel area 312 through the second inlet flow channel 332, and the fourth opening 3222 is connected to the outlet of the flow channel 313 in the second flow channel area 312 through the connecting flow channel 333.

[0116] In other words, the heat exchange medium in the flow channel 313 in the first flow channel area 311 and the second flow channel area 312 is controlled by the first joint 321 and the second joint 322 respectively, the inlet and outlet of the flow channel 313 in the first flow channel area 311 are adjacent, and the inlet and outlet of the flow channel 313 in the second flow channel area 312 are adjacent, so that the heat exchange medium flowing into the flow channel 313 of the first flow channel area 311 and the heat exchange medium flowing out of the flow channel 313 of the first flow channel area 311 can achieve heat exchange at the first joint 321, and the heat exchange medium flowing into the second flow channel area 312 can achieve heat exchange at the first joint 321. The heat exchange medium in the flow channel 313 of 312 and the heat exchange medium in the flow channel 313 flowing out of the second flow channel area 312 can achieve heat exchange at the second joint 322, so that the heat exchange medium flowing into or out of the flow channel plate 31 through the joint unit 32 will not be overcooled or overheated, and the temperature difference between the heat exchange medium flowing into and out of the flow channel plate 31 is reduced, effectively avoiding the situation where the temperature difference between the heat exchange medium flowing into and out of the flow channel plate 31 is large, which is easy to damage other equipment connected to the flow channel plate 31 (such as an air compressor, etc.).

[0117] The present disclosure does not limit the specific structure of the first connector 321. As an exemplary embodiment of the present disclosure, Figure 5 As shown, the first joint 321 includes a first joint body 3213 and a first connecting plate 3214. The first connecting plate 3214 is installed on the flow channel plate 31. A plurality of connecting channels are formed in the first connecting plate 3214. The first joint body 3213 is provided with a first opening 3211 and a second opening 3212. The first opening 3211 is connected to the first inlet flow channel 320 through the connecting channel in the first connecting plate 3214. The second opening 3212 is connected to the first outlet flow channel 331 through the connecting channel in the first connecting plate 3214. The first connecting plate 3214 with a plurality of connecting channels can play a role in diverting the heat exchange medium flowing into the first flow channel area 311. The plurality of flow channels 313 in the first flow channel area 311 do not need to use a plurality of joint units 32. They can be connected to the heat exchange pipeline outside the battery pack 100 only through the first connecting plate 3214, which is conducive to simplifying the overall structure of the heat exchange plate.

[0118] The present disclosure does not limit the specific structure of the second connector 322. As an exemplary embodiment of the present disclosure, Figure 5 As shown, the second joint 322 includes a second joint body 3223 and a second connecting plate 3224. The second connecting plate 3224 is installed on the flow channel plate 31. A plurality of connecting channels are formed in the second connecting plate 3224. A third opening 3221 and a fourth opening 3222 are provided on the second joint body 3223. The third opening 3221 is connected to the second inlet flow channel 332 through the connecting channel in the second connecting plate 3224. The fourth opening 3222 is connected to the connecting flow channel 333 through the connecting channel in the second connecting plate 3224.

[0119] Similarly, the second connecting plate 3224 having multiple connecting channels can divert the heat exchange medium flowing into the second flow channel area 312. The multiple flow channels 313 in the second flow channel area 312 do not need to adopt multiple joint units 32. They can be connected to the heat exchange pipeline outside the battery pack 100 only through the second connecting plate 3224, which is conducive to simplifying the overall structure of the heat exchange plate.

[0120] In order to further reduce the temperature difference of the entire battery cell 1021, that is, the temperature difference between the main body 21 of the battery cell 1021 and the tab end 22 of the battery cell 1021, optionally, as Figure 6 As shown, the heat exchange plate structure 103 further includes a heat spreader 33, which is connected to the flow channel plate 31, and is suitable for being connected to the battery cell 1021. In the process of heat exchange between the heat exchange plate structure 103 and the battery cell 1021, the heat spreader 33 can achieve uniform heat exchange between the battery cell 1021 and the heat exchange plate structure 103, further reducing the temperature difference between the main body 21 of the battery cell 1021 and the pole ear end 22 of the battery cell 1021 in the battery cell unit 102, thereby reducing the temperature difference of the entire battery cell 1021.

[0121] The present disclosure does not limit the specific connection method between the heat spreader 33 and the battery cell 1021, as long as the heat spreader 33 can be connected to the battery cell 1021, and the heat spreader 33 can exchange heat with the battery cell 1021. As an embodiment of the present disclosure, the heat spreader 33 is connected to the battery cell 1021 through a thermal conductive adhesive 34. The thermal conductive adhesive 34 can not only connect the heat spreader 33 to the battery cell 1021, but also realize uniform heat exchange between the heat spreader 33 and the battery cell 1021, simplifying the connection structure between the heat spreader 33 and the battery cell 1021 while meeting the heat exchange requirements between the heat spreader 33 and the battery cell 1021.

[0122] According to a third aspect of the present disclosure, a battery case 101 is provided, comprising the heat exchange plate structure 103 as described above, the heat exchange plate structure 103 being arranged on the inner side of the bottom plate of the battery case 101, or the heat exchange plate structure 103 being configured as the bottom plate of the battery case 101 (a part of the bottom plate or configured as a complete bottom plate). That is, the heat exchange plate structure 103 may belong to the bottom plate of the battery case 101, or may not belong to the bottom plate of the battery case 101. Alternatively, the heat exchange plate structure 103 is configured as the top cover of the battery case 101.

[0123] In the present disclosure, the battery box 101 may include a battery tray and a top cover disposed on an upper end of the battery tray.

[0124] According to a fourth aspect of the present disclosure, a battery pack 100 is provided, comprising a battery cell 1021 and a battery case 101 as described above, wherein the battery cell 1021 is disposed in a cavity defined by the battery case 101, the first flow channel region 311 at least partially corresponds to a main body 21 of the battery cell 1021 and exchanges heat with the main body 21 of the battery cell 1021, and the second flow channel region 312 at least partially corresponds to a pole tab end 22 of the battery cell 1021 and exchanges heat with the pole tab end 22 of the battery cell 1021.

[0125] The battery pack 100 has all the beneficial effects of the above-mentioned heat exchange plate structure 103, which will not be described in detail here.

[0126] The present disclosure does not limit the connection relationship between the heat exchange plate structure 103 and the battery case 101. The heat exchange plate structure 103 can be a part of the battery case 101 or can be installed separately on the battery case 101. As an exemplary embodiment of the present disclosure, the heat exchange plate structure 103 is integrated on the battery case 101 by a stir friction welding process.

[0127] In order to facilitate the detection of the temperature in the battery pack 100 and improve the safety of the battery pack 100, the battery pack 100 optionally further includes a first temperature sensor (not shown) and a second temperature sensor (not shown), wherein the first temperature sensor is used to monitor the temperature of the tab end 22 of the battery cell 1021, and the second temperature sensor is used to monitor the temperature of the main body 21 of the battery cell 1021. Optionally, the first temperature sensor can be arranged on the tab end 22 of the battery cell 1021, and the second temperature sensor can be arranged on the main body 21 of the battery cell 1021. The first temperature sensor can monitor the temperature of the tab end 22 of the battery cell and the main body 21 of the battery cell in real time, effectively avoiding the situation where the tab end 22 of the battery cell 1021 or the main body 21 of the battery cell 1021 is too high, resulting in damage to the battery pack 100 or even explosion.

[0128] In addition, the first temperature sensor and the second temperature sensor can also cooperate with the flow channel plate 31 to jointly realize the thermal management of the battery cell 1021. For example, when the battery cell 1021 needs to dissipate heat, if the temperature of the main body 21 of the battery cell 1021 is lower than the cooling threshold, and the temperature of the pole ear end 22 of the battery cell 1021 is higher than the cooling threshold, at this time, the heat exchange medium can be prevented from flowing to the flow channel 313 in the first flow channel area 311, and the heat exchange medium only flows to the flow channel 313 in the second flow channel area 312. The second flow channel area 312 on the heat exchange plate exchanges heat with the pole ear end 22 of the battery cell 1021, and the first flow channel area 311 on the heat exchange plate does not exchange heat with the main body 21 of the battery cell 1021. In this way, energy consumption can be saved while reducing the temperature difference of the battery cell 1021.

[0129] The present disclosure does not limit the specific type of the heat exchange medium filled in the flow channels 313 of the first flow channel area 311 and the second flow channel area 312. The heat exchange medium may be any heat exchange medium suitable for exchanging heat with the battery cell 1021. As an exemplary embodiment of the present disclosure, the heat exchange medium may be R134 or R134A, etc.

[0130] According to a fourth aspect of the present disclosure, there is provided an electric device, comprising a device body 21 and the battery pack 100 as described above, the battery pack 100 being mounted on the device body 21 and used to supply power to the device body 21. In this way, the battery pack 100 can supply power to the device body 21, thereby meeting the power demand of the electric device.

[0131] Here, the electrical equipment may be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, electric tools, etc. Vehicles may be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles and spacecrafts, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators and electric planers, etc., which are not limited in the present disclosure.

[0132] For example, when the electrical device is a vehicle, the device body 21 may be a motor of the vehicle, and the battery pack 100 may be installed on the body of the vehicle.

[0133] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0134] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0135] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A flow channel plate, characterized in that: The flow channel plate is provided with an independent first flow channel area and a second flow channel area, and the first flow channel area and the second flow channel area are both provided with flow channels; The first flow channel area is suitable for at least partially corresponding to the main body of the battery core to exchange heat with the main body of the battery core, and the second flow channel area is suitable for at least partially corresponding to the pole ear end of the battery core to exchange heat with the pole ear end of the battery core; The inlet and outlet of the flow channel in the first flow channel area are suitable for connecting to a first joint, and the inlet and outlet of the flow channel in the second flow channel area are suitable for connecting to a second joint.

2. The flow channel plate according to claim 1, characterized in that: In a region of the same area, the total area of ​​the flow channels in the second flow channel region is greater than the total area of ​​the flow channels in the first flow channel region.

3. The flow channel plate according to claim 2, characterized in that: The first flow channel area and the second flow channel area are both provided with a plurality of flow channels; The density of the flow channels in the second flow channel area is greater than the density of the flow channels in the first flow channel area.

4. The flow channel plate according to claim 3, characterized in that: In the first flow channel area, in a first direction, from the middle of the first flow channel area to both ends of the first flow channel area, the density of the flow channels in the first flow channel area gradually increases.

5. The flow channel plate according to claim 3, characterized in that: The first flow channel area includes a plurality of first flow channel segments extending along a first direction, and two adjacent first flow channel segments are arranged at intervals in a second direction. A plurality of the first flow channel segments are connected, and the first direction intersects with the second direction; the second flow channel region includes a plurality of second flow channel segments extending along the first direction, two adjacent second flow channel segments are spaced apart in the second direction, and a plurality of the second flow channel segments are connected; Wherein, along the second direction, a distance between two adjacent first flow channel sections is greater than a distance between two adjacent second flow channel sections.

6. The flow channel plate according to claim 5, characterized in that: In the first flow channel area, in the first direction, from the middle of the first flow channel area to both ends of the first flow channel area, the distance between two adjacent first flow channel sections gradually decreases.

7. The flow channel plate according to any one of claims 1 to 6, characterized in that: The number of the first flow channel areas is multiple, and the flow channel plate includes multiple first inlet flow channels and multiple first outlet flow channels; Each first flow channel area is suitable for being connected to the first joint through a respective first inlet flow channel and a respective first outlet flow channel.

8. The flow channel plate according to claim 7, characterized in that: The first discharge flow channel of one of the two adjacent first flow channel areas is arranged adjacent to the first discharge flow channel of the other of the two adjacent first flow channel areas, and is discharged through the same outlet on the flow channel plate.

9. The flow channel plate according to any one of claims 1 to 6, characterized in that: There are multiple second flow channel areas, and the flow channels of the multiple second flow channel areas are connected in sequence; The flow channel plate includes a plurality of second inlet flow channels; At least some of the second flow channel areas among the plurality of second flow channel areas are suitable for being connected to the second joint through corresponding second inlet flow channels.

10. The flow channel plate according to claim 9, characterized in that: The flow channel plate includes connecting flow channels; The connecting flow channel connects two of the second flow channel areas that are located closest to the second joint among the plurality of the second flow channel areas; The connecting flow channel is arranged side by side with the second inlet flow channel to exchange heat with the second inlet flow channel.

11. The flow channel plate according to any one of claims 1 to 6, characterized in that: The number of the second flow channel areas is multiple; A plurality of the second flow channel areas are arranged at intervals, and a first flow channel area is provided between two adjacent second flow channel areas.

12. The flow channel plate according to claim 11, characterized in that: The number of the second flow channel areas is four, and the number of the first flow channel areas is two; The four second flow channel areas are arranged at intervals along the first direction, and one first flow channel area is arranged between two adjacent second flow channel areas.

13. The flow channel plate according to any one of claims 1 to 6, characterized in that: The flow channel plate is provided with a first inlet, a first outlet, a second inlet and a second outlet; The first inlet is connected to the inlet of the flow channel in the first flow channel area, and the first outlet is connected to the outlet of the flow channel in the first flow channel area; The second inlet is connected to the inlet of the flow channel in the second flow channel area, and the second outlet is connected to the outlet of the flow channel in the second flow channel area; The first inlet and the first outlet are suitable for being connected to the first joint, and the second inlet and the second outlet are suitable for being connected to the second joint.

14. The flow channel plate according to claim 13, characterized in that: The first inlet, the first outlet, the second inlet and the second outlet are all located on the same side of the flow channel plate.

15. The flow channel plate according to any one of claims 1 to 6, characterized in that: The surface of the flow channel plate located at the first flow channel area has a first protrusion, and the interior of the first protrusion is suitable for constructing a flow channel in the first flow channel area; and / or, The surface of the flow channel plate located at the second flow channel area has a second protrusion, and the interior of the second protrusion is suitable for constructing a flow channel in the second flow channel area.

16. A heat exchange plate structure, characterized in that: Comprising a joint unit and a flow channel plate according to any one of claims 1 to 15; The flow channels in the first flow channel area and the flow channels in the second flow channel area are connected to the heat exchange pipeline outside the battery pack through the joint unit.

17. The heat exchange plate structure according to claim 16, characterized in that: The joint unit also includes a first joint and a second joint; The first joint is provided with a first opening and a second opening, and the flow channel plate includes a first inlet flow channel and a first outlet flow channel; The first opening is connected to the inlet of the flow channel in the first flow channel area through the first inlet flow channel, and the second opening is connected to the outlet of the flow channel in the first flow channel area through the first outlet flow channel; The second joint is provided with a third opening and a fourth opening, and the flow channel plate includes a second inlet flow channel and a connecting flow channel; The third opening is connected to the inlet of the flow channel in the second flow channel area through the second inlet flow channel, and the fourth opening is connected to the outlet of the flow channel in the second flow channel area through the connecting flow channel.

18. The heat exchange plate structure according to claim 17, characterized in that: The first joint comprises a first joint body and a first connecting plate, the first connecting plate is mounted on the flow channel plate, a plurality of connecting channels are formed in the first connecting plate, the first joint body is provided with the first opening and the second opening, the first opening is connected to the first inlet flow channel through the connecting channel in the first connecting plate, and the second opening is connected to the first outlet flow channel through the connecting channel in the first connecting plate; and / or, The second joint includes a second joint body and a second connecting plate, the second connecting plate is installed on the flow channel plate, a plurality of connecting channels are formed in the second connecting plate, the second joint body is provided with the third opening and the fourth opening, the third opening is connected to the second inlet flow channel through the connecting channel in the second connecting plate, and the fourth opening is connected to the connecting flow channel through the connecting channel in the second connecting plate.

19. The heat exchange plate structure according to claim 16, characterized in that: The heat exchange plate structure further includes a heat spreader, which is connected to the flow channel plate and is suitable for being connected to the battery core.

20. A battery box, characterized in that: comprising a heat exchange plate structure according to any one of claims 16 to 19; The heat exchange plate structure is arranged on the inner side of the bottom plate of the battery box, or the heat exchange plate structure is configured as the bottom plate of the battery box, or the heat exchange plate structure is configured as the top cover of the battery box.

21. A battery pack, characterized in that: comprising a battery cell and a battery box according to claim 20; The battery cell is arranged in a cavity defined by the battery case, the first flow channel area at least partially corresponds to the main body of the battery cell and exchanges heat with the main body of the battery cell, and the second flow channel area at least partially corresponds to the pole tab end of the battery cell and exchanges heat with the pole tab end of the battery cell.

22. The battery pack according to claim 21, characterized in that: The battery pack further includes a first temperature sensor and a second temperature sensor, wherein the first temperature sensor is used to monitor the temperature of the tab end of the battery cell, and the second temperature sensor is used to monitor the temperature of the main body of the battery cell.

23. An electrical equipment, characterized in that: include: A device body and a battery pack according to claim 21 or 22; Wherein, the battery pack is installed on the device body and is used to supply power to the device body.

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