Temperature regulating plate and battery pack

Abstract

The application provides a temperature adjusting plate and a battery pack. The temperature adjusting plate comprises at least one temperature adjusting area, the temperature adjusting area comprises a main flow channel and a plurality of branch flow channels, the main flow channel comprises an input flow channel and an output flow channel distributed along a first direction, the input flow channel and the output flow channel respectively extend along a second direction, the input flow channel comprises a first end and a second end distributed along the second direction, and the output flow channel is used for outputting a temperature adjusting medium; the plurality of branch flow channels are located between the input flow channel and the output flow channel, the plurality of branch flow channels are arranged along the second direction and respectively communicate with the input flow channel and the output flow channel; wherein the flow area of the plurality of branch flow channels has an increasing trend in the direction from the first end to the second end; and / or the length of the plurality of branch flow channels has a decreasing trend in the direction from the first end to the second end, so that the cooling efficiency of the temperature adjusting plate on each part of the battery module is basically consistent, and the temperature of each part of the battery module is as uniform as possible.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a temperature regulating plate and a battery pack. Background Technology

[0002] The battery pack contains a battery module and a temperature regulating plate. The temperature regulating plate is located on one side of the battery module and exchanges heat with one end of multiple cells in the battery module to cool or heat the multiple cells in the battery module.

[0003] However, in related technologies, the temperature regulation plate is not effective in regulating the temperature of the battery module, resulting in a large temperature difference between the cells of the battery module and affecting the performance of the battery module. Utility Model Content

[0004] The embodiments of this application provide a temperature regulating plate and a battery pack, which can improve the technical problem that the temperature regulating plate of the battery pack has poor temperature regulation effect on the battery module, resulting in a large temperature difference between the cells of the battery module.

[0005] In a first aspect, embodiments of this application provide a temperature regulating plate, including at least one temperature regulating area, the temperature regulating area comprising:

[0006] The main channel includes an input channel and an output channel distributed along a first direction. The input channel and the output channel extend along a second direction, and the first direction and the second direction form an angle. The input channel includes a first end and a second end distributed along the second direction. The first end is used to allow the temperature regulating medium to enter the input channel, and the output channel is used to output the temperature regulating medium.

[0007] Multiple branch channels are located between the input channel and the output channel, the multiple branch channels are arranged along the second direction and are respectively connected to the input channel and the output channel;

[0008] The flow area of ​​the plurality of branch channels tends to increase in the direction from the first end to the second end; and / or the length of the plurality of branch channels tends to decrease in the direction from the first end to the second end.

[0009] In one embodiment, the plurality of flow channels includes a first flow channel near the first end, the first flow channel including a plurality of first sub-flow channels extending along the first direction, the plurality of first sub-flow channels being connected end to end and arranged along the second direction.

[0010] In one embodiment, the plurality of flow channels includes a first flow channel near the first end, the width of the first flow channel in the second direction being greater than or equal to 14 mm and less than or equal to 18 mm.

[0011] In one embodiment, the plurality of flow channels includes a second flow channel located on one side of the first flow channel along the direction from the first end to the second end, the second flow channel extending along the first direction, one end of the second flow channel communicating with the input flow channel, and the other end of the second flow channel communicating with the output flow channel.

[0012] In one embodiment, the plurality of flow channels includes a second flow channel located on one side of the first flow channel along the direction from the first end to the second end, wherein the width of the second flow channel in the second direction is greater than or equal to 19 mm and less than or equal to 22 mm.

[0013] In one embodiment, the plurality of flow channels includes a third flow channel near the second end, the third flow channel extending along the first direction, one end of the third flow channel communicating with the input flow channel, and the other end of the third flow channel communicating with the output flow channel; in the second direction, the width of the third flow channel is greater than the width of the second flow channel.

[0014] In one embodiment, the third flow channel is further provided with a plurality of cut-off portions spaced apart along the first direction, the plurality of cut-off portions dividing the third flow channel into two second sub-flow channels arranged along the second direction, and a connecting hole is formed between two adjacent cut-off portions to connect the two second sub-flow channels.

[0015] In one embodiment, the width of the second sub-channel in the second direction is greater than or equal to 23 mm and less than or equal to 25 mm.

[0016] In one embodiment, the temperature regulating plate includes at least two temperature regulating zones disposed along the first direction, wherein in two adjacent temperature regulating zones, the output channel of one temperature regulating zone is located on the side of the input channel away from the other temperature regulating zone.

[0017] Secondly, embodiments of this application also provide a battery pack, comprising:

[0018] A temperature regulating plate, as described above, includes at least one temperature regulating zone, which includes a main flow channel and multiple branch channels. The main flow channel includes an input channel and an output channel distributed along a first direction, and the input channel and the output channel extend along a second direction at an angle to each other. The input channel includes a first end for the temperature regulating medium to enter, and the output channel is used to output the temperature regulating medium. The multiple branch channels are located between the input channel and the output channel, and are arranged along the second direction and respectively connect the input channel and the output channel. The flow area of ​​the multiple branch channels tends to increase in the direction away from the first end; and / or, the length of the multiple branch channels tends to decrease in the direction away from the first end.

[0019] The battery module is located on one side of the temperature regulating plate along a third direction, wherein the first direction, the second direction, and the third direction form an angle with each other.

[0020] In one embodiment, the temperature regulating plate has a heating film on the side facing the battery module, and the heating film has at least one opening that extends through the heating film in a third direction.

[0021] The battery pack also includes a heat-conducting structure that contacts the battery module, and the heat-conducting structure passes through the opening and contacts the temperature regulating plate.

[0022] In one embodiment, the battery module includes multiple cell rows arranged in parallel, each cell row including multiple cells, and at least one opening is configured to correspond to the interval between two adjacent cell rows.

[0023] In one embodiment, the opening extends along the length direction of the cell array; there are multiple openings, and the distribution direction of the multiple openings forms an angle with the length direction of the opening.

[0024] The beneficial effects of the embodiments of this application are as follows:

[0025] The temperature regulating plate provided in this application embodiment includes at least one temperature regulating area comprising an input channel and an output channel distributed along a first direction, and a plurality of branch channels located between the input channel and the output channel. The input channel and the output channel extend along a second direction, and the plurality of branch channels are arranged along the second direction and respectively connect to the input channel and the output channel. This allows the temperature regulating medium entering the input channel from the first end to be diverted to the plurality of branch channels, then converged to the output channel, and flowed out from the output channel. This enables the temperature regulating medium to have sufficient heat exchange with the temperature regulating plate, thereby improving the cooling or heating efficiency of the temperature regulating plate for the battery module.

[0026] Based on this, by making the flow area of ​​multiple branch channels tend to increase in the direction from the first end to the second end; and / or, making the length of multiple branch channels tend to decrease in the direction from the first end to the second end, the temperature of the temperature regulating medium in the branch channels farther from the first end of the input channel is higher and the flow rate is larger, while the temperature of the temperature regulating medium in the branch channels closer to the first end of the input channel is lower and the flow rate is smaller. This makes the cooling efficiency of the temperature regulating medium in each branch channel on the temperature regulating plate basically the same, making the temperature of the temperature regulating plate more uniform. The cooling efficiency of the temperature regulating plate on each part of the battery module is also basically the same, which helps to reduce the temperature difference between different parts of the battery module and make the temperature of each part of the battery module as uniform as possible. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery pack provided in this application.

[0029] Figure 2 This is an exploded structural diagram of one embodiment of the battery pack provided in this application.

[0030] Figure 3 A schematic diagram of one embodiment of the temperature regulating plate and heating film provided in this application;

[0031] Figure 4 An exploded view of one embodiment of the temperature regulating plate provided in this application;

[0032] Figure 5 This is a schematic diagram of the structure of one embodiment of the base plate provided in this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1-Battery pack; 10-Battery module; 11-Battery cell; 20-Temperature regulating plate; 201-Temperature regulating area; 21-Base plate; 211-Main flow channel; 2111-Input flow channel; 2112-First end; 2113-Second end; 2114-Output flow channel; 212-Branch flow channel; 2121-First flow channel; 2122-First sub-flow channel; 2123-Second flow channel; 2124-Third flow channel; 2126-Second sub-flow channel; 2127-Cut-off section; 2128-Connecting hole; 213-Output section; 22-Cover plate; 30-Second heat-conducting layer; 40-Heating film; 41-Opening; 50-First heat-conducting layer; 60-Battery box; 61-Box body; 62-Box cover; 63-Cavity; 70-Busbar; 80-Foaming adhesive; X-First direction; Y-Second direction; Z-Third direction. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0036] This application provides a temperature regulating plate and a battery pack. These will be described in detail below.

[0037] Figure 1 This is a schematic diagram of the structure of one embodiment of the battery pack 1 provided in this application. Figure 2 This is an exploded structural diagram of one embodiment of the battery pack 1 provided in this application. (See attached diagram.) Figure 1 and Figure 2 As shown, the battery pack 1 includes a battery module 10 and a temperature regulating plate 20. The battery module 10 is located on one side of the temperature regulating plate 20 in the thickness direction (third direction Z), so that the temperature regulating plate 20 can exchange heat with the battery module 10 to cool or heat the battery module 10.

[0038] Specifically, the battery module 10 includes a plurality of battery cells 11. One end of each of the plurality of battery cells 11 along the thickness direction of the temperature regulating plate 20 exchanges heat with the temperature regulating plate 20, so as to cool or heat the plurality of battery cells 11 of the battery module 10 through the temperature regulating plate 20.

[0039] It should be noted that the temperature regulating plate 20 can be used to cool or heat the battery module 10, depending on the actual needs. For example, when the temperature of the battery module 10 is high, the temperature regulating plate 20 can absorb the heat of the battery module 10 to cool it down. When the temperature of the battery module 10 is low, the temperature regulating plate 20 can heat the battery module 10 to raise its temperature.

[0040] The temperature regulating plate 20 primarily cools or heats the battery module 10 by facilitating heat exchange between its internal flow channels and the flowing temperature regulating medium. For example, when cooling the battery module 10, a cooler medium such as water or refrigerant can flow through the channels. The hotter battery module 10 transfers heat to the plate and is absorbed by the medium, thus lowering its temperature. Conversely, when heating the battery module 10, a warmer medium such as water or refrigerant can flow through its channels, transferring heat to the battery module 10.

[0041] In order to improve the temperature regulation effect of the temperature regulating plate 20 on the battery module 10, it is necessary to keep the temperature of each part of the temperature regulating plate 20 as uniform as possible when the temperature regulating medium flows through the flow channel of the temperature regulating plate 20, so that the heat exchange efficiency of each part of the temperature regulating plate 20 is basically the same as that of the battery module 10, and the temperature of each part of the battery module 10 is as uniform as possible.

[0042] However, in the related technology, the temperature difference between different parts of the temperature regulating plate 20 is large, which results in the temperature regulating plate 20 having a poor temperature regulation effect on the battery module 10, causing a large temperature difference between the cells 11 of the battery module 10, which affects the performance of the battery module 10.

[0043] To address the aforementioned problems, this application provides a temperature regulating plate 20. For example... Figure 4 and Figure 4 As shown, the temperature regulating plate 20 includes at least one temperature regulating zone 201. The temperature regulating zone 201 includes a main channel 211 and multiple branch channels 212. The multiple branch channels 212 are respectively connected to the main channel 211, so that the temperature regulating medium enters each branch channel 212 through the main channel 211, and then merges back into the main channel 211 and is discharged from the temperature regulating plate 20.

[0044] Among them, such as Figure 5As shown, the main flow channel 211 includes an input flow channel 2111 and an output flow channel 2114 distributed along the first direction X. The input flow channel 2111 and the output flow channel 2114 extend along the second direction Y, and the first direction X and the second direction Y form an angle. The angle formed by the first direction X and the second direction Y can be a right angle, an acute angle, or an obtuse angle, and there is no limitation here.

[0045] The input channel 2111 includes a first end 2112 and a second end 2113 distributed along the second direction Y. The first end 2112 is used to allow the temperature regulating medium to enter the input channel 2111, and the output channel 2114 is used to output the temperature regulating medium.

[0046] Multiple flow channels 212 are located between the input flow channel 2111 and the output flow channel 2114. The multiple flow channels 212 are arranged along the second direction Y and are respectively connected to the input flow channel 2111 and the output flow channel 2114, so that the temperature regulating medium of the input flow channel 2111 can be diverted through the multiple flow channels 212 and then converged back to the output flow channel 2114 and output from the output flow channel 2114.

[0047] The flow area of ​​the multiple branch channels 212 can be made to increase in the direction from the first end 2112 to the second end 2113. Therefore, the temperature of the temperature regulating medium in the branch channel 212 farther from the first end 2112 of the input channel 2111 is higher and the flow rate is greater, while the temperature of the temperature regulating medium in the branch channel 212 closer to the first end 2112 of the input channel 2111 is lower and the flow rate is smaller. This ensures that the cooling efficiency of the temperature regulating medium in each branch channel 212 on the temperature regulating plate 20 is basically the same, making the temperature of the temperature regulating plate 20 more uniform. The cooling efficiency of the temperature regulating plate 20 on various parts of the battery module 10 is also basically the same, which helps to reduce the temperature difference between various parts of the battery module 10 and makes the temperature of various parts of the battery module 10 as uniform as possible.

[0048] It should be noted that the increasing flow area of ​​the multiple branch channels 212 in the direction from the first end 2112 to the second end 2113 means that there are two adjacent branch channels 212 with the same flow area, and the flow area of ​​the remaining branch channels 212 increases in the direction from the first end 2112 to the second end 2113, or the flow area of ​​any two adjacent branch channels 212 increases in the direction from the first end 2112 to the second end 2113.

[0049] Alternatively, the lengths of the multiple branch channels 212 can be made to decrease in the direction from the first end 2112 to the second end 2113, and the flow resistance within the multiple branch channels 212 can also decrease in the same direction. This allows the temperature of the temperature regulating medium in the branch channels 212 farther from the first end 2112 of the input channel 2112 to be higher and have a larger flow rate, while the temperature of the temperature regulating medium in the branch channels 212 closer to the first end 2112 of the input channel 2111 to be lower and have a smaller flow rate. This ensures that the cooling efficiency of the temperature regulating medium in each branch channel 212 on the temperature regulating plate 20 is basically the same, making the temperature of the temperature regulating plate 20 more uniform. The cooling efficiency of the temperature regulating plate 20 on various parts of the battery module 10 is also basically the same, which helps to reduce the temperature difference between different parts of the battery module 10 and makes the temperature of each part of the battery module 10 as uniform as possible.

[0050] It should be noted that the increasing trend of the length of the multiple branch channels 212 in the direction from the first end 2112 to the second end 2113 means that there are two adjacent branch channels 212 with the same length, and the length of the remaining branch channels 212 increases in the direction from the first end 2112 to the second end 2113, or the length of any two adjacent branch channels 212 increases in the direction from the first end 2112 to the second end 2113.

[0051] Furthermore, the flow area of ​​multiple branch channels 212 can be made to increase in the direction from the first end 2112 to the second end 2113, and the length of multiple branch channels 212 can be made to decrease in the same direction. Alternatively, the flow area of ​​multiple branch channels 212 can be made to increase only in the direction from the first end 2112 to the second end 2113, or the length of multiple branch channels 212 can be made to decrease only in the same direction. Of course, the former can further improve the flow regulation range of the temperature regulating medium in each branch channel 212, which is beneficial to make the temperature of the temperature regulating plate 20 more uniform.

[0052] In some embodiments, such as Figure 4 and Figure 5 As shown, the plurality of flow channels 212 include a first flow channel 2121 near the first end 2112. The first flow channel 2121 includes a plurality of first sub-flow channels 2122 extending along a first direction X. The plurality of first sub-flow channels 2122 are connected end to end and are arranged along a second direction Y. As a result, the first flow channel 212 can have a longer length and greater flow resistance than the other flow channels 212, thereby resulting in a lower temperature and a smaller flow rate of the medium in the first flow channel 212 closest to the first end 2112 of the input flow channel 2111.

[0053] Specifically, the first flow channel 2121 includes three first sub-flow channels 2122 connected in series along the second direction Y. The first sub-flow channel 2122 closest to the first end 2112 of the input flow channel 2111 is connected to the input flow channel 2111. The first sub-flow channel 2122 furthest from the first end 2112 of the input flow channel 2111 is connected to the output flow channel 2114. The end of the middle first sub-flow channel 2122 closest to the input flow channel 2111 is connected to the first sub-flow channel 2122 closest to the first end 2112 of the input flow channel 2111. The end of the middle first sub-flow channel 2122 closest to the output flow channel 2114 is connected to the first sub-flow channel 2122 furthest from the first end 2112 of the input flow channel 2111. Thus, the three first sub-flow channels 2122 of the first flow channel 2121 are connected end to end.

[0054] Of course, the first flow channel 2121 can also be of other shapes, as long as the length of the first flow channel 2121 is longer than the length of the other branch channels 212.

[0055] Furthermore, the number of first flow channels 2121 can be one or more. When there are multiple first flow channels 2121, the multiple first flow channels 2121 are distributed sequentially along the direction away from the first end 2112 of the input flow channel 2111. Specifically, the multiple branch flow channels 212 include two first flow channels 2121, both of which are close to the first end 2112 of the input flow channel 2111, and the two first flow channels 2121 are arranged along the second direction Y.

[0056] In some embodiments, the temperature regulation zone 201 further includes an output section 213 located on the side of the first flow channel 2121 near the first end 2112 of the input flow channel 2111, one end of which is connected to one end of the output flow channel 2114. A higher-temperature temperature-regulating medium output from the output flow channel 2114 enters the output section 213, thereby making the lower-temperature first sub-flow channel 2122 of the temperature-regulating medium adjacent to the higher-temperature output section 213 in the second direction Y, effectively reducing the temperature difference of the battery module and improving the temperature uniformity of the battery module.

[0057] In some embodiments, the plurality of flow channels 212 may include a first flow channel 2121 near the first end 2112. The width of the first flow channel 2121 in the second direction Y is greater than or equal to 14 mm and less than or equal to 18 mm, thereby limiting the flow area of ​​the first flow channel 2121 and making the flow rate of the temperature regulating medium in the first flow channel 2121 smaller than that in other flow channels 212. The width of the first flow channel 2121 in the second direction Y may be 14.5 mm, 15 mm, 16 mm, etc., depending on the flow rate requirements of the temperature regulating medium in the first flow channel 2121.

[0058] In some embodiments, such as Figure 5 As shown, multiple flow channels 212 can include a second flow channel 2123 located on one side of the first flow channel 2121 along the direction from the first end 2112 to the second end 2113. The second flow channel 2123 extends along the first direction X, with one end of the second flow channel 2123 connected to the input flow channel 2111 and the other end of the second flow channel 2123 connected to the output flow channel 2114. Therefore, the length of the second flow channel 2123 is less than the length of the first flow channel 2121, resulting in a lower flow resistance in the second flow channel 2123 compared to the first flow channel 2121. Consequently, the flow rate of the temperature-regulating medium in the second flow channel 2123 is higher than that in the first flow channel 2121, and the temperature of the temperature-regulating medium in the second flow channel 2123 is higher than that in the first flow channel 2121.

[0059] In this embodiment of the application, by setting the first flow channel 2121 and the second flow channel 2123 in the manner described above, the flow channel with a lower temperature of the temperature regulating medium and the flow channel with a higher temperature of the temperature regulating medium can be adjacent in the second direction Y, so as to effectively reduce the temperature difference of the battery module and improve the temperature uniformity of the battery module.

[0060] In some embodiments, the plurality of flow channels 212 includes a second flow channel 2123 located on one side of the first flow channel 2121 along the direction from the first end 2112 to the second end 2113. The width of the second flow channel 2123 in the second direction Y is greater than or equal to 19 mm and less than or equal to 22 mm, thereby limiting the flow area of ​​the second flow channel 2123 and making the flow rate of the temperature regulating medium in the second flow channel 2123 greater than the flow rate of the temperature regulating medium in the first flow channel 2121. The width of the second flow channel 2123 in the second direction Y can be 19.5 mm, 20 mm, 21 mm, etc., specifically determined according to the flow rate requirements of the temperature regulating medium in the second flow channel 2123.

[0061] like Figure 5 As shown, in some embodiments, the multiple flow channels include a third flow channel 2124 near the second end 2113. The third flow channel 2124 extends along a first direction X. One end of the third flow channel 2124 is connected to the input flow channel 2111, and the other end of the third flow channel 2124 is connected to the output flow channel 2114, allowing the temperature regulating medium in the input flow channel 2111 to flow to the output flow channel 2114 through the multiple second sub-flow channels 2126. Moreover, the temperature of the temperature regulating medium in the third flow channel 2124 is higher than the temperature of the temperature regulating medium in the second flow channel 2123.

[0062] In the second direction Y, the width of the third flow channel 2124 can be greater than the width of the second flow channel 2123. Therefore, the third flow channel 2124 can be wider than the second flow channel 2123 in the second direction Y, resulting in a larger flow rate of the temperature regulating medium.

[0063] In some embodiments, a plurality of cut-off portions 2127 spaced apart along the first direction X may be provided in the third flow channel 2124. The plurality of cut-off portions 2127 divide the third flow channel 2124 into two second sub-flow channels 2126 arranged along the second direction Y. A connecting hole 2128 is formed between two adjacent cut-off portions 2127 to connect the two second sub-flow channels 2126. This avoids the third flow channel 2124 from being too wide, which would cause the flow rate of the temperature regulating medium in the third flow channel 2124 to be too large, thus affecting the temperature uniformity of various parts of the temperature regulating plate 20.

[0064] Specifically, the two second sub-channels 2126 of the third flow channel 2124 extend along the first direction X. One end of each of the two second sub-channels 2126 is connected to the input flow channel 2111, and the other end is connected to the output flow channel 2114. A cut-off portion 2127 protrudes from the inner surface of the third flow channel 2124 along the third direction Z. There are three cut-off portions 2127. The three cut-off portions 2127 are spaced apart along the first direction X. A connecting hole 2128 is formed between two adjacent cut-off portions 2127, connecting the two second sub-channels 2126.

[0065] In some embodiments, the width of the second sub-channel 2126 in the second direction Y can be greater than or equal to 23 mm and less than or equal to 25 mm, thereby limiting the flow area of ​​the third channel 2124 and making the flow rate of the temperature regulating medium in the third channel 2124 greater than that in the second channel 2123. The width of the second sub-channel 2126 in the second direction Y can be 23.5 mm, 24 mm, 24.5 mm, etc., specifically determined according to the flow rate requirements of the temperature regulating medium in the third channel 2124.

[0066] In some embodiments, the temperature regulating plate 20 includes at least two temperature regulating zones 201 disposed along a first direction X, thereby giving the temperature regulating plate 20 a larger cooling area and enabling it to cool larger battery modules 10.

[0067] Specifically, in two adjacent temperature regulation zones 201, the output flow channel 2114 of one temperature regulation zone 201 can be located on the side of the input flow channel 2111 away from the other temperature regulation zone 201. This allows the output flow channels 2114 of both temperature regulation zones 201 to be close to the higher-temperature areas of the temperature regulation plate 20, and close to the lower-temperature areas of the temperature regulation plate 20. This allows the lower-temperature temperature regulating medium to cool the higher-temperature areas of the temperature regulation plate 20, and vice versa, which helps reduce the temperature difference of the temperature regulation plate 20, thereby reducing the temperature difference of the battery module and improving the temperature uniformity of the battery module.

[0068] In some embodiments, such as Figure 4 and Figure 5 As shown, the temperature regulating plate 20 may include a base plate 21 and a cover plate 22. The cover plate 22 and the base plate 21 are stacked in the third direction Z so that the cover plate 22 and the base plate 21 enclose a main flow channel 211 and multiple branch flow channels 212.

[0069] Specifically, the base plate 21 can be stamped to form a main channel 211 and a branch channel 212. After the cover plate 22 is stacked with the base plate 21, it covers the main channel 211 and the branch channel 212.

[0070] This application embodiment also provides a battery pack, which includes a temperature regulating plate. The specific structure of the temperature regulating plate is as described in the above embodiments. Since this battery pack 1 adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0071] like Figure 1 and Figure 2 As shown, the battery pack 1 includes a temperature regulating plate 20 and a battery module 10. The battery module 10 is disposed on one side of the temperature regulating plate 20 along the third direction Z, so that the temperature regulating plate 20 can exchange heat with the battery module 10 to cool or heat the battery module 10. The first direction X, the second direction Y, and the third direction Z form an angle with each other. The angle formed by the first direction X, the second direction Y, and the third direction Z can be a right angle, an acute angle, or an obtuse angle; no limitation is made here.

[0072] In some embodiments, such as Figure 2 and Figure 3 As shown, a heating film 40 is provided on the side of the temperature regulating plate 20 facing the battery module 10. The heating film 40 can heat the battery module 10 more quickly. A resistance wire can be provided inside the heating film 40. By energizing the resistance wire, the resistance wire is heated, thereby heating the battery module 10.

[0073] In some embodiments, a first thermally conductive layer 50 may be provided between the heating film 40 and the battery module 10. The heating film 40 contacts the battery module 10 through the first thermally conductive layer 50, thereby increasing the heat exchange efficiency between the heating film 40 and the battery module 10 and enabling the heating film 40 to heat the battery module 10 more quickly.

[0074] Of course, the heating film 40 can also directly contact the battery module 10 to heat the battery module 10.

[0075] In some embodiments, a second heat-conducting layer 30 may be provided between the heating film 40 and the temperature regulating plate 20. The heating film 40 contacts the temperature regulating plate 20 through the second heat-conducting layer 30, enabling faster heat exchange between the temperature regulating plate 20 and the heating film 40. This improves the heat exchange efficiency between the temperature regulating plate 20 and the battery module 10, allowing the temperature regulating plate 20 to regulate the temperature of the battery module 10 more quickly.

[0076] Of course, the temperature regulating plate 20 can also directly contact the heating film 40, so that the temperature regulating plate 20 can exchange heat with the battery module 10 through the heating film 40.

[0077] In some embodiments, at least one opening 41 may be formed in the heating film 40, the opening 41 penetrating the heating film 40 in a third direction Z. The battery pack 1 also includes a heat-conducting structure that contacts the battery module 10, the heat-conducting structure passing through the opening 41 and contacting the temperature regulating plate 20. Thus, the temperature regulating plate 20 contacts the battery module 10 through the heat-conducting structure, enabling the temperature regulating plate 20 to exchange heat with the battery module 10 more quickly, which is beneficial to improving the temperature regulation efficiency of the temperature regulating plate 20 on the battery module 10.

[0078] In some embodiments, the battery module 10 may include a plurality of cell rows arranged in parallel, each cell row including a plurality of cells 11, and at least one opening 41 is configured to correspond to the spacing between two adjacent cell rows. This allows the heating film 40 to correspond as closely as possible to the position of the cell 11, which is beneficial for improving the heating efficiency of the heating film 40 on the cell 11.

[0079] In some embodiments, the opening 41 can be extended along the length of the cell array to lengthen the opening 41, so that the temperature regulating plate 20 can contact as many cells 11 as possible through the heat-conducting structure, thereby improving the temperature regulating plate 20's regulation efficiency of the cells 11 in the battery module 10.

[0080] In some embodiments, the number of openings 41 can be multiple, so that the temperature regulating plate 20 can contact as many cells 11 as possible through the heat-conducting structure, thereby improving the regulating efficiency of the temperature regulating plate 20 on the cells 11 of the battery module 10.

[0081] In this way, the distribution direction of the multiple openings 41 can be at an angle to the length direction of the openings 41, so that the multiple cells 11 that come into contact with the temperature regulating plate 20 through the heat-conducting structure are more evenly distributed, which is beneficial to improving the temperature regulation efficiency of the temperature regulating plate 20 for the cells 11 in each area of ​​the battery module.

[0082] Specifically, the battery module 10 has multiple cell rows arranged along the second direction Y (or the first direction X). Multiple cells 11 in each cell row are distributed along the first direction X (or the second direction Y). Foam 80 is filled between the cells 11 to position them. Multiple openings 41 are arranged along the second direction Y. The openings 41 extend along the first direction X.

[0083] In some embodiments, the battery pack 1 further includes a battery case 60, which includes a case body 61 and a case cover 62 distributed along a third direction Z. The case body 61 and the case cover 62 are connected and enclose to form a cavity 63. The battery module 10, the temperature regulating plate 20, and the heating film 40 are disposed within the cavity 63. The battery module 10 is located on the side of the temperature regulating plate 20 facing the case cover 62. A busbar 70 is also provided on the side of the battery module 10 away from the temperature regulating plate 20. The busbar 70 is connected to a plurality of battery cells 11 of the battery module 10 to connect the plurality of battery cells 11 in parallel or in series.

[0084] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A temperature regulating plate, characterized in that, Includes at least one temperature regulating zone, the temperature regulating zone comprising: The main channel includes an input channel and an output channel distributed along a first direction. The input channel and the output channel extend along a second direction, and the first direction and the second direction form an angle. The input channel includes a first end and a second end distributed along the second direction. The first end is used to allow the temperature regulating medium to enter the input channel, and the output channel is used to output the temperature regulating medium. Multiple branch channels are located between the input channel and the output channel, the multiple branch channels are arranged along the second direction and are respectively connected to the input channel and the output channel; The flow area of ​​the plurality of branch channels tends to increase in the direction from the first end to the second end; and / or the length of the plurality of branch channels tends to decrease in the direction from the first end to the second end.

2. The temperature regulating plate as described in claim 1, characterized in that, The plurality of flow channels include a first flow channel near the first end, the first flow channel including a plurality of first sub-flow channels extending along the first direction, the plurality of first sub-flow channels being connected end to end and arranged along the second direction.

3. The temperature regulating plate as described in claim 1, characterized in that, The plurality of flow channels include a first flow channel near the first end, wherein the width of the first flow channel in the second direction is greater than or equal to 14 mm and less than or equal to 18 mm.

4. The temperature regulating plate as described in claim 2 or 3, characterized in that, The plurality of branch channels include a second channel located on one side of the first channel along the direction from the first end to the second end. The second channel extends along the first direction, one end of the second channel is connected to the input channel, and the other end of the second channel is connected to the output channel.

5. The temperature regulating plate as described in claim 2 or 3, characterized in that, The plurality of flow channels include a second flow channel located on one side of the first flow channel along the direction from the first end to the second end, wherein the width of the second flow channel in the second direction is greater than or equal to 19 mm and less than or equal to 22 mm.

6. The temperature regulating plate as described in claim 4, characterized in that, The plurality of flow channels includes a third flow channel near the second end, the third flow channel extending along the first direction, one end of the third flow channel communicating with the input flow channel, and the other end of the third flow channel communicating with the output flow channel; in the second direction, the width of the third flow channel is greater than the width of the second flow channel.

7. The temperature regulating plate as described in claim 6, characterized in that, The third flow channel is further provided with a plurality of cut-off sections spaced apart along the first direction. The plurality of cut-off sections divide the third flow channel into two second sub-flow channels arranged along the second direction. A connecting hole is formed between two adjacent cut-off sections to connect the two second sub-flow channels.

8. The temperature regulating plate as described in claim 7, characterized in that, The width of the second sub-channel in the second direction is greater than or equal to 23 mm and less than or equal to 25 mm.

9. The temperature regulating plate as described in claim 1, characterized in that, The temperature regulating plate includes at least two temperature regulating zones arranged along the first direction. In two adjacent temperature regulating zones, the output flow channel of one temperature regulating zone is located on the side of the input flow channel away from the other temperature regulating zone.

10. A battery pack, characterized in that, include: A temperature regulating plate, wherein the temperature regulating plate is the temperature regulating plate according to any one of claims 1 to 9; The battery module is located on one side of the temperature regulating plate along a third direction, with the first direction, the second direction, and the third direction forming an angle with each other.

11. The battery pack as claimed in claim 10, characterized in that, The temperature regulating plate has a heating film on the side facing the battery module, and the heating film has at least one opening that penetrates the heating film along the third direction. The battery pack also includes a heat-conducting structure that contacts the battery module, and the heat-conducting structure passes through the opening and contacts the temperature regulating plate.

12. The battery pack as claimed in claim 11, characterized in that, The battery module includes multiple cell rows arranged in parallel, each cell row includes multiple cells, and at least one opening is configured to correspond to the interval between two adjacent cell rows.

13. The battery pack as claimed in claim 12, characterized in that, The opening extends along the length of the cell array; there are multiple openings, and the distribution direction of the multiple openings forms an angle with the length direction of the opening.

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