Liquid cooling plate and battery pack

Abstract

The utility model provides a liquid cooling plate and a battery pack, the liquid cooling plate comprises a runner plate, a cover plate and a confluence plate which are stacked in sequence, the runner plate is provided with a first confluence runner and a plurality of heat exchange runners arranged in parallel, the cover plate is provided with a first cooling liquid port, and the first cooling liquid port is communicated with the first confluence runner; and the confluence plate is provided with a second confluence flow channel and a second cooling liquid port, the second confluence flow channel is communicated with the second cooling liquid port, and each heat exchange flow channel is communicated with the first confluence flow channel and the second confluence flow channel. The liquid cooling plate and the battery pack are simple in structure, convenient to manufacture, capable of effectively improving the cooling effect and good in temperature uniformity.

Description

Technical Field

[0001] The present application relates to the technical field of power batteries, and in particular to a liquid cooling plate and a battery pack. Background Art

[0002] Battery packs are used to store energy to supply energy-consuming equipment when needed. However, when the battery pack is in use, heat energy is also generated. The main cooling methods for the battery pack include liquid cooling, air cooling, and natural cooling. Among them, liquid cooling is highly efficient and widely applicable. Therefore, liquid cooling is often used to cool the battery pack. Usually, a liquid cooling plate is manufactured to cool the battery pack. At present, the cooling effect of the liquid cooling plate on different areas in the battery pack is uneven. Therefore, a liquid cooling plate with good temperature uniformity is urgently needed. Utility Model Content

[0003] In view of this, the purpose of the present application is to propose a liquid cooling plate and a battery pack to solve the related problems mentioned in the background technology.

[0004] In a first aspect of the present application, a liquid cooling plate is provided, comprising a flow channel plate, a cover plate and a busbar plate which are stacked in sequence, wherein the flow channel plate is provided with a first converging flow channel and a plurality of heat exchange flow channels arranged in parallel, and the cover plate is provided with a first cooling liquid port, which is connected to the first converging flow channel; a second converging flow channel and a second cooling liquid port are provided on the busbar plate, which are connected to the second cooling liquid port, and each of the heat exchange flow channels is respectively connected to the first converging flow channel and the second converging flow channel.

[0005] Furthermore, a first resistance reducing channel connected in parallel with the first merging channel is provided on the channel plate, and a distance between the first resistance reducing channel and the first coolant port is greater than a distance between the first merging channel and the first coolant port.

[0006] Furthermore, a second resistance reducing channel connected in parallel with the second merging channel is provided on the confluence plate, and a distance between the second resistance reducing channel and the second coolant port is greater than a distance between the second merging channel and the second coolant port.

[0007] Furthermore, the cover plate is provided with a plurality of through holes, each of the through holes being connected to the heat exchange channel and the second merging channel.

[0008] Furthermore, the spacing between each of the heat exchange channels and the second coolant port is a first spacing, the cross-sectional size of the through hole corresponding to the heat exchange channel is positively correlated with the first spacing of the heat exchange channel, and / or the number of the through holes corresponding to the heat exchange channel is positively correlated with the first spacing of the heat exchange channel.

[0009] Furthermore, the first merging flow channel and the second merging flow channel are located on the same side of the heat exchange flow channel.

[0010] Furthermore, the heat exchange channel has a decreasing section and an increasing section, the flow area of ​​the decreasing section is smaller than the flow area of ​​the increasing section, and along the extension direction of the heat exchange channel, the increasing section and the decreasing section are alternately arranged.

[0011] Furthermore, the first coolant port is a liquid outlet, the second coolant port is a liquid inlet, each of the heat exchange channels includes a liquid inlet channel located in the middle and liquid return channels located on both sides of the liquid inlet channel, and the liquid inlet channel and the liquid return channel are connected.

[0012] Furthermore, the middle portion of each of the heat exchange channels includes two connected liquid inlet channels, and a liquid return channel is respectively provided on both sides of the two liquid inlet channels, and the flow area of ​​the liquid inlet channel is the same as the flow area of ​​the liquid return channel.

[0013] A second aspect of the present application provides a battery pack, comprising a shell and a liquid cooling plate as described in the first aspect above, arranged at the bottom of the shell, wherein a plurality of battery modules are arranged on the liquid cooling plate, and the battery modules are arranged corresponding to the heat exchange flow channel.

[0014] From the above, it can be seen that the liquid cooling plate and battery pack provided in the present application, the liquid cooling plate includes a flow channel plate, a cover plate and a busbar plate which are stacked in sequence, the flow channel plate is provided with a first converging flow channel and a plurality of heat exchange flow channels arranged in parallel, the cover plate is provided with a first cooling liquid port, the first cooling liquid port is connected to the first converging flow channel; the busbar plate is provided with a second converging flow channel and a second cooling liquid port, the second converging flow channel is connected to the second cooling liquid port, each of the heat exchange flow channels is respectively connected to the first converging flow channel and the second converging flow channel, so that the cooling After the coolant enters the second confluent channel through the second coolant port, it can flow into different heat exchange channels at the same time, and finally merge at the first confluent channel and flow out through the first coolant port, or flow in the opposite direction, so that the heat exchange effects of different heat exchange channels are the same, and the temperature uniformity effect is improved. Compared with the series-connected heat exchange channels, the parallel-connected heat exchange channels in this scheme have a lower pressure drop, better safety and cooling effect. When applied to a battery pack, the temperature consistency of different battery modules in the battery pack is guaranteed. The liquid cooling plate and the battery pack have a simple structure and are easy to manufacture, which can effectively improve the cooling effect and have good temperature uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present application or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a perspective structural schematic diagram of a liquid cooling plate in an embodiment of the present application;

[0017] Figure 2 for Figure 1 Schematic diagram of the coolant flow of the liquid cold plate;

[0018] Figure 3 This is a schematic diagram of the structure of the flow channel plate in the embodiment of the present application;

[0019] Figure 4 This is a schematic diagram of the structure of the cover plate in the embodiment of the present application;

[0020] Figure 5 Schematic diagram of the structure of the busbar in the embodiment of the present application.

[0021] Figure numerals: 1, flow channel plate; 2, cover plate; 2-1, first coolant port; 2-2, through hole; 3, confluence plate; 3-1, second coolant port; 4, first confluent channel; 4-1, first resistance reduction channel; 5, heat exchange channel; 5-1, liquid inlet channel; 5-1-1, liquid inlet sub-channel; 5-1-2, liquid inlet confluence structure; 5-2, liquid return channel; 5-2-1, liquid return sub-channel; 5-2-2, liquid return confluence structure; 6, second confluent channel; 6-1, second resistance reduction channel. DETAILED DESCRIPTION

[0022] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0023] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should be the usual meanings understood by people with ordinary skills in the field to which the present application belongs. The "first", "second" and similar words used in the embodiments of the present application do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing in front of the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0024] Battery packs are used to store energy to supply energy-consuming devices when needed. However, when the battery pack is in use, heat energy is also generated. If the generated heat energy is not dissipated in time, the battery pack temperature will be too high, which will directly lead to damage to the battery pack.

[0025] The main cooling methods for battery packs include liquid cooling, air cooling and natural cooling. Among them, liquid cooling is efficient and widely applicable. Therefore, liquid cooling is often used to cool battery packs. Liquid cooling plates are usually manufactured to cool battery packs. At present, the cooling effects of liquid cooling plates on different areas of the battery pack are uneven. For example, because the flow channels of the liquid cooling plates are mostly connected in series, for different battery modules in the battery pack, the cooling effect is usually better for the battery modules closer to the liquid inlet, while the cooling effect is poor for the battery modules farther from the liquid inlet, resulting in large differences in the temperatures of different battery modules, which will reduce the service life of the battery pack. Therefore, a liquid cooling plate with good temperature equalization effect is urgently needed.

[0026] Below, through specific embodiments and in combination with the attached Figures 1 to 5 The technical solution of this application is further described in detail.

[0027] In some embodiments of the present application, a liquid cooling plate is provided, such as Figure 1 As shown, it includes a flow channel plate 1, a cover plate 2 and a busbar 3 which are stacked in sequence, the flow channel plate 1 is provided with a first converging flow channel 4 and a plurality of heat exchange flow channels 5 which are arranged in parallel, the cover plate 2 is provided with a first coolant port 2-1, and the first coolant port 2-1 is connected to the first converging flow channel 4; the busbar 3 is provided with a second converging flow channel 6 and a second coolant port 3-1, and the second converging flow channel 6 is connected to the second coolant port 3-1, and each heat exchange flow channel 5 is respectively connected to the first converging flow channel 4 and the second converging flow channel 6.

[0028] The liquid cooling plate includes a flow channel plate 1, a cover plate 2 and a manifold plate 3 which are stacked in sequence, with the flow channel plate 1 being located at the bottom, the cover plate 2 being in the middle, and the manifold plate 3 being located at the top. The three plates may be connected by brazing or the like, without specific limitation.

[0029] like Figure 3 As shown, it is a schematic diagram of the structure of the flow channel plate 1. The shape of the flow channel plate 1 can be designed according to the bottom shape of the battery pack. A first converging flow channel 4 and a plurality of heat exchange flow channels 5 can be formed thereon by stamping to accommodate coolant. The number of heat exchange flow channels 5 is, for example, three, which is not specifically limited. The plurality of heat exchange flow channels 5 are connected in parallel with the first converging flow channel 4.

[0030] like Figure 4 As shown, it is a schematic diagram of the structure of the cover plate 2. The shape of the cover plate 2 is the same as that of the flow channel plate 1. It is used to cover the flow channel plate 1 to form a closed flow channel. The battery module in the battery pack can be directly set on the cover plate 2 to contact with the heat exchange flow channel 5 for cooling; the cover plate 2 is provided with a first coolant port 2-1, and the first coolant port 2-1 is connected to the first confluent flow channel 4 as an inlet or outlet of the coolant.

[0031] like Figure 5 As shown, it is a schematic diagram of the structure of the convergence plate 3. The convergence plate 3 is in the shape of a strip, etc., on which a second converging flow channel 6 can be formed by stamping, and the cover plate 2 covers the convergence plate 3 to form a closed flow channel; the second converging flow channel 6 is provided with a second coolant port 3-1 as an inlet or outlet for the coolant.

[0032] like Figure 1 As shown, each heat exchange channel 5 is connected to the first converging channel 4 and the second converging channel 6 respectively, so that after the coolant enters the second converging channel 6 through the second coolant port 3-1, it can flow into different heat exchange channels 5 at the same time, and finally merge at the first converging channel 4 and flow out through the first coolant port 2-1, or flow in the opposite direction. After the coolant enters the first converging channel 4 through the first coolant port 2-1, it can flow into different heat exchange channels 5 at the same time, and finally merge at the second converging channel 6 and flow out through the second coolant port 3-1; the design of the converging channel facilitates diversion, so that the heat exchange effects of different heat exchange channels 5 are the same, and the temperature equalization effect is improved. Compared with the heat exchange channels 5 connected in series, the heat exchange channels 5 connected in parallel have a lower pressure drop, better safety and cooling effect, and when applied to a battery pack, the temperature consistency of different battery modules in the battery pack is guaranteed.

[0033] In addition, the external manifold 3 can prevent the second merging channel 6 from connecting to the heat exchange channel 5 and affect the first merging channel 4 from connecting to the heat exchange channel 5, thereby improving space utilization.

[0034] The liquid cooling plate has a simple structure and is easy to manufacture, can effectively improve the cooling effect, and has good temperature uniformity.

[0035] In some embodiments, Figure 3 As shown, the flow channel plate 1 is provided with a first resistance reducing flow channel 4-1 connected in parallel with the first converging flow channel 4, and the distance between the first resistance reducing flow channel 4-1 and the first coolant port 2-1 is greater than the distance between the first converging flow channel 4 and the first coolant port 2-1.

[0036] The distances between the heat exchange channel 5 and the first coolant port 2-1 are not always the same. Figure 3 As shown, the leftmost heat exchange channel 5 is farthest from the first coolant port 2-1, so the coolant flows the longest distance, has the greatest resistance, and has the least corresponding flow rate, which will lead to a decrease in the heat exchange effect; by setting the first resistance reduction channel 4-1 in parallel with the first converging channel 4, and making the distance between the first resistance reduction channel 4-1 and the first coolant port 2-1 greater than the distance between the first converging channel 4 and the first coolant port 2-1, the resistance at the leftmost heat exchange channel 5 can be reduced, so as to evenly distribute the coolant flow entering or leaving different heat exchange channels 5, thereby ensuring the uniformity of the heat exchange effect.

[0037] In some embodiments, Figure 5 As shown, the confluence plate 3 is provided with a second resistance reducing channel 6-1 connected in parallel with the second merging channel 6, and the distance between the second resistance reducing channel 6-1 and the second coolant port 3-1 is greater than the distance between the second merging channel 6 and the second coolant port 3-1.

[0038] Similar to the above principle, the distance between the heat exchange channel 5 and the second coolant port 3-1 is not always the same. Figure 5 As shown, the leftmost heat exchange channel 5 is farthest from the second coolant port 3-1, so the coolant flows the longest distance, has the greatest resistance, and has the least corresponding flow rate, which will lead to a decrease in the heat exchange effect; by setting the second resistance reduction channel 6-1 in parallel with the second converging channel 6, and making the distance between the second resistance reduction channel 6-1 and the second coolant port 3-1 greater than the distance between the second converging channel 6 and the second coolant port 3-1, the resistance at the leftmost heat exchange channel 5 can be reduced, so as to evenly distribute the coolant flow entering or leaving different heat exchange channels 5, thereby ensuring the uniformity of the heat exchange effect.

[0039] In some embodiments, Figure 1 As shown, the manifold 3 is arranged to avoid the first coolant port 2-1 and the cover plate 2, so that the first coolant port 2-1 and the second coolant port 3-1 are conveniently connected to the liquid inlet pipe or the liquid outlet pipe respectively to avoid interference.

[0040] In some embodiments, Figure 4As shown, the cover plate 2 is provided with a plurality of through holes 2 - 2 , each of which connects the heat exchange channel 5 and the second merging channel 6 , facilitating the merging or diverging of the second merging channel 6 , and avoiding interference with the connection between the heat exchange channel 5 and the first merging channel 4 .

[0041] In some embodiments, the spacing between each heat exchange channel 5 and the second coolant port 3-1 is a first spacing, the cross-sectional size of the through hole 2-2 corresponding to the heat exchange channel 5 is positively correlated with the first spacing of the heat exchange channel 5, and / or the number of through holes 2-2 corresponding to the heat exchange channel 5 is positively correlated with the first spacing of the heat exchange channel 5.

[0042] The distance between each heat exchange channel 5 and the second coolant port 3-1 is the first distance. The larger the first distance, the farther the heat exchange channel 5 is from the second coolant port 3-1, and the longer the distance of the coolant flow, the greater the resistance, and the smaller the corresponding flow rate. The cross-sectional size or number of the through holes 2-2 corresponding to the heat exchange channel 5 is positively correlated with the first distance of the heat exchange channel 5. The flow rate is increased by increasing the connection area between the heat exchange channel 5 and the second confluence channel, so as to evenly enter or leave the coolant flow of different heat exchange channels 5, thereby ensuring the uniformity of the heat exchange effect; for example Figure 1 As shown, the first spacing of the leftmost heat exchange channel 5 is the largest, and it is provided with three through holes 2-2; the first spacing of the middle heat exchange channel 5 is the smallest, and it is only provided with one through hole 2-2; the first spacing of the rightmost heat exchange channel 5 is centered, and it is provided with two through holes 2-2.

[0043] In some embodiments, Figure 1 As shown, the first merging flow channel 4 and the second merging flow channel 6 are located on the same side of the heat exchange flow channel 5, which is convenient for connection and can save the cost of pipeline components.

[0044] In some embodiments, Figure 3 As shown, the heat exchange channel 5 and the first merging channel 4 are arranged perpendicular to each other, so that the heat exchange channel 5 and the battery module are arranged correspondingly for cooling.

[0045] In some embodiments, Figure 2 As shown, Figure 1 Schematic diagram of the coolant flow direction of the liquid cooling plate, with the first coolant port 2-1 as the outlet and the second coolant port 3-1 as the inlet, so that after the coolant enters the second confluent channel 6 through the second coolant port 3-1, it can flow into different heat exchange channels 5 at the same time, and finally converge at the first confluent channel 4 and flow out through the first coolant port 2-1.

[0046] In some embodiments, Figure 1As shown, each heat exchange channel 5 includes a liquid inlet channel 5-1 located in the middle and liquid return channels 5-2 located on both sides of the liquid inlet channel 5-1. The liquid inlet channel 5-1 and the liquid return channel 5-2 are connected, so that the middle of the heat exchange channel 5 is the liquid inlet channel 5-1 with a lower temperature, and the two sides are the liquid return channels 5-2 with a higher temperature. Because the heat exchange channel 5 is used for cooling the battery module, and the battery module is usually at a higher temperature in the middle, the design of the heat exchange channel 5 can further balance the heat exchange effect and make the battery module evenly cooled.

[0047] In some embodiments, Figure 1 As shown, the middle part of each heat exchange channel 5 includes two connected liquid inlet channels 5-1, and a liquid return channel 5-2 is respectively provided on both sides of the two liquid inlet channels 5-1. The flow area of ​​the liquid inlet channel 5-1 is the same as the flow area of ​​the liquid return channel 5-2. The liquid inlet channel 5-1 and the liquid return channel 5-2 form a symmetrical U-shaped channel to ensure a balanced heat exchange effect.

[0048] In some embodiments, Figure 3 As shown, the heat exchange channel 5 has a reducing section and an increasing section. The flow area of ​​the reducing section is smaller than the flow area of ​​the increasing section. Along the extension direction of the heat exchange channel 5, the increasing section and the reducing section are arranged alternately. This can facilitate the corresponding battery module design and avoid brazing holes, that is, brazing holes can be set near the reducing section.

[0049] In some embodiments, the liquid inlet channel 5-1 includes multiple liquid inlet sub-channels 5-1-1 (increasing sections) and a liquid inlet confluence structure 5-1-2 (reducing sections) connecting the multiple liquid inlet sub-channels 5-1-1; the liquid return channel 5-2 includes multiple liquid return sub-channels 5-2-1 (increasing sections) and a liquid return confluence structure 5-2-2 (reducing sections) connecting the multiple liquid return sub-channels 5-2-1.

[0050] like Figure 3 As shown, a liquid inlet channel 5-1 includes two liquid inlet sub-channels 5-1-1 and a liquid inlet confluence structure 5-1-2 connecting the two liquid inlet sub-channels 5-1-1. By setting the liquid inlet confluence structure 5-1-2, the battery module design can be corresponding to avoid the brazing holes. Similarly, a liquid return channel 5-2 includes two liquid return sub-channels 5-2-1 and a liquid return confluence structure 5-2-2 connecting the two liquid return sub-channels 5-2-1. The battery module design can be corresponding to avoid the brazing holes.

[0051] In some embodiments of the present application, a battery pack is provided, including a shell and a liquid cooling plate as described in any of the above embodiments arranged at the bottom of the shell, and a plurality of battery modules are arranged on the liquid cooling plate, and the battery modules are arranged corresponding to the heat exchange flow channel 5.

[0052] The battery modules are arranged corresponding to the heat exchange channels 5, so that a liquid inlet channel 5-1 and a liquid return channel 5-2 are arranged at the bottom of each row of battery modules to ensure temperature consistency and improve the service life of the battery pack.

[0053] Battery packs can be applied to electrical equipment, which can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys and electric tools, etc. Vehicles can be fuel vehicles, gas vehicles or new energy vehicles, and new energy vehicles can 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.

[0054] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. In line with the concept of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0055] In addition, when details are set forth to describe exemplary embodiments of the present application, it is obvious to those skilled in the art that the present application embodiments can be implemented without these details or with changes in these details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0056] While the present application has been described in conjunction with embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description.

[0057] The embodiments of the present application are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of the present application.

Claims

1. A liquid cooling plate, characterized in that: It comprises a flow channel plate, a cover plate and a confluence plate which are stacked in sequence, wherein the flow channel plate is provided with a first confluence flow channel and a plurality of heat exchange flow channels which are arranged in parallel, and the cover plate is provided with a first coolant port, and the first coolant port is communicated with the first confluence flow channel; The manifold is provided with a second converging flow channel and a second coolant port, the second converging flow channel is communicated with the second coolant port, and each of the heat exchange flow channels is respectively communicated with the first converging flow channel and the second converging flow channel.

2. The liquid cooling plate according to claim 1, characterized in that: The flow channel plate is provided with a first resistance reducing flow channel connected in parallel with the first merging flow channel, and the distance between the first resistance reducing flow channel and the first coolant port is greater than the distance between the first merging flow channel and the first coolant port.

3. The liquid cooling plate according to claim 1, characterized in that: The confluence plate is provided with a second resistance reducing channel connected in parallel with the second merging channel, and the distance between the second resistance reducing channel and the second coolant port is greater than the distance between the second merging channel and the second coolant port.

4. The liquid cooling plate according to claim 1, characterized in that: The cover plate is provided with a plurality of through holes, each of which is connected with the heat exchange channel and the second merging channel.

5. The liquid cooling plate according to claim 4, characterized in that: The distance between each heat exchange channel and the second coolant port is a first distance, the cross-sectional size of the through hole corresponding to the heat exchange channel is positively correlated with the first distance of the heat exchange channel, and / or the number of the through holes corresponding to the heat exchange channel is positively correlated with the first distance of the heat exchange channel.

6. The liquid cooling plate according to claim 1, characterized in that: The first merging flow channel and the second merging flow channel are located on the same side of the heat exchange flow channel.

7. The liquid cooling plate according to claim 6, characterized in that: The heat exchange channel has a decreasing section and an increasing section, the flow area of ​​the decreasing section is smaller than the flow area of ​​the increasing section, and along the extension direction of the heat exchange channel, the increasing section and the decreasing section are alternately arranged.

8. The liquid cooling plate according to claim 7, characterized in that: The first coolant port is a liquid outlet, the second coolant port is a liquid inlet, each of the heat exchange channels includes a liquid inlet channel located in the middle and liquid return channels located on both sides of the liquid inlet channel, and the liquid inlet channel is connected to the liquid return channel.

9. The liquid cooling plate according to claim 8, characterized in that: The middle part of each heat exchange flow channel includes two connected liquid inlet flow channels, and a liquid return flow channel is respectively provided on both sides of the two liquid inlet flow channels, and the flow area of ​​the liquid inlet flow channel is the same as the flow area of ​​the liquid return flow channel.

10. A battery pack, characterized in that: It comprises a shell and a liquid cooling plate as claimed in any one of claims 1 to 9 arranged at the bottom of the shell, wherein a plurality of battery modules are arranged on the liquid cooling plate, and the battery modules are arranged corresponding to the heat exchange flow channels.

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