Battery pack and vehicle

Abstract

The invention provides a battery pack and a vehicle, the battery pack comprises a plurality of battery cells and is provided with a first cooling channel and a cooling cavity, the first cooling channel is used for circulating a first cooling medium, the cooling cavity is used for circulating a second cooling medium, and the first cooling medium and the second cooling medium are used for cooling the plurality of battery cells. The first cooling channel makes contact with the cooling cavity so as to cool the first cooling medium through the second cooling medium, and the first cooling medium and the second cooling medium are different. Compared with a double-layer liquid cooling plate mode in the prior art, the cooling medium in the liquid cooling plate does not need to be frequently replaced, the heat dissipation capacity of the cooling cavity is fully utilized, the first cooling medium is cooled by the second cooling medium, and therefore the material cost is reduced. In addition, the first cooling channel does not need to input and output the cooling medium through a pipeline assembly, so that space occupation required by the pipeline assembly is avoided, and the space utilization rate of the battery pack can be effectively improved.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a battery pack and a vehicle. Background Art

[0002] In the related art, in order to avoid a large temperature difference between multiple cells in a battery pack, multiple cells are usually placed between double-layer liquid cooling plates, so that both ends of each cell close to the liquid cooling plate can be effectively cooled, so that the temperature difference between various parts of each cell is small to ensure the safety of the battery pack. However, this structural design has the following defects: the space occupied by the two layers of liquid cooling plates is large, resulting in a low space utilization rate of the battery pack, and the cost of the two layers of liquid cooling plates when working is higher. Summary of the invention

[0003] Embodiments of the present invention provide a battery pack and a vehicle, which are used to solve the problem of limited heat dissipation capacity of a top liquid cooling plate when a double-layer liquid cooling plate is used to dissipate heat for multiple battery cells in the related art.

[0004] In a first aspect, an embodiment of the present invention provides a battery pack, comprising a plurality of battery cells, wherein the battery pack is provided with a first cooling channel and a cooling cavity, wherein the first cooling channel is used for circulating a first cooling medium, and the cooling cavity is used for circulating a second cooling medium, and the first cooling medium and the second cooling medium are used for dissipating heat for the plurality of battery cells: wherein the first cooling channel is thermally conductively connected to the cooling cavity to cool the first cooling medium through the second cooling medium, and the first cooling medium and the second cooling medium are different.

[0005] In one embodiment, the first cooling channel is located at the top of the plurality of battery cells, and the first cooling medium is air; the cooling cavity is located at the bottom of the plurality of battery cells, and the second cooling medium is a liquid cooling medium.

[0006] In one embodiment, the battery pack is further provided with a second cooling channel connected to the first cooling channel, and at least a portion of the second cooling channel is located below the cooling cavity and is thermally connected to the cooling cavity.

[0007] In one embodiment, the battery pack further includes at least one air guide assembly located on at least one side of the plurality of battery cells, each air guide assembly includes a plurality of air guide members, and the plurality of air guide members are connected between the first cooling channel and the second cooling channel.

[0008] In one embodiment, the second cooling channel includes a main body portion and at least one connecting portion which are interconnected, the main body portion is located below the first cooling channel, the top of each connecting portion protrudes out of the first cooling channel, and is connected to the first cooling channel through multiple air guide parts of the corresponding air guide assembly.

[0009] In one embodiment, the battery pack further includes at least one edge portion, each edge portion is located on a side of the corresponding connecting portion away from the main body portion, and a top of the edge portion has a height difference with a top wall of the connecting portion.

[0010] In one embodiment, the battery pack includes a top cover and a bottom plate, wherein the top cover is connected to the bottom plate to enclose an installation cavity for installing multiple battery cells; wherein the top cover is provided with a first cooling channel, the bottom plate is provided with a second cooling channel and a cooling cavity, and the bottom plate includes at least one edge portion.

[0011] In one embodiment, at least one air guide assembly includes two air guide assemblies located on opposite sides of the plurality of battery cells; the battery pack also includes two air supply assemblies, each air supply assembly is connected to the corresponding air guide assembly, each air supply assembly includes multiple air supply parts, each air supply part is connected to the corresponding air guide part, wherein the air supply directions of the two air supply assemblies are opposite.

[0012] In one embodiment, the gas flow rate of the plurality of air supply members is 20 CFM to 60 CFM, and the spacing between the plurality of air supply members and the first cooling channel in the extension direction of the first cooling channel is 20 mm to 50 mm.

[0013] In one embodiment, a ratio of a height of the cooling cavity to a height of the second cooling channel is greater than 2.

[0014] In one embodiment, the battery pack is provided with a plurality of first cooling channels, and the interval between every two adjacent first cooling channels is 2 mm to 10 mm.

[0015] In a second aspect, an embodiment of the present invention further provides a vehicle, the vehicle comprising a battery pack as in the first aspect.

[0016] The present invention provides a battery pack and a vehicle. The battery pack includes a plurality of battery cells, and is provided with a first cooling channel and a cooling cavity. The first cooling channel is used to circulate a first cooling medium to dissipate heat for the plurality of battery cells, and the cooling cavity is used to circulate a second cooling medium to dissipate heat for the plurality of battery cells, and the first cooling channel is thermally connected to the cooling cavity to dissipate heat for the first cooling medium through the second cooling medium, and the first cooling medium and the second cooling medium are different. Compared with the double-layer liquid cooling plate method used in the prior art, this embodiment does not require frequent replacement of the cooling medium in the liquid cooling plate, but makes full use of the heat dissipation capacity of the cooling cavity so that the first cooling medium is cooled by the second cooling medium, thereby reducing material costs. In addition, the first cooling channel does not need to input and output the cooling medium through a pipeline assembly, thereby avoiding the space occupied by the pipeline assembly, thereby effectively improving the space utilization of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 is a schematic diagram of the structure of a battery pack provided by an embodiment of the present invention;

[0019] Figure 2 yes Figure 1 Exploded diagram of

[0020] Figure 3 yes Figure 1 A top view of the battery pack;

[0021] Figure 4 It is a cross-sectional view of the battery pack in 3;

[0022] Figure 5 yes Figure 1 A schematic diagram of the structure of the middle top cover;

[0023] Figure 6 yes Figure 1 Schematic diagram of the structure of the midsole plate;

[0024] Description of reference numerals:

[0025] 100. Battery pack; 110. First cooling channel; 120. Battery cell; 130. Cooling chamber; 140. Pipe assembly; 150. Second cooling channel; 151. Main body; 152. Connecting part; 153. Edge part; 160. Air guide; 170. Air supply; 180. Top cover; 190. Bottom plate. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0027] Please refer to Figures 1 to 6 , Figure 1is a schematic structural diagram of a battery pack 100 provided in an embodiment of the present invention, Figure 2 yes Figure 1 Exploded diagram of Figure 3 yes Figure 1 A top view of the battery pack 100, Figure 4 3 is a cross-sectional view of the battery pack 100, Figure 5 yes Figure 1 Schematic diagram of the structure of the middle top cover. Figure 6 yes Figure 1 Schematic diagram of the structure of the midsole plate.

[0028] In order to solve the problem that the heat dissipation capacity of the top liquid cooling plate is limited when the battery pack uses a double-layer liquid cooling plate to dissipate heat for multiple battery cells in the related art, an embodiment of the present invention provides a battery pack 100. Please refer to Figures 1 to 5 The battery pack 100 accommodates a plurality of battery cells 120 and is provided with a first cooling channel 110 and a cooling cavity 130. The first cooling channel 110 is used to circulate a first cooling medium, and the cooling cavity 130 is used to circulate a second cooling medium. Both the first cooling medium and the second cooling medium can provide heat dissipation for the plurality of battery cells 120, and the first cooling medium is different from the second cooling medium. In addition, the first cooling channel 110 is thermally connected to the cooling cavity 130, so that the second cooling medium in the cooling cavity 130 can dissipate heat for the first cooling medium in the first cooling channel 110.

[0029] Specifically, one side of the cooling cavity 130 is close to the multiple battery cells 120, while the other side is thermally connected to the first cooling channel 110, so that the second cooling medium in the cooling cavity 130 can not only dissipate heat for the multiple battery cells 120, but also cool the first cooling medium in the first cooling channel 110, so that the first cooling medium can dissipate heat for the battery cells 120 after cooling, thereby being recycled.

[0030] In the battery pack 100 in this embodiment, the temperature of the first cooling medium in the first cooling channel 110 will rise accordingly after absorbing the heat generated by the battery cell 120. At this time, through the thermal connection between the first cooling channel 110 and the cooling cavity 130, the second cooling medium can not only provide heat dissipation for the battery cell 120, but also quickly absorb the heat of the first cooling medium, so that the first cooling medium is effectively cooled, and the first cooling medium after the temperature is reduced can be recycled again. Compared with the method of using a double-layer liquid cooling plate and frequently replacing the cooling medium in the prior art, this embodiment can make full use of the cooling cavity 130, thereby reducing material costs. In addition, the first cooling channel 110 does not need to input and output the cooling medium through the pipeline assembly, thereby avoiding the space occupied by the pipeline assembly 140, thereby effectively improving the space utilization of the battery pack 100.

[0031] In some embodiments, please refer to Figure 4 and Figure 6 . In the battery pack 100, the first cooling channel 110 is set at the top of the multiple battery cells 120, and its main function is to use air as the first cooling medium to effectively reduce the temperature of the top of the battery cell 120. During the operation of the battery pack 100, the battery cell 120 will generate heat when charging and discharging. The first cooling channel 110 inputs cold air from one end, and then fully absorbs the heat released by the battery cell 120 and outputs the hot air from the other end to keep the battery cell 120 within a safe operating temperature range. By using air as the first cooling medium, not only the structure of the first cooling channel 110 is simpler, but also the use of air to dissipate heat from the top of the battery cell 120 can avoid the condensation phenomenon that may occur when a liquid cooling plate is set on the top of the multiple battery cells 120 for heat dissipation in the related art, thereby ensuring the safety of the battery pack 100.

[0032] The cooling cavity 130 is set at the bottom of the multiple battery cells 120 and is filled with a liquid second cooling medium. The flow of the second cooling medium makes the temperature of the cooling cavity 130 lower, thereby absorbing the heat at the bottom of the battery cells 120. The application of the liquid cooling medium makes the cooling effect of the cooling cavity 130 stronger, and can quickly absorb the heat generated by the battery cells 120 to ensure that the temperature of the battery cells 120 is within a safe operating temperature range.

[0033] Specifically, the cooling chamber 130 is connected to a pipeline assembly 140 for conveying a second cooling medium. The pipeline assembly 140 is composed of an input pipeline for inputting the second cooling medium and an output pipeline for outputting the second cooling medium. The input pipeline introduces a second cooling medium with a lower temperature from an external cooling medium source, and conveys it from the outside of the battery pack 100 to the cooling chamber 130 inside the battery pack 100. In the process of flowing in the cooling chamber 130, the second cooling medium fully absorbs the heat of the cooling chamber 130 to reduce the temperature of the cooling chamber 130. As a result, the cooling chamber 130, as a heat dissipation mechanism at the bottom of the multiple battery cells 120, can efficiently absorb the heat generated by the multiple battery cells 120 to ensure that the battery cells 120 operate stably within a safe temperature range. At the same time, the first cooling medium flowing in the first cooling channel 110 also plays a vital role in heat dissipation. The first cooling medium flows along the extension direction of the first cooling channel 110 to provide heat dissipation for the tops of the multiple battery cells 120. When the first cooling medium flows out from one end of the first cooling channel 110, it has fully absorbed the heat generated by the battery cell 120, and the temperature of the first cooling medium is relatively high. Then the first cooling medium will flow along the height direction of the battery pack 100 and reach the bottom of the battery pack 100 downward. After the first cooling medium reaches the bottom of the battery pack 100, the first cooling medium flows through the cooling cavity 130 along the length direction of the cooling cavity 130, and flows from one end of the bottom of the cooling cavity 130 to the other end. In this process, since the multiple battery cells 120 are respectively located on both sides of the cooling cavity 130, the temperature of the side of the cooling cavity 130 away from the cooling cavity 130 is lower, so that the side can fully absorb the heat of the first cooling medium to effectively reduce the temperature of the first cooling medium. After the first cooling medium flows out from the other end of the bottom of the cooling cavity 130, it will flow back along the height direction of the battery pack 100 and finally reach the other end of the first cooling channel 110. Through this cycle, the first cooling medium enters the first cooling channel 110 again and provides continuous heat dissipation for the tops of the multiple battery cells 120.

[0034] In some embodiments, please refer to Figure 4 The battery pack 100 is further provided with a second cooling channel 150 connected to the first cooling channel 110 , and at least a portion of the second cooling channel 150 is located below the cooling cavity 130 and is thermally connected to the first cooling channel 110 .

[0035] The battery pack 100 is also provided with a second cooling channel 150 connected to the first cooling channel 110, wherein at least a portion of the second cooling channel 150 is located below the cooling cavity 130 and is connected to the first cooling channel 110 by heat conduction. This structural design enables the first cooling channel 110 to effectively cool the second cooling channel 150, thereby reducing its temperature to improve the overall heat dissipation performance. Specifically, the construction of the second cooling channel 150 ensures good thermal contact with the first cooling channel 110, allowing the cooling medium to perform more efficient heat exchange during the flow process. A channel for circulating the first cooling medium is provided in the second cooling channel 150, and after the hot air in the first cooling channel 110 flows out at one end, it can enter the second cooling channel 150 through one end of the channel. In the process of flowing through the second cooling channel 150, the first cooling medium exchanges heat with the second cooling channel 150 with a lower temperature, so that the temperature of the first cooling medium can be effectively reduced. After cooling, the first cooling medium will flow out from the other end of the second cooling channel 150 and return to the other end of the first cooling channel 110 again to continue to provide effective heat dissipation for the tops of the plurality of battery cells 120 .

[0036] In this embodiment, the design of the second cooling channel 150 is not only closely connected with the first cooling channel 110, but also can appropriately restrict the flow path of the first cooling medium, so that the flow direction of the cooling medium is more regular. This structural optimization ensures that the cooling cavity 130 can efficiently and stably cool the first cooling medium, thereby ensuring the temperature control of the battery pack 100 during high-performance operation, and improving the safety and service life of the battery.

[0037] In some embodiments, please refer to Figure 2 and Figure 4 The battery pack 100 further includes at least one air guide assembly located on at least one side of the plurality of battery cells 120, each air guide assembly including a plurality of air guide members 160, and the plurality of air guide members 160 are connected between the first cooling channel 110 and the second cooling channel 150. Each air guide member 160 can connect the first cooling channel 110 with the second cooling channel 150, thereby forming an efficient first cooling medium flow path.

[0038] Specifically, a plurality of air guides 160 are arranged on at least one side of a plurality of battery cells 120, wherein one end of each air guide 160 is close to the first cooling channel 110, and the other end is close to the second cooling channel 150. The purpose of designing the air guide 160 is to promote the flow of the first cooling medium and ensure that the first cooling medium can flow smoothly from the first cooling channel 110 into the second cooling channel 150. Each air guide 160 is provided with a channel for circulating the first cooling medium, so that the first cooling medium with a higher temperature is allowed to enter the second cooling channel 150 from one end of the first cooling channel 110, and / or, so that the first cooling medium with a lower temperature is allowed to enter the other end of the first cooling channel 110 from the other end of the second cooling channel 150, thereby realizing efficient transmission of the first cooling medium.

[0039] In this embodiment, by configuring these air guide components on at least one side of the plurality of battery cells 120, the first cooling medium can flow efficiently between the first cooling channel 110 and the second cooling channel 150, thereby significantly improving the cooling efficiency of the cooling chamber 130 for the cooling medium. This structural design not only limits the flow path of the first cooling medium, but also ensures the stability and continuity of the airflow, which helps to improve the cooling efficiency of the cooling chamber 130 for the first cooling medium. As a result, the operating temperature of the battery cell 120 can be maintained within a safe range, avoiding the occurrence of overheating, thereby improving the safety of the battery pack 100.

[0040] In some embodiments, please refer to Figure 4 The second cooling channel 150 includes a main body portion 151 and at least one connecting portion 152 that are interconnected. The main body portion 151 is located below the first cooling channel 110. The top of each connecting portion 152 protrudes from the first cooling channel 110 and is connected to the first cooling channel 110 through multiple air guide members 160 of the corresponding air guide assembly.

[0041] The second cooling channel 150 includes a main body 151 and at least one connecting portion 152, and the main body 151 and the connecting portion 152 are interconnected. The main body 151 is located below the first cooling channel 110, and in order to ensure effective thermal management, the top of the connecting portion 152 protrudes from the first cooling channel 110. This structural design enables the first cooling medium to be efficiently transmitted between the wind guide assembly and the first cooling channel 110.

[0042] Specifically, since all the battery cells 120 are located above the cooling cavity 130, and the air guide assembly is arranged on at least one side of the cooling cavity 130, and for the convenience of design and production, it usually extends along the height direction of the battery pack 100, which will cause a certain gap between the opening of the air guide assembly close to the second cooling channel 150 and the second cooling channel 150, so that a part of the first cooling medium will flow out of the gap instead of flowing into the second cooling channel 150. In order to ensure that the first cooling medium can be stably and efficiently transmitted between the air guide assembly and the second cooling channel 150, in this embodiment, the second cooling channel 150 includes not only a main body 151 located below the first cooling channel 110, but also a connecting part 152 connected to the main body 151, and the connecting part 152 occupies the space of the gap. The interconnectivity of these two parts ensures that the first cooling medium can achieve efficient and stable flow between the air guide assembly and the main body 151 through the connecting part 152. Through this structural design, the cooling cavity 130 can effectively cool the first cooling medium during the transmission process, thereby improving the overall thermal management capability of the battery pack 100 .

[0043] In some embodiments, please refer to Figure 4 and Figure 6 The battery pack 100 further includes at least one edge portion 153 , each edge portion 153 is located on a side of the corresponding connecting portion 152 away from the main body portion 151 , and a top of the edge portion 153 has a height difference with a top wall of the connecting portion 152 .

[0044] Among them, the edge portion 153 is used to connect the shell of the battery pack 100 to provide a sealed environment for the battery cell 120. In order to ensure the airtightness of the battery pack 100, a first seal is usually set at the connection between the shell and the edge portion 153 to fill the tiny gap between the shell and the edge portion 153. At the same time, in order to ensure the airtightness between the air guide component and the connecting portion 152, a second seal is also set at the connection between the air guide component and the connecting portion 152 to fill the tiny gap between the shell and the edge portion 153.

[0045] Specifically, in this embodiment, the top of the edge portion 153 and the top wall of the connecting portion 152 are designed to have a height difference, so that when the seal is placed between the edge portion 153 and the housing, and between the connecting portion 152 and the air guide assembly, it is easy to position, and it is not easy for the first seal and the second seal to interfere with each other. This structural design not only improves the installation efficiency of the seal, but also effectively enhances the sealing performance of the battery pack 100, thereby further improving the reliability and safety of the battery pack 100.

[0046] In some embodiments, please refer to Figure 1 , Figure 5 and Figure 6 The battery pack 100 includes a top cover 180 and a bottom plate 190, wherein the top cover 180 is connected to the bottom plate 190 to enclose a mounting cavity for mounting a plurality of battery cells 120. The top cover 180 is provided with a first cooling channel 110, and the bottom plate 190 is provided with a second cooling channel 150 and a cooling cavity 130, and includes at least one edge portion 153.

[0047] Among them, the first cooling channel 110 is arranged on one side of the top cover 180 close to the plurality of battery cells 120, while the second cooling channel 150, the edge portion 153 of the cooling cavity 130 and the bottom plate 190 are arranged. Compared with the related art in which the cooling system and the shell of the battery pack are designed independently, the battery pack 100 provided in this embodiment arranges the first cooling channel 110 on the top cover 180, and the second cooling channel 150, the cooling cavity 130 and the edge portion 153 on the bottom plate 190, which can improve the space utilization of the battery pack 100 to a certain extent.

[0048] In some embodiments, please refer to Figure 4 , an air guide assembly is respectively arranged on opposite sides of the plurality of battery cells 120. In order to further improve the transmission efficiency of the first cooling medium between the first cooling channel 110, the air guide assembly and the second cooling channel 150, the battery pack 100 also includes two air supply assemblies, and each air supply assembly is connected to a corresponding air guide assembly, and each air supply assembly includes a plurality of air supply members 170, each air supply member 170 is connected to a corresponding air guide member 160, and the air supply member 170 can accelerate the flow rate of the first cooling medium to improve its transmission efficiency. The air supply directions of the two air supply assemblies are opposite, that is, one of the air supply assemblies can accelerate the suction of the first cooling medium from the first cooling channel 110 and deliver it to the air guide assembly, and the other air supply assembly can accelerate the discharge of the first cooling medium from the air guide assembly and deliver it to the first cooling channel 110.

[0049] In order to ensure the efficiency of the air supply member in absorbing air from the first cooling channel 110 and the efficiency of blowing the air in the air guide member 160 into the first cooling channel 110, in some embodiments, when the gas flow rate of the plurality of air supply members 170 is 20CFM to 60CFM, the spacing between the plurality of air supply members 170 and the first cooling channel 110 in the extension direction of the first cooling channel 110 is set to 20mm to 50mm. This structural design can reduce the resistance of air flow to a certain extent, thereby improving the efficiency of air inhalation into the air guide member 160 and air blowing into the first cooling channel 110.

[0050] In some embodiments, there are multiple first cooling channels 110, which are arranged at intervals along the first direction, the extension direction of each first cooling channel 110 is the same as the second direction, and the interval between two adjacent first cooling channels 110 is 2 mm to 10 mm. Specifically, the smaller the interval between two adjacent first cooling channels 110, the greater the air flow of all first cooling channels 110. Therefore, in this embodiment, the interval between two adjacent first cooling channels 110 is set to 2 mm to 10 mm, which can greatly increase the air flow of all first cooling channels 110 and make the first cooling channels 110 easier to manufacture.

[0051] In this embodiment, the first direction is designated as the length direction of the battery cell 120, and the second direction is designated as the width direction of the battery cell 120, and the two intersect. It is easy to understand that in other possible embodiments, the first direction and the second direction may be different according to different arrangements of the battery cells 120, including but not limited to the first direction being the same as the width direction of the battery cell 120, and the second direction being the same as the length direction of the battery cell 120.

[0052] In order to ensure that the cooling cavity 130 can fully cool the first cooling medium flowing in the second cooling channel 150, in some embodiments, the ratio of the height H1 of the cooling cavity 130 to the height H2 of the second cooling channel 150 is set to be greater than 2. Experiments have shown that when the ratio of the height H1 of the cooling cavity 130 to the height H2 of the second cooling channel 150 is greater than 2, the first cooling medium flowing in the second cooling channel 150 can be fully cooled by the cooling cavity 130.

[0053] The present invention provides a battery pack 100. The battery pack 100 includes a plurality of battery cells 120, and is provided with a first cooling channel 110 and a cooling cavity 130. The first cooling channel 110 is used to circulate a first cooling medium to dissipate heat for the plurality of battery cells 120, and the cooling cavity 130 is used to circulate a second cooling medium to dissipate heat for the plurality of battery cells 120, and the first cooling channel 110 is thermally connected to the cooling cavity 130 to dissipate heat for the first cooling medium through the second cooling medium, and the first cooling medium and the second cooling medium are different. Compared with the double-layer liquid cooling plate method used in the prior art, this embodiment does not require frequent replacement of the cooling medium in the liquid cooling plate, but makes full use of the heat dissipation capacity of the cooling cavity 130, so that the first cooling medium is cooled by the second cooling medium, thereby reducing the material cost. In addition, the first cooling channel 110 does not need to input and output the cooling medium through the pipeline assembly, thereby avoiding the space occupied by the pipeline assembly 140, thereby effectively improving the space utilization of the battery pack 100.

[0054] The embodiment of the present invention further provides a vehicle, which includes the above-mentioned battery pack 100. The vehicle has all the advantages of the above-mentioned battery pack 100, which will not be described in detail here.

[0055] The embodiments of the present invention are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A battery pack, comprising a plurality of battery cells, characterized in that: The battery pack is provided with a first cooling channel and a cooling cavity, the first cooling channel is used for circulating a first cooling medium, the cooling cavity is used for circulating a second cooling medium, and the first cooling medium and the second cooling medium are used for dissipating heat for the plurality of battery cells; The first cooling channel is thermally connected to the cooling cavity to cool the first cooling medium through the second cooling medium, and the first cooling medium and the second cooling medium are different.

2. The battery pack according to claim 1, characterized in that: The first cooling channel is located at the top of the plurality of battery cells, and the first cooling medium is air; the cooling cavity is located at the bottom of the plurality of battery cells, and the second cooling medium is a liquid cooling medium.

3. The battery pack according to claim 2, characterized in that: The battery pack is further provided with a second cooling channel connected to the first cooling channel, and at least a portion of the second cooling channel is located below the cooling cavity and is thermally connected to the cooling cavity.

4. The battery pack according to claim 3, characterized in that: It also includes at least one air guide assembly located on at least one side of the plurality of battery cores, each of the air guide assemblies includes a plurality of air guide members, and the plurality of air guide members are connected between the first cooling channel and the second cooling channel.

5. The battery pack according to claim 4, characterized in that: The second cooling channel includes a main body portion and at least one connecting portion which are interconnected. The main body portion is located below the first cooling channel. The top of each connecting portion protrudes out of the first cooling channel and is connected to the first cooling channel through a plurality of the air guide members of the corresponding air guide assembly.

6. The battery pack according to claim 5, characterized in that: It also includes at least one edge portion, each of which is located on a side of the corresponding connecting portion away from the main body portion, and a top of the edge portion has a height difference with a top wall of the connecting portion.

7. The battery pack according to claim 6, characterized in that: The battery pack includes a top cover and a bottom plate, wherein the top cover is connected to the bottom plate to enclose a mounting cavity for mounting a plurality of the battery cells; wherein the top cover is provided with the first cooling channel, the bottom plate is provided with the second cooling channel and the cooling cavity, and the bottom plate includes at least one edge portion.

8. The battery pack according to claim 5, characterized in that: At least one air guide assembly includes two air guide assemblies located on opposite sides of the plurality of battery cells; the battery pack also includes two air supply assemblies, each of the air supply assemblies is connected to the corresponding air guide assembly, each of the air supply assemblies includes multiple air supply parts, each of the air supply parts is connected to the corresponding air guide part, wherein the air supply directions of the two air supply assemblies are opposite.

9. The battery pack according to claim 8, characterized in that: The gas flow rate of the plurality of air supply members is 20 CFM to 60 CFM, and the spacing between the plurality of air supply members and the first cooling channel in the extension direction of the first cooling channel is 20 mm to 50 mm.

10. The battery pack according to any one of claims 3 to 8, characterized in that: A ratio of a height of the cooling cavity to a height of the second cooling channel is greater than 2.

11. The battery pack according to any one of claims 3 to 8, characterized in that: The battery pack is provided with a plurality of the first cooling channels, and the interval between every two adjacent first cooling channels is 2 mm to 10 mm.

12. A vehicle, characterized in that: A battery pack comprising any one of claims 1-11.

Images