Battery pack and vehicle

Abstract

The utility model provides a battery pack and a vehicle, and relates to the technical field of power batteries. The battery pack provided by the utility model comprises a battery cell module and a liquid cooling plate, wherein the liquid cooling plate is vertically arranged on the side surface of the battery cell module to cool the battery cell module; the liquid cooling plate is provided with a first liquid cooling channel, a second liquid cooling channel and a communicating cavity, the communicating cavity is provided with a liquid inlet and a liquid outlet, the first liquid cooling channel is communicated with the liquid inlet, and the second liquid cooling channel is communicated with the liquid outlet; the communication cavity is located at the end of the liquid cooling plate in the length direction, and the projection of the communication cavity in the thickness direction of the liquid cooling plate is located outside the side face coverage range of the battery cell module. By arranging the first liquid cooling channel, the second liquid cooling channel and the communication cavity, cooling liquid in the liquid cooling plate can cool the battery cell module in the first liquid cooling channel and the second liquid cooling channel respectively, which is equivalent to increase the contact duration of one unit of cooling liquid and the liquid cooling plate; and heat conduction between the liquid cooling plate and the cooling liquid is better realized, so that the cooling effect is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power batteries, in particular to a battery pack and a vehicle. BACKGROUND

[0002] New energy vehicles have been rapidly popularized, and electric new energy vehicles include three core modules of electric drive, battery and electric control. As an important core component, the performance, energy density and safety of the battery pack are increasingly required.

[0003] In the related art, the battery pack of a new energy vehicle usually includes a battery shell, a battery cell module and a liquid cooling plate and the like. The battery cell module is arranged inside the battery shell, and the liquid cooling plate is used to adjust the working temperature of the battery cell module. Cooling liquid is introduced into the liquid cooling plate to cool the battery cell module.

[0004] However, the flow direction of the cooling liquid in the liquid cooling plate is single, and a unit of cooling liquid can only cool the battery cell module once, and the cooling effect is not good. CONTENT OF THE UTILITY MODEL

[0005] Therefore, the present application provides a battery pack and a vehicle to improve the cooling effect of the cooling liquid on the battery cell module.

[0006] To achieve the above-mentioned purpose, the battery pack and the vehicle provided by the present application adopt the following technical solutions:

[0007] In a first aspect, the present application provides a battery pack, comprising a battery cell module and a liquid cooling plate, the liquid cooling plate is vertically arranged on the side of the battery cell module to cool the battery cell module; the liquid cooling plate has a first liquid cooling channel, a second liquid cooling channel and a communication cavity, the communication cavity has a liquid inlet and a liquid outlet, the first liquid cooling channel is in communication with the liquid inlet, and the second liquid cooling channel is in communication with the liquid outlet.

[0008] The communication cavity is located at the end of the length direction of the liquid cooling plate, and the projection of the communication cavity in the thickness direction of the liquid cooling plate is located outside the side coverage range of the battery cell module.

[0009] In a possible implementation manner, the battery pack provided by the present application, the first liquid cooling channel and the second liquid cooling channel both extend along the length direction of the liquid cooling plate, and the first liquid cooling channel is located above the second liquid cooling channel.

[0010] In a possible implementation manner, the battery pack provided by the present application, the communication cavity includes a liquid inlet area and a liquid outlet area, the liquid inlet area is opposite to the liquid inlet, and the liquid outlet area is opposite to the liquid outlet; the size of the liquid inlet area along the length direction of the liquid cooling plate is greater than the size of the liquid outlet area along the length direction of the liquid cooling plate.

[0011] In one possible implementation, the battery pack provided in this application has a width that gradually decreases from the liquid inlet area to the liquid outlet area in at least a portion of the communicating cavity.

[0012] In one possible implementation, the battery pack provided in this application includes a liquid cooling plate comprising a cold plate body and a connecting member, the connecting member being connected to the end of the cold plate body along its length; the cold plate body is used to form the first liquid cooling channel and the second liquid cooling channel, and the connecting member is used to form the connecting cavity; the contour shape of the side of the connecting member connected to the cold plate body matches the edge contour shape of the cell module.

[0013] In one possible implementation, the battery pack provided in this application has at least a portion of the edge of the liquid inlet inclined relative to the vertical direction, so that a flow guiding area is formed between the liquid inlet and the inner wall of the communicating cavity on the side away from the cold plate body; the width of the flow guiding area gradually decreases from the liquid inlet to the liquid outlet.

[0014] In one possible implementation, the battery pack provided in this application has the connecting member covering the outer side of the end of the cold plate body with one edge facing the cold plate body, and welded to the cold plate body.

[0015] In one possible implementation, the battery pack provided in this application includes a plurality of microchannels arranged vertically in both the first liquid cooling channel and the second liquid cooling channel, wherein the number of microchannels in the first liquid cooling channel is greater than the number of microchannels in the second liquid cooling channel.

[0016] In one possible implementation, the battery pack provided in this application has a liquid cooling plate with a refrigerant inlet and a refrigerant outlet. Both the refrigerant inlet and the refrigerant outlet are located at the end of the liquid cooling plate away from the communicating cavity. The refrigerant inlet is connected to the first liquid cooling channel, and the refrigerant outlet is connected to the second liquid cooling channel.

[0017] Secondly, this application provides a vehicle, including a vehicle body and the aforementioned battery pack, wherein the battery pack is disposed on the vehicle body.

[0018] This application provides a battery pack and a vehicle. The battery pack includes a cell module and a liquid cooling plate. The liquid cooling plate is vertically disposed on the side of the cell module to cool the cell module. The liquid cooling plate has a first liquid cooling channel, a second liquid cooling channel, and a connecting cavity. The connecting cavity has an inlet and an outlet. The first liquid cooling channel is connected to the inlet, and the second liquid cooling channel is connected to the outlet. The connecting cavity is located at the end of the liquid cooling plate in the length direction, and the projection of the connecting cavity in the thickness direction of the liquid cooling plate is outside the side coverage area of ​​the cell module. By setting up a first liquid cooling channel, a second liquid cooling channel, and a connecting cavity, the coolant in the liquid cooling plate can sequentially pass through the first liquid cooling channel, the connecting cavity, and the second liquid cooling channel. The coolant in the first liquid cooling channel circulates at the connecting cavity and flows into the second liquid cooling channel. The coolant in the liquid cooling plate can cool the battery cell module in both the first and second liquid cooling channels. Compared with the traditional method where the coolant only flows once in the liquid cooling plate, this method has a better cooling effect. This arrangement is equivalent to increasing the contact time between the coolant and the liquid cooling plate by one unit, which better realizes the heat conduction between the liquid cooling plate and the coolant, thereby improving the cooling effect.

[0019] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0020] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0021] Figure 1 This is a schematic diagram of the structure of a battery pack provided in an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the battery cell module and liquid cooling plate provided in the embodiments of this application;

[0023] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0024] Figure 4 This is a schematic diagram of the structure of the liquid cooling plate provided in the embodiments of this application;

[0025] Figure 5 for Figure 4 A partial structural diagram of the liquid cooling plate in the image;

[0026] Figure 6 An exploded structural diagram of the connecting member and the cold plate body provided in an embodiment of this application;

[0027] Figure 7 for Figure 5 A partial internal structure diagram.

[0028] Explanation of reference numerals in the attached figures:

[0029] 10. Battery pack; 20. Microchannel;

[0030] 100. Battery cell module;

[0031] 200. Liquid cooling plate; 210. Main body of the cooling plate; 220. Connecting component;

[0032] 300. First liquid cooling channel;

[0033] 400. Second liquid cooling channel;

[0034] 500, connecting cavity; 510, liquid inlet; 520, liquid outlet; 530, liquid inlet area; 540, liquid outlet area;

[0035] 600. Refrigerant inlet;

[0036] 700. Refrigerant outlet.

[0037] The accompanying drawings have illustrated specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0039] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0042] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0043] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0044] New energy vehicles have rapidly become widespread, and electric new energy vehicles consist of three core modules: electric drive, battery, and electronic control. As a crucial core component, the battery pack currently faces increasingly stringent requirements regarding its performance, energy density, and safety.

[0045] In related technologies, battery packs for new energy vehicles typically include components such as a battery casing, battery cell modules, and liquid cooling plates. The battery cell modules are housed inside the battery casing, and the liquid cooling plates are used to regulate the operating temperature of the battery cell modules. Coolant is circulated through the liquid cooling plates to cool the battery cell modules. However, in these technologies, the coolant flow within the liquid cooling plates is unidirectional; a single unit of coolant can only cool the battery cell module once, resulting in ineffective cooling.

[0046] In a broad sense, new energy vehicles include all vehicles that use non-petroleum fuels; in a narrow sense, they usually refer to vehicles that use unconventional vehicle fuels.

[0047] Based on the above-mentioned technical problems, this application provides a battery pack and a vehicle. In this technical solution, the battery pack includes a cell module and a liquid cooling plate. The liquid cooling plate is vertically disposed on the side of the cell module to cool the cell module. The liquid cooling plate has a first liquid cooling channel, a second liquid cooling channel, and a connecting cavity. The connecting cavity has an inlet and an outlet. The first liquid cooling channel is connected to the inlet, and the second liquid cooling channel is connected to the outlet. The connecting cavity is located at the end of the liquid cooling plate in the length direction, and the projection of the connecting cavity in the thickness direction of the liquid cooling plate is located outside the side coverage area of ​​the cell module.

[0048] By setting up a first liquid cooling channel, a second liquid cooling channel, and a connecting cavity, the coolant in the liquid cooling plate can sequentially pass through the first liquid cooling channel, the connecting cavity, and the second liquid cooling channel. The coolant in the first liquid cooling channel circulates at the connecting cavity and flows into the second liquid cooling channel. The coolant in the liquid cooling plate can cool the battery cell module in both the first and second liquid cooling channels. Compared with the traditional method where the coolant only flows once in the liquid cooling plate, this method has a better cooling effect. This arrangement is equivalent to increasing the contact time between the coolant and the liquid cooling plate by one unit, which better realizes the heat conduction between the liquid cooling plate and the coolant, thereby improving the cooling effect.

[0049] It should be noted that, Figures 1 to 7 This diagram illustrates a simplified representation of the battery pack and various components within the vehicle. The specific structures of the battery pack and other components in the vehicle are not limited to these examples. Figures 1 to 7 of examples.

[0050] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0051] It should also be noted that the X, Y, and Z arrows shown in the attached diagram are perpendicular to each other in three-dimensional space.

[0052] Reference Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown in the embodiment of this application, a battery pack 10 is provided for a vehicle. The battery pack 10 includes a cell module 100 and a liquid cooling plate 200. The liquid cooling plate 200 is vertically disposed on the side of the cell module 100 to cool the cell module 100. The cell module 100 is related to the relevant technology in the relevant field. The cell module 100 may include multiple cylindrical cells, or it may include multiple blade cells. This embodiment of the application does not limit this.

[0053] Of course, refer to Figure 2As shown, a battery pack 10 may include at least four cell modules 100 and at least two liquid cooling plates 200. Two adjacent cell modules 100 form a group, and the liquid cooling plate 200 is disposed between two grouped cell modules 100. This means that the opposite sides of the liquid cooling plate 200 are used to cool the cell modules 100. The number of cell modules 100 and liquid cooling plates 200 can be selected according to actual design needs in order to increase the energy density of the battery pack 10 and expand the electrical energy of the battery pack 10.

[0054] Reference Figure 5 , Figure 6 and Figure 7 As shown, and in combination Figures 1 to 4 The liquid cooling plate 200 has a first liquid cooling channel 300, a second liquid cooling channel 400 and a connecting cavity 500. The connecting cavity 500 has a liquid inlet 510 and a liquid outlet 520. The first liquid cooling channel 300 is connected to the liquid inlet 510 and the second liquid cooling channel 400 is connected to the liquid outlet 520.

[0055] The connecting cavity 500 is located at the end of the liquid cooling plate 200 along its length, and the projection of the connecting cavity 500 along the thickness of the liquid cooling plate 200 is outside the side coverage area of ​​the battery cell module 100.

[0056] In specific implementation, the length direction of the liquid cooling plate 200 can be referred to as the X direction in the attached figure, and the thickness direction of the liquid cooling plate 200 can be referred to as the Y direction in the attached figure. The connecting cavity 500 is located at the end of the liquid cooling plate 200 along the X direction.

[0057] The projection of the connecting cavity 500 in the Y direction of the liquid cooling plate 200 is located outside the side coverage area of ​​the cell module 100. It should be noted that by setting the projection of the connecting cavity 500 in the Y direction of the liquid cooling plate 200 to be outside the side coverage area of ​​the cell module 100, the liquid cooling plate 200 at the location of the connecting cavity 500 can be prevented from contacting the cell module 100. The connecting cavity 500 can act as a buffer for the coolant, improve the smooth flow of the coolant, and also facilitate the maintenance and debugging of the connecting cavity 500 in the later stage.

[0058] The first liquid cooling channel 300, the second liquid cooling channel 400, and the connecting cavity 500 of the liquid cooling plate 200 are used to introduce coolant. Here, the coolant can be cooling water or cooling oil, which are existing technologies in the relevant fields. This application embodiment does not make specific restrictions on the coolant.

[0059] It should be noted that the main function of the liquid cooling plate 200 is to transfer the heat generated on the battery cell module 100 to the thermal management system through heat conduction, thereby dissipating heat from the battery cell module 100 and eliminating the negative impact of the large amount of heat generated by the battery cell module 100 on the battery cell module 100.

[0060] The thermal management system can be the vehicle's own thermal management system. Thermal management systems are existing technologies in the relevant field, and the thermal management system of the vehicle in this application embodiment is not specifically limited.

[0061] In the above embodiment, by setting up a first liquid cooling channel 300, a second liquid cooling channel 400, and a connecting cavity 500, the coolant in the liquid cooling plate 200 can sequentially pass through the first liquid cooling channel 300, the connecting cavity 500, and the second liquid cooling channel 400. The coolant in the first liquid cooling channel 300 rotates at the connecting cavity 500 and flows into the second liquid cooling channel 400. The coolant in the liquid cooling plate 200 can cool the battery module 100 in the first liquid cooling channel 300 and the second liquid cooling channel 400 respectively. Compared with the traditional method where the coolant only flows once in the liquid cooling plate 200, it has a better cooling effect. The above arrangement is equivalent to increasing the contact time between the coolant and the liquid cooling plate 200 by one unit, which better realizes the heat conduction between the liquid cooling plate 200 and the coolant, thereby improving the cooling effect.

[0062] In one possible implementation, both the first liquid cooling channel 300 and the second liquid cooling channel 400 extend along the length direction of the liquid cooling plate 200, and the first liquid cooling channel 300 is located above the second liquid cooling channel 400. Specifically, the length direction of the liquid cooling plate 200 can be referred to as the X direction in the accompanying drawings, and both the first liquid cooling channel 300 and the second liquid cooling channel 400 extend along the length direction of the liquid cooling plate 200. Figures 5 to 7 Extending in the X direction, in Figures 5 to 7 In the Z direction, the first liquid cooling channel 300 is located above the second liquid cooling channel 400, that is, the coolant enters the liquid cooling plate 200 from the first liquid cooling channel 300 and flows out of the liquid cooling plate 200 from the second liquid cooling channel 400. Due to the existence of gravity, the above arrangement can improve the flow of coolant in the liquid cooling plate 200.

[0063] Reference Figure 5 , Figure 6 and Figure 7 As shown, in one possible implementation, the connecting cavity 500 includes a liquid inlet area 530 and a liquid outlet area 540, with the liquid inlet area 530 opposite to the liquid inlet 510 and the liquid outlet area 540 opposite to the liquid outlet 520; the dimension of the liquid inlet area 530 along the length of the liquid cooling plate 200 is larger than the dimension of the liquid outlet area 540 along the length of the liquid cooling plate 200.

[0064] In the above embodiment, the length of the inlet zone 530 in the X direction is greater than the length of the outlet zone 540 in the X direction. This can buffer the flow and reversal of the coolant, further improve the smoothness of coolant flow, and also ensure sealing.

[0065] In one possible implementation, in the connecting cavity 500, the width of at least a portion of the area gradually decreases from the inlet area 530 to the outlet area 540. This arrangement effectively guides the coolant flowing from the inlet area 530 to the outlet area 540, further improving coolant flowability.

[0066] In one possible implementation, the liquid cooling plate 200 includes a cooling plate body 210 and a connecting member 220. The connecting member 220 is connected to the end of the cooling plate body 210 in the length direction, that is, the connecting member 220 is connected to the end of the cooling plate body 210 in the X direction. The cooling plate body 210 is used to form a first liquid cooling channel 300 and a second liquid cooling channel 400, and the connecting member 220 is used to form a connecting cavity 500.

[0067] The contour shape of the connecting piece 220 on the side connected to the cold plate body 210 matches the edge contour shape of the battery cell module 100.

[0068] In the above embodiment, by setting the cold plate body 210 and the connecting member 220, on the one hand, it is convenient to process the first liquid cooling channel 300 and the second liquid cooling channel 400 in the cold plate body 210, simplify the processing technology and reduce costs. On the other hand, it is convenient to maintain the connecting member 220. Here, when the inside of the cold plate body 210 is blocked, the connecting member 220 can be disassembled to facilitate the unblocking of the first liquid cooling channel 300 and the second liquid cooling channel 400 in the cold plate body 210.

[0069] The contour shape of the connecting member 220 on the side connected to the cold plate body 210 matches the edge contour shape of the battery cell module 100, which can avoid the battery cell module 100 and allow other parts of the cold plate body 210 to contact the battery cell module 100 better, thereby improving the cooling effect.

[0070] In one possible implementation, at least a portion of the edge of the inlet 510 is inclined relative to the vertical direction, so that a flow guiding area is formed between the inlet 510 and the inner wall of the connecting cavity 500 on the side away from the cold plate body 210; the width of the flow guiding area gradually decreases from the inlet 510 toward the outlet 520.

[0071] In the above embodiment, by setting at least a portion of the edge of the liquid inlet 510 to be inclined relative to the vertical direction to form a flow guiding area, it is equivalent to having a certain guiding effect on the coolant in the connecting member 220, thereby improving the flowability of the coolant.

[0072] In one possible implementation, the edge of the connecting member 220 facing the cold plate body 210 covers the outer side of the end of the cold plate body 210 and is welded to the cold plate body 210. By the above arrangement, the connection stability between the connecting member 220 and the cold plate body 210 can be improved, and the sealing between the connecting member 220 and the cold plate body 210 can also be improved, thereby improving the safety of the liquid cooling plate 200.

[0073] Please continue to refer to Figures 5 to 7 As shown, in one possible implementation, both the first liquid cooling channel 300 and the second liquid cooling channel 400 include a plurality of microchannels 20 arranged in a vertical direction, and the number of microchannels 20 in the first liquid cooling channel 300 is greater than the number of microchannels 20 in the second liquid cooling channel 400.

[0074] In the above embodiments, on the one hand, it is easier to fill each microchannel 20 with coolant, further increasing the contact area between coolant and liquid cooling plate 200, indirectly increasing the heat exchange rate between coolant and liquid cooling plate 200, and improving the cooling effect of liquid cooling plate 200 on battery module 100.

[0075] In one possible implementation, refer to Figure 2 and Figure 4 As shown, the liquid cooling plate 200 has a refrigerant inlet 600 and a refrigerant outlet 700. Both the refrigerant inlet 600 and the refrigerant outlet 700 are located at the end of the liquid cooling plate 200 away from the connecting cavity 500. The refrigerant inlet 600 is connected to the first liquid cooling channel 300, and the refrigerant outlet 700 is connected to the second liquid cooling channel 400.

[0076] By setting up a refrigerant inlet 600 and a refrigerant outlet 700, it is possible to easily connect the first liquid cooling channel 300 and the second liquid cooling channel 400 with the thermal management system, and also to improve the sealing performance of the liquid cooling plate 200 to prevent coolant leakage.

[0077] In one possible implementation, this application also provides a vehicle, including a vehicle body and the aforementioned battery pack 10, the battery pack being disposed on the vehicle body. The specific structure of the battery pack 10 has been described above and will not be repeated here. A vehicle equipped with the aforementioned battery pack 10 can improve the cooling effect on the cell module 100.

[0078] The implementation principle of a battery pack 10 and a vehicle according to an embodiment of this application is as follows: The battery pack 10 includes a cell module 100 and a liquid cooling plate 200. The liquid cooling plate 200 is vertically disposed on the side of the cell module 100 to cool the cell module 100. The liquid cooling plate 200 has a first liquid cooling channel 300, a second liquid cooling channel 400 and a connecting cavity 500. The connecting cavity 500 has an inlet 510 and an outlet 520. The first liquid cooling channel 300 is connected to the inlet 510, and the second liquid cooling channel 400 is connected to the outlet 520. The connecting cavity 500 is located at the end of the liquid cooling plate 200 in the length direction, and the projection of the connecting cavity 500 in the thickness direction of the liquid cooling plate 200 is located outside the side coverage area of ​​the cell module 100. By setting up a first liquid cooling channel 300, a second liquid cooling channel 400, and a connecting cavity 500, the coolant in the liquid cooling plate 200 can sequentially pass through the first liquid cooling channel 300, the connecting cavity 500, and the second liquid cooling channel 400. The coolant in the first liquid cooling channel 300 rotates at the connecting cavity 500 and flows into the second liquid cooling channel 400. The coolant in the liquid cooling plate 200 can cool the battery module 100 in the first liquid cooling channel 300 and the second liquid cooling channel 400 respectively. Compared with the traditional method where the coolant only flows once in the liquid cooling plate 200, it has a better cooling effect. The above arrangement is equivalent to increasing the contact time between the coolant and the liquid cooling plate 200 by one unit, which better realizes the heat conduction between the liquid cooling plate 200 and the coolant, thereby improving the cooling effect.

[0079] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0080] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0081] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, The battery pack (10) includes a cell module (100) and a liquid cooling plate (200). The liquid cooling plate (200) is vertically disposed on the side of the cell module (100) to cool the cell module (100). The liquid cooling plate (200) has a first liquid cooling channel (300), a second liquid cooling channel (400), and a connecting cavity (500). The connecting cavity (500) has a liquid inlet (510) and a liquid outlet (520). The first liquid cooling channel (300) is connected to the liquid inlet (510), and the second liquid cooling channel (400) is connected to the liquid outlet (520). The connecting cavity (500) is located at the end of the liquid cooling plate (200) along its length, and the projection of the connecting cavity (500) along the thickness of the liquid cooling plate (200) is outside the side coverage area of ​​the battery cell module (100).

2. The battery pack according to claim 1, characterized in that, Both the first liquid cooling channel (300) and the second liquid cooling channel (400) extend along the length of the liquid cooling plate (200), and the first liquid cooling channel (300) is located above the second liquid cooling channel (400).

3. The battery pack according to claim 1, characterized in that, The communicating cavity (500) includes a liquid inlet area (530) and a liquid outlet area (540). The liquid inlet area (530) is opposite to the liquid inlet (510), and the liquid outlet area (540) is opposite to the liquid outlet (520). The dimension of the liquid inlet area (530) along the length of the liquid cooling plate (200) is greater than the dimension of the liquid outlet area (540) along the length of the liquid cooling plate (200).

4. The battery pack according to claim 3, characterized in that, In the communicating cavity (500), the width of at least a portion of the region gradually decreases from the liquid inlet area (530) to the liquid outlet area (540).

5. The battery pack according to any one of claims 1-4, characterized in that, The liquid cooling plate (200) includes a cold plate body (210) and a connecting member (220), the connecting member (220) being connected to the end of the cold plate body (210) in the length direction; the cold plate body (210) has a first liquid cooling channel (300) and a second liquid cooling channel (400) inside, the connecting member (220) being used to form the connecting cavity (500); the contour shape of the side of the connecting member (220) connected to the cold plate body (210) matches the edge contour shape of the battery cell module (100).

6. The battery pack according to claim 5, characterized in that, At least a portion of the edge of the liquid inlet (510) is inclined relative to the vertical direction, so that a flow guiding area is formed between the liquid inlet (510) and the inner wall of the communicating cavity (500) away from the cold plate body (210); the width of the flow guiding area gradually decreases from the liquid inlet (510) toward the liquid outlet (520).

7. The battery pack according to claim 5, characterized in that, The connecting piece (220) covers the outer side of the end of the cold plate body (210) with one edge facing the cold plate body (210) and is welded to the cold plate body (210).

8. The battery pack according to any one of claims 1-4, characterized in that, Both the first liquid cooling channel (300) and the second liquid cooling channel (400) include a plurality of microchannels (20) arranged in a vertical direction, and the number of microchannels (20) in the first liquid cooling channel (300) is greater than the number of microchannels (20) in the second liquid cooling channel (400).

9. The battery pack according to any one of claims 1-4, characterized in that, The liquid cooling plate (200) has a refrigerant inlet (600) and a refrigerant outlet (700). The refrigerant inlet (600) and the refrigerant outlet (700) are both located at the end of the liquid cooling plate (200) away from the communicating cavity (500). The refrigerant inlet (600) is connected to the first liquid cooling channel (300), and the refrigerant outlet (700) is connected to the second liquid cooling channel (400).

10. A vehicle, characterized in that, It includes a vehicle body and a battery pack (10) as described in any one of claims 1-9, the battery pack (10) being disposed on the vehicle body.

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