Liquid cooling assembly, battery cell module, battery pack and vehicle

Abstract

Disclosed in the present application are a liquid cooling assembly, a battery cell module, a battery pack and a vehicle. The liquid cooling assembly comprises at least one liquid cooling plate, two opposite sides of the liquid cooling plate respectively abutting against battery cell rows; a first liquid cooling channel and a second liquid cooling channel communicated with a liquid outlet end of the first liquid cooling channel are provided in the liquid cooling plate, the first liquid cooling channel and the second liquid cooling channel being arranged parallel to each other; the coolant channel is configured to allow a cooling liquid to flow therethrough, the cooling liquid flowing through the first liquid cooling channel and the second liquid cooling channel sequentially and then flowing out of the liquid cooling plate. The cooling liquid sequentially flows through the first liquid cooling channel and the second liquid cooling channel to cool the battery cell rows; thus, compared with the prior art where a cooling liquid flows through a coolant channel only once to cool battery cell rows once, the present application achieves a better cooling effect. It can be understood that the duration of contact between the cooling liquid and the liquid cooling plate can be increased, which can better achieve heat transfer between the liquid cooling plate and the cooling water, thereby improving the cooling effect of the liquid cooling plate.

Description

Liquid cooling components, cell modules, battery packs and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202423183002.7, filed on December 23, 2024, entitled “A Cell Module, Battery Pack and Vehicle”, the entire contents of which are incorporated herein by reference.

[0002] This application claims priority to Chinese Patent Application No. 202423182993.7, filed on December 23, 2024, entitled “A Battery Pack and Vehicle”, the entire contents of which are incorporated herein by reference.

[0003] This application claims priority to Chinese patent application filed on December 23, 2024, with application number 202423182999.4 and entitled "A Liquid Cooling Component, Cell Module and Battery Pack", the entire contents of which are incorporated herein by reference. Technical Field

[0004] This application relates to, but is not limited to, the field of power battery technology, and particularly to a liquid cooling component, a cell module, a battery pack, and a vehicle. Background Technology

[0005] New energy vehicles have rapidly become widespread, and they consist of three core modules: electric drive, battery, and electronic control. As a crucial component, the battery pack faces increasingly stringent requirements regarding its performance, energy density, and safety.

[0006] The battery pack of a new energy vehicle typically includes components such as a battery casing, battery cell modules, and a liquid cooling plate. The battery cell modules are located inside the battery casing, and the liquid cooling plate is used to regulate the operating temperature of the battery cell modules. Coolant is circulated through the liquid cooling plate to cool the battery cell modules.

[0007] However, the refrigerant channels inside the liquid cooling plate are set in a single direction. When the coolant flows in the refrigerant channels, it can only cool the battery cell module once. The flow direction of the coolant is restricted by the refrigerant channels, resulting in poor cooling effect. Summary of the Invention

[0008] The following is an overview of the subject matter described in detail herein. This overview is not intended to limit the scope of the claims.

[0009] This application provides a liquid cooling component, a cell module, a battery pack, and a vehicle to solve the problem of poor cooling effect of current liquid cooling plates.

[0010] In a first aspect, this application provides a liquid cooling assembly, which includes at least one liquid cooling plate;

[0011] The liquid cooling plate is configured to abut against the battery cell array on both opposite sides.

[0012] The liquid cooling plate has a refrigerant channel inside;

[0013] The refrigerant channel includes a first liquid cooling channel and a second liquid cooling channel connected to the liquid outlet end of the first liquid cooling channel; the first liquid cooling channel and the second liquid cooling channel are arranged parallel to each other;

[0014] The refrigerant channel is configured to allow coolant to pass through, and the coolant flows out of the liquid cooling plate sequentially through the first liquid cooling channel and the second liquid cooling channel.

[0015] In one possible implementation, the cross-sectional area of ​​the first liquid cooling channel is larger than the cross-sectional area of ​​the second liquid cooling channel.

[0016] In one possible implementation, both the first liquid cooling channel and the second liquid cooling channel extend along the length direction of the liquid cooling plate;

[0017] The first liquid cooling channel is located above the second liquid cooling channel.

[0018] In one possible implementation, the liquid cooling assembly further includes a connecting member disposed at one end of the liquid cooling plate, the connecting member having a communicating cavity within it;

[0019] The liquid outlet of the first liquid cooling channel is connected to the liquid inlet of the second liquid cooling channel through the connecting cavity, and / or 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 set to be located outside the side coverage area of ​​the cell module.

[0020] In one possible implementation, the communicating cavity has a liquid inlet and a liquid outlet, the first liquid cooling channel is connected to the liquid inlet, and the second liquid cooling channel is connected to the liquid outlet; the communicating cavity includes a liquid inlet area and a liquid outlet area, the liquid inlet area being opposite to the liquid inlet and the liquid outlet area being opposite to the liquid outlet.

[0021] The dimension of the liquid inlet area along the length of the liquid cooling plate is greater than the dimension of the liquid outlet area along the length of the liquid cooling plate, and / or, in the communicating cavity, the width of at least a portion of the area gradually decreases from the liquid inlet area to the liquid outlet area.

[0022] In one possible implementation, at least a portion of the edge of the liquid inlet is inclined relative to the vertical direction, so that a flow guiding zone is formed between the liquid inlet and the inner wall of the communicating cavity on the side away from the liquid cooling plate; the width of the flow guiding zone gradually decreases from the liquid inlet toward the liquid outlet.

[0023] In one possible implementation, the connecting member has its edge facing the liquid cooling plate covering the outer side of the end of the liquid cooling plate and is welded to the liquid cooling plate.

[0024] In one possible implementation, a clearance notch is provided on the side wall of the connecting member, the clearance notch being configured to avoid the battery cell array, so that the battery cell array at the clearance notch abuts against the side wall of the liquid cooling plate;

[0025] And / or, the profile shape of the connecting member on the side connected to the liquid cooling plate is set to match the edge profile shape of the cell array.

[0026] In one possible implementation, both the first liquid cooling channel and the second liquid cooling channel include multiple sub-channels arranged vertically and parallel to each other.

[0027] Both the sub-channels of the first liquid cooling channel and the sub-channels of the second liquid cooling channel are connected to the communicating cavity, and / or the number of sub-channels of the first liquid cooling channel is greater than the number of sub-channels of the second liquid cooling channel.

[0028] In one possible implementation, the liquid cooling assembly further includes a refrigerant inlet and a refrigerant outlet;

[0029] The refrigerant inlet is connected to the inlet end of the first liquid cooling channel, and the refrigerant outlet is connected to the outlet end of the second liquid cooling channel.

[0030] The liquid inlet end of the first liquid cooling channel and the liquid outlet end of the second liquid cooling channel are located at the same end of the liquid cooling plate;

[0031] The refrigerant inlet and the refrigerant outlet are configured to be connected to the thermal management system so that the coolant enters the first liquid cooling channel through the refrigerant inlet and flows out of the second liquid cooling channel from the refrigerant outlet.

[0032] In one possible implementation, the refrigerant inlet and the refrigerant outlet are respectively located at the lower and upper parts of the end of the liquid cooling plate, or the first liquid cooling channel is located below the second liquid cooling channel.

[0033] In one possible implementation, the refrigerant inlet component includes an inlet valve seat and a refrigerant inlet pipe;

[0034] The liquid inlet valve seat is connected to one end of the refrigerant channel, the liquid inlet valve seat is disposed on one side of the cold plate, and one end of the refrigerant inlet pipe is connected to the liquid inlet valve seat;

[0035] The refrigerant outlet component includes an outlet valve seat and a refrigerant outlet pipe. The outlet valve seat is connected to the other end of the refrigerant channel. The outlet valve seat is located on the other side of the cold plate. One end of the refrigerant outlet pipe is connected to the outlet valve seat.

[0036] In one possible implementation, the liquid cooling assembly further includes at least two connectors;

[0037] The connecting seat is connected to the side wall of the liquid cooling plate;

[0038] The refrigerant inlet and refrigerant outlet are respectively connected to the two connecting seats one by one;

[0039] The refrigerant inlet is connected to the first liquid cooling channel via one of the connectors, and the refrigerant outlet is connected to the second liquid cooling channel via the other connector.

[0040] Secondly, this application provides a battery cell module, including two battery cell assemblies, wherein the battery cell assembly includes at least two layers of battery cell rows stacked alternately, and the battery cell rows include a plurality of cylindrical battery cells arranged horizontally in sequence;

[0041] As described above, the liquid cooling assembly is disposed between the two cell assemblies and abuts against the cylindrical cell.

[0042] In one possible implementation, a plurality of the cylindrical cells are arranged along the length of the liquid cooling assembly.

[0043] In one possible implementation, the battery cell module further includes a frame having a mounting cavity, in which both battery cell assemblies are disposed;

[0044] The width direction of the mounting cavity is consistent with the length direction of each cylindrical battery cell;

[0045] The width of the mounting cavity is set to be along the length of the vehicle.

[0046] In one possible implementation, the cell assembly further includes a support plate;

[0047] The support plate is disposed between two battery cell rows that are stacked in an alternating manner.

[0048] The support plate has limiting grooves on its opposite sides that match the sides of the battery cell array.

[0049] The battery cell array is correspondingly secured within the limiting groove.

[0050] In one possible implementation, the support plate is a cold plate.

[0051] Thirdly, this application provides a battery pack, including a frame and at least two cell modules as described above disposed within the frame.

[0052] Fourthly, this application provides a vehicle comprising a vehicle body and a battery cell module as described above disposed on the vehicle body, and / or, a battery pack as described above; the vehicle body is connected to the battery pack.

[0053] This application provides a liquid cooling assembly, a cell module, a battery pack, and a vehicle. The liquid cooling assembly includes at least one liquid cooling plate. Opposite sides of the liquid cooling plate are respectively configured to abut against the cell array. A refrigerant channel is formed within the liquid cooling plate. The refrigerant channel includes a first liquid cooling channel and a second liquid cooling channel connected to the outlet end of the first liquid cooling channel. The first and second liquid cooling channels are arranged parallel to each other. Coolant is introduced into the refrigerant channel, and the coolant flows out of the liquid cooling plate sequentially through the first and second liquid cooling channels. After coolant is introduced into the refrigerant channel of the liquid cooling plate, the coolant sequentially cools the cell array through the first and second liquid cooling channels. Compared to traditional methods where the coolant only flows through the refrigerant channel once to cool the cell array, this provides a better cooling effect. It is understood that this increases the contact time between the coolant and the liquid cooling plate, better realizing heat conduction between the liquid cooling plate and the cooling water, thereby improving the cooling effect of the liquid cooling plate.

[0054] 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 the electric drive system and vehicle provided by this application can solve, other technical features included 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

[0055] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0056] Figure 1 is a schematic diagram of the battery pack provided in an embodiment of this application;

[0057] Figure 2 is a partial exploded structure diagram of Figure 1;

[0058] Figure 3 is a partial structural schematic diagram of a cell module and battery pack provided in an embodiment of this application;

[0059] Figure 4 is a partial structural diagram of Figure 3;

[0060] Figure 5 is a partial structural schematic diagram of the battery cell module in Figure 4;

[0061] Figure 6 is a partial structural schematic diagram of the battery cell module provided in an embodiment of this application;

[0062] Figure 7 is an enlarged structural diagram of part A in Figure 6;

[0063] Figure 8 is a schematic diagram of the liquid cooling assembly provided in an embodiment of this application;

[0064] Figure 9 is a schematic diagram of the structure of the liquid cooling plate in the liquid cooling assembly provided in the embodiment of this application;

[0065] Figure 10 is a partial internal structure diagram of the liquid cooling assembly provided in an embodiment of this application;

[0066] Figure 11 is a partial internal structure diagram of the liquid cooling plate provided in an embodiment of this application;

[0067] Figure 12 is a partial structural schematic diagram of the liquid cooling assembly provided in an embodiment of this application;

[0068] Figure 13 is a partial structural schematic diagram of the liquid cooling plate and connecting member provided in an embodiment of this application;

[0069] Figure 14 is an exploded structural diagram of the liquid cooling plate and connecting parts in Figure 13;

[0070] Figure 15 is a schematic diagram of part of the internal structure in Figure 13;

[0071] Figure 16 is a partial exploded structure diagram of the battery cell assembly provided in an embodiment of this application;

[0072] Figure 17 is a schematic diagram of the cylindrical battery cell provided in an embodiment of this application.

[0073] Explanation of reference numerals in the attached drawings: 10, Sub-channel; 20, Cell module; 100, Liquid cooling plate; 101, Refrigerant channel; 1011, First liquid cooling channel; 1012, Second liquid cooling channel; 200, Cell assembly; 210, Cell array; 211, Cylindrical cell; 220, Support plate; 221, Limiting groove; 230, Insulating strip; 300, Frame; 400, Refrigerant inlet component; 410, Inlet valve seat; 420, Refrigerant inlet pipe; 800, Connecting component; 810, Clearance notch; 500, Connecting cavity; 510, Inlet; 520, Outlet; 530, Inlet area; 540, Outlet area; 600, Connecting seat; 700, Frame; 900, Refrigerant outlet component; 910, Outlet valve seat; 920, Refrigerant outlet pipe. Detailed Implementation

[0074] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0075] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this application and are not intended to limit the scope of protection of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0076] Secondly, it should be noted that in the description of this application, the terms "front", "rear", "left", "right", "up", "down", "inner", "outer", etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0077] Furthermore, it should be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to the internal connection 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.

[0078] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0079] New energy vehicles aim to provide a more environmentally friendly and energy-efficient mode of transportation through advanced vehicle power control and drive technologies. These vehicles no longer rely on traditional gasoline or diesel fuels, but instead use electricity, hydrogen, or other unconventional energy sources as their primary power source. In a broad sense, new energy vehicles include all vehicles using non-petroleum fuels; in a narrower sense, they typically refer to vehicles using unconventional vehicle fuels. Among these, electric new energy vehicles are particularly widespread, and cylindrical battery cells are commonly used as the power source for them due to their advantages such as small size, stable structure, and better absorption of expansion forces.

[0080] In the process of assembling cylindrical cells into a battery pack, multiple cylindrical cells are first assembled into a cell array, then the cell arrays are assembled together with a liquid cooling plate into a cell module, and finally the cell modules are assembled into the battery pack. The liquid cooling plate is equipped with refrigerant channels, and coolant is circulated into the refrigerant channels to cool the cell arrays.

[0081] In conventional liquid cooling plates, the refrigerant channels have a single direction. When the coolant flows in the conventional refrigerant channels, it can only cool the battery cell array once. The flow path is restricted by the refrigerant channels, resulting in poor performance.

[0082] To address the aforementioned issues, this application provides a liquid cooling assembly, a cell module, a battery pack, and a vehicle. The liquid cooling assembly includes at least one liquid cooling plate. Opposite sides of the liquid cooling plate are respectively configured to abut against the cell array. A refrigerant channel is formed within the liquid cooling plate. The refrigerant channel includes a first liquid cooling channel and a second liquid cooling channel connected to the outlet end of the first liquid cooling channel. The first and second liquid cooling channels are arranged parallel to each other. Coolant is introduced into the refrigerant channel, and the coolant flows out of the liquid cooling plate sequentially through the first and second liquid cooling channels. After coolant is introduced into the refrigerant channel of the liquid cooling plate, the coolant sequentially cools the cell array through the first and second liquid cooling channels. Compared to traditional methods where the coolant only flows through the refrigerant channel once to cool the cell array, this provides a better cooling effect. It is understood that this increases the contact time between the coolant and the liquid cooling plate, better realizing heat conduction between the liquid cooling plate and the cooling water, thereby improving the cooling effect of the liquid cooling plate.

[0083] The technical solutions of the embodiments of this application will be described in detail below through specific examples.

[0084] Referring to Figures 1 to 11, this application embodiment provides a liquid cooling assembly for cooling a battery cell array 210. It should be noted that the battery cell array 210 includes multiple cylindrical battery cells 211 as shown in Figure 17. The cylindrical battery cells 211 have high energy density, a stable structure, and their sides are integrally formed, providing good sealing and reducing potential safety hazards. The liquid cooling assembly includes at least one liquid cooling plate 100. Both opposite sides of the liquid cooling plate 100 are configured to abut against the ends of the battery cell array 210. A refrigerant channel 101 is formed within the liquid cooling plate 100.

[0085] The refrigerant channel 101 includes a first liquid cooling channel 1011 and a second liquid cooling channel 1012 connected to the liquid outlet end of the first liquid cooling channel 1011. The first liquid cooling channel 1011 and the second liquid cooling channel 1012 are arranged parallel to each other. Specifically, in one possible implementation, the first liquid cooling channel 1011 is located above the second liquid cooling channel 1012. In another possible implementation, the first liquid cooling channel 1011 may also be located below the second liquid cooling channel 1012.

[0086] The cross-sectional area of ​​the first liquid cooling channel 1011 is larger than the cross-sectional area of ​​the second liquid cooling channel 1012.

[0087] The refrigerant channel 101 is used to introduce coolant, and the coolant flows out of the liquid cooling plate 100 through the first liquid cooling channel 1011 and the second liquid cooling channel 1012 in sequence.

[0088] It should be noted that the main function of the liquid cooling plate 100 is to transfer the heat generated on the cell busbar 210 to the thermal management system through heat conduction, thereby dissipating heat from the cell busbar 210 and eliminating the negative impact of the large amount of heat generated by the cell busbar 210 on the cell busbar 210.

[0089] The thermal management system can be the vehicle's own thermal management system, and the thermal management system of the vehicle in this application embodiment is not specifically limited.

[0090] In the above embodiment, by setting the cross-sectional area of ​​the first liquid cooling channel 1011 to be larger than that of the second liquid cooling channel 1012, after the coolant is introduced into the refrigerant channel 101 of the liquid cooling plate 100, the coolant in the first liquid cooling channel 1011 has a larger contact area with the liquid cooling plate 100. It is understood that when the coolant initially enters the first liquid cooling channel 1011, it has a lower temperature than the coolant in the second liquid cooling channel 1012. Of course, the coolant at a lower temperature has a better cooling effect on the cell array 210. The above arrangement is equivalent to making the coolant at a lower temperature have a larger contact area with the liquid cooling plate 100. Through the heat exchange between the liquid cooling plate 100 and the coolant, the liquid cooling plate 100 cools the cell array 210, thereby improving the cooling effect of the coolant on the cell array 210.

[0091] In practice, the sides of two adjacent cylindrical cells 211 are in close contact. It should be noted that the cylindrical cell 211 has two circular end faces and cylindrical side faces. Multiple cylindrical cells 211 are arranged along the length of the liquid cooling plate 100, and the end faces of the cylindrical cells 211 abut against the liquid cooling plate 100. The axis of the cylindrical battery is perpendicular to the plane of the liquid cooling plate 100, and the cylindrical side faces of two adjacent cylindrical cells 211 are in close contact.

[0092] By adopting the above configuration, on the one hand, the space inside the battery pack can be fully utilized to increase the energy density; on the other hand, more cylindrical cells 211 can be cooled through the liquid cooling plate 100, further improving the heat dissipation efficiency of the liquid cooling plate 100.

[0093] Of course, both sides of the liquid cooling plate 100 are used to abut against the battery cell array 210, which means that battery cell arrays 210 are provided on both opposite sides of the liquid cooling plate 100. The number of battery cell arrays 210 on each side can be one or more, depending on the design requirements. When multiple battery cell arrays 210 are provided on one side of the liquid cooling plate 100, one liquid cooling plate 100 can simultaneously dissipate heat from multiple battery cell arrays 210 located on both sides of the liquid cooling plate 100, further improving the cooling efficiency of the liquid cooling plate 100 for the battery cell arrays 210.

[0094] In this embodiment, the first liquid cooling channel 1011 and the second liquid cooling channel 1012 are arranged parallel to each other, and both the first liquid cooling channel 1011 and the second liquid cooling channel 1012 extend along the length direction of the liquid cooling plate 100. The first liquid cooling channel 1011 and the second liquid cooling channel 1012 extending along the length direction of the liquid cooling plate 100 and being arranged parallel to each other enable the first liquid cooling channel 1011 and the second liquid cooling channel 1012 to fully utilize the internal space of the liquid cooling plate 100, thereby achieving greater contact between the liquid cooling plate 100 and the coolant, increasing the contact area between the coolant and the liquid cooling plate 100, and thus improving the heat exchange rate between the liquid cooling plate 100 and the coolant.

[0095] In one possible implementation, the liquid cooling assembly further includes a connecting member 800, which is disposed at one end of the liquid cooling plate 100. The connecting member 800 has a connecting cavity, and the liquid outlet of the first liquid cooling channel 1011 is connected to the liquid inlet of the second liquid cooling channel 1012 through the connecting cavity.

[0096] It should be noted that the liquid outlet of the first liquid cooling channel 1011 is connected to the liquid inlet of the second liquid cooling channel 1012. When the liquid outlet of the first liquid cooling channel 1011 and the liquid inlet of the second liquid cooling channel 1012 are connected on the same liquid cooling plate 100, part of the internal space of the liquid cooling plate 100 is occupied to open a channel for connecting the first liquid cooling channel 1011 and the second liquid cooling channel 1012. Moreover, the processing is difficult. After setting the above channel, the effective cooling area of ​​the liquid cooling plate 100 for the cell array 210 will be reduced. By setting the connecting member 800, the connecting cavity inside the connecting member 800 can be used to connect the first liquid cooling channel 1011 and the second liquid cooling channel 1012. The connecting member 800 is set at one end of the liquid cooling plate 100. Here, the connecting member 800 can be welded to the liquid cooling plate 100, or it can be a detachable connection that meets the sealing requirements. In short, by setting the connecting member 800, on the one hand, the processing difficulty inside the liquid cooling plate 100 can be reduced, which helps to reduce the manufacturing cost. On the other hand, it does not require occupying part of the internal space of the liquid cooling plate 100, so that more of the liquid cooling plate 100 can be used to cool the cell array 210, thereby improving the cooling efficiency of the liquid cooling plate 100 on the cell array 210.

[0097] Furthermore, both the first liquid cooling channel 1011 and the second liquid cooling channel 1012 include multiple sub-channels 10 arranged in parallel with each other, and the sub-channels 10 of the first liquid cooling channel 1011 and the sub-channels 10 of the second liquid cooling channel 1012 are connected to the communicating cavity.

[0098] Furthermore, the number of sub-channels 10 in the first liquid cooling channel 1011 is greater than the number of sub-channels 10 in the second liquid cooling channel 1012, and the sum of the cross-sectional areas of the sub-channels 10 in the first liquid cooling channel 1011 is equal to the cross-sectional area of ​​the first liquid cooling channel 1011, while the sum of the cross-sectional areas of the sub-channels 10 in the second liquid cooling channel 1012 is equal to the cross-sectional area of ​​the second liquid cooling channel 1012.

[0099] By setting up sub-channels 10, it is easier to fill each sub-channel 10 with coolant, further increasing the contact area between the coolant and the liquid cooling plate 100, indirectly increasing the heat exchange rate between the coolant and the liquid cooling plate 100, and improving the cooling effect of the liquid cooling plate 100 on the cell array 210.

[0100] In one approach, the first liquid cooling channel 1011 needs to be filled with coolant. However, due to gravity or pressure factors, the upper space of the first liquid cooling channel 1011 is difficult to fill completely. By setting up sub-channels 10, coolant can be introduced into each sub-channel 10 separately, and the sub-channels 10 do not affect each other.

[0101] In other feasible embodiments, a clearance notch 810 is provided on the side wall of the connecting member 800. The clearance notch 810 is used to avoid the battery cell array 210 so that the battery cell array 210 at the clearance notch 810 abuts against the side wall of the liquid cooling plate 100.

[0102] The connecting member 800 is disposed at one end of the liquid cooling plate 100. By setting an avoidance notch 810 on the connecting member 800, the cylindrical cell 211 located at the avoidance notch 810 near the connecting member 800 can abut against the side wall of the liquid cooling plate 100, which can increase the design quantity threshold of the cylindrical cell 211, expand the capacity of the cell array 210, and thus expand the battery pack capacity.

[0103] In addition, in the above embodiments, coolant is introduced into the refrigerant channel 101. Of course, this coolant only refers to a refrigerant liquid that can realize heat exchange. Refrigerant oil or other forms of refrigerant liquid can be used as needed. This application embodiment does not limit this. When using coolant, the coolant has good heat dissipation performance and high heat exchange efficiency, which can improve heat dissipation efficiency. Furthermore, the coolant has good environmental performance, is simple to maintain, and has high flexibility.

[0104] Referring to Figures 1, 2, 4 and 6, in one possible embodiment, the liquid cooling assembly further includes a refrigerant inlet 400 and a refrigerant outlet 900.

[0105] The refrigerant inlet 400 is connected to the inlet end of the first liquid cooling channel 1011, and the refrigerant outlet 900 is connected to the outlet end of the second liquid cooling channel 1012.

[0106] The liquid inlet end of the first liquid cooling channel 1011 and the liquid outlet end of the second liquid cooling channel 1012 are located at the same end of the liquid cooling plate 100.

[0107] The refrigerant inlet 400 and refrigerant outlet 900 are used to connect to the thermal management system so that the coolant enters the first liquid cooling channel 1011 through the refrigerant inlet 400 and flows out of the second liquid cooling channel 1012 from the refrigerant outlet 900.

[0108] By setting the liquid inlet end of the first liquid cooling channel 1011 and the liquid outlet end of the second liquid cooling channel 1012 at the same end of the liquid cooling plate 100, the refrigerant inlet component 400 and the refrigerant outlet component 900 are both set at the same end of the liquid cooling plate 100. This allows the refrigerant inlet component 400 and the refrigerant outlet component 900 to be installed on the same side of the cell module 20, thereby reducing the space occupied by the refrigerant inlet component 400, the refrigerant outlet component 900 and the liquid cooling plate 100 in the horizontal direction, and further increasing the energy density of the battery pack.

[0109] In practice, the refrigerant inlet 400 and the refrigerant outlet 900 are respectively located at the upper and lower parts of the end of the liquid cooling plate 100, so that the refrigerant inlet 400 and the refrigerant outlet 900 utilize the space at the upper and lower parts of the liquid cooling plate 100, thereby further reducing the space occupied by the refrigerant inlet 400 and the refrigerant outlet 900.

[0110] The refrigerant inlet 400 and the refrigerant outlet 900 are respectively located on opposite sides of the liquid cooling plate 100. It can be understood that by setting the refrigerant inlet 400 and the refrigerant outlet 900 on opposite sides of the liquid cooling plate 100, the space on both sides of the liquid cooling plate 100 can be fully utilized and the space utilization rate can be improved.

[0111] In one possible implementation, the liquid cooling assembly also includes at least two connectors 600.

[0112] The connecting seat 600 is connected to the side wall of the liquid cooling plate 100.

[0113] The refrigerant inlet 400 and the refrigerant outlet 900 are respectively connected to the two connectors 600.

[0114] The refrigerant inlet 400 is connected to the first liquid cooling channel 1011 through one of the connectors 600, and the refrigerant outlet 900 is connected to the second liquid cooling channel 1012 through the other connector 600.

[0115] The refrigerant inlet component 400 includes an inlet valve seat 410 and a refrigerant inlet pipe 420.

[0116] The liquid inlet valve seat 410 is connected to the liquid inlet end of the first liquid cooling channel 1011. The liquid inlet valve seat 410 is located on one side of the liquid cooling plate 100, and one end of the refrigerant inlet pipe 420 is connected to the liquid inlet valve seat 410.

[0117] The refrigerant outlet component 900 includes an outlet valve seat 910 and a refrigerant outlet pipe 920.

[0118] The liquid outlet valve seat 910 is connected to the liquid outlet end of the second liquid cooling channel 1012. The liquid outlet valve seat 910 is located on the other side of the liquid cooling plate 100. One end of the refrigerant outlet pipe 920 is connected to the liquid outlet valve seat 910.

[0119] Both the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920 are used to connect to the thermal management system.

[0120] In the above embodiments, the use of an inlet valve seat 410 and a refrigerant inlet pipe 420 facilitates the connection between the refrigerant inlet pipe 420 and the first liquid cooling channel 1011 within the liquid cooling plate 100 via the inlet valve seat 410. Furthermore, the inlet valve seat 410 enhances the fixing strength of the refrigerant inlet pipe 420, preventing it from detaching from the liquid cooling plate 100 during vehicle vibration. Similarly, the use of an outlet valve seat 910 and a refrigerant outlet pipe 920 facilitates the connection between the refrigerant outlet pipe 920 and the refrigerant channel 101 within the liquid cooling plate 100 via the outlet valve seat 910. The outlet valve seat 910 also enhances the fixing strength of the refrigerant outlet pipe 920, preventing it from detaching from the liquid cooling plate 100 during vehicle vibration.

[0121] The refrigerant inlet 400 and the refrigerant outlet 900 are respectively connected to the two connecting seats 600 one by one, which can be done by bolting the refrigerant inlet 400 and the refrigerant outlet 900 to their respective connecting seats 600.

[0122] In practice, the connector 600 is welded to the side wall of the liquid cooling plate 100, and the connector 600 has a channel. The refrigerant inlet pipe 420 is connected to the first liquid cooling channel 1011 through one of the connectors 600, and the refrigerant outlet pipe 920 is connected to the second liquid cooling channel 1012 through the other connector 600. This helps to improve the installation strength and stability of the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920.

[0123] In one possible implementation, the liquid cooling plate 100 also has a sensor (not shown in the figure), which is disposed on at least one of the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920. In this embodiment, the sensor is configured to detect temperature. In other embodiments, the sensor may also be configured to detect the coolant flow rate, or to detect leaks, etc. The number of sensors can be adjusted as needed, for example, sensors can be disposed at different positions on the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920.

[0124] By adopting the above technical solution and by setting up sensors, it is convenient to detect the temperature or other characteristic factors in the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920, thereby facilitating timely adjustment of the coolant flow rate and indirectly improving the heat dissipation efficiency of the liquid cooling plate 100 on the cell array 210.

[0125] This application embodiment also provides a battery cell module 20. Referring to Figures 1 and 2, the battery cell module 20 includes at least one battery cell array 210 and the aforementioned liquid cooling component that abuts against the end of the battery cell array 210.

[0126] The cooling efficiency of the battery cell module 20 can be improved by incorporating the aforementioned liquid cooling components.

[0127] In one possible implementation, this application embodiment also provides a battery pack, including a frame 700 and at least one of the aforementioned cell modules 20 disposed within the frame 700.

[0128] In one possible embodiment, the battery pack includes a cell module 20 and a liquid cooling plate 100. The liquid cooling plate 100 is vertically disposed on the side of the cell module 20 to cool the cell module 20. The cell module 20 may include a plurality of cylindrical cells 211, or it may include a plurality of blade cells. This application embodiment does not limit this.

[0129] Of course, as shown in Figures 3 and 4, a battery pack may include at least four cell modules 20 and at least two liquid cooling plates 100. Two adjacent cell modules 20 form a group, and the liquid cooling plate 100 is disposed between two groups of cell modules 20. This means that the opposite sides of a liquid cooling plate 100 are used to cool the cell modules 20. The number of cell modules 20 and liquid cooling plates 100 can be selected according to actual design needs in order to increase the energy density of the battery pack and expand the power of the battery pack.

[0130] The liquid cooling plate 100 has a first liquid cooling channel 1011, a second liquid cooling channel 1012 and a connecting cavity 500. The connecting cavity 500 has a liquid inlet 510 and a liquid outlet 520. The first liquid cooling channel 1011 is connected to the liquid inlet 510 and the second liquid cooling channel 1012 is connected to the liquid outlet 520.

[0131] The connecting cavity 500 is located at the end of the liquid cooling plate 100 along its length, and the projection of the connecting cavity 500 along the thickness of the liquid cooling plate 100 is outside the side coverage area of ​​the cell module 20.

[0132] In specific implementation, the length direction of the liquid cooling plate 100 can be referred to as the X direction in Figure 6, and the thickness direction of the liquid cooling plate 100 can be referred to as the Y direction in the figure. The connecting cavity 500 is located at the end of the liquid cooling plate 100 along the X direction. The X, Y, and Z arrows shown in the figure are perpendicular to each other in three-dimensional space.

[0133] The projection of the connecting cavity 500 in the Y direction of the liquid cooling plate 100 is located outside the side coverage area of ​​the cell module 20. It should be noted that by setting the projection of the connecting cavity 500 in the Y direction of the liquid cooling plate 100 to be outside the side coverage area of ​​the cell module 20, the liquid cooling plate 100 at the location of the connecting cavity 500 can be prevented from contacting the cell module 20. 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.

[0134] The first liquid cooling channel 1011, the second liquid cooling channel 1012, and the connecting cavity 500 of the liquid cooling plate 100 are used to introduce coolant. Here, the coolant can be either cooling water or cooling oil.

[0135] It should be noted that the main function of the liquid cooling plate 100 is to transfer the heat generated on the battery cell module 20 to the thermal management system through heat conduction, thereby dissipating heat from the battery cell module 20 and eliminating the negative impact of the large amount of heat generated by the battery cell module 20 on the battery cell module 20.

[0136] The thermal management system can be the vehicle's own thermal management system, and the thermal management system of the vehicle in this application embodiment is not specifically limited.

[0137] In the above embodiment, by setting up a first liquid cooling channel 1011, a second liquid cooling channel 1012, and a connecting cavity 500, the coolant in the liquid cooling plate 100 can sequentially pass through the first liquid cooling channel 1011, the connecting cavity 500, and the second liquid cooling channel 1012. The coolant in the first liquid cooling channel 1011 rotates at the connecting cavity 500 and flows into the second liquid cooling channel 1012. The coolant in the liquid cooling plate 100 can cool the battery module 20 in the first liquid cooling channel 1011 and the second liquid cooling channel 1012 respectively. Compared with the traditional method where the coolant only flows once in the liquid cooling plate 100, it has a better cooling effect. The above arrangement is equivalent to increasing the contact time between the coolant and the liquid cooling plate 100 by one unit, which better realizes the heat conduction between the liquid cooling plate 100 and the coolant, thereby improving the cooling effect.

[0138] In one possible implementation, both the first liquid cooling channel 1011 and the second liquid cooling channel 1012 extend along the length of the liquid cooling plate 100, with the first liquid cooling channel 1011 located above the second liquid cooling channel 1012. Specifically, the length of the liquid cooling plate 100 can be referred to as the X direction in the attached figure. Both the first liquid cooling channel 1011 and the second liquid cooling channel 1012 extend along the X direction in the figure. In the Z direction, the first liquid cooling channel 1011 is located above the second liquid cooling channel 1012. That is, the coolant enters the liquid cooling plate 100 from the first liquid cooling channel 1011 and flows out of the liquid cooling plate 100 from the second liquid cooling channel 1012. Due to the existence of gravity, the above arrangement can improve the smoothness of coolant flow within the liquid cooling plate 100.

[0139] 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 100 is larger than the dimension of the liquid outlet area 540 along the length of the liquid cooling plate 100.

[0140] 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.

[0141] 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.

[0142] In one possible implementation, a connecting member 800 is also included, which is connected to the end of the liquid cooling plate 100 in the length direction, that is, the connecting member 800 is connected to the end of the liquid cooling plate 100 in the X direction; the liquid cooling plate 100 is used to form a first liquid cooling channel 1011 and a second liquid cooling channel 1012, and the connecting member 800 is used to form a connecting cavity 500.

[0143] The contour shape of the side of the connecting piece 800 that connects to the liquid cooling plate 100 matches the edge contour shape of the battery cell module 20.

[0144] In the above embodiments, by providing the liquid cooling plate 100 and the connecting member 800, on the one hand, it is convenient to process the first liquid cooling channel 1011 and the second liquid cooling channel 1012 inside the liquid cooling plate 100, simplifying the processing technology and reducing costs. On the other hand, it is convenient to maintain the connecting member 800. Here, when the liquid cooling plate 100 is blocked, the connecting member 800 can be disassembled to facilitate unblocking the first liquid cooling channel 1011 and the second liquid cooling channel 1012 inside the liquid cooling plate 100.

[0145] The contour shape of the connecting member 800 on the side connected to the liquid cooling plate 100 matches the edge contour shape of the battery cell module 20, which can avoid the battery cell module 20 and allow other parts of the liquid cooling plate 100 to contact the battery cell module 20 better, thereby improving the cooling effect.

[0146] In one possible implementation, 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 connecting cavity 500 on the side away from the liquid cooling plate 100; the width of the flow guiding area gradually decreases from the liquid inlet 510 toward the liquid outlet 520.

[0147] 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 800, thereby improving the flowability of the coolant.

[0148] In one possible implementation, the edge of the connecting member 800 facing the liquid cooling plate 100 covers the outer side of the end of the liquid cooling plate 100 and is welded to the liquid cooling plate 100. By the above arrangement, the connection stability between the connecting member 800 and the liquid cooling plate 100 can be improved, and the sealing between the connecting member 800 and the liquid cooling plate 100 can also be improved, thereby improving the safety of the liquid cooling plate 100.

[0149] Please continue to refer to Figures 10 to 15. In one possible implementation, the first liquid cooling channel 1011 and the second liquid cooling channel 1012 both include a plurality of sub-channels 10 arranged in a vertical direction. The number of sub-channels 10 in the first liquid cooling channel 1011 is greater than the number of sub-channels 10 in the second liquid cooling channel 1012.

[0150] In the above embodiments, on the one hand, it is easier to fill each sub-channel 10 with coolant, further increasing the contact area between coolant and liquid cooling plate 100, indirectly increasing the heat exchange rate between coolant and liquid cooling plate 100, and improving the cooling effect of liquid cooling plate 100 on battery cell module 20.

[0151] In one possible implementation, this application also provides a vehicle, including a vehicle body and the aforementioned battery pack, the battery pack being disposed on the vehicle body. The vehicle equipped with the aforementioned battery pack can improve the cooling effect on the cell module 20.

[0152] Referring to Figures 1 to 5, and in conjunction with Figures 16 and 17, this application embodiment provides a battery cell module 20, including: a liquid cooling plate 100 and two battery cell assemblies 200.

[0153] The cell assembly 200 includes at least two layers of cells stacked alternately on top of each other 210.

[0154] The accompanying drawings show a battery cell assembly 200 comprising two layers of cell arrays 210. Of course, the battery cell assembly 200 may also include more than two layers of cell arrays 210, such as three or four layers. The specific number of cell arrays 210 can be selected according to the actual application space. This application embodiment does not limit the number of cell arrays 210 in the battery cell assembly 200.

[0155] The cell array 210 includes multiple cylindrical cells 211 arranged horizontally in sequence. This horizontal arrangement of the cylindrical cells 211 improves space utilization and facilitates the installation of a pressure relief structure within the cell module 20. In one example, the cylindrical cells 211 are lithium iron phosphate cells. Lithium iron phosphate cells have high thermal stability, which improves the safety of the cell module 20, and they are also relatively environmentally friendly.

[0156] The horizontal arrangement of cylindrical cells 211 can make full use of space and facilitates the setting of the pressure relief structure of cell module 20. When cell module 20 is collided or subjected to impact force, the sidewalls of the horizontally arranged cylindrical cells 211 are not easily affected by the impact force, thus protecting the cylindrical cells 211.

[0157] A liquid cooling plate 100 is disposed between two cell assemblies 200 and abuts against a cylindrical cell 211. In one example, the liquid cooling plate 100 abuts against the ends of the left and right adjacent cylindrical cells 211.

[0158] The liquid cooling plate 100 is used to introduce refrigerant, and the liquid cooling plate 100 is configured to cool the cylindrical cell 211 by utilizing the phase change of the refrigerant.

[0159] It should be noted that the main function of the liquid cooling plate 100 is to absorb the heat generated on the cell array 210 through heat conduction, thereby dissipating heat from the cell array 210 and eliminating the negative impact of the large amount of heat generated by the cell array 210 on the cell array 210. Here, the phase change of the refrigerant is accompanied by heat absorption and heat release processes, which can absorb the heat of the cylindrical cell 211 and release the heat at other locations, thus achieving the effect of heat dissipation for the cylindrical cell 211.

[0160] In the above embodiment, by placing the liquid cooling plate 100 between two cell assemblies 200, and with the opposite sides of the liquid cooling plate 100 abutting against the sides of each cell array 210, which is equivalent to abutting against the end face of the cylindrical cell 211, the liquid cooling plate 100 is used to introduce refrigerant for heat dissipation of each cell array 210. Through this arrangement, the liquid cooling plate 100 adopts a direct cooling method, which can simultaneously dissipate heat from at least four layers of cell arrays 210 located on both sides of the liquid cooling plate 100. Compared to the traditional method of placing the liquid cooling plate 100 between two cell arrays 210, this improves the heat dissipation effect of the liquid cooling plate 100 on the cell arrays 210 and enhances the heat dissipation effect of the cylindrical cell 211.

[0161] Furthermore, the cell assembly 200 includes at least two layers of staggered cell arrays 210. It is understood that there is a gap between two adjacent cell arrays 210. By staggering the two cell arrays 210, the gap space between the two adjacent cell arrays 210 can be fully utilized. Under the premise that the battery pack space of the vehicle is fixed, the space inside the battery pack can be fully utilized, the energy density can be improved, the space utilization rate can be increased, and the battery pack capacity can be expanded.

[0162] Additionally, a liquid cooling plate 100 abuts against two battery cell assemblies 200 on opposite sides. Each battery cell assembly 200 includes at least two vertically arranged cell rows 210, which is equivalent to the cylindrical cells 211 being arranged horizontally, thus facilitating full utilization of the internal space of the battery pack. Furthermore, the number of battery cell modules 20 can be designed as needed along the length of the vehicle.

[0163] Cylindrical cell 211 has high energy density and stable structure. Furthermore, the cylindrical cell 211 is integrally molded on the side, which has good sealing performance and reduces potential safety hazards.

[0164] Multiple cylindrical battery cells 211 are arranged along the length of the liquid cooling plate 100.

[0165] The sides of two adjacent cylindrical cells 211 are in close contact. It should be noted that, referring to Figure 17, each cylindrical cell 211 has two circular end faces and cylindrical side faces. Multiple cylindrical cells 211 are arranged along the length of the liquid cooling plate 100, with the end faces of each cell abutting against the liquid cooling plate 100. The axis of the cylindrical battery is perpendicular to the plane of the liquid cooling plate 100, and the cylindrical side faces of adjacent cells 211 are in close contact.

[0166] By adopting the above configuration, on the one hand, the space inside the battery pack can be fully utilized to increase the energy density; on the other hand, more cylindrical cells 211 can be cooled through the liquid cooling plate 100, further improving the heat dissipation effect of the liquid cooling plate 100.

[0167] In one possible implementation, continuing to refer to Figures 4 and 5, the cell module 20 further includes a frame 300 having a mounting cavity in which the two cell assemblies 200 and the liquid cooling plate 100 are disposed.

[0168] The width of the mounting cavity is aligned with the length of each cylindrical cell 211.

[0169] The width of the mounting cavity is designed to be aligned with the length of the vehicle.

[0170] In the above embodiment, the frame 300 is disposed on the opposite sides of the two cell assemblies 200. The frame 300 provides an installation position for the cell assembly 200. At the same time, by setting the frame 300, the cell module 20 can be integrated, which facilitates the assembly of the cell module 20 and its overall installation into the battery pack. The width direction of the mounting cavity is consistent with the length direction of each cylindrical cell 211, which allows more cylindrical cells 211 to be installed in the mounting cavity and reduces the waste of space in the mounting cavity. At the same time, the width direction of the mounting cavity is set along the length direction of the vehicle. It can be understood that the length direction of the cylindrical cells 211 is set along the length direction of the vehicle. During the vehicle's operation, there are acceleration and deceleration processes. Under the influence of inertia, the cylindrical cells in the battery pack may shift. Setting the length direction of the cylindrical cells 211 along the length direction of the vehicle can alleviate the influence of inertia on the cylindrical cells 211 during vehicle operation, improve the stability of the cylindrical cells 211, and thus improve the overall stability of the battery pack.

[0171] In one possible implementation, referring to Figures 10 and 16, the liquid cooling plate 100 has a refrigerant channel 101 for introducing refrigerant.

[0172] The liquid cooling plate 100 has a refrigerant inlet 400 and a refrigerant outlet 900 at the same end.

[0173] The refrigerant inlet 400 and the refrigerant outlet 900 are connected to both ends of the refrigerant passage 101, respectively. The refrigerant inlet 400 and the refrigerant outlet 900 are connected to the vehicle's thermal management system.

[0174] In the above embodiment, by setting both the refrigerant inlet 400 and the refrigerant outlet 900 at the same end of the liquid cooling plate 100, the refrigerant inlet 400 and the refrigerant outlet 900 can be installed on the same side of the cell module 20, thereby reducing the space occupied by the refrigerant inlet 400, the refrigerant outlet 900 and the liquid cooling plate 100 in the horizontal direction, and further increasing the energy density of the battery pack.

[0175] In addition, the refrigerant channel 101 of the liquid cooling plate 100 contains refrigerant, which has good heat dissipation performance and high heat exchange efficiency, thus improving the heat dissipation effect. Furthermore, the refrigerant has good environmental performance, is easy to maintain, and is highly flexible. The refrigerant circulates between the vehicle's thermal management system, the refrigerant inlet 400, the refrigerant channel 101 of the liquid cooling plate 100, and the refrigerant outlet 900.

[0176] In one possible implementation, the refrigerant inlet 400 and the refrigerant outlet 900 are respectively disposed at the lower and upper parts of the end of the liquid cooling plate 100. It is understood that the liquid cooling plate 100 is vertically disposed between the two battery cell assemblies 200. When the refrigerant flows within the refrigerant channel 101 of the liquid cooling plate 100, it first enters the refrigerant channel 101 from the lower part of the liquid cooling plate 100. Due to gravity, the refrigerant fills the lower part of the refrigerant channel 101 and then flows out of the liquid cooling plate 100 from the upper part of the refrigerant channel 101. This arrangement ensures that the refrigerant filling within the liquid cooling plate 100 is complete, effectively carrying away the heat from the liquid cooling plate 100 and improving heat dissipation.

[0177] Furthermore, by setting the refrigerant inlet 400 and refrigerant outlet 900 at the lower and upper parts of the liquid cooling plate 100 respectively, the refrigerant inlet 400 and refrigerant outlet 900 utilize the space at the upper and lower parts of the liquid cooling plate 100, thereby further reducing the space occupied by the refrigerant inlet 400 and refrigerant outlet 900; and when the refrigerant flows in the refrigerant channel 101, it can enter from the lower part of the liquid cooling plate 100 and exit from the upper part, preventing mutual interference between the refrigerant channels 101 inside the liquid cooling plate 100, and indirectly improving the cooling effect on the battery cell array 210.

[0178] In one possible implementation, the refrigerant inlet 400 includes an inlet valve seat 410 and a refrigerant inlet pipe 420.

[0179] The liquid inlet valve seat 410 is connected to one end of the refrigerant passage 101. The liquid inlet valve seat 410 is located on one side of the liquid cooling plate 100. One end of the refrigerant inlet pipe 420 is connected to the liquid inlet valve seat 410.

[0180] The refrigerant outlet component 900 includes an outlet valve seat 910 and a refrigerant outlet pipe 920.

[0181] The liquid outlet valve seat 910 is connected to the other end of the refrigerant passage 101. The liquid outlet valve seat 910 is located on the other side of the liquid cooling plate 100. One end of the refrigerant outlet pipe 920 is connected to the liquid outlet valve seat 910.

[0182] In a specific implementation, a connecting seat 600 is welded to one side of the liquid cooling plate 100 at the location of the liquid inlet valve seat 410. The liquid inlet valve seat 410 is detachably connected to the connecting seat 600 by bolts. The liquid inlet valve seat 410 has a liquid inlet channel. One end of the liquid inlet channel is connected to the liquid inlet end of the refrigerant channel 101, and the other end of the liquid inlet channel is connected to one end of the refrigerant inlet pipe 420.

[0183] In the above embodiment, by adopting the configuration of the liquid inlet valve seat 410 and the refrigerant inlet pipe 420, it is convenient for the refrigerant inlet pipe 420 to communicate with the refrigerant channel 101 in the liquid cooling plate 100 through the liquid inlet valve seat 410. Furthermore, the configuration of the liquid inlet valve seat 410 improves the fixing strength of the refrigerant inlet pipe 420, preventing the refrigerant inlet pipe 420 from becoming detached from the liquid cooling plate 100 when the vehicle vibrates.

[0184] A connecting seat 600 is welded to the other side of the liquid cooling plate 100 and at the location of the liquid outlet valve seat 910. The liquid outlet valve seat 910 is detachably connected to the connecting seat 600 by bolts. The liquid outlet valve seat 910 has a liquid outlet channel. One end of the liquid outlet channel is connected to the liquid outlet end of the refrigerant channel 101, and the other end of the liquid outlet channel is connected to one end of the refrigerant liquid outlet pipe 920.

[0185] By adopting the configuration of the liquid outlet valve seat 910 and the refrigerant liquid outlet pipe 920, it is convenient for the refrigerant liquid outlet pipe 920 to connect with the refrigerant channel 101 in the liquid cooling plate 100 through the liquid outlet valve seat 910. Furthermore, the configuration of the liquid outlet valve seat 910 improves the fixing strength of the refrigerant liquid outlet pipe 920, preventing the refrigerant liquid outlet pipe 920 from becoming detached from the liquid cooling plate 100 when the vehicle vibrates.

[0186] In a specific implementation, the liquid cooling plate 100 also has a sensor (not shown in the figure). The sensor is set on at least one of the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920. In this embodiment, the sensor is set as a sensor for detecting temperature. In other embodiments, the sensor can also be set as a sensor for detecting refrigerant flow rate, or a sensor for leak detection, etc. The number of sensors can be adjusted adaptively as needed. For example, sensors can be set at different positions on the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920.

[0187] By adopting the above technical solution and by setting up sensors, it is convenient to detect the temperature or other characteristic factors in the refrigerant inlet pipe 420 and the refrigerant outlet pipe 920, thereby facilitating timely adjustment of the refrigerant flow rate and indirectly improving the heat dissipation effect of the liquid cooling plate 100 on the cell array 210.

[0188] In one possible implementation, as shown in FIG16, the cell assembly 200 further includes a support plate 220.

[0189] The support plate 220 is positioned between two battery cell rows 210 that are stacked vertically in an alternating manner.

[0190] The support plate 220 has limiting grooves 221 on its opposite sides that match the sides of the battery cell array 210.

[0191] The cell array 210 is correspondingly locked in the limiting groove 221.

[0192] Specifically, the support plate 220 has limiting grooves 221 on its opposite sides that match the side of the cell array 210. The limiting grooves 221 are arc-shaped grooves that match the side of the cylindrical cell 211.

[0193] By setting up a support plate 220 and detachably connecting the support plate 220 to the battery pack, the fixing strength of the cell assembly 200 can be improved, the stability of the cell assembly 200 can be improved, and the support plate 220 can separate the upper and lower battery packs, eliminating the negative impact of electrical gaps between adjacent battery packs on the battery packs.

[0194] Of course, the support plate 220 also has a certain insulation effect, which prevents short circuits between adjacent layers of cell array 210 and improves the safety of cell array 210.

[0195] In another possible implementation, the support plate 220 is a cold plate to cool the cylindrical cell 211 that abuts against the support plate 220.

[0196] The cell assembly 200 also includes at least two insulating strips 230.

[0197] The insulating strip 230 is attached to the cell array 210 located on the lower side.

[0198] The projection of the end face of the cell array 210 toward the insulating strip 230 is located inside the insulating strip 230.

[0199] In the above embodiment, the insulating strip 230 is bonded to the lower cell array 210, which is equivalent to insulating the cell assembly 200 and preventing short circuit between the cell assembly 200 and the battery pack. In addition, the insulating strip 230 is placed between the battery pack and the cell array, which widens the gap between the cell array and the battery pack, making it easier to fill the gap with adhesive and further improving the stability of the cell assembly 200.

[0200] The projection of the end face of the cell array 210 toward the insulating strip 230 is located inside the insulating strip 230. It is understood that the end face of the cylindrical cell 211 has a positive and a negative terminal for conducting electricity. The fact that the projection of the end face of the cell array 210 toward the insulating strip 230 is located inside the insulating strip 230 can prevent the end face of the cylindrical cell 211 from contacting the battery pack, thereby improving safety.

[0201] This application embodiment also provides a battery pack. Referring to Figures 1 and 2, the battery pack includes a frame 700 and at least two of the above-described cell modules 20 disposed within the frame 700.

[0202] The specific structure of the cell module 20 has been described in detail above. By setting the battery pack with the cell module 20, the heat dissipation effect of the battery pack can be improved. At the same time, the installation space inside the battery pack can be fully utilized to expand the battery pack's capacity.

[0203] In one possible implementation, this application also provides a vehicle, including a vehicle body and at least one of the aforementioned battery cell modules 20 disposed on the vehicle body.

[0204] It should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A liquid-cooled assembly, wherein, The liquid cooling assembly includes: at least one liquid cooling plate (100); The liquid cooling plate (100) is configured to abut against the battery cell array (210) on both opposite sides. A refrigerant channel (101) is provided inside the liquid cooling plate (100); The refrigerant channel (101) includes a first liquid cooling channel (1011) and a second liquid cooling channel (1012) connected to the liquid outlet end of the first liquid cooling channel (1011); the first liquid cooling channel (1011) and the second liquid cooling channel (1012) are arranged parallel to each other; The refrigerant channel (101) is configured to allow coolant to pass through, and the coolant flows out of the liquid cooling plate (100) sequentially through the first liquid cooling channel (1011) and the second liquid cooling channel (1012).

2. The liquid cooling assembly of claim 1, wherein, The cross-sectional area of ​​the first liquid cooling channel (1011) is larger than the cross-sectional area of ​​the second liquid cooling channel (1012).

3. The liquid cooling assembly of claim 1, wherein, Both the first liquid cooling channel (1011) and the second liquid cooling channel (1012) extend along the length direction of the liquid cooling plate (100); The first liquid cooling channel (1011) is located above the second liquid cooling channel (1012).

4. The liquid cooling assembly of claim 1, wherein, The liquid cooling assembly further includes a connecting member (800), which is disposed at one end of the liquid cooling plate (100) and has a connecting cavity (500) inside the connecting member (800); The liquid outlet of the first liquid cooling channel (1011) is connected to the liquid inlet of the second liquid cooling channel (1012) through the connecting cavity (500), and / or, the connecting cavity (500) is located at the end of the liquid cooling plate (100) in the length direction, and the projection of the connecting cavity (500) in the thickness direction of the liquid cooling plate (100) is set to be located outside the side coverage area of ​​the cell module (20).

5. The liquid cooling assembly according to claim 4, wherein, The communicating cavity (500) has a liquid inlet (510) and a liquid outlet (520), the first liquid cooling channel (1011) is connected to the liquid inlet (510), and the second liquid cooling channel (1012) is connected to the liquid outlet (520); 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 (100) is greater than the dimension of the liquid outlet area (540) along the length of the liquid cooling plate (100), and / or, in the communicating cavity (500), the width of at least a portion of the area gradually decreases from the liquid inlet area (530) to the liquid outlet area (540).

6. The liquid cooling assembly according to claim 5, wherein, 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 liquid cooling plate (100); the width of the flow guiding area gradually decreases from the liquid inlet (510) toward the liquid outlet (520).

7. The liquid cooling assembly according to any one of claims 4 to 6, wherein, The connecting piece (800) covers the outer side of the end of the liquid cooling plate (100) with one edge facing the liquid cooling plate (100) and is welded to the liquid cooling plate (100).

8. The liquid cooling assembly according to any one of claims 4 to 6, wherein, The connecting member (800) has a clearance notch (810) on its side wall. The clearance notch (810) is configured to avoid the battery cell array (210) so that the battery cell array (210) at the clearance notch (810) abuts against the side wall of the liquid cooling plate (100). And / or, the profile shape of the connecting member (800) on the side connected to the liquid cooling plate (100) is set to match the edge profile shape of the cell array (210).

9. The liquid cooling assembly according to any one of claims 4 to 6, wherein, Both the first liquid cooling channel (1011) and the second liquid cooling channel (1012) include multiple sub-channels (10) arranged vertically and parallel to each other; The sub-channels (10) of the first liquid cooling channel (1011) and the sub-channels (10) of the second liquid cooling channel (1012) are both connected to the communicating cavity, and / or, the number of sub-channels (10) of the first liquid cooling channel (1011) is greater than the number of sub-channels (10) of the second liquid cooling channel (1012).

10. The liquid cooling assembly according to any one of claims 4 to 6, wherein, The liquid cooling assembly also includes a refrigerant inlet (400) and a refrigerant outlet (900); The refrigerant inlet (400) is connected to the inlet end of the first liquid cooling channel (1011), and the refrigerant outlet (900) is connected to the outlet end of the second liquid cooling channel (1012). The liquid inlet end of the first liquid cooling channel (1011) and the liquid outlet end of the second liquid cooling channel (1012) are located at the same end of the liquid cooling plate (100); The refrigerant inlet (400) and the refrigerant outlet (900) are configured to be connected to the thermal management system so that the coolant enters the first liquid cooling channel (1011) through the refrigerant inlet (400) and flows out of the second liquid cooling channel (1012) from the refrigerant outlet (900).

11. The liquid cooling assembly according to claim 10, wherein, The refrigerant inlet (400) and the refrigerant outlet (900) are respectively disposed at the lower and upper parts of the end of the liquid cooling plate (100), or the first liquid cooling channel (1011) is located below the second liquid cooling channel (1012).

12. The liquid cooling assembly according to claim 10, wherein, The refrigerant inlet component (400) includes an inlet valve seat (410) and a refrigerant inlet pipe (420); The liquid inlet valve seat (410) is connected to one end of the refrigerant channel (101), the liquid inlet valve seat (410) is disposed on one side of the cold plate, and one end of the refrigerant inlet pipe (420) is connected to the liquid inlet valve seat (410); The refrigerant outlet component (900) includes an outlet valve seat (910) and a refrigerant outlet pipe (920). The outlet valve seat (910) is connected to the other end of the refrigerant channel (101). The outlet valve seat (910) is located on the other side of the cold plate. One end of the refrigerant outlet pipe (920) is connected to the outlet valve seat (910).

13. The liquid cooling assembly according to claim 12, wherein, The liquid cooling assembly also includes at least two connectors (600); The connecting seat (600) is connected to the side wall of the liquid cooling plate (100); The refrigerant inlet (400) and the refrigerant outlet (900) are respectively connected to the two connecting seats (600) one by one; The refrigerant inlet (400) is connected to the first liquid cooling channel (1011) through one of the connectors (600), and the refrigerant outlet (900) is connected to the second liquid cooling channel (1012) through the other connector (600).

14. A battery cell module, wherein, include: Two battery cell assemblies (200), each comprising at least two layers of staggered battery cell rows (210), each battery cell row (210) comprising a plurality of cylindrical battery cells (211) arranged horizontally in sequence; The liquid cooling assembly as claimed in any one of claims 1 to 13; the liquid cooling assembly is disposed between the two cell assemblies (200) and abuts against the cylindrical cell (211).

15. The cell module according to claim 14, wherein, Multiple cylindrical cells (211) are arranged along the length of the liquid cooling assembly.

16. The cell module according to claim 14, wherein, The battery cell module (20) also includes a frame (300), the frame (300) having a mounting cavity, and both battery cell assemblies (200) are disposed in the mounting cavity; The width direction of the mounting cavity is consistent with the length direction of each cylindrical battery cell (211); The width of the mounting cavity is set to be along the length of the vehicle.

17. The cell module according to claim 14, wherein, The battery cell assembly (200) also includes a support plate (220); The support plate (220) is disposed between two battery cell rows (210) that are stacked in an alternating manner. The support plate (220) has limiting grooves (221) on its opposite sides that match the side of the battery cell array (210); The battery cell array (210) is correspondingly engaged in the limiting groove (221).

18. The cell module according to claim 17, wherein, The support plate (220) is a cold plate.

19. A battery pack, wherein, It includes a frame (700) and at least two cell modules (20) as described in any one of claims 14 to 18 disposed within the frame (700).

20. A vehicle, wherein, Includes a vehicle body and a cell module (20) as described in any one of claims 14 to 18 disposed on the vehicle body, and / or includes a battery pack as described in claim 19; the vehicle body is connected to the battery pack.

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