Liquid cooling assembly, battery cell module and battery pack

Abstract

The utility model provides a liquid cooling assembly, a battery cell module and a battery pack, and relates to the field of a cylindrical battery cell cooling technology. The liquid cooling assembly comprises at least one liquid cooling plate, the two opposite sides of the liquid cooling plate are used for abutting against a battery cell row, a cooling channel is formed in the liquid cooling plate, the cooling channel comprises an upper layer channel and a lower layer channel communicated with the liquid outlet end of the upper layer channel, and the cooling channel is used for introducing cooling liquid. The cooling liquid flows out of the liquid cooling plate through the upper-layer channel and the lower-layer channel in sequence. After the cooling liquid is introduced into the cooling channel of the liquid cooling plate, the cooling liquid sequentially passes through the upper-layer channel and the lower-layer channel to cool the battery cell row, and compared with the traditional mode that the cooling liquid only circulates in the cooling channel once and cools the battery cell row once, the cooling effect is better. It can be understood that the contact duration between the cooling liquid and the liquid cooling plate can be prolonged, heat conduction between the liquid cooling plate and the cooling water is better achieved, and then the cooling effect is improved.

Description

TECHNICAL FIELD

[0001] The application relates to a cylindrical battery cell cooling technology, in particular to a liquid cooling assembly, a battery cell module and a battery pack. BACKGROUND

[0002] The battery cell in the new energy automobile battery pack can adopt a cylindrical battery cell, and the cylindrical battery cell is widely applied due to the advantages of small volume and better absorption of expansion force.

[0003] At present, during the assembly of the cylindrical battery cell into the battery pack, a plurality of cylindrical battery cells are first assembled into a battery cell row state, then a plurality of battery cell rows are assembled into a battery cell module together with a liquid cooling plate, and then a plurality of battery cell modules are assembled on a frame to form the battery pack. The liquid cooling plate is provided with a cooling channel, and the battery cell row is cooled by circulating and injecting cooling liquid into the cooling channel.

[0004] However, the setting direction of the cooling channel in the conventional liquid cooling plate is single, and the cooling liquid can only be cooled once when flowing in the cooling channel. The cooling liquid flow direction is limited by the cooling channel, and the cooling effect is not good. INVENTION CONTENTS

[0005] Therefore, the application provides a liquid cooling assembly, a battery cell module and a battery pack, which can enable the liquid cooling plate to cool the battery cell row multiple times and improve the cooling effect.

[0006] To achieve the above-mentioned purpose, the application provides a liquid cooling assembly, a battery cell module and a battery pack, which adopt the following technical solutions:

[0007] In a first aspect, the application provides a liquid cooling assembly for cooling a battery cell row, comprising: at least one liquid cooling plate;

[0008] The opposite sides of the liquid cooling plate are used for abutting against the battery cell row;

[0009] The liquid cooling plate is provided with a cooling channel;

[0010] The cooling channel comprises an upper channel and a lower channel in communication with the liquid outlet end of the upper channel, and the upper channel is located above the lower channel;

[0011] The cooling channel is used for introducing cooling liquid, and the cooling liquid flows out of the liquid cooling plate in sequence through the upper channel and the lower channel.

[0012] In a possible implementation manner, the liquid cooling assembly provided by the application, the cross-sectional area of the upper channel is greater than the cross-sectional area of the lower channel.

[0013] In a possible implementation, the liquid cooling assembly provided in the present application, the upper channel and the lower channel are arranged in parallel to each other, and the upper channel and the lower channel both extend along the length direction of the liquid cooling plate.

[0014] In a possible implementation, the liquid cooling assembly provided in the present application further comprises a communication member, the communication member is arranged at one end of the liquid cooling plate, the communication member has a communication cavity therein, and the liquid outlet end of the upper channel is in communication with the liquid inlet end of the lower channel through the communication cavity.

[0015] In a possible implementation, the liquid cooling assembly provided in the present application, the upper channel and the lower channel both comprise a plurality of sub-channels arranged in parallel to each other; and the sub-channels of the upper channel and the sub-channels of the lower channel are both in communication with the communication cavity.

[0016] In a possible implementation, the liquid cooling assembly provided in the present application, a relief gap is arranged on the side wall of the communication member, the relief gap is used for avoiding the battery cell row, so that the battery cell row at the relief gap is in abutment with the side wall of the liquid cooling plate.

[0017] In a possible implementation, the liquid cooling assembly provided in the present application further comprises a coolant liquid inlet member and a coolant liquid outlet member.

[0018] The coolant liquid inlet member is in communication with the liquid inlet end of the upper channel, and the coolant liquid outlet member is in communication with the liquid outlet end of the lower channel.

[0019] The liquid inlet end of the upper channel and the liquid outlet end of the lower channel are located at the same end of the liquid cooling plate.

[0020] The coolant liquid inlet member and the coolant liquid outlet member are used for being connected with a thermal management system, so that the coolant liquid enters the upper channel through the coolant liquid inlet member and flows out of the lower channel from the coolant liquid outlet member.

[0021] In a possible implementation, the liquid cooling assembly provided in the present application further comprises at least two connecting seats.

[0022] The connecting seats are connected with the side wall of the liquid cooling plate.

[0023] The coolant liquid inlet member and the coolant liquid outlet member are respectively connected with the two connecting seats one by one.

[0024] The coolant liquid inlet member is in communication with the upper channel through one of the connecting seats, and the coolant liquid outlet member is in communication with the lower channel through the other connecting seat.

[0025] In a second aspect, the application provides an electric cell module, comprising at least one electric cell row and the above-mentioned liquid cooling assembly abutting against the end of the electric cell row.

[0026] In a third aspect, the application provides a battery pack, comprising a frame body and at least one above-mentioned electric cell module arranged in the frame body.

[0027] The application provides a liquid cooling assembly, an electric cell module and a battery pack, wherein the liquid cooling assembly comprises at least one liquid cooling plate, the opposite sides of the liquid cooling plate are used for abutting against the electric cell row, the liquid cooling plate is provided with a cooling channel, the cooling channel comprises an upper layer channel and a lower layer channel in communication with the liquid outlet end of the upper layer channel, the cooling channel is used for passing in cooling liquid, and the cooling liquid flows out of the liquid cooling plate in sequence through the upper layer channel and the lower layer channel. After the cooling liquid is passed in the cooling channel of the liquid cooling plate, the cooling liquid cools the electric cell row in sequence through the upper layer channel and the lower layer channel, compared with the traditional cooling liquid which only flows through the cooling channel once and cools the electric cell row once, the cooling effect is better. It can be understood that the contact time between the cooling liquid and the liquid cooling plate can be increased, the heat conduction between the liquid cooling plate and the cooling water is better, and the cooling effect is improved.

[0028] In addition to the technical problems solved by the embodiments of the application described above, the technical features constituting the technical solutions and the beneficial effects brought by these technical features, other technical problems solved by the technical solutions of the application, other technical features contained in the technical solutions and the beneficial effects brought by these technical features will be further described in detail in the specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0029] The specific embodiments of the application will be described in detail below with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only used to illustrate and explain the application, and the application is not limited to the following specific embodiments.

[0030] Figure 1 Part structure schematic diagram of a liquid cooling assembly and an electric cell module provided by the embodiments of the application;

[0031] Figure 2 For Figure 1 Structure schematic diagram of a liquid cooling assembly in the embodiments of the application;

[0032] Figure 3 For Figure 2 Structure schematic diagram of a liquid cooling plate in the embodiments of the application;

[0033] Figure 4 For Figure 3 Part internal structure schematic diagram of the liquid cooling plate;

[0034] Figure 5 Part internal structure schematic diagram of the liquid cooling plate provided by the embodiments of the application;

[0035] Figure 6 Part structure schematic diagram of refrigerant inlet member and refrigerant outlet member provided by the embodiment of the present application.

[0036] Explanation of reference signs:

[0037] 10, sub-channel;

[0038] 100, liquid cooling plate; 101, cooling channel; 1011, upper layer channel; 1012, lower layer channel;

[0039] 210, battery cell row; 211, cylindrical battery cell;

[0040] 400, refrigerant inlet member; 410, inlet valve seat; 420, refrigerant inlet pipe;

[0041] 500, refrigerant outlet member; 510, outlet valve seat; 520, refrigerant outlet pipe;

[0042] 600, connecting seat;

[0043] 800, communication member; 810, avoiding gap.

[0044] The specific embodiments of the present application have been shown by the above-mentioned drawings, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solutions and advantages of the present application more clear, the technical solutions in the embodiments of the present application will be described in more detail below by combining the drawings in the preferred embodiments of the present application. In the drawings, the same or similar reference signs represent the same or similar components or components with the same or similar functions throughout. The described embodiments are part of the embodiments of the present application, not all the embodiments. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as limiting the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative efforts, fall within the scope of protection of the present application. The embodiments of the present application will be described in detail below by combining the drawings.

[0046] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited, the terms "mount", "connect", "connect" should be understood in a broad sense, for example, it can be fixedly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0047] In the description of the embodiments of the present application, it should be understood that the terms "upper", "lower", "front", "back", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation to the present application.

[0048] In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0049] The terms "first", "second", "third", "fourth" and the like in the specification and claims of the present application and the above drawings are used to distinguish similar objects, and do not necessarily describe a particular order or sequence.

[0050] In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0051] New energy vehicles aim to provide more environmentally friendly and energy-saving transportation through advanced vehicle power control and driving technology. These vehicles no longer rely on traditional gasoline or diesel fuel, but use electricity, hydrogen or other unconventional energy as the main power source. In a broad sense, new energy vehicles include all vehicles that use non-petroleum fuels, while in a narrow sense, they usually refer to vehicles that use unconventional fuels, among which electric new energy vehicles are particularly widely used, and the power source of electric new energy vehicles is usually cylindrical batteries, which are widely used because of their small size, stable structure, better absorption of expansion force and other advantages.

[0052] In the related art, during assembly of a cylindrical battery cell into a battery pack, a plurality of cylindrical battery cells are first assembled into a battery cell row state, then a plurality of battery cell rows are assembled into a battery cell module state together with a liquid cooling plate, and then a plurality of battery cell modules are assembled into the battery pack. The liquid cooling plate is provided with a cooling channel, and the battery cell row is cooled by circulating and injecting cooling liquid into the cooling channel.

[0053] The direction of the cooling channel in the conventional liquid cooling plate is single, and the cooling liquid can only cool the battery cell row once when flowing in the conventional cooling channel. The flow path is limited by the cooling channel, and the effect is not good.

[0054] Based on the above technical problems, the embodiments of the present application provide a liquid cooling assembly, a battery cell module and a battery pack. In the technical solution, the liquid cooling assembly includes at least one liquid cooling plate, the opposite sides of the liquid cooling plate are used to abut against the battery cell row, the liquid cooling plate is provided with a cooling channel, the cooling channel includes an upper channel and a lower channel communicated with the liquid outlet end of the upper channel, the cooling channel is used to pass in cooling liquid, and the cooling liquid flows out of the liquid cooling plate through the upper channel and the lower channel in sequence. After the cooling liquid is passed into the cooling channel of the liquid cooling plate, the cooling liquid cools the battery cell row through the upper channel and the lower channel in sequence. Compared with the conventional cooling liquid which only flows through the cooling channel once and cools the battery cell row once, the cooling effect is better. It can be understood that the contact time between the cooling liquid and the liquid cooling plate can be increased, the heat conduction between the liquid cooling plate and the cooling water can be better realized, and the cooling effect can be improved.

[0055] It should be noted that, Figures 1 to 6 The schematic diagram of the liquid cooling assembly, the battery cell module and the battery pack is shown, and the specific structure of the remaining parts of the liquid cooling assembly, the battery cell module and the battery pack is not limited to Figures 1 to 6 The example.

[0056] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail in the following specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described in detail in some embodiments. The embodiments of the present application will be described with reference to the accompanying drawings:

[0057] Referring to Figures 1 to 5 The embodiments of the present application provide a liquid cooling assembly for cooling a battery cell row 210. It should be noted that the battery cell row 210 includes a plurality of cylindrical battery cells 211, the cylindrical battery cells 211 have high energy density, stable structure, and the side surface of the cylindrical battery cells 211 is integrally formed, which has good sealing performance and reduces potential safety hazards.

[0058] The liquid cooling assembly includes at least one liquid cooling plate 100.

[0059] The opposite sides of the liquid cooling plate 100 are used to abut against the end portions of the battery cell row 210.

[0060] The cooling channel 101 is formed in the liquid cooling plate 100.

[0061] The cooling channel 101 includes an upper layer channel 1011 and a lower layer channel 1012 in communication with the liquid outlet end of the upper layer channel 1011, and the upper layer channel 1011 is located above the lower layer channel 1012.

[0062] The cross-sectional area of the upper layer channel 1011 is greater than that of the lower layer channel 1012.

[0063] The cooling channel 101 is used to pass cooling liquid, and the cooling liquid flows out of the liquid cooling plate 100 through the upper layer channel 1011 and the lower layer channel 1012 in sequence.

[0064] It should be noted that the main function of the liquid cooling plate 100 is to transfer the heat generated on the battery cell row 210 to the thermal management system by heat conduction, so as to dissipate the heat generated by the battery cell row 210 and eliminate the negative effects of the heat generated by the battery cell row 210 on the battery cell row 210. The thermal management system can be the thermal management system of the vehicle itself, and the thermal management system is the prior art in the related field, and the thermal management system of the vehicle of the present application is not limited.

[0065] In the above embodiment, by setting the cross-sectional area of the upper layer channel 1011 to be greater than that of the lower layer channel 1012, after the cooling liquid is introduced into the cooling channel 101 of the liquid cooling plate 100, the cooling liquid in the upper layer channel 1011 has a larger contact area with the liquid cooling plate 100. It can be understood that, compared with the cooling liquid in the lower layer channel 1012, the cooling liquid in the upper layer channel 1011 has a lower temperature when it initially enters the upper layer channel 1011. Of course, the cooling effect of the cooling liquid on the battery cell row 210 is good at a lower temperature. The above setting mode is equivalent to making the cooling liquid at a lower temperature have a larger contact area with the liquid cooling plate 100. Through heat exchange between the liquid cooling plate 100 and the cooling liquid, the cooling of the liquid cooling plate 100 on the battery cell row 210 is realized, thereby improving the cooling effect of the cooling liquid on the battery cell row 210.

[0066] In a specific implementation, the side surfaces of the two adjacent cylindrical battery cells 211 abut closely. It should be noted that the cylindrical battery cell 211 has two circular end surfaces and a cylindrical side surface, and a plurality of cylindrical battery cells 211 are arranged along the length direction of the liquid cooling plate 100, and the end surfaces of the cylindrical battery cells 211 abut against the liquid cooling plate 100, so that the end surfaces of the cylindrical battery cells 211 abut against the liquid cooling plate 100, and the axis of the cylindrical battery cell is perpendicular to the plane in which the liquid cooling plate 100 is located, and the side surfaces of the two adjacent cylindrical battery cells 211 abut closely.

[0067] Through the above setting mode, on the one hand, the space in the battery pack can be fully utilized to expand the energy density, and on the other hand, more cylindrical battery cells 211 can be cooled through the liquid cooling plate 100 to further improve the heat dissipation efficiency of the liquid cooling plate 100.

[0068] Of course, both sides of the liquid cooling plate 100 are used to abut against the battery cell row 210, which means that the liquid cooling plate 100 is provided with the battery cell row 210 on the opposite sides, and the number of battery cell rows 210 on each side can be one or more than one, which can be selected according to the design needs. When a plurality of battery cell rows 210 are arranged on one side of the liquid cooling plate 100, one liquid cooling plate 100 can simultaneously cool a plurality of battery cell rows 210 on both sides of the liquid cooling plate 100, further improving the cooling efficiency of the liquid cooling plate 100 on the battery cell row 210.

[0069] In the embodiment of the present application, the upper layer channel 1011 and the lower layer channel 1012 are arranged in parallel with each other, and both the upper layer channel 1011 and the lower layer channel 1012 extend along the length direction of the liquid cooling plate 100. The upper layer channel 1011 and the lower layer channel 1012 extend along the length direction of the liquid cooling plate 100 and are arranged in parallel, which can make the upper layer channel 1011 and the lower layer channel 1012 fully utilize the internal space of the liquid cooling plate 100, maximize the utilization of the internal space of the liquid cooling plate 100, and further enable more liquid cooling plates 100 to contact the cooling liquid, thereby improving the contact area between the cooling liquid and the liquid cooling plate 100, which is beneficial to improve the heat exchange rate between the liquid cooling plate 100 and the cooling liquid.

[0070] In a possible implementation, a communication member 800 is further included, which is arranged at one end of the liquid cooling plate 100, and the communication member 800 has a communication cavity therein, and the liquid outlet end of the upper layer channel 1011 communicates with the liquid inlet end of the lower layer channel 1012 through the communication cavity.

[0071] It should be noted that the liquid outlet end of the upper layer channel 1011 needs to communicate with the liquid inlet end of the lower layer channel 1012, and when the liquid outlet end of the upper layer channel 1011 and the liquid inlet end of the lower layer channel 1012 are realized on the same liquid cooling plate 100, part of the internal space of the liquid cooling plate 100 needs to be occupied to set a channel for communicating the upper layer channel 1011 and the lower layer channel 1012, and the processing is difficult. After setting the above channel, the effective cooling area of the liquid cooling plate 100 on the battery cell row 210 is reduced.

[0072] By setting the communication piece 800, the communication cavity in the communication piece 800 can be used to communicate the upper layer channel 1011 and the lower layer channel 1012, and the communication piece 800 is arranged at one end of the liquid cooling plate 100. Here, the communication piece 800 can be welded with the liquid cooling plate 100, or can be detachable connection meeting the sealing requirements. In summary, by setting the communication piece 800, on the one hand, the processing difficulty inside the liquid cooling plate 100 can be reduced, which helps to reduce the manufacturing cost, and on the other hand, part of the internal space of the liquid cooling plate 100 is not occupied, so that more liquid cooling plate 100 is used for cooling the battery cell row 210, and the cooling efficiency of the liquid cooling plate 100 on the battery cell row 210 is improved.

[0073] Further, the upper layer channel 1011 and the lower layer channel 1012 each include a plurality of sub-channels 10 arranged in parallel with each other. The sub-channels 10 of the upper layer channel 1011 and the sub-channels 10 of the lower layer channel 1012 are each in communication with the communication cavity.

[0074] Further, the number of the sub-channels 10 of the upper layer channel 1011 is greater than the number of the sub-channels 10 of the lower layer channel 1012, and the sum of the cross-sectional areas of the sub-channels 10 of the upper layer channel 1011 is the cross-sectional area of the upper layer channel 1011, and the sum of the cross-sectional areas of the sub-channels 10 of the lower layer channel 1012 is the cross-sectional area of the lower layer channel 1012.

[0075] By setting the sub-channels 10, on the one hand, the cooling liquid can be filled in each sub-channel 10 more conveniently, and the contact area between the cooling liquid and the liquid cooling plate 100 is further improved, and the heat exchange rate between the cooling liquid and the liquid cooling plate 100 is indirectly improved, and the cooling effect of the liquid cooling plate 100 on the battery cell row 210 is improved.

[0076] Compared with the conventional setting mode, the cooling liquid needs to fill the upper layer channel 1011, but due to the existence of gravity or pressure factors, the upper space of the upper layer channel 1011 is difficult to fill completely. By setting the sub-channels 10, the cooling liquid can be respectively introduced into each sub-channel 10, and each sub-channel 10 does not affect each other.

[0077] In other possible implementations, the side wall of the communication piece 800 is provided with an avoiding gap 810, and the avoiding gap 810 is used to avoid the battery cell row 210, so that the battery cell row 210 at the avoiding gap 810 abuts against the side wall of the liquid cooling plate 100.

[0078] The communication piece 800 is arranged at one end of the liquid cooling plate 100, and by setting the avoiding gap 810 on the communication piece 800, the cylindrical battery cell 211 near the avoiding gap 810 of the communication piece 800 can abut against the side wall of the liquid cooling plate 100, the design number threshold of the cylindrical battery cell 211 can be increased, the capacity of the battery cell row 210 can be expanded, and the capacity of the battery pack can be further expanded.

[0079] In addition, in the above embodiment, the cooling channel 101 is filled with cooling liquid, of course, the cooling liquid only represents a coolant liquid having a heat exchange effect, and a coolant oil or other forms of coolant liquid can be provided as needed, and the present application does not limit this. When the cooling liquid is used, the cooling liquid has good heat dissipation performance, high heat exchange efficiency, and can improve the heat dissipation efficiency. In addition, the cooling liquid has good environmental protection performance, is easy to maintain, and has high flexibility.

[0080] Referring to Figure 1 , Figure 2 , Figure 4 and Figure 6 In one possible implementation, the liquid cooling assembly further includes a coolant inlet member 400 and a coolant outlet member 500.

[0081] The coolant inlet member 400 is in communication with the inlet end of the upper channel 1011, and the coolant outlet member 500 is in communication with the outlet end of the lower channel 1012.

[0082] The inlet end of the upper channel 1011 and the outlet end of the lower channel 1012 are located at the same end of the liquid cooling plate 100.

[0083] The coolant inlet member 400 and the coolant outlet member 500 are used to connect with the thermal management system, so that the cooling liquid enters the upper channel 1011 through the coolant inlet member 400, and flows out of the lower channel 1012 from the coolant outlet member 500.

[0084] By setting the inlet end of the upper channel 1011 and the outlet end of the lower channel 1012 at the same end of the liquid cooling plate 100, the coolant inlet member 400 and the coolant outlet member 500 are both arranged at the same end of the liquid cooling plate 100, so that the coolant inlet member 400 and the coolant outlet member 500 can be installed on the same side of the battery cell module, thereby reducing the space occupation of the coolant inlet member 400, the coolant outlet member 500 and the liquid cooling plate 100 in the horizontal direction, and further expanding the energy density of the battery pack.

[0085] In specific implementation, the coolant inlet member 400 and the coolant outlet member 500 are arranged at the upper part and the lower part of the end of the liquid cooling plate 100, so that the coolant inlet member 400 and the coolant outlet member 500 utilize the space of the upper part and the lower part of the liquid cooling plate 100, thereby further reducing the space occupation of the coolant inlet member 400 and the coolant outlet member 500.

[0086] The coolant inlet member 400 and the coolant outlet member 500 are arranged on opposite sides of the liquid cooling plate 100, and it can be understood that by arranging the coolant inlet member 400 and the coolant outlet member 500 on opposite sides of the liquid cooling plate 100, the space on both sides of the liquid cooling plate 100 can be fully utilized, thereby improving the space utilization rate.

[0087] In a possible implementation, the liquid cooling assembly further comprises at least two connecting seats 600.

[0088] The connecting seat 600 is connected with the side wall of the liquid cooling plate 100.

[0089] The refrigerant inlet 400 and the refrigerant outlet 500 are connected with the two connecting seats 600 one by one.

[0090] The refrigerant inlet 400 is communicated with the upper channel 1011 through one of the connecting seats 600, and the refrigerant outlet 500 is communicated with the lower channel 1012 through the other connecting seat 600.

[0091] The refrigerant inlet 400 comprises an inlet valve seat 410 and a refrigerant inlet pipe 420.

[0092] The inlet valve seat 410 is communicated with the inlet end of the upper channel 1011, and the inlet valve seat 410 is arranged on one side of the liquid cooling plate 100, and one end of the refrigerant inlet pipe 420 is communicated with the inlet valve seat 410.

[0093] The refrigerant outlet 500 comprises an outlet valve seat 510 and a refrigerant outlet pipe 520.

[0094] The outlet valve seat 510 is communicated with the outlet end of the lower channel 1012, and the outlet valve seat 510 is arranged on the other side of the liquid cooling plate 100, and one end of the refrigerant outlet pipe 520 is communicated with the outlet valve seat 510.

[0095] The refrigerant inlet pipe 420 and the refrigerant outlet pipe 520 are used for being connected with the thermal management system.

[0096] In the above embodiment, by adopting the arrangement of the inlet valve seat 410 and the refrigerant inlet pipe 420, the refrigerant inlet pipe 420 is facilitated to be communicated with the upper channel 1011 in the liquid cooling plate 100 through the inlet valve seat 410, and the arrangement of the inlet valve seat 410 improves the fixing strength of the refrigerant inlet pipe 420, so as to prevent the refrigerant inlet pipe 420 from being separated from the liquid cooling plate 100 due to vibration of the vehicle. Similarly, by adopting the arrangement of the outlet valve seat 510 and the refrigerant outlet pipe 520, the refrigerant outlet pipe 520 is facilitated to be communicated with the cooling channel 101 in the liquid cooling plate 100 through the outlet valve seat 510, and the arrangement of the outlet valve seat 510 improves the fixing strength of the refrigerant outlet pipe 520, so as to prevent the refrigerant outlet pipe 520 from being separated from the liquid cooling plate 100 due to vibration of the vehicle.

[0097] The refrigerant inlet 400 and the refrigerant outlet 500 are connected with the two connecting seats 600 one by one, which can be that the refrigerant inlet 400 and the refrigerant outlet 500 are bolted with the corresponding connecting seats 600.

[0098] In a specific implementation, the connecting seat 600 is welded to the side wall of the liquid cooling plate 100, and the connecting seat 600 has a passage therein. The coolant inlet pipe 420 is communicated with the upper passage 1011 through one of the connecting seats 600, and the coolant outlet pipe 520 is communicated with the lower passage 1012 through another connecting seat 600, which helps to improve the installation strength of the coolant inlet pipe 420 and the coolant outlet pipe 520 and improve the stability of the coolant inlet pipe 420 and the coolant outlet pipe 520.

[0099] In a possible implementation, the liquid cooling plate 100 further has a sensor (not shown in the figure) arranged on at least one of the coolant inlet pipe 420 and the coolant outlet pipe 520. In this embodiment, the sensor is a temperature sensor. In other embodiments, the sensor can also be a sensor for detecting the flow rate of the coolant, or a sensor for detecting leakage, and the number of sensors can be adjusted as needed, for example, a sensor is arranged at different positions on the coolant inlet pipe 420 and the coolant outlet pipe 520.

[0100] By adopting the above technical solution, the temperature or other characteristic factors in the coolant inlet pipe 420 and the coolant outlet pipe 520 can be detected by arranging the sensor, so that the flow rate of the coolant can be adjusted in time, thereby indirectly improving the heat dissipation efficiency of the liquid cooling plate 100 on the cell row 210.

[0101] The embodiments of the present application also provide an electric cell module, referring to Figure 1 The electric cell module includes at least one cell row 210 and the above-mentioned liquid cooling assembly abutting against the end of the cell row 210.

[0102] The specific structure of the liquid cooling assembly has been described in detail above, and will not be described in detail here. The electric cell module provided with the above-mentioned liquid cooling assembly can improve the cooling efficiency of the electric cell module.

[0103] In a possible implementation, the embodiments of the present application also provide a battery pack including a frame and at least one electric cell module provided in the frame. The electric cell module has been described above and will not be described here.

[0104] The implementation principle of the liquid cooling assembly, the cell module and the battery pack in the embodiment of the application is as follows: in the technical solution, the liquid cooling assembly comprises at least one liquid cooling plate 100, opposite sides of the liquid cooling plate 100 are used for abutting against the cell row 210, the liquid cooling plate 100 is internally provided with a cooling channel 101, the cooling channel 101 comprises an upper layer channel 1011 and a lower layer channel 1012 in communication with an outflow end of the upper layer channel 1011, the cross-sectional area of the upper layer channel 1011 is greater than that of the lower layer channel 1012, the cooling channel 101 is used for passing cooling liquid, and the cooling liquid flows out of the liquid cooling plate 100 in sequence through the upper layer channel 1011 and the lower layer channel 1012. By setting the cross-sectional area of the upper layer channel 1011 to be greater than that of the lower layer channel 1012, after the cooling liquid is passed into the cooling channel 101 of the liquid cooling plate 100, the cooling liquid located in the upper layer channel 1011 has a larger contact area with the liquid cooling plate 100, and the above setting mode is equivalent to making the cooling liquid with a lower temperature have a larger contact area with the liquid cooling plate 100, thereby improving the cooling effect of the cooling liquid on the cell row 210 and indirectly improving the cooling effect of the liquid cooling plate 100 on the cylindrical cell 211.

[0105] Other embodiments of the application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein.

[0106] It is intended to include all such variations and modifications in connection with the principles of the application as can be desired by the skilled person to adapt the application for particular applications. The specification and examples given are intended as illustrative only and not limiting of the true scope and spirit of the application as set forth in the claims.

[0107] It is to be understood that the application is not limited to the precise construction described and as shown in the attached drawings, and that various modifications and changes can be made by those skilled in the art without departing from the scope of the application. The scope of the application is limited only by the claims that follow.

Claims

1. A liquid cooling assembly for cooling a cell pack (210), characterized by, The application relates to a liquid cooling plate for a battery pack. The liquid cooling plate (100) is used for abutting against the battery cell row (210) on two opposite sides. The liquid cooling plate (100) is provided with a cooling channel (101). The cooling channel (101) comprises an upper layer channel (1011) and a lower layer channel (1012) in communication with the liquid outlet end of the upper layer channel (1011), and the upper layer channel (1011) is located on the upper portion of the lower layer channel (1012). The cooling channel (101) is used for passing cooling liquid, and the cooling liquid flows out of the liquid cooling plate (100) through the upper layer channel (1011) and the lower layer channel (1012) in sequence. The cross-sectional area of the upper layer channel (1011) is greater than that of the lower layer channel (1012).

2. The liquid-cooling assembly of claim 1, wherein, The upper layer channel (1011) and the lower layer channel (1012) are arranged in parallel to each other and extend along the length direction of the liquid cooling plate (100).

3. The liquid-cooling assembly of claim 1, wherein, The liquid cooling plate (100) is provided with a communication member (800) at one end, the communication member (800) is provided with a communication cavity, and the liquid outlet end of the upper layer channel (1011) is in communication with the liquid inlet end of the lower layer channel (1012) through the communication cavity.

4. The liquid-cooling assembly of claim 1, wherein, The upper layer channel (1011) and the lower layer channel (1012) each comprise a plurality of sub-channels (10) arranged in parallel to each other.

5. The liquid cooling assembly of claim 4, wherein, The sub-channels (10) of the upper layer channel (1011) and the lower layer channel (1012) are in communication with the communication cavity. The side wall of the communication member (800) is provided with a relief notch (810) for avoiding the battery cell row (210) so that the battery cell row (210) at the relief notch (810) abuts against the side wall of the liquid cooling plate (100).

6. The liquid cooling assembly of claim 4, wherein, The liquid cooling plate (100) is provided with a refrigerant inlet member (400) and a refrigerant outlet member (500).

7. The liquid cooling assembly of any one of claims 1 to 6, wherein, The refrigerant inlet member (400) is in communication with the liquid inlet end of the upper layer channel (1011), and the refrigerant outlet member (500) is in communication with the liquid outlet end of the lower layer channel (1012). The liquid inlet end of the upper layer channel (1011) and the liquid outlet end of the lower layer channel (1012) are located at the same end of the liquid cooling plate (100). The refrigerant inlet member (400) and the refrigerant outlet member (500) are used for being connected with a thermal management system so that the cooling liquid enters the upper layer channel (1011) through the refrigerant inlet member (400) and flows out of the lower layer channel (1012) from the refrigerant outlet member (500). The liquid cooling plate (100) is provided with at least two connecting seats (600).

8. The liquid cooling assembly of claim 7, wherein, The connecting seats (600) are connected with the side wall of the liquid cooling plate (100). The refrigerant inlet member (400) and the refrigerant outlet member (500) are connected with the two connecting seats (600) one by one respectively. ​ The coolant inlet member (400) is communicated with the upper layer channel (1011) through one of the connecting seats (600), and the coolant outlet member (500) is communicated with the lower layer channel (1012) through another connecting seat (600).

9. An electrochemical cell module, characterized by, The liquid cooling assembly comprises at least one battery cell row (210) and the liquid cooling assembly according to any one of claims 1 to 8.

10. A battery pack, characterized by, The battery cell module comprises a rack body and at least one battery cell module according to claim 9 arranged in the rack body.

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