Liquid cooling plate and battery pack

Abstract

The embodiment of the utility model provides a liquid cooling plate and a battery pack, the liquid cooling plate is provided with a liquid inlet and a liquid outlet, and the liquid cooling plate is internally provided with a first current collecting flow channel, a plurality of liquid inlet flow channels and a plurality of liquid outlet flow channels; the first ends of the multiple liquid inlet flow channels are communicated with the liquid inlet in parallel, the second ends of the multiple liquid inlet flow channels are connected to the first end of the first flow collecting flow channel in parallel, the first ends of the liquid outlet flow channels are connected to the second end of the first flow collecting flow channel in parallel, and the second ends of the liquid outlet flow channels are communicated with the liquid outlet in parallel. The multiple parallel liquid inlet flow channels converge to the flow collecting flow channel, liquid is fully mixed, the pressure difference in the different liquid inlet flow channels and the non-uniformity of flow distribution are balanced, the flow collecting flow channel communicates with the multiple parallel liquid outlet flow channels, the liquid is redistributed to the multiple liquid outlet flow channels, and the flow and pressure drop of the different liquid outlet flow channels tend to be consistent. The liquid cooling plate is beneficial to more uniform distribution of the cooling liquid in the flow channel, and the flow and the pressure drop are more balanced, namely, the temperature uniformity of the liquid cooling plate is improved.

Description

Technical Field

[0001] This utility model belongs to the field of energy storage battery technology, specifically relating to a liquid cooling plate and battery pack. Background Technology

[0002] With the development of energy storage technology, the energy density of battery packs is getting higher and higher, and the heat generation is gradually increasing. Liquid cooling plates are usually used to cool down the battery packs.

[0003] The uneven heat distribution is caused by the different placement of the battery packs relative to the liquid cooling plate: when the battery packs are densely arranged in the middle, the heat tends to concentrate in the center of the liquid cooling plate; when the battery packs are placed on the sides, the sides of the liquid cooling plate generate more heat. The required heat dissipation efficiency varies depending on the location of the liquid cooling plate.

[0004] The flow channels designed in related technologies cannot solve the problem of uneven heat distribution, that is, the temperature uniformity of the liquid cooling plate is poor. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a liquid cooling plate and battery pack that can solve the problem of poor temperature uniformity of liquid cooling plates in related technologies.

[0006] To solve the above-mentioned technical problems, this utility model is implemented as follows:

[0007] This utility model embodiment provides a liquid cooling plate, which has a liquid inlet and a liquid outlet, and the liquid cooling plate is provided with a first flow channel, multiple liquid inlet channels and multiple liquid outlet channels inside;

[0008] The first ends of the plurality of liquid inlet channels are connected in parallel to the liquid inlet, the second ends of the plurality of liquid inlet channels are connected in parallel to the first end of the first collection channel, the first ends of the plurality of liquid outlet channels are connected in parallel to the second end of the first collection channel, and the second ends of the plurality of liquid outlet channels are connected in parallel to the liquid outlet.

[0009] Optionally, a second flow channel is also provided inside the liquid cooling plate;

[0010] The first end of the second collection channel is connected to the liquid inlet, and the first ends of multiple liquid inlet channels are connected in parallel to the second end of the second collection channel.

[0011] Optionally, a third flow channel is also provided inside the liquid cooling plate;

[0012] The second ends of the plurality of liquid outlet channels are connected in parallel to the first end of the third collection channel, and the second end of the third collection channel is connected to the liquid outlet.

[0013] Optionally, the liquid inlet channel includes at least two first sub-channels and at least two second sub-channels;

[0014] The first sub-channel extends along a first direction, and the second sub-channel extends along a second direction. The first sub-channel and the second sub-channel are alternately distributed and connected end to end. The liquid inlet channel spirals around the center of the liquid cooling plate. The first direction intersects the second direction.

[0015] Optionally, the plurality of liquid inlet channels are a first liquid inlet channel, a second liquid inlet channel, a third liquid inlet channel, and a fourth liquid inlet channel.

[0016] Optionally, the plurality of liquid outlet channels extend along one of the first direction or the second direction, and the first collection channel extends along the other of the first direction or the second direction.

[0017] Optionally, the second collector channel includes an inlet sub-channel and a first collector sub-channel;

[0018] One end of the inlet sub-channel is connected to the liquid inlet, and the other end is connected to one end of the first collector sub-channel. The first ends of the plurality of liquid inlet channels are connected in parallel to the other end of the first collector sub-channel, and the inlet sub-channel intersects the extension direction of the first collector channel.

[0019] Optionally, the third collector channel includes an outflow sub-channel and a second collector sub-channel;

[0020] One end of the outflow sub-channel is connected to the liquid outlet, and the other end is connected to one end of the second collector sub-channel. The second ends of the plurality of liquid outlet channels are connected in parallel to the other end of the second collector sub-channel. The outflow sub-channel and the extension direction of the second collector sub-channel intersect.

[0021] Optionally, the liquid cooling plate includes a first cooling plate and a second cooling plate;

[0022] The first cold plate includes a cold plate body and flow channel ribs disposed on the cold plate body. The flow channel ribs, the cold plate body and the second cold plate surround to form the flow channel. The liquid inlet and the liquid outlet are disposed on the second cold plate.

[0023] This utility model embodiment also provides a battery pack, including a battery group and the liquid cooling plate described in any of the above claims;

[0024] The battery pack is fixed to the surface of the liquid cooling plate.

[0025] In this embodiment of the invention, the liquid cooling plate has internal flow channels, including a first collecting channel, multiple inlet channels, and multiple outlet channels. Liquid flowing in through the inlet is diverted to the first ends of the multiple inlet channels, then converges from the second ends of the inlet channels to the first end of the first collecting channel. Subsequently, it is diverted again from the second end of the first collecting channel to the multiple outlet channels. The second ends of the multiple outlet channels are connected in parallel to the outlet, and the liquid finally flows out of the liquid cooling plate from the outlet, achieving the cooling effect of the battery pack. The multiple parallel inlet channels converge into the collecting channel, which thoroughly mixes the liquid, balances the pressure difference within the different inlet channels, and eliminates the uneven flow distribution within the different inlet channels. The collecting channel is connected to the multiple parallel outlet channels, redistributing the liquid to the multiple outlet channels, making the flow rate and pressure drop of the different outlet channels more consistent. This design allows the coolant to be distributed more evenly in the flow channel, and the flow rate and pressure drop are more balanced, which improves the temperature uniformity of the liquid cooling plate. It is suitable for battery packs with uneven heat distribution and avoids excessive heat concentration in local areas, which would affect the heat dissipation effect.

[0026] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0027] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0028] Figure 1 This is a schematic diagram of the disassembled liquid cooling plate provided in this embodiment of the utility model;

[0029] Figure 2 This is a schematic diagram of the flow channel according to an embodiment of the present utility model;

[0030] Figure 3 This is a schematic diagram of the battery pack structure provided in an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] 1-Liquid cooling plate, 101-Liquid inlet, 102-Liquid outlet, 103-First cooling plate, 1031-Flow channel rib, 104-Second cooling plate, 11-First manifold channel, 12-Liquid inlet channel, 12a-First liquid inlet channel, 12b-Second liquid inlet channel, 12c-Third liquid inlet channel, 12d-Fourth liquid inlet channel, 121-First sub-channel, 122-Second sub-channel, 13-Liquid outlet channel, 1 3a - First liquid outlet channel, 13b - Second liquid outlet channel, 13c - Third liquid outlet channel, 13d - Fourth liquid outlet channel, 13e - Fifth liquid outlet channel, 13f - Sixth liquid outlet channel, 14 - Second current collector channel, 141 - Inlet current collector channel, 142 - First current collector channel, 15 - Third current collector channel, 151 - Outlet current collector channel, 152 - Second current collector channel, 2 - Battery pack, 3 - Thermal conductive adhesive. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0034] The terms "first," "second," etc., used in the specification and claims of this utility model are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of this utility model can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, the first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0035] Please refer to Figures 1 to 2 As shown in the diagram, the liquid cooling plate has an inlet 101 and an outlet 102. The liquid cooling plate is provided with a first collecting channel 11, multiple inlet channels 12 and multiple outlet channels 13. The first ends of the multiple inlet channels 12 are connected in parallel to the inlet 101, the second ends of the multiple inlet channels 12 are connected in parallel to the first end of the first collecting channel 11, the first ends of the multiple outlet channels 13 are connected in parallel to the second end of the first collecting channel 11, and the second ends of the multiple outlet channels 13 are connected in parallel to the outlet 102.

[0036] Specifically, the liquid cooling plate has internal channels for coolant flow, including a first collecting channel 11, multiple inlet channels 12, and multiple outlet channels 13. The liquid cooling plate has an inlet 101 and an outlet 102. The inlet 101 allows coolant to flow in, and the coolant, after heat exchange with the battery pack through the channels, flows out through the outlet 102. The inlet 101 and outlet can be located on the same side or different sides of the liquid cooling plate, depending on the actual battery pack installation requirements. The channels include the first collecting channel 11, multiple inlet channels 12, and multiple outlet channels 13. The liquid cooling plate can be integrally formed to create the internal channels, or the channels can be stamped onto the channel plate and then brazed to a cover plate to form the liquid cooling plate. The number of inlet channels 12 and outlet channels 13 can be two, three, or more, depending on the actual heat dissipation of the battery pack. Multiple inlet channels 12 are connected in parallel, with their first ends all connected to inlet ports 101. For example, the first end of each inlet channel 12 can be directly connected to the inlet port 101, or indirectly connected to the inlet port 101 via a collection channel. The inlet channels 12 can be strip-shaped, extending in the same direction, or ring-shaped or spiral-shaped, extending in at least two directions to increase the flow path. The second ends of each inlet channel 12 are connected to the first end of the first collection channel 11. Multiple outlet channels 13 are parallel and connected in parallel, with their first ends all connected to the second end of the first collection channel 11. Their second ends are all connected to outlet ports 102. For example, the second end of each outlet channel 13 can be directly connected to the outlet port 102, or indirectly connected to the outlet port 102 via a collection channel. Different heat dissipation requirements can be adapted by designing the length and shape of the inlet channels 12 and outlet channels 13. It should be noted that in this specification, the first end of the flow channel is the upstream end in the direction of liquid flow, and the second end is the downstream end in the direction of liquid flow.

[0037] The coolant flowing in from the inlet 101 is divided into multiple inlet channels 12. The coolant flows in the inlet channels 12 and converges into the first collector channel 11. Then, it is divided again from the first collector channel 11 into multiple outlet channels 13. After flowing in the outlet channels 13, the liquid finally flows out from the outlet 102. During the flow, the liquid exchanges heat with the battery pack fixed on the liquid cooling plate. The liquid temperature rises and the battery pack temperature drops to a safe operating temperature, thus achieving overall cooling of the battery pack.

[0038] In related technologies, only multiple parallel flow channels are designed, which can easily lead to uneven flow distribution among the channels due to differences in path length, resistance, or inlet effect. The liquid cooling plate of this invention integrates multiple parallel inlet channels into a collecting channel. The collecting channel thoroughly mixes the liquid, balances the pressure difference between different inlet channels, eliminates uneven flow distribution, and shortens the single-pass channel length, reducing flow resistance. The collecting channel connects to multiple parallel outlet channels, redistributing the liquid to them, making the flow rate and pressure drop of different outlet channels more consistent, avoiding local high-pressure areas, and reducing the overall pressure drop of the channel. This design results in a more uniform distribution of coolant in the channels and a more balanced flow rate and pressure drop, thus improving the temperature uniformity of the liquid cooling plate. It is suitable for heat sources with high heat generation and uneven heat distribution, such as electronic chips, battery packs, or high-power IGBTs (Insulated Gate Bipolar Transistors), preventing excessive heat concentration in local areas from affecting heat dissipation. It can provide a good working environment for the battery pack and extend the battery pack's lifespan.

[0039] In one implementation method, please refer to Figure 2 As illustrated, the liquid cooling plate of this utility model embodiment is further provided with a second flow channel 14; the first end of the second flow channel 14 is connected to the liquid inlet 101, and the first ends of multiple liquid inlet channels 12 are connected in parallel to the second end of the second flow channel 14.

[0040] Specifically, the first end of the second manifold 14 is connected to the liquid inlet 101, and the second end is connected to the first end of a plurality of parallel liquid inlet channels 12. Liquid entering from the liquid inlet 101 flows through the second manifold 14 and is distributed into the plurality of liquid inlet channels 12. This embodiment, by setting a manifold channel at the liquid inlet of the liquid cooling plate, concentrates the liquid before distributing it to different liquid inlet channels 12, reducing the initial unevenness of the distribution and mitigating the impact of uneven flow distribution caused by differences in flow resistance among the multiple parallel channels, thereby improving the temperature uniformity of the liquid cooling plate.

[0041] In one implementation method, please refer to Figure 2 As illustrated, the liquid cooling plate of this utility model embodiment is further provided with a third flow channel 15; the second ends of multiple liquid outlet channels 13 are connected in parallel to the first end of the third flow channel 15, and the second end of the third flow channel 15 is connected to the liquid outlet 102.

[0042] Specifically, the first end of the third manifold 15 is connected to multiple parallel liquid outlet channels 13, and the second end is connected to the liquid outlet 102. Liquid entering from the inlet 101 flows through the second manifold 14, initially diverted into multiple inlet channels 12, initially converged into the first manifold 11, then diverted again into multiple liquid outlet channels 13, and finally converged into the third manifold 15, exiting from the liquid outlet 102. This embodiment, by setting a manifold channel at the liquid outlet of the liquid cooling plate, collects the liquid from multiple liquid outlet channels 13, avoiding pressure imbalance caused by differences in flow velocity in the liquid outlet channels 13, thus improving the temperature uniformity of the liquid cooling plate.

[0043] In one implementation method, please refer to Figure 2 As shown in the diagram, the liquid inlet channel 12 includes at least two first sub-channels 121 and at least two second sub-channels 122; the first sub-channels 121 extend along a first direction, and the second sub-channels 122 extend along a second direction. The first sub-channels 121 and the second sub-channels 122 are alternately distributed and connected end to end. The liquid inlet channel 12 spirals around the center of the liquid cooling plate, and the first direction intersects with the second direction.

[0044] Specifically, the liquid inlet channel 12 extends spirally around the center of the liquid cooling plate, which can take into account the heat dissipation needs of different positions of the liquid cooling plate and improve space utilization. In this embodiment, the liquid inlet channel 12 includes three first sub-channels 121 and two second sub-channels 122. The first sub-channels 121 and second sub-channels 122 are arranged alternately and connected end-to-end, so that the liquid inlet channel 12 extends around the center position and finally converges to the first collecting channel 11. The first direction intersects the second direction, that is, the angle formed between the first direction and the second direction can be 60°, 70°, 80° or 90°. In this embodiment, the first direction is along the X direction, and the second direction is along the Y direction, and the first direction and the second direction are orthogonal. The first sub-channels 121 of different liquid inlet channels 12 are equidistantly distributed, and the second sub-channels 122 of different liquid inlet channels 12 are equidistantly distributed. Because the flow velocities of the first sub-channel 121 connected to the inlet section and the second sub-channel 122 connected to the first sub-channel 121 of the inlet section are faster than those in other areas, the heat dissipation capacity is stronger. Simultaneously, combined with... Figure 3As shown, since the battery pack 2 is arranged on its side, the battery pack is concentrated in the middle of the liquid cooling plate 1. No battery pack is arranged near the end of the liquid cooling plate 1 along the X-axis to the right. Therefore, the heat dissipation requirement in this area is relatively weak. To improve the overall temperature uniformity of the liquid cooling plate, the heat dissipation of the second sub-channel 122 connected to the first sub-channel 121 of the inlet section, i.e., the area of ​​the second sub-channel 122 along the X-axis to the right of the liquid cooling plate 1, can be appropriately reduced. Under the premise that the position of the second sub-channel 122 along the X-axis to the right of the fourth inlet channel 12d and the number of inlet channels 12 remain unchanged, by reducing the distance between the different second sub-channels 122 along the X-axis to the right—that is, by bringing the second sub-channels 122 of the first inlet channel 12a, the second inlet channel 12b, and the third inlet channel 12c closer to the middle of the liquid cooling plate—the heat dissipation of the liquid cooling plate at the right end along the X-axis can be reduced.

[0045] In one implementation method, please refer to Figure 2 The diagram shows that the multiple liquid inlet channels 12 are the first liquid inlet channel 12a, the second liquid inlet channel 12b, the third liquid inlet channel 12c, and the fourth liquid inlet channel 12d.

[0046] Specifically, to enhance the secondary diversion effect, the number of outlet channels 13 is usually designed to be greater than the number of inlet channels 12. This embodiment features four parallel inlet channels 12 extending in the same direction: a first inlet channel 12a, a second inlet channel 12b, a third inlet channel 12c, and a fourth inlet channel 12d. It also features six parallel outlet channels 13: a first outlet channel 13a, a second outlet channel 13b, a third outlet channel 13c, a fourth outlet channel 13d, a fifth outlet channel 13e, and a sixth outlet channel 13f. Therefore, the second manifold 14, the first inlet manifold 12a, the first manifold 11, any one outlet manifold 13, and the third manifold 15 form a coolant circuit; the second manifold 14, the second inlet manifold 12b, the first manifold 11, any one outlet manifold 13, and the third manifold 15 form a coolant circuit; the second manifold 14, the third inlet manifold 12c, the first manifold 11, any one outlet manifold 13, and the third manifold 15 form a coolant circuit; the second manifold 14, the fourth inlet manifold 12b, the first manifold 11, any one outlet manifold 13, and the third manifold 15 form a coolant circuit.

[0047] In actual implementation, considering the different positions of the battery pack on the liquid cooling plate, the number of liquid outlet channels 13 and liquid inlet channels 12 can be adjusted accordingly: when the battery pack is concentrated on the side of the liquid cooling plate, the number of liquid inlet channels 12 can be increased and the number of liquid outlet channels 13 can be reduced; when the battery pack is concentrated in the middle of the liquid cooling plate, the number of liquid outlet channels 13 can be increased and the number of liquid inlet channels 12 can be reduced.

[0048] In one implementation method, please refer to Figure 2 As illustrated in Embodiment 4 above, multiple liquid outlet channels 13 extend along one of the first or second directions, and the first collection channel 11 extends along the other of the first or second directions.

[0049] Specifically, when the outlet flow channel 13 extends along the first direction X, the first collecting flow channel 11 extends along the second direction Y; when the outlet flow channel 13 extends along the second direction Y, the first collecting flow channel 11 extends along the first direction X. The outlet flow channel 13 and the first collecting flow channel 11 extend in orthogonal directions, which facilitates the connection of multiple parallel outlet flow channels 13 with the first collecting flow channel 11. On the one hand, this avoids the need to increase the width of the first collecting flow channel 11 to achieve simultaneous connection with multiple parallel outlet flow channels 13. On the other hand, changing the flow direction helps to improve space utilization.

[0050] In one implementation method, please refer to Figure 2 As illustrated in Embodiment 2 above, the second flow channel 14 includes an inlet sub-channel 141 and a first flow channel 142; one end of the inlet sub-channel 141 is connected to the liquid inlet 101, and the other end is connected to one end of the first flow channel 142; the first ends of multiple liquid inlet channels 12 are connected in parallel to the other end of the first flow channel 142; the extension directions of the inlet sub-channel 141 and the first flow channel 142 intersect.

[0051] Specifically, the coolant flowing in from the inlet 101 flows sequentially through the inlet sub-channel 141 and the first collector sub-channel 142, entering multiple inlet channels 12. The extension direction of the inlet sub-channel 141 forms a certain angle with the X and Y directions, the extension direction of the first collector sub-channel 142 is along the second direction Y, and the extension direction of the first inlet sub-channel 121 is along the first direction X. This facilitates the connection of the first collector sub-channel 142 with multiple parallel inlet channels 12, and by changing the extension direction of the second collector channel 14, the flow path is lengthened, and the flow resistance is balanced.

[0052] In one implementation method, please refer to Figure 2As illustrated in Embodiment 3 above, the third flow channel 15 includes an outflow sub-channel 151 and a second flow channel 152; one end of the outflow sub-channel 151 is connected to the liquid outlet 102, and the other end is connected to one end of the second flow channel 152; the second ends of multiple liquid outlet channels 13 are connected in parallel to the other end of the second flow channel 152; and the extending directions of the outflow sub-channel 151 and the second flow channel 152 intersect.

[0053] Specifically, the coolant flowing from multiple outlet channels sequentially passes through the second collector channel 152 and the outlet channel 151, and exits from the outlet 102. The extension direction of the outlet channel 151 forms a certain angle with the X and Y directions, the extension direction of the second collector channel 152 is along the second direction (Y), and the extension direction of the outlet channel 151 is along the first direction (X). This facilitates the connection of the second collector channel 152 with multiple parallel outlet channels 13, and by changing the extension direction of the third collector channel 15, the flow path is lengthened, and the flow resistance is balanced.

[0054] In one implementation method, please refer to Figure 2 As illustrated, the liquid cooling plate of this utility model embodiment includes a first cold plate 103 and a second cold plate 104; the first cold plate 103 includes a cold plate body and a flow channel rib 1031 disposed on the cold plate body, the flow channel rib 1031, the cold plate body and the second cold plate 104 surround to form a flow channel, and the liquid inlet 101 and the liquid outlet 102 are disposed on the second cold plate 104.

[0055] Specifically, the first cold plate 103, also known as the flow channel plate, consists of a cold plate body and flow channel ribs 1031 disposed on the cold plate body. The shape and trend of the flow channel ribs 1031 are based on the flow channel design. The second cold plate 104, also known as the cover plate, is formed by brazing the first cold plate 103 and the second cold plate 104 together to form the liquid-cooled plate 1. The flow channel ribs 1031, the cold plate body, and the second cold plate 104 enclose a flow channel, including a first collecting flow channel 11, a liquid inlet flow channel 12, a liquid outlet flow channel 13, a second collecting flow channel 14, and a third collecting flow channel 15. The second cold plate 104 has a liquid inlet 101 and a liquid outlet 102.

[0056] In one implementation method, please refer to Figure 3 As illustrated, this utility model embodiment also provides a battery pack, including a battery pack 2 and a liquid cooling plate 1 as described in any of the above embodiments; the battery pack 2 is fixed to the surface of the liquid cooling plate 1.

[0057] Specifically, the battery pack 2 is fixed to the upper surface of the liquid cooling plate 1, and the battery pack 2 and the liquid cooling plate 1 are connected by thermally conductive adhesive 3 to improve heat dissipation efficiency. Using the liquid cooling plate with good temperature uniformity in this embodiment can solve the problem of uneven heat distribution in the battery pack, avoid excessive heat concentration in local areas which would affect heat dissipation, and thus improve the safety and lifespan of the battery pack.

[0058] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention.

[0059] The terms "first" and "second" in the specification and claims of this utility model may explicitly or implicitly include one or at least two of the features. In the description of this utility model, unless otherwise stated, "at least two" means two or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0060] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "left", "right", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A liquid-cooled plate, characterized in that, The liquid cooling plate is provided with an inlet (101) and an outlet (102), and the liquid cooling plate is provided with a first flow channel (11), multiple inlet channels (12) and multiple outlet channels (13); The first ends of the plurality of liquid inlet channels (12) are connected in parallel to the liquid inlet (101), the second ends of the plurality of liquid inlet channels (12) are connected in parallel to the first end of the first collection channel (11), the first ends of the plurality of liquid outlet channels (13) are connected in parallel to the second end of the first collection channel (11), and the second ends of the plurality of liquid outlet channels (13) are connected in parallel to the liquid outlet (102).

2. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate is also provided with a second flow channel (14); The first end of the second collection channel (14) is connected to the liquid inlet (101), and the first ends of the plurality of liquid inlet channels (12) are connected in parallel to the second end of the second collection channel (14).

3. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate is also provided with a third flow channel (15); The second ends of the plurality of liquid outlet channels (13) are connected in parallel to the first end of the third collection channel (15), and the second end of the third collection channel (15) is connected to the liquid outlet (102).

4. The liquid cooling plate according to claim 1, characterized in that, The liquid inlet channel (12) includes at least two first sub-channels (121) and at least two second sub-channels (122); The first sub-channel (121) extends along a first direction, and the second sub-channel (122) extends along a second direction. The first sub-channel (121) and the second sub-channel (122) are alternately distributed and connected end to end. The liquid inlet channel (12) spirals around the center of the liquid cooling plate. The first direction intersects the second direction.

5. The liquid cooling plate according to claim 1, characterized in that, The plurality of liquid inlet channels (12) are a first liquid inlet channel (12a), a second liquid inlet channel (12b), a third liquid inlet channel (12c) and a fourth liquid inlet channel (12d).

6. The liquid cooling plate according to claim 4, characterized in that, The plurality of liquid outlet channels (13) extend in one of the first direction or the second direction, and the first collection channel (11) extends in the other of the first direction or the second direction.

7. The liquid cooling plate according to claim 2, characterized in that, The second collector channel (14) includes an inlet sub-channel (141) and a first collector sub-channel (142); One end of the inlet sub-channel (141) is connected to the liquid inlet (101), and the other end is connected to one end of the first collector sub-channel (142). The first ends of the plurality of liquid inlet channels (12) are connected in parallel to the other end of the first collector sub-channel (142). The inlet sub-channel (141) and the first collector sub-channel (142) intersect in their respective extension directions.

8. The liquid cooling plate according to claim 3, characterized in that, The third collector channel (15) includes an outflow sub-channel (151) and a second collector sub-channel (152); One end of the outflow sub-channel (151) is connected to the liquid outlet (102), and the other end is connected to one end of the second collection sub-channel (152). The second ends of the plurality of liquid outlet channels (13) are connected in parallel to the other end of the second collection sub-channel (152). The outflow sub-channel (151) and the second collection sub-channel (152) intersect in their extending directions.

9. The liquid cooling plate according to claim 1, characterized in that, The liquid cooling plate includes a first cooling plate (103) and a second cooling plate (104); The first cold plate (103) includes a cold plate body and a flow channel rib (1031) disposed on the cold plate body. The flow channel rib (1031), the cold plate body and the second cold plate (104) surround to form the flow channel. The liquid inlet (101) and the liquid outlet (102) are disposed on the second cold plate (104).

10. A battery pack, characterized in that, Includes a battery pack (2) and a liquid cooling plate (1) as described in any one of claims 1-9; The battery pack (2) is fixed to the surface of the liquid cooling plate (1).

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