Liquid cooling plate, battery pack and electrical device

Abstract

A liquid cooling plate, a battery pack and an electrical device. The liquid cooling plate comprises a flat plate, a flow channel plate and a flow channel tension plate, wherein the flow channel plate is arranged between the flat plate and the flow channel tension plate, the flow channel tension plate is fixed on an upper side of the flow channel plate in a fitting manner, or the flow channel tension plate is connected to the upper side of the flow channel plate, and an upper flow channel is enclosed by means of the flow channel tension plate and the flow channel plate; and the flat plate is connected to a lower side of the flow channel plate, and a lower flow channel is enclosed by means of the flat plate and the flow channel plate.

Description

Liquid cooling plate, battery pack and electrical equipment

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 2024205560460, entitled “Liquid cooling plate, battery pack and electrical equipment,” filed with the China Patent Office on March 20, 2024, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the technical field of battery packs, and in particular to a liquid cooling plate, a battery pack, and an electrical device. Background Art

[0004] In the related art, in a double-layer battery, a cold plate is arranged between the two layers of batteries in the battery pack, wherein the battery cells of the lower battery are directly bonded to the cold plate through thermal conductive glue for heat conduction and heat dissipation, and the battery cells of the upper battery are first bonded to the pull plate through thermal conductive glue, and then the pull plate and the cold plate are bonded and fixed with thermal conductive glue. This results in two layers of thermal conductive glue being arranged between the upper battery and the cold plate, resulting in the upper battery having a greater heat transfer resistance than the lower battery. As a result, when the battery pack is charged and discharged, the temperature of the upper battery is higher than that of the lower battery, which increases the charging time, limits the discharge power, and the performance of the lower battery cannot be fully utilized. Summary of the Invention

[0005] The present disclosure aims to provide a liquid cooling plate, a battery pack and an electrical device, wherein the liquid cooling plate is suitable for a battery pack including double-layer batteries and can solve the technical problem that the temperature of the upper battery is higher than that of the lower battery.

[0006] In order to achieve the above-mentioned purpose, the present disclosure provides a liquid cooling plate, including a flat plate, a flow channel plate and a flow channel pull plate, wherein the flow channel plate is arranged between the flat plate and the flow channel pull plate, wherein the flow channel pull plate is fitfully fixed on the upper side of the flow channel plate, or the flow channel pull plate is connected to the upper side of the flow channel plate, and the flow channel pull plate and the flow channel plate form an upper flow channel; the flat plate is connected to the lower side of the flow channel plate, and the flat plate and the flow channel plate form a lower flow channel.

[0007] Optionally, the flow channel pull plate and the flow channel plate form an upper flow channel, and a connecting hole is provided on the flow channel plate, and the connecting hole connects the upper flow channel and the lower flow channel.

[0008] Optionally, there are multiple connecting holes, including at least one first connecting hole and at least one second connecting hole, the first connecting hole allows the medium in the lower layer flow channel to flow into the upper layer flow channel, and the second connecting hole allows the medium in the upper layer flow channel to flow into the lower layer flow channel.

[0009] Optionally, a first convex bulge and a first concave bulge are provided on the flow channel pull plate, a first mating plane is formed on the upper side of the flow channel plate, the first concave bulge is welded to the first mating plane, and the first convex bulge and the first mating plane form the upper flow channel, or, the flow channel pull plate has a second mating plane, a second convex bulge and a second concave bulge are provided on the flow channel plate, the second mating plane is welded to the second convex bulge, and the second mating plane and the second concave bulge form the upper flow channel, or, a first convex bulge and a first concave bulge are provided on the flow channel pull plate, a second convex bulge and a second concave bulge are provided on the flow channel plate, the first concave bulge and the second convex bulge are welded, and the first convex bulge and the second concave bulge form the upper flow channel.

[0010] Optionally, a third mating plane is formed on the lower side of the flow channel plate, a third convex bulge and a third concave bulge are provided on the flat plate, the third mating plane is welded to the third convex bulge, and the third mating plane and the third concave bulge are surrounded by the lower flow channel, or a second convex bulge and a second concave bulge are provided on the flow channel plate, the flat plate has a fourth mating plane, the second concave bulge is welded to the fourth mating plane, and the second convex bulge and the fourth mating plane are surrounded by the lower flow channel, or a third convex bulge and a third concave bulge are provided on the flat plate, a second convex bulge and a second concave bulge are provided on the flow channel plate, the third convex bulge and the second concave bulge are welded, and the third concave bulge and the second convex bulge are surrounded by the lower flow channel.

[0011] Optionally, a first convex bulge and a first concave bulge are provided on the flow channel pull plate, a first mating plane is formed on the upper side of the flow channel plate, the first concave bulge is welded to the first mating plane, and the first convex bulge and the first mating plane form the upper flow channel; a third mating plane is formed on the lower side of the flow channel plate, a third convex bulge and a third concave bulge are provided on the flat plate, the third mating plane is welded to the third convex bulge, and the third mating plane and the third concave bulge form the lower flow channel; the connecting hole is provided on the part of the flow channel plate located between the first convex bulge and the third concave bulge.

[0012] Optionally, a second convex hump and a second concave hump are provided on the flow channel plate, the second convex hump and the flat plate form the lower flow channel, the second concave hump and the flow channel pull plate form the upper flow channel, and the adjacent second convex hump and second concave hump are connected by vertical ribs, and the connecting hole is opened on the vertical ribs.

[0013] Optionally, the liquid cooling plate further includes a joint, which is connected to the lower flow channel.

[0014] According to a second aspect of the present disclosure, a battery pack is provided, comprising an upper battery, a lower battery, and the above-mentioned liquid cooling plate, wherein the liquid cooling plate is arranged between the upper battery and the lower battery, and the projection of the upper battery on the flat plate partially covers the projection of the lower battery on the flat plate, wherein the upper battery is connected to the flow channel pull plate via thermally conductive adhesive, and the lower battery is connected to the flat plate via thermally conductive adhesive.

[0015] Optionally, the upper battery includes an upper cell, an upper pull plate and two end plates, the upper cell is arranged on the flow channel pull plate, and the two end plates are arranged on both longitudinal sides of the upper cell, wherein the end plate is fixedly connected to the flow channel pull plate, the upper pull plate is buckled above the upper cell, and the upper pull plate is fixedly connected to the end plates.

[0016] Optionally, the battery pack includes a tray, and end beams are respectively provided on both lateral sides of the tray, and both lateral ends of the end plate are also fixedly connected to the corresponding end beams.

[0017] Optionally, the battery pack includes an upper cover, the tray is connected to the upper cover and encloses a receiving space, and the upper battery, the lower battery and the liquid cooling plate are arranged in the receiving space.

[0018] According to a third aspect of the present disclosure, there is provided an electric device comprising the above-mentioned battery pack.

[0019] Through the above technical solution, when the liquid cooling plate is used, in one way, the flow channel pull plate is connected to the upper side of the flow channel plate to form an upper flow channel, and the flat plate and the flow channel plate form a lower flow channel. At this time, the flow channel pull plate can serve as the bottom pull plate structure of the upper battery and at the same time as a structure surrounding the upper flow channel. In this way, the upper battery can exchange heat with the liquid cooling plate through only one layer of thermal conductive glue; similarly, the flat plate serves as a structure surrounding the lower flow channel, so that the lower battery can also exchange heat with the liquid cooling plate through only one layer of thermal conductive glue; in another way, the flat plate and the flow channel plate still form a lower flow channel, and the flow channel The pull plate is directly attached and fixed to the upper side of the flow channel plate, that is, no thermal conductive glue or other connecting structure is provided between the flow channel pull plate and the flow channel plate, and the flow channel pull plate and the flow channel plate are directly fixed by welding or other methods. At this time, the upper battery also exchanges heat with the liquid cooling plate through only a layer of thermal conductive glue. Therefore, such a setting can make the heat transfer resistance of the upper battery and the lower battery consistent, and can avoid the temperature of the upper battery being higher than that of the lower battery during charging and discharging of the battery pack. Even if the temperature of the upper battery and the lower battery is consistent, it can avoid the occurrence of problems such as increased charging time, limited discharge power, and inability to fully utilize the performance of the lower battery. In addition, compared with the embodiment of providing liquid cooling plates for the upper battery and the lower battery separately, the setting of a single liquid cooling plate disclosed in the present invention can simultaneously achieve heat exchange with the upper battery and the lower battery, thereby reducing the volume occupied by the liquid cooling plate in the battery pack, improving the volume utilization rate of the battery pack, and further improving the capacity of the battery.

[0020] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following detailed description, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0022] FIG1 is a schematic structural diagram of a battery pack provided by an exemplary embodiment of the present disclosure;

[0023] FIG2 is a schematic structural diagram of a liquid cooling plate provided by an exemplary embodiment of the present disclosure;

[0024] FIG3 is a schematic cross-sectional view of a liquid cooling plate provided by an exemplary embodiment of the present disclosure;

[0025] FIG4 is a schematic structural diagram of a flow channel plate in a liquid cooling plate provided by an exemplary embodiment of the present disclosure;

[0026] FIG5 is a schematic structural diagram of a flat plate in a liquid cooling plate provided by an exemplary embodiment of the present disclosure;

[0027] FIG6 is a schematic structural diagram of a flow channel pull plate in a liquid cooling plate provided by an exemplary embodiment of the present disclosure;

[0028] FIG7 is a schematic structural diagram of a liquid cooling plate provided by another exemplary embodiment of the present disclosure;

[0029] FIG8 is a cross-sectional schematic diagram of a liquid cooling plate provided by another exemplary embodiment of the present disclosure;

[0030] FIG9 is a schematic structural diagram of a flow channel plate in a liquid cooling plate provided by another exemplary embodiment of the present disclosure;

[0031] FIG10 is a schematic cross-sectional view of a liquid cooling plate provided by another exemplary embodiment of the present disclosure;

[0032] FIG11 is a schematic structural diagram of a liquid cooling plate, upper batteries, and lower batteries in a battery pack provided by an exemplary embodiment of the present disclosure;

[0033] FIG. 12 is a schematic structural diagram of an upper battery in a battery pack according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0034] The following describes the specific embodiments of the present disclosure in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present disclosure and are not intended to limit the present disclosure.

[0035] In the present disclosure, unless otherwise specified, the directional words used, such as "horizontal, vertical, up and down directions", are defined based on the XYZ coordinate system in Figure 1. Specifically, the X direction refers to the horizontal direction, the Y direction refers to the vertical direction, and the Z direction refers to the up and down directions. The side pointed by the arrow is up, and the opposite is down. In addition, the up and down directions also correspond to the direction of gravity of the liquid cooling plate. In addition, the terms "first", "second", etc. used in the present disclosure are to distinguish one element from another and do not have order or importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure marks in different drawings represent the same or similar elements. The above definitions are only used to explain and illustrate the present disclosure and should not be understood as limitations on the present disclosure.

[0036] To increase battery capacity and battery life, new energy vehicle power batteries are typically stacked in double or multiple layers. However, stacking double or multiple layers increases the difficulty of dissipating heat from the battery pack. The following description uses a double-layer battery as an example and does not limit the present disclosure. The liquid cooling plate provided herein is also applicable to battery packs with multiple layers of stacked batteries.

[0037] In an exemplary embodiment of the present disclosure, a liquid cooling plate is provided. Referring to Figures 1 to 10, the liquid cooling plate includes a flat plate 1, a flow channel plate 2 and a flow channel pull plate 3. The flow channel plate 2 is arranged between the flat plate 1 and the flow channel pull plate 3, wherein the flow channel pull plate 3 is fitly fixed on the upper side of the flow channel plate 2, or the flow channel pull plate 3 is connected to the upper side of the flow channel plate 2, and the flow channel pull plate 3 and the flow channel plate 2 form an upper flow channel 4, and the flat plate 1 is connected to the lower side of the flow channel plate 2, and the flat plate 1 and the flow channel plate 2 form a lower flow channel 5.

[0038] Through the above technical solution, when the liquid cooling plate is used, in one way, the flow channel pull plate 3 is connected to the upper side of the flow channel plate 2 to form an upper flow channel 4, and the flat plate 1 and the flow channel plate 2 form a lower flow channel 5. At this time, the flow channel pull plate 3 can serve as the bottom pull plate structure of the upper battery 7 and at the same time as a structure surrounding the upper flow channel 4. In this way, the upper battery 7 can exchange heat with the liquid cooling plate only through a layer of thermal conductive glue; similarly, the flat plate 1 serves as a structure surrounding the lower flow channel 5, so that the lower battery 8 can also exchange heat with the liquid cooling plate only through a layer of thermal conductive glue; in another way, the flat plate 1 and the flow channel plate 2 still form the lower flow channel 5, and the flow channel 5 is not formed. The channel pull plate 3 is directly attached to the upper side of the flow channel plate 2. That is, no thermal conductive glue or other connecting structure is provided between the flow channel pull plate 3 and the flow channel plate 2. The flow channel pull plate 3 and the flow channel plate 2 are directly fixed by welding or other methods. At this time, the upper battery 7 also exchanges heat with the liquid cooling plate through only a layer of thermal conductive glue. Therefore, this arrangement can make the heat transfer resistance of the upper battery 7 and the lower battery 8 consistent. When the battery pack is charged and discharged, the temperature of the upper battery 7 can be prevented from being higher than that of the lower battery 8. Even if the temperature of the upper battery 7 and the lower battery 8 is consistent, problems such as increased charging time, limited discharge power, and insufficient performance of the lower battery 8 can be avoided. In addition, compared with the embodiment of providing liquid cooling plates for the upper battery 7 and the lower battery 8 separately, the configuration of a single liquid cooling plate disclosed in the present invention can simultaneously achieve heat exchange with the upper battery 7 and the lower battery 8. Therefore, it can reduce the volume occupied by the liquid cooling plate in the battery pack, improve the volume utilization of the battery pack, and further increase the capacity of the battery.

[0039] In the present disclosure, referring to Figures 2 and 4, the flow channel pull plate 3 and the flow channel plate 2 form an upper flow channel 4, and a connecting hole 25 can be provided on the flow channel plate 2. The connecting hole 25 connects the upper flow channel 4 and the lower flow channel 5. The upper flow channel 4 and the lower flow channel 5 are connected by the setting of the connecting hole 25, thereby forming a circulation loop between the upper flow channel 4 and the lower flow channel 5. On the one hand, when in use, the upper flow channel 4 and the lower flow channel 5 can share a medium input and output port. In this way, compared with setting an additional connecting hose to connect the upper flow channel 4 and the lower flow channel 5, setting a connecting hole 25 in the flow channel plate 2 can reduce space occupancy and increase the volume utilization of the battery pack. On the other hand, it can also keep the temperature of the cooling medium in the upper flow channel 4 and the lower flow channel 5 consistent, thereby keeping the temperature between the upper battery 7 and the lower battery 8 consistent during heat dissipation. Among them, as shown in reference Figure 4, the number of connecting holes 25 can be multiple, and the multiple connecting holes 25 can include at least one first connecting hole 251 and at least one second connecting hole 252. The first connecting hole 251 is for the medium in the lower-layer flow channel 5 to flow into the upper-layer flow channel 4, and the second connecting hole 252 is for the medium in the upper-layer flow channel 4 to flow into the lower-layer flow channel 5. By setting multiple connecting holes 25, the efficiency of the cooling medium circulation between the upper-layer flow channel 4 and the lower-layer flow channel 5 can be accelerated, thereby improving the heat dissipation effect. The specific number and setting position of the connecting holes 25 can be selected from any suitable design according to actual needs, and the present disclosure does not make specific restrictions on this.

[0040] In the specific embodiment provided in the present disclosure, the upper flow channel 4 can be designed in any appropriate manner according to actual needs. In one embodiment, with reference to Figures 2 and 3, a first convex hump 31 and a first concave hump 32 are provided on the flow channel pull plate 3, a first mating plane 21 is formed on the upper side of the flow channel plate 2, the first concave hump 32 is welded to the first mating plane 21, and the first convex hump 31 and the first mating plane 21 form an upper flow channel 4; in another embodiment of the present disclosure, with reference to Figures 7 and 8, the flow channel pull plate 3 has a second mating plane 33, a second convex hump 22 and a second concave hump 23 are provided on the flow channel plate 2, the second mating plane 33 and the second convex hump 22 are welded, and the second mating plane 33 and the second concave hump 23 form an upper flow channel 4; in another embodiment of the present disclosure, with reference to Figure 10, a first convex hump 31 and a first concave hump 32 are provided on the flow channel pull plate 3, a second convex hump 22 and a second concave hump 23 are provided on the flow channel plate 2, the first concave hump 32 and the second convex hump 22 are welded, and the first convex hump 31 and the second concave hump 23 form an upper flow channel 4.

[0041] In the above three structures, the upper flow channel 4 is formed respectively through three different implementation methods. In the three different implementation methods, the upper flow channel 4 is formed between the flow channel pull plate 3 and the flow channel plate 2. Then, the upper battery 7 and the flow channel pull plate 3 are connected by a layer of thermal conductive glue, thereby reducing the number of thermal conductive glue layers between the upper battery 7 and the liquid cooling plate, and improving the heat dissipation effect of the liquid cooling plate on the upper battery 7.

[0042] In one embodiment of the present disclosure, with reference to Figures 2 to 5, a third mating plane 24 is formed on the lower side of the flow channel plate 2, and a third convex bulge 11 and a third concave bulge 12 are provided on the flat plate 1, the third mating plane 24 is welded to the third convex bulge 11, and the third mating plane 24 and the third concave bulge 12 form a lower-layer flow channel 5; in another embodiment of the present disclosure, with reference to Figures 7 to 9, a second convex bulge 22 and a second concave bulge 23 are provided on the flow channel plate 2, the flat plate 1 has a fourth mating plane 13, the second concave bulge 23 is welded to the fourth mating plane 13, and the second convex bulge 22 and the fourth mating plane 13 form a lower-layer flow channel 5; in another embodiment of the present disclosure, with reference to Figure 10, a third convex bulge 11 and a third concave bulge 12 are provided on the flat plate 1, and a second convex bulge 22 and a second concave bulge 23 are provided on the flow channel plate 2, the third convex bulge 11 and the second concave bulge 23 are welded, and the third concave bulge 12 and the second convex bulge 22 form a lower-layer flow channel 5.

[0043] In the above three structures, the lower flow channel 5 is formed respectively through three different implementation methods. The lower flow channel 5 is formed between the flat plate 1 and the flow channel plate 2. Then the lower battery 8 is connected to the flat plate 1 through thermal conductive glue for heat dissipation. At this time, a layer of thermal conductive glue is separated between the lower battery 8 and the liquid cooling plate, so as to be consistent with the upper battery 7, ensuring that the heat dissipation thermal resistance of the upper battery 7 and the lower battery 8 are consistent.

[0044] 3 and 4 , in an exemplary embodiment, the upper flow channel 4 is formed between the first convex hump 31 and the first mating plane 21, and the lower flow channel 5 is formed between the third mating plane 24 and the third concave hump 12. The portion of the flow channel plate 2 located between the first convex hump 31 and the third concave hump 12 can be provided with a connecting hole 25, thereby directly connecting the upper flow channel 4 with the lower flow channel 5, thereby realizing the circulation of cooling medium between the upper flow channel 4 and the lower flow channel 5.

[0045] In the present disclosure, referring to Figures 8 and 9, in an exemplary embodiment, the upper flow channel 4 is formed between the second concave bulge 23 and the flow channel pull plate 3, and the lower flow channel 5 is formed between the second convex bulge 22 and the flat plate 1. The adjacent second convex bulge 22 and the second concave bulge 23 can be connected by vertical ribs 26. The vertical ribs 26 can be provided with connecting holes 25, thereby directly connecting the upper flow channel 4 with the lower flow channel 5, thereby realizing the circulation of cooling medium between the upper flow channel 4 and the lower flow channel 5.

[0046] In the present disclosure, referring to Figures 2 and 7, the liquid cooling plate may further include a joint 6, which is connected to the lower-layer flow channel 5. The joint 6 may be provided with an inlet end and an outlet end, the inlet end being used for inputting the cooling medium, and the outlet end being used for outputting the cooling medium. Since the lower-layer flow channel 5 and the upper-layer flow channel 4 are connected through a connecting hole 25, the cooling medium can be input into the upper-layer flow channel 4 and the lower-layer flow channel 5 by simply connecting the joint 6 to the lower-layer flow channel 5.

[0047] Based on the above technical solution, and with reference to Figures 11 and 12 , the present disclosure further provides a battery pack comprising upper cells 7, lower cells 8, and the aforementioned liquid cooling plate. The liquid cooling plate is disposed between the upper cells 7 and the lower cells 8, with the projection of the upper cells 7 on the flat plate 1 partially covering the projection of the lower cells 8 on the flat plate 1. The upper cells 7 are connected to the runner pull plate 3 via thermally conductive adhesive, and the lower cells 8 are also connected to the flat plate 1 via thermally conductive adhesive. The battery pack provided by the present disclosure also has the aforementioned features, and to avoid repetition, they will not be described here.

[0048] In the specific embodiments provided herein, the upper battery 7 can be designed in any suitable manner according to actual needs. In one embodiment, as shown in Figures 11 and 12, the upper battery 7 can include an upper cell 71, an upper pull plate 72, and two end plates 73. In specific use, the upper battery 7 can include multiple upper cells 71, which are stacked together. The upper battery cell 71 is arranged on the flow channel pull plate 3, and the two end plates 73 are arranged on both longitudinal sides of the upper battery cell 71, wherein the end plate 73 is fixedly connected to the flow channel pull plate 3, and the upper pull plate 72 is buckled above the upper battery cell 71, and the upper pull plate 72 is fixedly connected to the end plate 73. When in use, the upper pull plate 72, the flow channel pull plate 3 and the end plates 73 at both ends are together surrounded by the outer side of the upper battery cell 71 to protect the upper battery cell 71, wherein the upper pull plate 72 and the end plate 73 can be connected in a variety of ways, such as riveting; the end plate 73 and the flow channel pull plate 3 can be connected in a variety of ways, such as riveting; the specific connection method can select any suitable design according to actual conditions, and the present disclosure does not make specific restrictions on this.

[0049] When the upper battery 7 is heavy, in order to improve the support strength for the upper battery 7, in some embodiments of the present disclosure, as shown in Figures 11 and 12, the battery pack may include a tray 9, with end beams 74 provided on both lateral sides of the tray 9, and the lateral ends of the end plates 73 are also fixedly connected to the corresponding end beams 74. The tray 9 is arranged below the lower battery 8 to provide overall support and protection. At the same time, the end beams 74 are fixedly connected to the tray 9, and then the end beams 74 are perpendicular to the end plates 73 and fixedly connected to the end plates 73 to support the upper battery 7. The connection between the end plates 73 and the end beams 74 and between the end beams 74 and the tray 9 can be connected in any suitable manner, such as bolt connection, and the present disclosure does not impose specific limitations on this. In addition, as shown in Figure 1, the battery pack may also include an upper cover 91. The tray 9 is connected to the upper cover 91 and encloses a storage space. The upper battery 7, the lower battery 8 and the liquid cooling plate are arranged in the storage space. The tray 9 and the upper cover 91 together constitute the protective structure of the battery pack. In some embodiments, a protective plate 93 may be further provided at the bottom of the upper cover 91 . The protective plate 93 is connected to the bottom of the tray 9 , and the protective plate 93 protects the bottom surface of the battery pack.

[0050] Based on the above technical solution, the present disclosure further provides an electrical device comprising the above-mentioned battery pack. In practice, the electrical device can be a variety of devices, such as new energy vehicles. This disclosure does not impose any specific limitations on this. The electrical device provided in this disclosure also has the above-mentioned features, and to avoid repetition, they are not further described here.

[0051] 1 to 12 , the specific implementation principle of the embodiment of the present disclosure is as follows: when the battery pack is in use, an upper battery 7 and a lower battery 8 are arranged in the battery pack, and a liquid cooling plate is arranged between the upper battery 7 and the lower battery 8, wherein, in the liquid cooling plate, a lower flow channel 5 is formed between the flat plate 1 and the flow channel plate 2, and an upper flow channel 4 is formed between the flow channel plate 2 and the flow channel pull plate 3. At this time, the flow channel pull plate 3 serves as both the bottom pull plate structure of the upper battery 7 and the component structure of the upper flow channel 4, or the flow channel pull plate 3 is directly attached to the flow channel plate 2, and no thermal conductive glue or other structures are provided between the two, so that only a layer of thermal conductive glue is provided between the upper battery 7 and the liquid cooling plate for connection and heat conduction; at the same time, only a layer of thermal conductive glue is provided between the lower battery 8 and the liquid cooling plate for connection and heat conduction, thereby ensuring that the heat dissipation thermal resistance of the upper battery 7 and the lower battery 8 is consistent, avoiding the problem that the upper battery 7 is hotter than the lower battery 8 during discharge, and solving the problems of limited discharge power and increased charging time during charging. At the same time, compared to installing separate liquid cooling plates for the upper and lower cells 7, 8, the single liquid cooling plate reduces the space occupied by the liquid cooling plate in the battery pack, thereby improving the volume utilization of the batteries. During this process, the upper flow channel 4 and the lower flow channel 5 are connected through the connecting hole 25, allowing the cooling medium in the upper and lower flow channels 4 and 5 to circulate between them, further ensuring consistent heat dissipation efficiency between the upper and lower cells 7, 8.

[0052] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings. However, the present disclosure is not limited to the specific details of the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all fall within the scope of protection of the present disclosure.

[0053] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0054] In addition, the various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A liquid cooling plate, characterized in that: include: Flat plate (1); flow channel plate (2); and A flow channel pull plate (3), wherein the flow channel plate (2) is arranged between the flat plate (1) and the flow channel pull plate (3), wherein; The flow channel pull plate (3) is fixed to the upper side of the flow channel plate (2) in a close-fitting manner, or the flow channel pull plate (3) is connected to the upper side of the flow channel plate (2), and the flow channel pull plate (3) and the flow channel plate (2) enclose an upper flow channel (4); The flat plate (1) is connected to the lower side of the flow channel plate (2), and the flat plate (1) and the flow channel plate (2) form a lower layer flow channel (5).

2. The liquid cooling plate according to claim 1, wherein: The flow channel pull plate (3) and the flow channel plate (2) enclose an upper flow channel (4); a connecting hole (25) is provided on the flow channel plate (2); and the connecting hole (25) connects the upper flow channel (4) and the lower flow channel (5).

3. The liquid cooling plate according to claim 2, wherein: There are multiple communicating holes (25), and the multiple communicating holes (25) include at least one first communicating hole (251) and at least one second communicating hole (252). The first communicating hole (251) allows the medium in the lower-layer flow channel (5) to flow into the upper-layer flow channel (4), and the second communicating hole (252) allows the medium in the upper-layer flow channel (4) to flow into the lower-layer flow channel (5).

4. The liquid cooling plate according to any one of claims 1 to 3, characterized in that: The flow channel pull plate (3) is provided with a first convex bulge (31) and a first concave bulge (32), the upper side of the flow channel plate (2) is formed with a first matching plane (21), the first concave bulge (32) is welded to the first matching plane (21), and the first convex bulge (31) and the first matching plane (21) enclose the upper flow channel (4), or; The flow channel pull plate (3) has a second mating plane (33), a second convex bulge (22) and a second concave bulge (23) are provided on the flow channel plate (2), the second mating plane (33) and the second convex bulge (22) are welded, and the second mating plane (33) and the second concave bulge (23) enclose the upper flow channel (4), or; The flow channel pull plate (3) is provided with a first convex bulge (31) and a first concave bulge (32), and the flow channel plate (2) is provided with a second convex bulge (22) and a second concave bulge (23). The first concave bulge (32) and the second convex bulge (22) are welded, and the first convex bulge (31) and the second concave bulge (23) surround the upper flow channel (4).

5. The liquid cooling plate according to any one of claims 1 to 3, characterized in that: A third mating plane (24) is formed on the lower side of the flow channel plate (2), a third convex bump (11) and a third concave bump (12) are provided on the flat plate (1), the third mating plane (24) is welded to the third convex bump (11), and the third mating plane (24) and the third concave bump (12) enclose the lower layer flow channel (5), or; The flow channel plate (2) is provided with a second convex bulge (22) and a second concave bulge (23), the flat plate (1) has a fourth matching plane (13), the second concave bulge (23) is welded to the fourth matching plane (13), and the second convex bulge (22) and the fourth matching plane (13) enclose the lower layer flow channel (5), or; The flat plate (1) is provided with a third convex bump (11) and a third concave bump (12); the flow channel plate (2) is provided with a second convex bump (22) and a second concave bump (23); the third convex bump (11) and the second concave bump (23) are welded; the third concave bump (12) and the second convex bump (22) enclose the lower layer flow channel (5).

6. The liquid cooling plate according to claim 2, wherein: The flow channel pull plate (3) is provided with a first convex bulge (31) and a first concave bulge (32); a first matching plane (21) is formed on the upper side of the flow channel plate (2); the first concave bulge (32) is welded to the first matching plane (21); the first convex bulge (31) and the first matching plane (21) enclose the upper flow channel (4); A third mating plane (24) is formed on the lower side of the flow channel plate (2), a third convex bump (11) and a third concave bump (12) are provided on the flat plate (1), the third mating plane (24) is welded to the third convex bump (11), and the third mating plane (24) and the third concave bump (12) enclose the lower layer flow channel (5); The communicating hole (25) is provided in a portion of the flow channel plate (2) located between the first convex bump (31) and the third concave bump (12).

7. The liquid cooling plate according to claim 2, wherein: The flow channel plate (2) is provided with a second convex hump (22) and a second concave hump (23); the second convex hump (22) and the flat plate (1) form the lower flow channel (5); the second concave hump (23) and the flow channel pull plate (3) form the upper flow channel (4); adjacent second convex hump (22) and second concave hump (23) are connected by vertical ribs (26); the vertical ribs (26) are provided with the connecting holes (25).

8. The liquid cooling plate according to any one of claims 1 to 7, characterized in that: The liquid cooling plate further comprises a joint (6), and the joint (6) is in communication with the lower layer flow channel (5).

9. A battery pack, characterized in that: include: Upper battery (7); Lower battery (8); and The liquid cooling plate according to any one of claims 1 to 8, wherein the liquid cooling plate is arranged between the upper battery (7) and the lower battery (8), and the projection of the upper battery (7) on the flat plate (1) partially covers the projection of the lower battery (8) on the flat plate (1), wherein the upper battery (7) is connected to the flow channel pull plate (3) through thermally conductive glue, and the lower battery (8) is connected to the flat plate (1) through thermally conductive glue.

10. The battery pack according to claim 9, characterized in that: The upper battery (7) comprises an upper cell (71), an upper pull plate (72) and two end plates (73), wherein the upper cell (71) is arranged on the flow channel pull plate (3), and the two end plates (73) are arranged on both sides of the longitudinal direction of the upper cell (71), wherein the end plate (73) is fixedly connected to the flow channel pull plate (3), the upper pull plate (72) is buckled above the upper cell (71), and the upper pull plate (72) is fixedly connected to the end plates (73).

11. The battery pack according to claim 10, characterized in that: The battery pack comprises a tray (9), and end beams (74) are respectively provided on both lateral sides of the tray (9), and both lateral ends of the end plate (73) are also fixedly connected to the corresponding end beams (74).

12. The battery pack according to claim 11, wherein: The battery pack includes an upper cover (91), the tray (9) is connected to the upper cover (91) and encloses a receiving space, and the upper battery (7), the lower battery (8) and the liquid cooling plate are arranged in the receiving space.

13. An electrical device, characterized in that: Comprising a battery pack according to any one of claims 9 to 12.

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