Liquid cooling plate, battery pack and electric equipment

Abstract

The utility model relates to a liquid cooling plate, a battery pack and electric equipment, the liquid cooling plate comprises a flat plate, a flow channel plate and a flow channel pulling plate, the flow channel plate is arranged between the flat plate and the flow channel pulling plate, the flow channel pulling plate is fixed on the upper side of the flow channel plate in an attached manner, or the flow channel pulling plate is connected to the upper side of the flow channel plate, and the flow channel pulling plate is connected with the flat plate. An upper-layer runner is defined by the runner pulling plate and the runner plate; the flat plate is connected to the lower side of the runner plate, and a lower-layer runner is defined by the flat plate and the runner plate. The liquid cooling plate is suitable for a battery pack comprising double layers of batteries, and can solve the technical problem that the temperature of an upper-layer battery is higher than that of a lower-layer battery.

Description

Technical Field

[0001] 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

[0002] When using power batteries for new energy vehicles, double or multiple layers of batteries are usually stacked in order to increase battery capacity and extend battery life. However, stacking double or multiple layers of batteries will increase the difficulty of heat dissipation in the battery pack.

[0003] In the related technology, taking a double-layer battery pack as an example, one solution is to set a cold plate between the two layers of batteries, 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 means that two layers of thermal conductive glue are set between the upper battery and the cold plate, resulting in a greater thermal resistance of the upper battery than that of 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. Utility Model Content

[0004] The purpose of the present disclosure is to provide a liquid cooling plate, a battery pack and an electric device. 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.

[0005] 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 fittedly 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.

[0006] Optionally, the flow channel pull plate and the flow channel plate form an upper flow channel, and the flow channel plate is provided with a connecting hole, and the connecting hole connects the upper flow channel and the lower flow channel.

[0007] 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 upper-layer flow channel.

[0008] Optionally, a first convex hump and a first concave hump 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 hump is welded to the first mating plane, and the first convex hump and the first mating plane form the upper flow channel, or, the flow channel pull plate has a second mating plane, a second convex hump and a second concave hump are provided on the flow channel plate, the second mating plane is welded to the second convex hump, and the second mating plane and the second concave hump form the upper flow channel, or, a first convex hump and a first concave hump are provided on the flow channel pull plate, a second convex hump and a second concave hump are provided on the flow channel plate, the first concave hump and the second convex hump are welded, and the first convex hump and the second concave hump form the upper flow channel.

[0009] Optionally, a third mating plane is formed on the lower side of the flow channel plate, a third convex hump and a third concave hump are arranged on the flat plate, the third mating plane is welded to the third convex hump, and the third mating plane and the third concave hump are surrounded by the lower flow channel; or, a second convex hump and a second concave hump are arranged on the flow channel plate, the flat plate has a fourth mating plane, the second concave hump is welded to the fourth mating plane, and the second convex hump and the fourth mating plane are surrounded by the lower flow channel; or, a third convex hump and a third concave hump are arranged on the flat plate, a second convex hump and a third concave hump are arranged on the flow channel plate, the third convex hump and the second concave hump are welded, and the third concave hump and the second convex hump are surrounded by the lower flow channel.

[0010] Optionally, a first convex bulge and a first concave bulge are provided on the flow channel pull plate, a first matching plane is formed on the upper side of the flow channel plate, the first concave bulge is welded to the first matching plane, and the first convex bulge and the first matching plane enclose the upper flow channel;

[0011] A third matching plane is formed on the lower side of the flow channel plate, a third convex hull and a third concave hull are arranged on the flat plate, the third matching plane is welded to the third convex hull, and the third matching plane and the third concave hull are surrounded to form the lower layer flow channel;

[0012] The communicating hole is formed in a portion of the flow channel plate between the first convex bump and the third concave bump.

[0013] 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 adjacent second convex hump and second concave hump are connected by vertical ribs, and the connecting hole is opened on the vertical ribs.

[0014] Optionally, the liquid cooling plate further comprises a joint, and the joint is communicated with the lower layer flow channel.

[0015] 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 thermal conductive glue, and the lower battery is connected to the flat plate via thermal conductive glue.

[0016] Optionally, the upper battery includes an upper battery cell, an upper pull plate and two end plates, the upper battery cell is arranged on the flow channel pull plate, and the two end plates are arranged on both longitudinal sides of the upper battery cell, wherein the end plate is fixedly connected to the flow channel pull plate, the upper pull plate is buckled above the upper battery cell, and the upper pull plate is fixedly connected to the end plates.

[0017] 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.

[0018] 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.

[0019] According to a third aspect of the present disclosure, there is provided an electric device, the electric device comprising the above-mentioned battery pack.

[0020] 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 a bottom pull plate structure of the upper battery and a structure for forming 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 for forming 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 only through a layer of thermal conductive glue. Therefore, such a setting can make the heat transfer thermal 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 when the battery pack is charged and discharged. Even if the temperature of the upper battery and the lower battery is consistent, it can avoid the increase in charging time, the limitation of discharge power, and the inability to fully exert the performance of the lower battery. In addition, compared with the implementation of providing liquid cooling plates for the upper battery and the lower battery respectively, 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 of the battery pack, and further improving the capacity of the battery.

[0021] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings:

[0023] Figure 1 is a schematic diagram of the structure of a battery pack provided by an embodiment of the present disclosure;

[0024] Figure 2 is a schematic structural diagram of a liquid cooling plate provided by an embodiment of the present disclosure;

[0025] Figure 3 is a cross-sectional schematic diagram of a liquid cooling plate provided by an embodiment of the present disclosure;

[0026] Figure 4 is a schematic structural diagram of a flow channel plate in a liquid cooling plate provided by an embodiment of the present disclosure;

[0027] Figure 5 is a schematic structural diagram of a flat plate in a liquid cooling plate provided by an embodiment of the present disclosure;

[0028] Figure 6 It is a schematic structural diagram of a flow channel pull plate in a liquid cooling plate provided by an embodiment of the present disclosure;

[0029] Figure 7 is a structural schematic diagram of a liquid cooling plate provided by another embodiment of the present disclosure;

[0030] Figure 8 is a cross-sectional schematic diagram of a liquid cooling plate provided by another embodiment of the present disclosure;

[0031] Fig. 9 is a schematic structural diagram of a flow channel plate in a liquid cooling plate provided in another embodiment of the present disclosure;

[0032] Fig.10 is a cross-sectional schematic diagram of a liquid cooling plate provided by another embodiment of the present disclosure;

[0033] Fig.11 is a schematic diagram of the structure of an upper battery and a lower battery in a battery pack provided by an embodiment of the present disclosure;

[0034] Fig.12 It is a schematic diagram of the structure of the upper battery in the battery pack provided in an embodiment of the present disclosure.

[0035] Description of Reference Numerals

[0036] 1. Flat plate; 11. Third convex bump; 12. Third concave bump; 13. Fourth matching plane; 2. Flow channel plate; 21. First matching plane; 22. Second convex bump; 23. Second concave bump; 24. Third matching plane; 25. Connecting hole; 251. First connecting hole; 252. Second connecting hole; 3. Flow channel pull plate; 31. First convex bump; 32. First concave bump; 33. Second matching plane; 4. Upper flow channel; 5. Lower flow channel; 6. Connector; 7. Upper battery; 71. Upper cell; 72. Upper pull plate; 73. End plate; 74. End beam; 8. Lower battery; 9. Tray; 91. Upper cover; 93. Guard plate. DETAILED DESCRIPTION

[0037] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0038] In the present disclosure, unless otherwise stated, directional words such as "horizontal, vertical, up and down direction" are used based on Figure 1The XYZ coordinate system is defined in , specifically, the X direction refers to the horizontal direction, the Y direction refers to the vertical direction, the Z direction refers to the up and down direction, and the side indicated by the arrow is the up side, and the opposite is the down side. In addition, the up and down directions also correspond to the gravity direction 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 and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers 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 construed as limitations on the present disclosure.

[0039] In an exemplary embodiment of the present disclosure, a liquid cooling plate is provided, referring to Figures 1 to 10 As shown, 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 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.

[0040] 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 be used as a bottom pull plate structure for the upper battery 7, and at the same time as a structure for 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 is used as a structure for 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 and fixed on the upper side of the flow channel plate 2, that is, no heat conductive glue or other connecting structure is set between the flow channel pull plate 3 and the flow channel plate 2, and 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 only through a layer of heat conductive glue. Therefore, such a setting can make the heat transfer thermal resistance of the upper battery 7 and the lower battery 8 consistent, and can avoid the temperature of the upper battery 7 being higher than the lower battery 8 when the battery pack is charged and discharged. Even if the temperature of the upper battery 7 and the lower battery 8 is consistent, it can avoid the occurrence of problems such as increased charging time, limited discharge power, and the performance of the lower battery 8 cannot be fully utilized. In addition, compared with the implementation of setting liquid cooling plates for the upper battery 7 and the lower battery 8 respectively, the setting 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, thereby reducing the volume occupied by the liquid cooling plate on the battery pack, improving the volume utilization of the battery pack, and further improving the capacity of the battery.

[0041] In this disclosure, reference is made to Figure 2 and Figure 4 As shown, the flow channel pull plate 3 and the flow channel plate 2 form an upper flow channel 4, and the flow channel plate 2 may be provided with a connecting hole 25, which 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, so as to form 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 port 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, the connecting hole 25 is provided in the flow channel plate 2 to reduce space occupancy and increase the volume utilization rate of the battery pack. On the other hand, it can also make the temperature of the cooling medium in the upper flow channel 4 and the lower flow channel 5 consistent, thereby making the temperature between the upper battery 7 and the lower battery 8 consistent during heat dissipation. Among them, reference Figure 4 As shown in the figure, the number of the 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 upper-layer flow channel 4. By setting a plurality of connecting holes 25, the circulation efficiency of the cooling medium 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 according to any suitable design according to actual needs, and the present disclosure does not make any specific restrictions on this.

[0042] In the specific embodiments provided in the present disclosure, the upper flow channel 4 can be designed in any suitable manner according to actual needs. Figure 2 and Figure 3 As shown in , 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 form an upper flow channel 4; in another embodiment of the present disclosure, refer to Figure 7 and Figure 8 As shown in , the flow channel pull plate 3 has a second matching plane 33, the flow channel plate 2 is provided with a second convex bulge 22 and a second concave bulge 23, the second matching plane 33 is welded to the second convex bulge 22, and the second matching plane 33 and the second concave bulge 23 form an upper flow channel 4; in another embodiment of the present disclosure, refer to Fig.10 As shown in the figure, a first convex bump 31 and a first concave bump 32 are provided on the flow channel pull plate 3, a second convex bump 22 and a second concave bump 23 are provided on the flow channel plate 2, the first concave bump 32 and the second convex bump 22 are welded, and the first convex bump 31 and the second concave bump 23 surround the upper flow channel 4.

[0043] In the above three structures, the upper flow channel 4 is formed respectively through three different implementations. In the three different implementations, 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 adhesive, thereby reducing the number of thermal conductive adhesive 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.

[0044] In one embodiment of the present disclosure, reference Figures 2 to 5 As shown in , a third matching plane 24 is formed on the lower side of the flow channel plate 2, a third convex bulge 11 and a third concave bulge 12 are provided on the flat plate 1, the third matching plane 24 is welded to the third convex bulge 11, and the third matching plane 24 and the third concave bulge 12 form a lower flow channel 5; in another embodiment of the present disclosure, reference Figures 7 to 9 As shown in , 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 form a lower flow channel 5; in another embodiment of the present disclosure, refer to Fig.10 As shown in the figure, 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 is welded to the second concave bump 23, and the third concave bump 12 and the second convex bump 22 form a lower layer flow channel 5.

[0045] 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.

[0046] Among them, reference Figure 3 and Figure 4 As shown in the figure, when the upper layer flow channel 4 is formed between the first convex hump 31 and the first matching plane 21 and the lower layer flow channel 5 is formed between the third matching 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 layer flow channel 4 with the lower layer flow channel 5, thereby realizing the circulation of cooling medium between the upper layer flow channel 4 and the lower layer flow channel 5.

[0047] In this disclosure, reference is made to Figure 8 and Fig. 9As shown in the figure, when the upper layer flow channel 4 is formed between the second concave bump 23 and the flow channel pull plate 3 and the lower layer flow channel 5 is formed between the second convex bump 22 and the flat plate 1, the adjacent second convex bump 22 and the second concave bump 23 can be connected by vertical ribs, and the vertical ribs can be provided with connecting holes 25, so as to directly connect the upper layer flow channel 4 with the lower layer flow channel 5, so as to realize the circulation of cooling medium between the upper layer flow channel 4 and the lower layer flow channel 5.

[0048] In this disclosure, reference is made to Figure 2 and Figure 7 As shown in the figure, 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 for inputting and outputting the cooling medium. Since the lower-layer flow channel 5 is connected to the upper-layer flow channel 4 through the 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.

[0049] Based on the above technical solution, Fig.11 and Fig.12 As shown in , the present disclosure further provides a battery pack, which includes an upper battery 7, a lower battery 8 and the above-mentioned liquid cooling plate, the liquid cooling plate is arranged between the upper battery 7 and the lower battery 8, 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 by thermal conductive glue, and the lower battery 8 is connected to the flat plate 1 by thermal conductive glue. The battery pack provided by the present disclosure also has the above-mentioned characteristics, and in order to avoid repetition, it will not be repeated here.

[0050] In the specific embodiments provided in the present disclosure, the upper battery 7 can be designed in any suitable manner according to actual needs. Fig.11 and Fig.12 As shown, the upper battery 7 may include an upper battery cell 71, an upper pull plate 72 and two end plates 73. In specific use, the upper battery cell 7 may include multiple upper battery cells 71, which are stacked and arranged, and the upper battery 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 battery 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 battery cell 71, and the upper pull plate 72 is fixedly connected to the end plates 73. When in use, the upper pull plate 72, the flow channel pull plate 3 and the end plates 73 at both ends are jointly 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 as well as the end plate 73 and the flow channel pull plate 3 can be connected by a variety of connection methods including 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.

[0051] When the upper battery 7 is heavy, in order to improve the support strength of the upper battery 7, in some embodiments of the present disclosure, reference is made to Fig.11 and Fig.12 As shown in , the battery pack may include a tray 9, and the tray 9 is provided with end beams 74 on both lateral sides, and the lateral ends of the end plate 73 are also fixedly connected to the corresponding end beams 74, respectively. The tray 9 is arranged below the lower battery 8 to realize overall support and protection, and the end beam 74 is fixedly connected to the tray 9, and then the end beam 74 is perpendicular to the end plate 73 and fixedly connected to the end plate 73 to support the upper battery 7, wherein the end plate 73 and the end beam 74 and the end beam 74 and the tray 9 can be connected in any suitable manner, such as bolt connection, and the present disclosure does not impose specific restrictions on this. In addition, the battery pack may also include an upper cover 91, and the tray 9 is connected to the upper cover 91 and surrounded by a storage space 92, and the upper battery 7, the lower battery 8 and the liquid cooling plate are arranged in the storage space 92, and the tray 9 and the upper cover 91 together constitute a protective structure of the battery pack. In some embodiments, a protective plate 93 may also be provided at the bottom of the upper cover 91, and the protective plate 93 is connected to the bottom of the tray 9 to protect the bottom surface of the battery pack.

[0052] On the basis of the above technical solution, the present disclosure further provides an electric device, which includes the above battery pack. When used specifically, the electric device can be a variety of devices including new energy vehicles, and the present disclosure does not impose specific restrictions on this. The electric device provided by the present disclosure also has the above characteristics, and to avoid repetition, it will not be repeated here.

[0053] refer to Figure 1 Zhihe Fig.12As shown, the specific implementation principle of the embodiment of the present disclosure is: 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 a lower flow channel 5 is formed between the flat plate 1 and the flow channel plate 2 in the liquid cooling plate, 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 and fixed to the flow channel plate 2, and no structure such as thermal conductive glue is arranged between the two, so that only one layer of thermal conductive glue is arranged between the upper battery 7 and the liquid cooling plate for connection and heat conduction; at the same time, only one layer of thermal conductive glue is arranged 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 is consistent with that of the lower battery 8, avoiding the problem that the temperature of the upper battery 7 is higher than that of the lower battery 8 during discharge, and solving the problems of limited discharge power and increased charging time. At the same time, compared with the method of separately setting liquid cooling plates for the upper battery 7 and the lower battery 8, the setting of a single liquid cooling plate reduces the space occupied by the liquid cooling plate in the battery pack and improves the volume utilization rate of the battery. In this process, the upper flow channel 4 and the lower flow channel 5 are connected through the connecting hole 25, so that the cooling medium in the upper flow channel 4 and the lower flow channel 5 can flow mutually, further ensuring that the heat dissipation efficiency between the upper battery 7 and the lower battery 8 is consistent.

[0054] 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 in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0055] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0056] In addition, 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: It includes 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 fittedly 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.

2. The liquid cooling plate according to claim 1, characterized in that: The flow channel pull plate and the flow channel plate form an upper flow channel, and the flow channel plate is provided with a connecting hole, and the connecting hole connects the upper flow channel and the lower flow channel.

3. The liquid cooling plate according to claim 2, characterized in that: The number of the connecting holes is multiple, and the multiple connecting holes include 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.

4. The liquid cooling plate according to any one of claims 1 to 3, characterized in that: A first convex bulge and a first concave bulge are arranged on the flow channel pull plate, and a first matching plane is formed on the upper side of the flow channel plate, the first concave bulge is welded to the first matching plane, and the first convex bulge and the first matching plane form an upper flow channel, or the flow channel pull plate has a second matching plane, a second convex bulge and a second concave bulge are arranged on the flow channel plate, the second matching plane is welded to the second convex bulge, and the second matching plane and the second concave bulge form an upper flow channel, or the flow channel pull plate has a first convex bulge and a first concave bulge, a second convex bulge and a second concave bulge are arranged 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 an upper flow channel.

5. The liquid cooling plate according to any one of claims 1 to 3, characterized in that: A third matching plane is formed on the lower side of the flow channel plate, a third convex hump and a third concave hump are arranged on the flat plate, the third matching plane is welded to the third convex hump, and the third matching plane and the third concave hump are surrounded by the lower flow channel, or a second convex hump and a second concave hump are arranged on the flow channel plate, the flat plate has a fourth matching plane, the second concave hump is welded to the fourth matching plane, and the second convex hump and the fourth matching plane are surrounded by the lower flow channel, or a third convex hump and a third concave hump are arranged on the flat plate, a second convex hump and a second concave hump are arranged on the flow channel plate, the third convex hump and the second concave hump are welded, and the third concave hump and the second convex hump are surrounded by the lower flow channel.

6. The liquid cooling plate according to claim 2, characterized in that: The flow channel pull plate is provided with a first convex bulge and a first concave bulge, a first matching plane is formed on the upper side of the flow channel plate, the first concave bulge is welded to the first matching plane, and the first convex bulge and the first matching plane enclose the upper flow channel; A third matching plane is formed on the lower side of the flow channel plate, a third convex hull and a third concave hull are arranged on the flat plate, the third matching plane is welded to the third convex hull, and the third matching plane and the third concave hull are surrounded to form the lower layer flow channel; The communicating hole is formed in a portion of the flow channel plate between the first convex bump and the third concave bump.

7. The liquid cooling plate according to claim 2, characterized in that: The flow channel plate is provided with a second convex hump and a second concave hump, 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, the adjacent second convex hump and the second concave hump are connected by vertical ribs, and the connecting holes are opened on the vertical ribs.

8. The liquid cooling plate according to claim 1, characterized in that: The liquid cooling plate further comprises a joint, and the joint is communicated with the lower layer flow channel.

9. A battery pack, characterized in that: It comprises an upper battery, a lower battery 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 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 through thermal conductive glue, and the lower battery is connected to the flat plate through thermal conductive glue.

10. The battery pack according to claim 9, characterized in that: The upper battery includes an upper battery cell, an upper pull plate and two end plates, wherein the upper battery cell is arranged on the flow channel pull plate, and the two end plates are arranged on both longitudinal sides of the upper battery cell, wherein the end plate is fixedly connected to the flow channel pull plate, the upper pull plate is buckled above the upper battery cell, and the upper pull plate is fixedly connected to the end plates.

11. The battery pack according to claim 10, characterized in that: The battery pack comprises a tray, and end beams are respectively arranged on two lateral sides of the tray, and the two lateral ends of the end plate are also fixedly connected to the corresponding end beams respectively.

12. The battery pack according to claim 11, characterized in that: 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.

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

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