Liquid cooling plate and battery pack

Abstract

The embodiment of the utility model provides a liquid cooling plate and a battery pack, and relates to the technical field of batteries. The liquid cooling plate is used for cooling a battery and comprises a first cooling plate and a plurality of second cooling plates, a first cooling flow channel is arranged in the first cooling plate, and the first cooling plate is provided with a cooling surface used for being in heat conduction contact with the bottom surface of the battery; the plurality of second cold plates are arranged along the first direction and are vertically fixed on the heat dissipation surface, two adjacent second cold plates are spaced to define a placement space for accommodating the battery, the second cold plates are used for being in heat conduction contact with the side surface of the battery, the second cold plates are provided with second heat dissipation flow channels, and the second heat dissipation flow channels are communicated with the first heat dissipation flow channels. According to the liquid cooling plate provided by the invention, the circulation requirement of the cooling liquid in the liquid cooling plate can be met only by arranging one group of conveying pipes communicated with the first heat dissipation flow channels, so that the number of the conveying pipes for conveying the cooling liquid in the battery pack is effectively reduced, the layout of pipelines in the battery pack is simplified, and the space occupied by the pipelines is reduced.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a liquid cooling plate and a battery pack. Background Technology

[0002] Battery packs play an important role in the new energy field. Battery packs generate a lot of heat during long-term operation, so liquid cooling plates need to be installed inside the battery pack to prevent thermal runaway.

[0003] In the prior art, the battery pack includes a bottom liquid cooling plate, multiple side liquid cooling plates and multiple cell modules. The bottom liquid cooling plate and each side liquid cooling plate are set independently. The bottom liquid cooling plate is set at the bottom of the cell module. A side liquid cooling plate is set between each two adjacent cell modules. Each side liquid cooling plate is connected to a coolant supply device through a delivery pipe so that the coolant circulates in the side liquid cooling plate.

[0004] However, the bottom liquid cooling plate and the liquid cooling plates on each side are set independently, which results in a large number of delivery pipes inside the battery pack for transporting coolant, a messy pipe layout, and a large space occupation. Utility Model Content

[0005] This application provides a liquid cooling plate and a battery pack, which helps to simplify the pipe layout of the liquid cooling plate in the battery pack and saves the space occupied by the pipes.

[0006] On one hand, this application provides a liquid cooling plate for dissipating heat from a battery, comprising: a first cold plate having a first heat dissipation channel inside, the first cold plate having a heat dissipation surface for thermally contacting the bottom surface of the battery; a plurality of second cold plates arranged along a first direction and vertically fixed to the heat dissipation surface, adjacent two second cold plates being spaced apart to define a placement space for accommodating the battery, the second cold plates being for thermally contacting the sides of the battery, the second cold plates having a second heat dissipation channel communicating with the first heat dissipation channel.

[0007] In one possible implementation, the first heat dissipation channel includes a liquid delivery channel and a liquid return channel arranged opposite to each other along a second direction; the second cold plate has a bottom wall facing the first cold plate, and the bottom wall has a liquid inlet and a liquid outlet communicating with the second heat dissipation channel at both ends along the second direction, the liquid inlet communicating with the liquid delivery channel and the liquid outlet communicating with the liquid return channel.

[0008] In one possible implementation, the heat dissipation surface is provided with a liquid delivery port and a liquid return port that correspond one-to-one with the second cold plate. The liquid delivery port is connected to the liquid delivery channel, the liquid return port is connected to the liquid return channel, the liquid inlet is connected to the liquid delivery port, and the liquid return port is connected to the liquid outlet.

[0009] In one possible implementation, a connecting boss is formed on the heat dissipation surface, corresponding one-to-one with the liquid inlet and the liquid return outlet, and the liquid inlet and the liquid return outlet are both located on the corresponding connecting boss; the bottom wall of the second cold plate is provided with connecting feet at both ends, the connecting feet are covered on the outside of the connecting boss, and the liquid inlet and the liquid outlet are both formed on the corresponding connecting feet.

[0010] In one possible implementation, the connecting foot has a first mating surface that fits against the end face of the connecting boss; the liquid cooling plate further includes: a first sealing member, corresponding one-to-one with the connecting boss, the first sealing member being placed on the end face of the corresponding connecting boss to seal the gap between the end face of the connecting boss and the first mating surface.

[0011] In one possible implementation, the connecting foot has a second mating surface that fits against the heat dissipation surface; the liquid cooling plate further includes a second sealing member, which corresponds one-to-one with the connecting boss, and the second sealing member is sleeved on the outside of the corresponding connecting boss to seal the gap between the heat dissipation surface and the second mating surface.

[0012] In one possible implementation, the heat dissipation surface is further provided with a plurality of hole groups corresponding to the connecting boss, each hole group including a first mounting hole disposed around the corresponding connecting boss, and the connecting foot is provided with a plurality of second mounting holes corresponding to the first mounting holes, and the second cold plate and the first cold plate are connected by fasteners passing through the first mounting holes and the second mounting holes.

[0013] In one possible implementation, the second heat dissipation channel includes: a first sub-channel and a second sub-channel distributed along a third direction, wherein both ends of either the first sub-channel or the second sub-channel are connected to an inlet and an outlet.

[0014] In one possible implementation, the first cold plate includes a bottom plate and a top plate, which are welded together. The top plate forms a heat dissipation surface, and a first heat dissipation channel is formed by the bottom plate protruding in a direction away from the top plate.

[0015] On the other hand, this application also provides a battery pack, including: a housing assembly having a receiving cavity; any of the aforementioned liquid cooling plates disposed in the receiving cavity; a plurality of batteries, at least some of which are disposed in the placement space of the liquid cooling plates, the bottom surface of the batteries being in thermal contact with a first cold plate of the liquid cooling plates, and the side surface of the batteries being in thermal contact with a second cold plate of the liquid cooling plates.

[0016] The liquid cooling plate and battery pack provided in this application include a first cooling plate and multiple second cooling plates. The battery pack contains batteries. The second cooling plates are vertically disposed on the heat dissipation surface of the first cooling plate, and the multiple second cooling plates are spaced apart along a first direction, forming a mounting space between adjacent second cooling plates. The batteries of the battery pack are disposed within the mounting space, such that the bottom surface of the first cooling plate contacts the bottom surface of the battery, and the sides of the second cooling plates contact the sides of the battery. A first heat dissipation channel is provided in the first cooling plate, and a second heat dissipation channel is provided in the second cooling plate. The first heat dissipation channel and the second heat dissipation channel are connected. When the liquid cooling plate starts working, a coolant supply device delivers coolant into the first heat dissipation channel of the first cooling plate, and the coolant enters the second cooling plate through the first heat dissipation channel. The two heat dissipation channels allow the coolant to circulate within the second cold plate. After circulating within the second cold plate, the coolant returns to the first heat dissipation channel and is output back to the coolant supply device. In this way, the first heat dissipation channel not only circulates the coolant in the first cold plate but also acts as a coolant delivery pipe for the second cold plate, delivering coolant to the second heat dissipation channel. This reduces the need for additional coolant delivery pipes within the battery pack. Only an inlet pipe and an outlet pipe connected to the first heat dissipation channel are required within the battery pack. No additional delivery pipes are needed on the second cold plate, which simplifies the piping layout within the battery pack, reduces the space occupied by delivery pipes, and helps to reduce the size of the battery pack. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] Figure 1 This is a schematic diagram of the structure of the liquid cooling plate provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of the structure of the first cold plate of the liquid-cooled plate provided in the embodiments of this application;

[0020] Figure 3 for Figure 2 A structural schematic diagram of the first cold plate from another angle;

[0021] Figure 4 for Figure 1 Sectional view along line BB at point A;

[0022] Figure 5 for Figure 2 A magnified view of a section at point C;

[0023] Figure 6 for Figure 3 A magnified view of a section at point D;

[0024] Figure 7 for Figure 6 Rear view;

[0025] Figure 8 for Figure 4 A magnified view of a section at point E in the middle;

[0026] Figure 9 This is a schematic diagram of the structure of the second cold plate of the liquid-cooled plate provided in the embodiments of this application;

[0027] Figure 10 for Figure 9 A cross-sectional view of the second cold plate along the FF direction;

[0028] Figure 11 for Figure 9 A bottom view of the second cold plate.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100-Liquid Cooling Plate;

[0031] 110 - First Cold Plate;

[0032] 111-First heat dissipation channel; 1111-Liquid delivery channel; 1112-Liquid return channel;

[0033] 112-Top plate; 1121-Heat dissipation surface; 1122-Liquid inlet; 1123-Liquid return inlet; 1124-First mounting hole;

[0034] 113 - Connecting boss;

[0035] 114 - Base Plate;

[0036] 120 - Second Cold Plate;

[0037] 121 - Second heat dissipation channel; 1211 - First sub-channel; 1212 - Second sub-channel; 1213 - Branch channel; 1213a - Main channel; 1213b - First branch channel; 1213c - Second branch channel;

[0038] 122 - Liquid Inlet;

[0039] 123-liquid outlet;

[0040] 124-Connecting foot; 1241-First mating surface; 1242-Second mating surface; 1243-Second mounting hole;

[0041] 125 - Receptacle;

[0042] 130 - First seal;

[0043] 140 - Second seal.

[0044] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0045] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0046] As shown in the background art, in the prior art, the battery pack includes a bottom liquid cooling plate, multiple side liquid cooling plates and multiple cell modules. The bottom liquid cooling plate and each side liquid cooling plate are set independently. The bottom liquid cooling plate is set at the bottom of the cell module. A side liquid cooling plate is set between each two adjacent cell modules. Each side liquid cooling plate is connected to a coolant supply device through a delivery pipe so that the coolant circulates in the side liquid cooling plate.

[0047] However, the bottom liquid cooling plate and the liquid cooling plates on each side are set independently, which results in a large number of delivery pipes inside the battery pack for transporting coolant, a messy pipe layout, and a large space occupation.

[0048] To address the aforementioned technical problems, this application provides a liquid cooling plate and a battery pack. The liquid cooling plate includes a first cooling plate and multiple second cooling plates. The battery pack contains a battery. The second cooling plates are vertically disposed on the heat dissipation surface of the first cooling plate, and the multiple second cooling plates are spaced apart along a first direction, forming a mounting space between adjacent second cooling plates. The battery of the battery pack is disposed within the mounting space, such that the first cooling plate contacts the bottom surface of the battery, and the second cooling plates contact the sides of the battery. A first heat dissipation channel is provided in the first cooling plate, and a second heat dissipation channel is provided in the second cooling plate. The first heat dissipation channel and the second heat dissipation channel are connected. When the liquid cooling plate starts working, a coolant supply device delivers coolant into the first heat dissipation channel of the first cooling plate. The coolant passes through the first heat dissipation channel... The coolant flows into the second cooling channel and circulates within the second cold plate. After circulating within the second cold plate, it returns to the first cooling channel and exits through the first cooling channel back into the coolant supply device. In this way, the first cooling channel not only circulates the coolant in the first cold plate but also acts as a coolant delivery pipe for the second cold plate, delivering coolant to the second cooling channel. This reduces the need for additional coolant delivery pipes within the battery pack. Only an inlet pipe and an outlet pipe connected to the first cooling channel are required within the battery pack. No additional delivery pipes are needed on the second cold plate, which simplifies the piping layout within the battery pack, reduces the space occupied by delivery pipes, and helps to reduce the size of the battery pack.

[0049] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings:

[0050] It should be noted that the liquid cooling plate provided in this application embodiment can be applied to various different battery packs.

[0051] See Figures 1 to 5 As shown, the liquid cooling plate 100 of this application embodiment is used to dissipate heat for a battery, including: a first cooling plate 110 and a plurality of second cooling plates 120, wherein the first cooling plate 110 is provided with a first heat dissipation channel 111 inside, and the first cooling plate 110 has a heat dissipation surface 1121 for thermally conductive contact with the bottom surface of the battery; the plurality of second cooling plates 120 are arranged along a first direction and vertically fixed to the heat dissipation surface 1121, and two adjacent second cooling plates 120 are spaced apart to define a placement space for accommodating the battery, the second cooling plates 120 are used for thermally conductive contact with the side of the battery, and the second cooling plates 120 are provided with a second heat dissipation channel 121, which is connected to the first heat dissipation channel 111.

[0052] In the embodiments of this application, Figure 1The X direction is the first direction, and the Y direction is the second direction. The first cold plate 110 can be set at the bottom of the battery pack. The second cold plates 120 are spaced apart along the first direction on the heat dissipation surface 1121 of the first cold plate 110. The second cold plates 120 extend along the second direction and are set perpendicular to the heat dissipation surface 1121. An installation space is formed between two adjacent second cold plates 120. The battery of the battery pack is set in the installation space so that the bottom surface of the battery contacts the first cold plate 110, and the two opposite sides of the battery contact the two second cold plates 120 respectively. In this way, at least three sides of the battery are in contact with the liquid cooling plate 100, which is beneficial to improving the heat dissipation efficiency of the battery.

[0053] In the prior art, each of the second cold plates 120 and the first cold plate 110 is provided with a delivery pipe connected to a coolant supply device. This results in multiple sets of delivery pipes for delivering coolant within the battery pack, leading to a complex pipe arrangement and a large space occupation. However, the liquid cooling plate 100 provided in this embodiment has a first heat dissipation channel 111 in the first cold plate 110 and a second heat dissipation channel 121 in the second cold plate 120. The first heat dissipation channel 111 and the second heat dissipation channel 121 are interconnected. Thus, when coolant enters the first heat dissipation channel 111, it can dissipate the coolant through the first heat dissipation channel 111. The coolant is delivered to the second heat dissipation channel 121. That is, the first heat dissipation channel 111 can function as a coolant delivery pipe for multiple second cold plates 120 while circulating the coolant in the first cold plate 110. Therefore, the liquid cooling plate 100 in this embodiment only needs to be provided with one set of delivery pipes connected to the first heat dissipation channel 111 to complete the circulation of coolant in the first cold plate 110 and each of the second cold plates 120. This can reduce the number of delivery pipes connected to the liquid cooling plate 100 in the battery pack, which helps to simplify the arrangement of pipes in the battery pack, reduce the space occupied by the delivery pipes, and further help to reduce the volume of the battery pack.

[0054] See also some of the possible implementation methods. Figures 1 to 5 and Figure 11 As shown, the first heat dissipation channel 111 of this application embodiment includes a liquid delivery channel 1111 and a liquid return channel 1112 arranged opposite to each other along the second direction; the second cold plate 120 has a bottom wall facing the first cold plate 110, and the bottom wall is provided with an inlet 122 and an outlet 123 communicating with the second heat dissipation channel 121 at both ends along the second direction, the inlet 122 communicating with the liquid delivery channel 1111, and the outlet 123 communicating with the liquid return channel 1112.

[0055] In a specific implementation, both the liquid delivery channel 1111 and the liquid return channel 1112 extend along the first direction. The liquid inlet 122 of each second cold plate 120 is connected to the liquid delivery channel 1111, and the liquid outlet 123 of each second cold plate 120 is connected to the liquid return channel 1112. In addition, the first heat dissipation channel 111 may also include a circulation channel, which is disposed between the liquid delivery channel 1111 and the liquid return channel 1112. The circulation channel is connected to both the liquid delivery channel 1111 and the liquid return channel 1112. The arrangement of the circulation channel can be adjusted according to the layout of the batteries in the battery pack, etc. This application embodiment does not limit this.

[0056] When the liquid cooling plate 100 is operating, the coolant in the coolant supply device enters the delivery channel 1111 through the delivery pipe. Part of the coolant in the delivery channel 1111 enters the second heat dissipation channel 121 through the inlet 122 of each second cold plate 120, where it flows and exchanges heat with the side of the battery. The other part of the coolant enters the circulation channel, where it flows and exchanges heat with the bottom surface of the battery. The coolant in each second cold plate 120 then enters the return channel 1112 through the outlet 123. After completing heat exchange, the coolant in the circulation channel flows into the return channel 1112, which then transports the coolant back to the coolant supply device through the delivery pipe. Thus, the liquid cooling plate 100 completes one coolant cycle. In this way, the liquid cooling plate 100 only needs to be equipped with two delivery pipes connected to the liquid delivery channel 1111 and the liquid return channel 1112 to complete the coolant circulation of the entire liquid cooling plate 100, which effectively reduces the number of delivery pipes, simplifies the arrangement of delivery pipes, saves the space occupied by delivery pipes, and reduces the volume of the battery pack.

[0057] See also some of the possible implementation methods. Figures 1 to 5 , Figure 8 and Figure 11 As shown, the heat dissipation surface 1121 of this application embodiment is provided with a liquid delivery port 1122 and a liquid return port 1123 corresponding to the second cold plate 120. The liquid delivery port 1122 is connected to the liquid delivery channel 1111, the liquid return port 1123 is connected to the liquid return channel 1112, the liquid inlet 122 is connected to the liquid delivery port 1122, and the liquid return port 1123 is connected to the liquid outlet 123.

[0058] In some embodiments, liquid inlets 1122 are spaced apart along a first direction on liquid delivery channels 1111, and liquid return inlets 1123 are spaced apart along a first direction on liquid return channels 1112. The liquid inlet 122 and liquid outlet 123 of the second cold plate 120 are respectively connected to the corresponding liquid inlets 1122 and liquid return inlets 1123, thereby realizing the communication between the first heat dissipation channel 111 and the second heat dissipation channel 121.

[0059] See also some of the possible implementation methods. Figure 1 , Figure 2 , Figure 4 and Figures 6 to 11 As shown, in this embodiment of the application, a connecting boss 113 is formed on the heat dissipation surface 1121, which corresponds one-to-one with the liquid inlet 1122 and the liquid return outlet 1123. The liquid inlet 1122 and the liquid return outlet 1123 are both provided on the corresponding connecting boss 113. The bottom wall of the second cold plate 120 is provided with connecting feet 124 at both ends. The connecting feet 124 are covered on the outside of the connecting boss 113. The liquid inlet 122 and the liquid outlet 123 are both formed on the corresponding connecting feet 124.

[0060] Understandable Figure 1 The Z-direction is the third direction. A groove corresponding to the connecting boss 113 is opened on the connecting foot 124. The liquid inlet 122 or liquid outlet 123 is located at the bottom of the groove. The connecting boss 113 has a through hole that runs through the third direction. The through hole communicates with the liquid inlet 1122 or liquid return 1123 and corresponds to the liquid inlet 122 or liquid outlet 123. When assembling the liquid cooling plate 100, the groove of the connecting foot 124 is aligned with the connecting boss 113, so that the connecting foot 124 covers the outside of the connecting boss 113. The coolant enters the second heat dissipation channel 121 through the liquid outlet 123, the through hole and the liquid inlet 122 in sequence, and then returns to the first heat dissipation channel 111 through the liquid outlet 123, the through hole and the liquid return 1123 in sequence. Setting the connecting boss 113 to correspond with the connecting foot 124 can prevent coolant from overflowing and help ensure the sealing of the connection between the first heat dissipation channel 111 and the second heat dissipation channel 121.

[0061] See also some of the possible implementation methods. Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the connecting foot 124 in this embodiment of the application has a first mating surface 1241 that fits against the end face of the connecting boss 113; the liquid cooling plate 100 also includes a first sealing member 130, which corresponds one-to-one with the connecting boss 113. The first sealing member 130 is placed on the end face of the corresponding connecting boss 113 to seal the gap between the end face of the connecting boss 113 and the first mating surface 1241.

[0062] It is understood that the first sealing element 130 provided between the first mating surface 1241 and the end face of the connecting boss 113 can seal the gap between the end face of the connecting boss 113 and the first mating surface 1241, preventing coolant from overflowing from the connection between the connecting boss 113 and the first mating surface 1241, and ensuring that the liquid cooling plate 100 can operate continuously and stably. The first sealing element 130 can be a waterproof rubber part, silicone part, etc. The material of the first sealing element 130 is not limited in this embodiment.

[0063] See also some of the possible implementation methods. Figure 1 , Figure 2 , Figure 7 , Figure 8 , Figure 10 and Figure 11 As shown, the connecting foot 124 in this embodiment of the application has a second mating surface 1242 that fits against the heat dissipation surface 1121; the liquid cooling plate 100 also includes a second sealing member 140, which corresponds one-to-one with the connecting boss 113. The second sealing member 140 is sleeved on the outside of the corresponding connecting boss 113 to seal the gap between the heat dissipation surface 1121 and the second mating surface 1242.

[0064] Furthermore, a second sealing element 140 is provided between the heat dissipation surface 1121 and the second mating surface 1242. The second sealing element 140 can be a waterproof rubber part, silicone part, etc. In this embodiment, the material of the first sealing element 130 is not limited. The first sealing element 130 and the second sealing element 140 together form a double sealing effect, which is conducive to further improving the tightness of the connection between the connecting foot 124 and the connecting boss 113, ensuring the sealing performance of the liquid cooling plate 100, preventing coolant from overflowing, and thus ensuring that the liquid cooling plate 100 can work continuously, safely and stably.

[0065] See also some of the possible implementation methods. Figures 1 to 5 and Figures 9 to 11 As shown, the heat dissipation surface 1121 of this application embodiment is also provided with a plurality of hole groups corresponding to the connecting boss 113. Each hole group includes a first mounting hole 1124 disposed around the corresponding connecting boss 113. The connecting foot 124 is provided with a plurality of second mounting holes 1243 corresponding to the first mounting hole 1124. The second cold plate 120 and the first cold plate 110 are connected by fasteners passing through the first mounting hole 1124 and the second mounting hole 1243.

[0066] In specific implementation, the fastener can be a bolt, screw or other connector. This application embodiment does not limit the fastener. The fastener passes through the first mounting hole 1124 and the second mounting hole 1243 in sequence to connect the connecting foot 124 to the heat dissipation surface 1121. It should be noted that the first mounting hole 1124 should avoid the first heat dissipation channel 111 to prevent coolant overflow. For example, the first mounting hole 1124 can be symmetrically distributed on both sides of the liquid delivery channel 1111 or the liquid return channel 1112, which can ensure the stable connection between the second cold plate 120 and the first cold plate 110, and also prevent the first mounting hole 1124 from affecting the layout of the first heat dissipation channel 111.

[0067] See also some of the possible implementation methods. Figure 1 , Figure 2 and Figure 4As shown, the second heat dissipation channel 121 in this embodiment includes a first sub-channel 1211 and a second sub-channel 1212 distributed along a third direction. Both ends of either the first sub-channel 1211 or the second sub-channel 1212 are connected to the liquid inlet 122 and the liquid outlet 123.

[0068] It should be noted that a first sub-channel 1211 and a second sub-channel 1212 are provided, with the first sub-channel 1211 being higher than the second sub-channel 1212. The liquid inlet 122 can simultaneously supply coolant to both the first sub-channel 1211 and the second sub-channel 1212, thereby ensuring that coolant is injected into both the upper and lower parts of the second cold plate 120 along a third direction at the same time, so that the temperature of each part of the second cold plate 120 remains consistent, which is beneficial to improving the temperature uniformity of the battery.

[0069] The specific connection method between the first sub-channel 1211 and the second sub-channel 1212 and the liquid outlet 123 or the liquid inlet 122 is not limited in this embodiment. For example, a receiving cavity 125 communicating with the liquid inlet 122 can be provided above the liquid inlet 122. The second heat dissipation channel 121 may also include a branch channel 1213, which includes a main channel 1213a, a first branch channel 1213b, and a second branch channel 1213c. One end of the main flow channel 1213a is connected to the receiving cavity 125, and the other end of the main flow channel 1213a is connected to both the first branch flow channel 1213b and the second branch flow channel 1213c. The first branch flow channel 1213b is higher than the second branch flow channel 1213c, and the main flow channel 1213a is flush with the first branch flow channel 1213b. The first branch flow channel 1213b is connected to the first sub-flow channel 1211, and the second branch flow channel 1213c is connected to the second sub-flow channel 1212. Coolant enters the receiving cavity 125 through the inlet 122. When the coolant in the receiving cavity 125 reaches a certain height, the coolant enters the main channel 1213a and is then split into the first branch channel 1213b and the second branch channel 1213c. This ensures that coolant is injected into the first sub-channel 1211 and the second sub-channel 1212 at the same time, avoiding the problem that the coolant can only enter the first sub-channel 1211 after the second sub-channel 1212 is full due to gravity. This helps to improve the uniformity of temperature distribution on the second cold plate 120.

[0070] See also some of the possible implementation methods. Figures 1 to 5 As shown, the first cold plate 110 in this embodiment includes a bottom plate 114 and a top plate 112. The bottom plate 114 and the top plate 112 are welded together. The top plate 112 forms a heat dissipation surface 1121. The first heat dissipation channel 111 is formed by protruding from the bottom plate 114 in a direction away from the top plate 112.

[0071] Furthermore, the first heat dissipation channel 111 is formed by protrusion in the bottom plate 114 away from the top plate 112, which can ensure that the top plate 112 forms a smooth plane so that the bottom surface of the battery can fully contact the top plate 112, ensuring the heat dissipation efficiency of the first cold plate 110, and at the same time helping to ensure the stability of the connection between the battery and the top plate 112, and ensuring the safe and stable operation of the battery pack.

[0072] See Figure 1 As shown in the embodiment of this application, a battery pack is also provided, including: a housing assembly, any of the above-mentioned liquid cooling plates 100, and a plurality of batteries, wherein the housing assembly has a receiving cavity; the liquid cooling plate 100 is disposed in the receiving cavity; at least a portion of the plurality of batteries are disposed in the placement space of the liquid cooling plate 100, the bottom surface of the battery is in thermally conductive contact with the first cold plate 110 of the liquid cooling plate 100, and the side surface of the battery is in thermally conductive contact with the second cold plate 120 of the liquid cooling plate 100.

[0073] The structure and working principle of the liquid cooling plate 100 have been described in detail in the above embodiments, and will not be repeated here.

[0074] In this embodiment of the application, by installing any of the liquid cooling plates 100 described above in the receiving cavity, the number of delivery pipes in the battery pack can be reduced while ensuring the heat dissipation efficiency of the battery in the battery pack. This simplifies the arrangement of the pipes, helps to reduce the volume occupied by the delivery pipes, and thus reduces the volume of the battery pack.

[0075] In summary, the liquid cooling plate 100 and battery pack provided in this application embodiment include a housing assembly, a liquid cooling plate 100, and multiple batteries. The liquid cooling plate 100 is located within the receiving cavity formed by the housing assembly. The liquid cooling plate 100 includes a first cold plate 110 and multiple second cold plates 120. The second cold plates 120 are spaced apart along a first direction on the heat dissipation surface 1121 of the first cold plate 110. The batteries are disposed between two adjacent second cold plates 120, so that the bottom surface of the battery is in thermal contact with the heat dissipation surface 1121, and the two sides of the battery are in thermal contact with the second cold plates 120, thereby ensuring the heat dissipation efficiency of the battery pack. The first cold plate 110 has a first heat dissipation channel 111, and the second cold plate 120 has a second heat dissipation channel 121. The first heat dissipation channel 111 and the second heat dissipation channel 121 are connected. When the liquid cooling plate 100 is running, the coolant enters the first heat dissipation channel 111 through the delivery pipe, and then enters the second heat dissipation channel 121 from the first heat dissipation channel 111. After completing the circulation in the second cold plate 120, it returns to the first heat dissipation channel 111, and the coolant is output through the delivery pipe of the first heat dissipation channel 111. In this way, compared with the prior art in which corresponding delivery pipes are set on the first cold plate 110 and each second cold plate 120, the liquid cooling plate 100 provided in this application embodiment only needs to be set with a set of delivery pipes connected to the first heat dissipation channel 111 to complete the coolant delivery work of the entire liquid cooling plate 100. This effectively reduces the number of delivery pipes in the battery pack, which is conducive to simplifying the arrangement of delivery pipes, saving the space occupied by delivery pipes, and thus reducing the volume of the battery pack.

[0076] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0077] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0078] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0079] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0080] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three cases: A exists alone, A and B exist simultaneously, and B exists alone.

[0081] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0082] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0083] Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this application are indicated by the following claims.

[0084] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A liquid cooling plate (100) for dissipating heat from a battery, characterized in that, include: The first cold plate (110) has a first heat dissipation channel (111) inside, and the first cold plate (110) has a heat dissipation surface (1121) for thermally contacting the bottom surface of the battery. Multiple second cold plates (120) are arranged along a first direction and vertically fixed to the heat dissipation surface (1121). Two adjacent second cold plates (120) are spaced apart to define a placement space for accommodating the battery. The second cold plates (120) are used for thermally conductive contact with the side of the battery. The second cold plates (120) are provided with second heat dissipation channels (121), which are connected to the first heat dissipation channel (111). The first heat dissipation channel (111) includes a liquid delivery channel (1111) and a liquid return channel (1112) arranged opposite to each other along the second direction. The second cold plate (120) has a bottom wall facing the first cold plate (110). The bottom wall has a liquid inlet (122) and a liquid outlet (123) communicating with the second heat dissipation channel (121) at both ends along the second direction. The liquid inlet (122) is connected to the liquid delivery channel (1111), and the liquid outlet (123) is connected to the liquid return channel (1112). The heat dissipation surface (1121) is provided with a liquid inlet (1122) and a liquid return outlet (1123) corresponding to the second cold plate (120). The liquid inlet (1122) is connected to the liquid delivery channel (1111), and the liquid return outlet (1123) is connected to the liquid return channel (1112). The inlet (122) is connected to the outlet (1122), and the return outlet (1123) is connected to the outlet (123); The heat dissipation surface (1121) has a connecting boss (113) that corresponds one-to-one with the liquid inlet (1122) and the liquid return port (1123). The liquid inlet (1122) and the liquid return port (1123) are both located on the corresponding connecting boss (113). The bottom wall of the second cold plate (120) is provided with connecting feet (124) at both ends. The connecting feet (124) are covered on the outside of the connecting boss (113). The liquid inlet (122) and the liquid outlet (123) are both formed on the corresponding connecting feet (124). The connecting foot (124) has a first mating surface (1241) that fits against the end face of the connecting boss (113). The liquid cooling plate (100) also includes: The first sealing element (130) corresponds one-to-one with the connecting boss (113). The first sealing element (130) is placed on the end face of the corresponding connecting boss (113) to seal the gap between the end face of the connecting boss (113) and the first mating surface (1241). The connecting foot (124) has a second mating surface (1242) that fits against the heat dissipation surface (1121). The liquid cooling plate (100) also includes: The second sealing element (140) corresponds one-to-one with the connecting boss (113). The second sealing element (140) is sleeved on the outside of the corresponding connecting boss (113) to seal the gap between the heat dissipation surface (1121) and the second mating surface (1242).

2. The liquid-cooled plate (100) according to claim 1, characterized in that, The heat dissipation surface (1121) is also provided with a plurality of hole groups corresponding to the connecting boss (113), and each hole group includes a first mounting hole (1124) disposed around the corresponding connecting boss (113). The connecting foot (124) is provided with a plurality of second mounting holes (1243) corresponding to the first mounting hole (1124). The second cold plate (120) and the first cold plate (110) are connected by fasteners passing through the first mounting hole (1124) and the second mounting hole (1243).

3. The liquid-cooled plate (100) according to claim 1 or 2, characterized in that, The second heat dissipation channel (121) includes a first sub-channel (1211) and a second sub-channel (1212) distributed along a third direction, wherein both ends of either the first sub-channel (1211) or the second sub-channel (1212) are connected to the liquid inlet (122) and the liquid outlet (123).

4. The liquid-cooled plate (100) according to claim 1 or 2, characterized in that, The first cold plate (110) includes: A base plate (114) and a top plate (112) are welded together. The top plate (112) forms the heat dissipation surface (1121). The first heat dissipation channel (111) is formed by the base plate (114) protruding in a direction away from the top plate (112).

5. A battery pack, characterized in that, include: Housing assembly having a receiving cavity; The liquid cooling plate (100) according to any one of claims 1-4 is disposed in the receiving cavity; Multiple batteries, at least some of which are disposed in the placement space of the liquid cooling plate (100), the bottom surface of which is in thermal contact with the first cold plate (110) of the liquid cooling plate (100), and the side surface of which is in thermal contact with the second cold plate (120) of the liquid cooling plate (100).

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