Liquid Cooling Plate, Liquid Cooling System and Battery Pack

Abstract

The present invention discloses a liquid cooling plate, a liquid cooling system and a battery pack. The liquid cooling plate includes: a plate body having a receiving cavity for receiving a coolant therein, and through holes communicating with the receiving cavity are provided on the outer surface of the plate body, and the through holes are multiple and spaced apart; a hot melt member, and a hot melt member is provided in each through hole for blocking the through hole, and at least part of the hot melt member has a cavity therein, and salt powder is filled in the cavity. According to the liquid cooling plate of the present invention, part of the hot melt member will be melted, so that the through hole corresponding to the melted hot melt member is opened, and the coolant located in the receiving cavity flows out from the opened through hole, thereby realizing rapid cooling. At the same time, when the liquid cooling plate is applied to the battery pack, after the hot melt member having a cavity and filled with salt powder therein is heated and melted, the salt powder is released and dissolved in the coolant, so that the coolant is transformed into a salt solution, and the battery pack is immersed in the salt solution to slowly release electric energy until the power is drained, thereby completely blocking the possibility of the battery pack reigniting.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and in particular to a liquid cooling plate, a liquid cooling system and a battery pack. Background Art

[0002] During the operation of the battery pack, abnormal conditions such as overcharging, overheating, internal short circuit, extrusion or impact may occur in the battery cells. In these abnormal conditions, the battery cells are prone to thermal runaway and even the risk of fire. At the same time, after a single battery cell catches fire, it will trigger thermal runaway of other battery cell units inside the battery module, and then cause a larger-scale fire or even explosion. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. For this purpose, the present invention provides a liquid cooling plate. After the heat-melting part filled with salt powder in the liquid cooling plate is melted, the salt powder located in the cavity is released and dissolved in the coolant, so that the coolant is transformed into a salt solution, thereby achieving rapid cooling and temperature reduction.

[0004] The present invention also provides a liquid cooling system, which includes the above-mentioned liquid cooling plate.

[0005] The present invention also provides a battery pack, and the liquid cooling system includes the above-mentioned liquid cooling system.

[0006] The liquid cooling plate according to an embodiment of the present invention includes: a plate body, which has a receiving cavity for receiving a coolant, and the outer surface of the plate body has through holes communicating with the receiving cavity, and the through holes are a plurality of spaced-apart ones; a heat-melting part, and each through hole is provided with the heat-melting part for blocking the through hole, and at least part of the heat-melting part has a cavity filled with salt powder.

[0007] For the liquid cooling plate according to an embodiment of the present invention, the plate body has a receiving cavity for receiving a coolant, the outer surface of the plate body has through holes communicating with the receiving cavity, the through holes are a plurality of spaced-apart ones, and each through hole is provided with a heat-melting part for blocking the through hole. When the temperature of the environment where some of the heat-melting parts among the plurality of heat-melting parts on the liquid cooling plate gradually rises to be greater than or equal to the melting point of the heat-melting part, this part of the heat-melting part is melted, so that the through hole corresponding to the melted heat-melting part is opened, and the coolant located in the receiving cavity flows out from the opened through hole, thereby achieving rapid cooling and temperature reduction. And at least part of the heat-melting part has a cavity filled with salt powder, so that after the heat-melting part with a cavity filled with salt powder is melted by heat, the salt powder located in the cavity is released and dissolved in the coolant, so that the coolant is transformed into a salt solution, further ensuring the cooling and temperature reduction effect. At the same time, when the liquid cooling plate is applied to the battery pack, by transforming the coolant into a salt solution, the battery pack is immersed in the salt solution and slowly discharges electric energy until the power is drained, thereby completely blocking the possibility of the battery pack reigniting.

[0008] In some embodiments of the present invention, the salt powder is CuCl2 or CuSo4.

[0009] In some embodiments of the present invention, it further includes: a linkage mechanism, the linkage mechanism is arranged in the accommodation cavity, the linkage mechanism is connected to each of the hot-melt members, and the linkage mechanism is configured to be released and drive at least a part of the remaining hot-melt members to open the corresponding through holes when at least one of the hot-melt members melts, and after the hot-melt member having the cavity opens the through hole, the cavity is opened.

[0010] In some embodiments of the present invention, the linkage mechanism includes: a plurality of elastic pieces, the plurality of elastic pieces correspond to the plurality of through holes one by one, both ends of each elastic piece in the length direction are a first end and a second end respectively, the first end is connected to the plate body, the second end is connected to the corresponding hot-melt member, when the elastic piece is in a connected state with the hot-melt member and all the hot-melt members are located in the through holes, the second end has a tendency to move away from the hot-melt member, the plurality of elastic pieces are arranged in sequence, and after the second end of one of the elastic pieces is released, it moves towards the next elastic piece and contacts the next elastic piece to drive the next elastic piece to drive the corresponding hot-melt member to open the corresponding through hole.

[0011] In some embodiments of the present invention, the plurality of through holes are spaced apart along the circumferential direction of the plate body, and the plurality of elastic pieces are spaced apart along the circumferential direction of the plate body.

[0012] In some embodiments of the present invention, the hot-melt members having the cavity are multiple and are evenly spaced along the circumferential direction of the plate body.

[0013] In some embodiments of the present invention, the linkage mechanism further includes: a plurality of steel cables, and the second end of each elastic piece is connected to the hot-melt member through a steel cable.

[0014] In some embodiments of the present invention, at least one surface in the thickness direction of the hot-melt member has an annular groove extending along the circumferential direction of the hot-melt member, the annular groove is opposite to the cavity, the annular groove divides the hot-melt member into a moving part and a fixed part located outside the moving part, and the linkage mechanism is connected to the moving part.

[0015] In some embodiments of the present invention, the peripheral wall of the moving part has a protrusion, and the inner peripheral wall of the fixed part has a notch that cooperates with the protrusion, and the linkage mechanism is connected to the protrusion.

[0016] In some embodiments of the present invention, the size of the through-hole where the hot-melt part with the cavity is located is larger than the size of the through-hole where the hot-melt part without the cavity is located.

[0017] In some embodiments of the present invention, the hot-melt part is an ABS part.

[0018] The liquid cooling system according to an embodiment of the present invention includes the above-mentioned liquid cooling plate.

[0019] The liquid cooling system according to an embodiment of the present invention is provided with a liquid cooling plate. The plate body has a receiving cavity for receiving a coolant. The outer surface of the plate body has through-holes communicating with the receiving cavity. The through-holes are multiple and spaced apart. Each through-hole is provided with a hot-melt part for blocking the through-hole. When the temperature of the environment where some of the hot-melt parts among the multiple hot-melt parts on the liquid cooling plate gradually rises to be greater than or equal to the melting point of the hot-melt part, this part of the hot-melt part is melted, so that the through-hole corresponding to the melted hot-melt part is opened, and the coolant located in the receiving cavity flows out from the opened through-hole, thereby achieving rapid cooling. And by having cavities in at least part of the hot-melt parts, and salt powder is filled in the cavities, so that after the hot-melt parts with cavities and filled with salt powder are heated and melted, the salt powder in the cavities is released and dissolved in the coolant, so that the coolant is transformed into a salt solution, further ensuring the cooling effect. At the same time, when the liquid cooling system is applied to a battery pack, by transforming the coolant into a salt solution, the battery pack is immersed in the salt solution and slowly discharges electrical energy until the power is exhausted, thereby completely blocking the possibility of the battery pack reigniting.

[0020] The battery pack according to an embodiment of the present invention includes: a housing; a battery module, the battery module is arranged in the housing; the above-mentioned liquid cooling system, the liquid cooling plate is arranged in the housing and is attached to the battery module.

[0021] The battery pack according to an embodiment of the present invention is provided with a liquid cooling system. The plate body has a receiving cavity for receiving a coolant. The outer surface of the plate body has through-holes communicating with the receiving cavity. The through-holes are multiple and spaced apart. Each through-hole is provided with a hot-melt part for blocking the through-hole. When the temperature of the environment where some of the hot-melt parts among the multiple hot-melt parts on the liquid cooling plate gradually rises to be greater than or equal to the melting point of the hot-melt part, this part of the hot-melt part is melted, so that the through-hole corresponding to the melted hot-melt part is opened, and the coolant located in the receiving cavity flows out from the opened through-hole, thereby achieving rapid cooling. And by having cavities in at least part of the hot-melt parts, and salt powder is filled in the cavities, so that after the hot-melt parts with cavities and filled with salt powder are heated and melted, the salt powder in the cavities is released and dissolved in the coolant, so that the coolant is transformed into a salt solution, and the battery pack is immersed in the salt solution and slowly discharges electrical energy until the power is exhausted, completely blocking the possibility of the battery pack reigniting, and further improving safety.

[0022] In some embodiments of the present invention, it further includes: a partition assembly, which is arranged in the housing to divide the space in the housing into a plurality of spaced sub-spaces. The battery module includes a plurality of sub-modules, and the plurality of sub-modules are respectively arranged in the plurality of sub-spaces. There are a plurality of the liquid cooling plates, and the plurality of liquid cooling plates are respectively arranged in the plurality of sub-spaces and are attached to the corresponding sub-modules.

[0023] In some embodiments of the present invention, the liquid cooling plate is arranged on the side of the sub-module, and the through holes are arranged on the surface of the plate body facing the sub-module.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, where:

[0026] Figure 1 is a structural diagram of a battery pack according to an embodiment of the present invention;

[0027] Figure 2 is a structural diagram of a liquid cooling system according to an embodiment of the present invention;

[0028] Figure 3 is Figure 2 an enlarged view at F in

[0029] Figure 4 is a structural diagram of a liquid cooling plate according to an embodiment of the present invention;

[0030] Figure 5 is an internal structural diagram of a liquid cooling plate according to an embodiment of the present invention, where all through holes are not opened;

[0031] Figure 6 is Figure 5 an enlarged view at A in

[0032] Figure 7 is an internal structural diagram of a liquid cooling plate according to an embodiment of the present invention, where one through hole is opened;

[0033] Figure 8 is Figure 7 an enlarged view at B in

[0034] Figure 9 is an internal structural diagram of a liquid cooling plate according to an embodiment of the present invention, where two through holes are opened;

[0035] Figure 10 is Figure 9 an enlarged view at C in

[0036] Figure 11 is Figure 9 The enlarged view of part D in

[0037] Figure 12 The internal structure diagram of the liquid cooling plate according to the embodiment of the present invention, in which all through holes are opened;

[0038] Figure 13 is Figure 12 The enlarged view of part E in

[0039] Figure 14 The structure diagram of the sub-module according to the embodiment of the present invention.

[0040] Reference numerals:

[0041] 1000, battery pack;

[0042] 100, liquid cooling system;

[0043] 1, liquid cooling plate; 11, plate body; 111, through hole; 112, accommodation cavity; 113, liquid inlet; 114, liquid outlet; 12, hot melt part; 12a, first hot melt part; 12b, second hot melt part; 121, annular groove; 122, moving part; 1221, protrusion; 123, fixing part; 1231, notch; 134, cavity; 13, linkage mechanism; 131, elastic sheet; 131a, first elastic sheet; 131b, second elastic sheet; 131c, third elastic sheet; 1311, first end; 1312, second end; 132, steel cable;

[0044] 2, cooling pipeline; 21, connecting pipeline; 22, liquid inlet pipe; 23, liquid outlet pipe;

[0045] 200, housing;

[0046] 300, battery module; 301, sub-module; 3011, battery cell; 3012, end plate; 3013, annular tie;

[0047] 400, partition assembly;

[0048] 500, sub-space. Detailed implementation manners

[0049] The embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0050] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, the meaning of "a plurality" is two or more.

[0051] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0052] The liquid cooling plate 1 according to an embodiment of the present invention will be described below with reference to the drawings.

[0053] As Figure 4 、 Figures 9 - 13 shown, the liquid cooling plate 1 according to an embodiment of the present invention includes a plate body 11 and a hot melt member 12.

[0054] Specifically, the plate body 11 has a receiving cavity 112 for receiving a coolant. Thus, the liquid cooling plate 1 has a lower temperature, so that the liquid cooling plate 1 cools down the device attached thereto. For example, when the liquid cooling plate 1 is applied to the battery pack 1000, when the battery pack 1000 is operating normally, the liquid cooling plate 1 is used to cool down the battery module 300 in the housing 200 of the battery pack 1000, taking away the heat dissipated by the battery module 300, thereby realizing the heat dissipation of the battery module 300 and ensuring the performance of the battery pack 1000.

[0055] The outer surface of the plate body 11 has through holes 111 communicating with the receiving cavity 112, and a hot melt member 12 is provided in each through hole 111 for blocking the through hole 111. At least part of the hot melt member 12 has a cavity 134, and salt powder is filled in the cavity 134. It can be understood that when the temperature of the environment where the liquid cooling plate 1 is located is lower than the melting point of the hot melt member 12, the hot melt member 12 blocks the through hole 111, and the liquid cooling plate 1 cools down the device attached thereto;

[0056] When the temperature of the environment where some of the multiple hot-melt parts 12 on the liquid cooling plate 1 gradually rises to be greater than or equal to the melting point of the hot-melt parts 12, these part of the hot-melt parts 12 are melted, so that the through holes 111 corresponding to the melted hot-melt parts 12 are opened, and the coolant in the accommodation cavity 112 flows out from the opened through holes 111, thereby realizing the rapid cooling of the device attached to the liquid cooling plate 1, and improving the safety of the device using the liquid cooling plate 1. At the same time, after the hot-melt part 12 with a cavity 134 filled with salt powder inside is heated and melted, the salt powder in the cavity 134 is released and dissolved into the coolant, so that the coolant is transformed into a salt solution, further ensuring the cooling effect. In addition, the salt powder filled in the cavity 134 is in powder form, which is convenient for the salt powder to dissolve into the coolant to form a salt solution, further improving the reliability of the device using the liquid cooling plate 1.

[0057] For example, when the liquid cooling plate 1 is applied to the battery pack 1000, when an abnormal condition occurs inside the battery pack 1000, such as when the battery pack 1000 has a thermal runaway, the ejected gases such as high-temperature flue gas released will melt some of the hot-melt parts 12, so that the through holes 111 corresponding to the melted hot-melt parts 12 are opened, and the coolant in the accommodation cavity 112 flows out from the opened through holes 111, and the battery pack 1000 is rapidly cooled by means of evaporation heat transfer, flow heat transfer, etc., delaying the thermal propagation speed of the battery pack 1000, reducing the possibility of the flame directly breaking through the shell of the battery pack 1000 and exploding, and improving the safety of the battery pack 1000 using the liquid cooling plate 1. At the same time, when the hot-melt part 12 with a cavity 134 filled with salt powder inside is heated and melted, the salt powder in the cavity 134 is released and dissolved into the coolant, so that the coolant is transformed into a salt solution, and the battery pack 1000 is soaked in the salt solution and slowly discharges electric energy until the power is drained, completely blocking the possibility of the battery pack 1000 reigniting, and further improving the safety.

[0058] Furthermore, as Figure 1 shown, there are multiple liquid cooling plates 1, and the battery pack 1000 includes battery modules 300. Each sub-module 301 constituting the battery module 300 is attached to at least one liquid cooling plate 1, and each battery cell 3011 constituting the sub-module 301 is at least in contact with at least one hot-melt part 12. Thus, when any battery cell 3011 has a thermal runaway, the temperature is transmitted to the corresponding hot-melt part 12 to melt it to open the through hole 111, and the coolant flows out from the opened through hole 111 onto the corresponding sub-module 301, thereby delaying the thermal propagation speed of the battery cell 3011 and further improving the safety.

[0059] Even further, as Figure 1As shown, the housing 200 of the battery pack 1000 is divided into a plurality of sub-spaces 500 by a plurality of partition components 400 disposed within the housing 200. The plurality of sub-spaces 500 are independent of each other, and the plurality of self-modules that make up the battery module 300 are respectively disposed within the plurality of sub-spaces 500. There are a plurality of liquid cooling plates 1, and the plurality of liquid cooling plates 1 are respectively disposed within the plurality of sub-spaces 500 and are in contact with the corresponding sub-modules 301. Thus, when any one of the sub-modules 301 undergoes thermal runaway, since each sub-module 301 is respectively disposed within the plurality of sub-spaces 500, the coolant only fills the sub-space 500 where the sub-module 301 that has undergone thermal runaway is located and does not flow to other sub-spaces 500, thereby enabling the coolant to quickly soak the entire sub-module 301 and achieving rapid cooling while not affecting other sub-modules 301.

[0060] For the liquid cooling plate 1 according to an embodiment of the present invention, the plate body 11 has a receiving cavity 112 for receiving the coolant, and the outer surface of the plate body 11 has through holes 111 communicating with the receiving cavity 112. The through holes 111 are a plurality of spaced-apart ones, and each through hole 111 is provided with a heat-melting member 12 for blocking the through hole 111. When the temperature of the environment where some of the heat-melting members 12 among the plurality of heat-melting members 12 on the liquid cooling plate 1 gradually rises to be greater than or equal to the melting point of the heat-melting member 12, the part of the heat-melting member 12 is melted, so that the through hole 111 corresponding to the melted heat-melting member 12 is opened, and the coolant located within the receiving cavity 112 flows out from the opened through hole 111, thereby achieving rapid cooling and temperature reduction. And at least part of the heat-melting member 12 has a cavity 134, and the cavity 134 is filled with salt powder, so that the salt powder located within the cavity 134 is released and dissolved into the coolant after the heat-melting member 12 having the cavity 134 and filled with salt powder is heated and melted, so that the coolant is transformed into a salt solution, further ensuring the cooling and temperature reduction effect. At the same time, when the liquid cooling plate 1 is applied to the battery pack 1000, by transforming the coolant into a salt solution, the battery pack 1000 is immersed in the salt solution to slowly release electric energy until the power is drained, thereby completely blocking the possibility of the battery pack reigniting.

[0061] In some embodiments of the present invention, the salt powder is CuCl2 or CuSo4. Since CuCl2 and CuSo4 are easily soluble in the coolant, when the heat-melting member 12 having the cavity 134 and filled with salt powder is heated and melted, the salt powder located within the cavity 134 is released and dissolved into the coolant, so that the coolant is transformed into a salt solution, thereby improving the reliability of the liquid cooling plate 1. It should be noted that the salt powder can also be other materials in powder form that are soluble in the coolant.

[0062] In some embodiments of the present invention, such as Figures 5 - 13As shown, the liquid cooling plate 1 further includes a linkage mechanism 13. Among them, the linkage mechanism 13 is disposed in the accommodation cavity 112. The linkage mechanism 13 is connected to each hot melt member 12. The linkage mechanism 13 is configured such that when at least one hot melt member 12 melts, the linkage mechanism 13 is released and drives at least a part of the remaining at least part of the hot melt members 12 to open the corresponding through holes 111. And after the hot melt member 12 having the cavity 134 opens the through hole 111, the cavity 134 is opened.

[0063] It can be understood that when at least one hot melt member 12 melts, the linkage mechanism 13 is released and drives at least a part of the remaining at least part of the hot melt members 12 to open the corresponding through holes 111, so that at least some of the through holes 111 are opened in sequence, and the coolant flows out from the opened through holes 111, thereby increasing the outflow speed of the coolant in the accommodation cavity 112 and improving the cooling effect. At the same time, after the hot melt member 12 having the cavity 134 opens the through hole 111, the cavity 134 is opened, so that the salt powder located in the cavity 134 is released and dissolved in the coolant, thereby turning the coolant into a salt solution and further ensuring the cooling effect.

[0064] For example, when the liquid cooling plate 1 is applied to the battery pack 1000, when an abnormal condition occurs inside the battery pack 1000, such as when the battery pack 1000 undergoes thermal runaway, high-temperature flue gas is released, resulting in a local increase in the temperature inside the battery pack 1000. The hot melt member 12 located in the high-temperature area melts. At this time, the linkage mechanism 13 is released, and the linkage mechanism 13 can drive at least a part of the remaining at least part of the hot melt members 12 to open the corresponding through holes 111 in sequence. The coolant flows from the opened through holes 111 into the housing 200 of the battery pack 1000. Thus, the outflow speed of the coolant is increased, and rapid cooling of the battery pack 1000 is achieved. At the same time, after the hot melt member 12 having the cavity 134 opens the through hole 111, the cavity 134 is opened, thereby turning the coolant into a salt solution, so that the battery pack 1000 is immersed in the salt solution and slowly discharges electrical energy until the power is exhausted, completely blocking the possibility of the battery pack 1000 reigniting, and further improving the safety of the battery pack 1000 applying the liquid cooling plate 1.

[0065] It should be noted that except for the first hot melt member 12 being heated and melted to open the corresponding through hole 111, the remaining hot melt members 12 can open the corresponding through holes 111 under the drive of the linkage mechanism 13 or be directly heated and melted to open the corresponding through holes 111.

[0066] In some embodiments of the present invention, such as Figures 5 - 13As shown, the linkage mechanism 13 includes a plurality of elastic pieces 131. Among them, the plurality of elastic pieces 131 correspond one-to-one with the plurality of through holes 111. The two ends of each elastic piece 131 in the length direction are respectively a first end 1311 and a second end 1312. The first end 1311 is connected to the plate body 11, and the second end 1312 is connected to the corresponding heat fusion piece 12. When the elastic piece 131 is connected to the heat fusion piece 12 and all the heat fusion pieces 12 are located in the through holes 111, the second end 1312 has a tendency to move away from the heat fusion piece 12. The plurality of elastic pieces 131 are arranged in sequence. After the second end 1312 of one of the elastic pieces 131 is released, it moves towards the next elastic piece 131 and contacts the next elastic piece 131 to drive the next elastic piece 131 to drive the corresponding heat fusion piece 12 to open the corresponding through hole 111.

[0067] It can be understood that, as Figures 5 - 8 shown, due to the tendency of the second end 1312 of the elastic piece 131 to move away from the heat fusion piece 12, after the first heat fusion piece 12 is heated and melted, the second end 1312 of the first elastic piece 131 (such as Figure 8 the first elastic piece 131a shown) is released. The first elastic piece 131 converts elastic potential energy into kinetic energy. Thus, the second end 1312 of the first elastic piece 131 moves towards the second elastic piece 131 and contacts the second elastic piece 131 (such as Figure 8 the second elastic piece 131b shown) to drive the second elastic piece 131 to drive the corresponding heat fusion piece 12 to open the corresponding through hole 111.

[0068] At the same time, as Figure 9 and Figure 10 shown, after the second elastic piece 131 drives the corresponding heat fusion piece 12 to open the corresponding through hole 111, the second end 1312 of the second elastic piece 131 is released. The second elastic piece 131 converts elastic potential energy into kinetic energy. Thus, the second end 1312 of the second elastic piece 131 moves towards the third elastic piece 131 (such as Figure 10 the third elastic piece 131c shown) and contacts the third elastic piece 131 to drive the third elastic piece 131 to drive the corresponding heat fusion piece 12 to open the corresponding through hole 111, and sequentially drive the next elastic piece 131. Until the plurality of elastic pieces 131 arranged in sequence behind drive the corresponding heat fusion pieces 12 to open the corresponding through holes 111 one by one, so as to realize the linkage trigger of the plurality of elastic pieces 131, so that the coolant can flow out from more through holes 111, thereby increasing the outflow speed of the coolant in the accommodation cavity 112, and further improving the cooling effect of the liquid cooling plate 1. In addition, as Figures 11 - 13 shown, after the elastic piece 131 drives the heat fusion piece 12 with a cavity 134 to open the corresponding through hole 111, the cavity 134 is opened, so that the salt powder in the cavity 134 is released and dissolved in the coolant, thereby turning the coolant into a salt solution, further ensuring the cooling effect.

[0069] After the second end 1312 of one of the elastic pieces 131 is released, it moves towards the next elastic piece 131 and contacts the next elastic piece 131 to drive the next elastic piece 131 to drive the corresponding heat-melting piece 12 to open the corresponding through hole 111. Such a mechanical triggering method has higher reliability compared to circuit control. For example, when the liquid cooling plate 1 is applied to the battery pack 1000, in the case where the circuit is burned out due to thermal runaway of the battery pack 1000, the corresponding heat-melting pieces 12 can still be driven by the plurality of elastic pieces 131 one by one to open the corresponding through holes 111 so that the coolant can quickly flow out from more through holes 111, improving the reliability of the liquid cooling plate 1.

[0070] Furthermore, the elastic piece 131 is made of high-carbon steel. Since high-carbon steel has high strength and wear resistance after heat treatment and cold drawing hardening, has a certain degree of flexibility and plasticity, and has a low cost, by setting the elastic piece 131 as a high-carbon steel piece, the cost of the liquid cooling plate 1 can be reduced while meeting the linkage trigger between each elastic piece 131.

[0071] Even further, as Figure 6 shown, the first end 1311 of each elastic piece 131 is connected to the inner peripheral wall of the accommodation cavity 112. When the elastic piece 131 is connected to the heat-melting piece 12 and the heat-melting piece 12 is located in the through hole 111, the angle between the elastic piece 131 and the inner peripheral wall of the accommodation cavity 112 is 10° - 50°. When the elastic piece 131 is in a free state, the angle between the elastic piece 131 and the inner peripheral wall of the accommodation cavity 112 is 70° - 110°.

[0072] It can be understood that when the elastic piece 131 is connected to the heat-melting piece 12 and the heat-melting piece 12 is located in the through hole 111, the angle between the elastic piece 131 and the inner peripheral wall of the accommodation cavity 112 is 10°, 15°, 20°, 25°, 30°, 35°, 40° or 50°. When the elastic piece 131 is in a free state, the angle between the elastic piece 131 and the inner peripheral wall of the accommodation cavity 112 is 70°, 75°, 80°, 85°, 90°, 95°, 100°, 105° or 110°. Thus, through such an angle setting, the linkage trigger between each elastic piece 131 is realized, so that after the second end 1312 of one of the elastic pieces 131 is released, it moves towards the next elastic piece 131 and contacts the next elastic piece 131 to drive the next elastic piece 131 to drive the corresponding heat-melting piece 12 to open the corresponding through hole 111. Preferably, when the elastic piece 131 is connected to the heat-melting piece 12 and the heat-melting piece 12 is located in the through hole 111, the angle between the elastic piece 131 and the inner peripheral wall of the accommodation cavity 112 is 30°, and when the elastic piece 131 is in a free state, the angle between the elastic piece 131 and the inner peripheral wall of the accommodation cavity 112 is 90°.

[0073] In some embodiments of the present invention, asFigure 5 , Figure 7 , Figure 9 and Figure 12 As shown in Figure 5 , Figure 7 , Figure 9 and Figure 12 , a plurality of through holes 111 are spaced apart along the circumferential direction of the plate body 11, and a plurality of elastic pieces 131 are spaced apart along the circumferential direction of the plate body 11. Thus, through such a setting, after the second end 1312 of at least one elastic piece 131 is released, each of the remaining elastic pieces 131 will be driven one by one to drive the corresponding heat-melting member 12 to open the corresponding through hole 111, so as to realize that each through hole 111 is opened, so that the coolant in the accommodating cavity 112 can flow out from each through hole 111, improving the outflow speed of the coolant and ensuring the cooling effect of the liquid cooling plate 1.

[0074] For example, as Figure 1 and Figure 2 shown, when the liquid cooling plate 1 is applied to the battery pack 1000, there are a plurality of liquid cooling plates 1, a plurality of through holes 111 are spaced apart along the circumferential direction of the plate body 11, and the liquid cooling plate 1 is arranged on the side of the sub-module 301. Thus, when any sub-module 301 has a thermal runaway, due to the plurality of through holes 111 being spaced apart along the circumferential direction of the plate body 11, the coolant can be emptied from the accommodating cavity 112 as much as possible through the through hole 111 at the lowest point along the height direction of the sub-module 301, so as to achieve more efficient cooling.

[0075] In some embodiments of the present invention, as Figure 9 and Figure 11 shown, there are a plurality of heat-melting members 12 having cavities 134 and they are evenly spaced along the circumferential direction of the plate body 11. Thus, in the process that the second end 1312 of at least one elastic piece 131 is released and drives each of the remaining elastic pieces 131 one by one to drive the corresponding heat-melting member 12 to open the corresponding through hole 111, through such a setting, the heat-melting members 12 having cavities 134 are quickly linked and the corresponding through holes 111 are opened, so that the salt powder in the cavities 134 is released and dissolved in the coolant, thereby realizing the rapid transformation of the coolant into a salt solution.

[0076] Specifically, when the liquid cooling plate 1 is applied to the battery pack 1000 and the battery pack 1000 has a thermal runaway, due to there being a plurality of heat-melting members 12 having cavities 134 and they are evenly spaced along the circumferential direction of the plate body 11, the heat-melting members 12 having cavities 134 are quickly linked and the corresponding through holes 111 are opened, so that the salt powder in the cavities 134 is released and dissolved in the coolant, thereby realizing the transformation of the coolant into a salt solution in the initial stage of the thermal runaway of the battery pack 1000, and further releasing the electric energy of the battery pack 1000 to further improve safety.

[0077] Furthermore, as Figure 11 shown, the plate body 11 is square, and the heat-melting member 12 having a cavity 134 (as Figure 11The first hot melt members 12a shown in the figure are four and are respectively arranged at four diagonal positions of the liquid cooling plate 1. The hot melt members 12 (such as Figure 11 The second hot melt member 12b) shown is evenly spaced along the circumferential direction of the plate body 11. Thus, through such an arrangement, at the early stage of thermal runaway of the battery pack 1000, the hot melt member 12 with the cavity 134 is driven by the linkage mechanism 13 to open the corresponding through hole 111 and the cavity 134, and the processing and production of the liquid cooling plate 1 is facilitated.

[0078] In some embodiments of the present invention, Figure 6 As shown, the linkage mechanism 13 further includes a plurality of steel cables 132. The second end 1312 of each spring piece 131 is connected to the hot melt piece 12 via a steel cable 132. Thus, in the process that the spring piece 131 is driven to drive the hot melt piece 12 to open the through hole 111, the driving force received by the spring piece 131 is transmitted to the hot melt piece 12 via the steel cable 132 to open the through hole 111. The provision of the steel cable 132 enhances the reliability of the connection between the spring piece 131 and the hot melt piece 12 and the force transmission process.

[0079] In some embodiments of the present invention, Figure 11 and Figure 13 As shown, at least one surface in the thickness direction of the hot melt component 12 has an annular groove 121 extending along the circumferential direction of the hot melt component 12, and the annular groove 121 is opposite to the cavity 134. The annular groove 121 divides the hot melt component 12 into a movable part 122 and a fixed part 123 located outside the movable part 122, and the linkage mechanism 13 is connected to the movable part 122.

[0080] It can be understood that the hot melt 12 has an annular groove 121 extending in the circumferential direction of the hot melt 12 on the surface facing the accommodating cavity 112, or the hot melt 12 has an annular groove 121 extending in the circumferential direction of the hot melt 12 on the surface facing away from the accommodating cavity 112, or the hot melt 12 has an annular groove 121 extending in the circumferential direction of the hot melt 12 on the surfaces facing and away from the accommodating cavity 112. When the temperature of the environment where the liquid cold plate 1 is located is lower than the melting point of the hot melt 12, the moving part 122 is connected to the fixed part 123, the hot melt 12 blocks the through hole 111, and the liquid cold plate 1 cools down the device attached thereto.

[0081] When the temperature of the environment where some of the plurality of hot-melt parts 12 on the liquid cooling plate 1 gradually rises to be greater than or equal to the melting point of the hot-melt parts 12, these part of the hot-melt parts 12 are melted, so that the linkage mechanism 13 is released and drives the moving parts 122 of the remaining at least part of the hot-melt parts 12 to separate from the fixed parts 123, thereby realizing that the hot-melt parts 12 open the corresponding through holes 111, so that the coolant in the accommodation cavity 112 flows out from the opened through holes 111 to the device attached to the liquid cooling plate 1. At the same time, when the moving part 122 of the hot-melt part 12 with the cavity 134 separates from the fixed part 123, the cavity 134 is opened, so that the salt powder located in the cavity 134 is released and dissolved in the coolant, thereby turning the coolant into a salt solution, further ensuring the cooling effect.

[0082] Thus, during the process that the linkage mechanism 13 is released and drives the moving parts 122 of the remaining at least part of the hot-melt parts 12 to separate from the fixed parts 123, the arrangement of the annular groove 121 makes the connection between the moving part 122 and the fixed part 123 relatively weak, which is convenient for the linkage mechanism 13 to drive the moving part 122 to separate from the fixed part 123, improving the reliability of the liquid cooling plate 1.

[0083] Furthermore, as Figure 8 、 Figure 10 、 Figure 11 and Figure 13 shown, the linkage mechanism 13 includes a plurality of elastic pieces 131. Among them, the plurality of elastic pieces 131 correspond to the plurality of through holes 111 one by one. The two ends of each elastic piece 131 in the length direction are respectively a first end 1311 and a second end 1312. The first end 1311 is connected to the inner wall of the accommodation cavity 112, and the second end 1312 is connected to the moving part 122 of the corresponding hot-melt part 12. When the elastic piece 131 is connected to the hot-melt part 12 and all the hot-melt parts 12 are located in the through holes 111, the second end 1312 has a tendency to move in the direction from the end of the moving part 122 connected to the elastic piece 131 to the other end. The plurality of elastic pieces 131 are arranged in sequence. After the second end 1312 of one of the elastic pieces 131 is released, it moves towards the next elastic piece 131 and contacts the next elastic piece 131 to drive the next elastic piece 131 to drive the corresponding moving part 122 to separate from the fixed part 123, thereby realizing that the hot-melt part 12 opens the corresponding through hole 111. Thus, the arrangement of the annular groove 121 is convenient for the second end 1312 to drive the moving part 122 to separate from the fixed part 123 to realize opening the through hole 111.

[0084] In some embodiments of the present invention, as Figure 6 and Figure 13As shown in the figure, there is a protrusion 1221 on the peripheral wall of the moving part 122, and a notch 1231 that cooperates with the protrusion 1221 on the inner peripheral wall of the fixed part 123. The linkage mechanism 13 is connected to the protrusion 1221. Thus, when the temperature of the environment where some of the plurality of hot melt parts 12 on the liquid cooling plate 1 gradually rises to be greater than or equal to the melting point of the hot melt part 12, this part of the hot melt part 12 is melted, so that the linkage mechanism 13 is released and drives the protrusions 1221 of at least some of the remaining hot melt parts 12 to separate from the fixed part 123, thereby driving the moving part 122 to separate from the fixed part 123, and further realizing that the hot melt part 12 opens the corresponding through hole 111, so that the coolant in the accommodating cavity 112 flows out from the opened through hole 111, thereby realizing the rapid cooling of the device attached to the liquid cooling plate 1. At the same time, the setting of the protrusion 1221 facilitates the linkage mechanism 13 to drive the moving part 122 of the hot melt part 12 to separate from the fixed part 123 to open the corresponding through hole 111, improving the reliability of the liquid cooling plate 1.

[0085] Further, as Figure 6 , Figure 8 , Figure 10 , Figure 11 and Figure 13 shown, the linkage mechanism 13 includes a plurality of elastic pieces 131 and a plurality of steel cables 132. Among them, the plurality of elastic pieces 131 correspond to the plurality of through holes 111 one by one. The two ends of each elastic piece 131 in the length direction are respectively a first end 1311 and a second end 1312. The first end 1311 is connected to the inner wall of the accommodating cavity 112, and the second end 1312 is connected to the protrusion 1221 of the hot melt part 12 through a steel cable 132. When the elastic piece 131 is in a connected state with the hot melt part 12 and all the hot melt parts 12 are located in the through hole 111, the second end 1312 has a tendency to move from the protrusion 1221 of the moving part 122 to the end far from the protrusion 1221. The plurality of elastic pieces 131 are arranged in sequence. After the second end 1312 of one of the elastic pieces 131 is released, it moves towards the next elastic piece 131 and contacts the next elastic piece 131 to drive the next elastic piece 131 to drive the corresponding protrusion 1221 to separate from the fixed part 123, thereby driving the moving part 122 to separate from the fixed part 123, and further realizing that the hot melt part 12 opens the corresponding through hole 111.

[0086] In some embodiments of the present invention, as Figure 11 shown, the size of the through hole 111 where the hot melt part 12 (such as the first hot melt part 12a shown in Figure 11 ) having a cavity 134 is located is larger than the size of the through hole 111 where the hot melt part 12 (such as the second hot melt part 12b shown in Figure 11 ) not having a cavity 134 is located. Thus, through such a setting, it is convenient for the release of the salt powder filled in the cavity 134, ensuring that the salt powder dissolves into the coolant to form a salt solution, and further improving the reliability of the liquid cooling plate 1.

[0087] Further, as Figure 10 shown, the through hole 111 is a circular through hole. Thus, such a setting facilitates the opening of the through hole 111 on the plate body 11, reduces the process difficulty and production cost, and improves the production efficiency of the liquid cooling plate 1. Further, the hot melt part 12 is of a circular structure, so as to facilitate the hot melt part 12 to block the through hole 111.

[0088] In some embodiments of the present invention, as Figure 4 and Figure 12 shown, a plurality of through holes 111 are provided on the same surface of the plate body 11. Thus, through such a setting, when the linkage mechanism 13 is released and drives the remaining at least part of the hot melt parts 12 to open the corresponding through holes 111 on the same surface, the coolant in the accommodation cavity 112 flows out from the same direction, further ensuring the outflow speed of the coolant and realizing rapid cooling.

[0089] In some embodiments of the present invention, the hot melt part 12 is an ABS (Acrylonitrile butadiene Styrenecopolymers) part. It can be understood that since ABS has good comprehensive physical and mechanical properties at normal temperature and is wear-resistant, chemically corrosion-resistant, and corrosion-resistant, when the liquid cooling plate 1 is in a normal temperature environment, the hot melt part 12 is used to block the through hole 111 and is connected to the linkage mechanism 13; when the ambient temperature of the liquid cooling plate 1 reaches the melting point of ABS, the hot melt part 12 melts due to heat to open the corresponding through hole 111, and the linkage drive connected thereto is released and drives the remaining at least part of the hot melt parts 12 to open the corresponding through holes 111 at least in part, so as to ensure the reliability of the liquid cooling plate 1.

[0090] For example, when the liquid cooling plate 1 is applied to the battery pack 1000, when the battery pack 1000 is operating normally, the environment where the liquid cooling plate 1 is located is lower than the melting point of ABS, the hot melt part 12 is used to block the through hole 111, and the liquid cooling plate 1 cools the battery pack 1000 to realize the heat dissipation of the battery pack 1000 and ensure the performance of the battery pack 1000. When an abnormal condition occurs inside the battery pack 1000, for example, when the battery pack 1000 has a thermal runaway, when the released high-temperature flue gas and other ejected gases reach the melting point of ABS, the hot melt part 12 melts due to heat to open the through hole 111, and the coolant in the accommodation cavity 112 flows out from the opened through hole 111, and rapidly cools the battery pack 1000 by means of evaporation heat transfer, flow heat transfer, etc.

[0091] It should be noted that the hot melt part 12 can also be made of a hot melt material that is in a fixed state at normal temperature and has a melting point of about 200°.

[0092] Next, the liquid cooling system 100 according to the embodiments of the present invention will be described.

[0093] According to the liquid cooling system 100 of an embodiment of the present invention, as Figure 2 shown, the liquid cooling system 100 includes the above-mentioned liquid cooling plate 1.

[0094] According to the liquid cooling system 100 of an embodiment of the present invention, the liquid cooling plate 1 is provided. An accommodation cavity 112 for accommodating a coolant is provided in the plate body 11. Through holes 111 communicating with the accommodation cavity 112 are provided on the outer surface of the plate body 11. The through holes 111 are multiple and spaced apart. A heat-melting member 12 is provided in each through hole 111 for blocking the through hole 111. When the temperature of the environment where some of the heat-melting members 12 among the multiple heat-melting members 12 on the liquid cooling plate 1 gradually rises to be greater than or equal to the melting point of the heat-melting member 12, this part of the heat-melting member 12 is melted, so that the through hole 111 corresponding to the melted heat-melting member 12 is opened, and the coolant in the accommodation cavity 112 flows out from the opened through hole 111, thereby achieving rapid cooling and temperature reduction. And at least part of the heat-melting member 12 has a cavity 134, and salt powder is filled in the cavity 134, so that the salt powder in the cavity 134 is released and dissolved in the coolant after the heat-melting member 12 having the cavity 134 and filled with salt powder is heated and melted, so that the coolant is turned into a salt solution, further ensuring the cooling and temperature reduction effect. At the same time, when the liquid cooling plate 1 is applied to the battery pack 1000, by turning the coolant into a salt solution, the battery pack 1000 is soaked in the salt solution and slowly releases electric energy until the power is drained, thereby completely blocking the possibility of the battery pack reigniting..

[0095] In some embodiments of the present invention, as Figure 3 and Figure 4 shown, there are multiple liquid cooling plates 1. The liquid cooling system 100 further includes a cooling pipeline 2. The cooling pipeline 2 includes a connecting pipeline 21, a liquid inlet pipe 22 and a liquid outlet pipe 23. An inlet port 113 and an outlet port 114 communicating with the accommodation cavity 112 are provided on the plate body 11 of each liquid cooling plate 1. The multiple liquid cooling plates 1 are connected in series through the connecting pipeline 21. Along the flowing direction of the coolant, the inlet port 113 of the liquid cooling plate 1 located at the most upstream end is connected with the liquid inlet pipe 22, and the outlet port 114 of the liquid cooling plate 1 located at the most downstream end is connected with the liquid outlet pipe 23. Thus, the coolant enters the liquid cooling system 100 through the liquid inlet pipe 22, and sequentially enters the corresponding accommodation cavity 112 through the inlet port 113 of each liquid cooling plate 1, and flows into the connecting pipeline 21 through the outlet port 114 of each liquid cooling plate 1, until the coolant flows out from the outlet port 114 of the liquid cooling plate 1 located at the most upstream end to the liquid outlet pipe 23, thereby realizing the circulating flow of the coolant in the liquid cooling system 100, and further ensuring the cooling and temperature reduction effect of the liquid cooling system 100.

[0096] Further, there are multiple liquid inlets 113 and multiple liquid outlets 114. The arrangement of the multiple liquid inlets 113 and the multiple liquid outlets 114 ensures the flow rate of the coolant between the liquid inlet pipe 22 and the liquid cooling plate 1, between the liquid cooling plate 1 and the connecting pipe 21, and between the liquid cooling plate 1 and the liquid outlet pipe 23, further improving the cooling effect of the liquid cooling system 100.

[0097] The battery pack 1000 according to an embodiment of the present invention will be described below.

[0098] The liquid cooling system 100 according to an embodiment of the present invention, as Figure 1 shown, the battery pack 1000 includes a housing 200, a battery module 300, and the above-mentioned liquid cooling system 100. Among them, the battery module 300 is arranged in the housing 200, and the liquid cooling plate 1 is arranged in the housing 200 and is attached to the battery module 300. It can be understood that when the battery module 300 is working normally, the heat of the battery module 300 is taken away by the coolant flowing in the accommodation cavity 112 of the liquid cooling plate 1, thereby realizing the cooling of the battery module 300 by the liquid cooling system 100 and ensuring the performance of the battery pack 1000.

[0099] When an abnormal condition occurs in the battery module 300, for example, when the battery pack 1000 undergoes thermal runaway, the ejected gas such as high-temperature flue gas released melts part of the heat-melting part 12, so that the through hole 111 corresponding to the melted heat-melting part 12 is opened, and the coolant in the accommodation cavity 112 flows out from the opened through hole 111, and quickly cools down the battery pack 1000 by means of evaporation heat transfer, flow heat transfer, etc., delaying the heat spread rate of the battery pack 1000, reducing the possibility of the flame directly breaking through the outer shell of the battery pack 1000 and exploding, and improving the safety of the battery pack 1000 using the liquid cooling plate 1. At the same time, when the heat-melting part 12 with a cavity 134 filled with salt powder melts when heated, the salt powder in the cavity 134 is released and dissolved in the coolant, so that the coolant is transformed into a salt solution, so that the battery pack 1000 is soaked in the salt solution and slowly discharges electricity until the power is exhausted, completely blocking the possibility of the battery pack 1000 reigniting and further improving safety.

[0100] According to the liquid cooling system 100 of an embodiment of the present invention, the liquid cooling system 100 is provided. The plate body 11 has a receiving cavity 112 for receiving a coolant. The outer surface of the plate body 11 has through holes 111 communicating with the receiving cavity 112. The through holes 111 are multiple and spaced apart. Each through hole 111 is provided with a heat-melting member 12 for blocking the through hole 111. When the temperature of the environment where some of the heat-melting members 12 among the multiple heat-melting members 12 on the liquid cooling plate 1 gradually rises to be greater than or equal to the melting point of the heat-melting member 12, this part of the heat-melting members 12 is melted, so that the through holes 111 corresponding to the melted heat-melting members 12 are opened, and the coolant located in the receiving cavity 112 flows out from the opened through holes 111, thereby achieving rapid cooling. And at least part of the heat-melting members 12 have cavities 134, and the cavities 134 are filled with salt powder, so that the salt powder located in the cavities 134 is released and dissolved in the coolant after the heat-melting members 12 having cavities 134 and filled with salt powder are heated and melted, so that the coolant is transformed into a salt solution, and the battery pack 1000 is soaked in the salt solution to slowly release electric energy until the power is drained, completely blocking the possibility of the battery pack 1000 reigniting and further improving safety.

[0101] In some embodiments of the present invention, as Figure 14 shown, the battery pack 1000 further includes a partition assembly 400. Among them, the partition assembly 400 is arranged in the housing 200 to divide the space in the housing 200 into multiple spaced-apart sub-spaces 500. The battery module 300 includes multiple sub-modules 301, and the multiple sub-modules 301 are respectively arranged in the multiple sub-spaces 500. There are multiple liquid cooling plates 1, and the multiple liquid cooling plates 1 are respectively arranged in the multiple sub-spaces 500 and are attached to the corresponding sub-modules 301.

[0102] Thus, when any one of the sub-modules 301 has a thermal runaway, since each sub-module 301 is respectively arranged in the multiple sub-spaces 500, the coolant only fills the sub-space 500 where the sub-module 301 having the thermal runaway is located and will not flow to other sub-spaces 500, thereby realizing that the coolant quickly soaks the entire sub-module 301, and while achieving rapid cooling, it will not affect other sub-modules 301.

[0103] Furthermore, the sub-module 301 includes multiple battery cells 3011, end plates 3012, and a circular tie 3013. The multiple battery cells 3011 are arranged in sequence along the length direction of the sub-module 301. The end plates 3012 are arranged at one end of the multiple battery cells 3011 along the length direction of the sub-module 301. The circular tie 3013 surrounds the end plates 3012 and the multiple battery cells 3011 along the circumferential direction of the sub-module 301. Thus, through such an arrangement, the fixation of the multiple battery cells 3011 is realized, thereby improving the reliability of the sub-module 301.

[0104] In some embodiments of the present invention, as Figure 1 、Figure 2 and Figure 14 As shown in Figure 14 , the liquid cooling plate 1 is provided at the side of the sub-module 301, and the through holes 111 are provided on the surface of the plate body 11 facing the sub-module 301. Thus, when the sub-module 301 undergoes thermal runaway, the coolant flows out from the opened through holes 111 and directly sprays onto the sub-module 301, thereby increasing the speed of evaporation heat transfer, flow heat transfer, etc. between the coolant and the sub-module 301, and further achieving rapid cooling of the sub-module 301, reducing the speed of heat spread, and improving the reliability of the battery pack 1000.

[0105] It should be noted that the installation position of the liquid cooling plate 1 is not limited to this. According to different requirements of the battery pack 1000, the liquid cooling plate 1 can also be provided above or below the sub-module 301.

[0106] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0107] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A liquid cooling plate, characterized in that, Comprising: A plate body, which has a receiving cavity for receiving a coolant therein, and through holes communicating with the receiving cavity are provided on the outer surface of the plate body, and the through holes are multiple and spaced apart; Hot melt members, each of the through holes is provided with a hot melt member for plugging the through hole, and at least part of the hot melt members have cavities therein, and salt powder is filled in the cavities; A linkage mechanism, which is arranged in the receiving cavity, the linkage mechanism is connected to each of the hot melt members, and the linkage mechanism is configured to be released and drive at least part of the remaining hot melt members to open the corresponding through holes when at least one of the hot melt members melts. The linkage mechanism includes: Multiple elastic pieces, the two ends of each elastic piece in the length direction are respectively a first end and a second end, the first end is connected to the plate body, and the second end is connected to the corresponding hot melt member. After the second end of one of the elastic pieces is released, it moves towards the next elastic piece and contacts the next elastic piece to drive the next elastic piece to drive the corresponding hot melt member to open the corresponding through hole.

2. The liquid cooling plate according to claim 1, wherein, The salt powder is CuCl2 or CuSo4.

3. The liquid cooling plate according to claim 1, wherein After the hot melt member having the cavity opens the through hole, the cavity is opened.

4. The liquid cooling plate according to claim 3, wherein The multiple elastic pieces correspond to the multiple through holes one by one. When the elastic pieces are in a connected state with the hot melt members and all the hot melt members are located in the through holes, the second end has a tendency to move away from the hot melt member, and the multiple elastic pieces are arranged in sequence.

5. The liquid cooling plate according to claim 4, wherein, The multiple through holes are spaced apart along the circumferential direction of the plate body, and the multiple elastic pieces are spaced apart along the circumferential direction of the plate body.

6. The liquid cooling plate according to claim 5, characterized in that, The hot melt members having the cavities are multiple and are evenly spaced along the circumferential direction of the plate body.

7. The liquid cooling plate according to claim 4, wherein, The linkage mechanism further includes: Multiple steel cables, and the second end of each elastic piece is connected to the hot melt member through a steel cable.

8. The liquid cooling plate according to claim 3, characterized in that, At least one surface in the thickness direction of the hot melt member has an annular groove extending along the circumferential direction of the hot melt member, the annular groove is opposite to the cavity, and the annular groove divides the hot melt member into a moving part and a fixed part located outside the moving part, and the linkage mechanism is connected to the moving part.

9. The liquid cooling plate according to claim 8, wherein Protrusions are provided on the peripheral wall of the moving part, and notches matching the protrusions are provided on the inner peripheral wall of the fixed part, and the linkage mechanism is connected to the protrusions.

10. The liquid cooling plate according to claim 1, wherein, The size of the through hole where the hot melt member having the cavity is located is larger than the size of the through hole where the hot melt member without the cavity is located.

11. The liquid cooling plate according to claim 1, wherein The hot melt member is an ABS member.

12. A liquid cooling system, characterized in that, Including the liquid cooling plate according to any one of claims 1-11.

13. A battery pack, characterized in that, Including: A housing; A battery module, and the battery module is arranged in the housing; The liquid cooling system according to claim 12, and the liquid cooling plate is arranged in the housing and is attached to the battery module.

14. The battery pack according to claim 13, characterized in that, Further including: A partition assembly, the partition assembly is disposed in the housing to divide the space in the housing into a plurality of spaced-apart sub-spaces, the battery module includes a plurality of sub-modules, and the plurality of sub-modules are respectively disposed in the plurality of sub-spaces. There are a plurality of liquid cooling plates, and the plurality of liquid cooling plates are respectively disposed in the plurality of sub-spaces and are attached to the corresponding sub-modules.

15. The battery pack according to claim 14, wherein, The liquid cooling plate is disposed on the side of the sub-module, and the through hole is disposed on the surface of the plate body facing the sub-module.

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