Liquid cooling system, battery pack and electric device

Abstract

The utility model discloses a liquid cooling system, a battery pack and an electric device, the liquid cooling system is used for cooling a heating body, the heating body is composed of a plurality of columns of heating units arranged in an array, the liquid cooling system comprises a liquid cooling bottom plate and a liquid cooling assembly, and the liquid cooling bottom plate is arranged on one side of the heating body along the Z direction; the liquid cooling assembly comprises a first liquid cooling piece and a second liquid cooling piece which are communicated with each other; the first liquid cooling pieces are arranged on the two sides of the heating body in the X direction respectively, and at least part of the first liquid cooling pieces are bent and extend to the side, away from the liquid cooling bottom plate, of part of the heating body; the second liquid cooling piece is located between the two first liquid cooling pieces and arranged between the two adjacent columns of heating units, and at least part of the second liquid cooling piece is bent and extends to the side, away from the liquid cooling bottom plate, of part of the heating body. The liquid cooling system mainly solves the problems that an existing liquid cooling system is low in cell cooling efficiency and poor in cooling uniformity.

Description

Technical Field

[0001] This utility model relates to the technical field of liquid cooling systems, and in particular to a liquid cooling system, a battery pack, and an electrical device. Background Technology

[0002] In the current power battery industry, the fast charging industry is developing rapidly. When the battery cells are fast charging, heat is generated, which causes the battery pack temperature to rise. Existing battery packs are equipped with a liquid cooling system. Currently, most of the liquid cooling systems in battery packs are designed to cool only the bottom or top surface of the battery cells, or only the sides of the battery cells. These single-sided liquid cooling designs are no longer able to meet the current requirements of battery cells for fast charging. Moreover, the single-sided liquid cooling structure leads to uneven heat dissipation of the battery cells due to insufficient cooling area. Therefore, there is an urgent need to improve the performance of the liquid cooling system in dissipating heat from the battery cells and improve the uniformity of heat dissipation.

[0003] Therefore, improvements to existing technologies are necessary. Utility Model Content

[0004] This utility model provides a liquid cooling system, a battery pack, and an electrical device, mainly solving the technical problems of low cooling efficiency and poor cooling uniformity of existing liquid cooling systems for battery cells.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A liquid cooling system for cooling a heating element, the heating element being composed of multiple rows of heating units arranged in an array, the liquid cooling system comprising:

[0007] A liquid-cooled base plate is disposed on one side of the heating element along the Z direction, wherein the Z direction is the height direction of the heating unit;

[0008] A liquid cooling assembly includes a first liquid cooling component and a second liquid cooling component that are connected to each other; the first liquid cooling component is respectively disposed on both sides of the heating element along the X direction, and at least a portion of the first liquid cooling component is bent and extends to the side of the heating element away from the liquid cooling base plate; the second liquid cooling component is located between the two first liquid cooling components and disposed between two adjacent rows of heating units, and at least a portion of the second liquid cooling component is bent and extends to the side of the heating element away from the liquid cooling base plate, wherein the X direction is the width direction of the heating unit.

[0009] In one of the technical solutions, the first liquid cooling component is provided with a first liquid cooling channel and a second liquid cooling channel that are interconnected. The first liquid cooling channel is used to cool the side of the heating element, and the second liquid cooling channel is used to cool part of the top of the heating element.

[0010] The second liquid cooling component is provided with a third liquid cooling channel, a fourth liquid cooling channel and a fifth liquid cooling channel that are interconnected. The third liquid cooling channel is used to cool the sides of two adjacent heating units, and the fourth liquid cooling channel and the fifth liquid cooling channel are respectively used to cool the top of part of the heating element.

[0011] In one of the technical solutions, the first liquid cooling component adopts an L-shaped structure. The first liquid cooling component includes a first plate portion and a second plate portion connected at an angle to the first plate portion. The first plate portion extends along the Z direction, and the second plate portion extends along the X direction. The first liquid cooling channel is disposed in the first plate portion, and the second liquid cooling channel is disposed in the second plate portion.

[0012] The second liquid cooling component adopts a T-shaped structure. The second liquid cooling component includes a third plate portion and a fourth plate portion and a fifth plate portion connected at an angle to the third plate portion. The third plate portion extends along the Z direction, and the fourth plate portion and the fifth plate portion both extend relative to each other along the X direction. The third liquid cooling channel is disposed in the third plate portion, the fourth liquid cooling channel is disposed in the fourth plate portion, and the fifth liquid cooling channel is disposed in the fifth plate portion.

[0013] In one of the technical solutions, a first current collector is provided at one end of the first liquid cooling component along the Y direction, and a second current collector is provided at the other end. One of the first current collector and the second current collector is connected to the first liquid cooling channel, and the other is connected to the second liquid cooling channel. The Y direction is the length direction of the heating unit.

[0014] The second liquid cooling component has a third manifold at one end along the Y direction and a fourth manifold at the other end. One of the third manifold and the fourth manifold is connected to the third liquid cooling channel, and the other is connected to the fourth liquid cooling channel or the fifth liquid cooling channel.

[0015] The liquid cooling system further includes a first connecting pipe and a second connecting pipe arranged opposite to each other along the Y direction. The first connecting pipe is connected in series with all the first current collectors and all the third current collectors, and the second connecting pipe is connected in series with all the second current collectors and all the fourth current collectors. One of the first connecting pipe and the second connecting pipe is used to allow coolant to flow in, and the other is used to allow coolant to flow out.

[0016] In one of the technical solutions, a fifth current collector is provided at one end of the first liquid cooling component along the Y direction, and a sixth current collector is provided at one end of the second liquid cooling component along the Y direction. The fifth current collector and the sixth current collector are spaced apart along the X direction and located on the same side of the heating element, wherein the Y direction is the length direction of the heating unit.

[0017] The fifth current collector is provided with an independent first chamber and a second chamber. The first chamber is connected to the first liquid cooling channel, and the second chamber is connected to the second liquid cooling channel.

[0018] The sixth collector is provided with an independent third chamber and a fourth chamber. The third chamber is connected to the third liquid cooling channel, and the fourth chamber is connected to the fourth liquid cooling channel or the fifth liquid cooling channel.

[0019] The liquid cooling system further includes a third connecting pipe and a fourth connecting pipe. The third connecting pipe is connected in series with the first chambers in all the fifth manifolds and the third chambers in all the sixth manifolds. The fourth connecting pipe is connected in series with the second chambers in all the fifth manifolds and the fourth chambers in all the sixth manifolds. One of the third connecting pipe and the fourth connecting pipe is used to allow coolant to flow in, and the other is used to allow coolant to flow out.

[0020] In one of the technical solutions, the liquid cooling system further includes a flow divider and a first liquid inlet pipe and a second liquid inlet pipe connected to the flow divider;

[0021] The diverter is used to allow coolant to flow in and to divert coolant to the first inlet pipe and the second inlet pipe. The first inlet pipe is connected to the liquid-cooled base plate, and the second inlet pipe is connected to the first liquid-cooled component and the second liquid-cooled component, respectively.

[0022] In one of the technical solutions, the liquid cooling system further includes a manifold and a first liquid outlet pipe and a second liquid outlet pipe connected to the manifold;

[0023] The first liquid outlet pipe is connected to the liquid-cooled base plate, and the second liquid outlet pipe is connected to the first liquid-cooled component and the second liquid-cooled component respectively. The collecting connector is used to collect the coolant in the first liquid outlet pipe and the coolant in the second liquid outlet pipe and allow it to flow outward.

[0024] This application also provides a battery pack, including a housing, a cell module housed in the housing, and the liquid cooling system described above. The heating unit is the cell module, and the heating element is a structure in which multiple cell modules are arranged in an array.

[0025] In one of the technical solutions, the battery cell is provided with a positive terminal and a negative terminal, both of which face to the side. The first liquid cooling component and the second liquid cooling component are both used to cool the positive terminal or the negative terminal.

[0026] This application also provides an electrical device including the battery pack described above.

[0027] Compared with the prior art, the liquid cooling system provided by this utility model has at least the following beneficial effects:

[0028] The heating element in this application takes a battery cell module as an example, i.e., the heating unit is the battery cell. The liquid cooling base plate set in this solution can cool down the bottom surface of the battery cell. The liquid cooling component set in this solution is designed to include a first liquid cooling component and a second liquid cooling component. Specifically, the first liquid cooling component is designed to be arranged at two opposite ends of the battery cell module, and the second liquid cooling component is designed to be inserted between two rows of battery cells. This achieves the purpose of cooling down the bottom, side and top surfaces of the battery cell at the same time, that is, it achieves the function of multi-sided cooling of the battery cell, thereby greatly improving the heat dissipation efficiency of the battery cell. At the same time, due to multi-sided cooling, the heat dissipation of various parts of the battery cell is more uniform. Compared with the traditional large-area liquid cooling plate with low structural strength and poor heat insulation performance, this solution has a better uniformity of heat dissipation of the battery cell, thus meeting the current use requirements of fast charging of battery cells.

[0029] Furthermore, the first and second liquid cooling components in this solution can limit the lateral position of each row of cells and prevent the cells from jumping upwards. In other words, the liquid cooling components in this solution integrate the functions of liquid cooling the cells and limiting the position of the cells in the X and Z directions. By adopting this solution, the traditional pressure strips used to limit the position of the cells can be eliminated, which is conducive to improving the heat dissipation efficiency and heat dissipation uniformity of the battery pack, while also further improving the integration of the battery pack, thereby improving the energy density of the battery pack. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of a battery pack using a first liquid cooling system, provided in an embodiment of this application.

[0032] Figure 2 for Figure 1 The diagram shown is an exploded view of the battery pack.

[0033] Figure 3 This is a schematic diagram of the structure of a battery pack using a second liquid cooling system, provided in an embodiment of this application.

[0034] Figure 4 This application provides a schematic diagram of the structure of a battery pack using a third liquid cooling system, as shown in the embodiments of the present application.

[0035] Figure 5 for Figure 4 The diagram shows an exploded view of the battery pack.

[0036] Figure 6 A schematic diagram of the internal coolant flow of the first liquid-cooled component provided in an embodiment of this application;

[0037] Figure 7 This is a schematic diagram of the internal coolant flow of the second liquid-cooled component provided in an embodiment of this application.

[0038] Figure label:

[0039] 1. Housing; 2. Heating element; 21. Heating unit; 211. Positive terminal; 212. Negative terminal;

[0040] 3. Liquid cooling system; 31. Liquid cooling base plate; 32. Liquid cooling assembly; 321. First liquid cooling component; 3211. First liquid cooling channel; 3212. Second liquid cooling channel; 3213. First plate section; 3214. Second plate section; 322. Second liquid cooling component; 3221. Third liquid cooling channel; 3222. Fourth liquid cooling channel; 3223. Fifth liquid cooling channel; 3224. Third plate section; 3225. Fourth plate section; 3226. Fifth plate section; 323. First manifold; 324. Second manifold; 325. Third manifold; 326. Fourth manifold; 327. Fifth manifold; 328. Sixth manifold; 33. First connecting pipe; 34. Second connecting pipe; 35. Third connecting pipe; 36. Fourth connecting pipe;

[0041] 301. Diverter; 302. First inlet pipe; 303. Second inlet pipe; 304. Merging connector; 305. First outlet pipe; 306. Second outlet pipe. Detailed Implementation

[0042] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0043] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0044] It should be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0046] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0047] Please refer to the following: Figure 1 , Figure 2 , Figure 6 and Figure 7This utility model embodiment provides a liquid cooling system for cooling a heating element 2. The heating element 2 consists of multiple rows of heating units 21 arranged in an array. The liquid cooling system mainly includes a liquid cooling base plate 31 and a liquid cooling assembly 32. The liquid cooling base plate 31 is disposed on the bottom side of the heating element 2 along the Z direction (the Z direction can be understood as the height direction of the heating unit 21). The liquid cooling assembly 32 specifically includes a first liquid cooling component 321 and a second liquid cooling component 322 that are connected to each other. The heating element 2 is cooled in the X direction (the X direction can be understood as the height direction of the heating unit 21). First liquid cooling components 321 are provided on both sides of the heating unit 21 (in the width direction), and at least a portion of the first liquid cooling components 321 bends and extends to the side of the heating element 2 away from the liquid cooling base plate 31 (which can be understood as the first liquid cooling component 321 bending and extending to the top of the heating element 2). A second liquid cooling component 322 is provided between every two rows of heating units 21, and at least a portion of the second liquid cooling component 322 bends and extends to the side of the heating element 2 away from the liquid cooling base plate 31 (which can be understood as the second liquid cooling component 322 bending and extending to the top of the heating element 2). Specifically, the first liquid cooling component 321 is provided with a first liquid cooling channel 3211 and a second liquid cooling channel 3212 that are interconnected. The first liquid cooling channel 3211 is used to cool the side of the heating element 2, and the second liquid cooling channel 3212 is used to cool the top of the heating element 2. The second liquid cooling component 322 is provided with interconnected third liquid cooling channels 3221, fourth liquid cooling channels 3222, and fifth liquid cooling channels 3223. The third liquid cooling channel 3221 is used to cool the sides of two adjacent heating units 21, and the fourth and fifth liquid cooling channels 3222 and 3223 are used to cool the tops of the heating elements 2, respectively. Preferably, the first liquid cooling component 321 adopts an L-shaped structure, and the second liquid cooling component 322 adopts a T-shaped structure.

[0048] In this embodiment, the heating element of this application takes a battery cell module as an example, that is, the heating unit is the battery cell. The liquid cooling base plate 31 provided in this solution can cool down the bottom surface of the battery cell. The liquid cooling component 32 provided in this solution is designed to include a first liquid cooling component 321 and a second liquid cooling component 322. Specifically, the first liquid cooling component 321 is designed to be arranged at two opposite ends of the battery cell module, and the second liquid cooling component 322 is designed to be inserted between two rows of battery cells. This achieves the purpose of cooling down the bottom, side and top surfaces of the battery cell at the same time. That is, it achieves the function of multi-sided cooling of the battery cell, thereby greatly improving the heat dissipation efficiency of the battery cell. At the same time, due to multi-sided cooling, the heat dissipation of various parts of the battery cell is more uniform. Compared with the traditional large-area liquid cooling plate with poor thermal insulation performance due to low structural strength, this solution has a better uniformity of heat dissipation of the battery cell, thereby meeting the current use requirements of fast charging of battery cells. Furthermore, the first liquid cooling component 321 and the second liquid cooling component 322 provided in this solution can limit the lateral position of each row of cells and prevent the cells from jumping upwards. In other words, the liquid cooling component 32 of this solution integrates the functions of liquid cooling of the cells and limiting the position of the cells in the X and Z directions. By adopting this solution, the traditional pressure bar used to limit the position of the cells can be eliminated, which is conducive to improving the heat dissipation efficiency and heat dissipation uniformity of the battery pack, while also further improving the integration of the battery pack, thereby improving the energy density of the battery pack.

[0049] Please refer to them again. Figure 6 and Figure 7 In fact, the first liquid cooling component 321 includes a first plate portion 3213 and a second plate portion 3214 connected to the first plate portion 3213 at an angle. The first plate portion 3213 extends along the Z direction, and the second plate portion 3214 extends along the X direction. A first liquid cooling channel 3211 is disposed within the first plate portion 3213, and a second liquid cooling channel 3212 is disposed within the second plate portion 3214. In fact, the second liquid cooling component 322 includes a third plate portion 3224 and a fourth plate portion 3225 and a fifth plate portion 3226 connected to the third plate portion 3224 at an angle. The third plate portion 3224 extends along the Z direction, and the fourth plate portion 3225 and the fifth plate portion 3226 both extend relative to each other along the X direction. A third liquid cooling channel 3221 is disposed within the third plate portion 3224, a fourth liquid cooling channel 3222 is disposed within the fourth plate portion 3225, and a fifth liquid cooling channel 3223 is disposed within the fifth plate portion 3226.

[0050] Please refer to the following: Figure 1 , Figure 2 , Figure 6 and Figure 7The first liquid cooling component 321 has a first current collector 323 at one end along the Y direction (the Y direction can be understood as the length direction of the heating unit 21), and a second current collector 324 at the other end. One of the first current collector 323 and the second current collector 324 is connected to the first liquid cooling channel 3211, and the other is connected to the second liquid cooling channel 3212. The second liquid cooling component 322 has a third current collector 325 at one end along the Y direction, and a fourth current collector 326 at the other end. One of the third current collector 325 and the fourth current collector 326 is connected to the third liquid cooling channel 3221, and the other is connected to the fourth liquid cooling channel 3222 or the fifth liquid cooling channel 3223. In addition, the liquid cooling system also includes a first connecting pipe 33 and a second connecting pipe 34 arranged opposite to each other along the Y direction. The first connecting pipe 33 is connected in series with all the first collectors 323 and all the third collectors 325, and the second connecting pipe 34 is connected in series with all the second collectors 324 and all the fourth collectors 326. One of the first connecting pipe 33 and the second connecting pipe 34 is used to allow coolant to flow in, and the other is used to allow coolant to flow out. Specifically, when coolant flows in from the first connecting pipe 33, it flows from each of the first manifolds 323 into the first liquid cooling element 321 and from the third manifold 325 into each of the second liquid cooling elements 322. The coolant in the first liquid cooling element 321 flows out from the second manifold 324 into the second connecting pipe 34, and the coolant in the second liquid cooling element 322 flows out from the fourth manifold 326 into the second connecting pipe 34. The coolant in the second connecting pipe 34 flows outward and back into the first connecting pipe 33, achieving a circulating flow of coolant. This design allows for the simple structural implementation of coolant flow through all the first liquid cooling elements 321 and all the second liquid cooling elements 322. In this embodiment, the first connecting pipe 33 is preferably used for liquid inlet, and the corresponding second connecting pipe 34 is used for liquid outlet. Specifically… Figure 1 , Figure 2 , Figure 6 and Figure 7 The first current collector 323 shown is connected to the second liquid cooling channel 3212 in the corresponding first liquid cooling component 321. Figure 1 , Figure 2 , Figure 6 and Figure 7 The second current collector 324 shown is connected to the first liquid cooling channel 3211 in the corresponding first liquid cooling component 321. Figure 1 , Figure 2 , Figure 6 and Figure 7 The third current collector 325 shown is connected to the fourth liquid cooling channel 3222 or the fifth liquid cooling channel 3223 of the corresponding second liquid cooling component 322. Figure 1 , Figure 2 , Figure 6 and Figure 7The fourth current collector 326 shown is connected to the third liquid cooling channel 3221 of the corresponding second liquid cooling component 322, that is, Figure 1 , Figure 2 , Figure 6 and Figure 7 The liquid cooling system shown can also be understood as having coolant flowing from top to bottom on both sides. In another embodiment, the coolant can also be as follows: Figure 3 As shown, the flow enters from below and exits from above on both sides.

[0051] Please refer to the following: Figure 4 and Figure 5 The first liquid cooling component 321 has a fifth current collector 327 at one end along the Y direction, and the second liquid cooling component 322 has a sixth current collector 328 at one end along the Y direction. The fifth current collector 327 and the sixth current collector 328 are spaced apart along the X direction and located on the same side of the heating element 2. In addition, the fifth current collector 327 has independent first and second chambers. The first chamber is connected to the first liquid cooling channel 3211, and the second chamber is connected to the second liquid cooling channel 3212. The sixth current collector 328 has independent third and fourth chambers. The third chamber is connected to the third liquid cooling channel 3221, and the fourth chamber is connected to the fourth liquid cooling channel 3222 or the fifth liquid cooling channel 3223. In addition, the liquid cooling system also includes a third connecting pipe 35 and a fourth connecting pipe 36. The third connecting pipe 35 connects in series with the first chambers in all the fifth manifolds 327 and the third chambers in all the sixth manifolds 328; the fourth connecting pipe 36 connects in series with the second chambers in all the fifth manifolds 327 and the fourth chambers in all the sixth manifolds 328. One of the third connecting pipe 35 and the fourth connecting pipe 36 is used for coolant inflow, and the other is used for coolant outflow. When the third connecting pipe 35 is used for liquid inflow, the fourth connecting pipe 36 is used for liquid outflow, and the coolant flows in a bottom-in, top-out manner on the same side; when the fourth connecting pipe 36 is used for liquid inflow, the third connecting pipe 35 is used for liquid outflow, and the coolant flows in a top-in, bottom-out manner on the same side. With this structural design, the third connecting pipe 35 and the fourth connecting pipe 36 can be arranged on the same side, and... Figure 1 or Figure 3 Compared to the previous structure, this solution obviously has the advantage of saving more space, which is beneficial to improving the energy density of the battery pack.

[0052] Please see Figures 1 to 5The liquid cooling system 3 in this embodiment also includes a diversion connector 301, a first liquid inlet pipe 302, a second liquid inlet pipe 303, a collection connector 304, a first liquid outlet pipe 305, and a second liquid outlet pipe 306. The first liquid inlet pipe 302 and the second liquid inlet pipe 303 are respectively connected to the diversion connector 301. The diversion connector 301 is used to allow coolant to flow in and to divert coolant to the first liquid inlet pipe 302 and the second liquid inlet pipe 303. The first liquid inlet pipe 302 is connected to the liquid cooling base plate 31. The second liquid inlet pipe 303 is connected to the first liquid cooling component 321 and the second liquid cooling component 322 respectively by connecting the aforementioned collector. The first liquid outlet pipe 305 and the second liquid outlet pipe 306 are respectively connected to the manifold 304. The first liquid outlet pipe 305 is connected to the liquid-cooled base plate 31, and the second liquid outlet pipe 306 is connected to the first liquid-cooled component 321 and the second liquid-cooled component 322 respectively through the aforementioned collector. The manifold 304 is used to collect the coolant in the first liquid outlet pipe 305 and the coolant in the second liquid outlet pipe 306 and allow it to flow outward. With this design, the liquid-cooled base plate 31 and the liquid-cooled component 32 can be connected in parallel. When in use, only coolant needs to be pumped into the diversion joint 301 to achieve the purpose of having coolant in the liquid-cooled base plate 31, the first liquid-cooled component 321 and the second liquid-cooled component 322. This gives the liquid cooling system advantages such as simple structure and easy assembly, disassembly or maintenance.

[0053] Please refer to the following: Figure 1 and Figure 2 This utility model embodiment also provides a battery pack, which mainly includes a housing 1, a cell module and the aforementioned liquid cooling system 3. The cell module and the liquid cooling system 3 are both housed in the housing 1. The housing 1 serves to protect the internal cell module and the liquid cooling system 3. The cell module includes multiple cells arranged in multiple rows and connected in series to form a cell module with a large power capacity. The aforementioned heating unit 21 is equivalent to the cell module here, and the aforementioned heating element 2 is equivalent to the structure in which multiple cell modules are arranged in an array.

[0054] Please see Figure 2The battery cell has a positive terminal 211 and a negative terminal 212, both facing to the side. This means they can face the same side or opposite sides. The first liquid cooling component 321 and the second liquid cooling component 322 are used to cool either the positive terminal 211 or the negative terminal 212. Direct cooling of the positive and negative terminals 211 and 212 improves the cell's heat dissipation efficiency. Thermal pads can be placed between the first liquid cooling component 321 and the terminal, and between the second liquid cooling component 322 and the terminal. Compression of these thermal pads ensures that either the first liquid cooling component 321 or the second liquid cooling component 322 can simultaneously cool the terminals of multiple battery cells.

[0055] This embodiment also provides an electrical device that uses the aforementioned battery pack. The electrical device can take many forms, such as mobile phones, portable devices, laptops, electric vehicles, electric cars, ships, spacecraft, electric toys, power tools, or various household appliances. For example, spacecraft include airplanes, rockets, space shuttles, and spacecraft. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers.

[0056] The above are merely preferred embodiments of the present utility model, and only specifically describe the technical principles of the present utility model. These descriptions are only for explaining the principles of the present utility model and should not be construed as limiting the scope of protection of the present utility model in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model, as well as other specific embodiments of the present utility model that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of the present utility model.

Claims

1. A liquid cooling system for cooling a heating element (2), said heating element (2) comprising multiple rows of heating units (21) arranged in an array, characterized in that, The liquid cooling system includes: A liquid-cooled base plate (31) is disposed on one side of the heating element (2) along the Z direction, wherein the Z direction is the height direction of the heating unit (21); The liquid cooling assembly (32) includes a first liquid cooling component (321) and a second liquid cooling component (322) that are connected to each other; the first liquid cooling component (321) is respectively disposed on both sides of the heating element (2) along the X direction, and at least a portion of the first liquid cooling component (321) is bent and extended to a portion of the heating element (2) away from the liquid cooling base plate (31); the second liquid cooling component (322) is located between the two first liquid cooling components (321) and disposed between two adjacent rows of heating units (21), and at least a portion of the second liquid cooling component (322) is bent and extended to a portion of the heating element (2) away from the liquid cooling base plate (31), wherein the X direction is the width direction of the heating unit (21).

2. The liquid cooling system as described in claim 1, characterized in that, The first liquid cooling component (321) is provided with a first liquid cooling channel (3211) and a second liquid cooling channel (3212) that are interconnected. The first liquid cooling channel (3211) is used to cool the side of the heating element (2), and the second liquid cooling channel (3212) is used to cool part of the top of the heating element (2). The second liquid cooling component (322) is provided with a third liquid cooling channel (3221), a fourth liquid cooling channel (3222) and a fifth liquid cooling channel (3223) that are interconnected. The third liquid cooling channel (3221) is used to cool the sides of two adjacent heating units (21), and the fourth liquid cooling channel (3222) and the fifth liquid cooling channel (3223) are respectively used to cool the top of part of the heating element (2).

3. The liquid cooling system as described in claim 2, characterized in that, The first liquid cooling component (321) adopts an L-shaped structure. The first liquid cooling component (321) includes a first plate portion (3213) and a second plate portion (3214) connected to the first plate portion (3213) at an angle. The first plate portion (3213) extends along the Z direction, and the second plate portion (3214) extends along the X direction. The first liquid cooling channel (3211) is disposed in the first plate portion (3213), and the second liquid cooling channel (3212) is disposed in the second plate portion (3214). The second liquid cooling component (322) adopts a T-shaped structure. The second liquid cooling component (322) includes a third plate portion (3224) and a fourth plate portion (3225) and a fifth plate portion (3226) connected at an angle to the third plate portion (3224). The third plate portion (3224) extends along the Z direction, and the fourth plate portion (3225) and the fifth plate portion (3226) both extend relative to each other along the X direction. The third liquid cooling channel (3221) is disposed in the third plate portion (3224), the fourth liquid cooling channel (3222) is disposed in the fourth plate portion (3225), and the fifth liquid cooling channel (3223) is disposed in the fifth plate portion (3226).

4. The liquid cooling system as described in claim 2, characterized in that, The first liquid cooling component (321) has a first current collector (323) at one end along the Y direction and a second current collector (324) at the other end. One of the first current collector (323) and the second current collector (324) is connected to the first liquid cooling channel (3211) and the other is connected to the second liquid cooling channel (3212). The Y direction is the length direction of the heating unit (21). The second liquid cooling component (322) has a third manifold (325) at one end along the Y direction and a fourth manifold (326) at the other end. One of the third manifold (325) and the fourth manifold (326) is connected to the third liquid cooling channel (3221), and the other is connected to the fourth liquid cooling channel (3222) or the fifth liquid cooling channel (3223). The liquid cooling system further includes a first connecting pipe (33) and a second connecting pipe (34) arranged opposite to each other along the Y direction. The first connecting pipe (33) is connected in series with all the first collectors (323) and all the third collectors (325), and the second connecting pipe (34) is connected in series with all the second collectors (324) and all the fourth collectors (326). One of the first connecting pipe (33) and the second connecting pipe (34) is used to allow coolant to flow in, and the other is used to allow coolant to flow out.

5. The liquid cooling system as described in claim 2, characterized in that, The first liquid cooling component (321) has a fifth current collector (327) at one end along the Y direction, and the second liquid cooling component (322) has a sixth current collector (328) at one end along the Y direction. The fifth current collector (327) and the sixth current collector (328) are spaced apart along the X direction and located on the same side of the heating element (2). The Y direction is the length direction of the heating unit (21). The fifth current collector (327) is provided with an independent first chamber and a second chamber. The first chamber is connected to the first liquid cooling channel (3211), and the second chamber is connected to the second liquid cooling channel (3212). The sixth collector (328) is provided with an independent third chamber and a fourth chamber. The third chamber is connected to the third liquid cooling channel (3221), and the fourth chamber is connected to the fourth liquid cooling channel (3222) or the fifth liquid cooling channel (3223). The liquid cooling system further includes a third connecting pipe (35) and a fourth connecting pipe (36). The third connecting pipe (35) is connected in series with the first chambers in all the fifth manifolds (327) and the third chambers in all the sixth manifolds (328). The fourth connecting pipe (36) is connected in series with the second chambers in all the fifth manifolds (327) and the fourth chambers in all the sixth manifolds (328). One of the third connecting pipe (35) and the fourth connecting pipe (36) is used to allow coolant to flow in, and the other is used to allow coolant to flow out.

6. The liquid cooling system according to any one of claims 1 to 5, characterized in that, The liquid cooling system also includes a flow divider (301) and a first liquid inlet pipe (302) and a second liquid inlet pipe (303) connected to the flow divider (301). The diverter (301) is used to allow coolant to flow in and to divert coolant to the first inlet pipe (302) and the second inlet pipe (303). The first inlet pipe (302) is connected to the liquid cooling base plate (31), and the second inlet pipe (303) is connected to the first liquid cooling component (321) and the second liquid cooling component (322) respectively.

7. The liquid cooling system according to any one of claims 1 to 5, characterized in that, The liquid cooling system also includes a manifold (304) and a first liquid outlet pipe (305) and a second liquid outlet pipe (306) connected to the manifold (304). The first liquid outlet pipe (305) is connected to the liquid cooling base plate (31), and the second liquid outlet pipe (306) is connected to the first liquid cooling component (321) and the second liquid cooling component (322) respectively. The collecting connector (304) is used to collect the coolant in the first liquid outlet pipe (305) and the coolant in the second liquid outlet pipe (306) and let them flow outward.

8. A battery pack, characterized in that, The device includes a housing (1), a battery cell module housed within the housing (1), and a liquid cooling system (3) according to any one of claims 1 to 7. The battery cell module includes multiple battery cells, the heating unit (21) is the battery cell module, and the heating element (2) is a structure in which multiple battery cell modules are arranged in an array.

9. The battery pack as described in claim 8, characterized in that, The battery cell is provided with a positive terminal (211) and a negative terminal (212), both of which face to the side. The first liquid cooling component (321) and the second liquid cooling component (322) are used to cool the positive terminal or the negative terminal.

10. An electrical device, characterized in that, Includes the battery pack as described in any one of claims 8 or 9.

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