Cooling device, battery pack and electric equipment

Abstract

The invention provides a cooling device, a battery pack and electric equipment, and relates to the technical field of batteries. The cooling device comprises a first cold plate, a second cold plate, a flow dividing block and a flow dividing assembly, a first flow channel extending in the first direction and a second flow channel extending in the second direction are formed in the flow dividing block and communicate with each other, the first flow channel communicates with an inner flow channel of the first cold plate, and the second flow channel communicates with an inner flow channel of the second cold plate; the flow dividing block is provided with a liquid inlet pipe corresponding to the first flow channel, the flow dividing assembly is movably arranged on the flow dividing block corresponding to the second flow channel, in the moving process of the flow dividing assembly, cooling liquid in the liquid inlet pipe can flow to at least one of the first flow channel and the second flow channel, the cooling liquid can be reasonably divided, and efficiency and reasonable utilization are achieved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a cooling device, a battery pack and an electrical device. Background Art

[0002] At present, new energy vehicles have put forward higher and higher requirements on the charging rate of power batteries. The temperature rise problem of power batteries under high-rate charging and discharging conditions above 4C has attracted more and more attention. At present, the temperature rise problem of power batteries will be solved by designing multi-faceted cooling solutions. For example, a liquid cooling plate is set on the top surface of the battery for cooling, and a liquid cooling plate is also set on the side of the battery for cooling.

[0003] Currently, the coolant in the liquid cooling plates disposed on different surfaces of the battery cannot be properly diverted, resulting in unreasonable utilization of cooling efficiency. Summary of the invention

[0004] The purpose of the present application includes, for example, providing a cooling device that can reasonably divert the cooling liquid and achieve reasonable utilization of efficiency.

[0005] The purpose of this application also includes providing a battery pack that can reasonably divert the coolant to achieve reasonable utilization of efficiency.

[0006] The purpose of this application also includes providing an electrical device that can reasonably divert the coolant to achieve reasonable utilization of efficiency.

[0007] The embodiments of the present application can be implemented as follows:

[0008] An embodiment of the present application provides a cooling device, which includes a first cold plate, a second cold plate, a diverter block and a diverter assembly, wherein a first flow channel extending along a first direction and a second flow channel extending along a second direction are arranged inside the diverter block, the first flow channel is connected to the internal flow channel of the first cold plate, and the second flow channel is connected to the internal flow channel of the second cold plate, and a liquid inlet pipe corresponding to the first flow channel is arranged on the diverter block, and the diverter assembly is movably arranged on the diverter block corresponding to the second flow channel. During the movement of the diverter assembly, the coolant in the liquid inlet pipe can flow to at least one of the first flow channel and the second flow channel.

[0009] Optionally, the flow dividing block is provided with an active cavity and a connecting cavity which are interconnected, the active cavity is used for the flow dividing component to move, the connecting cavity is provided at the connection of the first flow channel and the second flow channel, and the liquid inlet pipe is connected with the connecting cavity;

[0010] The active cavity is extended along the first direction, and the flow diversion component can reciprocate in the active cavity, the connecting cavity and the first flow channel along the first direction to adjust the flow in the first flow channel and the second flow channel, and the first direction is perpendicular to the second direction.

[0011] Optionally, the diverter assembly includes a movable rod, a connecting rod and a diverter plug, the connecting rod is connected between the movable rod and the diverter plug, the diameter of the connecting rod is smaller than the diameter of the second flow channel, the length of the diverter plug along the first direction is greater than or equal to the diameter of the second flow channel, the diameter of the movable rod matches the inner diameter of the movable cavity, and the movable rod can move in the movable cavity.

[0012] Optionally, the diverter plug is provided with a first sealing surface and a second sealing surface which are interconnected, the first sealing surface extending along a first direction, and the second sealing surface extending along a second direction, and when the diverter plug moves to the connecting cavity, the first sealing surface correspondingly blocks the second flow channel to divert the coolant in the liquid inlet pipe to the first flow channel, and when the diverter plug moves to the first flow channel, the second sealing surface correspondingly blocks the first flow channel to divert the coolant in the liquid inlet pipe to the second flow channel.

[0013] Optionally, the length of the connecting rod along the first direction is greater than or equal to the diameter of the second flow channel, and when the second blocking surface corresponds to blocking the first flow channel, the connecting rod spans the second flow channel on the projection surface in the second direction.

[0014] Optionally, a cavity is provided inside the diverter plug, and a water outlet hole connected to the cavity is provided at the end of the diverter plug facing away from the connecting rod, and a water inlet hole is provided on some sides of the diverter plug. When the diverter plug is at least partially located in the connecting cavity, the coolant in the liquid inlet pipe can enter the cavity through the water inlet hole and flow to the first flow channel through the water outlet, and the diverter plug can rotate in the connecting cavity to adjust the flow diverted to the first flow channel and / or the second flow channel.

[0015] Optionally, a positioning platform is provided at one end of the movable rod facing away from the connecting rod, and a plurality of positioning holes are provided on the movable rod and / or the positioning platform along the length direction of the movable rod. A positioning pin is passed through the diverter block, and the positioning pin is used to cooperate with one of the positioning holes to limit the position of the diverter block or the diverter assembly.

[0016] Optionally, there are multiple second cold plates, and one end of each second cold plate is connected to a connecting part. The cooling device also includes a shunt pipe, a collecting pipe and a collecting block. The shunt pipe is connected to multiple connecting parts at the same time, and the collecting pipe is connected to multiple connecting parts at the same time. The shunt block is arranged on the shunt pipe, the second flow channel is connected to the shunt pipe, and the collecting block is arranged on the collecting pipe. A third flow channel is arranged inside the collecting block, and the third flow channel is connected to the collecting pipe. A liquid outlet pipe connected to the third flow channel is arranged on the collecting block, and the first flow channel and the third flow channel are respectively connected to the water inlet and the water outlet of the first cold plate.

[0017] The present application also provides a battery pack, comprising a box body, a battery and the cooling device, wherein the first cold plate is connected to the box body to form a receiving cavity, the battery, the second cold plate, the shunt block and the shunt assembly are all arranged in the receiving cavity, the first cold plate is in contact with the top surface of the battery, and the second cold plate is in contact with the side surface of the battery.

[0018] The present application also provides an electrical device, including the battery pack.

[0019] The beneficial effects of the cooling device, battery pack and electrical equipment provided by the embodiments of the present application include, for example: in order to reasonably divert the coolant and realize reasonable utilization of energy, a cooling device is designed, which includes a first cold plate, a second cold plate, a diverter block and a diverter assembly, the interior of the diverter block is provided with a first flow channel extending along a first direction and a second flow channel extending along a second direction, the first flow channel is connected to the internal flow channel of the first cold plate, and the second flow channel is connected to the internal flow channel of the second cold plate, a liquid inlet pipe corresponding to the first flow channel is provided on the diverter block, and the diverter assembly is movably arranged on the diverter block corresponding to the second flow channel, and during the movement of the diverter assembly, the coolant in the liquid inlet pipe can flow to at least one of the first flow channel and the second flow channel. During the operation of the cooling device, coolant is introduced through the liquid inlet pipe. During this process, the coolant in the liquid inlet pipe flows to at least one of the first flow channel and the second flow channel through the movable diversion component. The coolant in the first flow channel can flow into the internal flow channel of the first cold plate, and the coolant in the second flow channel can flow into the internal flow channel of the second cold plate, thereby making it possible to reasonably divert the coolant and achieve reasonable utilization of efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 An exploded view of a battery pack in an embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of a cooling device in an embodiment of the present application;

[0023] Figure 3 This is a schematic diagram of the first flow diversion component in the embodiment of the present application;

[0024] Figure 4 This is a schematic diagram of a second flow diversion component in an embodiment of the present application;

[0025] Figure 5 This is a schematic diagram showing the diverter plug in the first diverter position in the embodiment of the present application;

[0026] Figure 6 This is a schematic diagram showing the diverter plug in the second diverter position in the embodiment of the present application;

[0027] Figure 7 This is a schematic diagram showing the diverter plug in the third diverter position in the embodiment of the present application;

[0028] Figure 8 A schematic diagram of a current collecting block in an embodiment of the present application;

[0029] Fig. 9 Schematic diagram of the flange in the embodiment of the present application.

[0030] Icons: 10-battery pack; 100-first cold plate; 200-second cold plate; 210-connecting part; 300-shunt block; 310-first flow channel; 320-second flow channel; 330-liquid inlet pipe; 331-flange; 3311-second sealing ring; 3312-third sealing ring; 3313-fixing hole; 340-movable cavity; 350-connecting cavity; 360-locating pin; 400-shunt assembly; 410-movable rod; 411- The first sealing ring; 420-connecting rod; 430-diverter plug; 431-guiding surface; 432-first blocking surface; 433-second blocking surface; 434-cavity; 435-water outlet hole; 436-water inlet hole; 440-positioning platform; 450-positioning hole; 500-diverter pipe; 600-collector pipe; 700-collector block; 710-third flow channel; 720-liquid outlet pipe; 730-connecting hole; 800-housing; 900-battery. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0033] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0034] In the description of the present application, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, it is based on the orientation or position relationship shown in the drawings, or is the orientation or position relationship in which the product of the invention is usually placed when used. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0035] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0036] It should be noted that, in the absence of conflict, the features in the embodiments of the present application may be combined with each other.

[0037] The inventor of the present application has found that the cooling liquid in the liquid cooling plate on the top surface of the battery and the liquid cooling plate on the side of the battery cannot be reasonably diverted, resulting in unreasonable utilization of cooling efficiency. The embodiment of the present application provides a battery pack, which is at least used to solve this technical problem.

[0038] Please refer to Figure 1-Figure 3The embodiment of the present application provides a battery pack 10, including a box 800, a battery 900 and a cooling device, the cooling device including a first cold plate 100, a second cold plate 200, a shunt block 300 and a shunt assembly 400, the shunt block 300 is provided with a first flow channel 310 extending along a first direction z and a second flow channel 320 extending along a second direction x, which are connected to each other; the first flow channel 310 is connected to the internal flow channel of the first cold plate 100, and the second flow channel 320 is connected to the internal flow channel of the second cold plate 200, the shunt block 300 is provided with a liquid inlet pipe 330 corresponding to the first flow channel 310, and the shunt assembly 400 is movably arranged on the shunt block 300 corresponding to the second flow channel 320, and during the movement of the shunt assembly 400, the coolant in the liquid inlet pipe 330 can flow to at least one of the first flow channel 310 and the second flow channel 320.

[0039] The box body 800 is provided with a receiving cavity, the battery 900, the second cold plate 200, the shunt block 300 and the shunt assembly 400 are all arranged in the receiving cavity, the top surface of the battery 900 is provided with a bus bar, and the first cold plate 100 is connected to the box body 800 to close the receiving cavity. Figure 1 In order to improve the cooling effect, the first cold plate 100 contacts the busbar on the top surface of the battery 900 to quickly dissipate heat, and at the same time, the battery top cover can be omitted to reduce cost and weight. The second cold plate 200 contacts the side of the battery 900 to increase the heat exchange area. The coolant can be ethylene glycol solution, etc.

[0040] The battery 900 may optionally include a plurality of single cells, and a plurality of bus bars (not shown) are arranged on the top surfaces of the plurality of single cells to realize series-parallel connection through the bus bars. The first cold plate 100 is arranged on the top surfaces of the plurality of single cells to realize heat exchange, that is, simultaneously fits with the plurality of bus bars to realize heat exchange; the second cold plate 200 is arranged in the accommodating cavity, and is extended along the third direction y, and is spaced along the second direction x to simultaneously fit with the side surfaces of the plurality of single cells to realize heat exchange; the box body 800 is formed by connecting a bottom plate and a frame, and the first cold plate 100 is connected to the frame.

[0041] The extension direction of the liquid inlet pipe 330 can be selected as the third direction y, and the first direction z, the second direction x and the third direction y are perpendicular to each other; during the movement of the diverter component 400, due to the change in the position of the diverter component 400, the coolant in the liquid inlet pipe 330 flows to the first flow channel 310, or the coolant in the liquid inlet pipe 330 flows to the second flow channel 320, or the coolant in the liquid inlet pipe 330 flows to the first flow channel 310 and the second flow channel 320 at the same time.

[0042] During the process of introducing the coolant through the liquid inlet pipe 330, the coolant in the liquid inlet pipe 330 flows to at least one of the first flow channel 310 and the second flow channel 320 through the movable diverter component 400. When the coolant in the liquid inlet pipe 330 flows only to the first flow channel 310, the coolant in the first flow channel 310 can flow into the internal flow channel of the first cold plate 100, and no coolant flows into the internal flow channel of the second cold plate 200 at this time; when the coolant in the liquid inlet pipe 330 flows only to the second flow channel 320, the coolant in the second flow channel 320 can flow into the internal flow channel of the second cold plate 200, and no coolant flows into the internal flow channel of the first cold plate 100 at this time; when the coolant in the liquid inlet pipe 330 flows to the first flow channel 310 and the second flow channel 320 at the same time, coolant flows into both the internal flow channel of the first cold plate 100 and the internal flow channel of the second cold plate 200. This time, by setting the diverter block 300 and the diverter assembly 400, controllable flow distribution of the first flow channel 310 and the second flow channel 320 is achieved, the pipeline is simplified, and the distribution flow of the first cold plate 100 arranged on the top and the second cold plate 200 arranged on the side can be adjusted as needed, so that the coolant can be reasonably diverted, the efficiency can be reasonably utilized, and the heat exchange effect can be improved, saving energy consumption.

[0043] In some embodiments, the interior of the diversion block 300 is provided with an active chamber 340 and a connecting chamber 350 that are interconnected. The active chamber 340 is used for the movement of the diversion component 400. The connecting chamber 350 is arranged at the connection of the first flow channel 310 and the second flow channel 320. The liquid inlet pipe 330 is connected to the connecting chamber 350. The connecting chamber 350 corresponds to the liquid inlet pipe 330, the second flow channel 320, the first flow channel 310 and the active chamber 340 respectively, so that the overall pipeline is simpler and avoids too many bends in the pipeline to increase the flow resistance; the active chamber 340 is extended along the first direction z, and the diversion component 400 can reciprocate along the first direction z in the active chamber 340, the connecting chamber 350 and the first flow channel 310 to adjust the flow in the first flow channel 310 and the second flow channel 320. The diverter component 400 moves along the first direction z, which can achieve flow regulation in a limited space, avoid occupying the space of the accommodating cavity due to being set in the second direction x or the third direction y, and improve the overall energy density; at the same time, the diverter component 400 moves along the first direction z, which also facilitates the control of the diverter component 400 and avoids the complexity of multi-axis motion control.

[0044] The connecting chamber 350 is located at the connection between the first flow channel 310 and the second flow channel 320. The extension direction of the connecting chamber 350 is consistent with the extension direction of the liquid inlet pipe 330. The liquid inlet pipe 330, the connecting chamber 350, and the second flow channel 320 are arranged in sequence in the extension direction of the liquid inlet pipe 330, thereby shortening the liquid inlet path of the second flow channel 320, which can improve the flow accuracy and the heat exchange efficiency. During the reciprocating motion of the diverter component 400 along the first direction z in the active chamber 340, the connecting chamber 350 and the first flow channel 310, the first direction z is perpendicular to the liquid inlet path of the second flow channel 320, and the flow in the first flow channel 310 and the second flow channel 320 can be adjusted with minimum displacement, thereby realizing reasonable utilization of efficiency while simplifying the overall structure and improving space utilization.

[0045] In some embodiments, reference Figures 3 to 7 As shown, the diverter assembly 400 includes a movable rod 410, a connecting rod 420 and a diverter plug 430, the connecting rod 420 is connected between the movable rod 410 and the diverter plug 430, the diameter of the connecting rod 420 is smaller than the diameter of the second flow channel 320, the length of the diverter plug 430 along the first direction z is greater than or equal to the diameter of the second flow channel 320, the diameter of the movable rod 410 matches the inner diameter of the movable cavity 340, and the movable rod 410 can move in the movable cavity 340.

[0046] It should be noted that the diameter of the connecting rod 420 is smaller than the diameter of the second flow channel 320, so that when the connecting rod 420 is located in the connecting cavity 350, the coolant can flow to the second flow channel 320; the length of the diverter plug 430 along the first direction z is greater than or equal to the diameter of the second flow channel 320, so that when the diverter plug 430 is located in the connecting cavity 350, the diverter plug 430 can prevent the coolant from flowing to the second flow channel 320; the diameter of the movable rod 410 matches the inner diameter of the movable cavity 340, so that the movable rod 410 can stably move along the first direction z in the movable cavity 340.

[0047] During the movement of the movable rod 410, when the diverter plug 430 is located in the connecting cavity 350 and blocks the second flow channel 320, the coolant in the liquid inlet pipe 330 can flow to the first flow channel 310; when the diverter plug 430 is completely located in the first flow channel 310, the connecting rod 420 is located in the connecting cavity 350, and the coolant in the liquid inlet pipe 330 can flow to the second flow channel 320; when the diverter plug 430 is located in the movable cavity 340, the coolant in the liquid inlet pipe 330 can flow to the first flow channel 310 and the second flow channel 320, and as the diverter plug 430 moves in the movable cavity 340, the amount of coolant flowing to the first flow channel 310 and the second flow channel 320 can be distributed.

[0048] Optional, reference Figure 3As shown, the diverter plug 430 is provided with an inclined guide surface 431, and the guide surface 431 faces the liquid inlet pipe 330. When the diverter plug 430 is located in the connecting cavity 350 and blocks the second flow channel 320, the coolant in the liquid inlet pipe 330 can flow to the first flow channel 310 through the guide surface 431. The setting of the guide surface 431 can reduce the flow resistance of the coolant flowing into the first flow channel 310, reduce the local resistance coefficient, and increase the fluid flow stability. Specifically, when the diverter plug 430 moves along the first direction z to the second flow channel 320, as the obstruction between the diverter plug 430 and the second flow channel 320 gradually increases, the flow rate entering the second flow channel 320 decreases; when the diverter plug 430 completely blocks the second flow channel 320, the length of the diverter plug 430 along the first direction z is greater than the diameter of the second flow channel 320, and the diverter plug 430 is kept blocking the entire second flow channel 320. As the guide surface 431 and the first flow channel 310 become relatively close, the coolant flowing into the first flow channel 310 gradually decreases, so that the flow rate of the first flow channel 310 can be individually adjusted by the design of the guide surface 431. Optionally, the length of the diverter plug 430 along the first direction z is equal to the diameter of the second flow channel 320. After the diverter plug 430 completely blocks the second flow channel 320, the flow rate flowing into the first flow channel 310 gradually increases with the movement of the diverter plug 430. At this time, the blocking area of ​​the diverter plug 430 and the second flow channel 320 gradually decreases, so that the flow rate flowing into the second flow channel 320 gradually increases, thereby allowing the flow rates in the first flow channel 310 and the second flow channel 320 to be adjusted at the same time. In some embodiments, the diverter plug 430 is provided with a first sealing surface 432 and a second sealing surface 433 that are interconnected. The first sealing surface 432 extends along a first direction z, and the second sealing surface 433 extends along a second direction x. When the diverter plug 430 moves to the connecting cavity 350, the first sealing surface 432 corresponds to blocking the second flow channel 320 to guide the coolant in the liquid inlet pipe 330 to the first flow channel 310. When the diverter plug 430 moves to the first flow channel 310, the second sealing surface 433 corresponds to blocking the first flow channel 310 to guide the coolant in the liquid inlet pipe 330 to the second flow channel 320.

[0049] The first blocking surface 432 is a cylindrical surface, that is, it can be the side surface of the diverter plug 430, and the second blocking surface 433 is the surface where the diverter plug 430 is connected to the connecting rod 420, that is, it can be the bottom surface of the diverter plug 430. When the diverter plug 430 moves to the connecting cavity 350, the first blocking surface 432 can block the second flow channel 320, so that the coolant in the liquid inlet pipe 330 is guided to the first flow channel 310 through the guide surface 431; when the diverter plug 430 moves to the first flow channel 310, the second blocking surface 433 can block the first flow channel 310, so that the coolant in the liquid inlet pipe 330 is guided to the second flow channel 320. Through the two blocking surfaces, the first flow channel 310 and the second flow channel 320 can be blocked separately, and the first cold plate 100 and the second cold plate 200 can be independently controlled.

[0050] In some embodiments, the length of the connecting rod 420 along the first direction z is greater than or equal to the diameter of the second flow channel 320 , and when the second blocking surface 433 blocks the first flow channel 310 , the connecting rod 420 spans the second flow channel 320 on the projection surface of the second direction x.

[0051] During the movement of the diverter plug 430, the connecting rod 420 will move into the connecting cavity 350. When the length of the connecting rod 420 along the first direction z is greater than or equal to the diameter of the second flow channel 320, the connecting rod 420 crosses the second flow channel 320 on the projection surface of the second direction x, so that the coolant can flow into the second flow channel 320 in the gap between the connecting rod 420 and the connecting cavity 350, so as to ensure the flow area of ​​the coolant flowing into the second flow channel 320 and avoid the length of the connecting rod 420 being too short to block the flow of the coolant.

[0052] In some embodiments, reference Figure 3 A positioning platform 440 is provided at one end of the movable rod 410 away from the connecting rod 420, and a plurality of positioning holes 450 are provided on the movable rod 410 and / or the positioning platform 440 along the length direction of the movable rod 410. A positioning pin 360 is passed through the diverter block 300, and the positioning pin 360 is used to cooperate with one of the positioning holes 450 to limit the position of the diverter block 300 or the diverter assembly 400.

[0053] It should be noted that, in the length direction of the movable rod 410 , that is, the first direction z, the plurality of positioning holes 450 may be provided only on the movable rod 410 , only on the positioning platform 440 , or simultaneously on the movable rod 410 and the positioning platform 440 to increase the number of the positioning holes 450 .

[0054] In the process of adjusting the position of the shunt assembly 400, the shunt assembly 400 is first moved along the first direction z. When the shunt assembly 400 is moved into place, the locating pin 360 is passed through any one of the locating holes 450 on the shunt block 300 and the movable rod 410 and / or the positioning platform 440. At this time, the shunt assembly 400 can be restricted from continuing to move, and the shunt block 300 or the shunt assembly 400 is positioned. It can be understood that by setting the locating pin 360, the shunt block 300 and the shunt assembly 400 can be fixed. At the same time, the setting of multiple locating holes 450 can adjust the relative position of the shunt assembly 400 and the shunt block 300, thereby realizing flow distribution. It should be noted that when the shunt block 300 is fixed to the box body 800, the shunt assembly 400 can be fixed to the shunt block 300 by the locating pin 360; when the shunt assembly 400 is fixed to the box body 800, the shunt block 300 can be fixed to the shunt assembly 400 by the locating pin. In particular, when the shunt assembly 400 is fixed to the shunt block, the structural stability of the two can be further ensured to avoid stress concentration and structural damage due to vibration, etc. Furthermore, the smaller the spacing between the positioning holes 450 and the greater the number, the higher the adjustment accuracy. The number of positioning holes 450 and the spacing between the positioning holes 450 can be set as needed.

[0055] Please refer to Figure 4 In some embodiments, a cavity 434 is provided inside the diverter plug 430, and a water outlet 435 connected to the cavity 434 is provided at one end of the diverter plug 430 away from the connecting rod 420, and a water inlet 436 is provided on part of the side of the diverter plug 430. When the diverter plug 430 is at least partially located in the connecting cavity 350, the coolant in the liquid inlet pipe 330 can enter the cavity 434 through the water inlet hole 436 and flow to the first flow channel 310 through the water outlet 435, and the diverter plug 430 can rotate in the connecting cavity 350 to adjust the flow diverted to the first flow channel 310 and / or the second flow channel 320.

[0056] The number of water inlet holes 436 can be selected to be multiple, and the multiple water inlet holes 436 are arranged at intervals along the circumference of the diverter plug 430; when the diverter plug 430 is at least partially located in the connecting cavity 350, the coolant in the liquid inlet pipe 330 can enter the cavity 434 through the multiple water inlet holes 436 and flow to the first flow channel 310 through the water outlet hole 435. At this time, the side of the diverter plug 430 where no water inlet holes 436 are arranged (i.e., the first blocking surface 432) blocks the second flow channel 320, so that the coolant can only flow to the first flow channel 310. At this time, by rotating the diverter plug 430, the number of water inlet holes 436 corresponding to the liquid inlet pipe 330 can be adjusted, that is, the first blocking surface 432 and the liquid inlet pipe 330 are partially blocked, and the flow rate of the first flow channel 310 can be independently adjusted. At this time, the distribution range of the multiple water inlet holes 436 in the circumference of the diverter plug 430 is less than or equal to one half, refer to Figure 4 shown.

[0057] like Figure 5 As shown, when the flow diversion plug 430 is located in the active cavity 340, it is in the first flow diversion position. Figure 6 As shown, the flow diversion plug 430 is located in the connecting cavity 350 and is in the second flow diversion position when blocking the second flow channel 320. Figure 7 As shown, when the diverter plug 430 is completely located in the first flow channel 310, it is in the third diverter position.

[0058] When the diverter plug 430 is in the first diverter position, the coolant can flow into the first flow channel 310 and the second flow channel 320. When the diverter plug 430 moves from the first diverter position to the second diverter position, the flow rate of the coolant entering the second flow channel 320 gradually decreases until it becomes zero. When the diverter plug 430 moves from the second diverter position to the third diverter position, the flow rate of the coolant entering the second flow channel 320 gradually increases and the flow rate of the coolant in the first flow channel 310 decreases until it becomes zero.

[0059] In some embodiments, there are multiple second cold plates 200, and the multiple second cold plates are arranged at intervals along the second direction x. One end of each second cold plate 200 is connected with a connecting portion 210. The cooling device also includes a shunt pipe 500, a header 600 and a header block 700. The shunt pipe 500 is connected to multiple connecting portions 210 at the same time, and the header 600 is connected to multiple connecting portions 210 at the same time. The shunt block 300 is arranged on the shunt pipe 500, and the second flow channel 320 is connected to the shunt pipe 500 to supply liquid to the multiple second cold plates 200 through the second flow channel 320. The header block 700 is arranged on the header 600; Figure 8As shown, the manifold 700 is respectively connected to the first cold plate 100 and the second cold plate 200 to achieve the outflow of the coolant. A third flow channel 710 is provided inside the manifold 700, and the third flow channel 710 is connected to the manifold 600 to achieve communication with the second cold plate 200. Specifically, the third flow channel 710 can be respectively connected to the manifold 600 and the connecting portion 210, so that the coolant flows out from the connecting portion 210 and the manifold 600 to the manifold 700. The first flow channel 310 and the third flow channel 710 are respectively connected to the water inlet and the water outlet of the first cold plate 100. Specifically, the manifold 700 is provided with a connecting hole 730 connected to the third flow channel 710, and the connecting hole 730 is used to communicate with the water outlet of the first cold plate 100, so that the coolant of the first cold plate 100 flows to the third flow channel 710. Specifically, the connection hole 730 can be connected to the water outlet of the first cold plate 100 through a connection pipe (not shown). The manifold 700 is also provided with a liquid outlet pipe 720 connected to the third flow channel 710, so that the coolant of the first cold plate 100 and the second cold plate 200 can flow out. Through the arrangement of the manifold 700, the liquid of the first cold plate 100 and the second cold plate 200 can flow out at the same time, simplifying the structure, reducing space occupation, and improving space utilization.

[0060] When the coolant is introduced through the liquid inlet pipe 330, the coolant can flow into the internal flow channel of the first cold plate 100 through the first flow channel 310 and the water inlet of the first cold plate 100, and then flow out from the water outlet of the first cold plate 100 through the connecting hole 730 to the third flow channel 710, and finally be discharged through the liquid outlet pipe 720 connected to the third flow channel 710; in addition, the coolant can also flow into the shunt pipe 500 from the second flow channel 320, and then flow into the plurality of second cold plates 200 through the plurality of connecting parts 210 connected to the shunt pipe 500, and then flow into the manifold 600 through the plurality of connecting parts 210 of the plurality of second cold plates 200, and finally flow into the liquid outlet pipe 720 through the third flow channel 710 on the manifold 700 and be discharged. In some embodiments, a driving member (not shown) is provided at one end of the movable rod 410 away from the connecting rod 420, and the driving member is used to drive the movable rod 410 to move in the movable cavity 340. At this time, the movable rod 410 can be fixed inside the box 800 to achieve automatic control.

[0061] The driving member may be an electric push rod, which is connected to the movable rod 410 to drive the movable rod 410 to move in the movable cavity 340, so as to make the movement accuracy of the diverter component 400 higher.

[0062] The battery pack 10 also includes a BMS system, which uses the BMS to collect the temperature of the battery 900 to control the operation of the electric push rod, so that the electric push rod pushes the shunt plug 430 to move along the first direction z to achieve a precise shunt effect.

[0063] In some embodiments, a plurality of first sealing rings 411 are disposed on the movable rod 410 at intervals along its length direction.

[0064] The first sealing ring 411 is made of silicone rubber such as DPDM. By arranging a plurality of grooves at intervals on the movable rod 410 and embedding a first sealing ring 411 in each groove, the sealing between the movable rod 410 and the movable cavity 340 can be improved, so that the coolant is not easily circulated in the movable cavity 340, thereby reducing the loss of the coolant.

[0065] In addition, the liquid inlet pipe 330 and the liquid outlet pipe 720 are both fixed to the box body 800 through the flange 331. Fig. 9 As shown, a groove is provided on the surface of the flange 331 facing the box body 800, a second sealing ring 3311 is provided in the groove, a third sealing ring 3312 is provided inside the flange 331, the second sealing ring 3311 is sealed with the outer wall of the box body 800, and the third sealing ring 3312 is sealed with the outer wall of the liquid inlet pipe 330 or the liquid outlet pipe 720. The fixing method of the flange 331 includes: at least two fixing holes 3313 are opened on the flange 331, and the flange 331 is fixed to the box body 800 by passing bolts through the fixing holes 3313 and connecting with the outer wall of the box body 800; and the flange 331 is directly welded to the outer wall of the box body 800 by spot welding.

[0066] The embodiment of the present application also provides an electric device, including the above-mentioned battery pack 10. For example, the electric device can be a vehicle, a ship, a spacecraft, etc. The vehicle can be a fuel vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, etc.; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. The embodiment of the present application does not impose any special restrictions on the above-mentioned electric devices.

[0067] The technical effects of the cooling device, battery pack 10 and electrical equipment provided by the embodiments of the present application include at least: regulating the flow of the first cold plate 100 and the second cold plate 200 through the shunt plug 430 can reduce the pipeline to a certain extent; the shunt plug 430 can realize the flow regulation of the first cold plate 100 and the second cold plate 200, which is convenient for expanding the control strategy, realizing precise heat exchange, and improving the heat exchange efficiency and heat exchange effect; the first cold plate 100 is directly in contact with the bus to quickly dissipate heat, and at the same time can reduce the cross-sectional area of ​​the bus, reduce costs and reduce weight; an electric push rod can be used to push the shunt plug 430 to move to reasonably shunt the first cold plate 100 and the second cold plate 200 to achieve reasonable utilization of efficiency.

[0068] In summary, the embodiments of the present application provide a cooling device, a battery pack 10 and an electrical device, wherein coolant is introduced through the liquid inlet pipe 330. During this process, the coolant in the liquid inlet pipe 330 flows to at least one of the first flow channel 310 and the second flow channel 320 through the active diversion component 400. The coolant in the first flow channel 310 can flow into the internal flow channel of the first cold plate 100, and the coolant in the second flow channel 320 can flow into the internal flow channel of the second cold plate 200, thereby enabling the coolant to be reasonably diverted and achieving reasonable efficiency utilization.

[0069] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A cooling device, characterized in that: The invention comprises a first cold plate (100), a second cold plate (200), a flow diverter block (300) and a flow diverter assembly (400); the flow diverter block (300) is provided with a first flow channel (310) extending in a first direction and a second flow channel (320) extending in a second direction, the first flow channel (310) is connected to the internal flow channel of the first cold plate (100), the second flow channel (320) is connected to the internal flow channel of the second cold plate (200), the flow diverter block (300) is provided with a liquid inlet pipe (330) corresponding to the first flow channel (310), the flow diverter assembly (400) is movably provided on the flow diverter block (300) corresponding to the second flow channel (320), and during the movement of the flow diverter assembly (400), the coolant in the liquid inlet pipe (330) can flow to at least one of the first flow channel (310) and the second flow channel (320).

2. The cooling device according to claim 1, characterized in that: The flow dividing block (300) is provided with an active cavity (340) and a connecting cavity (350) which are interconnected. The active cavity (340) is used for the flow dividing component (400) to move. The connecting cavity (350) is provided at the connection between the first flow channel (310) and the second flow channel (320). The liquid inlet pipe (330) is connected to the connecting cavity (350). The active cavity (340) is extended along the first direction, and the flow dividing assembly (400) can reciprocate along the first direction in the active cavity (340), the connecting cavity (350) and the first flow channel (310) to adjust the flow in the first flow channel (310) and the second flow channel (320), and the first direction is perpendicular to the second direction.

3. The cooling device according to claim 2, characterized in that: The diverter assembly (400) comprises a movable rod (410), a connecting rod (420) and a diverter plug (430); the connecting rod (420) is connected between the movable rod (410) and the diverter plug (430); the diameter of the connecting rod (420) is smaller than the diameter of the second flow channel (320); the length of the diverter plug (430) along the first direction is greater than or equal to the diameter of the second flow channel (320); the diameter of the movable rod (410) matches the inner diameter of the movable cavity (340); and the movable rod (410) is movable in the movable cavity (340).

4. The cooling device according to claim 3, characterized in that: The diverter plug (430) is provided with a first sealing surface (432) and a second sealing surface (433) which are connected to each other. The first sealing surface (432) extends along a first direction, and the second sealing surface (433) extends along a second direction. When the diverter plug (430) moves to the connecting cavity (350), the first sealing surface (432) corresponds to blocking the second flow channel (320) to guide the coolant in the liquid inlet pipe (330) to the first flow channel (310). When the diverter plug (430) moves to the first flow channel (310), the second sealing surface (433) corresponds to blocking the first flow channel (310) to guide the coolant in the liquid inlet pipe (330) to the second flow channel (320).

5. The cooling device according to claim 4, characterized in that: The length of the connecting rod (420) along the first direction is greater than or equal to the diameter of the second flow channel (320), and when the second blocking surface (433) corresponds to blocking the first flow channel (310), the connecting rod (420) spans the second flow channel (320) on the projection surface in the second direction.

6. The cooling device according to claim 3, characterized in that: A cavity (434) is provided inside the diverter plug (430); an end of the diverter plug (430) facing away from the connecting rod (420) is provided with a water outlet (435) connected to the cavity (434); a part of the side surface of the diverter plug (430) is provided with a water inlet (436); when the diverter plug (430) is at least partially located in the connecting cavity (350), the coolant in the liquid inlet pipe (330) can enter the cavity (434) through the water inlet hole (436) and flow to the first flow channel (310) through the water outlet (435); and the diverter plug (430) can rotate in the connecting cavity (350) to adjust the flow diverted to the first flow channel (310) and / or the second flow channel (320).

7. The cooling device according to claim 3, characterized in that: A positioning platform (440) is provided at one end of the movable rod (410) away from the connecting rod (420); a plurality of positioning holes (450) are provided on the movable rod (410) and / or the positioning platform (440) along the length direction of the movable rod (410); a positioning pin (360) is passed through the diverter block (300); the positioning pin (360) is used to cooperate with one of the positioning holes (450) to limit the position of the diverter block (300) or the diverter assembly (400).

8. The cooling device according to claim 1, characterized in that: There are a plurality of second cold plates (200), one end of each second cold plate (200) is connected to a connecting portion (210), the cooling device further comprises a shunt pipe (500), a header pipe (600) and a header block (700), the shunt pipe (500) is connected to the plurality of connecting portions (210) at the same time, the header pipe (600) is connected to the plurality of connecting portions (210) at the same time, the shunt block (300) is arranged on the shunt pipe (500), and the second flow channel (320) is connected to The shunt pipe (500) is connected, the collecting block (700) is arranged on the collecting pipe (600), a third flow channel (710) is arranged inside the collecting block (700), the third flow channel (710) is connected to the collecting pipe (600), a liquid outlet pipe (720) connected to the third flow channel (710) is arranged on the collecting block (700), and the first flow channel (310) and the third flow channel (710) are respectively connected to the water inlet and the water outlet of the first cold plate (100).

9. A battery pack, characterized in that: The invention comprises a box body (800), a battery (900) and a cooling device according to any one of claims 1 to 8, wherein the first cold plate (100) is connected to the box body (800) to form a receiving cavity, the battery (900), the second cold plate (200), the shunt block (300) and the shunt assembly (400) are all arranged in the receiving cavity, the first cold plate (100) is in contact with the top surface of the battery (900), and the second cold plate (200) is in contact with the side surface of the battery (900).

10. An electrical device, characterized in that: Comprising the battery pack (10) as claimed in claim 9.

Images