Cooling device, battery pack and electric equipment

Abstract

The application provides a cooling device, a battery pack and a power utilization equipment, and relates to the technical field of batteries. The cooling device comprises a first cold plate, a second cold plate, a flow splitting block and a flow splitting assembly. The flow splitting block is internally provided with a first flow channel extending in a first direction and a second flow channel extending in a second direction, which are connected. The first flow channel is connected with an internal flow channel of the first cold plate, and the second flow channel is connected with an internal flow channel of the second cold plate. The flow splitting block is provided with a liquid inlet pipe corresponding to the first flow channel. The flow splitting assembly is movably arranged on the flow splitting block corresponding to the second flow channel. During the movement of the flow splitting assembly, the cooling liquid in the liquid inlet pipe can flow to at least one of the first flow channel and the second flow channel, so that the cooling liquid can be reasonably split, and the efficiency can be reasonably utilized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a cooling device, a battery pack and an electric equipment. BACKGROUND

[0002] At present, new energy vehicles have higher and higher requirements for the charging rate of power batteries, and the temperature rise of power batteries under large-rate 4C or more charging and discharging working conditions is increasingly concerned. At present, the temperature rise of power batteries is solved by designing multi-surface cooling solutions, for example, liquid cooling plates are arranged on the top surface of the battery for cooling, and liquid cooling plates are also arranged on the side surface of the battery for cooling.

[0003] At present, the cooling liquid in the liquid cooling plates arranged on different surfaces of the battery cannot be reasonably distributed, resulting in unreasonable utilization of cooling efficiency. SUMMARY

[0004] The purposes of the present application include, for example, providing a cooling device capable of reasonably distributing cooling liquid and realizing reasonable utilization of efficiency.

[0005] The purposes of the present application also include providing a battery pack capable of reasonably distributing cooling liquid and realizing reasonable utilization of efficiency.

[0006] The purposes of the present application also include providing an electric equipment capable of reasonably distributing cooling liquid and realizing reasonable utilization of efficiency.

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

[0008] The embodiments of the present application provide a cooling device, which comprises a first cold plate, a second cold plate, a distribution block and a distribution assembly. The inside of the distribution block is provided with a first flow channel extending in a first direction and a second flow channel extending in a second direction which are connected. The first flow channel is connected with an internal flow channel of the first cold plate, and the second flow channel is connected with an internal flow channel of the second cold plate. The distribution block is provided with a liquid inlet pipe corresponding to the first flow channel. The distribution assembly is movably arranged on the distribution block corresponding to the second flow channel. During the movement of the distribution assembly, the cooling liquid in the liquid inlet pipe can flow to at least one of the first flow channel and the second flow channel.

[0009] Optionally, the inside of the distribution block is provided with a movable cavity and a connecting cavity which are connected with each other. The movable cavity is used for movement of the distribution assembly. The connecting cavity is arranged at the connection of the first flow channel and the second flow channel. The liquid inlet pipe is connected with the connecting cavity.

[0010] The movable cavity is arranged along the first direction, and the shunt assembly is capable of reciprocating in the movable 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 shunt assembly comprises a movable rod, a connecting rod and a shunt plug, the connecting rod is connected between the movable rod and the shunt plug, the diameter of the connecting rod is smaller than the diameter of the second flow channel, the length of the shunt 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 is capable of moving in the movable cavity.

[0012] Optionally, the shunt plug is provided with a first sealing surface and a second sealing surface connected with each other, the first sealing surface extends along the first direction, and the second sealing surface extends along the second direction, when the shunt plug moves to the connecting cavity, the first sealing surface corresponds to seal the second flow channel to guide the cooling liquid in the liquid inlet pipe to the first flow channel, and when the shunt plug moves to the first flow channel, the second sealing surface corresponds to seal the first flow channel to guide the cooling liquid 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 sealing surface corresponds to seal the first flow channel, the connecting rod spans the second flow channel on the projection surface in the second direction.

[0014] Optionally, the shunt plug is internally provided with a cavity, one end of the shunt plug away from the connecting rod is provided with a water outlet hole in communication with the cavity, and part of the side surface of the shunt plug is provided with a water inlet hole, when the shunt plug is at least partially located in the connecting cavity, the cooling liquid 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 hole, and the shunt plug can rotate in the connecting cavity to adjust the flow guided to the first flow channel and / or the second flow channel.

[0015] Optionally, one end of the movable rod away from the connecting rod is provided with a positioning table, a plurality of positioning holes are arranged on the movable rod and / or the positioning table along the length direction of the movable rod, and a positioning pin is arranged on the shunt block, the positioning pin is used to cooperate with one of the positioning holes to limit the position of the shunt block or the shunt assembly.

[0016] Optionally, the number of the second cold plates is multiple, one end of each of the second cold plates is provided with a communication part in communication, the cooling device further comprises a shunt pipe, a collecting pipe and a collecting block, the shunt pipe is in communication with multiple communication parts at the same time, the collecting pipe is in communication with multiple communication parts at the same time, the shunt block is arranged on the shunt pipe, the second flow channel is in communication with the shunt pipe, the collecting block is arranged on the collecting pipe, the third flow channel is arranged in the collecting block, the third flow channel is in communication with the collecting pipe, the liquid outlet pipe in communication with the third flow channel is arranged on the collecting block, and the first flow channel and the third flow channel are in communication with the water inlet and the water outlet of the first cold plate respectively.

[0017] The application further provides a battery pack comprising a box body, a battery and the cooling device, the first cold plate is connected with the box body to form a containing cavity, the battery, the second cold plate, the shunt block and the shunt assembly are arranged in the containing 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 application further provides a battery pack comprising a box body, a battery and the cooling device, the first cold plate is connected with the box body to form a containing cavity, the battery, the second cold plate, the shunt block and the shunt assembly are arranged in the containing 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.

[0019] The cooling device, the battery pack and the electric equipment provided by the application have the following beneficial effects: in order to reasonably distribute the cooling liquid and realize reasonable utilization of efficiency, a cooling device is designed, the cooling device comprises a first cold plate, a second cold plate, a shunt block and a shunt assembly, the shunt block is internally provided with a first flow channel extending in a first direction and a second flow channel extending in a second direction in communication, the first flow channel is in communication with the internal flow channel of the first cold plate, the second flow channel is in communication with the internal flow channel of the second cold plate, the shunt block is provided with a liquid inlet pipe corresponding to the first flow channel, the shunt assembly is movably arranged on the shunt block corresponding to the second flow channel, and in the process of movement of the shunt assembly, the cooling liquid in the liquid inlet pipe can flow to at least one of the first flow channel and the second flow channel. In the process of operation of the cooling device, the cooling liquid is introduced through the liquid inlet pipe, and in this process, the cooling liquid in the liquid inlet pipe is caused to flow to at least one of the first flow channel and the second flow channel by moving the shunt assembly, the cooling liquid in the first flow channel can flow into the internal flow channel of the first cold plate, and the cooling liquid in the second flow channel can flow into the internal flow channel of the second cold plate, so that the cooling liquid can be reasonably distributed, and the efficiency can be reasonably utilized. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0021] Figure 1 The exploded view of the battery pack in the embodiments of the present application;

[0022] Figure 2 The schematic view of the cooling device in the embodiments of the present application;

[0023] Figure 3 The schematic view of the first shunt assembly in the embodiments of the present application;

[0024] Figure 4 The schematic view of the second shunt assembly in the embodiments of the present application;

[0025] Figure 5 The schematic view of the shunt plug in the first shunt position in the embodiments of the present application;

[0026] Figure 6 The schematic view of the shunt plug in the second shunt position in the embodiments of the present application;

[0027] Figure 7 The schematic view of the shunt plug in the third shunt position in the embodiments of the present application;

[0028] Figure 8 The schematic view of the current collecting block in the embodiments of the present application;

[0029] Figure 9 The schematic view of the flange in the embodiments of the present application.

[0030] Figure: 10-battery pack; 100-first cold plate; 200-second cold plate; 210-communication 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-connection cavity; 360-positioning pin; 400-shunt assembly; 410-movable rod; 411-first sealing ring; 420-connection rod; 430-shunt plug; 431-flow guide surface; 432-first plugging surface; 433-second plugging surface; 434-cavity; 435-water outlet hole; 436-water inlet hole; 440-positioning table; 450-positioning hole; 500-shunt pipe; 600-current collecting pipe; 700-current collecting block; 710-third flow channel; 720-liquid outlet pipe; 730-connection hole; 800-box; 900-battery. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this application, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed during use, they are only for the convenience of describing this application and simplifying the description, and do not 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.

[0035] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0036] It should be noted that, where there is no conflict, the features in the embodiments of this application can be combined with each other.

[0037] The inventors of this application have discovered that currently, the coolant in the liquid cooling plates on the top and sides of the battery cannot be properly distributed, resulting in inefficient use of cooling capacity. Embodiments of this application provide a battery pack that at least addresses this technical problem.

[0038] Please refer to Figures 1-3Embodiments of the present application provide a battery pack 10, comprising a box 800, a battery 900, and a cooling device, the cooling device comprising a first cold plate 100, a second cold plate 200, a flow distribution block 300, and a flow distribution assembly 400, the flow distribution block 300 is internally provided with a first flow channel 310 extending in a first direction z and a second flow channel 320 extending in a second direction x which are in communication; the first flow channel 310 is in communication with the internal flow channel of the first cold plate 100, and the second flow channel 320 is in communication with the internal flow channel of the second cold plate 200; the flow distribution block 300 is provided with a liquid inlet pipe 330 corresponding to the first flow channel 310, and the flow distribution assembly 400 is movably arranged on the flow distribution block 300 corresponding to the second flow channel 320; during the movement of the flow distribution assembly 400, the cooling liquid in the liquid inlet pipe 330 can flow into at least one of the first flow channel 310 and the second flow channel 320.

[0039] The box 800 is provided with a receiving cavity, the battery 900, the second cold plate 200, the flow distribution block 300, and the flow distribution assembly 400 are arranged in the receiving cavity, the top surface of the battery 900 is provided with a busbar, the first cold plate 100 is connected with the box 800 to close the receiving cavity, as shown in Figure 1 To improve the cooling effect, the first cold plate 100 is in contact with the busbar on the top surface of the battery 900 for rapid heat dissipation, and at the same time, the battery top cover can be omitted to reduce cost and weight; the second cold plate 200 is in contact with the side surface of the battery 900 to increase the heat exchange area; the cooling liquid can be a glycol solution.

[0040] The battery 900 can be selected to comprise a plurality of single battery cells, the top surface of the plurality of single battery cells is provided with a plurality of busbars (not shown) to realize series and parallel connection through the busbars; the first cold plate 100 is arranged on the top surface of the plurality of single battery cells to realize heat exchange, that is, the first cold plate 100 is simultaneously in contact with the plurality of busbars to realize heat exchange; the second cold plate 200 is arranged in the receiving cavity and extends in a third direction y and is arranged in the second direction x to simultaneously realize heat exchange with the side surface of the plurality of single battery cells; the box 800 is connected by a bottom plate and a frame, and the first cold plate 100 is connected with the frame.

[0041] The extension direction of the liquid inlet pipe 330 can be 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 flow distribution assembly 400, due to the change of the position of the flow distribution assembly 400, the cooling liquid in the liquid inlet pipe 330 flows into the first flow channel 310, or the cooling liquid in the liquid inlet pipe 330 flows into the second flow channel 320, or the cooling liquid in the liquid inlet pipe 330 simultaneously flows into the first flow channel 310 and the second flow channel 320.

[0042] During the process of the cooling liquid flowing into the liquid inlet pipe 330, the cooling liquid in the liquid inlet pipe 330 flows into at least one of the first flow channel 310 and the second flow channel 320 by the movable shunt assembly 400. When the cooling liquid in the liquid inlet pipe 330 only flows into the first flow channel 310, the cooling liquid in the first flow channel 310 can flow into the internal flow channel of the first cold plate 100, and at this time, the internal flow channel of the second cold plate 200 has no cooling liquid flowing in. When the cooling liquid in the liquid inlet pipe 330 only flows into the second flow channel 320, the cooling liquid in the second flow channel 320 can flow into the internal flow channel of the second cold plate 200, and at this time, the internal flow channel of the first cold plate 100 has no cooling liquid flowing in. When the cooling liquid in the liquid inlet pipe 330 flows into the first flow channel 310 and the second flow channel 320 at the same time, the internal flow channel of the first cold plate 100 and the internal flow channel of the second cold plate 200 all have cooling liquid flowing in. At different times, by the arrangement of the shunt block 300 and the shunt assembly 400, the controllable flow distribution of the first flow channel 310 and the second flow channel 320 is realized, 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 controlled according to the need, so that the cooling liquid can be reasonably shunted, the efficiency can be reasonably utilized, and the heat exchange effect can be improved, thereby saving energy consumption.

[0043] In some embodiments, the shunt block 300 is internally provided with a movable cavity 340 and a connecting cavity 350 that are in communication with each other. The movable cavity 340 is used for the movement of the shunt assembly 400, and the connecting cavity 350 is arranged at the connection of the first flow channel 310 and the second flow channel 320. The liquid inlet pipe 330 is in communication with the connecting cavity 350, and the connecting cavity 350 corresponds to the liquid inlet pipe 330, the second flow channel 320, the first flow channel 310, and the movable cavity 340, respectively, so that the overall pipeline is more simple, and the flow resistance caused by excessive bending of the pipeline is avoided. The movable cavity 340 is arranged in extension along the first direction z, and the shunt assembly 400 can reciprocate in the movable cavity 340, the connecting cavity 350, and the first flow channel 310 along the first direction z to adjust the flow in the first flow channel 310 and the second flow channel 320. The shunt assembly 400 moves along the first direction z, which can realize flow adjustment in a limited space, avoids occupying the space of the accommodation cavity by being arranged in the second direction x or the third direction y, and improves the overall energy density. At the same time, the movement of the shunt assembly 400 along the first direction z also facilitates the control of the shunt assembly 400 and avoids the complexity of multi-axis movement control.

[0044] The connecting cavity 350 is located at the connection of the first flow channel 310 and the second flow channel 320, the extension direction of the connecting cavity 350 is consistent with the extension direction of the liquid inlet pipe 330, the liquid inlet pipe 330, the connecting cavity 350 and the second flow channel 320 are sequentially arranged in the extension direction of the liquid inlet pipe 330, so as to shorten the liquid inlet path of the second flow channel 320, improve the flow accuracy and improve the heat exchange efficiency; during the reciprocating movement of the shunt assembly 400 in the first direction z in the movable cavity 340, the connecting cavity 350 and the first flow channel 310, the first direction z is perpendicular to the liquid inlet path of the second flow channel 320, the flow in the first flow channel 310 and the second flow channel 320 can be adjusted with the minimum displacement, the overall structure is simplified, and the space utilization rate is improved.

[0045] In some embodiments, with reference to Figures 3 to 7 The shunt assembly 400 includes a movable rod 410, a connecting rod 420 and a shunt plug 430, the connecting rod 420 is connected between the movable rod 410 and the shunt plug 430, the diameter of the connecting rod 420 is smaller than the diameter of the second flow channel 320, the length of the shunt plug 430 in 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 cooling liquid can flow to the second flow channel 320; the length of the shunt plug 430 in the first direction z is greater than or equal to the diameter of the second flow channel 320, so that when the shunt plug 430 is located in the connecting cavity 350, the shunt plug 430 can prevent the cooling liquid 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 in the first direction z in the movable cavity 340.

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

[0048] Optionally, with reference to Figure 3As shown, the shunt plug 430 is provided with an inclined flow guide surface 431, and the flow guide surface 431 faces the liquid inlet pipe 330. When the shunt plug 430 is located in the connecting cavity 350 and blocks the second flow channel 320, the cooling liquid in the liquid inlet pipe 330 can flow to the first flow channel 310 through the flow guide surface 431. The provision of the flow guide surface 431 can reduce the flow resistance of the cooling liquid flowing into the first flow channel 310, reduce the local resistance coefficient, and increase the stability of fluid flow. Specifically, when the shunt plug 430 moves in the first direction z to the second flow channel 320, as the blocking of the shunt plug 430 to the second flow channel 320 gradually increases, the flow into the second flow channel 320 decreases. When the shunt plug 430 completely blocks the second flow channel 320, the length of the shunt plug 430 in the first direction z is greater than the diameter of the second flow channel 320, so that the shunt plug 430 completely blocks the second flow channel 320. As the flow guide surface 431 is relatively close to the first flow channel 310, the cooling liquid flowing into the first flow channel 310 gradually decreases, so that the flow of the first flow channel 310 can be adjusted individually by the design of the flow guide surface 431. Alternatively, the length of the shunt plug 430 in the first direction z is equal to the diameter of the second flow channel 320. After the shunt plug 430 completely blocks the second flow channel 320, as the shunt plug 430 moves, the flow into the first flow channel 310 gradually increases. At this time, the blocking area of the shunt plug 430 and the second flow channel 320 gradually decreases, so that the flow into the second flow channel 320 gradually increases, so that the flow in the first flow channel 310 and the second flow channel 320 can be adjusted at the same time. In some embodiments, the shunt plug 430 is provided with a first blocking surface 432 and a second blocking surface 433 connected to each other. The first blocking surface 432 extends in the first direction z, and the second blocking surface 433 extends in the second direction x. When the shunt plug 430 moves to the connecting cavity 350, the first blocking surface 432 corresponds to block the second flow channel 320 to guide the cooling liquid in the liquid inlet pipe 330 to the first flow channel 310. When the shunt plug 430 moves to the first flow channel 310, the second blocking surface 433 corresponds to block the first flow channel 310 to guide the cooling liquid in the liquid inlet pipe 330 to the second flow channel 320.

[0049] The first sealing surface 432 is a cylindrical surface, i.e., can be the side surface of the shunt plug 430, and the second sealing surface 433 is the surface of the shunt plug 430 connected with the connecting rod 420, i.e., can be the bottom surface of the shunt plug 430. When the shunt plug 430 moves to the connecting cavity 350, the first sealing surface 432 can seal the second flow channel 320, so that the cooling liquid in the liquid inlet pipe 330 is guided to the first flow channel 310 through the flow guiding surface 431; when the shunt plug 430 moves to the first flow channel 310, the second sealing surface 433 can seal the first flow channel 310, so that the cooling liquid in the liquid inlet pipe 330 is guided to the second flow channel 320. Through the two sealing surfaces, the first flow channel 310 and the second flow channel 320 can be individually sealed, 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 sealing surface 433 corresponds to sealing the first flow channel 310, the connecting rod 420 spans the second flow channel 320 on the projection plane in the second direction x.

[0051] During the movement of the shunt plug 430, the connecting rod 420 moves 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 spans the second flow channel 320 on the projection plane in the second direction x, so that the cooling liquid can flow into the second flow channel 320 in the gap between the connecting rod 420 and the connecting cavity 350, to ensure the flow area of the cooling liquid flowing into the second flow channel 320, and avoid that the length of the connecting rod 420 is too short to block the flow of the cooling liquid.

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

[0053] It should be noted that the length direction of the movable rod 410 is the first direction z, and the plurality of positioning holes 450 can be provided only on the movable rod 410, only on the positioning table 440, or on both the movable rod 410 and the positioning table 440, so as to increase the number of the positioning holes 450.

[0054] In the process of adjusting the position of the flow distribution assembly 400, first move the flow distribution assembly 400 in the first direction z, when the flow distribution assembly 400 is moved into position, by passing the positioning pin 360 through any one of the positioning holes 450 on the flow distribution block 300 and the movable rod 410 and / or the positioning table 440, at this time the movement of the flow distribution assembly 400 can be limited, the flow distribution block 300 or the flow distribution assembly 400 is positioned. It can be understood that through the setting of the positioning pin 360, the fixing of the flow distribution block 300 and the flow distribution assembly 400 can be realized, and through the setting of multiple positioning holes 450, the relative position of the flow distribution assembly 400 and the flow distribution block 300 can be adjusted, so as to realize the flow distribution. It should be noted that when the flow distribution block 300 is fixed to the box body 800, the flow distribution assembly 400 can be fixed to the flow distribution block 300 through the positioning pin 360; when the flow distribution assembly 400 is fixed to the box body 800, the flow distribution block 300 can be fixed to the flow distribution assembly 400 through the positioning pin. In particular, when the flow distribution assembly 400 is fixed to the flow distribution block, the structural stability of the two can be further guaranteed, and the stress concentration structure damage caused by vibration and the like can be avoided. Further, the smaller the spacing between the positioning holes 450 and the more the number of positioning holes 450, the higher the adjustment accuracy, and the number of positioning holes 450 and the spacing between the positioning holes 450 can be set as required.

[0055] Please refer to Figure 4 In some embodiments, the flow distribution plug 430 is internally provided with a cavity 434, the end of the flow distribution plug 430 away from the connecting rod 420 is provided with a water outlet hole 435 in communication with the cavity 434, and part of the side surface of the flow distribution plug 430 is provided with a water inlet hole 436. When the flow distribution plug 430 is at least partially located in the connecting cavity 350, the cooling liquid 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 hole 435, and the flow distribution plug 430 can rotate in the connecting cavity 350 to adjust the flow 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 multiple water inlet holes 436 are spaced apart along the circumference of the flow distribution plug 430; when the flow distribution plug 430 is at least partially located in the connecting cavity 350, the cooling liquid 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 surface of the flow distribution plug 430 which is not provided with a water inlet hole 436 (i.e. the first plugging surface 432) plugging the second flow channel 320, so that the cooling liquid can only flow to the first flow channel 310. At this time, rotating the flow distribution plug 430 can adjust the number of liquid inlet pipes 330 corresponding to the water inlet hole 436, i.e. allowing the first plugging surface 432 to partially block the liquid inlet pipe 330, so as to independently adjust the flow size of the first flow channel 310, at this time, the distribution range of the multiple water inlet holes 436 in the circumference of the flow distribution plug 430 is less than or equal to one half, as shown in Figure 4 .

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

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

[0059] In some embodiments, the number of second cold plates 200 is multiple, and multiple second cold plates are arranged at intervals along the second direction x, one end of each second cold plate 200 is communicated with the communication part 210, and the cooling device further comprises a shunt pipe 500, a collecting pipe 600 and a collecting block 700. The shunt pipe 500 is communicated with multiple communication parts 210 at the same time, the collecting pipe 600 is communicated with multiple communication parts 210 at the same time, the shunt block 300 is arranged on the shunt pipe 500, and the second flow channel 320 is communicated with the shunt pipe 500, so as to supply liquid to multiple second cold plates 200 through the second flow channel 320. The collecting block 700 is arranged on the collecting pipe 600; as Figure 8As shown, the collecting block 700 is in communication with the first cold plate 100 and the second cold plate 200 respectively to realize the outflow of the cooling liquid. The third flow channel 710 is arranged in the collecting block 700 and is in communication with the collecting pipe 600 to realize the communication with the second cold plate 200. Specifically, the third flow channel 710 can be in communication with the collecting pipe 600 and the communication part 210 respectively, so that the cooling liquid flows out from the communication part 210 and the collecting pipe 600 to the collecting block 700. The first flow channel 310 and the third flow channel 710 are in communication with the water inlet and the water outlet of the first cold plate 100 respectively. Specifically, the connecting hole 730 in communication with the third flow channel 710 is arranged on the collecting block 700, and the connecting hole 730 is used to communicate with the water outlet of the first cold plate 100, so that the cooling liquid of the first cold plate 100 flows to the third flow channel 710. Specifically, the connecting hole 730 can be in communication with the water outlet of the first cold plate 100 through the connecting pipe (not shown). The liquid outlet pipe 720 in communication with the third flow channel 710 is also arranged on the collecting block 700, so that the cooling liquid of the first cold plate 100 and the second cold plate 200 flows out. Through the arrangement of the collecting block 700, the liquid outflow of the first cold plate 100 and the second cold plate 200 can be realized at the same time, the structure is simplified, the space occupation is reduced, and the space utilization rate is improved.

[0060] When the cooling liquid is introduced through the liquid inlet pipe 330, the cooling liquid can flow into the first cold plate 100 from the first flow channel 310, the water inlet of the first cold plate 100, and then flow out from the water outlet of the first cold plate 100 to the third flow channel 710 through the connecting hole 730, and finally be discharged through the liquid outlet pipe 720 in communication with the third flow channel 710. In addition, the cooling liquid can also flow into the collecting pipe 500 from the second flow channel 320, and then flow into the plurality of second cold plates 200 through the plurality of communication parts 210 in communication with the collecting pipe 500, and then flow into the collecting pipe 600 through the plurality of communication 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 collecting block 700 and then be discharged. In some embodiments, the end of the movable rod 410 away from the connecting rod 420 is provided with a driving member (not shown), 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 body 800 to realize automatic control.

[0061] The driving member can be an electric push rod connected with the movable rod 410 to drive the movable rod 410 to move in the movable cavity 340, so that the movement precision of the shunt assembly 400 is higher.

[0062] The battery pack 10 further comprises a BMS system, which controls the operation of the electric push rod by collecting the temperature of the battery 900, so that the electric push rod pushes the shunt plug 430 to move in the first direction z to realize precise shunting effect.

[0063] In some embodiments, the movable rod 410 is provided with a plurality of first sealing rings 411 at intervals along the length of the movable rod 410.

[0064] The first sealing ring 411 is made of DPDM silicone rubber or the like. By providing a plurality of grooves 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 cooling liquid is less likely to flow in the movable cavity 340, reducing the loss of cooling liquid.

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

[0066] The embodiments of the present application also provide an electric device, which includes the battery pack 10 described above. For example, the electric device can be a vehicle, a ship, a spacecraft, etc. The vehicle can be a fuel automobile or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, etc. The embodiments of the present application do not specially limit the above-mentioned electric device.

[0067] The technical effects of the cooling device, the battery pack 10 and the electric device provided by the embodiments of the present application at least include: the flow adjustment 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 adjustment of the first cold plate 100 and the second cold plate 200, facilitate the expansion of the control strategy, realize precise heat exchange, improve the heat exchange efficiency and heat exchange effect; the first cold plate 100 is directly in contact with the busbar, which can quickly dissipate heat and reduce the cross-sectional area of the busbar, thereby reducing the cost and weight; the electric push rod can be used to push the shunt plug 430 to move, so as to reasonably distribute the first cold plate 100 and the second cold plate 200, and realize reasonable use of efficiency.

[0068] To sum up, the embodiment of the application provides a cooling device, a battery pack 10 and an electric equipment. The cooling liquid is introduced through the liquid inlet pipe 330. In this process, the movable shunt assembly 400 is used to make the cooling liquid in the liquid inlet pipe 330 flow into at least one of the first flow channel 310 and the second flow channel 320. The cooling liquid in the first flow channel 310 can flow into the internal flow channel of the first cold plate 100, and the cooling liquid in the second flow channel 320 can flow into the internal flow channel of the second cold plate 200. Therefore, the cooling liquid can be reasonably shunted, and the efficiency can be reasonably utilized.

[0069] The above is only a specific embodiment of the application, but the protection scope of the application is not limited thereto. Any changes or replacements that can be easily thought of by those skilled in the art within the technical range disclosed in the application should be covered in the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A cooling device, characterized in that, The system includes a first cold plate (100), a second cold plate (200), a flow divider block (300), and a flow divider assembly (400). The flow divider block (300) has a first flow channel (310) extending in a first direction and a second flow channel (320) extending in a second direction, 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 flow divider block (300) is provided with an inlet pipe (330) corresponding to the first flow channel (310). The flow divider assembly (400) is movably disposed on the flow divider block (300) corresponding to the second flow channel (320). During the movement of the flow divider assembly (400), the coolant in the inlet pipe (330) can flow to at least one of the first flow channel (310) and the second flow channel (320). The flow divider block (300) has an internally connected movable cavity (340) and a connecting cavity (350). The movable cavity (340) is used for the flow divider assembly (400) to move. The connecting cavity (350) is located 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 movable cavity (340) extends along the first direction, and the diversion component (400) is capable of reciprocating along the first direction in the movable cavity (340), the connecting cavity (350) and the first flow channel (310) to adjust the flow rate in the first flow channel (310) and the second flow channel (320), wherein the first direction is perpendicular to the second direction; The diversion assembly (400) includes a movable rod (410), a connecting rod (420), and a diversion plug (430). The connecting rod (420) is connected between the movable rod (410) and the diversion plug (430). The diameter of the connecting rod (420) is smaller than the diameter of the second flow channel (320). The length of the diversion 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). The movable rod (410) is capable of moving within the movable cavity (340). The diversion plug (430) is provided with a first sealing surface (432) and a second sealing surface (433) that 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 diversion plug (430) moves to the connecting cavity (350), the first sealing surface (432) blocks the second flow channel (320) to guide the coolant in the inlet pipe (330) to the first flow channel (310). When the diversion plug (430) moves to the first flow channel (310), the second sealing surface (433) blocks the first flow channel (310) to guide the coolant in the inlet pipe (330) to the second flow channel (320). 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). When the second sealing surface (433) blocks the first flow channel (310), the connecting rod (420) spans the second flow channel (320) on the projection plane in the second direction. The diversion plug (430) is provided with an inclined guide surface (431) facing the inlet pipe (330).

2. The cooling device according to claim 1, characterized in that, The diverter plug (430) has a cavity (434) inside. The end of the diverter plug (430) away from the connecting rod (420) is provided with a water outlet (435) communicating with the cavity (434). A water inlet (436) is provided on a 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 (436) and flow to the first flow channel (310) through the water outlet (435). The diverter plug (430) can rotate in the connecting cavity (350) to adjust the flow rate guided to the first flow channel (310) and / or the second flow channel (320).

3. The cooling device according to claim 1, characterized in that, A positioning platform (440) is provided at one end of the movable rod (410) away from the connecting rod (420). Multiple 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 provided on the diverting block (300). The positioning pin (360) is used to cooperate with one of the positioning holes (450) to limit the position of the diverting block (300) or the diverting assembly (400).

4. The cooling device according to claim 1, characterized in that, The number of second cold plates (200) is multiple, and one end of each second cold plate (200) is connected to a connecting part (210). The cooling device also includes a distribution pipe (500), a collection pipe (600), and a collection block (700). The distribution pipe (500) is connected to multiple connecting parts (210) simultaneously, and the collection pipe (600) is connected to multiple connecting parts (210) simultaneously. The distribution block (300) is disposed on the distribution pipe (500), and the second flow channel (320) is connected to... The diversion pipe (500) is connected, the flow collector (700) is disposed on the flow collector (600), the flow collector (700) has a third flow channel (710) inside, the third flow channel (710) is connected to the flow collector (600), the flow collector (700) is provided with an outlet pipe (720) connected to the third flow channel (710), the first flow channel (310) and the third flow channel (710) are respectively connected to the inlet and outlet of the first cold plate (100).

5. A battery pack, characterized in that, The device includes a housing (800), a battery (900), and a cooling device as described in any one of claims 1-4. The first cold plate (100) is connected to the housing (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 disposed 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).

6. An electrical appliance, characterized in that, Includes the battery pack (10) as described in claim 5.

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