A liquid-cooled energy storage battery pack management device

Abstract

The present invention discloses a liquid-cooled energy storage battery pack management device, which includes a box bottom plate. A heat conduction plate is installed on the box bottom plate, and the heat conduction plate is used for installing battery modules. A liquid-cooling seat is installed at the bottom of the box bottom plate. An inlet water pipe and an outlet water pipe are respectively installed on both sides of the end of the liquid-cooling seat. The inlet water pipe conveys coolant into the liquid-cooling seat to exchange heat and cool the battery modules, and the heat-exchanged coolant is discharged through the outlet water pipe. The liquid-cooling seat includes a flow channel plate, and an installation plate is movably arranged on the top of the flow channel plate; flow channels are formed on the flow channel plate, connection grooves are formed on the flow channel plate, and positioning holes are formed in the flow channel plate corresponding to the connection grooves. It specifically relates to the field of battery management. By increasing the coolant inflow, first increasing the coolant flow rate, separating the flow channel plate from the installation plate, then increasing the height of the flow channels, further slowing down the coolant flow rate until balance is maintained, at this time both the flow rate and the flow volume increase, thereby taking away more heat and improving the cooling efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and more specifically, the present invention relates to a liquid-cooled energy storage battery pack management device. Background Art

[0002] With the rapid development of the wind power and photovoltaic industries, energy storage has largely solved the problems of randomness and volatility of new energy power generation, playing a role of "filling valleys with peaks"; and the performance of energy storage depends to a large extent on the performance of the battery. Energy storage batteries apply electrochemical principles for charging and discharging operations. The direct conversion of chemical energy into electrical energy is the result of spontaneous oxidation, reduction and other chemical reactions inside the battery; heat is generated during this chemical reaction process.

[0003] The optimal operating temperature of the battery is between 25°C and 35°C. The battery is greatly affected by temperature. Safety hazards will occur when the battery is at too high or too low temperatures. For example, too high a temperature will cause the battery to have a thermal runaway phenomenon, and too low a temperature will cause damage to the internal structure of the battery or a decrease in battery performance, which will affect the charge and discharge cycle times of the battery and reduce the service life of the battery; at the same time, too high a temperature will also cause a thermal runaway phenomenon, leading to safety problems; therefore, thermal management of the battery in the energy storage industry is particularly important.

[0004] With the increase in the charge and discharge rate of the energy storage system, the heat dissipation power consumption of the liquid-cooled inverter is also increasing. Timely and effectively removing the heat dissipation power consumption of the battery pack is the premise to ensure the reliable and stable operation of the battery pack.

[0005] Currently, the energy storage industry's battery thermal management systems usually use air cooling or liquid cooling. The air-cooled thermal management system in the energy storage industry is generally used for small area energy density and average adaptability, while the liquid-cooled system can be adapted to both large and small area energy densities.

[0006] However, the flow channel cross-section height of the existing battery liquid-cooled system is fixed and unchanged. The fixed-height flow channel cannot adapt to the heat generation situation of the battery under different working conditions. For example, under high load, the battery will generate more heat. Due to the unchangeable flow channel height, it is impossible to improve the cooling efficiency by adjusting the flow channel height, and the flexibility is poor. Summary of the Invention

[0007] The liquid-cooled energy storage battery pack management device provided by the present invention aims to solve the problem that in the existing battery liquid-cooled system, due to the unchangeable flow channel height, it is impossible to improve the cooling efficiency by adjusting the flow channel height under high load.

[0008] To achieve the above object, the present invention provides the following technical solution: A liquid-cooled energy storage battery pack management device, including a box bottom plate, a heat conduction plate is installed on the box bottom plate, and the heat conduction plate is used to install the battery module. A liquid-cooling seat is installed at the bottom of the box bottom plate. Water inlet pipes and water outlet pipes are respectively installed on both sides of the end of the liquid-cooling seat. The water inlet pipe conveys coolant into the liquid-cooling seat to exchange heat and cool the battery module, and the heat-exchanged coolant is discharged through the water outlet pipe. The liquid-cooling seat includes a flow channel plate, and a mounting plate is movably arranged on the top of the flow channel plate; flow channels are opened on the flow channel plate, connection grooves are opened on the flow channel plate, positioning holes are opened at the positions of the flow channel plate corresponding to the connection grooves, and a flow blocking block is arranged in the middle of the flow channel plate; connection blocks are fixedly arranged on the mounting plate, the connection blocks are arranged opposite to the connection grooves, positioning columns are fixedly arranged on the connection blocks, and the positioning columns are slidably arranged inside the corresponding positioning holes. A sealing member is fixedly arranged between the mounting plate corresponding to the connection block and the inner side wall of the flow channel plate.

[0009] In a preferred embodiment, a flow blocking block is installed inside the flow channel, and a buffer mechanism is installed on the flow blocking block. The buffer mechanism includes a fixed component and a movable component. A buffer component is arranged between the fixed component and the movable component. The fixed component is fixedly installed on the flow blocking block, and the movable component is fixedly connected to the mounting plate. When the mounting plate approaches or moves away from the flow blocking block, the speed of the mounting plate approaching or moving away from the flow blocking block is slowed down by the buffer component.

[0010] In a preferred embodiment, the fixed component is a cylinder body, the movable component is a piston rod, and one end of the piston rod is slidably arranged inside the cylinder body. The buffer component is a connecting spring, and both ends of the connecting spring are respectively fixed to the cylinder body and the end of the piston rod away from the cylinder body.

[0011] In a preferred embodiment, a buffer cavity is arranged inside the cylinder body, and the buffer cavity is filled with damping liquid. An elastic member is arranged inside the buffer cavity, and the elastic member is located below one end of the piston rod.

[0012] In a preferred embodiment, a buffer groove is opened on the flow blocking block, the buffer mechanism is installed inside the buffer groove, a partition groove is opened on the flow blocking block, and two groups of partition grooves are arranged on both sides corresponding to the buffer groove. A partition belt is arranged inside the partition groove, and both ends of the partition belt are respectively fixed to the bottom of the mounting plate and the inner wall of the partition groove.

[0013] In a preferred embodiment, a backflow blocking mechanism is installed inside the flow channel. Several groups of backflow blocking mechanisms are arranged along the direction of the flow channel. When the mounting plate approaches the flow channel plate, the backflow blocking mechanism is turned over to block the reverse flow of the coolant.

[0014] In a preferred embodiment, the recoil blocking mechanism includes a support component and a flipping component. The support component is rotatably connected to the flipping component. The support component is fixed to the bottom wall of the flow channel, and the height of the support component is less than the minimum height of the flow channel. The minimum height of the flow channel is the height of the flow channel when the flow channel plate and the mounting plate are at the minimum distance from each other.

[0015] In a preferred embodiment, the support component is a fixed block, and the flipping component is a blocking plate. The fixed blocks are connected by a connecting shaft, and a buffer torsion spring is sleeved on the connecting shaft. The two ends of the buffer torsion spring are respectively fixed to the connecting shaft and the fixed block. An arc surface is provided at one end of the bottom of the blocking plate.

[0016] In a preferred embodiment, a movable limit piece is fixedly provided at one end of the blocking plate away from the arc surface, and a fixed limit piece is fixedly provided on the fixed block. When the blocking plate is flipped to the maximum angle, the fixed limit piece abuts against and limits the movable limit piece.

[0017] In a preferred embodiment, a box cover is detachably installed on the bottom plate of the box. Heat dissipation strips are fixedly provided on the outer side of the box cover, and a heat conducting plate is fixedly provided inside the box cover, and the heat conducting plate is located above the battery module.

[0018] The beneficial effects of the present invention are as follows:

[0019] By increasing the amount of coolant entering, the present invention first increases the flow rate of the coolant, separates the flow channel plate from the mounting plate, then the height of the flow channel increases, further slowing down the flow rate of the coolant until balance is maintained. At this time, both the flow rate and the flow volume increase, thereby taking away more heat and improving the cooling efficiency.

[0020] When the vibration generated by the external installation structure is transmitted to the flow channel plate, the flow channel plate moves relative to the mounting plate. Under the guiding and positioning of the positioning posts and positioning holes, the moving direction of the flow channel plate is the up and down direction. When the flow channel plate is separated from the mounting plate, the height of the flow channel changes. Since there is coolant flowing in the flow channel, the coolant is squeezed and consumes part of the vibration energy, so that the remaining vibration energy will not be transmitted to the mounting plate and the bottom plate of the box. At the same time, the relative movement between the flow channel plate and the mounting plate will also accelerate the flow rate of the coolant, thereby improving the heat dissipation efficiency.

[0021] Through the flow and compression of the damping liquid inside the buffer cavity, the energy brought by the downward impact of the mounting plate is gradually consumed, thereby slowing down the speed of the mounting plate approaching the flow channel plate, reducing the vibration amplitude of the mounting plate in the moving state, being beneficial to improving the stability of the flow channel plate and the mounting plate, and avoiding violent collision or pulling separation due to the rapid movement between the flow channel plate and the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0023] Figure 2 This is a schematic diagram of the installation of the bottom plate of the box of the present invention.

[0024] Figure 3 This is a schematic diagram of the structure of the liquid cooling seat of the present invention.

[0025] Figure 4 This is a schematic diagram of the structure of the flow channel plate of the present invention.

[0026] Figure 5 This is a schematic diagram of the end face structure of the mounting plate of the present invention.

[0027] Figure 6 This is a schematic diagram of the end face structure of the flow channel of the present invention.

[0028] Figure 7 This is a schematic diagram of the end structure of the flow blocking block of the present invention.

[0029] Figure 8 This is a schematic diagram of the composition structure of the buffer mechanism of the present invention.

[0030] Figure 9 This is a schematic diagram of the composition structure of the backflow blocking mechanism of the present invention.

[0031] Figure 10 This is a schematic diagram of the box cover structure of the present invention.

[0032] Figure 11 This is a schematic diagram of the overall composition process of the present invention.

[0033] Reference numerals are: 1, bottom plate of the box; 11, heat conducting plate; 12, battery module; 2, box cover; 21, heat dissipation strip; 22, heat conducting disc; 3, liquid cooling seat; 31, flow channel plate; 311, flow channel; 312, connecting groove; 313, positioning hole; 314, flow blocking block; 3141, buffer groove; 3142, partition groove; 3143, partition band; 32, mounting plate; 321, connecting block; 322, positioning post; 323, seal; 4, water inlet pipe; 5, water outlet pipe; 6, buffer mechanism; 61, cylinder body; 611, buffer cavity; 612, elastic member; 62, piston rod; 63, connecting spring; 7, backflow blocking mechanism; 71, fixed block; 711, connecting shaft; 712, fixed limiting piece; 72, blocking plate; 721, arc surface; 722, movable limiting piece. Detailed implementation manners

[0034] The following further describes the present application in detail with reference to the drawings. It is necessary to point out here that the following specific implementation manners are only used to further illustrate the present application and cannot be understood as limiting the protection scope of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application according to the above application content.

[0035] Referring to the attached drawings of the specification Figures 1 to 6 , a liquid-cooled energy storage battery pack management device, including a box bottom plate 1, a heat conduction plate 11 is installed on the box bottom plate 1, and the heat conduction plate 11 is used to install the battery module 12. A liquid cooling seat 3 is installed at the bottom of the box bottom plate 1. Water inlet pipes 4 and outlet pipes 5 are respectively installed on both sides of the end of the liquid cooling seat 3. The water inlet pipe 4 conveys cooling liquid into the liquid cooling seat 3 to exchange heat and cool down the battery module 12, and the heat-exchanged cooling liquid is discharged through the outlet pipe 5. The liquid cooling seat 3 includes a flow channel plate 31, and a mounting plate 32 is movably arranged on the top of the flow channel plate 31; a flow channel 311 is opened on the flow channel plate 31, a connecting groove 312 is opened on the flow channel plate 31, a positioning hole 313 is opened on the flow channel plate 31 corresponding to the connecting groove 312, and a flow dividing block 314 is arranged in the middle of the flow channel plate 31; a connecting block 321 is fixedly arranged on the mounting plate 32, the connecting block 321 is arranged opposite to the connecting groove 312, a positioning column 322 is fixedly arranged on the connecting block 321, and the positioning column 322 is slidably arranged inside the corresponding positioning hole 313. A sealing member 323 is fixedly arranged between the mounting plate 32 corresponding to the connecting block 321 and the inner side wall of the flow channel plate 31.

[0036] It should be noted that the cross-sections of the positioning hole 313 and the positioning column 322 are both T-shaped, so that the flow channel plate 31 and the mounting plate 32 are movably connected. The sealing member 323 is an elastic sealing film, and the sealing member 323 is annularly laid along the inner wall of the mounting plate 32, which can seal the gap between the connecting groove 312 and the connecting block 321. Both ends of the flow channel 311 are respectively communicated with the water inlet pipe 4 and the outlet pipe 5.

[0037] In this embodiment, the implementation scenario is specifically as follows: first, the battery module 12 is installed on the heat conducting plate 11, and then the liquid cooling seat 3 is installed on the bottom of the box bottom plate 1. At this time, the mounting plate 32 is in close contact with the heat conducting plate 11 and conducts heat. The cooling liquid is transported to the inside of the liquid cooling seat 3 through the water inlet pipe 4, so that the cooling liquid flows along the flow channel 311. During the flow of the cooling liquid, the battery module 12 is heat exchanged and cooled. The cooling liquid after heat exchange is discharged through the water outlet pipe 5. In this embodiment, the liquid cooling seat 3 is designed to be split, that is, the flow channel plate 31 and the mounting plate 32 are sealed and slidably connected up and down, so that the flow channel 311 formed between the flow channel plate 31 and the mounting plate 32 can change the height. The flow channel plate 31 is fixedly connected to the external mounting structure, and the mounting plate 32 is fixedly connected to the box bottom plate 1 carrying the battery module 12. When the battery is under high load, the amount of cooling liquid entering is increased, the cooling liquid flow rate is first increased, and the flow channel plate 31 is separated from the mounting plate 32, and then the height of the flow channel 311 is increased, which further slows down the cooling. The cooling liquid flow speed is increased until a balance is maintained. At this time, the flow speed and flow rate are increased, thereby taking away more heat and improving the cooling efficiency. The height of the flow channel 311 in the prior art remains unchanged. Only by increasing the coolant and accelerating the flow speed, a cooling "bottleneck" line will appear due to insufficient flow of the coolant. It is difficult to meet the demand in an environment where a sharp cooling is required. When the vibration generated by the external mounting structure is transmitted to the flow channel plate 31, the flow channel plate 31 moves relative to the mounting plate 32. Under the guidance and positioning of the positioning column 322 and the positioning hole 313, the movement direction of the flow channel plate 31 is the up and down direction. When the flow channel plate 31 is away from the mounting plate 32, the height of the flow channel 311 changes. Since coolant flows in the flow channel 311, the coolant is squeezed to consume part of the vibration energy, and the residual vibration energy will not be transmitted to the mounting plate 32 and the bottom plate 1 of the box. At the same time, the relative movement of the flow channel plate 31 and the mounting plate 32 will also accelerate the flow rate of the coolant, thereby improving the heat dissipation efficiency.

[0038] Refer to the instruction manual Figure 7 and Figure 8 When the flow channel plate 31 and the mounting plate 32 are frequently moving toward or away from each other, strong inertia will be generated between the flow channel plate 31 and the mounting plate 32 due to the rapid movement, causing the flow channel plate 31 and the mounting plate 32 to collide violently or be pulled apart, thereby affecting their service life.

[0039] In order to solve this problem, the following technical solution is also provided: a flow partition block 314 is installed inside the flow channel 311, and a buffer mechanism 6 is installed on the flow partition block 314. The buffer mechanism 6 includes a fixed component and a movable component. A buffer component is provided between the fixed component and the movable component. The fixed component is fixedly installed on the flow partition block 314, and the movable component is fixedly connected to the mounting plate 32. When the mounting plate 32 approaches or moves away from the flow partition block 314, the buffer component slows down the speed of the mounting plate 32 approaching or moving away from the flow partition block 314.

[0040] It should be noted that the flow-blocking block 314 divides the flow channel 311 into a continuous small flow channel in a loop shape, so that a plurality of small flow channels are connected end to end.

[0041] Further, the fixed component is a cylinder 61, the movable component is a piston rod 62, one end of the piston rod 62 is slidably arranged inside the cylinder 61, the buffer component is a connecting spring 63, and both ends of the connecting spring 63 are respectively fixed to the cylinder 61 and one end of the piston rod 62 away from the cylinder 61.

[0042] It should be noted that when the mounting plate 32 drives the piston rod 62 to press down, the connecting spring 63 is compressed to slow down the downward movement speed of the mounting plate 32.

[0043] Still further, a buffer cavity 611 is provided inside the cylinder 61, the buffer cavity 611 is filled with damping liquid, an elastic member 612 is provided inside the buffer cavity 611, and the elastic member 612 is located below one end of the piston rod 62.

[0044] It should be noted that one end of the piston rod 62 located inside the buffer cavity 611 is provided with a piston block, there is damping liquid above and below the piston block, and the elastic member 612 is located below the piston block.

[0045] Still further, a buffer groove 3141 is formed on the flow-blocking block 314, the buffer mechanism 6 is installed inside the buffer groove 3141, a partition groove 3142 is formed on the flow-blocking block 314, two groups of partition grooves 3142 are arranged corresponding to both sides of the buffer groove 3141, a partition belt 3143 is provided inside the partition groove 3142, and both ends of the partition belt 3143 are respectively fixedly connected to the bottom of the mounting plate 32 and the inner wall of the partition groove 3142.

[0046] It should be noted that the partition belt 3143 can be the same as the seal 323 and adopt an elastic sealing film. The partition belts 3143 on both sides are used to separate adjacent small flow channels and block the coolant from entering the buffer groove 3141.

[0047] In this embodiment, the implementation scenario is specifically as follows: The downward impact force of the mounting plate 32 acts on the piston rod 62 and is transmitted to the cylinder body 61 through the connecting spring 63. The connecting spring 63 plays a preliminary buffering role. The piston rod 62 continues to move downward, and the impact force is transmitted to the damping liquid at its bottom through the piston block. The damping liquid flows and compresses the elastic member 612 inside the buffer chamber 611. Frictional resistance is generated between the liquid molecules of the damping liquid, hindering its flow, and the impact energy is converted into heat energy and dissipated. At the same time, the elastic member 612 is also compressed, absorbing and dispersing part of the impact energy. As the damping liquid inside the buffer chamber 611 flows and compresses, the energy brought by the downward impact of the mounting plate 32 is gradually consumed, thereby slowing down the speed of the mounting plate 32 approaching the flow channel plate 31, reducing the vibration amplitude of the mounting plate 32 in the moving state, being beneficial to improving the stability of the flow channel plate 31 and the mounting plate 32, and avoiding violent collisions or pulling separations due to the rapid movement between the flow channel plate 31 and the mounting plate 32.

[0048] Refer to the attached drawings of the specification Figure 6 and Figure 9 , when the mounting plate 32 approaches the flow channel plate 31, the height of the flow channel 311 will decrease. At this time, the coolant in the middle will have a reverse flow phenomenon due to the decrease in the height of the flow channel 311, resulting in the inability of the coolant entering later to flow normally.

[0049] To solve this problem, the following technical solution is also provided: An anti-reflux blocking mechanism 7 is installed inside the flow channel 311. A number of groups of the anti-reflux blocking mechanism 7 are arranged along the direction of the flow channel 311. When the mounting plate 32 approaches the flow channel plate 31, the anti-reflux blocking mechanism 7 flips to block the reverse flow of the coolant.

[0050] Furthermore, the anti-reflux blocking mechanism 7 includes a support component and a flipping component. The support component and the flipping component are rotatably connected. The support component is fixed to the bottom wall of the flow channel 311, and the height of the support component is less than the minimum height of the flow channel 311. The minimum height of the flow channel 311 is the height of the flow channel 311 when the flow channel plate 31 and the mounting plate 32 are at the minimum distance.

[0051] It should be noted that when the flipping component is at the maximum flipping angle, the height of the flipping component is also less than the minimum height of the flow channel 311.

[0052] Furthermore, the support component is a fixed block 71, and the flipping component is a blocking plate 72. The fixed blocks 71 are connected by a connecting shaft 711. A buffer torsion spring is sleeved on the connecting shaft 711, and both ends of the buffer torsion spring are fixed to the connecting shaft 711 and the fixed block 71 respectively. An arc surface 721 is provided at one end of the bottom of the blocking plate 72.

[0053] It should be noted that there is a reflux port between the end of the arc surface 721 away from the fixed block 71 and the bottom wall of the flow channel 311. When the arc surface 721 is turned upwards, it needs to overcome the resistance of the buffer torsion spring.

[0054] Furthermore, a movable limit piece 722 is fixedly provided at one end of the blocking plate 72 away from the arc surface 721, and a fixed limit piece 712 is fixedly provided on the fixed block 71. When the blocking plate 72 is turned to the maximum angle, the fixed limit piece 712 abuts against and limits the movable limit piece 722.

[0055] It should be noted that the fixed limit piece 712 is fixed at the end of the fixed block 71, and the movable limit piece 722 is fixed on the outer side of the blocking plate 72.

[0056] In this embodiment, the implementation scenario is specifically as follows: when the coolant flows backward, the coolant flushes into the reflux port at one end of the arc surface 721, causing the blocking plate 72 to turn upwards. The buffer torsion spring increases the resistance when the arc surface 721 turns upwards to offset the impact force of the coolant reflux. By the abutting limit of the fixed limit piece 712 on the movable limit piece 722, it can be avoided that the blocking plate 72 turns to block the flow channel 311. Also, the width of the blocking plate 72 can be designed to be smaller than the width of the flow channel 311. By the turning of the blocking plate 72 to offset the impact force of the reverse flow of the coolant, it can be avoided that the reverse flow of the coolant in the middle affects the normal flow of the coolant entering later.

[0057] Refer to the attached drawings of the specification Figure 10 and Figure 11 , a box cover 2 is detachably installed on the box bottom plate 1. Heat dissipation strips 21 are fixedly provided on the outer side of the box cover 2, and a heat conduction plate 22 is fixedly provided inside the box cover 2, and the heat conduction plate 22 is located above the battery module 12.

[0058] It should be noted that the heat of the battery pack can be effectively dissipated through the heat dissipation strips 21, and the heat inside the battery pack can be absorbed and conducted through the heat conduction plate 22 to conduct the heat of the battery pack out.

[0059] The above embodiments only represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention.

Claims

1. A liquid-cooled energy storage battery pack management device, comprising a box bottom plate (1), a heat conduction plate (11) is installed on the box bottom plate (1), and the heat conduction plate (11) is used for installing a battery module (12). A liquid-cooling seat (3) is installed at the bottom of the box bottom plate (1). An inlet water pipe (4) and an outlet water pipe (5) are respectively installed on both sides of the end of the liquid-cooling seat (3). The inlet water pipe (4) conveys cooling liquid into the liquid-cooling seat (3) to exchange heat and cool down the battery module (12), and the heat-exchanged cooling liquid is discharged through the outlet water pipe (5). It is characterized in that: The liquid cooling base (3) includes a flow channel plate (31), and a mounting plate (32) is movably arranged on the top of the flow channel plate (31); A flow channel (311) is formed on the flow channel plate (31), a connecting groove (312) is formed on the flow channel plate (31), a positioning hole (313) is formed in the flow channel plate (31) corresponding to the connecting groove (312), and a flow blocking block (314) is arranged in the middle of the flow channel plate (31); A connecting block (321) is fixedly arranged on the mounting plate (32), the connecting block (321) is arranged opposite to the connecting groove (312), a positioning column (322) is fixedly arranged on the connecting block (321), and the positioning column (322) is slidably arranged inside the corresponding positioning hole (313). A sealing member (323) is fixedly arranged between the mounting plate (32) corresponding to the connecting block (321) and the inner side wall of the flow channel plate (31); A flow blocking block (314) is installed inside the flow channel (311), a buffer mechanism (6) is installed on the flow blocking block (314), the buffer mechanism (6) includes a fixed component and a movable component, a buffer component is arranged between the fixed component and the movable component, the fixed component is fixedly installed on the flow blocking block (314), the movable component is fixedly connected with the mounting plate (32), and when the mounting plate (32) approaches or moves away from the flow blocking block (314), the speed of the mounting plate (32) approaching or moving away from the flow blocking block (314) is slowed down by the buffer component; The fixed component is a cylinder body (61), the movable component is a piston rod (62), and one end of the piston rod (62) is slidably arranged inside the cylinder body (61). The buffer component is a connecting spring (63), and both ends of the connecting spring (63) are respectively fixed to the cylinder body (61) and the end of the piston rod (62) far away from the cylinder body (61); A buffer cavity (611) is arranged inside the cylinder body (61), and the buffer cavity (611) is filled with damping liquid. An elastic member (612) is arranged inside the buffer cavity (611), and the elastic member (612) is located below one end of the piston rod (62).

2. The liquid-cooled energy storage battery pack management device according to claim 1, wherein: A buffer groove (3141) is formed on the flow blocking block (314), the buffer mechanism (6) is installed inside the buffer groove (3141). A partition groove (3142) is formed on the flow blocking block (314), and two groups of partition grooves (3142) are arranged on both sides corresponding to the buffer groove (3141). A partition belt (3143) is arranged inside the partition groove (3142), and both ends of the partition belt (3143) are respectively fixed to the bottom of the mounting plate (32) and the inner wall of the partition groove (3142).

3. The liquid-cooled energy storage battery pack management device according to claim 2, wherein: A backflow blocking mechanism (7) is installed inside the flow channel (311), and several groups of backflow blocking mechanisms (7) are arranged along the direction of the flow channel (311). When the mounting plate (32) approaches the flow channel plate (31), the backflow blocking mechanism (7) is turned over to block the reverse flow of the coolant.

4. The liquid-cooled energy storage battery pack management device according to claim 3, wherein: The recoil blocking mechanism (7) includes a support component and a flipping component. The support component is rotatably connected to the flipping component. The support component is fixed to the bottom wall of the flow channel (311), and the height of the support component is less than the minimum height of the flow channel (311). The minimum height of the flow channel (311) is the height of the flow channel (311) when the minimum distance is between the flow channel plate (31) and the mounting plate (32).

5. The liquid-cooled energy storage battery pack management device according to claim 4, characterized in that: The support component is a fixed block (71), and the flipping component is a blocking plate (72). The fixed block (71) is connected to the fixed block (71) through a connecting shaft (711). A buffer torsion spring is sleeved on the connecting shaft (711), and both ends of the buffer torsion spring are fixed to the connecting shaft (711) and the fixed block (71) respectively. An arc surface (721) is provided at one end of the bottom of the blocking plate (72).

6. The liquid-cooled energy storage battery pack management device according to claim 5, wherein: A movable limiting piece (722) is fixedly provided at one end of the blocking plate (72) away from the arc surface (721), and a fixed limiting piece (712) is fixedly provided on the fixed block (71). When the blocking plate (72) is flipped to the maximum angle, the fixed limiting piece (712) abuts against and limits the movable limiting piece (722).

7. The liquid-cooled energy storage battery pack management device according to claim 6, characterized in that: A box cover (2) is detachably installed on the box bottom plate (1). Heat dissipation strips (21) are fixedly provided on the outer side of the box cover (2). A heat conduction plate (22) is fixedly provided inside the box cover (2), and the heat conduction plate (22) is located above the battery module (12).

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