Electric energy storage device and control method thereof

Abstract

The invention discloses an electric energy storage device and a control method thereof, and belongs to the technical field of energy storage. The charging and discharging control module is fixedly installed at the bottom in the box body, the inner wall of the box body is fixedly connected with a partition plate, the charging and discharging control module is located below the partition plate, the partition plate is fixedly connected with an installation assembly through a supporting straight plate, and the two liquid-cooled battery packs are symmetrically and fixedly installed on the installation assembly; the top in the box body is fixedly connected with an adjustable liquid supply assembly for heat dissipation of the liquid-cooled battery pack; the adjustable liquid supply assembly comprises a synchronous driving assembly, a liquid circulation reversing assembly, an electromagnetic valve, a liquid inlet assembly, a liquid outlet assembly, a first pipeline, a second pipeline, a third pipeline, a second liquid inlet pipe and a fourth pipeline, and one end of the first pipeline and one end of the second pipeline are fixedly connected with the two ends of a cooling channel of the liquid-cooled battery pack. The device can realize low-flow balanced heat dissipation treatment, and is energy-saving and environment-friendly.

Description

Technical Field

[0001] The present invention relates to the field of energy storage technology, and in particular to an electric energy storage device and a control method thereof. Background Art

[0002] Energy storage devices generally include a plurality of stacked liquid-cooled battery packs. The bottom of the housing of each liquid-cooled battery pack is generally formed with an opening and a connection terminal is provided at the opening.

[0003] Chinese patent CN217822991U discloses a heat dissipation device for liquid-cooled energy storage equipment and the liquid-cooled energy storage equipment. The heat dissipation device comprises a housing, a liquid cooling system, and a fan assembly. The housing houses an electrical compartment and a liquid-cooled battery pack compartment. The liquid cooling system cools the liquid-cooled battery pack within the compartment. The fan assembly is disposed between the compartment and the electrical compartment to form a circulating air path. The cold airflow within the liquid-cooled battery pack compartment cools the electrical equipment within the compartment, thereby reducing heat dissipation costs.

[0004] The coolant flow direction of the above patent remains unchanged, and the temperature of the coolant outlet branch is higher than that of the coolant inlet branch. When the flow rate is low, the heat dissipation effect of the part of the liquid-cooled battery pack close to the inlet branch is better than that of the part of the liquid-cooled battery pack close to the outlet branch. In order to achieve the above phenomenon and ensure the overall balanced heat dissipation of the liquid-cooled battery pack, the flow rate of the chiller needs to be increased to quickly circulate and take away the heat, but this method has high energy consumption and is not conducive to practical use.

[0005] Based on this, the present invention designs an electric energy storage device and a control method thereof to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides an electric energy storage device and a control method thereof.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] An electric energy storage device includes a box, a liquid-cooled battery pack, and a charge and discharge control module;

[0009] The front end of the box is connected to a door panel through a hinge;

[0010] Side holes are opened on the left and right side walls of the box body, and the box body is connected to the side panels at the outer ends of the side holes through hinges and locks;

[0011] The charge and discharge control module is fixedly installed at the bottom of the box;

[0012] A partition is fixedly connected to the inner wall of the box, and the charge and discharge control module is located below the partition. The partition is fixedly connected to multiple groups of mounting components for supporting liquid-cooled battery packs through supporting straight plates. Two groups of liquid-cooled battery packs are symmetrically fixed on the mounting components.

[0013] A regulated liquid supply assembly for dissipating heat from the liquid-cooled battery pack is fixedly connected to the top of the box;

[0014] The adjustable liquid supply assembly includes a synchronous drive assembly, a liquid circulation reversing assembly, a solenoid valve, a liquid inlet assembly, a liquid outlet assembly, a first pipe, a second pipe, a third pipe, a second liquid inlet pipe and a fourth pipe. One end of the first pipe and the second pipe is fixedly connected to the two ends of the cooling channel of the liquid-cooled battery pack, the other end of the second pipe and the first pipe is fixedly connected to the through hole on the inside of the liquid circulation reversing assembly, one end of the third pipe, the second liquid inlet pipe and the fourth pipe is fixedly connected to the through hole on the outside of the liquid circulation reversing assembly, and the second liquid inlet pipe is located between the third pipe and the fourth pipe. Between the pipelines, the third pipeline and the fourth pipeline are connected to the liquid outlet assembly, the solenoid valve is fixedly installed on the second liquid inlet pipe, the liquid inlet assembly is fixedly connected to the second liquid inlet pipe, the synchronous drive assembly is fixedly connected to the top of the box body, the synchronous drive assembly is movably connected to the liquid circulation reversing assembly, when the liquid circulation reversing assembly is separated from the synchronous drive assembly, the second liquid inlet pipe is connected to the first pipeline, and the horizontal cylinder is connected to the third pipeline, and when the liquid circulation reversing assembly contacts the upper end of the protruding side wall of the synchronous drive assembly, the second liquid inlet pipe is connected to the second pipeline, and the fourth pipeline is connected to the first pipeline;

[0015] A liquid cooling supply component for cooling the liquid is fixedly connected to the rear side wall of the box body, and the output end and the input end of the liquid cooling supply component are fixedly connected to the liquid inlet component and the liquid outlet component.

[0016] Furthermore, the installation assembly includes a supporting base plate, two sets of positioning assemblies and two sets of locking assemblies. The two sets of positioning assemblies are symmetrically fixed on the top rear side of the supporting base plate, and the two sets of locking assemblies are symmetrically installed on the supporting base plate. The positioning assembly and locking assembly on one side are both connected to a set of liquid-cooled battery packs, and the supporting base plate is fixedly connected to the rear side wall of the box.

[0017] Furthermore, the positioning assembly includes a group of rear baffles and two groups of side guide plates, the two groups of side guide plates are symmetrically arranged on both sides of the rear baffle, and the front end of the side guide plates is located in front of the front end of the rear baffle, and the rear baffle and the side guide plates are fixedly installed on the supporting base plate.

[0018] Furthermore, the locking assembly includes two groups of threaded rods, two groups of nuts, four groups of convex rings, two groups of insertion rods, two groups of L-shaped hanging plates and square plates. The four groups of convex rings are fixedly installed on the front and rear ends of the left and right side walls of the liquid-cooled battery pack, the two groups of L-shaped hanging plates are symmetrically arranged on the outside of the square plate, and the two groups of L-shaped hanging plates are fixedly connected to the threaded rods, and the vertical parts of the L-shaped hanging plates are fitted and slidably connected to the inner walls of the square plates. The two groups of threaded rods are fixedly installed on the rear side of the top of the square plate, and the two groups of insertion rods are fixedly installed on the rear side of the top of the square plate. The insertion rods and threaded rods both pass through the supporting base plate and are fitted and slidably connected to the straight holes opened in the convex rings. The upper end of the threaded rod is threadedly connected to the nut, and the bottom of the nut is fitted and contacted with the bottom of the convex ring connected to the front end of the liquid-cooled battery pack. When the square plate is at the lower end, the bottom of the square plate is fitted and contacted with the horizontal part of the L-shaped hanging plate, and the tops of the insertion rods and threaded rods are lower than the top of the supporting base plate.

[0019] Furthermore, the synchronous drive assembly includes a guide rod, an electromagnet, an n-shaped plate and a trapezoidal block. The guide rod and the electromagnet are fixedly installed on the top of the box body. The driving end of the electromagnet is fixedly connected to the top of the n-shaped plate. The n-shaped plate is slidingly connected to the guide rod through a sliding hole. Multiple groups of trapezoidal blocks are divided into two groups and fixedly installed on the side walls of the vertical part of the n-shaped plate at equal intervals. The trapezoidal blocks are movably connected to the liquid flow reversing assembly.

[0020] Furthermore, the liquid circulation reversing assembly includes a first spring, a fixed plate, a sliding rod, a transverse cylinder, a second piston and a third piston. The transverse cylinder is slidably connected to the sliding rod through a sliding hole. The second piston and the third piston are fixedly connected to the part of the sliding rod located in the transverse cylinder. The outer end of the sliding rod is fixedly connected to the fixed plate. The two ends of the first spring are respectively fixedly connected to the fixed plate and the transverse cylinder. The first spring is sleeved on the sliding rod. The outer end of the sliding rod is movably connected to the trapezoidal block. The other end of the second pipe and the first pipe are fixedly connected to the through hole on the inside of the transverse cylinder. One end of the third pipe, the second liquid inlet pipe and the fourth pipe are fixedly connected to the through hole on the outside of the transverse cylinder.

[0021] Furthermore, the first pipe, the second pipe and the second liquid inlet pipe are all connected to a buffer component for buffering.

[0022] A method for controlling an electric energy storage device comprises the following steps:

[0023] Step 1: Monitor the current I passing through the liquid-cooled battery pack and determine whether I is equal to 0. If it is 0, monitor the ambient temperature. , then execute step 3. If it is not 0, execute step 2;

[0024] Step 2: Determine whether I is the charging current. If it is the charging current, monitor the charging voltage. , then execute step 3. If it is determined that it is not a charging current, execute step 3;

[0025] Step 3: Calculate the heat generation power P of the liquid-cooled battery pack, and calculate the coolant flow through the solenoid valve based on the heat generation power P , and control the opening degree of the solenoid valve;

[0026] Step 4: Pass the coolant flow through all the solenoid valves The sum of the two is the output flow of the liquid cooling supply component.

[0027] Furthermore, the heat generation power P of the liquid-cooled battery pack is calculated as follows:

[0028]

[0029] is the charging voltage, V; is the internal resistance of the liquid-cooled battery pack, Ω; is the rated voltage of the liquid-cooled battery pack, V; is the heat transfer coefficient between the liquid-cooled battery pack and the environment, ; is the surface area of ​​the liquid-cooled battery pack, m²; is the ambient temperature, °C; is the set temperature, ℃; I is the current passing through the liquid-cooled battery pack, A.

[0030] Furthermore, the coolant flow rate is controlled by the solenoid valve. The specific calculation is as follows:

[0031] ;

[0032] ;

[0033] is the coolant flow rate, m 3 / s; P is the heat generation power of the liquid-cooled battery pack, J / s; is the radiation heat dissipation coefficient, which is 0.1-0.2; is the coolant density, kg / m 3 ; is the specific heat capacity of the coolant, ; is the temperature difference between the inlet and outlet of the coolant, K; is the temperature of the coolant entering the liquid-cooled battery pack, °C; is the temperature of the coolant leaving the liquid-cooled battery pack, ℃.

[0034] The present invention has the following technical effects:

[0035] The present invention opens the side panel, installs the liquid-cooled battery pack on the installation assembly, connects the first pipe and the second pipe of the adjustable liquid supply assembly to the two ends of the cooling channel of the liquid-cooled battery pack through the side hole, and facilitates the connection and installation of the liquid-cooled battery pack and the adjustable liquid supply assembly. Then, the side hole is closed, the door panel and the box body are connected, the liquid circulation reversing assembly is separated from the synchronous drive assembly, and when the liquid-cooled battery pack needs to dissipate heat, the solenoid valve is opened, and the liquid-cooled battery pack inputs the cooling liquid into the second liquid inlet pipe through the liquid inlet assembly. The cooling liquid enters the first pipe through the liquid circulation reversing assembly, and the cooling liquid enters the liquid-cooled battery pack to absorb the heat in the liquid-cooled battery pack, and then enters the second pipe, and then passes through the liquid flow The liquid enters the third pipe through the reversing component and then returns to the liquid cooling supply component through the liquid outlet component. When reversing is required, the liquid circulation reversing component contacts the upper end of the protruding side wall of the synchronous drive component, the second liquid inlet pipe is connected to the second pipe, and the fourth pipe is connected to the first pipe. The coolant enters the second pipe through the liquid circulation reversing component, enters the liquid-cooled battery pack to absorb the heat in the liquid-cooled battery pack, and then enters the first pipe, and then enters the fourth pipe through the liquid circulation reversing component, and then returns to the liquid cooling supply component through the liquid outlet component. The coolant in the liquid-cooled battery pack alternates and circulates. Compared with the existing one-way circulation of the coolant in the liquid-cooled battery pack, it can achieve low-flow balanced heat dissipation processing, energy saving and environmental protection;

[0036] The present invention can accurately calculate the coolant flow rate of a single liquid-cooled battery pack , which is beneficial for a single liquid-cooled battery pack to dissipate heat under the set state, ensuring the heat dissipation effect, and then passing the coolant flow through all the solenoid valves The sum of the two determines the output flow of the liquid cooling liquid supply component, ensuring that the output flow of the liquid cooling liquid supply component meets the required flow, avoiding the phenomenon of unsatisfactory heat dissipation caused by the small output flow of the liquid cooling liquid supply component, and avoiding the phenomenon of energy waste caused by the output flow of the liquid cooling liquid supply component exceeding the required flow, which is more energy-saving and environmentally friendly; in addition, the radiation heat dissipation coefficient The introduction of this function can eliminate the heat dissipated by radiation and more accurately calculate the coolant flow through the solenoid valve. . BRIEF DESCRIPTION OF THE DRAWINGS

[0037] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0038] Figure 1 The present invention is a three-dimensional electric energy storage device Figure 1 ;

[0039] Figure 2 This is a front view of an electric energy storage device of the present invention;

[0040] Figure 3 The present invention is a three-dimensional electric energy storage device Figure 2 ;

[0041] Figure 4 To follow Figure 2 AA direction cross-sectional view;

[0042] Figure 5 The present invention is a three-dimensional adjustable liquid supply component and its connection structure Figure 1 ;

[0043] Figure 6 for Figure 5 Enlarged view of point D in the middle;

[0044] Figure 7 This is a front view of the adjustable liquid supply assembly and its connection structure of the present invention;

[0045] Figure 8 The present invention is a three-dimensional adjustable liquid supply component and its connection structure Figure 2 ;

[0046] Figure 9 The present invention is a three-dimensional adjustable liquid supply component and its connection structure Figure 3 ;

[0047] Figure 10 To follow Figure 7 BB direction cross-sectional view;

[0048] Figure 11 for Figure 10 Enlarged view of point E in the middle;

[0049] Figure 12 To follow Figure 7 CC direction cross-sectional view;

[0050] Figure 13 for Figure 12 Enlarged view of point F in the middle.

[0051] The numbers in the figure represent:

[0052] 1. Housing 2. Door Panel 3. Side Panel 4. Liquid-Cooling Supply Assembly 5. Side Port 6. Liquid-Cooled Battery Pack 7. Adjustable Liquid Supply Assembly 71. Guide Rod 72. Electromagnet 73. N-Shaped Plate 74. First Liquid Outlet Pipe 75. First Liquid Inlet Pipe 76. Solenoid Valve 77. First Spring 78. Fixed Plate 79. Sliding Rod 710. First Pipe 711. Trapezoidal Block 712. Straight Cylinder 713. First Piston 714. Horizontal Cylinder 715. Second Pipe 716. Third Pipe 717. Second Liquid Inlet Pipe 718. Third Liquid Inlet Pipe 719. Second Liquid Outlet Pipe 720. Second Piston 721. Third Piston 722. Fourth Pipe 723. Second Spring 8. Charge and Discharge Control Module 9. Mounting Assembly 91. Threaded Rod 92. Support Base Plate 93. Nut 94. Raised Ring 95. Insert Rod 96. L-Shaped Hanging Plate 97. Square Plate 98. Rear Baffle 99. Side Guide Plate 10. Partition DETAILED DESCRIPTION

[0053] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0054] The present invention will be further described below with reference to the embodiments.

[0055] The terms “left,” “right,” “front,” “back,” “up,” and “down” mentioned in the following description are oriented in the viewing direction of the front view.

[0056] Example 1: Please refer to Figures 1-13 , an electric energy storage device, comprising a box 1, a liquid-cooled battery pack 6 and a charge and discharge control module 8;

[0057] The front end of the box body 1 is connected to the door panel 2 by a hinge;

[0058] The left and right side walls of the box body 1 are both provided with side holes 5, and the box body 1 is connected to the side panels 3 at the outer ends of the side holes 5 through hinges and locks;

[0059] The charge and discharge control module 8 is fixedly installed at the bottom of the box 1;

[0060] A partition 10 is fixedly connected to the inner wall of the box body 1, and the charge and discharge control module 8 is located below the partition 10. The partition 10 is fixedly connected to multiple groups of mounting components 9 for supporting the liquid-cooled battery pack 6 through a supporting straight plate. Two groups of liquid-cooled battery packs 6 are symmetrically fixedly mounted on the mounting components 9;

[0061] The top of the box body 1 is fixedly connected to an adjustable liquid supply assembly 7 for dissipating heat from the liquid-cooled battery pack 6;

[0062] The adjustable liquid supply assembly 7 includes a synchronous drive assembly, a liquid circulation reversing assembly, a solenoid valve 76, a liquid inlet assembly, a liquid outlet assembly, a first pipe 710, a second pipe 715, a third pipe 716, a second liquid inlet pipe 717 and a fourth pipe 722. One end of the first pipe 710 and the second pipe 715 is fixedly connected to the two ends of the cooling channel of the liquid-cooled battery pack 6, and the other end of the second pipe 715 and the first pipe 710 is fixedly connected to the through hole on the inside of the liquid circulation reversing assembly. One end of the third pipe 716, the second liquid inlet pipe 717 and the fourth pipe 722 is fixedly connected to the through hole on the outside of the liquid circulation reversing assembly, and the second liquid inlet pipe 717 is located between the third pipe 716 and Between the fourth pipe 722, the third pipe 716 and the fourth pipe 722 are connected to the liquid outlet assembly, the solenoid valve 76 is fixedly installed on the second liquid inlet pipe 717, the liquid inlet assembly is fixedly connected to the second liquid inlet pipe 717, the synchronous drive assembly is fixedly connected to the top of the box body 1, and the synchronous drive assembly is movably connected to the liquid circulation reversing assembly. When the liquid circulation reversing assembly is separated from the synchronous drive assembly, the second liquid inlet pipe 717 is connected to the first pipe 710, and the horizontal cylinder 714 is connected to the third pipe 716. When the liquid circulation reversing assembly contacts the upper end of the protruding side wall of the synchronous drive assembly, the second liquid inlet pipe 717 is connected to the second pipe 715, and the fourth pipe 722 is connected to the first pipe 710;

[0063] A liquid cooling supply assembly 4 for cooling the liquid is fixedly connected to the rear side wall of the box body 1 , and the output end and the input end of the liquid cooling supply assembly 4 are fixedly connected to the liquid inlet assembly and the liquid outlet assembly.

[0064] The liquid cooling liquid supply component 4 is an energy storage box type liquid cooler;

[0065] Open the side panel 3, install the liquid-cooled battery pack 6 on the installation assembly 9, and connect the first pipe 710 and one end of the second pipe 715 of the adjustable liquid supply assembly 7 to the two ends of the cooling channel of the liquid-cooled battery pack 6 through the side hole 5 to facilitate the connection and installation of the liquid-cooled battery pack 6 and the adjustable liquid supply assembly 7. Then close the side hole 5, connect the door panel 2 and the box body 1, separate the liquid circulation reversing assembly from the synchronous drive assembly, and when the liquid-cooled battery pack 6 needs to dissipate heat, open the solenoid valve 76, and the liquid-cooled battery pack 6 inputs the coolant into the second liquid inlet pipe 717 through the liquid inlet assembly. The coolant enters the first pipe 710 through the liquid circulation reversing assembly, and the coolant enters the liquid-cooled battery pack 6 to absorb the heat in the liquid-cooled battery pack 6, and then enters the second pipe 715, and then passes through the liquid flow The liquid enters the third pipe 716 through the reversing component and then returns to the liquid-cooled liquid supply component 4 through the liquid outlet component. When reversing is required, the liquid circulation reversing component contacts the upper end of the protruding side wall of the synchronous drive component, the second liquid inlet pipe 717 is connected to the second pipe 715, and the fourth pipe 722 is connected to the first pipe 710. The cooling liquid enters the second pipe 715 through the liquid circulation reversing component, and the cooling liquid enters the liquid-cooled battery pack 6 to absorb the heat in the liquid-cooled battery pack 6, and then enters the first pipe 710, and then enters the fourth pipe 722 through the liquid circulation reversing component, and then returns to the liquid-cooled liquid supply component 4 through the liquid outlet component. The cooling liquid in the liquid-cooled battery pack 6 alternates and exchanges directions. Compared with the existing one-way circulation of the cooling liquid of the liquid-cooled battery pack 6, it can achieve low-flow balanced heat dissipation processing, energy saving and environmental protection;

[0066] The connection between the first pipe 710 and the transverse cylinder 714 is located inside the connection between the fourth pipe 722 and the transverse cylinder 714. The connection between the second pipe 715 and the transverse cylinder 714 is located inside the connection between the third pipe 716 and the transverse cylinder 714. The connection between the first pipe 710 and the transverse cylinder 714 and the connection between the third pipe 716 and the transverse cylinder 714 are both located outside the connection between the second liquid inlet pipe 717 and the transverse cylinder 714.

[0067] The mounting assembly 9 includes a supporting base plate 92, two sets of positioning assemblies, and two sets of locking assemblies. The two sets of positioning assemblies are symmetrically fixedly mounted on the top rear side of the supporting base plate 92, and the two sets of locking assemblies are symmetrically mounted on the supporting base plate 92. The positioning assembly and the locking assembly on one side are both connected to a group of liquid-cooled battery packs 6. The supporting base plate 92 is fixedly connected to the rear side wall of the box body 1.

[0068] The top of the partition 10 is fixedly connected to the side wall of the supporting bottom plate 92 through a supporting straight plate;

[0069] The positioning assembly includes a set of rear baffles 98 and two sets of side guide plates 99. The two sets of side guide plates 99 are symmetrically arranged on both sides of the rear baffle 98, and the front ends of the side guide plates 99 are located in front of the front end of the rear baffle 98. The rear baffle 98 and the side guide plates 99 are fixedly mounted on the support base 92.

[0070] The locking assembly includes two sets of threaded rods 91, two sets of nuts 93, four sets of convex rings 94, two sets of plug rods 95, two sets of L-shaped hanging plates 96 and square plates 97. The four sets of convex rings 94 are fixedly installed on the front and rear ends of the left and right side walls of the liquid-cooled battery pack 6. The two sets of L-shaped hanging plates 96 are symmetrically arranged on the outside of the square plate 97, and the two sets of L-shaped hanging plates 96 are fixedly connected to the threaded rods 91. The vertical part of the L-shaped hanging plate 96 is in sliding connection with the inner wall of the square plate 97. The two sets of threaded rods 91 are fixedly installed on the top and rear side of the square plate 97. , two sets of insertion rods 95 are fixedly installed on the rear side of the top of the square plate 97, and the insertion rods 95 and the threaded rods 91 are all inserted through the support base plate 92 and then slidably connected with the straight holes opened in the convex ring 94. The upper end of the threaded rod 91 is threadedly connected with the nut 93, and the bottom of the nut 93 is in contact with the bottom of the convex ring 94 connected to the front end of the liquid-cooled battery pack 6. When the square plate 97 is at the lowest end, the bottom of the square plate 97 is in contact with the horizontal part of the L-shaped hanging plate 96, and the tops of the insertion rods 95 and the threaded rods 91 are lower than the top of the support base plate 92;

[0071] The nut 93 of the mounting assembly 9 is separated from the threaded rod 91, and the square plate 97 moves downward to the lowest end due to gravity. When the square plate 97 is at the lowest end, the bottom of the square plate 97 is in contact with the horizontal part of the L-shaped hanging plate 96, and the top of the insertion rod 95 and the threaded rod 91 is lower than the top of the supporting base plate 92. The liquid-cooled battery pack 6 is placed on the supporting base plate 92. After the liquid-cooled battery pack 6 contacts the side guide plates 99, the two groups of side guide plates 99 guide the liquid-cooled battery pack 6 in the center. The liquid-cooled battery pack 6 continues to move until it contacts the rear baffle 98, achieving the fixed position of the liquid-cooled battery pack 6. Positioning processing, at this time, the straight hole opened by the convex ring 94 is located directly above the insertion rod 95 and the threaded rod 91, pushing the square plate 97 to move along the vertical part of the L-shaped hanging plate 96, and the square plate 97 drives the insertion rod 95 and the threaded rod 91 to pass through the straight hole opened by the convex ring 94, and then the nut 93 is threadedly connected to the threaded rod 91 to realize the positioning and installation of the liquid-cooled battery pack 6, which is beneficial for the two ends of the cooling channel of the liquid-cooled battery pack 6 to be arranged opposite the first pipe 710 and the second pipe 715, so as to facilitate the later connection of the first pipe 710 and the second pipe 715 with the two ends of the cooling channel of the liquid-cooled battery pack 6;

[0072] The synchronous drive assembly includes a guide rod 71, an electromagnet 72, an n-shaped plate 73, and a trapezoidal block 711. The guide rod 71 and the electromagnet 72 are fixedly mounted on the top of the box body 1. The driving end of the electromagnet 72 is fixedly connected to the top of the n-shaped plate 73. The n-shaped plate 73 is slidably connected to the guide rod 71 through a sliding hole. The multiple groups of trapezoidal blocks 711 are divided into two groups and fixedly mounted at equal intervals on the side walls of the vertical portion of the n-shaped plate 73. The trapezoidal blocks 711 are movably connected to the liquid flow reversing assembly.

[0073] The liquid circulation reversing assembly includes a first spring 77, a fixed plate 78, a sliding rod 79, a transverse cylinder 714, a second piston 720 and a third piston 721. The transverse cylinder 714 is slidably connected to the sliding rod 79 through a sliding hole. The sliding rod 79 is fixedly connected to the second piston 720 and the third piston 721 at the position inside the transverse cylinder 714. The outer end of the sliding rod 79 is fixedly connected to the fixed plate 78. The two ends of the first spring 77 are respectively fixedly connected to the fixed plate 78 and the transverse cylinder 714. The first spring 77 is sleeved on the sliding rod 79. The outer end of the sliding rod 79 is movably connected to the trapezoidal block 711. The other ends of the second pipe 715 and the first pipe 710 are fixedly connected to the through hole inside the transverse cylinder 714. One end of the third pipe 716, the second liquid inlet pipe 717 and the fourth pipe 722 are fixedly connected to the through hole outside the transverse cylinder 714.

[0074] The electromagnet 72 of the liquid flow reversing assembly drives the n-shaped plate 73 to move upward, the guide rod 71 guides the n-shaped plate 73, the n-shaped plate 73 drives the trapezoidal block 711 to move upward, the trapezoidal block 711 separates from the slide bar 79 of the synchronous drive assembly, the first spring 77 drives the fixed plate 78 to move toward the n-shaped plate 73, the fixed plate 78 drives the slide bar 79 to move toward the n-shaped plate 73, the second piston 720 approaches the side wall of the third pipe 716 and is flush with the side wall of the first pipe 710 near the fourth pipe 722, the third piston 721 approaches the side wall of the fourth pipe 722 and is flush with the side wall of the second liquid inlet pipe 717 near the third pipe 716. At this time, the coolant in the second liquid inlet pipe 717 enters the first pipe 710 through the space between the second piston 720 and the third piston 721;

[0075] When the liquid-cooled battery pack 6 needs to dissipate heat, the solenoid valve 76 is opened, and the liquid-cooled battery pack 6 inputs the coolant into the second liquid inlet pipe 717 through the liquid inlet assembly. The coolant enters the first pipe 710 through the second piston 720, the horizontal cylinder 714, and the third piston 721. The coolant enters the liquid-cooled battery pack 6 and absorbs the heat in the liquid-cooled battery pack 6. Then, the coolant enters the second pipe 715, and then enters the third pipe 716 through the liquid flow reversing assembly. Then, the coolant returns to the liquid-cooled liquid supply assembly 4 through the liquid outlet assembly.

[0076] When reversing is required, the electromagnet 72 of the liquid flow reversing assembly drives the n-shaped plate 73 to move downward, the guide rod 71 guides the n-shaped plate 73, the n-shaped plate 73 drives the trapezoidal block 711 to move downward, the trapezoidal block 711 moves downward and contacts the sliding rod 79 of the synchronous drive assembly until it contacts the upper end of the side wall of the trapezoidal block 711, the first spring 77 drives the fixed plate 78 to move away from the n-shaped plate 73, the fixed plate 78 drives the sliding rod 79 to move away from the n-shaped plate 73, the second piston 720 approaches the side wall of the third pipe 716 and is flush with the side wall of the second liquid inlet pipe 717 close to the fourth pipe 722, the third piston 721 approaches the side wall of the third pipe 716 and is flush with the side wall of the third pipe 716 away from the third pipe 716. At this time, the coolant in the second liquid inlet pipe 717 enters the second pipe 715 through the space between the second piston 720 and the third piston 721;

[0077] The coolant enters the second pipe 715 through the liquid circulation reversing assembly, enters the liquid-cooled battery pack 6, absorbs the heat in the liquid-cooled battery pack 6, and then enters the first pipe 710. Then, it enters the fourth pipe 722 through the liquid circulation reversing assembly, and then returns to the liquid-cooled liquid supply assembly 4 through the liquid outlet assembly. The coolant in the liquid-cooled battery pack 6 is circulated in an alternating manner.

[0078] The liquid inlet assembly includes a first liquid inlet pipe 75 and a third liquid inlet pipe 718. The two sets of first liquid inlet pipes 75 are fixedly connected to the third liquid inlet pipe 718. The third liquid inlet pipe 718 is fixedly connected to the output end of the liquid-cooling liquid supply assembly 4. The second liquid inlet pipes 717 on one side of the support base 92 are fixedly connected to the first liquid inlet pipe 75 on one side of the support base 92. The second liquid inlet pipes 717 on the other side of the support base 92 are fixedly connected to the first liquid inlet pipe 75 on the other side of the support base 92.

[0079] The liquid cooling supply assembly 4 delivers the cooled coolant to the third liquid inlet pipe 718, which is then diverted to the first liquid inlet pipe 75, enters the second liquid inlet pipe 717, and then enters the horizontal cylinder 714;

[0080] The liquid outlet assembly includes two sets of first liquid outlet pipes 74 and second liquid outlet pipes 719. The two sets of first liquid outlet pipes 74 are fixedly connected to the second liquid outlet pipes 719. The fourth pipe 722 and the third pipe 716 on one side of the support base 92 are both fixedly connected to the first liquid outlet pipes 74 on one side of the support base 92. The fourth pipe 722 and the third pipe 716 on the other side of the support base 92 are both fixedly connected to the first liquid outlet pipes 74 on the other side of the support base 92. The second liquid outlet pipe 719 is fixedly connected to the input end of the liquid-cooling liquid supply assembly 4.

[0081] The cooling liquid that has absorbed heat in the horizontal cylinder 714 enters the first liquid outlet pipe 74 through the third pipe 716 or the fourth pipe 722, and then is concentrated in the second liquid outlet pipe 719 and returned to the liquid cooling supply assembly 4 for cooling.

[0082] The first pipe 710, the second pipe 715 and the second liquid inlet pipe 717 are all connected to a buffer assembly for buffering;

[0083] The buffer assembly includes a straight cylinder 712, a first piston 713, and a second spring 723. The two ends of the second spring 723 are fixedly connected to the inner end of the straight cylinder 712 and the end of the first piston 713, respectively. The first piston 713 is in sliding contact with the inner wall of the straight cylinder 712. The straight cylinder 712 located at the first pipe 710 is in communication and fixed connection with the first pipe 710. The straight cylinder 712 located at the second pipe 715 is in communication and fixed connection with the second pipe 715. The straight cylinder 712 located at the second liquid inlet pipe 717 is in communication and fixed connection with the second liquid inlet pipe 717.

[0084] When the first pipe 710 of the liquid flow reversing assembly is switched from liquid outlet to liquid inlet, the first pipe 710 and the second liquid inlet pipe 717 stop circulating coolant. Since the coolant in the liquid-cooled battery pack 6 and the coolant in the second liquid inlet pipe 717 contain kinetic energy, the coolant liquid pressure in the first pipe 710 and the second liquid inlet pipe 717 increases. The coolant in the first pipe 710 and the second liquid inlet pipe 717 pushes the first piston 713 of the second spring 723 connected in the first pipe 710 and the second liquid inlet pipe 717 to move toward the straight cylinder 712, compressing the straight cylinder 712 and releasing the coolant liquid pressure in the first pipe 710 and the second liquid inlet pipe 717, effectively alleviating water hammer, reducing the impact force at the connection between the first pipe 710 and the second liquid inlet pipe 717 and the horizontal cylinder 714, and the impact force of the solenoid valve 76;

[0085] When the second pipe 715 of the liquid flow reversing assembly is changed from liquid outlet to liquid inlet, the second pipe 715 and the second liquid inlet pipe 717 will stop circulating coolant. Since the coolant in the liquid-cooled battery pack 6 and the coolant in the second liquid inlet pipe 717 contain kinetic energy, the coolant liquid pressure in the second pipe 715 and the second liquid inlet pipe 717 increases. The coolant in the second pipe 715 and the second liquid inlet pipe 717 pushes the first piston 713 of the second spring 723 connected in the second pipe 715 and the second liquid inlet pipe 717 to move toward the straight cylinder 712, compressing the straight cylinder 712 and releasing the coolant liquid pressure in the second pipe 715 and the second liquid inlet pipe 717, effectively alleviating water hammer, reducing the impact force at the connection between the second pipe 715 and the second liquid inlet pipe 717 and the horizontal cylinder 714, and the impact force of the solenoid valve 76.

[0086] Example 2: Please refer to Figures 1-12 As a preferred embodiment of the present invention, in order to better achieve the purpose of the present invention, the present invention further provides a control method for an electric energy storage device, comprising the following steps:

[0087] Step 1: Monitor the current I passing through the liquid-cooled battery pack 6 and its type, and determine whether I is equal to 0. If it is 0, monitor the ambient temperature. , then execute step 3. If it is not 0, execute step 2;

[0088] Step 2: Determine whether I is the charging current. If it is the charging current, monitor the charging voltage. , then execute step 3. If it is determined that it is not a charging current, execute step 3;

[0089] Step 3: Calculate the heat generation power P of the liquid-cooled battery pack 6, and calculate the coolant flow rate through the solenoid valve 76 based on the heat generation power P , and controls the opening degree of the solenoid valve 76;

[0090] Step 4: Pass all solenoid valves 76 through the coolant flow The sum of the total is the output flow of the liquid cooling liquid supply component 4.

[0091] The heat generation power P of the liquid-cooled battery pack 6 is specifically calculated as follows:

[0092]

[0093] is the charging voltage, V; is the internal resistance of the liquid-cooled battery pack 6, Ω; Rated voltage of liquid-cooled battery pack 6, V; is the heat transfer coefficient between the liquid-cooled battery pack 6 and the environment, ; Surface area of ​​liquid-cooled battery pack 6, m 2 ; is the ambient temperature, °C; is the set temperature, °C; I is the current passing through the liquid-cooled battery pack 6, A.

[0094] Coolant flow through solenoid valve 76 The specific calculation is as follows:

[0095] ;

[0096] ;

[0097] is the coolant flow rate, m³ / s; P is the heat generation power of the liquid-cooled battery pack 6, J / s; is the radiation heat dissipation coefficient, which is 0.1-0.2; is the coolant density, kg / m 3 ; is the specific heat capacity of the coolant, ; is the temperature difference between the inlet and outlet of the coolant, K; is the temperature of the coolant entering the liquid-cooled battery pack 6, °C; is the temperature of the coolant exiting the liquid-cooled battery pack 6, °C.

[0098] By using the above method, the coolant flow rate of a single liquid-cooled battery pack 6 can be accurately calculated. , which is beneficial for the single liquid-cooled battery pack 6 to dissipate heat under the set state, ensuring the heat dissipation effect, and then passing the coolant flow through all the solenoid valves 76 The sum of the two determines the output flow of the liquid cooling liquid supply component 4, ensuring that the output flow of the liquid cooling liquid supply component 4 meets the required flow, avoiding the phenomenon of unsatisfactory heat dissipation caused by the small output flow of the liquid cooling liquid supply component 4, and avoiding the phenomenon of energy waste caused by the output flow of the liquid cooling liquid supply component 4 exceeding the required flow, which is more energy-saving and environmentally friendly; in addition, the radiation heat dissipation coefficient The introduction of the heat dissipation by radiation can eliminate the heat dissipation and more accurately calculate the coolant flow through the solenoid valve 76 .

[0099] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An electric energy storage device comprising a housing (1), a liquid-cooled battery pack (6) and a charge and discharge control module (8), characterized in that: The charge and discharge control module (8) is fixedly installed on the bottom of the box (1); A partition (10) is fixedly connected to the inner wall of the box body (1), the charge and discharge control module (8) is located below the partition (10), the partition (10) is fixedly connected to the mounting assembly (9) via a supporting straight plate, and the two groups of liquid-cooled battery packs (6) are symmetrically fixedly mounted on the mounting assembly (9); A regulating liquid supply assembly (7) for dissipating heat from the liquid-cooled battery pack (6) is fixedly connected to the top of the box body (1); The adjustable liquid supply assembly (7) includes a synchronous drive assembly, a liquid circulation reversing assembly, a solenoid valve (76), a liquid inlet assembly, a liquid outlet assembly, a first pipe (710), a second pipe (715), a third pipe (716), a second liquid inlet pipe (717) and a fourth pipe (722), one end of the first pipe (710) and the second pipe (715) are fixedly connected to the two ends of the cooling channel of the liquid-cooled battery pack (6), the other end of the second pipe (715) and the first pipe (710) are fixedly connected to the through hole inside the liquid circulation reversing assembly, one end of the third pipe (716), the second liquid inlet pipe (717) and the fourth pipe (722) are fixedly connected to the through hole outside the liquid circulation reversing assembly, and the second liquid inlet pipe (717) is located in the third pipe (716). ) and the fourth pipe (722), the third pipe (716) and the fourth pipe (722) are connected to the liquid outlet assembly, the solenoid valve (76) is fixedly installed on the second liquid inlet pipe (717), the liquid inlet assembly is fixedly connected to the second liquid inlet pipe (717), the synchronous drive assembly is fixedly connected to the top of the box body (1), the synchronous drive assembly is movably connected to the liquid circulation reversing assembly, when the liquid circulation reversing assembly is separated from the synchronous drive assembly, the second liquid inlet pipe (717) is connected to the first pipe (710), and the horizontal cylinder (714) is connected to the third pipe (716), when the liquid circulation reversing assembly contacts the upper end of the protruding side wall of the synchronous drive assembly, the second liquid inlet pipe (717) is connected to the second pipe (715), and the fourth pipe (722) is connected to the first pipe (710); A liquid cooling liquid supply assembly (4) is fixedly connected to the rear side wall of the box body (1), and the output end and the input end of the liquid cooling liquid supply assembly (4) are in communication and fixed connection with the liquid inlet assembly and the liquid outlet assembly.

2. The electrical energy storage device according to claim 1, characterized in that The mounting assembly (9) includes a supporting base plate (92), two sets of positioning assemblies, and two sets of locking assemblies. The two sets of positioning assemblies are symmetrically fixedly mounted on the top rear side of the supporting base plate (92), and the two sets of locking assemblies are symmetrically mounted on the supporting base plate (92). The positioning assembly and the locking assembly on one side are both connected to a set of liquid-cooled battery packs (6), and the supporting base plate (92) is fixedly connected to the rear side wall of the box body (1).

3. The electric energy storage device according to claim 2, characterized in that The positioning assembly includes a set of rear baffles (98) and two sets of side guide plates (99), the two sets of side guide plates (99) are symmetrically arranged on both sides of the rear baffle (98), and the front ends of the side guide plates (99) are located in front of the front end of the rear baffle (98), and the rear baffle (98) and the side guide plates (99) are fixedly mounted on the supporting base plate (92).

4. The electric energy storage device according to claim 3, characterized in that The locking assembly includes two sets of threaded rods (91), two sets of nuts (93), four sets of convex rings (94), two sets of insertion rods (95), two sets of L-shaped hanging plates (96) and a square plate (97). The four sets of convex rings (94) are fixedly installed on the front and rear ends of the left and right side walls of the liquid-cooled battery pack (6). The two sets of L-shaped hanging plates (96) are symmetrically arranged on the outside of the square plate (97). Both sets of L-shaped hanging plates (96) are fixedly connected to the threaded rods (91). The vertical parts of the L-shaped hanging plates (96) are fitted and slidably connected to the inner wall of the square plate (97). The two sets of threaded rods (91) are fixedly installed on the top and rear side of the square plate (97). Two sets of insertion rods (95) are fixedly installed on the rear side of the top of the square plate (97). The insertion rods (95) and the threaded rods (91) are both inserted through the support base plate (92) and then fitted and slidably connected with the straight holes opened in the convex ring (94). The upper end of the threaded rod (91) is threadedly connected with the nut (93). The bottom of the nut (93) is fitted and contacted with the bottom of the convex ring (94) connected to the front end of the liquid-cooled battery pack (6). When the square plate (97) is at the lower end, the bottom of the square plate (97) is fitted and contacted with the horizontal part of the L-shaped hanging plate (96), and the tops of the insertion rods (95) and the threaded rods (91) are lower than the top of the support base plate (92).

5. The electric energy storage device according to claim 4, characterized in that The synchronous drive assembly includes a guide rod (71), an electromagnet (72), an n-shaped plate (73) and a trapezoidal block (711). The guide rod (71) and the electromagnet (72) are fixedly installed on the top of the box (1). The driving end of the electromagnet (72) is fixedly connected to the top of the n-shaped plate (73). The n-shaped plate (73) is slidably connected to the guide rod (71) through a sliding hole. The multiple groups of trapezoidal blocks (711) are equally divided into two groups and are fixedly installed on the side wall of the vertical portion of the n-shaped plate (73) at equal intervals. The trapezoidal blocks (711) are movably connected to the liquid flow reversing assembly.

6. The electrical energy storage device according to claim 5, characterized in that The liquid circulation reversing assembly includes a first spring (77), a fixed plate (78), a slide rod (79), a transverse cylinder (714), a second piston (720) and a third piston (721). The transverse cylinder (714) is slidably connected to the slide rod (79) through a sliding hole. The slide rod (79) is fixedly connected to the second piston (720) and the third piston (721) at a position inside the transverse cylinder (714). The outer end of the slide rod (79) is fixedly connected to the fixed plate (78). The first spring (77) The two ends are fixedly connected to the fixed plate (78) and the horizontal cylinder (714) respectively, the first spring (77) is sleeved on the slide rod (79), the outer end of the slide rod (79) is movably connected to the trapezoidal block (711), the other ends of the second pipe (715) and the first pipe (710) are fixedly connected to the through hole inside the horizontal cylinder (714), and one end of the third pipe (716), the second liquid inlet pipe (717) and the fourth pipe (722) are fixedly connected to the through hole outside the horizontal cylinder (714).

7. The electrical energy storage device according to claim 6, characterized in that The first pipe (710), the second pipe (715) and the second liquid inlet pipe (717) are all interconnected and connected to a buffer assembly for buffering.

8. A control method for an electric energy storage device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Monitor the current I passing through the liquid-cooled battery pack (6) and its type, and determine whether I is equal to 0. If it is 0, monitor the ambient temperature. , then execute step 3. If it is not 0, execute step 2; Step 2: Determine whether I is the charging current. If it is the charging current, monitor the charging voltage. , then execute step 3. If it is determined that it is not a charging current, execute step 3; Step 3: Calculate the heat generation power P of the liquid-cooled battery pack (6), and calculate the coolant flow rate through the solenoid valve (76) based on the heat generation power P. , and controls the opening degree of the solenoid valve (76); Step 4: Connect all solenoid valves (76) to the coolant flow The sum of the two is the output flow of the liquid cooling supply component (4).

9. The control method according to claim 8, characterized in that: The heat generation power P of the liquid-cooled battery pack (6) is specifically calculated as follows: is the charging voltage, V; is the internal resistance of the liquid-cooled battery pack (6), Ω; is the rated voltage of the liquid-cooled battery pack (6), V; is the heat transfer coefficient between the liquid-cooled battery pack (6) and the environment, ; is the surface area of ​​the liquid-cooled battery pack (6), m²; is the ambient temperature, °C; is the set temperature, °C; I is the current passing through the liquid-cooled battery pack (6), A.

10. The control method according to claim 9, characterized in that: Coolant flow through solenoid valve (76) The specific calculation is as follows: ； ； is the coolant flow rate, m 3 / s; P is the heat generation power of the liquid-cooled battery pack (6), J / s; is the radiation heat dissipation coefficient, which is 0.1-0.2; is the coolant density, kg / m 3 ; is the specific heat capacity of the coolant, ; is the temperature difference between the coolant inlet and outlet, K; is the temperature of the coolant entering the liquid-cooled battery pack (6), °C; is the temperature of the coolant exiting the liquid-cooled battery pack (6), °C.

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