A lithium battery energy storage device and energy storage method

Abstract

The present application relates to a lithium battery energy storage device and an energy storage method, and relates to the technical field of energy storage devices. The lithium battery energy storage device includes a box body, a heat insulation board group is arranged in the box body, and the heat insulation board group divides the space in the box body into a first space and a second space that are independent of each other; a power manager, the power manager is arranged on the box body; an energy storage mechanism, including a first energy storage component and a second energy storage component, the first energy storage component is located in the first space, the second energy storage component is located in the second space, the first energy storage component and the second energy storage component are both independently electrically connected to the power manager, and the power manager is used to control the first energy storage component and the second energy storage component to alternately discharge or alternately charge; an active heat dissipation mechanism, the active heat dissipation mechanism is arranged in the box body, and the active heat dissipation mechanism is used to dissipate heat for the first energy storage component and the second energy storage component. The present application can reduce the possibility of overheating and fire inside the energy storage device while ensuring that the energy storage device works for a long time.

Description

Technical Field

[0001] This application relates to the technical field of energy storage devices, and in particular, to a lithium battery energy storage device and an energy storage method. Background Art

[0002] A lithium battery is a secondary battery that uses the movement of lithium ions between the positive and negative electrodes to achieve charge and discharge. It has the advantages of high energy density, long life, and no memory effect, and is widely used in fields such as consumer electronics, electric vehicles, and energy storage.

[0003] Existing lithium battery energy storage devices can supply power to electrical equipment. During the charging and discharging processes of the lithium battery energy storage device, heat is generated. The lithium battery energy storage device is very sensitive to the operating temperature. When the temperature of the lithium battery energy storage device is relatively high, it will exacerbate the side reactions of the battery, resulting in capacity attenuation and shortened life, and even may cause a fire due to overheating.

[0004] Currently, the main heat dissipation method for lithium battery energy storage devices is air-cooled heat dissipation, which is basically achieved by installing a fan on the lithium battery energy storage device.

[0005] Since existing lithium battery energy storage devices are generally composed of multiple lithium batteries spliced together, there will be gaps inside the lithium battery energy storage device. And because air-cooled heat dissipation takes away the heat inside the lithium battery energy storage device through the heat dissipation air flow, and the movement direction of the heat dissipation air flow in the existing air-cooled heat dissipation method is single, this leads to the heat dissipation air flow being unable to enter some gaps inside the lithium battery energy storage device. When heat accumulates in these gaps, it will make it difficult to control the temperature of the lithium battery energy storage device. Especially when the lithium battery energy storage device works for a long time, the lithium battery energy storage device will continuously generate heat, which will cause the temperature of the lithium battery energy storage device to rise continuously. When the lithium battery energy storage device is continuously in a high-temperature environment, it is easy to cause the lithium battery energy storage device to overheat and catch fire. Summary of the Invention

[0006] This application provides a lithium battery energy storage device and an energy storage method, aiming to improve the heat dissipation ability of the lithium battery energy storage device and reduce the possibility of overheating of the lithium battery energy storage device.

[0007] In a first aspect, a lithium battery energy storage device provided by this application adopts the following technical solution:

[0008] A lithium battery energy storage device, comprising a box body, wherein a heat insulation plate group is arranged inside the box body, and the heat insulation plate group divides the space inside the box body into an independent first space and a second space; a power manager, which is arranged on the box body; an energy storage mechanism, including a first energy storage component and a second energy storage component, the first energy storage component is located in the first space, the second energy storage component is located in the second space, and both the first energy storage component and the second energy storage component are independently electrically connected to the power manager, and the power manager is used to control the first energy storage component and the second energy storage component to discharge or charge alternately; an active heat dissipation mechanism, which is arranged inside the box body, and the active heat dissipation mechanism is used to dissipate heat for the first energy storage component and the second energy storage component.

[0009] By adopting the above technical solution, the energy storage device can realize the charging and discharging functions through the cooperation of the box body, the power manager and the energy storage mechanism, and thus can realize the function of the energy storage device.

[0010] On this basis, through the cooperation of the first energy storage component and the second energy storage component in the energy storage mechanism, since both the first energy storage component and the second energy storage component are independently electrically connected to the power manager, the power manager can control the first energy storage component and the second energy storage component to work alternately in sequence. Furthermore, when the energy storage device is charging, the first energy storage component and the second energy storage component can charge alternately; when the energy storage device is discharging, the first energy storage component and the second energy storage component can discharge alternately.

[0011] This enables the second energy storage component to stop working for cooling when the first energy storage component generates heat during operation; similarly, when the second energy storage component generates heat during operation, the first energy storage component stops working for cooling. And since the first energy storage component and the second energy storage component are located in the first space and the second space respectively, and the first space and the second space are independent of each other, the heat generated by the first energy storage component and the second energy storage component will not affect each other.

[0012] Due to the alternating operation of the first energy storage component and the second energy storage component, when the corresponding first energy storage component or second energy storage component is not working, the active heat dissipation mechanism can quickly dissipate heat from the non-working first energy storage component or second energy storage component. And during this process, the non-working first energy storage component or second energy storage component does not generate heat, so the heat inside the first energy storage component and the second energy storage component will quickly conduct to the relatively lower temperature environment, thereby quickly reducing the temperature of the first energy storage component and the second energy storage component, and preventing the first energy storage component and the second energy storage component from overheating. This can reduce the possibility of fire caused by overheating inside the energy storage device while ensuring the long-term operation of the energy storage device.

[0013] Optionally, the heat insulation board group includes a first board and a second board, the first board and the second board are arranged in parallel at intervals, the first space is located on the side of the first board away from the second board, the second space is located on the side of the second board away from the first board, and a heat insulation space is formed between the first board and the second board; the active heat dissipation mechanism includes a third air-cooled heat dissipation component, and the third air-cooled heat dissipation component is located in the heat insulation space.

[0014] By adopting the above technical solution, the partition board group forms a heat insulation space between the first energy storage component and the second energy storage component through the cooperation of the first board and the second board, which can block the heat conduction between the first space and the second space, and further ensure that the first energy storage component and the second energy storage component can dissipate heat sufficiently when they stop working, which can further reduce the possibility of fire caused by overheating inside the energy storage device.

[0015] The active heat dissipation mechanism can accelerate the air flow in the heat insulation space through the setting of the third air-cooled heat dissipation component, which can further block the heat conduction between the first space and the second space.

[0016] Optionally, the active heat dissipation mechanism further includes a first air-cooled heat dissipation component and a second air-cooled heat dissipation component, the first air-cooled heat dissipation component is located in the first space, and the second air-cooled heat dissipation component is located in the second space.

[0017] By adopting the above technical solution, the active heat dissipation mechanism enables the first energy storage component and the second energy storage component to dissipate heat independently through the cooperation of the first air-cooled heat dissipation component and the second air-cooled heat dissipation component, which can ensure that the first energy storage component and the second energy storage component can quickly cool down and dissipate heat when they are not working.

[0018] Optionally, the first air-cooled heat dissipation component includes a first fan group, and first air intake hole groups and first heat dissipation hole groups are respectively formed on opposite side walls of the box body along its length direction, and both the first air intake hole groups and the first heat dissipation hole groups communicate with the first space; the first fan group is arranged on the side wall of the box body where the first air intake hole groups are formed.

[0019] By adopting the above technical solution, the first air-cooled heat dissipation component can form a heat dissipation air flow flowing along the length direction of the box body through the cooperation of the first fan group, the first air intake hole groups and the first heat dissipation hole groups, which can realize the heat dissipation function.

[0020] Optionally, the first air-cooled heat dissipation component includes a second fan group. Second air intake hole groups and second heat dissipation hole groups are respectively formed in opposite side walls of the box body along its width direction, and both the second air intake hole groups and the second heat dissipation hole groups communicate with the second space; the second fan group is arranged on the side wall of the box body where the second air intake hole groups are formed.

[0021] By adopting the above technical solution, through the cooperative arrangement of the second fan group, the second air intake hole groups, and the second heat dissipation hole groups, the first air-cooled heat dissipation component can form a heat dissipation air flow flowing along the width direction of the box body inside the box body, thereby realizing the heat dissipation function.

[0022] The cooperative arrangement of the first fan group and the second fan group enables the existence of a heat dissipation air flow flowing along the length direction of the box body and a heat dissipation air flow flowing along the width direction of the box body in the first space, which can reduce the heat dissipation dead corners in the first space and increase the heat dissipation effect. In addition, the first fan group and the second fan group can also be used alternately, thereby improving the service life of the first fan group and the second fan group.

[0023] Optionally, the first energy storage component includes a plurality of first batteries, and the plurality of first batteries are sequentially arranged at intervals along the width direction of the box body; a first connecting member is arranged on the first battery, the first connecting member includes two heat conducting plates, the two heat conducting plates are arranged at intervals along the width direction of the box body, the first battery is located between the corresponding two heat conducting plates, the heat conducting plates are connected to the side walls of the corresponding first battery, and the two heat conducting plates between adjacent two first batteries are detachably connected; the heat conducting plates are attached to the side walls of the first battery, and heat conducting grooves are formed on the sides of the heat conducting plates facing away from the first battery, and the heat conducting grooves penetrate through the heat conducting plates along the length direction of the box body.

[0024] By adopting the above technical solution, through the cooperative arrangement of the plurality of first batteries, the first energy storage component can ensure the functions of discharging, energy storage, and charging of the first energy storage component.

[0025] Since the first battery is provided with a first connecting member, the first connecting member includes two heat conducting plates, the heat conducting plates are connected to the first battery, and heat conducting grooves are formed on the heat conducting plates, the arrangement of the heat conducting plates can increase the heat dissipation area of the first battery, thereby improving the heat dissipation effect of the first battery.

[0026] The two heat conducting plates between adjacent two first batteries are detachably connected, which can realize the assembly of the plurality of first batteries through the first connecting member, thus facilitating the assembly of the first energy storage component.

[0027] Since there are two heat conduction plates between two adjacent first batteries after assembly, the two first batteries are arranged at intervals, thereby increasing the interval space between two adjacent first batteries, facilitating the rapid discharge of heat between two adjacent first batteries, and improving the heat dissipation speed of the first energy storage component.

[0028] Optionally, a first through hole is formed in the side wall of the first battery facing the heat conduction plate, and a second through hole is formed in the bottom of the heat conduction groove, and the first through hole communicates with the corresponding second through hole.

[0029] By adopting the above technical solution, the cooperation of the first through hole and the second through hole enables the internal and external spaces of the first battery to communicate, which facilitates the dissipation of the heat inside the first battery to the external space of the first battery, thereby reducing the temperature rise speed of the first battery and improving the heat dissipation efficiency of the first battery.

[0030] Optionally, a closing plate is arranged on the heat conduction plate, the closing plate is located in the heat conduction groove, the closing plate is rotatably connected to the bottom of the corresponding heat conduction groove, a rotation driving member is arranged on the heat conduction plate, the rotation driving member is connected to the closing plate, and the rotation driving member is used to drive the closing plate to rotate to close the corresponding second through hole.

[0031] By adopting the above technical solution, the cooperation of the closing plate and the closing driving member enables the closing plate to close or open the second through hole, thereby enabling the switching between two different heat dissipation methods. First, the second through hole is open. At this time, when the active heat dissipation mechanism dissipates heat, the heat dissipation air flow can enter the first battery, thereby improving the heat dissipation efficiency. Second, the second through hole is closed. At this time, the active heat dissipation mechanism can only take away the heat on the heat conduction plate, which can prevent the heat dissipation air flow from entering the first battery. Although the heat dissipation efficiency of this heat dissipation method is reduced, in the case of a poor working environment, it can prevent dust, humid air or pollutants from entering the first battery, thereby improving the service life of the first battery.

[0032] Optionally, a plurality of first energy storage components are arranged, and the plurality of first energy storage components are arranged at intervals in sequence along the length direction of the box body; a second connecting member is further arranged on the first battery, the first connecting member and the second connecting member have the same structure, and two heat conduction plates in the second connecting member are respectively arranged on opposite side walls of the first battery along the length direction of the box body.

[0033] By adopting the above technical solution, since a plurality of first energy storage components are arranged, all the first batteries are arranged in a matrix, and the cooperation of the first connecting member and the second connecting member on the first battery enables the plurality of first batteries arranged in a matrix to be spliced into a whole, which facilitates the assembly of the plurality of first energy storage components.

[0034] The cooperative setting of the second connecting member and the first connecting member enables the first battery to be spaced apart from any adjacent first battery, which can increase the spacing space between two adjacent first batteries, facilitate the rapid discharge of heat between two adjacent first batteries, and improve the heat dissipation speed of the first energy storage component.

[0035] In a second aspect, a lithium battery energy storage method provided by the present application adopts the following technical solution:

[0036] A lithium battery energy storage method for the above-mentioned lithium battery energy storage device includes the following steps: installing the first energy storage component, the second energy storage component and the heat insulation board group into the box body, and electrically connecting the first energy storage component and the second energy storage component to the power supply manager; when the lithium battery energy storage device is charging or discharging outward, the power supply manager controls the first energy storage component and the second energy storage component to charge or discharge outward alternately.

[0037] By adopting the above technical solution, by controlling the first energy storage component and the second energy storage component to work alternately, it can be ensured that neither the first energy storage component nor the second energy storage component will work for a long time, and thus will not generate heat for a long time, so that the overall temperature of the first energy storage component and the second energy storage component will not rise too high. On this basis, under the action of the active heat dissipation mechanism, the heat generated when the first energy storage component and the second energy storage component work can be quickly reduced, the temperature of the first energy storage component and the second energy storage component can be lowered, and further the possibility of the energy storage device catching fire due to overheating can be reduced.

[0038] In summary, the present application includes at least one of the following beneficial technical effects:

[0039] 1. Through the setting of the first energy storage component and the second energy storage component working alternately, the present application can prevent a single first energy storage component or a single second energy storage component from continuously generating heat during long-term operation. When the first energy storage component or the second energy storage component stops working, the active heat dissipation mechanism can quickly reduce the temperature of the first energy storage component or the second energy storage component, which can reduce the possibility of the interior of the energy storage device catching fire due to overheating while ensuring the long-term operation of the energy storage device.

[0040] 2. Through the cooperative setting of the first connecting member and the second connecting member, the present application can increase the spacing space between two adjacent first batteries, which can reduce the accumulation of heat between two adjacent first batteries and enable the heat accumulated between two adjacent first batteries to dissipate quickly, thereby reducing the possibility of the interior of the energy storage device catching fire due to overheating.

[0041] 3. Through the cooperative arrangement of the first air-cooling heat dissipation component's first fan group and second fan group in this application, a heat dissipation air flow that flows along the length and width directions of the box body can be formed inside the box body, which can increase the coverage range of the heat dissipation air flow inside the box body and enhance the heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is the overall structural schematic diagram of the lithium battery energy storage device of this application.

[0043] Figure 2 is the sectional structural schematic diagram of the lithium battery energy storage device of this application.

[0044] Figure 3 is the overall structural schematic diagram of the energy storage mechanism of this application.

[0045] Figure 4 is the overall structural schematic diagram of the lithium battery energy storage device of this application from another perspective.

[0046] Figure 5 is the overall structural schematic diagram of the first energy storage component of this application.

[0047] Figure 6 is the overall structural schematic diagram of the first battery of this application.

[0048] Figure 7 is the sectional structural schematic diagram of the first battery of this application.

[0049] Figure 8 is the overall structural schematic diagram of the heat conduction plate of this application.

[0050] Figure 9 is the partial structural schematic diagram of the energy storage mechanism of this application.

[0051] Figure 10 is the overall structural schematic diagram of the first battery and the corresponding second battery of this application.

[0052] Figure 11 is the overall structural schematic diagram of the heat insulation plate group of this application.

[0053] In the figure, 1 is the box body; 11 is the first space; 12 is the second space; 13 is the heat insulation space; 2 is the power manager; 3 is the energy storage mechanism; 31 is the first energy storage component; 311 is the first battery; 32 is the second energy storage component; 321 is the second battery; 33 is the first heat dissipation air duct; 34 is the second heat dissipation air duct; 4 is the heat insulation board group; 41 is the first board; 42 is the second board; 43 is the relief hole; 44 is the first long board; 45 is the second long board; 46 is the third long board; 47 is the fourth long board; 5 is the active heat dissipation mechanism; 51 is the first air-cooled heat dissipation component; 511 is the first fan group; 512 is the first air intake hole group; 513 is the first heat dissipation hole group; 514 is the second fan group; 515 is the second air intake hole group; 516 is the second heat dissipation hole group; 52 is the second air-cooled heat dissipation component; 53 is the third air-cooled heat dissipation component; 6 is the heat dissipation enhancement mechanism; 61 is the first connecting piece; 611 is the heat conduction plate; 6111 is the heat conduction groove; 6112 is the heat conduction hole; 6113 is the second through hole; 612 is the first through hole; 613 is the closed plate; 6131 is the air flow port; 614 is the rotation driving part; 6141 is the elastic piece; 6142 is the pressing plate; 6143 is the magnetic attraction driving part; 6144 is the electromagnet; 62 is the second connecting piece; 63 is the third connecting piece. Detailed implementation mode

[0054] The following is further described in detail in conjunction with the attached Figure 1 - attached Figure 11 , to further illustrate the present application.

[0055] A lithium battery energy storage device, referring to Figure 1 and Figure 2 , includes a box body 1, a power manager 2 is arranged on the box body 1, and an energy storage mechanism 3 is arranged in the box body 1.

[0056] Referring to Figure 2 and Figure 3 , the energy storage mechanism 3 includes a first energy storage component 31 and a second energy storage component 32. The first energy storage component 31 and the second energy storage component 32 are arranged independently of each other, and both the first energy storage component 31 and the second energy storage component 32 are electrically connected to the power manager 2.

[0057] Due to the setting of the power manager 2, the first energy storage component 31 and the second energy storage component 32 can supply power and charge independently of each other. Under the action of the power manager 2, the first energy storage component 31 and the second energy storage component 32 alternately charge and discharge in sequence, which enables the entire energy storage device to continuously charge or continuously discharge outward, preventing the first energy storage component 31 or the second energy storage component 32 from overheating due to continuous operation.

[0058] Referring to Figure 2 and Figure 3, a heat insulation board group 4 is arranged in the box body 1. The heat insulation board group 4 is detachably connected to the inner wall of the box body 1. The heat insulation board group 4 is horizontally arranged, and the heat insulation board group 4 divides the space in the box body 1 into an independent first space 11 and a second space 12. The first space 11 and the second space 12 are arranged at intervals in the vertical direction. The first energy storage component 31 is located in the first space 11, and the second energy storage component 32 is located in the second space 12.

[0059] Since the heat insulation board group 4 separates the first energy storage component 31 and the second energy storage component 32, it can block the heat conduction between the first energy storage component 31 and the second energy storage component 32.

[0060] Referring to Figure 2 and Figure 3 , the heat insulation board group 4 includes a first board 41 and a second board 42. The first board 41 and the second board 42 are both horizontally arranged, and the first board 41 and the second board 42 are arranged in parallel at intervals in the vertical direction. The first board 41 is located above the second board 42. A heat insulation space 13 is formed between the first board 41 and the second board 42. The first space 11 is located above the first board 41, and the second space 12 is located below the second board 42. This makes the first space 11, the heat insulation space 13, and the second space 12 arranged at intervals in the vertical direction in sequence. In this embodiment, both the first board 41 and the second board 42 are connected to the box body 1 by bolts.

[0061] The arrangement of the heat insulation space 13 can further block the heat conduction between the first energy storage component 31 and the second energy storage component 32.

[0062] Referring to Figure 1 and Figure 2 , an active heat dissipation mechanism 5 is arranged on the box body 1. The active heat dissipation mechanism 5 includes a first air-cooled heat dissipation component 51. The first air-cooled heat dissipation component 51 is located in the first space 11.

[0063] Referring to Figure 1 and Figure 4 , the first air-cooled heat dissipation component 51 includes a first fan group 511. The first fan group 511 is arranged on a side wall in the length direction of the box body 1, and the first fan group 511 is arranged opposite to the corresponding first space 11. First air intake hole groups 512 and first heat dissipation hole groups 513 are respectively formed on opposite side walls of the box body 1 along its length direction, and both the first air intake hole groups 512 and the first heat dissipation hole groups 513 are communicated with the corresponding first space 11. The first fan group 511 is located on the side wall of the box body 1 where the first air intake hole groups 512 are formed.

[0064] Under the action of the first fan group 511, the first air intake hole groups 512, and the first heat dissipation hole groups 513, a heat dissipation air flow flowing along the length direction of the box body 1 exists in the first space 11, which can improve the heat dissipation effect.

[0065] Reference Figure 1 and Figure 4 Moreover, the first air-cooled heat dissipation assembly 51 further includes a second fan group 514. The second fan group 514 is disposed on a side wall in the width direction of the box body 1, and the second fan group 514 is disposed opposite to the corresponding first space 11. Second air intake hole groups 515 and second heat dissipation hole groups 516 are respectively formed on opposite side walls of the box body 1 in its own width direction, and both the second air intake hole groups 515 and the second heat dissipation hole groups 516 communicate with the corresponding first space 11. The second fan group 514 is located on the side wall of the box body 1 where the second air intake hole groups 515 are formed.

[0066] The combined setting of the first fan group 511 and the second fan group 514 enables the existence of a heat dissipation air flow flowing along the length direction of the box body 1 and a heat dissipation air flow flowing along the width direction of the box body 1 in the first space 11, which can reduce the heat dead angle in the first space 11 and enhance the heat dissipation efficiency. In addition, the two first fan groups 511 and the second fan group 514 can be used alternately, and can also extend the service life of the first air-cooled heat dissipation assembly 51.

[0067] Reference Figure 1 and Figure 2 Moreover, the active heat dissipation mechanism 5 further includes a second air-cooled heat dissipation assembly 52 and a third air-cooled heat dissipation assembly 53. The second air-cooled heat dissipation assembly 52 is located in the second space 12, and the third air-cooled heat dissipation assembly 53 is located in the heat insulation space 13. The setting of the second air-cooled heat dissipation assembly 52 can independently dissipate heat from the second energy storage assembly 32, and the setting of the third air-cooled heat dissipation assembly 53 can accelerate the discharge of heat in the heat insulation space 13.

[0068] In this embodiment, the first air-cooled heat dissipation assembly 51, the second air-cooled heat dissipation assembly 52, and the third air-cooled heat dissipation assembly 53 have the same structure.

[0069] Reference Figure 3 and Figure 5 Moreover, the first energy storage assembly 31 includes a plurality of first batteries 311, and the plurality of first batteries 311 are sequentially arranged along the width direction of the box body 1.

[0070] Reference Figure 3 and Figure 5 Moreover, the lithium battery energy storage device further includes a heat dissipation enhancement mechanism 6. The heat dissipation enhancement mechanism 6 includes a plurality of first connectors 61, and the first connectors 61 are arranged in one-to-one correspondence with the first batteries 311.

[0071] Reference Figure 5 and Figure 6, the first connecting member 61 includes two heat conducting plates 611. The two heat conducting plates 611 are arranged at intervals in the width direction of the box body 1, and the first battery 311 is located between the corresponding two heat conducting plates 611. Both of the two heat conducting plates 611 are detachably connected to the side wall of the corresponding first battery 311, and the two heat conducting plates 611 between two adjacent first batteries 311 are detachably connected.

[0072] When assembling the first energy storage component 31, the setting of the first connecting member 61 enables two adjacent first batteries 311 to be connected. Moreover, due to the setting of the first connecting member 61, two adjacent first batteries 311 are arranged at intervals in sequence, which can prevent heat from accumulating between two adjacent first batteries 311. In addition, through the setting of the two heat conducting plates 611 of the first connecting member 61, the heat dissipation area of the first battery 311 can be increased, thereby increasing the heat dissipation capacity of the first battery 311.

[0073] Refer to Figure 5 and Figure 6 , heat conducting grooves 6111 are formed in the heat conducting plates 611, and the heat conducting grooves 6111 penetrate through the heat conducting plates 611 in the length direction of the box body 1. When the two heat conducting plates 611 between two adjacent first batteries 311 are connected, the corresponding two heat conducting grooves 6111 form a heat conducting hole 6112, and the depth direction of the heat conducting hole 6112 is arranged along the length direction of the box body 1. Due to the setting of the heat conducting grooves 6111 in the heat conducting plates 611, the heat dissipation area can be further increased, and the heat dissipation capacity can be improved.

[0074] Refer to Figure 7 , a first through hole 612 is formed on one side of the first battery 311 facing the heat conducting plate 611, and a second through hole 6113 is formed in the heat conducting plate 611. The first through hole 612 is formed at the bottom of the heat conducting groove 6111, and the first through hole 612 is communicated with the second through hole 6113. This enables the heat dissipation air flow in the box body 1 to blow into the first battery 311, thereby improving the heat dissipation capacity of the first battery 311.

[0075] Refer to Figure 7 and Figure 8 , a closing plate 613 is arranged on the heat conducting plate 611. The closing plate 613 is located in the corresponding heat conducting groove 6111. The length direction of the closing plate 613 is arranged along the vertical direction. One side in the width direction of the closing plate 613 is rotatably connected to the bottom of the heat conducting groove 6111, and the closing plate 613 closes the corresponding second through hole 6113. The second through hole 6113 is arranged opposite to the corresponding closing plate 613. Rotating driving members 614 are arranged on both of the two heat conducting plates 611, and the rotating driving members 614 are connected to the closing plate 613.

[0076] Driven by the rotation driving member 614, the two closing plates 613 can open or close the corresponding second through holes 6113, which can switch different heat dissipation methods, and thus can meet different requirements.

[0077] In this embodiment, referring to Figure 4 and Figure 7 , the two closing plates 613 located on the same first battery 311 rotate in the same direction. When the two closing plates 613 rotate and open, the two closing plates 613 are arranged in parallel, and an air flow port 6131 is formed between the closing plate 613 and the bottom of the corresponding heat conduction groove 6111. One air flow port 6131 is arranged in the direction of the corresponding first air inlet hole group 512, and the other air flow port 6131 is arranged in the direction of the corresponding first heat dissipation hole group 513.

[0078] When the heat dissipation air flow in the box body 1 flows along the length direction of the box body 1, when the heat dissipation air flow passes through the two closing plates 613, a negative pressure is generated on the side of the air flow port 6131 facing the first heat dissipation hole group 513. At this time, the heat in the first battery 311 will be sucked out; a positive pressure is formed on the side of the air flow port 6131 facing the first air inlet hole group 512. At this time, the heat dissipation air flow will be introduced into the corresponding first battery 311 by the corresponding closing plate 613. This can slow down the speed of the air flow in the first battery 311, and thus improve the heat dissipation efficiency.

[0079] In this embodiment, referring to Figure 7 and Figure 8 , the rotation driving member 614 includes a spring piece 6141. The spring piece 6141 is arranged between the closing plate 613 and the bottom of the corresponding heat conduction groove 6111, and both the closing plate 613 and the bottom of the corresponding heat conduction groove 6111 are connected to the spring piece 6141.

[0080] With the arrangement of the spring piece 6141, when the closing plate 613 is not stressed, the spring piece 6141 abuts against the closing plate 613 and moves in a direction away from the bottom of the corresponding heat conduction groove 6111. At this time, the closing plate 613 opens the corresponding second through hole 6113.

[0081] Referring to Figure 7 and Figure 8 , the rotation driving member 614 further includes a pressing plate 6142 and a magnetic attraction driving member 6143. The pressing plate 6142 is located on the side of the corresponding closing plate 613 away from the first battery 311, and the pressing plate 6142 is slidably connected to the bottom of the heat conduction groove 6111 and the closing plate 613 along the length direction of the box body 1. The magnetic attraction driving member 6143 is connected to the pressing plate 6142.

[0082] In this embodiment, the magnetic drive member 6143 includes a permanent magnet and an electromagnet 6144. The permanent magnet is connected to the pressing plate 6142, and the electromagnet 6144 is disposed on the corresponding heat conducting plate 611. The permanent magnet and the corresponding electromagnet 6144 are spaced apart along the sliding direction of the pressing plate 6142.

[0083] Driven by the magnetic drive member 6143, the pressing plate 6142 can slide to the outside of the corresponding closing plate 613, and then the pressing plate 6142 presses the corresponding closing plate 613 against the bottom of the corresponding heat conducting groove 6111, that is, the closing plate 613 closes the corresponding second through hole 6113. When the magnetic drive member 6143 resets, at this time, the elastic piece 6141 abuts against the pressing plate 6142 to reset, and then the closing plate 613 gradually rotates to open. At this time, the closing plate 613 also abuts against the pressing plate 6142 to slide and reset, which can realize the opening of the second through hole 6113.

[0084] In this embodiment, referring to Figure 1 and Figure 3 , a plurality of first energy storage components 31 are provided, and the plurality of first energy storage components 31 are sequentially spaced apart along the length direction of the box body 1.

[0085] Referring to Figure 3 and Figure 9 , a second connecting member 62 is further provided on the first battery 311. The second connecting member 62 has the same structure as the first connecting member 61. Two heat conducting plates 611 in the second connecting member 62 are spaced apart along the length direction of the box body 1, and both sides of the first battery 311 along the length direction of the box body 1 are detachably connected to the corresponding heat conducting plates 611.

[0086] The first connecting member 61 and the second connecting member 62 have the same function. With the combined setting of the first connecting member 61 and the second connecting member 62, the assembly of the first batteries 311 arranged in a matrix can be realized, and the heat dissipation function of the first batteries 311 arranged in a matrix can be increased.

[0087] In this embodiment, referring to Figure 3 and Figure 10 , the second energy storage component 32 has the same structure as the first energy storage component 31, and the second energy storage component 32 and the first energy storage component 31 are arranged in one-to-one correspondence. The second energy storage component 32 includes a plurality of second batteries 321. The first batteries 311 and the second batteries 321 are arranged in one-to-one correspondence. The second batteries 321 are located below the corresponding first batteries 311, and a third connecting member 63 is provided between the second batteries 321 and the corresponding first batteries 311.

[0088] Referring to Figure 3 and Figure 10 , the third connecting member 63 has the same structure as the first connecting member 61. Two heat conducting plates 611 in the third connecting member 63 are respectively detachably connected to the first battery 311 and the corresponding second battery 321.

[0089] Referring to Figure 3 , with the cooperation of the first connecting member 61, the second connecting member 62 and the third connecting member 63, the first batteries 311 arranged in a matrix and the second batteries 321 arranged in a matrix can be assembled into a whole, which facilitates the one-time installation of the entire energy storage mechanism 3 into the box body 1.

[0090] Referring to Figure 2 and Figure 11 , a relief hole 43 is formed on the first plate 41. The relief hole 43 penetrates the second plate 42 in the vertical direction, and a plurality of third connecting members 63 are all located in the relief hole 43, and a plurality of third connecting members 63 are located in the heat insulation space 13 in the vertical direction.

[0091] Referring to Figure 9 , in the first batteries 311 and the second batteries 321 arranged in a matrix, a first heat dissipation air duct 33 is formed between adjacent two rows of the first batteries 311, and a second heat dissipation air duct 34 is formed between adjacent two rows of the second batteries 321. A second heat dissipation air duct 34 is formed between adjacent two columns of the first batteries 311 and between adjacent two columns of the second batteries 321.

[0092] Referring to Figure 9 and Figure 11 , a plurality of first long plates 44 and second long plates 45 are arranged on the first plate 41. The first long plates 44 and the second long plates 45 are both located in the relief hole 43, and the first long plates 44 and the second long plates 45 are both detachably connected to the first plate 41. A plurality of first long plates 44 close a plurality of first heat dissipation air ducts 33 formed in a plurality of first batteries 311, and a plurality of second long plates 45 close a plurality of second heat dissipation air ducts 34 formed in a plurality of first batteries 311.

[0093] Similarly, a third long plate 46 and a fourth long plate 47 are arranged on the second plate 42. The third long plates 46 and the fourth long plates 47 are both located in the relief hole 43, and the third long plates 46 and the fourth long plates 47 are both detachably connected to the second plate 42. A plurality of third long plates 46 close a plurality of first heat dissipation air ducts 33 formed in a plurality of second batteries 321, and a plurality of fourth long plates 47 close a plurality of second heat dissipation air ducts 34 formed in a plurality of second batteries 321.

[0094] Referring to Figure 2 and Figure 11 , the formation of the relief hole 43 facilitates the assembly of a plurality of first batteries 311 and a plurality of second batteries 321 into the energy storage mechanism 3 outside the box body 1, and then the energy storage mechanism 3 can be installed into the box body 1 at one time. The cooperative arrangement of the first long plates 44, the second long plates 45, the third long plates 46 and the fourth long plates 47 prevents the first space 11, the heat insulation space 13 and the second space 12 from communicating.

[0095] The implementation principle of the embodiment of this application is as follows: When the lithium battery energy storage device discharges externally or charges the lithium battery energy storage device, the power manager 2 controls the first energy storage component 31 and the second energy storage component 32 to work alternately in sequence. And during this process, the first fan groups 511 and the second fan groups 514 in the first air-cooled heat dissipation component 51, the second air-cooled heat dissipation component 52, and the third air-cooled heat dissipation component 53 are used alternately in sequence.

[0096] When the working environment of the lithium battery energy storage device is poor, for example, there is a large amount of dust or the humidity is high, the closing plates 613 on all the heat conducting plates 611 rotate to close the corresponding second through holes 6113. At this time, the internal and external spaces of the first battery 311 and the second battery 321 are separated, which can protect the first battery 311 and the second battery 321.

[0097] When the working environment of the lithium battery energy storage device is good, the closing plates 613 on all the heat conducting plates 611 rotate to open the second through holes 6113. At this time, the internal and external spaces of the first battery 311 are connected, and the internal and external spaces of the second battery 321 are connected. When the first fan groups 511 and the second fan groups 514 are working, heat dissipation airflows with different flow directions are generated inside the first battery 311 and the second battery 321, which can improve the heat dissipation efficiency of the first battery 311 and the second battery 321.

[0098] This embodiment also discloses a lithium battery energy storage method, including the following steps:

[0099] Install the first energy storage component 31, the second energy storage component 32, and the heat insulation board group 4 into the box body 1, and electrically connect the first energy storage component 31 and the second energy storage component 32 to the power manager 2.

[0100] When the lithium battery energy storage device is charging or discharging externally, the power manager 2 controls the first energy storage component 31 and the second energy storage component 32 to discharge or charge alternately in sequence.

[0101] Specifically, the power management controller obtains the temperature information of the first energy storage component 31 and the second energy storage component 32 in real time, and controls the first energy storage component 31 and the second energy storage component 32 to work alternately according to the temperature information of the first energy storage component 31 and the second energy storage component 32. When the first energy storage component 31 is working, when the power manager 2 detects that the temperature of the first energy storage component 31 is too high, it stops the first energy storage component 31, and the second energy storage component 32 starts to work; similarly, when the second energy storage component 32 is working, when the power manager 2 detects that the temperature of the second energy storage component 32 is too high, it stops the second energy storage component 32, and the first energy storage component 31 starts to work.

[0102] The implementation principle of the embodiment of this application is as follows: Through the above method, the possibility of the energy storage device overheating and catching fire can be reduced.

[0103] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same component parts are denoted by the same reference numerals in the drawings. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A lithium battery energy storage device, characterized in that: include: A box body (1), wherein a heat insulation board group (4) is arranged inside the box body (1), and the heat insulation board group (4) divides the space inside the box body (1) into a first space (11) and a second space (12) which are independent of each other; A power manager (2), the power manager (2) being arranged on the box (1); The energy storage mechanism (3) comprises a first energy storage component (31) and a second energy storage component (32), wherein the first energy storage component (31) is located in the first space (11), and the second energy storage component (32) is located in the second space (12), and the first energy storage component (31) and the second energy storage component (32) are both independently electrically connected to the power manager (2), and the power manager (2) is used to control the first energy storage component (31) and the second energy storage component (32) to discharge or charge alternately; An active heat dissipation mechanism (5), the active heat dissipation mechanism (5) being arranged in the box body (1), and the active heat dissipation mechanism (5) being used to dissipate heat for the first energy storage component (31) and the second energy storage component (32); The first energy storage component (31) comprises a plurality of first batteries (311), wherein the plurality of first batteries (311) are arranged in sequence and spaced apart along the width direction of the box body (1); The first battery (311) is provided with a first connecting member (61), the first connecting member (61) comprising two heat conducting plates (611), the two heat conducting plates (611) being arranged at intervals along the width direction of the box body (1), the first battery (311) being located between the two corresponding heat conducting plates (611), the heat conducting plates (611) being connected to the side walls of the corresponding first battery (311), and the two heat conducting plates (611) between two adjacent first batteries (311) being detachably connected; The heat conducting plate (611) is in contact with the side wall of the first battery (311); a heat conducting groove (6111) is provided on a side of the heat conducting plate (611) facing away from the first battery (311); the heat conducting groove (6111) penetrates the heat conducting plate (611) along the length direction of the box body (1); A first through hole (612) is provided on the side wall of the first battery (311) facing the heat conducting plate (611), a second through hole (6113) is provided at the bottom of the heat conducting groove (6111), and the first through hole (612) is connected to the corresponding second through hole (6113).

2. A lithium battery energy storage device according to claim 1, characterized in that: The heat-insulating plate group (4) comprises a first plate (41) and a second plate (42), the first plate (41) and the second plate (42) being arranged in parallel and spaced apart, the first space (11) being located on a side of the first plate (41) away from the second plate (42), the second space (12) being located on a side of the second plate (42) away from the first plate (41), and a heat-insulating space (13) being formed between the first plate (41) and the second plate (42); The active heat dissipation mechanism (5) comprises a third air-cooling heat dissipation component (53), and the third air-cooling heat dissipation component (53) is located in the heat-insulating space (13).

3. A lithium battery energy storage device according to claim 1, characterized in that: The active heat dissipation mechanism (5) further comprises a first air-cooling heat dissipation component (51) and a second air-cooling heat dissipation component (52), wherein the first air-cooling heat dissipation component (51) is located in the first space (11), and the second air-cooling heat dissipation component (52) is located in the second space (12).

4. A lithium battery energy storage device according to claim 3, characterized in that: The first air-cooling heat dissipation component (51) comprises a first fan group (511); the box body (1) is provided with a first air inlet group (512) and a first heat dissipation hole group (513) on two opposite side walls along its length direction; the first air inlet group (512) and the first heat dissipation hole group (513) are both connected to the first space (11); The first fan group (511) is arranged on a side wall of the box body (1) on which the first air inlet hole group (512) is opened.

5. A lithium battery energy storage device according to claim 4, characterized in that: The first air-cooling heat dissipation component (51) comprises a second fan group (514); the box body (1) is provided with a second air inlet group (515) and a second heat dissipation hole group (516) on two opposite side walls along its width direction; the second air inlet group (515) and the second heat dissipation hole group (516) are both connected to the second space (12); The second fan group (514) is arranged on a side wall of the box body (1) on which the second air inlet hole group (515) is opened.

6. A lithium battery energy storage device according to claim 1, characterized in that: A closing plate (613) is provided on the heat conducting plate (611), the closing plate (613) is located in the heat conducting groove (6111), the closing plate (613) is rotatably connected to the groove bottom corresponding to the heat conducting groove (6111), a rotating driving member (614) is provided on the heat conducting plate (611), the rotating driving member (614) is connected to the closing plate (613), and the rotating driving member (614) is used to drive the closing plate (613) to rotate to close the corresponding second through hole (6113).

7. A lithium battery energy storage device according to claim 1, characterized in that: A plurality of the first energy storage components (31) are provided, and the plurality of the first energy storage components (31) are arranged in sequence and spaced apart along the length direction of the box body (1); A second connecting member (62) is also provided on the first battery (311); the first connecting member (61) and the second connecting member (62) have the same structure; the two heat conducting plates (611) in the second connecting member (62) are respectively provided on two opposite side walls of the first battery (311) along the length direction of the box body (1).

8. A lithium battery energy storage method, used in a lithium battery energy storage device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Installing the first energy storage component (31), the second energy storage component (32) and the heat insulation board group (4) into the box (1), and electrically connecting the first energy storage component (31) and the second energy storage component (32) to the power manager (2); When the lithium battery energy storage device is charged or discharged, the power manager (2) controls the first energy storage component (31) and the second energy storage component (32) to charge or discharge alternately.

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