A lithium battery energy storage device

Abstract

The present invention discloses a lithium battery energy storage device, which relates to the field of lithium battery technology, including an energy storage box for storing a battery body, a control panel and a connection terminal for the battery body. The energy storage box includes an ignition door for rotating upward to release the battery combustion airflow and a barrier component suspended to fall and block the heat dissipation ports on both sides of the energy storage box. The back of the ignition door is fixedly connected with a traction structure for pulling and hanging the barrier component, and the bottom of the ignition door is fixedly connected with elastic components for the ignition door to automatically judge the internal pressure of the energy storage box and disconnect. The present invention can not only reduce the damage direction of the energy storage device when a deflagration occurs and reduce the damage range of the energy storage device when a deflagration occurs, but also adopt a step-by-step pressure release method to prevent the accumulation of energy caused by the failure to release the pressure in the energy storage device, so that it will eventually burst at a certain moment to produce impact fragment damage.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium batteries, and in particular to a lithium battery energy storage device. Background Art

[0002] The existing lithium battery energy storage devices focus on basic issues such as heat dissipation and protection during the charging and discharging of lithium battery energy storage devices:

[0003] For example, the lithium battery energy storage device for electric power communication with publication number CN118249017A automatically dissipates heat and releases pressure when temperature and pressure differences occur inside and outside the shell, timely controlling the pressure difference inside and outside the shell to prevent it from further expanding. At the same time, it can prevent dust, moisture, etc. from corroding the lithium battery pack in a sealed state, thereby ensuring the service life of the device, improving the heat dissipation efficiency, and protecting the energy storage device.

[0004] A lithium battery energy storage device with announcement number CN108134022B is provided with a heat dissipation mechanism, and a heat dissipation channel is provided between the inner side walls of the shell during charging and discharging of the lithium battery. Under the action of the compressor on the shell, the heat generated by the charging interface and the discharging interface of the lithium battery can be quickly dissipated from the heat dissipation part, thereby protecting the lithium battery pack.

[0005] With the gradual strengthening and improvement of lithium battery heat dissipation effect and energy storage shell protection mechanism, people's dependence on green energy is increasing. Basic problems such as limited service life and heating have become commonplace issues. Compared with the limited service life of lithium batteries and heating during charging and discharging, people care more about safety. Therefore, the problems related to the practical application of lithium batteries have gradually shifted from heat dissipation and protection to safe use.

[0006] Lithium battery energy storage devices are generally composed of an internal lithium battery pack and an energy storage shell. Although lithium battery technology is becoming increasingly sophisticated, it is inevitable that lithium batteries will spontaneously combust due to internal / external reasons or other reasons. The lithium battery explosion phenomenon occurs rapidly and lasts for a long time. First, the internal air pressure of the lithium battery increases abnormally, causing the lithium battery to bulge or crack. When the internal gas breaks through the battery shell and comes into contact with the air, it will quickly catch fire and cause abnormally high temperature and pressure in the energy storage box. Under high temperature, high pressure and open flame environment, the remaining lithium battery packs will also be affected and explode in succession in a short period of time. Wrapped in an energy storage shell with a certain structural strength, the high-temperature and high-pressure flue gas generated by the explosion will carry open flames and be ejected from the heat dissipation holes distributed around the energy storage box. In short, once a lithium battery energy storage device explodes, a large range of high-temperature and high-pressure flue gas and open flames will be formed in a short period of time with the device shell as the center, and the risk factor is very high.

[0007] Currently, there is no better protection against lithium battery explosions. The only way is to wait for the internal materials of the lithium battery to burn out before approaching for processing. During this period, there are great safety hazards. In response to the above problems, the present invention proposes a lithium battery energy storage device that can effectively reduce the range of damage and danger of lithium battery energy storage devices in the explosion state. Summary of the invention

[0008] The technical solution of the present invention aims at the technical problem that the existing technical solutions are too simple, and provides a solution that is significantly different from the existing technologies. Specifically, the purpose of the present invention is to provide a lithium battery energy storage device to solve the problem that the internal air pressure of the lithium battery increases abnormally, causing the lithium battery to bulge or crack, and when the internal gas breaks through the battery shell and comes into contact with the air, it will quickly catch fire and cause abnormally high temperature and pressure in the energy storage box. Under the high temperature, high pressure and open flame environment, the remaining lithium battery packs will also be affected and will explode in succession in a short period of time. When wrapped in an energy storage shell with a certain structural strength, the high-temperature and high-pressure flue gas generated by the explosion will carry the open flame and be ejected from the heat dissipation holes distributed around the energy storage box. In short, once the lithium battery energy storage device explodes, a large area of ​​high-temperature and high-pressure flue gas and open flame will be formed in a short period of time with the device shell as the center, and the risk factor is very high.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lithium battery energy storage device, comprising an energy storage box for storing a battery body, a control panel and a connection terminal for the battery body, the energy storage box comprising an ignition door for rotating upward to release the battery combustion airflow and a barrier component suspended to fall and block the heat dissipation ports on both sides of the energy storage box, a traction structure for towing and suspending the barrier component is fixedly connected to the back of the ignition door, and elastic components are fixedly connected to the two sides of the bottom of the ignition door for the ignition door to automatically judge the internal pressure of the energy storage box and disconnect.

[0010] Preferably, a rotating shaft is rotatably provided at the top of the outer walls on both sides of the ignition door, and the other end of the rotating shaft is rotatably connected to the inner wall of the energy storage box, and the inner wall of the ignition door is provided with an ignition heat dissipation hole inclined downward.

[0011] Preferably, the blocking component comprises a C-shaped counterweight plate, on which a bolt adapted to seal the heat dissipation port is slidably provided, and one end of the bolt is fixedly connected to a push block.

[0012] Preferably, a spring is provided between the push block and the latch for the push block to push the latch to block the heat dissipation port.

[0013] Preferably, the traction structure includes a first connecting member fixedly connected to the top cover of the energy storage box and a second connecting member on the bottom plate, the first connecting member and the second connecting member are respectively rotatably provided with a first pulley and a second pulley, and the first pulley and the second pulley are slidably provided with a traction rope that is broken by the upward rotation of the ignition door.

[0014] Preferably, one end of the traction rope is fixedly connected to the back side of the ignition door, and the other end of the traction rope is fixedly connected to a traction line connected to a C-shaped counterweight plate.

[0015] Preferably, a second fixing member is fixedly connected to the inner wall of the C-shaped counterweight plate, and the second fixing member is wound and fixed by a traction line so that the C-shaped counterweight plate is pulled to form a suspended state.

[0016] Preferably, the elastic component includes a first fixing member fixed to the inner walls on both sides of the energy storage box and an elastic rope wound around the first fixing member, and one end of the elastic rope is fixedly connected to the bottom of the outer walls on both sides of the ignition door.

[0017] Preferably, the elastic rope is made of rubber and melts according to the combustion pressure inside the energy storage box.

[0018] Preferably, a battery mounting seat for placing the battery body is fixedly connected to the center of the top of the bottom plate of the energy storage box, and limiting blocks for tightening the traction rope are fixedly connected to the inner walls on both sides of the energy storage box.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. When one of the lithium batteries explodes, the air pressure in the energy storage box increases at the moment of the explosion, and the surrounding heat dissipation holes cannot release the high pressure instantly, which will produce an instant impact force on the ignition door, and then the ignition door is rotated and opened by stretching the elastic component below, and the traction rope used to hang the C-shaped counterweight plate is pulled off, so that the C-shaped counterweight plate falls quickly to close the heat dissipation ports on both sides, and the center of the energy storage device is lowered to increase the stability of the device during the explosion and prevent it from tipping over. After the explosion, the ignition door is quickly reset under the action of the elastic component, and the internal high-temperature and high-pressure smoke and open flames will be ejected "outward and downward" from the inclined ignition heat dissipation holes on the ignition door to reduce the damage direction of the energy storage device when the explosion occurs, and the "outward and downward" flame spraying method is used to reduce the damage range of the energy storage device when the explosion occurs;

[0021] 2. Then, with the erosion of high-temperature and high-pressure flue gas and open flames in the energy storage device, the remaining normal lithium batteries will also explode one after another, and the elastic component under the ignition door will be disconnected under the burning of the open flame. When the shock waves generated by the continuous explosion of the remaining lithium batteries in the energy storage device and the continuously generated high-temperature and high-pressure flue gas will cause the ignition door to rotate open and always maintain a certain outward opening angle, so that more violent high-temperature and high-pressure flue gas and open flames will be further "outward and downward" ejected under the diversion effect of the inclined inner side of the ignition door, and once again reduce the damage range of the energy storage device when the explosion occurs;

[0022] The present invention can not only reduce the damage direction and damage range of the energy storage device when deflagration occurs, but also adopt a step-by-step pressure release method to prevent the energy accumulation caused by the failure to release the pressure in the energy storage device, which eventually causes an explosion at a certain moment to produce impact fragment damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of another preferred angle of the overall structure of the present invention.

[0025] Figure 3 It is a schematic diagram of the ignition door of the present invention being unfolded and the ignition door, elastic rope and traction rope being broken.

[0026] Figure 4 It is a schematic diagram of the internal components with equal spacing of the overall structure of the present invention.

[0027] Figure 5 This is another preferred angle diagram of the internal components of the overall structure with equal spacing according to the present invention.

[0028] Figure 6 It is a schematic diagram of the falling state of the counterweight plate of the present invention.

[0029] Figure 7 It is a schematic diagram of the floating state of the counterweight plate of the present invention.

[0030] Figure 8 This is another preferred angle schematic diagram of the floating state of the counterweight plate of the present invention.

[0031] Fig. 9 It is a schematic diagram of the structure of the fire door of the present invention.

[0032] Fig.10 It is a cut-away cross-sectional view of the internal ignition and heat dissipation holes of the ignition door structure of the present invention.

[0033] Fig.11 This is a schematic diagram of the wiring status of the lithium battery of the present invention.

[0034] Fig.12 It is a schematic diagram of the connection state of the traction rope of the present invention.

[0035] Fig.13 It is a schematic diagram of the structure of a C-shaped counterweight plate of the present invention.

[0036] In the figure: 1. energy storage box; 101. control panel; 102. heat dissipation port; 103. limit block; 2. ignition door; 201. rotating shaft; 202. ignition heat dissipation hole; 3. first connecting member; 301. first pulley; 4. second connecting member; 401. second pulley; 5. traction rope; 501. traction line; 6. first fixing member; 7. elastic rope; 8. battery mounting seat; 9. battery body; 10. C-shaped counterweight plate; 1001. second fixing member; 11. bolt; 12. push block; 13. spring. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 creative work are within the scope of protection of the present invention.

[0038] See also Figures 1 to 13 The present invention provides a technical solution: a lithium battery energy storage device, comprising an energy storage box 1 for storing a battery body 9, a control panel 101 and a connection terminal for connecting the battery body 9, the energy storage box 1 comprising an ignition door 2 for rotating upward to release the battery combustion airflow and a barrier component suspended to fall and block the heat dissipation ports 102 on both sides of the energy storage box 1, a traction structure for traction and suspension of the barrier component is fixedly connected to the back of the ignition door 2, and elastic components for the ignition door 2 to automatically judge the internal pressure of the energy storage box 1 and disconnect are fixedly connected to the two sides of the bottom of the ignition door 2.

[0039] Specifically, when one of the groups of lithium batteries explodes, the air pressure in the energy storage box 1 increases at the moment of the explosion, and the surrounding heat dissipation holes 102 will not have time to release the high pressure instantly, which will produce an instantaneous impact force on the ignition door 2, and then the ignition door 2 will be rotated to open by stretching the elastic component below, and the traction rope 5 used to hang the C-shaped counterweight plate 10 will be broken, so that the C-shaped counterweight plate 10 will fall quickly to form a closure for the heat dissipation holes 102 on both sides. After the explosion ends, the ignition door 2 will quickly reset under the action of the elastic component, and the internal high-temperature and high-pressure flue gas and open flames will be ejected "outward and downward" from the inclined ignition heat dissipation holes 202 on the ignition door 2 to reduce the damage direction of the energy storage device when the explosion occurs, and the "outward and downward" flame spraying method is used to reduce the damage range of the energy storage device when the explosion occurs.

[0040] A rotating shaft 201 is rotatably provided at the top of the outer walls on both sides of the ignition door 2, and the other end of the rotating shaft 201 is rotatably connected to the inner wall of the energy storage box 1. The inner wall of the ignition door 2 is provided with an ignition heat dissipation hole 202 inclined downward.

[0041] Specifically, while high pressure is generated, it quickly pushes the ignition door 2 and rotates upward with the rotating shaft 201 as the axis, so that the flame and smoke are guided by the ignition heat dissipation holes 202 opened in the ignition door 2 to burn outward, so that the flame burns in an inclined downward direction, reducing damage to surrounding objects.

[0042] The blocking assembly includes a C-shaped counterweight plate 10, on which a bolt 11 is slidably provided for sealing the heat dissipation port 102, and one end of the bolt 11 is fixedly connected to a push block 12, and a spring 13 is provided between the push block 12 and the bolt 11 for the push block 12 to push the bolt 11 to seal the heat dissipation port 102.

[0043] The traction structure includes a first connecting member 3 fixedly connected to the top cover of the energy storage box 1 and a second connecting member 4 on the bottom plate, and a first pulley 301 and a second pulley 401 are rotatably arranged on the first connecting member 3 and the second connecting member 4 respectively, and a traction rope 5 is slidably arranged on the first pulley 301 and the second pulley 401 to be broken by the upward rotation of the ignition door 2, and one end of the traction rope 5 is fixedly connected to the back side of the ignition door 2, and the other end of the traction rope 5 is fixedly connected to a traction line 501 connected to the C-shaped counterweight plate 10.

[0044] The inner wall of the C-shaped counterweight plate 10 is fixedly connected with a second fixing member 1001 , and the second fixing member 1001 is wound and fixed by the traction line 501 so that the C-shaped counterweight plate 10 is pulled to form a suspended state.

[0045] Specifically, when the ignition door 2 is unfolded, the ignition door 2 breaks the traction rope 5 connected to it, and then the traction rope 5 loses traction and releases the C-shaped counterweight plate 10 from the traction suspension state, and then the C-shaped counterweight plate 10 falls, and the bolt 11 sliding on the C-shaped counterweight plate 10 releases the pressure on the inner wall of the energy storage box 1 and is aligned with the heat dissipation port 102, and then the push block 12 is rebounded by the spring 13 to push the bolt 11 into the heat dissipation port 102, thereby blocking the air from entering the energy storage box 1 from the heat dissipation port 102.

[0046] The elastic component includes a first fixing member 6 fixed to the inner walls on both sides of the energy storage box 1 and an elastic rope 7 wound around the first fixing member 6, and one end of the elastic rope 7 is fixedly connected to the bottom of the outer walls on both sides of the ignition door 2.

[0047] The elastic rope 7 is specifically made of rubber and melts according to the combustion pressure inside the energy storage box 1 .

[0048] A battery mounting seat 8 for placing a battery body 9 is fixedly connected to the center of the top of the bottom plate of the energy storage box 1, and limiting blocks 103 for tightening the traction rope 5 are fixedly connected to the inner walls on both sides of the energy storage box 1.

[0049] Specifically, the ignition door 2 will pull the elastic rope 7 when it is first deployed, and then it will be reset and closed due to the resilience of the elastic rope 7, so that the flame will be guided outward from the ignition heat dissipation hole 202 to burn. When one battery body 9 burns and drives other battery bodies 9 to burn synchronously, the high pressure in the energy storage box 1 will be generated again and the pressure will be greater. Then the high pressure will push the ignition door 2 again for the second time, and the elastic rope 7 will melt due to the increase in the combustion temperature in the energy storage box 1, so that the opening of the ignition door 2 will be larger when it is rotated and deployed for the second time, thereby guiding the flame again from the opening and the ignition heat dissipation hole 202, further increasing the range of flame guidance and reducing damage to surrounding objects.

[0050] Working principle: When using the lithium battery energy storage device, first, one of the lithium batteries bulges or cracks due to abnormal increase in internal gas pressure. Then, the internal gas breaks through the battery shell and contacts the air, which will quickly catch fire and cause abnormal high temperature and high pressure in the energy storage box 1. While generating high pressure, the high pressure quickly pushes the ignition door 2 and rotates upward with the rotating shaft 201 as the axis to unfold. At the same time, the ignition door 2 breaks the traction rope 5 connected to it, and then the traction rope 5 loses traction and releases the traction suspension state of the C-shaped counterweight plate 10. Then the C-shaped The counterweight plate 10 falls, and the latch 11 slidingly arranged on the C-shaped counterweight plate 10 releases the pressure against the inner wall of the energy storage box 1 and faces the heat dissipation port 102. Then, the push block 12 is rebounded by the spring 13 to push the latch 11 into the heat dissipation port 102, thereby blocking the air from entering the energy storage box 1 through the heat dissipation port 102. After the heat dissipation port 102 is blocked, the flame and smoke are guided by the ignition heat dissipation hole 202 opened by the ignition door 2 to burn outward, so that the flame burns in an inclined downward direction, reducing the damage to surrounding objects;

[0051] Secondly, the ignition door 2 will pull the elastic rope 7 when it is first unfolded, and then it will be reset and closed due to the resilience of the elastic rope 7, so that the flame will be guided outward from the ignition heat dissipation hole 202 to burn. When one battery body 9 burns and drives other battery bodies 9 to burn synchronously, the high pressure in the energy storage box 1 will be generated again and the pressure will be greater. Then the high pressure will push the ignition door 2 again for the second time, and the elastic rope 7 will melt due to the increase in the combustion temperature in the energy storage box 1, so that the opening of the ignition door 2 will be larger when it is rotated and unfolded for the second time, thereby guiding the flame again from the opening and the ignition heat dissipation hole 202, further increasing the range of flame guidance, and further reducing the damage to surrounding objects.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A lithium battery energy storage device, comprising an energy storage box (1), a control panel (101), a battery body (9) and a connection terminal for connecting the battery body (9), characterized in that: It also comprises an ignition door (2) for rotating upward to release the battery combustion airflow, and a barrier component that adaptively disconnects and falls down under the influence of fire to block the heat dissipation ports (102) on both sides of the energy storage box (1), wherein the back of the ignition door (2) is fixedly connected to a traction structure for traction and suspension of the barrier component, and the bottom of the ignition door (2) is fixedly connected to both sides with elastic components that can adaptively change elasticity according to changes in the internal pressure of the energy storage box (1).

2. A lithium battery energy storage device according to claim 1, characterized in that: A rotating shaft (201) is rotatably provided at the top of the outer walls on both sides of the ignition door (2), and the other end of the rotating shaft (201) is rotatably connected to the inner wall of the energy storage box (1). The inner wall of the ignition door (2) is provided with an ignition heat dissipation hole (202) inclined downward.

3. A lithium battery energy storage device according to claim 1, characterized in that: The barrier assembly comprises a C-shaped counterweight plate (10), on which a latch (11) adapted to seal the heat dissipation opening (102) is slidably provided, and one end of the latch (11) is fixedly connected to a push block (12).

4. A lithium battery energy storage device according to claim 3, characterized in that: A spring (13) is provided between the push block (12) and the latch bolt (11) for the push block (12) to push the latch bolt (11) to block the heat dissipation opening (102).

5. A lithium battery energy storage device according to claim 1, characterized in that: The traction structure comprises a first connecting member (3) fixedly connected to a top cover of the energy storage box (1) and a second connecting member (4) on a bottom plate, a first pulley (301) and a second pulley (401) being rotatably arranged on the first connecting member (3) and the second connecting member (4), and a traction rope (5) which is broken by the upward rotation of the ignition door (2) being slidably arranged on the first pulley (301) and the second pulley (401).

6. A lithium battery energy storage device according to claim 5, characterized in that: One end of the traction rope (5) is fixedly connected to the back side of the ignition door (2), and the other end of the traction rope (5) is fixedly connected to a traction line (501) connected to a C-shaped counterweight plate (10).

7. A lithium battery energy storage device according to claim 6, characterized in that: The inner wall of the C-shaped counterweight plate (10) is fixedly connected to a second fixing member (1001), and the second fixing member (1001) is wound and fixed by a traction line (501) so that the C-shaped counterweight plate (10) is pulled to form a suspended state.

8. A lithium battery energy storage device according to claim 1, characterized in that: The elastic component comprises a first fixing member (6) fixed to the inner walls on both sides of the energy storage box (1) and an elastic rope (7) wound around the first fixing member (6), one end of the elastic rope (7) being fixedly connected to the bottom of the outer walls on both sides of the ignition door (2).

9. A lithium battery energy storage device according to claim 8, characterized in that: The elastic rope (7) is specifically made of rubber and is fused according to the combustion pressure inside the energy storage box (1).

10. A lithium battery energy storage device according to claim 1, characterized in that: A battery mounting seat (8) for placing a battery body (9) is fixedly connected to the center of the top of the bottom plate of the energy storage box (1), and limiting blocks (103) for tightening the traction rope (5) are fixedly connected to the inner walls on both sides of the energy storage box (1).

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