Lithium battery energy storage device

Abstract

The invention relates to the technical field of lithium batteries, and discloses a lithium battery energy storage device which comprises a first lithium battery body and further comprises a first charging port and a first discharging port which are symmetrically formed in the front end of the first lithium battery body, and multiple sets of conducting rods are fixedly installed in the first charging port and the first discharging port; the protection mechanism is arranged in the accommodating cavity of the first lithium battery body and is used for protecting the first lithium battery body when the first lithium battery body is charged; through cooperation of a first driving assembly and a first charging and discharging assembly, a first conductive block is inserted into a first conductive groove to charge a first charging port, a second conductive block is separated from a second conductive groove to stop power supply of a first discharging port, discharging is avoided during charging, the service life of a lithium battery is prolonged, and discharging is stopped during charging; the battery can concentrate on the charging process, so that the charging efficiency is improved, the potential safety hazards of overheating, liquid leakage, fire or explosion of the battery caused by discharging while charging the battery are avoided, and meanwhile, the damage to the lithium battery is reduced.

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] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and a non-aqueous electrolyte solution. Lithium batteries can be roughly divided into two categories: lithium metal batteries and lithium-ion batteries. Lithium-ion batteries do not contain metallic lithium and are rechargeable. They are widely used in the field of transportation power sources, such as electric vehicles, electric motorcycles, etc.

[0003] The lithium batteries installed in existing electric vehicles can be discharged simultaneously while being charged. However, when the lithium batteries are charged and discharged at the same time, not only the charging power is reduced, but also the charging time is prolonged. At the same time, the lithium batteries are damaged, resulting in a reduction in the service life of the lithium batteries.

[0004] Therefore, it is necessary to provide a lithium battery energy storage device to solve the above technical problems. Summary of the invention

[0005] The purpose of the present invention is to provide a lithium battery energy storage device to solve the defects of the prior art mentioned in the above background technology. The lithium battery installed on the electric vehicle can be discharged simultaneously during charging, but when the lithium battery is charged and discharged at the same time, not only the charging power is reduced, but also the charging time is prolonged, and at the same time, the lithium battery is damaged, resulting in a reduction in the service life of the lithium battery.

[0006] Based on the above ideas, the present invention provides the following technical solutions: including a first lithium battery body, and also including a first charging port and a first discharging port symmetrically arranged at the front end of the first lithium battery body, wherein a plurality of groups of conductive rods are fixedly installed inside the first charging port and the first discharging port; and a protective mechanism arranged in the first lithium battery body accommodating cavity for protecting the first lithium battery body when charging, wherein the protective mechanism includes a first driving component and a first charging and discharging component, wherein the first driving component is arranged in the first charging port, and the first charging and discharging component is arranged on a side of the first driving component away from the first charging port; a first conductive block and a second conductive block are installed on the first charging and discharging component, and a first conductive groove and a second conductive block are fixedly installed on the inner wall of the first lithium battery body; when the charging plug is inserted into the first charging port, the first driving component and the first charging and discharging component cooperate to insert the first conductive block into the first conductive groove so that the first charging port starts charging, and the second conductive block and the second conductive groove are separated so that the first discharging port stops supplying power.

[0007] As a further solution of the present invention: the first driving component includes a disc, which is slidably sleeved on the outside of the conductive rod, a first push rod is fixedly connected to one side of the disc, and an end of the first push rod close to the accommodating cavity is set as an arc surface.

[0008] As a further solution of the present invention: the first charging and discharging assembly includes a second push rod, and the end of the second push rod close to the first push rod is set to an arc surface tangent to the first push rod, and the second push rod is connected to the inner wall of the first lithium battery body through a first spring; the first conductive block and the second conductive block are both fixedly installed on one side of the second push rod close to the front end of the first lithium battery body.

[0009] As a further solution of the present invention: a voltage sensor for real-time monitoring of the battery pack voltage and a current sensor for real-time monitoring of the battery pack charge and discharge current are installed near the front end of the first lithium battery body.

[0010] As a further solution of the present invention: a second lithium battery body is installed side by side on one side of the first lithium battery body, and the first lithium battery body and the second lithium battery body are both installed in a protective shell; a second charging port and a second discharging port are provided at the front end of the second lithium battery body; the other end of the second push rod slides through the first lithium battery body and the second lithium battery body in sequence and extends into the accommodating cavity of the second lithium battery body, a switching assembly is provided on the side of the second push rod close to the front end of the second lithium battery body, and a second charging and discharging assembly is provided on one end of the second push rod close to the accommodating cavity of the second lithium battery body; a third conductive block and a third conductive groove are installed on the side of the second charging and discharging assembly close to the switching assembly, and a third conductive groove and a fourth conductive groove are installed on the inner wall of the second lithium battery body.

[0011] As a further solution of the present invention: when the first lithium battery body is fully charged, through the cooperation of the protection mechanism, the switching component and the second charging and discharging component, the third conductive block is inserted into the third conductive slot so that the second charging port starts charging, and the fourth conductive block and the fourth conductive slot are separated so that the second discharging port stops supplying power.

[0012] As a further solution of the present invention: the switching assembly includes a threaded rod, the threaded rod passes through the support plate and rotates therewith, a second spring is sleeved on the outside of the threaded rod, the two ends of the second spring are respectively fixed to the second push rod and the inner wall of the second lithium battery body, and a smooth surface is provided on the outside of the threaded rod; the initial position of the second push rod is set at the smooth surface; and it also includes a second driving assembly for driving the second push rod to reciprocate.

[0013] As a further solution of the present invention: the second driving component includes a first gear, the first gear is fixedly installed on the outside of the threaded rod, the bottom of the first gear is meshingly connected with the second gear, and the side of the second gear away from the threaded rod is fixedly installed with a rotating rod, and the rotating rod passes through the support plate and rotates with it; an electromagnet and a magnet are installed on the outside of the rotating rod, the electromagnet and the magnet are magnetically attracted to each other, and the rotating rod is connected to the support rod through a clockwork spring.

[0014] As a further solution of the present invention: the second charge and discharge assembly includes a third push rod, the third push rod is coaxially arranged with the second push rod and located on the same horizontal line, and the third push rod is connected to the inner wall of the second lithium battery body through a third spring.

[0015] As a further solution of the present invention: a groove is formed at one end of the third push rod close to the second push rod, and a bump is formed at one end of the second push rod close to the third push rod, and the bump is matched in size to the groove.

[0016] Compared with the prior art, the beneficial effect of the present invention is that, through the cooperation of the first driving component and the first charging and discharging component, the first conductive block is inserted into the first conductive groove so that the first charging port starts charging, and the second conductive block is separated from the second conductive groove so that the first discharging port stops supplying power. No discharge occurs during charging, thereby extending the service life of the lithium battery. Discharging stops during the charging process, so that the battery can focus on the charging process, thereby improving the charging efficiency, avoiding discharging while charging the battery, causing safety hazards such as battery overheating, leakage, fire or explosion, and reducing damage to the lithium battery.

[0017] Compared with the prior art, the beneficial effect of the present invention is that, through the cooperation of the protection mechanism, the switching component and the second charging and discharging component, the third conductive block is inserted into the third conductive groove so that the second charging port starts charging, and the fourth conductive block is separated from the fourth conductive groove so that the second discharge port stops supplying power. At the same time, the first conductive block is inserted into the second conductive groove so that the first discharge port is supplied with power, and the first charging port stops charging, so that when the first lithium battery body is charged, it stops discharging itself and uses the second lithium battery body to discharge, thereby improving the charging efficiency, extending the service life of the lithium battery, improving the safety performance, reducing the damage to the lithium battery, and at the same time, normal power supply can be performed to avoid inconvenience caused by temporary power outages. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of the first lithium battery body of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the protection mechanism of the present invention;

[0022] Figure 4 is a schematic structural diagram of the first drive assembly of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the first charging and discharging assembly of the present invention;

[0024] Figure 6 is a schematic structural diagram of a first conductive block of the present invention;

[0025] Figure 7 It is a schematic diagram of the structure of the second lithium battery body of the present invention;

[0026] Figure 8 is a schematic diagram of the second push rod structure of the present invention;

[0027] Fig. 9 It is a schematic diagram of the structure of the switching component of the present invention;

[0028] Fig.10 It is a schematic diagram of the structure of the second charging and discharging assembly of the present invention.

[0029] In the figure: 1. first lithium battery body; 2. first charging port; 3. first discharging port; 4. accommodating cavity; 5. conductive rod;

[0030] 6. first driving assembly; 601. disk; 602. first push rod;

[0031] 7. first charging and discharging assembly; 701. second push rod; 702. first spring;

[0032] 8. First conductive block; 9. First conductive slot; 10. Second conductive block; 11. Second conductive slot; 12. Second lithium battery body;

[0033] 13. Switching assembly; 1301. Threaded rod; 1302. Second spring; 1303. First gear; 1304. Second gear; 1305. Electromagnet; 1306. Magnet; 1307. Clockwork spring;

[0034] 14. second charging and discharging assembly; 1401. third push rod; 1402. third spring;

[0035] 15. Third conductive block; 16. Third conductive slot; 17. Fourth conductive block; 18. Fourth conductive slot; 19. Current sensor; 20. Voltage sensor; 21. Second charging port; 22. Second discharging port. DETAILED DESCRIPTION

[0036] Embodiment 1, as Figures 1 to 6As shown, a lithium battery energy storage device includes a first lithium battery body 1, and also includes a first charging port 2 and a first discharging port 3 symmetrically arranged at the front end of the first lithium battery body 1, and multiple groups of conductive rods 5 are fixedly installed inside the first charging port 2 and the first discharging port 3; and a protective mechanism arranged in the accommodating cavity 4 of the first lithium battery body 1 for protecting the first lithium battery body 1 when charging, the protective mechanism includes a first driving component 6 and a first charging and discharging component 7, the first driving component 6 is arranged in the first charging port 2, and the first charging and discharging component 7 is arranged on the side of the first driving component 6 away from the first charging port 2; a first conductive block 8 and a second conductive block 10 are installed on the first charging and discharging component 7, and a first conductive groove 9 and a second conductive block 10 are fixedly installed on the inner wall of the first lithium battery body 1.

[0037] In this embodiment, when the charging plug is inserted into the first charging port 2, the first driving component 6 and the first charging and discharging component 7 cooperate to insert the first conductive block 8 into the first conductive groove 9 so that the first charging port 2 starts charging, and the second conductive block 10 and the second conductive groove 11 are separated so that the first discharge port 3 stops supplying power; when the charging plug is pulled out of the first charging port 2, the first conductive block 8 and the first conductive groove 9 are separated so that the first charging port 2 stops charging, and the second conductive block 10 is inserted into the second conductive groove 11 so that the first discharge port 3 supplies power, so that no discharge occurs during charging, and the service life of the lithium battery is extended. Discharging is stopped during the charging process, so that the battery can focus on the charging process, thereby improving the charging efficiency, avoiding discharging while charging the battery, causing safety hazards such as battery overheating, leakage, fire or explosion, and reducing damage to the lithium battery.

[0038] The specific structure of this embodiment is that the first driving assembly 6 includes a disk 601 , which is slidably sleeved on the outer side of the conductive rod 5 , and a first push rod 602 is fixedly connected to one side of the disk 601 .

[0039] The first charge and discharge assembly 7 includes a second push rod 701, which is connected to the inner wall of the first lithium battery body 1 through a first spring 702; the first conductive block 8 and the second conductive block 10 are both fixedly mounted on one side of the second push rod 701 close to the front end of the first lithium battery body 1.

[0040] In this embodiment, when the charging plug is inserted into the first charging port 2, the driving disc 601 moves toward the accommodating cavity 4 of the first lithium battery body 1, and the movement of the disc 601 drives the first push rod 602 to move. Since the end of the first push rod 602 close to the accommodating cavity 4 is set as an arc surface, and the end of the second push rod 701 close to the first push rod 602 is set as an arc surface tangent to the first push rod 602, the movement of the first push rod 602 can squeeze the second push rod 701 to overcome the force of the first spring 702 and move in the direction away from the first push rod 602. Figure 5-6As shown, the second push rod 701 moves to drive the first conductive block 8 to be inserted into the first conductive slot 9 so that the first charging port 2 starts charging, and the second conductive block 10 is separated from the second conductive slot 11 so that the first discharge port 3 stops supplying power;

[0041] After the first lithium battery body 1 is fully charged, the charging plug can be pulled out from the first charging port 2. When the first charging port 2 is pulled out, the second push rod 701 is moved toward the first push rod 602 by the force of the first spring 702. The first push rod 602 is reset by the squeezing of the second push rod 701. At the same time, the disc 601 moves and resets along with the first push rod 602.

[0042] A top cover is connected to the top of the first lithium battery body 1 accommodating cavity 4 by bolts. The top cover can be removed by removing the bolts to perform regular maintenance on the components in the first drive assembly 6 and the first charging and discharging assembly 7. In addition, the structure of this embodiment is relatively simple and practical.

[0043] Embodiment 2, as Figures 7 to 10 As shown, a voltage sensor 20 for real-time monitoring of the battery pack voltage and a current sensor 19 for real-time monitoring of the charge and discharge current of the battery pack are installed near the front end of the first lithium battery body 1. During the charging process, the current sensor 19 can help the battery management system control the charging speed and charging time to protect the health and life of the battery pack. The high-precision current sensor 19 can accurately measure the current of the battery pack, provide accurate data support for the battery management system, and help the battery management system to more accurately estimate the remaining power of the battery. The voltage sensor 20 is used to monitor the voltage of the battery pack in real time, thereby judging the charging status of the battery pack.

[0044] A second lithium battery body 12 is installed side by side on one side of the first lithium battery body 1, and both the first lithium battery body 1 and the second lithium battery body 12 are installed in a protective shell; a second charging port 21 and a second discharging port 22 are provided at the front end of the second lithium battery body 12; the other end of the second push rod 701 slides through the first lithium battery body 1 and the second lithium battery body 12 in sequence and extends into the accommodating cavity 4 of the second lithium battery body 12, a switching component 13 is provided on the side of the second push rod 701 close to the front end of the second lithium battery body 12, and a second charging and discharging component 14 is provided on one end of the second push rod 701 close to the accommodating cavity 4 of the second lithium battery body 12; a third conductive block 15 and a third conductive groove 16 are installed on the side of the second charging and discharging component 14 close to the switching component 13, and a third conductive groove 16 and a fourth conductive groove 18 are installed on the inner wall of the second lithium battery body 12.

[0045] In this embodiment, during the charging process of the first lithium battery body 1, the second lithium battery body 12 can be used to supply power. In the initial state of the second lithium battery body 12 supplying power, the third conductive block 15 and the third conductive slot 16 are separated from each other so that the second charging port 21 stops charging, and at the same time, the fourth conductive block 17 is inserted into the fourth conductive slot 18 so that the second discharge port 22 supplies power.

[0046] When the voltage of the first lithium battery body 1 reaches the preset full charge threshold, the voltage sensor 20 will send a signal to the battery management system or the charging control system, indicating that the first lithium battery body 1 is fully charged, and switch to the second lithium battery body 12 to continue charging. At this time, power can be supplied through the first lithium battery body 1, and the third conductive block 15 is inserted into the third conductive groove 16 through the cooperation of the protection mechanism, the switching component 13 and the second charging and discharging component 14 so that the second charging port 21 starts charging, and the fourth conductive block 17 is separated from the fourth conductive groove 18 so that the second discharge port 22 stops supplying power. At the same time, the first conductive block 8 is inserted into the second conductive groove 11 so that the first discharge port 3 is supplied with power, and the first charging port 2 stops charging;

[0047] When the first lithium battery body 1 is charging, it stops discharging itself and uses the second lithium battery body 12 to discharge, and vice versa. This improves charging efficiency, extends the service life of the lithium battery, improves safety performance, reduces damage to the lithium battery, and can also provide normal power supply to avoid inconvenience caused by temporary power outages.

[0048] The specific structure of this embodiment is that the switching component 13 includes a threaded rod 1301, the threaded rod 1301 passes through the support plate and rotates therewith, a second spring 1302 is sleeved on the outside of the threaded rod 1301, and the two ends of the second spring 1302 are respectively fixed to the second push rod 701 and the inner wall of the second lithium battery body 12, a smooth surface is provided on the outside of the threaded rod 1301, and the initial position of the second push rod 701 is set on the smooth surface; it also includes a second driving component for driving the second push rod 701 to move back and forth.

[0049] The second driving assembly includes a first gear 1303, which is fixedly mounted on the outside of the threaded rod 1301. The bottom of the first gear 1303 is meshedly connected with the second gear 1304. A rotating rod is fixedly mounted on the side of the second gear 1304 away from the threaded rod 1301. The rotating rod passes through the support plate and rotates with it. The support plate is fixedly mounted on the inner wall of the second lithium battery body 12. The threaded rod 1301 passes through the support plate and rotates with it. The function of the support plate is to support the threaded rod 1301 and the rotating rod, so that the threaded rod 1301 and the rotating rod are more stable; an electromagnet 1305 and a magnet 1306 are installed on the outside of the rotating rod. The electromagnet 1305 and the magnet 1306 are magnetically attracted to each other. The rotating rod is connected to the support rod through a clockwork spring 1307, and the support rod is fixedly mounted on the inner wall of the second lithium battery body 12.

[0050] The second charge and discharge assembly 14 includes a third push rod 1401 , which is slidably connected to the inner wall of the second lithium battery body 12 . The third push rod 1401 and the inner wall of the second lithium battery body 12 are connected via a third spring 1402 .

[0051] In this embodiment, when the charging plug is inserted into the first charging port 2, the first driving assembly 6 drives the second push rod 701 to move toward one end of the third push rod 1401, so that the second push rod 701 contacts one end of the third push rod 1401, and at the same time, the second push rod 701 slides from the smooth surface of the threaded rod 1301 to the threaded position of the threaded rod 1301, and the second push rod 701 is tightly buckled against the thread of the threaded rod 1301 by the force of the second spring 1302;

[0052] When the voltage of the first lithium battery body 1 reaches the preset full-charge threshold, the voltage sensor 20 will send a signal to the battery management system or the charging control system to power the electromagnet 1305. The multiple electromagnets 1305 and the multiple magnets 1306 are all distributed in a ring shape, and each electromagnet 1305 and the magnet 1306 are staggered. When the electromagnet 1305 is energized, a magnetic attraction is generated to attract the magnet 1306 to rotate 55 degrees. The rotation of the magnet 1306 drives the rotating rod to overcome the force of the spring 1307 and rotate, and the second gear 1304 rotates with the rotating rod. The difference in the number of teeth between the second gear 1304 and the first gear 1303 causes the second gear 1304 to rotate, which in turn drives the first gear 1303 to rotate more circles. The rotation of the first gear 1303 drives the threaded rod 1301 to rotate. The rotation of the threaded rod 1301 drives the second push rod 701 to move toward the third push rod 1401. Since the third push rod 1401 and the second push rod 701 are coaxially arranged and located on the same horizontal line, the movement of the second push rod 701 drives the third push rod 1401 to overcome the force of the third spring 1402 and move in a direction away from the first push rod 602.

[0053] The second push rod 701 moves to drive the first conductive block 8 to separate from the first conductive slot 9 and then insert it into the second conductive slot 11, so that the first discharge port 3 supplies power and the first charging port 2 stops charging. The third push rod 1401 moves along with the second push rod 701 to drive the third conductive block 15 to insert into the third conductive slot 16, so that the second charging port 21 starts charging. The fourth conductive block 17 and the fourth conductive slot 18 are separated, so that the second discharge port 22 stops supplying power.

[0054] When the voltage of the second lithium battery body 12 reaches the preset full-charge threshold, the voltage sensor 20 will send a signal to the battery management system or the charging control system to cut off the power to the electromagnet 1305. At this time, the rotating rod will rotate in the opposite direction due to the force of the clockwork spring 1307. As in the above-mentioned working principle, the rotation of the rotating rod drives the second push rod 701 to reset and contact the first push rod 602. At this time, the third push rod 1401 is reset under the force of the third spring 1402. At this time, the first lithium battery body 1 and the second lithium battery body 12 have reached the preset power, and the charging plug can be unplugged at this time.

[0055] Furthermore, a groove is provided at one end of the third push rod 1401 close to the second push rod 701, and a protrusion is provided at one end of the second push rod 701 close to the third push rod 1401, and the size of the protrusion is matched with the size of the groove. In this embodiment, when the second push rod 701 moves toward the direction of the third push rod 1401, the protrusion is driven to be inserted into the groove, and then when the switching component 13 drives the third push rod 1401 to move, the third push rod 1401 runs more stably.

[0056] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A lithium battery energy storage device, comprising a first lithium battery body (1), characterized in that: It also comprises a first charging port (2) and a first discharging port (3) symmetrically arranged at the front end of the first lithium battery body (1), wherein a plurality of groups of conductive rods (5) are fixedly installed inside the first charging port (2) and the first discharging port (3); and a protection mechanism disposed in the first lithium battery body (1) accommodating cavity (4) for protecting the first lithium battery body (1) when charging, the protection mechanism comprising a first drive component (6) and a first charge-discharge component (7), the first drive component (6) being disposed in the first charging port (2), and the first charge-discharge component (7) being disposed on a side of the first drive component (6) away from the first charging port (2); A first conductive block (8) and a second conductive block (10) are mounted on the first charging and discharging assembly (7), and a first conductive groove (9) and a second conductive block (10) are fixedly mounted on the inner wall of the first lithium battery body (1); When the charging plug is inserted into the first charging port (2), the first driving component (6) and the first charging and discharging component (7) cooperate to insert the first conductive block (8) into the first conductive slot (9) so that the first charging port (2) starts charging, and the second conductive block (10) and the second conductive slot (11) are separated so that the first discharging port (3) stops supplying power.

2. A lithium battery energy storage device according to claim 1, characterized in that: The first driving component (6) comprises a disc (601), the disc (601) being slidably sleeved on the outer side of the conductive rod (5), a first push rod (602) being fixedly connected to one side of the disc (601), and an end of the first push rod (602) close to the accommodating cavity (4) being arranged as an arc surface.

3. A lithium battery energy storage device according to claim 2, characterized in that: The first charging and discharging assembly (7) comprises a second push rod (701), one end of the second push rod (701) close to the first push rod (602) is arranged as an arc surface tangent to the first push rod (602), and the second push rod (701) is connected to the inner wall of the first lithium battery body (1) via a first spring (702); The first conductive block (8) and the second conductive block (10) are both fixedly mounted on a side of the second push rod (701) close to the front end of the first lithium battery body (1).

4. A lithium battery energy storage device according to claim 3, characterized in that: A voltage sensor (20) for real-time monitoring of the battery pack voltage and a current sensor (19) for real-time monitoring of the battery pack charge and discharge current are installed near the front end of the first lithium battery body (1).

5. A lithium battery energy storage device according to claim 4, characterized in that: A second lithium battery body (12) is installed side by side on one side of the first lithium battery body (1), and the first lithium battery body (1) and the second lithium battery body (12) are both installed in a protective shell; The front end of the second lithium battery body (12) is provided with a second charging port (21) and a second discharging port (22); The other end of the second push rod (701) slides through the first lithium battery body (1) and the second lithium battery body (12) in sequence and extends into the accommodating cavity (4) of the second lithium battery body (12); a switching assembly (13) is provided on one side of the second push rod (701) close to the front end of the second lithium battery body (12); and a second charging and discharging assembly (14) is provided on one end of the second push rod (701) close to the accommodating cavity (4) of the second lithium battery body (12); A third conductive block (15) and a third conductive slot (16) are installed on one side of the second charge and discharge assembly (14) close to the switching assembly (13), and a third conductive slot (16) and a fourth conductive slot (18) are installed on the inner wall of the second lithium battery body (12).

6. A lithium battery energy storage device according to claim 5, characterized in that: When the first lithium battery body (1) is fully charged, the third conductive block (15) is inserted into the third conductive slot (16) through the cooperation of the protection mechanism, the switching component (13) and the second charge and discharge component (14) so ​​that the second charging port (21) starts charging, and the fourth conductive block (17) and the fourth conductive slot (18) are separated so that the second discharge port (22) stops supplying power.

7. A lithium battery energy storage device according to claim 6, characterized in that: The switching assembly (13) comprises a threaded rod (1301), the threaded rod (1301) passes through the support plate and rotates with the support plate, a second spring (1302) is sleeved on the outer side of the threaded rod (1301), two ends of the second spring (1302) are respectively fixed to the second push rod (701) and the inner wall of the second lithium battery body (12), a smooth surface is arranged on the outer side of the threaded rod (1301), and the initial position of the second push rod (701) is arranged on the smooth surface; It also includes a second driving assembly for driving the second push rod (701) to reciprocate.

8. A lithium battery energy storage device according to claim 7, characterized in that: The second driving assembly comprises a first gear (1303), the first gear (1303) is fixedly mounted on the outside of the threaded rod (1301), the bottom of the first gear (1303) is meshedly connected with a second gear (1304), a rotating rod is fixedly mounted on a side of the second gear (1304) away from the threaded rod (1301), and the rotating rod penetrates the support plate and rotates with the support plate; An electromagnet (1305) and a magnet (1306) are installed on the outer side of the rotating rod. The electromagnet (1305) and the magnet (1306) are magnetically attracted to each other. The rotating rod is connected to the supporting rod via a spring (1307).

9. A lithium battery energy storage device according to claim 8, characterized in that: The second charging and discharging assembly (14) comprises a third push rod (1401), the third push rod (1401) is coaxially arranged with the second push rod (701) and located on the same horizontal line, and the third push rod (1401) is connected to the inner wall of the second lithium battery body (12) via a third spring (1402).

10. A lithium battery energy storage device according to claim 9, characterized in that: A groove is provided at one end of the third push rod (1401) close to the second push rod (701), and a protrusion is provided at one end of the second push rod (701) close to the third push rod (1401), and the size of the protrusion matches that of the groove.

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