High-safety lithium battery overcharge protection device

Abstract

The invention relates to the technical field of lithium battery protection, and discloses a high-safety lithium battery overcharge protection device which comprises a lithium battery charging mechanism, the middle position of the lithium battery charging mechanism is connected with an overcharge protection mechanism, the lithium battery charging mechanism comprises a positioning protection frame, and the middle position of the positioning protection frame is connected with a charging connection base. A limiting groove is formed in one side of the positioning protection frame; according to the invention, current input can be rapidly and thoroughly cut off when overcharge or current abnormity is detected; the driving motor drives the eccentric control frame to rotate through transmission of the positioning shaft and the positioning gear, so that the lifting protection frame, the power connection limiting frame and the protection frame are stably and quickly jacked up and move upwards; the charging plug of the lithium battery unit is quickly separated from the charging connection base, so that the complete power-off treatment of the lithium battery unit is realized; according to the design, the influence of continuously input micro current on the lithium battery unit is effectively avoided, the service life of the lithium battery is remarkably prolonged, and the charging safety of the lithium battery is remarkably improved.

Description

Technical Field

[0001] This invention belongs to the field of lithium battery protection technology, and specifically relates to a high-safety lithium battery overcharge protection device. Background Technology

[0002] Lithium-ion batteries, with their significant advantages such as high energy density, long cycle life, and no memory effect, have become the core power source for electric vehicles, portable electronic devices, and energy storage systems. However, the chemical characteristics of lithium-ion batteries make them extremely sensitive to abnormal voltage conditions. Once overcharging occurs, a series of dangerous reactions will be triggered inside the battery, such as lithium dendrite growth, separator puncture, and electrolyte decomposition. These reactions can further lead to battery swelling, leakage, and in severe cases, even combustion or explosion, posing a serious threat to the personal and property safety of users. To effectively address these issues, the industry has continuously explored and innovated, gradually developing various overcharge protection technologies. Among them, highly integrated protection chips have stood out due to their superior performance. These chips, through a single-chip design, can simultaneously achieve multiple protection functions such as overcharge and over-discharge, and the response speed can be improved to the millisecond level, greatly improving protection efficiency. At the same time, intelligent battery management systems also play an important role. Combining high-precision sensors and advanced algorithms, they can dynamically adjust protection thresholds in real time and can link with charging equipment, thus flexibly adapting to different types of batteries and complex and ever-changing usage scenarios.

[0003] In the existing technology, in the fields of electric bicycles and portable energy storage lithium batteries, lithium battery overcharge protection mainly relies on the internal chip control of the lithium battery. When the current changes, the chip control cuts off the circuit to achieve power-off processing. However, in the actual control process, there may still be a small current continuing to be transmitted after the overcharge power-off processing. If this situation continues for a long time, the lithium battery will still face the risk of overcharging, which will lead to battery damage and greatly reduce the functional stability of the lithium battery overcharge protection device. Furthermore, during the charging process of lithium batteries in this field, the current fluctuation is prone to exceed the range due to accidental contact of the charging plug, which may cause the control chip to misjudge and is not conducive to the judgment of lithium battery overcharge.

[0004] Therefore, it is necessary to invent a high-safety lithium battery overcharge protection device to solve the above problems. It can completely cut off the current input when overcharging and current changes occur, thus protecting the charging safety of lithium batteries. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides a high-safety lithium battery overcharge protection device to solve the issues raised in the background section.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-safety lithium battery overcharge protection device, comprising a lithium battery charging mechanism, wherein an overcharge protection mechanism is connected to the middle position of the lithium battery charging mechanism, wherein...

[0007] The lithium battery charging mechanism includes a positioning and protection frame, a charging connection base is connected to the middle position of the positioning and protection frame, and a limit groove is formed on one side of the positioning and protection frame.

[0008] The overcharge protection mechanism includes a protective frame that contacts the top of the positioning protective frame. A power-connecting limit frame is fixedly connected to the middle of the protective frame. A lifting protective frame is fixedly connected to the outer end of the bottom of the power-connecting limit frame. Lifting control seats are fixedly connected to the top of both sides of the inner wall of the lifting protective frame. Positioning shafts are rotatably connected to both ends of the inner wall of the positioning protective frame. Positioning gears are fixedly connected to both ends of the outer walls of the two positioning shafts. The teeth of the four positioning gears mesh with each other in pairs. An eccentric control frame is fixedly connected to one side of each of the four positioning gears. One side of each of the four eccentric control frames is connected to the bottom ends of the two lifting control seats. A drive motor is fixedly connected to the inner wall of the limiting groove. The output end of the drive motor passes through one side of the positioning protective frame and is fixedly connected to one end of one of the positioning shafts.

[0009] Preferably, the bottom end of the lifting protective frame is connected to a reset mechanism. The reset mechanism includes positioning frames fixed at both ends of the bottom of the lifting protective frame. Three positioning rods are fixedly connected to both ends of the bottom of the inner wall of the positioning protective frame. One end of the outer wall of the six positioning rods is respectively inserted and connected to one side of the two positioning frames. The other end of the outer wall of the six positioning rods is inserted and connected to a reset spring. The top end of the six positioning rods is fixedly connected to a positioning block.

[0010] Preferably, the outer wall of the lifting protective frame is provided with multiple ventilation slots, and both ends of both sides of the lifting protective frame are provided with guide slots, and the inner walls of the four guide slots correspond to the positions of the two ends of the positioning shafts respectively.

[0011] Preferably, a current sensor is fixedly connected inside the limiting groove, a timing control panel is fixedly connected to one end of the top of the positioning protection frame, a connecting wire is connected to one side of the charging connection base, and a power plug is connected to one end of the connecting wire.

[0012] Preferably, a control handle is rotatably connected to one end of the other side of the positioning protection frame, and one end of the control handle passes through the positioning protection frame and is fixedly connected to one end of one of the positioning shafts.

[0013] Preferably, a protective pad is fixedly connected to one end of the top of the positioning protective frame, and the position of the protective pad corresponds to the outer end of the bottom of the protective frame.

[0014] Preferably, a limit protection mechanism is connected to the top of the protective frame.

[0015] Preferably, the limiting protection mechanism includes a protective seat fixed to the top of the protective frame. A protective groove is formed in the middle of the protective seat. Movable frames are slidably connected to both sides of the inner wall of the protective groove. Clamping anti-slip pads are fixedly connected to the middle of one side of each of the two movable frames. Movable seats are fixedly connected to both ends of each of the two movable frames. A positioning rack is fixedly connected to one end of each of the two movable seats. A control gear is rotatably connected to one end of the inner wall of the protective groove. The tooth surfaces of the two positioning racks mesh with the two ends of the tooth surfaces of the control gear. Fixed rods are fixedly connected to both ends of both sides of the inner wall of the protective groove. A positioning spring is inserted through one end of the outer wall of each of the four fixed rods. The other ends of the outer walls of the four fixed rods are inserted through the middle of the four movable seats. A fixing block is fixedly connected to one end of each of the two fixed rods. One end of each of the other two fixed rods is fixedly connected to the inner wall of the protective groove. A protective block is fixedly connected to one side of the inner wall of the protective groove. One side of each of the two positioning racks is slidably connected to one end of the inner wall of the protective groove and one side of the protective block, respectively.

[0016] Preferably, both ends of the top of the protective seat are provided with fixing grooves, and one end of each of the two positioning racks passes through the two fixing grooves and is fixedly connected to a toggle handle.

[0017] Preferably, the charging connection base, timing control panel, current sensor and drive motor are all electrically connected to an external power source.

[0018] The technical effects and advantages of this invention are as follows:

[0019] 1. This invention, through its mechanical structure design, can quickly and completely cut off the current input when overcharging or abnormal current is detected. When the current sensor detects a change in current at the charging connection base, it immediately starts the drive motor. The drive motor, through the transmission of the positioning shaft and positioning gear, drives the eccentric control frame to rotate, thereby causing the lifting protective frame, the power connection limit frame, and the protective frame to move upwards stably and quickly. This action causes the lithium battery unit charging plug, which is engaged inside the power connection limit frame, to quickly separate from the charging connection base, thus achieving a complete power-off of the lithium battery unit. This design effectively avoids the impact of continuously input micro-currents on the lithium battery unit, significantly improving the lifespan and charging safety of the lithium battery.

[0020] 2. This invention uses a current sensor to monitor current changes in real time during the charging process. Once an abnormal current is detected, a protection mechanism will be immediately triggered to cut off the current input. At the same time, the timer control panel allows users to set a timed charging function, and users can set the charging time as needed. When the timed period is reached, the device will automatically cut off the power supply to avoid overcharging. This combination of intelligent monitoring and timed control makes it more worry-free and safe for users to use.

[0021] 3. This invention features a reset mechanism connected to the bottom of the lifting protective frame. This mechanism includes components such as a positioning frame, a positioning rod, and a reset spring. When the end of the eccentric control frame rotates away from the top, the elastic deformation of the reset spring will move the positioning frame and the lifting protective frame to their initial positions, preparing for the next protective action. The mechanical structure ensures that the device maintains stable performance even after multiple uses.

[0022] 4. The present invention, through the setting of the limiting protection mechanism, wherein the elastic deformation of the positioning spring will cause the two moving frames to drive the two clamping anti-slip pads to be stably clamped on the outer wall of the charging plug; this design effectively avoids the problem of loosening and falling off due to accidental contact, and reduces the risk of forced power-off caused by changes in internal current due to accidental loosening.

[0023] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the lithium battery overcharge protection device of the present invention;

[0026] Figure 2 This is a schematic diagram showing the distribution of the lithium battery charging mechanism and overcharge protection mechanism of the present invention;

[0027] Figure 3 This is a schematic diagram of the lithium battery charging mechanism of the present invention;

[0028] Figure 4 This is a schematic diagram of the overcharge protection mechanism of the present invention from one angle;

[0029] Figure 5 This is a schematic diagram of the overcharge protection mechanism of the present invention from angle two;

[0030] Figure 6 This is a schematic cross-sectional view of the internal structure of the lithium battery charging mechanism and overcharge protection mechanism of the present invention.

[0031] Figure 7 This is a cross-sectional view of the internal structure of the lithium battery charging mechanism and overcharge protection mechanism of the present invention from a second angle.

[0032] Figure 8 This is a schematic diagram of the reset mechanism of the present invention;

[0033] Figure 9 This is a schematic diagram showing the distribution of the limiting and protective mechanism of the present invention;

[0034] Figure 10 This is a schematic diagram of the internal structure of the limiting and protective mechanism of the present invention;

[0035] Figure 11 This is a schematic diagram showing the distribution of the fixing grooves in this invention;

[0036] Figure 12 This is a schematic diagram illustrating the movement of the two clamping anti-slip pads of the present invention.

[0037] In the diagram: 1. Lithium battery charging mechanism; 101. Positioning protection frame; 102. Connecting wire; 103. Power plug; 104. Charging connection base; 105. Timing control panel; 106. Control handle; 107. Protective pad; 108. Limiting groove; 109. Current sensor; 2. Overcharge protection mechanism; 201. Protective frame; 202. Power limiting frame; 203. Lifting protection frame; 204. Ventilation slot; 205. Guide slot; 206. Positioning shaft; 207. Positioning gear; 208. Eccentric control frame; 209. Drive motor; 210. Lifting control seat; 3. Limit protection mechanism; 301. Protective seat; 302. Protective groove; 303. Moving frame; 304. Clamping anti-slip pad; 305. Moving seat; 306. Protective block; 307. Control gear; 308. Positioning rack; 309. Fixing rod; 310. Positioning spring; 311. Fixing block; 312. Toggle handle; 313. Fixing groove; 4. Reset mechanism; 401. Positioning frame; 402. Positioning rod; 403. Reset spring; 404. Positioning block. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] This invention provides, for example Figure 1-12 The high-safety lithium battery overcharge protection device shown includes a lithium battery charging mechanism 1, with an overcharge protection mechanism 2 connected to the middle position of the lithium battery charging mechanism 1.

[0040] The lithium battery charging mechanism 1 includes a positioning and protection frame 101, a charging connection base 104 connected to the middle position of the positioning and protection frame 101, and a limiting groove 108 formed on one side of the positioning and protection frame 101.

[0041] A current sensor 109 is fixedly connected inside the limiting groove 108. A timing control panel 105 is fixedly connected to one end of the top of the positioning protection frame 101. A connecting wire 102 is connected to one side of the charging connection base 104. A power plug 103 is connected to one end of the connecting wire 102.

[0042] A control handle 106 is rotatably connected to one end of the other side of the positioning protection frame 101. One end of the control handle 106 passes through the positioning protection frame 101 and is fixedly connected to one end of one of the positioning shafts 206.

[0043] A protective pad 107 is fixedly connected to one end of the top of the positioning protective frame 101, and the position of the protective pad 107 corresponds to the outer end of the bottom of the protective frame 201.

[0044] When a high-safety lithium battery overcharge protection device is required, the lithium battery cell to be charged is electrically connected to the inner wall of the charging connection base 104, and the charging connection base 104 is electrically connected to an external power source through the connecting wire 102 and the power plug 103 to complete the lithium battery cell charging operation.

[0045] The timing control panel 105 can also control the timed charging of the lithium battery unit. When the timed period arrives, the drive motor 209 is controlled to rotate the positioning shaft 206, completely disconnecting the power supply and protecting the lithium battery unit. Within the timing range, if the current sensor 109 detects a change in current, the drive motor 209 is immediately started to completely disconnect the power supply.

[0046] As a specific embodiment of the present invention, the overcharge protection mechanism 2 includes a protective frame 201 that contacts the top of the positioning protective frame 101. A power-connecting limit frame 202 is fixedly connected to the middle position of the protective frame 201. A lifting protective frame 203 is fixedly connected to the outer end of the bottom of the power-connecting limit frame 202. Lifting control seats 210 are fixedly connected to the top of both sides of the inner wall of the lifting protective frame 203. A positioning shaft 206 is rotatably connected to both ends of the inner wall of the positioning protective frame 101. A positioning gear 207 is fixedly connected to both ends of the outer wall of the two positioning shafts 206. The tooth surfaces of the four positioning gears 207 mesh with each other in pairs. An eccentric control frame 208 is fixedly connected to one side of each of the four positioning gears 207. One side of the four eccentric control frames 208 is respectively connected to the two ends of the bottom of the two lifting control seats 210. A drive motor 209 is fixedly connected to the inner wall of the limiting groove 108. The output end of the drive motor 209 passes through one side of the positioning protective frame 101 and is fixedly connected to one end of one of the positioning shafts 206.

[0047] The outer wall of the lifting protective frame 203 is provided with multiple ventilation slots 204, and the two ends of both sides of the lifting protective frame 203 are provided with guide slots 205. The inner walls of the four guide slots 205 correspond to the positions of the two ends of the two positioning shafts 206 respectively.

[0048] When the current sensor 109 detects a change in current in the charging connection base 104, it controls the drive motor 209 to operate. The output end of the drive motor 209 passes through the positioning protection frame 101 and drives one of the positioning shafts 206 to rotate. Through the meshing rotation of the positioning gears 207 fixed to the outer wall of the positioning shaft 206, the two positioning shafts 206 respectively drive the eccentric control frames 208 at both ends to rotate, so that the four eccentric control frames 208 rotate in the same direction in pairs. The outer wall of the eccentric control frame 208 is connected to the lifting protection frame 203. The bottom end of the lifting control seat 210 on the inner wall makes contact and squeeze, so that when the far end of the eccentric control frame 208 rotates to the top, the lifting control seat 210, which is in contact with the outer wall of the eccentric control frame 208, drives the lifting protective frame 203, the power connection limit frame 202 and the protective frame 201 to move upward steadily and quickly. This causes the lithium battery unit charging plug, which is locked inside the power connection limit frame 202, to quickly separate from the charging connection base 104, so that the lithium battery unit is completely de-energized, avoiding the long-term impact of the continuously input micro current on the lithium battery unit and increasing the service life of the lithium battery.

[0049] Through mechanical structure design, the current input can be quickly and completely cut off when overcharging or abnormal current is detected. When the current sensor 109 detects a change in current in the charging connection base 104, the drive motor 209 will be started immediately. The drive motor 209 drives the eccentric control frame 208 to rotate through the positioning shaft 206 and the positioning gear 207, thereby causing the lifting protective frame 203, the power connection limit frame 202 and the protective frame 201 to move upward stably and quickly. This action causes the lithium battery unit charging plug, which is engaged inside the power connection limit frame 202, to quickly separate from the charging connection base 104, thereby achieving a complete power cut-off of the lithium battery unit. This design effectively avoids the impact of continuously input micro-current on the lithium battery unit, significantly improving the service life and charging safety of the lithium battery.

[0050] The eccentric control frame 208 can be manually controlled to rotate by the control handle 106 connected to one end of one of the positioning shafts 206. In case of abnormal power failure or special circumstances, the rotation can be manually controlled.

[0051] The current sensor 109 can monitor the current changes during the charging process in real time. Once an abnormal current is detected, the protection mechanism will be triggered immediately to cut off the current input. At the same time, the timer control panel 105 allows users to set a timed charging function. Users can set the charging time as needed. When the timed time is reached, the device will automatically cut off the power to avoid overcharging. This combination of intelligent monitoring and timed control makes it more worry-free and safe for users to use.

[0052] Multiple ventilation slots 204 located on the outer wall of the lifting protective frame 203 can achieve rapid ventilation and cooling in the event of an abnormal power outage.

[0053] In one specific embodiment of the present invention, a reset mechanism 4 is connected to the bottom end of the lifting protective frame 203. The reset mechanism 4 includes positioning frames 401 fixed at both ends of the bottom of the lifting protective frame 203. Three positioning rods 402 are fixedly connected to both ends of the bottom of the inner wall of the positioning protective frame 101. One end of the outer wall of the six positioning rods 402 is respectively inserted and connected to one side of the two positioning frames 401. The other end of the outer wall of the six positioning rods 402 is inserted and connected to a reset spring 403. The top end of the six positioning rods 402 is fixedly connected to a positioning block 404.

[0054] Positioning is achieved by positioning rod 402 fixed to the inner wall of positioning protective frame 101, so that positioning frame 401 fixed at both ends of bottom of lifting protective frame 203 is inserted and connected to one end of positioning rod 402. Through the elastic deformation of return spring 403 inserted into the outer wall of positioning rod 402 and positioning block 404 fixed at top of positioning rod 402, when the end of eccentric control frame 208 rotates away from the top, positioning frame 401 drives lifting protective frame 203, power connection limit frame 202 and protective frame 201 to move to the initial position. Contact between protective frame 201 and positioning protective frame 101 is protected by protective pad 107. The inner wall of guide groove 205 opened at both ends of bottom of lifting protective frame 203 corresponds to the two ends of positioning shaft 206 but does not contact them.

[0055] A reset mechanism 4 is connected to the bottom of the lifting protective frame 203. This mechanism includes components such as a positioning frame 401, a positioning rod 402, and a reset spring 403. When the end of the eccentric control frame 208 rotates away from the top, the elastic deformation of the reset spring 403 will drive the positioning frame 401 and the lifting protective frame 203 to move to the initial position, preparing for the next protection action. The mechanical structure ensures that the device can maintain stable performance after multiple uses.

[0056] In one specific embodiment of the present invention, the top end of the protective frame 201 is connected to a limiting protective mechanism 3;

[0057] The limiting and protective mechanism 3 includes a protective seat 301 fixed to the top of the protective frame 201. A protective groove 302 is provided in the middle of the protective seat 301. Movable frames 303 are slidably connected to both sides of the inner wall of the protective groove 302. A clamping anti-slip pad 304 is fixedly connected to the middle of one side of each of the two movable frames 303. Movable seats 305 are fixedly connected to both ends of each of the two movable seats 303. A positioning rack 308 is fixedly connected to one end of each of the two movable seats 305. A control gear 307 is rotatably connected to one end of the inner wall of the protective groove 302. The tooth surfaces of the two positioning racks 308 mesh with the two ends of the tooth surfaces of the control gear 307, respectively. Fixed rods 309 are fixedly connected to both ends of the inner wall of the protective groove 302. A positioning spring 310 is inserted through one end of the outer wall of each of the four fixed rods 309. The other ends of the outer walls of the four fixed rods 309 are inserted through the middle position of the four movable seats 305 respectively. Fixed blocks 311 are fixedly connected to one end of two fixed rods 309. The other two fixed rods 309 are fixedly connected to the inner wall of the protective groove 302. A protective block 306 is fixedly connected to one side of the inner wall of the protective groove 302. One side of each of the two positioning racks 308 is slidably connected to one end of the inner wall of the protective groove 302 and one side of the protective block 306 respectively.

[0058] The protective base 301 has a fixing groove 313 at both ends of its top. One end of each of the two positioning racks 308 passes through the two fixing grooves 313 and is fixedly connected to a toggle handle 312.

[0059] By squeezing the two lever handles 312 inwards, the two lever handles 312 drive the two positioning racks 308 to rotate through the two fixing grooves 313 respectively. By controlling the meshing rotation of the control gears 307, the two positioning racks 308 move synchronously. The two positioning racks 308 drive the two moving frames 303 to move through the two moving seats 305, so that the two moving frames 303 move along the protective grooves 302 opened inside the protective seat 301. This causes the clamping anti-slip pads 304 fixed on one side of the two moving frames 303 to move to both sides respectively, through the fixing rods 3 fixed inside the protective grooves 302. 09 is inserted and connected to the movable base 305. Through the elastic deformation of the positioning spring 310 inserted into the outer wall of the fixed rod 309, the two movable frames 303 respectively drive the two clamping anti-slip pads 304 to stably clamp on the outer wall of the charging plug of the lithium battery unit without the action of external force. The groove opened on one side of the clamping anti-slip pad 304 fits more closely with the corresponding plug outer wall for anti-slip clamping, so that the charging plug of the lithium battery unit is stably positioned during charging and when forced to disconnect the power, avoiding loosening and falling off due to accidental contact, and reducing the hidden danger of forced power disconnection caused by changes in internal current due to accidental loosening.

[0060] Before charging, the user can squeeze the lever 312 to rotate the positioning rack 308 and the control gear 307, thereby moving the two moving frames 303 along the protective groove 302. This action causes the clamping anti-slip pads 304 fixed on one side of the moving frame 303 to move to both sides, making room for the insertion of the charging plug. After the charging plug is inserted, releasing the lever 312 will cause the elastic deformation of the positioning spring 310 to cause the two moving frames 303 to drive the two clamping anti-slip pads 304 to be stably clamped on the outer wall of the charging plug. This design effectively avoids the problem of loosening and falling off due to accidental contact, and reduces the risk of forced power-off caused by changes in internal current due to accidental loosening.

[0061] In one specific embodiment of the present invention, the charging connection base 104, the timing control panel 105, the current sensor 109 and the drive motor 209 are all electrically connected to an external power supply.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-safety lithium battery overcharge protection device, comprising a lithium battery charging mechanism (1), characterized in that: The lithium battery charging mechanism (1) is connected to an overcharge protection mechanism (2) at its middle position, wherein, The lithium battery charging mechanism (1) includes a positioning protection frame (101), a charging connection base (104) is connected to the middle position of the positioning protection frame (101), and a limiting groove (108) is opened on one side of the positioning protection frame (101). The overcharge protection mechanism (2) includes a protective frame (201) that contacts the top of the positioning protective frame (101). A power-connecting limit frame (202) is fixedly connected to the middle position of the protective frame (201). A lifting protective frame (203) is fixedly connected to the outer end of the bottom of the power-connecting limit frame (202). A lifting control seat (210) is fixedly connected to the top of both sides of the inner wall of the lifting protective frame (203). A positioning shaft (206) is rotatably connected to both ends of the inner wall of the positioning protective frame (101). Both ends of the outer walls of the two positioning shafts (206) are... A positioning gear (207) is fixedly connected, and the tooth surfaces of the four positioning gears (207) mesh with each other in pairs. An eccentric control frame (208) is fixedly connected to one side of each of the four positioning gears (207). One side of each of the four eccentric control frames (208) is connected to the two ends of the bottom of the two lifting control seats (210). A drive motor (209) is fixedly connected to the inner wall of the limiting groove (108). The output end of the drive motor (209) passes through one side of the positioning protection frame (101) and is fixedly connected to one end of one of the positioning shafts (206).

2. The high-safety lithium battery overcharge protection device according to claim 1, characterized in that: The bottom end of the lifting protective frame (203) is connected to a reset mechanism (4). The reset mechanism (4) includes a positioning frame (401) fixed at both ends of the bottom of the lifting protective frame (203). Three positioning rods (402) are fixedly connected to both ends of the bottom of the inner wall of the positioning protective frame (101). One end of the outer wall of the six positioning rods (402) is inserted and connected to one side of the two positioning frames (401). The other end of the outer wall of the six positioning rods (402) is inserted and connected to a reset spring (403). The top end of the six positioning rods (402) is fixedly connected to a positioning block (404).

3. The high-safety lithium battery overcharge protection device according to claim 1, characterized in that: The outer wall of the lifting protective frame (203) is provided with multiple ventilation slots (204), and both ends of both sides of the lifting protective frame (203) are provided with guide slots (205). The inner walls of the four guide slots (205) correspond to the positions of the two ends of the two positioning shafts (206).

4. The high-safety lithium battery overcharge protection device according to claim 1, characterized in that: A current sensor (109) is fixedly connected inside the limiting groove (108), a timing control panel (105) is fixedly connected to one end of the top of the positioning protection frame (101), a connecting line (102) is connected to one side of the charging connection base (104), and a power plug (103) is connected to one end of the connecting line (102).

5. The high-safety lithium battery overcharge protection device according to claim 1, characterized in that: A control handle (106) is rotatably connected to one end of the other side of the positioning protection frame (101). One end of the control handle (106) passes through the positioning protection frame (101) and is fixedly connected to one end of one of the positioning shafts (206).

6. The high-safety lithium battery overcharge protection device according to claim 1, characterized in that: A protective pad (107) is fixedly connected to one end of the top of the positioning protective frame (101), and the position of the protective pad (107) corresponds to the outer end of the bottom of the protective frame (201).

7. The high-safety lithium battery overcharge protection device according to claim 1, characterized in that: The top of the protective frame (201) is connected to a limit protection mechanism (3).

8. The high-safety lithium battery overcharge protection device according to claim 7, characterized in that: The limiting protection mechanism (3) includes a protective seat (301) fixed to the top of the protective frame (201). A protective groove (302) is provided in the middle of the protective seat (301). Movable frames (303) are slidably connected to both sides of the inner wall of the protective groove (302). A clamping anti-slip pad (304) is fixedly connected to the middle of one side of each of the two movable frames (303). Movable seats (305) are fixedly connected to both ends of each of the two movable seats (305). A positioning rack (308) is fixedly connected to one end of each of the two movable seats (305). A control gear (307) is rotatably connected to one end of the inner wall of the protective groove (302). The tooth surfaces of the two positioning racks (308) are respectively connected to the tooth surfaces of the control gear (307). The end engagement is achieved by fixing rods (309) fixedly connected to both ends of the inner wall of the protective groove (302). A positioning spring (310) is inserted through one end of the outer wall of each of the four fixing rods (309). The other ends of the outer walls of the four fixing rods (309) are inserted through the middle positions of the four movable seats (305). A fixing block (311) is fixedly connected to one end of two of the fixing rods (309). A fixing block (306) is fixedly connected to one side of the inner wall of the protective groove (302). One side of each of the two positioning racks (308) is slidably connected to one end of the inner wall of the protective groove (302) and one side of the protective block (306).

9. A high-safety lithium battery overcharge protection device according to claim 8, characterized in that: The protective base (301) has fixed grooves (313) at both ends of its top. One end of each of the two positioning racks (308) passes through the two fixed grooves (313) and is fixedly connected to a lever handle (312).

10. A high-safety lithium battery overcharge protection device according to claim 4, characterized in that: The charging connection base (104), timing control panel (105), current sensor (109) and drive motor (209) are all electrically connected to an external power source.

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