Lithium battery controller with self-protection function

Abstract

The invention discloses a lithium battery controller with a self-protection function, and relates to the technical field of lithium battery controllers, the lithium battery controller comprises an equipment body, a cable jack is formed in the outer wall of one end of the equipment body, a positioning frame is inserted into the cable jack, an auxiliary protection mechanism is arranged in the cable jack, and the cable jack is connected with the positioning frame. A passive exhaust mechanism is further arranged in the cable jack, the auxiliary protection mechanism comprises a supporting rod fixedly connected to the inner wall of the cable jack, the end, away from the inner wall of the cable jack, of the supporting rod is rotationally connected with a guide disc, and a sliding groove is formed in the outer wall of the middle of the guide disc. A first hinge rod is slidably connected to the interior of the sliding groove, a second hinge rod is hinged to the end, away from the sliding groove, of the first hinge rod, and the second hinge rod is hinged to the outer wall of the positioning frame, so that the safety of the lithium battery in the use period is improved, the safety of an internal circuit of the equipment body is guaranteed, and damage is avoided; and the service life of the equipment body is prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery controllers, and in particular to a lithium battery controller with a self-protection function. Background Art

[0002] With the popularity of electric bicycles, some electric bicycles use lithium batteries, which not only reduces the weight of the bicycle, but also improves the endurance. In order to improve the safety of lithium batteries during use, lithium battery controllers are usually used together. Lithium battery controllers are devices used to manage the charging and discharging process of lithium batteries. They can monitor the battery status, control the charging and discharging rate, and protect the battery from adverse conditions such as overcharging, over-discharging, short circuit and overload, making it play an important role in the fields of electric bicycles, portable devices, energy storage systems, etc.

[0003] However, the prior art still has the following defects when used specifically:

[0004] The lithium battery controller is often installed inside the electric bicycle, and during use, the lithium battery cable plug needs to be connected to the lithium battery controller so that the lithium battery can be managed and monitored normally. However, during daily use, the electric bicycle's driving environment causes the vehicle to shake, which can easily cause the cable plug to become loose over time, resulting in a short circuit caused by poor contact. In severe cases, the internal circuit of the lithium battery controller will be damaged, reducing safety and shortening the service life of the equipment. At the same time, there is no warning sound when the cable plug falls off, which is not convenient for users to find and repair it in time;

[0005] In view of this, the present invention proposes a lithium battery controller with a self-protection function to compensate for and improve the deficiencies of the prior art. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a lithium battery controller with a self-protection function to solve the technical problems raised in the above background technology.

[0007] In order to achieve the above purpose, the technical solution adopted by the present invention is: a lithium battery controller with a self-protection function, including a device body, a cable jack is opened on the outer wall of one end of the device body, a positioning frame is plugged into the cable jack, an auxiliary protection mechanism is arranged inside the cable jack, and a passive exhaust mechanism is also arranged inside the cable jack.

[0008] Furthermore, the auxiliary protection mechanism includes a support rod fixedly connected to the inner wall of the cable jack, the end of the support rod away from the inner wall of the cable jack is rotatably connected to a guide disc, a slide groove is provided on the outer wall in the middle of the guide disc, a first hinged rod is slidably connected inside the slide groove, the first hinged rod is hinged to the second hinged rod at one end away from the slide groove, the second hinged rod is hinged to the outer wall of the positioning frame, the guide disc is away from the first hinged rod and has two metal sheets symmetrically fixedly connected at both sides of the slide groove, a sensor is also fixedly connected to the outer wall of the guide disc and at the bottom ends of the two metal sheets, and the first hinged rod is slidably connected to the outer wall of one end of the slide groove and has two probes symmetrically fixedly connected.

[0009] Furthermore, the contour shapes of the two probes are both trapezoidal, and the two probes are in abutment with the two metal sheets.

[0010] Furthermore, the bottom inner wall of the cable jack is fixedly connected with four guide cylinders in a rectangular orientation, the positioning frame is slidably connected to the top outer walls of the four guide cylinders, and the tops of the four guide cylinders are fixedly connected with limit strips.

[0011] Furthermore, a pressing block is fixedly connected to the bottom of the positioning frame on one side away from the guide disc, and the contour shape of the pressing block is U-shaped.

[0012] Further, the passive exhaust mechanism includes a first fixed plate fixedly connected to the inner wall of the cable jack, a sealing cylinder is fixedly connected passing through the interior of the first fixed plate, a sealing disk is slidably connected passing through the interior of the sealing cylinder, an end of the sealing disk away from the sealing cylinder is fixedly connected to a block, a side wall of the block is fixedly connected to a supporting spring, an end of the supporting spring away from the block is fixedly connected to the outer wall of the end of the sealing cylinder, an end of the sealing cylinder away from the supporting spring is fixedly connected to an air pipe, the air pipe is connected to the interior of the sealing cylinder, an end of the air pipe away from the sealing cylinder is also connected to an exhaust box, the exhaust box is fixedly connected to the side wall of the cable jack, a plurality of triangular grooves are evenly arranged on the inner wall of the exhaust box, and a plurality of air outlet holes are evenly arranged on the inner wall at the top of the triangular groove.

[0013] Furthermore, a second fixing plate is fixedly connected to the middle of the inner wall of the cable insertion hole, and support plates are symmetrically slidably connected to both sides of the outer wall of the second fixing plate.

[0014] Furthermore, two of the first fixed plates, sealing tubes, sealing disks, card blocks, support springs, air pipes and exhaust boxes are symmetrically arranged inside the cable jack with the second fixed plate as the center axis. The contours of the two card blocks are both right-angled trapezoids, and the two card blocks are in contact with the two support plates.

[0015] Furthermore, the inner walls at the bottom of the two exhaust boxes are provided with collecting grooves, and the interiors of the two collecting grooves are inclined.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] (1) By setting up an auxiliary protection mechanism, since the end of the first hinged rod away from the second hinged rod is separated from the sensor, the signal transmitted by the sensor to the control unit inside the device body is interrupted. At this time, the lithium battery stops supplying power to the electric bicycle. At the same time, the tip of the probe is in frictional contact with the two metal sheet side walls again, generating a secondary sound reminder, so that the user can know the current operating status of the device body and perform maintenance at the same time, thereby avoiding the problem of short circuit caused by poor contact between the cable plug and the cable jack, so that the device body has a self-protection power-off function, thereby improving the safety of the lithium battery during use, ensuring the safety of the internal circuit of the device body, avoiding damage, and also increasing the service life of the device body;

[0018] (2) By providing a passive exhaust mechanism, the air blown out of the air outlet can remove dust and impurities inside the cable jack. By removing the dust attached to the metal contact part inside the cable jack, poor contact and increased resistance can be avoided, thereby improving the current transmission efficiency and preventing the circuit from being poorly connected or broken. In addition, after the dust is removed, the heat generated when the current passes through is reduced, thereby avoiding overheating of the socket or plug and reducing the risk of fire. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0020] Figure 2 It is a side view stereoscopic structural schematic diagram of the present invention;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the relevant components of the positioning frame of the present invention;

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the relevant components of the guide disc of the present invention;

[0023] Figure 5 For the present invention Figure 4 A magnified view of the three-dimensional structure in the middle;

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the relevant components at the first fixing plate of the present invention;

[0025] Figure 7 For the present invention Figure 6 A magnified view of the three-dimensional structure at B in the middle;

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the relevant components of the exhaust box of the present invention.

[0027] The numbers in the figure are: 1. Equipment body; 2. Cable jack; 3. Positioning frame; 401. Support rod; 402. Guide disc; 403. Slide groove; 404. First hinge rod; 405. Second hinge rod; 406. Metal sheet; 407. Sensor; 408. Probe; 501. Guide cylinder; 502. Limit strip; 601. Pressing block; 701. First fixed plate; 702. Sealing cylinder; 703. Sealing disc; 704. Block; 705. Support spring; 706. Air pipe; 707. Exhaust box; 708. Air outlet; 801. Second fixed plate; 802. Support plate; 901. Collecting tank. DETAILED DESCRIPTION

[0028] 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;

[0029] Embodiments of the present invention

[0030] Please refer to Figures 1 to 5 As shown, a lithium battery controller with a self-protection function includes a device body 1, an outer wall of one end of the device body 1 is provided with a cable jack 2, a positioning frame 3 is plugged into the cable jack 2, and an auxiliary protection mechanism is provided inside the cable jack 2;

[0031] The auxiliary protection mechanism includes a support rod 401 fixedly connected to the inner wall of the cable jack 2, one end of the support rod 401 away from the inner wall of the cable jack 2 is rotatably connected to a guide disc 402, a slide groove 403 is provided on the outer wall in the middle of the guide disc 402, a first hinge rod 404 is slidably connected inside the slide groove 403, one end of the first hinge rod 404 away from the slide groove 403 is hinged to a second hinge rod 405, the second hinge rod 405 is hinged to the outer wall of the positioning frame 3, one end of the guide disc 402 away from the first hinge rod 404 and located on both sides of the slide groove 403 is symmetrically fixedly connected with two metal sheets 406, the outer wall of the guide disc 402 and located at the bottom of the two metal sheets 406 is also fixedly connected with a sensor 407, and one end of the first hinge rod 404 slidably connected to the inner side of the slide groove 403 is symmetrically fixedly connected with two probes 408;

[0032] The sensor 407 used in the present technical solution is a switch type sensor, and its working principle is: after being triggered by the end of the first hinge rod 404 away from the second hinge rod 405, it can connect to the control unit inside the device body 1 through an electrical signal, so that the device body 1 can operate normally;

[0033] In addition, the power supply of the sensor 407 is a DC power supply, which is usually connected to a battery, a power adapter or a DC power line to provide a stable voltage and current;

[0034] When the positioning frame 3 slides on the outer wall of the four guide cylinders 501 toward the side away from the limit strip 502, the second hinged rod 405 hinged on the outer wall of the positioning frame 3 will follow and drop in height synchronously. During this period, since the second hinged rod 405 is hingedly coordinated with the first hinged rod 404, the first hinged rod 404 will push the guide disc 402 to rotate counterclockwise toward the side of the slide groove 403, and at the same time, the end of the first hinged rod 404 away from the second hinged rod 405 will slide inside the slide groove 403 toward the side of the sensor 407, so that the probe 408 symmetrically fixedly connected to the outer wall of the first hinged rod 404 away from the second hinged rod 405 will gradually contact the two metal sheets 406. After the tip of the probe 408 contacts the side wall of the metal sheet 406, a harsh metallic sound is generated due to friction, so that the staff can know the current installation status of the cable plug. In the initial state, the guide disc 402 is in a stationary state. At this time, the two symmetrically fixedly connected metal sheets 406 are located at the bottom of the guide disc 402. When the guide disc 402 is pushed by the first hinged rod 404, it rotates counterclockwise by ninety degrees. At this time, the two symmetrically fixedly connected metal sheets 406 are located at the top of the guide disc 402, indicating that the cable plug is plugged into place with the cable jack 2. At this time, the harsh metallic sound disappears, which makes it easy for the staff to know that the cable plug is installed in place. At the same time, the first hinged rod 404 is away from the second hinged rod One end of 405 is in contact with sensor 407, and since sensor 407 is electrically connected to the control unit inside the device body 1, the purpose of circuit connectivity is achieved. At this time, the device body 1 can normally manage and monitor the lithium battery. During daily use, the electric bicycle is bumpy due to the driving environment. Over time, the cable plug is likely to become loose, causing the positioning frame 3 to carry the second hinged rod 405 to slide on the outer walls of the four guide cylinders 501 toward the side of the limit strip 502, causing the first hinged rod 404 to slide in the slide groove 403 away from the sensor 407, and at the same time causing the guide disc 402 to rotate clockwise. Since the first hinged rod 404 is away from the second hinged rod 405, the second hinged rod 405 is easily loosened. One end of the second hinged rod 405 is separated from the sensor 407, so that the signal transmitted by the sensor 407 to the control unit inside the device body 1 is interrupted. At this time, the lithium battery stops supplying power to the electric bicycle. At the same time, the tip of the symmetrically arranged probe 408 is in friction contact with the side walls of the two metal sheets 406 again, generating a secondary sound reminder, so that the user can know the current operating status of the device body 1 and perform maintenance processing simultaneously, thereby avoiding the problem of short circuit caused by poor contact between the cable plug and the cable jack 2, so that the device body 1 has a self-protection power-off function, thereby improving the safety of the lithium battery during use, ensuring the safety of the internal circuit of the device body 1, avoiding damage, and also improving the service life of the device body 1;

[0035] Please refer to Figure 3 , Figure 5As shown, as a preferred embodiment, the contour shapes of the two probes 408 are both trapezoidal, the two probes 408 are in conflict with the two metal sheets 406, the bottom inner wall of the cable jack 2 is fixedly connected with four guide cylinders 501 in a rectangular orientation, the positioning frame 3 is slidably connected to the top outer walls of the four guide cylinders 501, the tops of the four guide cylinders 501 are fixedly connected with the limiting strips 502, the bottom of the positioning frame 3 away from the guide disc 402 is fixedly connected with a pressing block 601, and the contour shape of the pressing block 601 is U-shaped;

[0036] Please refer to Figures 6 to 8 As shown, as a preferred embodiment, a passive exhaust mechanism is also provided inside the cable jack 2;

[0037] The passive exhaust mechanism includes a first fixed plate 701 fixedly connected to the inner wall of the cable jack 2, a sealing cylinder 702 is fixedly connected to the first fixed plate 701, a sealing disk 703 is slidably connected to the sealing cylinder 702, an end of the sealing disk 703 away from the sealing cylinder 702 is fixedly connected to a clamping block 704, a side wall of the clamping block 704 is fixedly connected to a supporting spring 705, an end of the supporting spring 705 away from the clamping block 704 is fixedly connected to the outer wall of the end of the sealing cylinder 702, an end of the sealing cylinder 702 away from the supporting spring 705 is fixedly connected to an air supply pipe 706, the air supply pipe 706 is communicated with the inside of the sealing cylinder 702, and an end of the air supply pipe 706 away from the sealing cylinder 702 is also connected to an exhaust box 707, the exhaust box 707 is fixedly connected to the side wall of the cable jack 2, a plurality of triangular grooves are evenly arranged on the inner wall of the exhaust box 707, and a plurality of air outlet holes 708 are evenly arranged on the inner wall at the top of the triangular groove;

[0038] Among them, the pressing block 601 fixedly connected to the bottom of the positioning frame 3 will contact the support plate 802. Since the pressing block 601 is U-shaped, the pressing block 601 can simultaneously contact the tops of the support plates 802 symmetrically arranged on both sides of the second fixed plate 801. By applying downward pressure to the two support plates 802 simultaneously, the two support plates 802 synchronously slide downward on the outer wall of the second fixed plate 801, and when the support plate 802 slides down, since the support plate 802 and the block 704 are in contact and cooperate, the support plate 802 continues to push the block 704, so that after the block 704 is squeezed, it will push the sealing disk 703 to slide inside the sealing cylinder 702 toward the side of the gas delivery pipe 706, and simultaneously squeeze the support spring 705. Since the sealing cylinder 702 is a sealed tank body, when the space inside the sealing cylinder 702 is compressed, the sealing The air inside the sealing tube 702 is squeezed, so that the air can be discharged into the exhaust box 707 through the air pipe 706. When there is air inside the exhaust box 707, the air will be discharged through the air outlet 708. In addition, by evenly opening a plurality of triangular grooves on the inner wall of the exhaust box 707, the air outlet 708 opened on the inner wall of the top of the triangular groove is opened downward, which is conducive to the air blown out of the air outlet 708 to remove dust and impurities inside the cable jack 2. By removing the dust attached to the metal contact part inside the cable jack 2, the problem of poor contact and increased resistance is avoided, and the transmission efficiency of the current is improved, so that the circuit will not be poorly connected or broken. In addition, after the dust is removed, the heat generated when the current passes through is also reduced, thereby avoiding overheating of the socket or plug and reducing the risk of fire.

[0039] Please refer to Figure 7 , Figure 8 As shown, as a preferred embodiment, a second fixing plate 801 is also fixedly connected in the middle of the inner wall of the cable jack 2, and support plates 802 are symmetrically slidably connected on both sides of the outer wall of the second fixing plate 801. Two first fixing plates 701, sealing cylinder 702, sealing disk 703, clamping block 704, support spring 705, air pipe 706 and exhaust box 707 are symmetrically arranged with the second fixing plate 801 as the central axis inside the cable jack 2. The contour shapes of the two clamping blocks 704 are both right-angled trapezoids. The two clamping blocks 704 are both in conflict with the two support plates 802. The inner walls at the bottom of the two exhaust boxes 707 are both provided with collecting grooves 901, and the insides of the two collecting grooves 901 are both inclined surfaces;

[0040] Among them, when the two support plates 802 are not squeezed by the pressure block 601, the sealing disk 703 is reset with the block 704 under the rebound action of the support spring 705. Since the block 704 is in contact with the support plate 802, the block 704 pushes the support plate 802 to slide upward on the outer wall of the second fixed plate 801, and the reset operation of the support plate 802 is completed, which is convenient for next use. By opening a collecting groove 901 on the inner wall at the bottom of the exhaust box 707, dust can be easily collected, so that the wind that is not blown out by the air outlet 708 can directly blow out the dust outside the cable jack 2 into the inside of the collecting groove 901. At the same time, the inside of the collecting groove 901 is set as an inclined surface, so as to facilitate the discharge of dust to the outside of the cable jack 2.

[0041] The following are the complete usage steps and working principles of the above embodiment:

[0042] When the device is in use, the main function of the device body 1 is to monitor the battery status, control the charging and discharging rate, and protect the battery from adverse conditions such as overcharging, overdischarging, short circuit and overload. It usually needs to be used with a cable. By inserting the cable plug into the cable jack 2, the cable jack 2 can play a role during the use of the lithium battery.

[0043] When the cable plug is inserted into the cable jack 2, it will first be engaged with the positioning frame 3. Since the inner contour of the positioning frame 3 is a rectangle, the cable plug with a rectangular outer contour just matches the positioning frame 3, so that it is easy for the cable plug to be engaged into the interior of the positioning frame 3, which plays a role of preliminary fixation and facilitates the staff to complete the plugging work quickly and accurately. Subsequently, the staff pushes the cable plug with force so that the cable plug continues to extend into the cable jack 2. In this process, since the cable plug and the positioning frame 3 are connected, the cable plug and the positioning frame 3 are integrated, so that the cable plug will synchronously carry the positioning frame 3 into the cable jack 2. During this period, the positioning frame 3 is used to slide on the outer walls of the four guide cylinders 501, so that the positioning frame 3 can remain stable during the rise and fall of the cable jack 2, which can prevent the cable plug from tilting during the insertion process, thereby affecting the fixing effect. At the same time, the four limit bars 502 fixedly connected to the top of the four guide cylinders 501 can play a role of limiting during the sliding of the positioning frame 3, thereby ensuring the stability of the device.

[0044] Due to excessive dust, dust will adhere to the metal contact part inside the cable jack 2, resulting in poor contact and increased resistance, thereby affecting the transmission efficiency of the current and even causing poor circuit connection or disconnection. In addition, excessive dust will also cause excessive heat to be generated when the current passes through, causing the socket or plug to overheat and increase the risk of fire. When the cable plug continues to extend into the cable jack 2 with the positioning frame 3, the pressing block 601 fixedly connected to the bottom of the positioning frame 3 will contact the support plate 802. Since the pressing block 601 is U-shaped, the pressing block 601 can simultaneously contact the top of the supporting plates 802 symmetrically arranged on both sides of the second fixed plate 801. By simultaneously applying downward pressure to the two supporting plates 802, the two supporting plates 802 simultaneously slide downward on the outer wall of the second fixed plate 801. When the supporting plate 802 slides down, the supporting plate 802 contacts the card block 704, so that the supporting plate 802 continues to push the card block 704, so that after the card block 704 is squeezed, it pushes the sealing disk 703 in the sealing The inside of the cylinder 702 slides toward the side of the air pipe 706, and the supporting spring 705 is squeezed synchronously. Since the sealing cylinder 702 is a sealed tank, when the space inside the sealing cylinder 702 is compressed, the air inside the sealing cylinder 702 is squeezed, so that the air can be discharged into the exhaust box 707 through the air pipe 706. When there is air in the exhaust box 707, the air will be discharged through the air outlet 708, and by evenly opening a plurality of triangular grooves on the inner wall of the exhaust box 707, the air outlet 708 opened on the inner wall of the top of the triangular groove is opened downward, which is conducive to the air blown out of the air outlet 708 to remove dust and impurities inside the cable jack 2. By removing the dust attached to the metal contact part inside the cable jack 2, the problem of poor contact and increased resistance is avoided, the transmission efficiency of the current is improved, and the circuit will not be poorly connected or broken. In addition, after the dust is removed, the heat generated when the current passes through is also reduced, thereby avoiding overheating of the socket or plug and reducing the risk of fire.

[0045] In addition, when the cable plug is inserted into the cable jack 2, when the positioning frame 3 slides on the outer walls of the four guide cylinders 501 toward the side away from the limit strip 502, the second hinged rod 405 hinged on the outer wall of the positioning frame 3 is synchronously lowered in height. During this period, since the second hinged rod 405 is hingedly coordinated with the first hinged rod 404, the first hinged rod 404 will push the guide disc 402 to rotate counterclockwise toward the side of the slide groove 403, and at the same time, the end of the first hinged rod 404 away from the second hinged rod 405 will slide inside the slide groove 403 toward the side of the sensor 407, so that the probe 408 symmetrically fixed to the outer wall of the first hinged rod 404 away from the second hinged rod 405 will gradually come into contact with the sensor 407. The two metal sheets 406 are in contact, so that after the tip of the probe 408 contacts the side wall of the metal sheet 406, a harsh metal sound is generated under the action of friction, so that the staff can know the current installation status of the cable plug. In the initial state, the guide disc 402 is in a stationary state. At this time, the two metal sheets 406 symmetrically fixedly connected are located at the bottom end of the guide disc 402. When the guide disc 402 is pushed by the first hinge rod 404, the two metal sheets 406 symmetrically fixedly connected are located at the top end of the guide disc 402, indicating that the cable plug is plugged into the cable jack 2. At this time, the harsh metal sound disappears, which makes it easy for the staff to know that the cable plug is installed in place. At the same time, the first hinge rod 40 The end away from the second hinge rod 405 is in contact with the sensor 407, and since the sensor 407 is electrically connected to the control unit inside the device body 1, the circuit connection is achieved. At this time, the device body 1 can normally manage and monitor the lithium battery. However, during daily use, the electric bicycle is bumpy due to the driving environment, which may easily cause the cable plug to become loose over time, causing the positioning frame 3 to slide the second hinge rod 405 along the outer walls of the four guide cylinders 501 toward the side of the limit strip 502, causing the first hinge rod 404 to slide in the slide groove 403 toward the side away from the sensor 407, and at the same time causing the guide disc 402 to rotate clockwise. The end away from the second hinge rod 405 is separated from the sensor 407, so that the signal transmitted by the sensor 407 to the control unit inside the device body 1 is interrupted. At this time, the lithium battery stops supplying power to the electric bicycle. At the same time, the tips of the symmetrically arranged probes 408 are in friction contact with the side walls of the two metal sheets 406 again, generating a secondary sound reminder, so that the user can know the current operating status of the device body 1 and perform maintenance processing simultaneously, thereby avoiding the problem of short circuit caused by poor contact between the cable plug and the cable jack 2, so that the device body 1 has the function of self-protection power-off, thereby improving the safety of the lithium battery during use, ensuring the safety of the internal circuit of the device body 1, avoiding damage, and also improving the service life of the device body 1.

[0046] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A lithium battery controller with a self-protection function, comprising a device body (1), wherein an outer wall at one end of the device body (1) is provided with a cable jack (2), characterized in that: A positioning frame (3) is inserted into the cable jack (2), and an auxiliary protection mechanism is provided inside the cable jack (2); Wherein, a passive exhaust mechanism is also arranged inside the cable jack (2).

2. A lithium battery controller with self-protection function according to claim 1, characterized in that: The auxiliary protection mechanism comprises a support rod (401) fixedly connected to the inner wall of the cable jack (2); one end of the support rod (401) away from the inner wall of the cable jack (2) is rotatably connected to a guide disc (402); a sliding groove (403) is provided on the outer wall in the middle of the guide disc (402); a first hinge rod (404) is slidably connected inside the sliding groove (403); one end of the first hinge rod (404) away from the sliding groove (403) is hinged to a second hinge rod (405); The second hinged rod (405) is hinged to the outer wall of the positioning frame (3); the guide disc (402) is away from one end of the first hinged rod (404) and is located on both sides of the slide groove (403) and is symmetrically fixedly connected with two metal sheets (406); the outer wall of the guide disc (402) and the bottom ends of the two metal sheets (406) are also fixedly connected with a sensor (407); the outer wall of one end of the first hinged rod (404) that is slidably connected to the inside of the slide groove (403) is symmetrically fixedly connected with two probes (408).

3. A lithium battery controller with self-protection function according to claim 2, characterized in that: The contour shapes of the two probes (408) are both trapezoidal, and the two probes (408) are in abutment with the two metal sheets (406).

4. A lithium battery controller with self-protection function according to claim 2, characterized in that: The bottom inner wall of the cable jack (2) is fixedly connected with four guide cylinders (501) in a rectangular orientation, the positioning frame (3) is slidably connected to the top outer walls of the four guide cylinders (501), and the tops of the four guide cylinders (501) are fixedly connected with limit strips (502).

5. A lithium battery controller with self-protection function according to claim 2, characterized in that: A pressing block (601) is fixedly connected to the bottom of the positioning frame (3) at a side away from the guide disc (402), and the contour shape of the pressing block (601) is U-shaped.

6. A lithium battery controller with self-protection function according to claim 1, characterized in that: The passive exhaust mechanism comprises a first fixing plate (701) fixedly connected to the inner wall of the cable jack (2); a sealing cylinder (702) is fixedly connected to the inside of the first fixing plate (701); a sealing disk (703) is slidably connected to the inside of the sealing cylinder (702); a clamping block (704) is fixedly connected to the end of the sealing disk (703) away from the sealing cylinder (702); a supporting spring (705) is fixedly connected to the side wall of the clamping block (704); and the supporting spring (705) is fixedly connected to the end of the supporting spring (705) away from the clamping block (704). An air supply pipe (706) is fixedly connected to the outer wall of the end of the sealing cylinder (702) at one end away from the support spring (705), and the air supply pipe (706) is connected to the inside of the sealing cylinder (702). The end of the air supply pipe (706) away from the sealing cylinder (702) is also connected to an exhaust box (707), and the exhaust box (707) is fixedly connected to the side wall of the cable jack (2). A plurality of triangular grooves are evenly arranged on the inner wall of the exhaust box (707), and a plurality of air outlet holes (708) are evenly arranged on the inner wall at the top of the triangular groove.

7. A lithium battery controller with self-protection function according to claim 6, characterized in that: A second fixing plate (801) is also fixedly connected in the middle of the inner wall of the cable jack (2), and support plates (802) are symmetrically slidably connected to the outer walls of the second fixing plate (801) on both sides.

8. A lithium battery controller with self-protection function according to claim 7, characterized in that: The first fixing plate (701), the sealing cylinder (702), the sealing disk (703), the clamping block (704), the supporting spring (705), the air pipe (706) and the exhaust box (707) are arranged in two symmetrical arrangements with the second fixing plate (801) as the central axis inside the cable jack (2); the contour shapes of the two clamping blocks (704) are both right-angled trapezoids, and the two clamping blocks (704) are in contact with the two supporting plates (802).

9. A lithium battery controller with self-protection function according to claim 8, characterized in that: The inner walls at the bottom of the two exhaust boxes (707) are both provided with a collecting groove (901), and the insides of the two collecting grooves (901) are both inclined surfaces.

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