A lithium battery charger with anti-reverse connection and application method

Abstract

The present invention relates to an anti-reverse connection lithium battery charger and an application method. The charger comprises a housing and a synchronous adjustment component, an anti-reverse connection component, a battery fixing corridor and a conveyor belt arranged inside the housing. The lithium battery moves along the battery fixing corridor through the conveyor belt; the anti-reverse connection component comprises a fixing frame, a fixing sleeve, a conductive rod, an adjustable negative electrode, a fixed positive electrode and a reset member; the fixing frame is arranged on a rack, the sleeve is vertically fixed on a side of the fixing frame close to the lithium battery, the fixed positive electrode is arranged at the bottom end of the fixing sleeve, the adjustable negative electrode is rotatably arranged in the fixing sleeve and is located on a side of the fixed positive electrode close to the lithium battery, the reset member is arranged between the fixing sleeve and the conductive rod, and an insulating layer is arranged on the outside of the conductive rod; the synchronous adjustment component drives the anti-reverse connection components on both sides based on a worm gear structure. Compared with the prior art, the present invention has the advantages of synchronous structural adjustment, reliable connection of the charging structure to the lithium battery, and the ability to charge batches of lithium batteries.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery charging, and in particular to a lithium battery charger capable of preventing reverse connection and an application method thereof. 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. In order to facilitate the repeated use of lithium batteries, lithium battery chargers are usually configured for use; in the prior art, when charging cylindrical lithium batteries, multiple lithium batteries need to be pressed in one by one in the positive and reverse directions of the charging position. After installation, the spring on the charging position will support the negative electrode of the lithium battery and provide elastic holding force, while the pole piece on the charging position will support the positive electrode of the lithium battery.

[0003] For example, utility model patent CN220732400U discloses an anti-reverse connection circuit, including a charging input terminal and a charging anti-reverse connection module; the charging input terminal matches the charger output terminal to be connected thereto to obtain electric energy, the charging input terminal is connected to a battery through the charging anti-reverse connection module to charge the battery, and the charging anti-reverse connection module connects the charging input terminal and the battery when the charger output terminal at the charging input terminal and the battery are in a positive connection state, and disconnects the charging input terminal and the battery when the charger output terminal at the charging input terminal and / or the battery are in a reverse connection state.

[0004] However, the existing circuit-based devices for identifying reverse connection of lithium batteries can only alarm for reversely connected lithium batteries, and the batteries still need to be removed and corrected in direction. This undoubtedly results in a large workload for charging batches of lithium batteries, and the efficiency of lithium battery placement and charging is low. Summary of the invention

[0005] The purpose of the present invention is to provide a lithium battery charger and application method that prevents reverse connection in order to overcome the above-mentioned prior art that determines whether a lithium battery is reversely connected through circuit identification, and still needs to correct the defects of battery placement and low charging efficiency after the lithium battery is taken out.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] The present invention provides a lithium battery charger with reverse connection protection, which is used for charging lithium batteries and includes a housing and a synchronous adjustment component, a reverse connection protection component, a battery fixing corridor and a conveyor belt arranged inside the housing;

[0008] The lithium battery is placed on a conveyor belt, which is arranged below the battery fixing corridor, and the lithium battery moves along the battery fixing corridor via the conveyor belt;

[0009] The synchronous adjustment component includes a driving motor, a synchronous transmission shaft, a transmission gear and a rack; the anti-reverse connection component includes a positive and negative electrode adjustment structure symmetrically arranged at both ends of the lithium battery, and the positive and negative electrode adjustment structure includes a fixing frame, a fixing sleeve, a conductive rod, an adjustable negative electrode, a fixed positive electrode and a reset member;

[0010] The fixing frame is arranged on the rack, the sleeve is vertically fixed on a side of the fixing frame close to the lithium battery, the fixed positive electrode is arranged at the bottom end of the fixing sleeve, the adjustable negative electrode is rotatably arranged in the fixing sleeve and is located on a side of the fixed positive electrode close to the lithium battery, the reset member is arranged between the fixing sleeve and the conductive rod, and an insulating layer is arranged on the outer side of the conductive rod;

[0011] The driving motor is connected to a synchronous transmission shaft, the synchronous transmission shaft is meshed with a transmission gear and is a worm gear structure, and the transmission gear is meshed with a rack to drive the rack to move.

[0012] Preferably, the charger also includes a control unit and a drive motor control circuit. The battery fixing corridor is an L-shaped structure. The horizontal port of the battery fixing corridor is provided with a limit plate. The inner side of the limit plate is provided with a pressure sensor. The pressure sensor is used to obtain the pressure signal of the lithium battery on the limit plate. The pressure sensor is connected to the control unit. The control unit adjusts the drive motor according to the pressure signal. The charging circuit is electrically connected to the drive motor to control the on and off of the power supply circuit of the drive motor.

[0013] Preferably, a buffer gasket is provided on one side of the limit plate close to the pressure sensor. There are multiple buffer gaskets, each of which is symmetrically arranged on both sides of the pressure sensor. The height of the buffer gasket is slightly higher than the pressure sensor.

[0014] Preferably, an elastic contact piece is provided at one end of the conductive rod close to the lithium battery, and the elastic contact piece is a strip structure, one side of the elastic contact piece is fixedly connected to the conductive rod, and the other side is in contact with and connected to a plurality of lithium batteries.

[0015] Preferably, the adjustable negative electrode comprises a fixed section, a rotating section and a return spring;

[0016] The fixed section is arranged on the fixed sleeve, one end of the fixed section is connected to the negative pole of the power supply, and the other end is rotatably connected to the rotating section. One end of the reset spring is fixed on the inner wall of the fixed sleeve, and the other end is fixed on the rotating section. The reset spring is located on the side of the rotating section away from the lithium battery.

[0017] Preferably, a side of the rotating section close to the lithium battery is provided with an elastic conductive contact point, and a side of the fixed positive electrode close to the lithium battery is provided with an elastic conductive contact point.

[0018] Preferably, positioning plates are symmetrically provided on both sides of the conveyor belt, the spacing between the two positioning plates matches the length of the lithium battery, and the upper end surface of the positioning plate is located below the lower side surface of the positive electrode protrusion of the lithium battery.

[0019] Preferably, the fixing frame is an L-shaped structure, a positioning block is provided on the upper end of the fixing frame close to the lithium battery, the lower end surface of the positioning block is an arc that matches the outer side of the lithium battery, and the rack is arranged at an angle.

[0020] Preferably, a lithium battery clamping structure is provided in the battery fixing gallery, the lithium battery clamping structure is located above the lithium battery, and the lithium battery clamping structure comprises a telescopic motor, a clamping plate and an elastic layer;

[0021] The telescopic motor is fixed at the upper end of the battery fixing gallery and drives the connected clamping plate to drive the clamping plate to move up and down. The elastic layer is arranged between the clamping plate and the lithium battery. A positioning groove is provided on the elastic layer, and the positioning groove matches the shape of the lithium battery.

[0022] The present invention also provides an application method of a lithium battery charger with reverse connection protection, comprising the following steps:

[0023] S1: Place the lithium batteries to be charged in the battery fixing corridor in sequence, with the positive or negative electrodes of each lithium battery located on the same side;

[0024] S2: The conveyor belt drives the lithium batteries to move, and each lithium battery is laid flat on the conveyor belt in turn;

[0025] S3: The driving motor drives the rack to move, so that the conductive rod of the positive and negative electrode adjustment structure contacts the lithium battery, and then moves according to the shape difference between the two ends of the lithium battery. The other end of the conductive rod is connected to the corresponding electrode to charge the lithium battery.

[0026] S4: After the lithium battery is fully charged, the batch of charged lithium batteries are taken out through the conveyor belt.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] (1) This solution places the lithium battery in the battery fixing corridor, moves the lithium battery to the preset position through the conveyor belt, drives the synchronous transmission shaft and the transmission gear to move, and then drives the racks on both sides of the conveyor belt to drive the positive and negative electrode adjustment structures set on the fixing frame to move synchronously; the conductive rod contacts the electrode of the lithium battery, and the conductive rod contacting the positive electrode of the lithium battery is pushed backward due to the height of the positive electrode protrusion, so that the adjustable negative electrode is retracted and located on the side of the conductive rod. Since the outer side of the conductive rod is provided with an insulating layer, the conductive rod is not connected to the negative electrode of the power source, and contacts with the fixed positive electrode at the rear to achieve selective positive electrode connection. Since the negative electrode has no protrusion height, the conductive rod contacts and connects with the negative electrode of the power source, so that the lithium battery completes the pairing charging. When the lithium battery is completely charged and disengaged, the conductive rod is reset under the action of the reset member for the next lithium battery charging.

[0029] Since the positive and negative pole adjustment structures at both ends of the lithium battery are symmetrically arranged, no matter the positive pole of the battery is on the left or on the right, the conductive rod can be adjusted by utilizing the height of the lithium battery protrusion so that the other end of the conductive rod corresponds to the positive and negative poles of the corresponding lithium battery, which can fundamentally avoid the reverse connection of the battery. Moreover, compared with the existing method of preventing reverse connection through circuit control, the reverse connection can be solved from the root. The circuit will produce a sudden change of current during the positive and negative switching process, causing damage to the circuit. The structure of the present application is simple, accurate and safe. The arrangement of the battery fixing corridor and the transmission belt can charge multiple batteries and improve the scope of application of the device.

[0030] (2) This solution blocks the exit end of the battery fixing corridor through a limit plate when the lithium battery is being charged. After charging is completed, the limit plate can be opened to directly take out the lithium battery through a conveyor belt, thereby improving the overall efficiency. On the other hand, the pressure signal generated by the contact between the limit plate and the lithium battery is used to feedback the number of batteries in the battery fixing corridor. When the preset number is reached, the drive motor moves, driving the positive and negative pole adjustment structure on the rack to move and contact the two ends of the lithium battery, and the charging port is matched by the presence or absence of protrusions on the positive and negative poles of the lithium battery. When the match is correct, the drive motor control circuit disconnects the power supply of the drive motor to stop it. The corresponding pressure signals generated by the lithium battery and the device are used to control the action of the charging structure, which further simplifies the operation steps and improves the charging efficiency of the lithium battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic diagram of the structure of the anti-reverse connection charger provided by the present invention;

[0032] Figure 2 The AA cross-sectional view of the front view of the anti-reverse connection charger provided by the present invention;

[0033] Figure 3The BB section view of the left side view of the anti-reverse connection charger provided by the present invention;

[0034] Figure 4 A CC cross-sectional view of a top view of the anti-reverse connection charger provided by the present invention;

[0035] Figure 5 for Figure 2 Enlarged view of point D in the middle;

[0036] Figure 6 for Figure 2 Enlarged view of point E in the middle;

[0037] Figure 7 The present invention provides a flowchart of an application method of an anti-reverse connection charger.

[0038] In the figure: 1. shell, 2. synchronous adjustment component, 3. anti-reverse connection component, 4. battery fixing corridor, 5. conveyor belt, 6. lithium battery, 7. limit plate, 21. drive motor, 22. synchronous transmission shaft, 23 transmission gear, 24 rack, 31. fixed frame, 32. fixed sleeve, 33. conductive rod, 34. adjustable negative pole, 35. fixed positive pole, 36. reset member, 37. insulating layer, 38. elastic contact piece, 39. positioning block, 341. fixed section, 342. rotating section, 343. reset spring, 344. conductive contact point, 51. positioning plate, 71. pressure sensor. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0041] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0042] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0043] It should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0044] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] Example 1

[0046] like Figures 1 to 6 As shown, this embodiment provides a lithium battery charger with reverse connection protection, which is used to charge a lithium battery 6, and includes a housing 1 and a synchronous adjustment component 2, a reverse connection protection component 3, a battery fixing gallery 4 and a conveyor belt 5 arranged inside the housing 1;

[0047] The lithium battery 6 is placed on a conveyor belt 5, and the conveyor belt 5 is arranged below the battery fixing corridor 4. The lithium battery 6 moves along the battery fixing corridor 4 through the conveyor belt 5;

[0048] The synchronous adjustment component 2 includes a driving motor 21, a synchronous transmission shaft 22, a transmission gear 23 and a rack 24; the anti-reverse connection component 3 includes a positive and negative electrode adjustment structure symmetrically arranged at both ends of the lithium battery 6, and the positive and negative electrode adjustment structure includes a fixing frame 31, a fixing sleeve 32, a conductive rod 33, an adjustable negative electrode 34, a fixed positive electrode 35 and a reset member 36;

[0049] The fixing frame 31 is arranged on the rack 24, the sleeve 32 is vertically fixed on the side of the fixing frame 31 close to the lithium battery 6, the fixed positive electrode 35 is arranged at the bottom end of the fixing sleeve 32, the adjustable negative electrode 34 is rotatably arranged in the fixing sleeve 32 and is located on the side of the fixed positive electrode 35 close to the lithium battery 6, the reset member 36 is arranged between the fixing sleeve 32 and the conductive rod 33, and the outer side of the conductive rod 33 is provided with an insulating layer 37;

[0050] The driving motor 21 is connected to the synchronous transmission shaft 22 , and the synchronous transmission shaft 22 is meshed with the transmission gear 23 , and is a worm gear structure. The transmission gear 23 is meshed with the rack 24 to drive the rack 24 to move.

[0051] Working principle: the lithium battery 6 is placed in the battery fixing corridor 4, and the lithium battery 6 is moved to the preset position by the conveyor belt 5. The driving motor 21 drives the synchronous transmission shaft 22 and the transmission gear 23 to move, and then the racks 24 on both sides of the conveyor belt 5 drive the positive and negative electrode adjustment structures set on the fixing frame 31 to move synchronously; the conductive rod 33 contacts the electrode of the lithium battery 6, and the conductive rod 33 contacting the positive electrode of the lithium battery 6 is pushed backward due to the height of the positive electrode protrusion, so that the adjustable negative electrode 34 is retracted and located on the side of the conductive rod 33. Since an insulating layer is provided on the outer side of the conductive rod 33, the conductive rod 33 is not connected with the negative electrode of the power supply, and contacts with the fixed positive electrode 35 at the rear to realize selective positive electrode connection. Since the negative electrode has no protrusion height, the conductive rod 33 contacts and connects with the negative electrode of the power supply, so that the lithium battery completes the pairing charging. When the lithium battery is charged and disengaged, the conductive rod 33 is reset under the action of the reset member 36 for the next lithium battery charging.

[0052] Since the positive and negative pole adjustment structures at both ends of the lithium battery are symmetrically arranged, no matter the positive pole of the battery is on the left or on the right, the conductive rod 33 can be adjusted by utilizing the height of the lithium battery protrusion so that the other end of the conductive rod corresponds to the positive and negative poles of the corresponding lithium battery 6, which can fundamentally avoid the reverse connection of the battery. Moreover, compared with the existing method of preventing reverse connection through circuit control, the reverse connection can be solved from the root. The circuit will produce a sudden change of current during the positive and negative switching process, causing damage to the circuit. The structure of the present application is simple, accurate and safe. The arrangement of the battery fixing corridor 4 and the transmission belt 5 can charge multiple batteries and improve the scope of application of the device.

[0053] In a preferred embodiment, the charger also includes a control unit and a drive motor control circuit. The battery fixing corridor 4 is an L-shaped structure. The horizontal port of the battery fixing corridor 4 is provided with a limit plate 7. A pressure sensor 71 is provided on the inner side of the limit plate 7. The pressure sensor 71 is used to obtain the pressure signal of the lithium battery 6 on the limit plate. The pressure sensor is connected to the control unit. The control unit adjusts the drive motor according to the pressure signal. The charging circuit is electrically connected to the drive motor 21 to control the on and off of the power supply circuit of the drive motor 21.

[0054] Specifically, a buffer gasket is provided on one side of the limit plate 7 close to the pressure sensor. There are multiple buffer gaskets, each of which is symmetrically arranged on both sides of the pressure sensor. The height of the buffer gasket is slightly higher than the pressure sensor.

[0055] When the lithium battery is charging, the exit end of the battery fixing corridor 4 is blocked by the limit plate 7. After charging is completed, the limit plate 7 can be opened to directly take out the lithium battery through the conveyor belt, thereby improving the overall efficiency. On the other hand, the pressure signal generated by the contact between the limit plate 7 and the lithium battery is used to feedback the number of batteries in the battery fixing corridor 4. When the preset number is reached, the drive motor moves, driving the positive and negative pole adjustment structure on the rack to move and contact the two ends of the lithium battery, and the charging port of the lithium battery is matched by the presence or absence of protrusions on the positive and negative poles of the lithium battery. When the match is correct, the drive motor control circuit disconnects the power supply of the drive motor to stop it. The corresponding pressure signals generated by the lithium battery and the device are used to control the action of the charging structure, which further simplifies the operating steps and improves the charging efficiency of the lithium battery.

[0056] Specifically, an elastic contact piece 38 is provided at one end of the conductive rod 33 close to the lithium battery 6 . The elastic contact piece 38 is a strip-shaped structure. One side of the elastic contact piece 38 is fixedly connected to the conductive rod 33 , and the other side contacts and connects to multiple lithium batteries 6 .

[0057] The adjustable negative electrode 34 includes a fixed section 341, a rotating section 342 and a return spring 343;

[0058] The fixed section 341 is arranged on the fixed sleeve 32, one end of the fixed section 341 is connected to the negative pole of the power supply, and the other end can be rotatably connected to the rotating section 342. One end of the reset spring 343 is fixed on the inner wall of the fixed sleeve 32, and the other end is fixed on the rotating section 342. The reset spring 343 is located on the side of the rotating section 342 away from the lithium battery 6.

[0059] Specifically, a resilient conductive contact point 344 is provided on the side of the rotating section 342 close to the lithium battery 6, and a resilient conductive contact point 344 is provided on the side of the fixed positive electrode 35 close to the lithium battery 6. Positioning plates 51 are symmetrically provided on both sides of the conveyor belt 5, and the spacing between the two positioning plates 51 matches the length of the lithium battery 6, and the upper end surface of the positioning plate 51 is located below the lower side surface of the positive electrode protrusion of the lithium battery 6. The fixing frame 31 is an L-shaped structure, and a positioning block 39 is provided on the upper end of the fixing frame 31 close to the lithium battery. The lower end surface of the positioning block 39 is an arc that matches the outer side of the lithium battery 6, and the rack 24 is tilted.

[0060] Furthermore, the shell 1 includes an upper shell and a lower shell. One end of the upper shell can be rotatably fixed to one end of the lower shell, and the other end is connected to the lower shell by a snap. When the adjustment structure and the detection structure inside the shell fail, the upper shell can be opened and the internal structure can be repaired, thereby improving the efficiency of subsequent maintenance and reducing the cost of subsequent maintenance.

[0061] In a preferred embodiment, a lithium battery clamping structure is provided in the battery fixing gallery 4, the lithium battery clamping structure is located above the lithium battery 6, and the lithium battery clamping structure includes a telescopic motor, a clamping plate and an elastic layer;

[0062] The telescopic motor is fixed at the upper end of the battery fixing gallery 4 and drives the connected clamping plate to drive the clamping plate to move up and down. The elastic layer is arranged between the clamping plate and the lithium battery 6. The elastic layer is provided with a positioning groove, and the positioning groove matches the shape of the lithium battery 6.

[0063] The pressing plate is driven up and down by a telescopic motor, and the positioning grooves that match the shape of the lithium battery 6 are arranged on the elastic layer to clamp the position of each lithium battery, thereby avoiding the movement problem caused by the instability of the lithium battery during charging, and improving the safety and reliability of the charging device.

[0064] like Figure 7 As shown, this embodiment also provides an application method of a lithium battery charger with reverse connection protection, comprising the following steps:

[0065] S1: placing the lithium batteries to be charged into the battery fixing corridor 4 in sequence, with the positive or negative electrodes of each lithium battery located on the same side;

[0066] S2: The conveyor belt 5 drives the lithium batteries 6 to move, and each lithium battery 6 is laid flat on the conveyor belt 5 in sequence;

[0067] S3: The driving motor 21 drives the rack 24 to move, so that the conductive rod 33 of the positive and negative electrode adjustment structure contacts the lithium battery 6, and then moves according to the shape difference between the two ends of the lithium battery, and the other end of the conductive rod 33 is connected to the corresponding electrode to charge the lithium battery;

[0068] S4: After the lithium battery is fully charged, the batch of charged lithium batteries are taken out through the conveyor belt 5.

[0069] In combination with the above preferred implementations, this embodiment further provides a more specific application method based on the anti-reverse connection charger of this embodiment, comprising the following steps:

[0070] Close the limit plate 7, and place the lithium batteries to be charged into the battery fixing gallery 4 in sequence, with the positive or negative electrodes of each lithium battery located on the same side;

[0071] The conveyor belt 5 drives the lithium battery 6 to move, and each lithium battery 6 is laid flat on the conveyor belt 5 in sequence; the pressure signal generated by the pressure sensor on the lithium battery contact limit plate 7 on the conveyor belt 5 is transmitted to the control unit to compare the pressure signal;

[0072] When the pressure signal meets the conditions, the telescopic motor drives the pressing plate to move downward, and uses the positioning grooves on the elastic layer to position each lithium battery. Then the driving motor 21 drives the rack 24 to move, so that the conductive rod 33 of the positive and negative electrode adjustment structure contacts the lithium battery 6, and then moves according to the shape difference between the two ends of the lithium battery. The other end of the conductive rod 33 is connected to the corresponding electrode to charge the lithium battery.

[0073] After the lithium battery is fully charged, the telescopic motor drives the pressing plate to move upward, and opens the limit plate 7, and the batch of charged lithium batteries is taken out through the conveyor belt 5.

[0074] The worm gear transmission makes the movement synchronization of the charging structures at both ends of the lithium battery stronger, ensuring the accuracy of lithium battery charging. The start and stop of the transmission structure are controlled by electrical signals, further improving the automation and accuracy of the device action.

[0075] The preferred specific embodiments of the present invention are described in detail above. It should be understood that a person skilled in the art can make many modifications and changes based on the concept of the present invention without creative work. Therefore, any technical solution that can be obtained by a person skilled in the art through logical analysis, reasoning or limited experiments based on the concept of the present invention on the basis of the prior art should be within the scope of protection determined by the claims.

Claims

1. A lithium battery charger with reverse connection protection, used for charging a lithium battery (6), characterized in that: It comprises a housing (1), and a synchronous adjustment component (2), an anti-reverse connection component (3), a battery fixing gallery (4), and a conveyor belt (5) arranged inside the housing (1); The lithium battery (6) is placed on a conveyor belt (5), the conveyor belt (5) is arranged below the battery fixing corridor (4), and the lithium battery (6) moves along the battery fixing corridor (4) via the conveyor belt (5); The synchronous adjustment component (2) comprises a driving motor (21), a synchronous transmission shaft (22), a transmission gear (23) and a rack (24); the anti-reverse connection component (3) comprises a positive and negative electrode adjustment structure symmetrically arranged at both ends of the lithium battery (6), and the positive and negative electrode adjustment structure comprises a fixing frame (31), a fixing sleeve (32), a conductive rod (33), an adjustable negative electrode (34), a fixed positive electrode (35) and a reset member (36); The fixing frame (31) is arranged on the rack (24); the sleeve (32) is vertically fixed on a side of the fixing frame (31) close to the lithium battery (6); the fixed positive electrode (35) is arranged at the bottom end of the fixing sleeve (32); the adjustable negative electrode (34) is rotatably arranged in the fixing sleeve (32) and is located on a side of the fixed positive electrode (35) close to the lithium battery (6); the reset member (36) is arranged between the fixing sleeve (32) and the conductive rod (33); and an insulating layer (37) is arranged on the outer side of the conductive rod (33); The driving motor (21) is connected to a synchronous transmission shaft (22), the synchronous transmission shaft (22) is meshed with a transmission gear (23) and is a worm gear structure, and the transmission gear (23) is meshed with a rack (24) to drive the rack (24) to move; The adjustable negative electrode (34) comprises a fixed section (341), a rotating section (342) and a return spring (343); The fixed section (341) is arranged on the fixed sleeve (32) through, one end of the fixed section (341) is connected to the negative pole of the power supply, and the other end is rotatably connected to the rotating section (342), one end of the reset spring (343) is fixed to the inner wall of the fixed sleeve (32), and the other end is fixed to the rotating section (342), and the reset spring (343) is located on a side of the rotating section (342) away from the lithium battery (6); An elastic conductive contact point (344) is provided on the side of the rotating section (342) close to the lithium battery (6), and an elastic conductive contact point (344) is provided on the side of the fixed positive electrode (35) close to the lithium battery (6).

2. A lithium battery charger with reverse connection protection according to claim 1, characterized in that: The charger further comprises a control unit and a drive motor control circuit; the battery fixing gallery (4) is an L-shaped structure; a limit plate (7) is provided at a horizontal port of the battery fixing gallery (4); a pressure sensor (71) is provided on the inner side of the limit plate (7); the pressure sensor (71) is used to obtain a pressure signal of the lithium battery (6) on the limit plate; the pressure sensor is connected to the control unit; the control unit adjusts the drive motor according to the pressure signal; the drive motor control circuit is electrically connected to the drive motor (21) and is used to control the on and off of the power supply circuit of the drive motor (21).

3. A lithium battery charger with reverse connection protection according to claim 2, characterized in that: A buffer gasket is provided on one side of the limit plate (7) close to the pressure sensor. There are multiple buffer gaskets, each of which is symmetrically arranged on both sides of the pressure sensor. The height of the buffer gasket is slightly higher than that of the pressure sensor.

4. A lithium battery charger with reverse connection protection according to claim 1, characterized in that: An elastic contact piece (38) is provided at one end of the conductive rod (33) close to the lithium battery (6); the elastic contact piece (38) is a strip-shaped structure; one side of the elastic contact piece (38) is fixedly connected to the conductive rod (33) and the other side is in contact with and connected to a plurality of lithium batteries (6).

5. The lithium battery charger with reverse connection protection according to claim 1, characterized in that: Positioning plates (51) are symmetrically arranged on both sides of the conveyor belt (5), the spacing between the two positioning plates (51) matches the length of the lithium battery (6), and the upper end surface of the positioning plate (51) is located below the lower side surface of the positive electrode protrusion of the lithium battery (6).

6. A lithium battery charger with reverse connection protection according to claim 1, characterized in that: The fixing frame (31) is an L-shaped structure. A positioning block (39) is provided on the upper end of the fixing frame (31) close to the lithium battery. The lower end surface of the positioning block (39) is an arc that matches the outer side of the lithium battery (6). The rack (24) is arranged at an angle.

7. A lithium battery charger with reverse connection protection according to claim 1, characterized in that: A lithium battery pressing structure is provided in the battery fixing gallery (4), the lithium battery pressing structure is located above the lithium battery (6), and the lithium battery pressing structure comprises a telescopic motor, a pressing plate and an elastic layer; The telescopic motor is fixed to the upper end of the battery fixing gallery and is driven to connect to the clamping plate, so as to drive the clamping plate to move up and down. The elastic layer is arranged between the clamping plate and the lithium battery (6). A positioning groove is provided on the elastic layer, and the positioning groove matches the shape of the lithium battery (6).

8. An application method of a lithium battery charger with reverse connection protection according to any one of claims 1 to 7, characterized in that: The following steps are involved: S1: placing the lithium batteries to be charged in the battery fixing corridor (4) in sequence, with the positive pole or negative pole of each lithium battery located on the same side; S2: The conveyor belt (5) drives the lithium batteries (6) to move, and each lithium battery (6) is laid flat on the conveyor belt (5) in sequence; S3: The driving motor (21) drives the rack (24) to move, so that the conductive rod (33) of the positive and negative electrode adjustment structure contacts the lithium battery (6), and then moves according to the shape difference between the two ends of the lithium battery, and the other end of the conductive rod (33) is connected to the corresponding electrode to charge the lithium battery; S4: After the lithium batteries are fully charged, the batch of charged lithium batteries are taken out through a conveyor belt (5).

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