Plastic shell battery pack and maintenance and electricity supplement method thereof

Abstract

The invention belongs to the field of battery packs with plastic shells, and particularly relates to a battery pack with a plastic shell. A rear shell main body is arranged behind the front shell main body, and an assembly mechanism convenient to overhaul is arranged between the front shell main body and the rear shell main body; the assembling mechanism convenient to overhaul comprises a charging and discharging socket, and the charging and discharging socket is arranged at the position between the front shell body and the rear shell body. Through the design of the assembly mechanism convenient to overhaul, the function of conveniently overhauling the plastic shell battery pack is achieved, and the problems that after upper and lower shells of an existing plastic shell battery pack are subjected to ultrasonic treatment, IPX4 completion, full sealing or bolt fixing, the battery pack is abnormal in use, a physical contact interface is blocked after sealing, and the battery pack is damaged are solved. And meanwhile, a power supply interface is lacked to be awakened after low electric quantity and over-discharge protection are solved, and the protection on the device is improved.

Description

Technical Field

[0001] The present invention relates to the field of plastic shell battery packs, and specifically to a plastic shell battery pack and its maintenance and power replenishment method. Background Art

[0002] A plastic shell battery pack is a rechargeable or disposable battery module encapsulated with high-toughness engineering plastics, with both safety and lightweight design. Its shell has excellent insulation, impact resistance, and corrosion resistance, and can effectively protect the internal battery cells from mechanical damage, moisture, and short-circuit risks.

[0003] For the existing plastic shell battery pack, specifically, reference can be made to a waterproof structure of a secondary lithium battery pack with the application number: CN202221543419.8, which includes a battery pack. A first side shell is arranged on one side of the battery pack, and a second side shell is arranged on the other side of the battery pack. By selecting appropriate waterproof and dustproof materials, calculating and designing the most reasonable waterproof structure dimensions, and designing the plastic shell and soft glue to be integrally formed, the processing is more convenient, the assembly tolerance is smaller, the waterproof function is better, and the waterproof and dustproof functions and safety of the lithium battery pack are better guaranteed; in order to cope with the increasingly fierce competition, the two-color molding waterproof design of the plastic shell and soft glue is used as a template for the later development of the secondary lithium battery pack to shorten the development cycle; in order to meet customer needs and lead the market trend, the lithium battery pack is miniaturized, lightweight, and has a large capacity, and also through the two-color molding of the plastic shell and soft glue, a better waterproof effect is achieved; After the upper and lower shells of the existing plastic shell battery pack are ultrasonically welded, after achieving IPX4 and being fully enclosed, or fixed by bolts, abnormal situations occur during use. Since the physical contact interfaces are blocked after sealing, the abnormal states cannot be warned. At the same time, there is a lack of a wake-up power supply interface after low battery power and over-discharge protection. Therefore, a plastic shell battery pack and its maintenance and power replenishment method are proposed for the above problems. Summary of the Invention

[0004] In order to make up for the deficiencies of the existing technology, for the problems that after the upper and lower shells of the existing plastic shell battery pack are ultrasonically welded, after achieving IPX4 and being fully enclosed, or fixed by bolts, abnormal situations occur during use. Since the physical contact interfaces are blocked after sealing, the abnormal states cannot be warned. At the same time, there is a lack of a wake-up power supply interface after low battery power and over-discharge protection, the present invention proposes a plastic shell battery pack and its maintenance and power replenishment method.

[0005] The technical solution adopted by the present invention to solve its technical problems is: A plastic shell battery pack described in the present invention includes a front shell main body; a rear shell main body is arranged behind the front shell main body, and a maintenance and assembly facilitating mechanism is arranged between the front shell main body and the rear shell main body; The maintenance and assembly facilitating mechanism includes a charging and discharging socket, which is arranged between the front shell main body and the rear shell main body. A first slot is opened at a position near the upper part of the rear end of the front shell main body, and a second slot is opened at a position near the upper part of the front end of the rear shell main body. The first slot and the second slot also sleeve the outside of the charging and discharging socket, and the first slot and the second slot are also slidably connected to the charging and discharging socket.

[0006] Preferably, a first groove is opened at the top end of the front shell main body. The bottom end of the first groove is fixedly connected to the top end of the bottom film. The top end of the bottom film is adhered to the bottom end of the top film. The bottom film is designed with a thick silicone self-repairing film material, and the top film is designed with a waterproof and breathable film material. Specifically, the top film is a 3M 468MP waterproof and breathable film (IP69K grade).

[0007] Preferably, a second groove is opened at a position near the right side of the first groove at the top end of the front shell main body. The second groove is arc-shaped, and two positioning grooves are opened at the top end of the bottom film.

[0008] Preferably, two detection holes are opened at the top end of the first groove, and the inside of the detection holes is designed with a 30° conical flaring.

[0009] Preferably, the bottom end of the charging and discharging socket is fixedly connected to the top end of the fixed limiting plate. Two pad positions are opened at the top end of the fixed limiting plate. The outside of the fixed limiting plate is also sleeved inside the front shell main body and the rear shell main body, and the fixed limiting plate is also slidably connected to the front shell main body and the rear shell main body.

[0010] Preferably, the outside of the charging and discharging socket near the lower position is fixedly connected to the inner wall of the first fixing block. A first slot is opened at the rear end of the front shell main body. The front end of the first fixing block is inserted into the first slot, and the first fixing block is slidably connected to the first slot.

[0011] Preferably, a second slot is opened at the front end of the rear shell main body. The rear end of the first fixing block is inserted into the second slot, and the first fixing block is slidably connected to the second slot.

[0012] Preferably, the outside of the charging and discharging socket near the upper position of the fixed limiting plate is fixedly connected to the inner wall of the second fixing block. The top end of the second fixing block is fixedly connected to the bottom end of the sealing block. The top end of the sealing block also fits with the top end inside the front shell main body and the rear shell main body.

[0013] Preferably, the rear end of the front shell main body is fixedly connected to the front end of the ultrasonic wire. An ultrasonic groove is opened at the front end of the rear shell main body. The ultrasonic wire is inserted into the ultrasonic groove, and the ultrasonic wire is slidably connected to the ultrasonic groove. Anti-slip grooves are also opened at the left and right ends of the outside of the front shell main body and the rear shell main body. The anti-slip grooves are arc-shaped.

[0014] Preferably, for a method of inspecting and replenishing power for a plastic shell battery pack, when inspecting, press the second groove with the thumb to tear the top film, and guide the probe to insert into the detection hole through the positioning groove to reach the pad position to detect the circuit state; after the probe is pulled out, the bottom film heals itself, and the top film can be re-bonded to restore waterproofness; During assembly, align the charge and discharge socket with the first slot and the second slot, insert the first fixing block into the first slot and the second slot, and embed the ultrasonic wire into the ultrasonic groove to complete the sealing and fixing; When replenishing power, slide to separate the front shell body and the rear shell body, expose the charge and discharge socket, and connect to an external power supply for low-power wake-up or power replenishment. The low-power wake-up specifically means that when the single battery module enters the protection state due to over-discharge, input a small current of 0.1C through the charge and discharge socket to wake up the single battery module and restore the charging ability; The power replenishment specifically means charging in a constant current charging mode, and the value range of the constant current is specifically 0.5C to 1.0C, and specifically includes the following steps: S1: When the first reference voltage is reached in the multiple single battery modules, disconnect the connection with the external power supply and stop the current supply of the external power supply to the single battery module. The first reference battery value is 4.15V; S2: Perform multiple discharge processes on the multiple single battery modules. The discharge current of each discharge process is different, and the multiple discharge currents used in the multiple discharge processes are gradually decreasing current values; S3: When the multiple single battery modules reach the second reference voltage, stop continuing to discharge, and thus complete the power replenishment. The second reference voltage value is 3.85V.

[0015] The beneficial effects of the present invention are as follows: 1. Through the structural design of the convenient inspection and assembly mechanism, the present invention realizes the function of facilitating the inspection of the plastic shell battery pack, solves the problems that after ultrasonic welding of the upper and lower shells of the existing plastic shell battery pack, after achieving IPX4 and full enclosure, or after fixing with bolts, abnormal conditions occur in the battery pack during use. Since the physical contact interface is blocked after sealing, abnormal states cannot be warned, and there is a lack of a wake-up power supply interface after low power and over-discharge protection, improving the protection of the device; 2. Through the structural design of the convenient inspection and assembly mechanism, the present invention realizes the function of non-destructive inspection, can break through the physical limitation of irreversible enclosure after ultrasonic welding, realizes non-destructive contact detection, improves the inspection efficiency on the premise of maintaining the original protection level, is beneficial to extending the overall service life of the battery pack, and can effectively maintain the structural strength of the battery pack throughout the life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 Schematic diagram of the three-dimensional structure of the present invention; Figure 2 Schematic diagram of the three-dimensional structure of the first partial front view sectional view of the present invention; Figure 3 Schematic diagram of the three-dimensional structure of the second partial front view sectional view of the present invention; Figure 4 Schematic diagram of the maintenance component structure of the present invention; Figure 5 For the present invention Figure 1 Enlarged structure diagram at position A in; Figure 6 For the present invention Figure 2 Enlarged structure diagram at position B in; Figure 7 For the present invention Figure 3 Enlarged structure diagram at position C in; Figure 8 For the present invention Figure 4 Enlarged structure diagram at position D in; Figure 9 For the present invention Figure 4 Enlarged structure diagram at position E in.

[0018] In the figure: 1. Front shell main body; 2. Rear shell main body; 10. Charge and discharge socket; 11. First slot; 12. Second slot; 13. First fixing block; 14. First slot; 15. Second slot; 16. Fixed limiting plate; 17. Second fixing block; 18. Sealing block; 19. Ultrasonic groove; 20. Ultrasonic wire; 21. First groove; 22. Bottom film; 23. Top film; 24. Second groove; 25. Detection hole; 26. Pad position; 27. Positioning groove; 28. Anti-slip groove. Detailed implementation manners

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0020] Please refer to Figures 1 - 9As shown, a plastic shell battery pack includes a front shell body 1; a rear shell body 2 is arranged behind the front shell body 1, and an assembly mechanism convenient for maintenance is arranged between the front shell body 1 and the rear shell body 2; The assembly mechanism for easy maintenance includes a charging and discharging socket 10, which is arranged between the front shell body 1 and the rear shell body 2. A first slot 11 is opened at the upper position near the rear end of the front shell body 1, and a second slot 12 is opened at the upper position near the front end of the rear shell body 2. The first slot 11 and the second slot 12 are also sleeved on the outside of the charging and discharging socket 10, and the first slot 11 and the second slot 12 are also slidably connected to the charging and discharging socket 10. The charging and discharging socket 10 is square in design.

[0021] During operation, the outer side of the charging and discharging socket 10 near the top is inserted into the first slot 11 opened at the rear end of the front shell body 1, and then the second slot 12 opened at the front end of the rear shell body 2 is aligned with the position of the front shell body 1 and inserted until the second slot 12 opened at the front end of the second slot 12 completely wraps the outer side of the charging and discharging socket 10.

[0022] Furthermore, a first groove 21 is formed at the top of the front shell body 1, and the top of the first groove 21 is fixedly connected to the bottom of the bottom film 22, and the top of the bottom film 22 is adhered to the bottom of the top film 23, the bottom film 22 is designed as a thick silicone self-repairing film material, and the top film 23 is designed as a waterproof and breathable film material; During operation, the top film 23 is pinched and torn outwards until the top film 23 is torn apart along the surface of the bottom film 22. Due to the design of the material of the bottom film 22, the second groove will automatically heal within 24 hours after puncture. At the same time, due to the design of the material of the top film 23, it has good air permeability.

[0023] Furthermore, a second groove 24 is provided at the top of the front shell body 1 near the right side of the first groove 21. The second groove 24 is arc-shaped. Two groups of positioning grooves 27 are provided at the top of the bottom film 22. The size of the second groove 24 is similar to that of an adult's thumb. During operation, the thumb moves toward the side end of the top film 23 along the second groove 24 until it contacts the side end of the top film 23 inside the first groove 21 , and the positioning groove 27 provided on the bottom film 22 is used for positioning, so as to facilitate the insertion of the probe.

[0024] Furthermore, two groups of detection holes 25 are provided at the top of the first groove 21, and the interior of the detection holes 25 adopts a 30° conical expansion design; During operation, the probe is inserted into the positioning groove 27 according to the positioning groove 27 provided on the bottom film 22 as a position guide until it passes through the bottom film 22 and reaches the inside of the detection hole 25. The inside of the detection hole 25 adopts a 30° conical expansion design so that it can be suitable for contact with probes of different diameters.

[0025] Further, the bottom end of the charging and discharging socket 10 is fixedly connected to the top end of the fixed limiting plate 16. Two pad positions 26 are provided at the top end of the fixed limiting plate 16. The outside of the fixed limiting plate 16 is also sleeved inside the front shell body 1 and the rear shell body 2, and the fixed limiting plate 16 is also slidably connected to the front shell body 1 and the rear shell body 2; During operation, the probe continues to penetrate inward until it reaches the position of the pad position 26 provided on the fixed limiting plate 16 for detection. When the front shell body 1 and the rear shell body 2 completely wrap the outside of the charging and discharging socket 10, the inner walls of the front shell body 1 and the rear shell body 2 will wrap the outside of the fixed limiting plate 16.

[0026] Further, the charging and discharging socket 10 is fixedly connected to the inner wall of the first fixing block 13 at a position near the lower part of the outside. A first slot 14 is provided at the rear end of the front shell body 1. The front end of the first fixing block 13 is inserted into the first slot 14, and the first fixing block 13 is slidably connected to the first slot 14. The first fixing block 13 is circular in design; During operation, when the charging and discharging socket 10 is inserted into the front shell body 1, it will drive the front end of the first fixing block 13 to be inserted along the inner wall of the first slot 14 until it is inserted into the first slot 14.

[0027] Further, a second slot 15 is provided at the front end of the rear shell body 2. The rear end of the first fixing block 13 is inserted into the second slot 15, and the first fixing block 13 is slidably connected to the second slot 15. The second slot 15 is semi-circular in design; During operation, when the rear shell body 2 is inserted, it drives the second slot 15 to be inserted along the outside of the rear end of the first fixing block 13 until it completely sleeves the outside of the first fixing block 13.

[0028] Further, the charging and discharging socket 10 is fixedly connected to the inner wall of the second fixing block 17 at a position near the upper part of the fixed limiting plate 16. The top end of the second fixing block 17 is fixedly connected to the bottom end of the sealing block 18. The top end of the sealing block 18 is also in contact with the top end inside the front shell body 1 and the rear shell body 2. The sealing block 18 is made of rubber material; During operation, when the front shell body 1 and the rear shell body 2 wrap the outside of the charging and discharging socket 10, the sealing block 18 at the top end of the second fixing block 17 will simultaneously abut against the top end inside the front shell body 1 and the rear shell body 2, thereby increasing the sealing performance.

[0029] Further, the rear end of the front shell body 1 is fixedly connected to the front end of the ultrasonic wire 20. A ultrasonic groove 19 is provided at the front end of the rear shell body 2. The ultrasonic wire 20 is inserted into the ultrasonic groove 19, and the ultrasonic wire 20 is slidably connected to the ultrasonic groove 19; During operation, when the rear shell body 2 is inserted into the front shell body 1, it drives the ultrasonic wire 20 to be inserted along the inside of the ultrasonic groove 19 until the ultrasonic wire 20 is completely inserted into the ultrasonic groove 19.

[0030] Furthermore, anti-slip grooves 28 are also provided at the left and right ends of the outer sides of the front shell body 1 and the rear shell body 2, and the anti-slip grooves 28 are designed in an arc shape; During operation, the anti-slip grooves 28 provided on the outer sides of the front shell body 1 and the rear shell body 2 can effectively achieve an anti-slip effect.

[0031] Furthermore, a method for repairing and replenishing power of a plastic shell battery pack is provided. During repair, the thumb presses the second groove 24 to tear the top film 23, and the probe is guided through the positioning groove 27 to insert into the detection hole 25 to reach the pad position 26 to detect the circuit state; after the probe is pulled out, the bottom film 22 heals itself, and the top film 23 can be re-bonded to restore waterproofness; During assembly, the charging and discharging socket 10 is aligned with the first slot 11 and the second slot 12, the first fixing block 13 is inserted into the first slot 14 and the second slot 15, and the ultrasonic wire 20 is embedded in the ultrasonic groove 19 to complete the sealing and fixing; During power replenishment, the front shell body 1 and the rear shell body 2 are slid apart to expose the charging and discharging socket 10, and an external power source is connected to perform low-power wake-up or power replenishment. The low-power wake-up specifically means that when the single battery module enters the protection state due to over-discharge, a small current of 0.1C is input through the charging and discharging socket to wake up the single battery module and restore the charging ability; The power replenishment specifically means charging in a constant current charging mode, and the value range of the constant current is specifically from 0.5C to 1.0C, and specifically includes the following steps: S1: When the first reference voltage is reached in the multiple single battery modules, the connection with the external power source is disconnected, and the external power source stops supplying current to the single battery module. The first reference battery value is 4.15V; S2: The multiple single battery modules are subjected to multiple discharge processes, and the discharge current of each discharge process is different. The multiple discharge currents used in the multiple discharge processes are current values that decrease step by step; S3: When the multiple single battery modules reach the second reference voltage, the continued discharge is stopped, and thus the power replenishment is completed. The second reference voltage value is 3.85V.

[0032] Working principle: When detection is required, the thumb is moved along the second groove 24 toward the side end of the top film 23 until it touches the side end of the top film 23 inside the first groove 21, and then the top film 23 is pinched and torn outward until the top film 23 is torn and detached along the surface of the bottom film 22. Then, the probe is inserted along the inside of the positioning groove 27 according to the positioning groove 27 opened in the bottom film 22 as a position guide, until it passes through the bottom film 22 and reaches the inside of the detection hole 25. The inside of the detection hole 25 adopts a 30° conical expansion design so that it can be used for probes of different diameters to contact, and continue to go deeper inward until it reaches the pad position 26 opened by the fixed limit plate 16 for detection. When the probe is pulled out of the bottom film 22, the bottom film 22 will automatically heal within 24 hours after puncture due to its own material design.

[0033] During assembly, first insert the outer side of the charge and discharge socket 10 near the top into the first slot 11 opened at the rear end of the front shell body 1, and then align the second slot 12 opened at the front end of the rear shell body 2 with the position of the front shell body 1 for insertion, until the second slot 12 opened at the front end of the second slot 12 completely wraps the outer side of the charge and discharge socket 10, and when the front shell body 1 and the rear shell body 2 completely wrap the outer side of the charge and discharge socket 10, the inner walls of the front shell body 1 and the rear shell body 2 will wrap the outer side of the fixed limiting plate 16, and at the same time, when the charge and discharge socket 10 is inserted into the front shell body 1, the front end of the first fixed block 13 will be driven to be inserted along the inner wall of the first slot 14 until it is inserted into the first Inside the slot 14, when the rear shell body 2 is inserted, the second slot 15 is driven to be inserted along the outer side of the rear end of the first fixed block 13 until it is completely covered on the outside of the first fixed block 13, and at the same time, when the front shell body 1 and the rear shell body 2 are wrapped around the outside of the charging and discharging socket 10, the sealing block 18 at the top of the second fixed block 17 will simultaneously press against the top of the front shell body 1 and the rear shell body 2, thereby increasing the sealing performance. At the same time, when the rear shell body 2 is inserted into the front shell body 1, the ultrasonic line 20 is driven to be inserted along the inside of the ultrasonic groove 19 until the ultrasonic line 20 is completely inserted into the inside of the ultrasonic groove 19, and the anti-skid grooves 28 opened on the outside of the front shell body 1 and the rear shell body 2 can effectively activate the anti-skid effect.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A plastic housing battery pack, comprising a front shell body (1); characterized in that: A rear housing body (2) is arranged behind the front housing body (1), and a maintenance and assembly facilitating mechanism is arranged between the front housing body (1) and the rear housing body (2). The maintenance and assembly facilitating mechanism includes a charging and discharging socket (10). The charging and discharging socket (10) is arranged between the front housing body (1) and the rear housing body (2). A first slot (11) is opened at a position near the upper part of the rear end of the front housing body (1), and a second slot (12) is opened at a position near the upper part of the front end of the rear housing body (2). Both the first slot (11) and the second slot (12) are slidably connected to the charging and discharging socket (10).

2. The plastic housing battery pack according to claim 1, wherein: A first groove (21) is opened at the top of the front housing body (1). A bottom film (22) is fixedly connected to the top of the first groove (21), and a top film (23) is fixedly connected to the top of the bottom film (22). The bottom film (22) is made of a thick silicone self-healing film material, and the top film (23) is made of a waterproof and breathable film material.

3. A plastic housing battery pack according to claim 2, characterized in that: A second groove (24) is opened at a position near the right side of the first groove (21) at the top of the front housing body (1). The second groove (24) is designed in an arc shape, and two positioning grooves (27) are opened at the top of the bottom film (22).

4. A plastic shell battery pack according to claim 3, wherein: Two detection holes (25) are opened at the top of the first groove (21). The inside of the detection holes (25) is designed with a 30° tapered flared opening.

5. A plastic housing battery pack according to claim 4, characterized in that: A fixed limiting plate (16) is fixedly connected to the bottom end of the charging and discharging socket (10). A soldering pad position (26) is opened at the top of the fixed limiting plate (16). The outside of the fixed limiting plate (16) is slidably connected to the front housing body (1) and the rear housing body (2).

6. The plastic housing battery pack according to claim 5, wherein: A first fixing block (13) is fixedly connected to the outside of the charging and discharging socket (10) near the lower part. A first slot (14) is opened at the rear end of the front housing body (1). The front end of the first fixing block (13) is inserted into the first slot (14), and the first fixing block (13) is slidably connected to the first slot (14).

7. A plastic housing battery pack according to claim 6, characterized in that: A second slot (15) is opened at the front end of the rear housing body (2). The rear end of the first fixing block (13) is inserted into the second slot (15), and the first fixing block (13) is slidably connected to the second slot (15).

8. A plastic shell battery pack according to claim 7, characterized in that: A second fixing block (17) is fixedly connected to the outside of the charging and discharging socket (10) near the upper part of the fixed limiting plate (16). A sealing block (18) is fixedly connected to the top of the second fixing block (17). The top of the sealing block (18) is attached to the inner top of the front housing body (1) and the rear housing body (2).

9. The plastic housing battery pack according to claim 8, wherein: An ultrasonic wire (20) is fixedly connected to the rear end of the front housing body (1). An ultrasonic groove (19) is opened at the front end of the rear housing body (2). The ultrasonic wire (20) is inserted into the ultrasonic groove (19), and the ultrasonic wire (20) is slidably connected to the ultrasonic groove (19). Anti-slip grooves (28) are opened at both the left and right ends of the outside of the front housing body (1) and the rear housing body (2). The anti-slip grooves (28) are designed in an arc shape.

10. A method for overhauling and replenishing power of a plastic shell battery pack, which is applicable to a plastic shell battery pack described in any one of claims 1-9, and is characterized in that: During maintenance, press the thumb on the second groove (24) to tear off the top film (23). Insert the probe into the detection hole (25) through the positioning groove (27) until it reaches the pad position (26) to detect the circuit state. After the probe is removed, the bottom film (22) heals itself, and the top film (23) can be re-bonded to restore waterproofing; During assembly, align the charge and discharge socket (10) with the first slot (11) and the second slot (12), insert the first fixing block (13) into the first socket (14) and the second socket (15), and embed the ultrasonic wire (20) into the ultrasonic groove (19) to complete the sealing and fixing; During power replenishment, slide the front shell body (1) and the rear shell body (2) apart to expose the charge and discharge socket (10), and connect to an external power source for low-power wake-up or power replenishment. The low-power wake-up specifically means that when the single-cell battery module enters the protection state due to over-discharge, a small current of 0.1C is input through the charge and discharge socket to wake up the single-cell battery module and restore the charging ability; The power replenishment specifically means charging in a constant-current charging mode. The value range of the constant current is specifically from 0.5C to 1.0C, and specifically includes the following steps: S1: When the voltage of multiple single-cell battery modules reaches the first reference voltage, disconnect the connection with the external power source and stop the current supply of the external power source to the single-cell battery modules. The first reference battery value is 4.15V; S2: Perform multiple discharge processes on multiple single-cell battery modules. The discharge current of each discharge process is different, and the multiple discharge currents used in the multiple discharge processes are gradually decreasing current values; S3: When the voltage of multiple single-cell battery modules reaches the second reference voltage, stop further discharging, and thus complete the power replenishment. The second reference voltage value is 3.85V.

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