Battery charging system with safety detection function

Abstract

The invention provides a battery charging system with a safety detection function. The battery charging system comprises a charging bin, a charging system, a safety detection system and a control system, wherein the charging bin is used for accommodating a battery to be charged; the charging system comprises a sampling circuit; a direct current charging power supply; a first switch group; the safety detection system comprises: a large current generator; a variable load; a second switch group; the control system is used for controlling the first switch group and the second switch group to switch the connection relation between the battery and the charging system and the connection relation between the battery and the safety detection system, and determining the charging result and the safety detection result of the battery according to the electric power parameters. According to the invention, the control system is matched with the switch group to realize the switching between the charging process and the safety detection process of the battery, and the large current generator and the variable load are utilized to complete the detection of whether the battery has over-charging and over-discharging protection in the safety detection process, so that the rapid safety detection of the battery in the charging process is realized; a user is helped to effectively check the safety of the battery, and the use safety is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of storage batteries, and in particular to a battery charging system with a safety detection function. Background Art

[0002] With the popularity of electric bicycles and electric tricycles, batteries, especially lithium batteries, are widely used, and the insecurity caused by batteries has received great attention from users. Most of the accidents such as explosions and combustion during battery charging are caused by overcharging of the battery. Overcharging of the battery will increase the internal pressure of the battery, damage the structure, and generate a large amount of gas inside the battery, resulting in increased internal pressure of the battery, causing battery deformation, leakage, and even explosion; over-discharging of the battery will also cause the same harm to the battery. Whether the battery pack used in electric vehicles has overcharge and over-discharge protection functions, whether the battery pack's BMS (Battery Management System) has overcharge and over-discharge protection functions, and the effectiveness of the protection function are becoming increasingly important in battery use. Batteries without protection functions or with failed protection functions are extremely unsafe. Therefore, there is an urgent need for a charging system that can help users understand whether the battery they are using has a protection function to meet users' needs for battery safety. Summary of the invention

[0003] The purpose of the embodiments of the present disclosure is to provide a battery charging system with a safety detection function to solve the above-mentioned problems existing in the prior art.

[0004] The embodiment of the present disclosure adopts the following technical scheme: a battery charging system with a safety detection function, comprising at least a charging compartment, a charging system, a safety detection system and a control system: wherein the charging compartment is used to accommodate a battery to be charged; the charging system comprises at least: a sampling circuit for real-time acquisition of power parameters of the battery; a DC charging power supply for charging the battery in the charging compartment; and a first switch group for switching the connection relationship between the charging compartment and the DC charging power supply and the safety detection system respectively; the safety detection system comprises at least: a large current generator for detecting the overcharge protection function of the battery; a variable load for detecting the over-discharge protection function of the battery; and a second switch group for switching the connection relationship between the battery and the large current generator and the variable load respectively; the control system is used to control the first switch group and the second switch group to switch the connection relationship between the battery and the charging system and the safety detection system respectively, and determine the charging result and safety detection result of the battery according to the power parameters collected by the sampling circuit.

[0005] In some embodiments, the first switch group includes at least a first switch and a second switch, the second switch group includes at least a third switch and a fourth switch, and the first switch, the second switch, the third switch and the fourth switch are all single-pole double-throw switches; wherein the fixed end of the first switch is connected to the positive electrode of the battery, and the moving end of the first switch is connected to the first end of the DC charging power supply or the fixed end of the third switch; the fixed end of the second switch is connected to the negative electrode of the battery, and the moving end of the second switch is connected to the second end of the DC charging power supply or the fixed end of the fourth switch; the moving end of the third switch is connected to the first end of the large current generator or the first end of the variable load; the moving end of the fourth switch is connected to the second end of the large current generator or the second end of the variable load.

[0006] In some embodiments, the control system is specifically used to control the active end of the first switch to be connected to the first end of the DC charging power supply, and control the active end of the second switch to be connected to the second end of the DC charging power supply when the battery is placed in the charging compartment, so as to perform a charging operation on the battery.

[0007] In some embodiments, the power parameters include at least the charging voltage and charging current of the battery, and the control system is further used to: when the charging voltage reaches the rated voltage of the battery, control the moving end of the first switch to be connected to the fixed end of the third switch, and control the moving end of the second switch to be connected to the fixed end of the fourth switch, so as to perform safety detection operations on the battery.

[0008] In some embodiments, when detecting the overcharge protection function of the battery, the control system is specifically used to: control the moving end of the third switch to be connected to the first end of the high current generator, and control the moving end of the fourth switch to be connected to the second end of the high current generator; adjust the output current of the high current generator to overcharge the battery, so that the output current is a first preset multiple of the battery capacity of the battery, and detect the charging voltage and the charging current in real time; when the charging voltage is greater than or equal to the rated voltage, if the charging current becomes 0 within a first preset time period, it is determined that the battery has an overcharge protection function, otherwise, it is determined that the battery does not have an overcharge protection function.

[0009] In some embodiments, when detecting the over-discharge protection function of the battery, the control system is specifically used to: control the moving end of the third switch to be connected to the first end of the variable load, and control the moving end of the fourth switch to be connected to the second end of the variable load; adjust the resistance value of the variable load to over-discharge the battery, so that the battery is discharged at a current of a second preset multiple of the battery capacity, and detect the charging voltage in real time; when the charging voltage becomes 0 within a second preset time period, it is determined that the battery has the over-discharge protection function, otherwise, it is determined that the battery does not have the over-discharge protection function.

[0010] In some embodiments, when the charging voltage does not become 0 within the second preset time period, the control system controls the active end of the third switch and / or the fourth switch to disconnect from the variable load.

[0011] In some embodiments, the control system is further used to: after the safety detection operation on the battery is completed, control the moving end of the first switch to be connected to the first end of the DC charging power supply, and control the moving end of the second switch to be connected to the second end of the DC charging power supply.

[0012] In some embodiments, the control system is also used to: after the battery is placed in the charging compartment, receive the battery type, the rated voltage of the battery and the battery capacity of the battery input by the user in the operation interface; wherein the operation interface is communicatively connected with the control system.

[0013] In some embodiments, the control system is further used to: display the charging result and the safety detection result on the operation interface.

[0014] The beneficial effects of the disclosed embodiments are as follows: the charging process and the safety detection process of the battery are switched by cooperating with the switch group through the control system, and a large current generator and a variable load are used to complete the detection of whether the battery has overcharge and over-discharge protection during the safety detection process, thereby realizing rapid safety detection of the battery during the charging process, helping users to effectively check the safety of the battery and improve safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate one or more embodiments of this specification or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0016] Figure 1It is a schematic diagram of the structure of a battery charging system with a safety detection function according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0017] In order to enable those skilled in the art to better understand the technical solutions in one or more embodiments of this specification, the following will be combined with the drawings in one or more embodiments of this specification to clearly and completely describe the technical solutions in one or more embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on one or more embodiments of this specification, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of this document.

[0018] With the popularity of electric bicycles and electric tricycles, batteries, especially lithium batteries, are widely used, and the insecurity caused by batteries has received great attention from users. Most of the accidents such as explosions and combustion during battery charging are caused by overcharging of the battery. Overcharging of the battery will increase the internal pressure of the battery, damage the structure, and generate a large amount of gas inside the battery, resulting in increased internal pressure of the battery, causing battery deformation, leakage, and even explosion; over-discharging of the battery will also cause the same harm to the battery. Whether the battery pack used in electric vehicles has overcharge and over-discharge protection functions, whether the battery pack's BMS (Battery Management System) has overcharge and over-discharge protection functions, and the effectiveness of the protection function are becoming increasingly important in battery use. Batteries without protection functions or with failed protection functions are extremely unsafe. Therefore, there is an urgent need for a charging system that can help users understand whether the battery they are using has a protection function to meet users' needs for battery safety.

[0019] In order to solve the above problems, the present disclosure provides a battery charging system with a safety detection function, which can realize a rapid safety detection after the battery is fully charged. Figure 1 As shown, it mainly includes a charging compartment 10, a charging system 20, a safety detection system 30 and a control system 40. The control system 40 completes the coordinated control of the charging compartment 10, the charging system 20 and the safety detection system 30 to realize the charging operation and safety detection operation of the battery.

[0020] Specifically, the charging compartment 10 is mainly used to accommodate the battery 100 to be charged, and its shape and size can be set according to the commonly used battery size, or directly implemented by adopting the conventional charging compartment design. It should be noted that the charging compartment 10 should at least include electrodes corresponding to the positive and negative poles of the battery 100, and lead out the positive and negative electrodes for charging or detection as the positive and negative poles of the battery 100 connected to the outside world. In addition, the charging compartment 10 should also have fireproof and explosion-proof functions, and temperature sensors and simple fire-fighting devices can be further arranged inside it.

[0021] The charging system 20 mainly includes a sampling circuit 21 for real-time acquisition of battery power parameters, a DC charging power supply 22 for charging the battery 100 in the charging compartment 10, and a first switch group Q1 for switching the connection relationship between the charging compartment 10 and the DC charging power supply 22 and the safety detection system 30. Figure 1 As shown in the connection relationship, the sampling circuit 21 and the charging compartment 10 are always connected, which is equivalent to the sampling end of the sampling circuit 21 being continuously connected to the positive and negative poles of the charging compartment 10 (that is, the positive and negative poles presented by the battery 100 to the outside) to ensure real-time power parameter collection; and the DC charging power supply 22 and the charging compartment 10 are connected or not through the first switch group Q1 to control whether they are connected.

[0022] In this embodiment, the power parameters collected by the sampling circuit 21 are mainly the charging voltage and charging current of the battery. The specific circuit structure of the sampling circuit 21 can directly adopt a conventional sampling circuit design, and this embodiment does not limit its specific circuit structure implementation. The DC charging power supply 22 needs to meet the rated charging voltage of the battery 100, and its specific output voltage is usually 12V, or a DC charging power supply with adjustable output voltage can be selected according to actual needs, and the output voltage of the DC charging power supply can be adjusted in real time through the control system. The first switch group Q1 is mainly used to control the object actually connected to the charging compartment 10. If it is connected to a DC charging power supply, it means that it is currently in the process of charging operation. If it is connected to the safety detection system 30, it means that it is currently in the safety detection process.

[0023] The safety detection system 30 in this embodiment mainly includes a large current generator 31 for detecting the overcharge protection function of the battery, a variable load 32 for detecting the over-discharge protection function of the battery; and a second switch group Q2 for switching the connection relationship between the battery 100 and the large current generator 31 and the variable load 32, that is, in the process of safety detection of the battery, whether to perform an overcharge protection function test or an over-discharge protection function test depends on the specific connection object of the second switch group Q2. Finally, the control system 40 is used to control the switching status of the first switch group Q1 and the second switch group Q2 to switch the connection relationship between the battery and the charging system and the safety detection system, respectively. At the same time, the control system 40 will use the power parameters collected by the sampling circuit 21 as the basis for switching the switch group, and determine the charging result and safety detection result of the battery according to the power parameters under different operation links of the battery.

[0024] In some embodiments, the first switch group Q1 includes at least a first switch K1 and a second switch K2, and the second switch group Q2 includes at least a third switch K3 and a fourth switch K4. The first switch K1 to the fourth switch K4 are all single-pole double-throw switches, that is, the control system 40 realizes the connection between the battery and different objects by adjusting the moving end of the single-pole double-throw switch. In combination with the specific implementation functions of the above switches, the fixed end of the first switch K1 is connected to the positive electrode of the battery 100, and the moving end of the first switch K1 is connected to the first end of the DC charging power supply 22 or the fixed end of the third switch K3; the fixed end of the second switch K2 is connected to the negative electrode of the battery 100, and the moving end of the second switch K2 is connected to the second end of the DC charging power supply 22 or the fixed end of the fourth switch K4; the moving end of the third switch K3 is connected to the first end of the large current generator 31 or the first end of the variable load 32; the moving end of the fourth switch K4 is connected to the second end of the large current generator 31 or the second end of the variable load 32. It should be noted that the single-pole double-throw switch limited to use in the switch of this embodiment can be a mechanical switch, and can also be implemented by an electromagnetic switch such as an electromagnetic valve, a relay, etc., as long as the same function can be achieved; in addition, the two switches in the first switch group Q1 are synchronously controlled during actual regulation, that is, when the moving end connection of the first switch K1 is adjusted, the moving end of the second switch K2 will also be adjusted synchronously. Similarly, when the moving end of the third switch K3 is adjusted, the moving end of the fourth switch K4 will also change synchronously.

[0025] When the battery charging system of this embodiment is actually used, the battery should be charged first, and after the charging operation is completed (that is, the battery is in a fully charged state), a safety detection operation should be performed to ensure that the collection results of the power parameters during the safety detection process are accurate. Specifically, when the control system 40 determines that a new battery is placed in the charging compartment 10, the control system 40 controls the moving end of the first switch K1 to be connected to the first end of the DC charging power supply 22, and controls the moving end of the second switch K2 to be connected to the second end of the DC charging power supply 22 to perform the charging operation on the battery 100. At the same time, during the charging process, the control system 40 continuously obtains the charging voltage and charging current of the battery 100 through the sampling circuit 21 to determine the current charging state of the battery. When the charging voltage reaches the rated voltage of the battery, it means that the battery is fully charged and the subsequent safety detection steps can be performed.

[0026] In some embodiments, the battery charging system may have an operation interface. After the user places the battery into the charging compartment, the user can input the battery type, rated voltage, battery capacity and other parameters of the battery on the operation interface. The operation interface is communicated with the control system 40, and can be specifically presented through the display screen, and combined with an input device (such as a keyboard, mouse, or a touch panel on the display screen, etc.) to complete the input of the corresponding battery parameters. The control system 40 obtains the above-mentioned battery parameters as the basis for regulating the various operating processes of the battery.

[0027] When the control system 40 determines that the charging voltage reaches the rated voltage of the battery, the moving end of the first switch K1 is controlled to be connected to the fixed end of the third switch K3, and the moving end of the second switch K2 is controlled to be connected to the fixed end of the fourth switch K4, so as to perform a safety detection operation on the battery. In fact, the safety function of the battery detected in this embodiment mainly refers to detecting whether the battery is equipped with a BMS board with overcharge and over-discharge protection functions, and judging whether the function of the BMS board is normal, rather than detecting the overcharge or over-discharge protection of the battery body.

[0028] The safety detection operation of this embodiment mainly includes the detection of overcharge protection function and over-discharge protection function, that is, respectively detecting the protection function of the BMS board to the battery in the case of high current charging and high current discharging. Specifically, in the case of detecting the overcharge protection function, the control system 40 first controls the moving end of the third switch K3 to be connected to the first end of the high current generator 31, and controls the moving end of the fourth switch K4 to be connected to the second end of the high current generator 31, so that the positive and negative ends of the battery are connected to the two output ends of the high current generator 31; then, the control system 40 can adjust the output current of the high current generator 31 to perform an overcharge operation on the battery 100, and the output current of the high current generator 31 can be set to a first preset multiple of the battery capacity C of the battery 100, for example, using a high current of 1C to 2C to charge the battery 100, and The charging voltage and charging current of the battery fed back by the sampling circuit 21 are detected in real time to determine the effectiveness of the battery overcharge protection function. Since the safety detection operation is performed after the charging operation is completed, the charging voltage collected by the sampling circuit must be greater than or equal to the rated voltage of the battery during the overcharge process. On this basis, if the charging current is detected to be 0 within the first preset time, it means that the battery has an overcharge protection function, that is, the battery has a BMS board and the BMS board functions normally. If the charging current is not detected to be 0 within the first preset time, it means that the battery does not have overcharge protection and there may be safety hazards.

[0029] In some embodiments, the first preset time length can be set to any time length between 30 seconds and 150 seconds. If the first preset time length is too long, the excessive charging current may easily damage the battery, but too short a time length may cause inaccurate detection results. Therefore, this embodiment may use, for example, 120 seconds as the first preset time length to simultaneously meet the accuracy of the detection results and the safety of the battery detection process.

[0030] Specifically, in the case of detecting the over-discharge protection function, the control system 40 controls the moving end of the third switch K3 to be connected to the first end of the variable load 32, and controls the moving end of the fourth switch K4 to be connected to the second end of the variable load 32; at the same time, the resistance value of the variable load 32 is adjusted to over-discharge the battery 100, so that the battery 100 is discharged according to the current of the second preset multiple of the battery capacity C, for example, it is discharged to the outside according to the current of 2C to 4C, which is 2 to 4 times the battery capacity, and the change of the charging voltage is detected to judge the effectiveness of the battery over-discharge protection function; within the second preset time, if the control system 40 detects that the charging voltage becomes 0, it is determined that the battery has the over-discharge protection function, otherwise it means that the battery does not have the over-discharge protection function, and there may be safety hazards. It should be noted that the variable load 32 is mainly a resistor with a variable resistance, and the control system controls the discharge current of the battery 100 by adjusting the resistance value presented by the variable load 32.

[0031] In some embodiments, the second preset time length is any time length between 1 and 5 seconds. For example, 5 seconds is used, that is, the control system starts timing when the second switch group Q2 is switched to connect to the variable load. When the charging voltage is detected to be 0 within 5 seconds, the battery is deemed to be over-discharge protected, otherwise the battery is not protected. It should be noted that during the over-discharge protection detection process, if the charging voltage does not become 0 within the second preset time length, the control system 40 actively controls the moving end of the third switch K3 and / or the fourth switch K4 to disconnect from the variable load 32, so that the battery is in an open circuit state to prevent excessive discharge current from causing battery failure.

[0032] In fact, there is no specific execution order for the overcharge protection function detection and over-discharge protection function detection of the battery during actual execution. The control system can independently control whether to connect the variable load or the large current generator first. This embodiment does not limit the specific connection order.

[0033] In some embodiments, the control system 40 is also used to control the moving end of the first switch K1 to be connected to the first end of the DC charging power supply 22 and the moving end of the second switch K2 to be connected to the second end of the DC charging power supply 22 after the safety detection operation of the battery 100 is completed, so that the battery returns to the charging state, firstly to replenish part of the power loss that may be caused during the safety detection process, and secondly to avoid the battery from being in a continuous overcharge or over-discharge state, which affects the battery safety. Furthermore, the control system 40 can also display the test results of the safety detection of the battery on the operation interface to intuitively inform the user of the current battery safety performance and charging results, especially when there are safety hazards in the battery, the user can be informed in time to prevent danger in the subsequent use process.

[0034] It should be understood that the specific form of the battery charging system disclosed in this embodiment can be a household battery charging device, which uses an independent charging compartment to cooperate with a control system (and display device) set in the compartment body to complete the charging operation and safety detection operation of the household electric vehicle battery. In fact, the battery charging system can also be a shared charging cabinet, which is formed by setting up an array of charging compartments to form the main body of the charging cabinet. Each charging compartment is configured with an independent charging system and a safety detection system to meet the parallel implementation of the processes in different charging compartments. The control system can control all charging compartments separately and record the safety detection results. When the user uses the shared charging cabinet to charge the battery, the control system can record the corresponding connection method, and after the charging process and the safety detection process are completed, send information to the user to prompt him to take the battery. At the same time, the information can further carry the test results of the safety test, so that the user can understand the safety performance of its battery.

[0035] This embodiment realizes the switching of the battery charging process and the safety detection process by cooperating with the switch group through the control system, and uses the large current generator and the variable load to complete the detection of whether the battery has overcharge and over-discharge protection during the safety detection process, so as to realize the rapid safety detection of the battery during the charging process, help users to effectively check the safety of the battery and improve the safety of use. At the same time, the overcharge and over-discharge detection process using large current can directly and quickly change the state of the battery, effectively improve the detection speed of the battery, and reduce the adverse effects on the battery or circuit during the test.

[0036] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A battery charging system with a safety detection function, characterized in that: At least includes a charging compartment, a charging system, a safety detection system and a control system: The charging compartment is used to accommodate the battery to be charged; The charging system at least comprises: A sampling circuit for collecting power parameters of the battery in real time; A DC charging power supply for charging the battery in the charging compartment; and a first switch group for switching the connection relationship between the charging compartment and the DC charging power supply and the safety detection system respectively; The safety detection system at least comprises: A high current generator for detecting an overcharge protection function of the battery; A variable load for detecting an over-discharge protection function of the battery; and a second switch group for switching the connection relationship between the battery and the large current generator and the variable load respectively; The control system is used to control the first switch group and the second switch group to switch the connection relationship between the battery and the charging system and the safety detection system respectively, and determine the charging result and safety detection result of the battery according to the power parameters collected by the sampling circuit.

2. The battery charging system according to claim 1, characterized in that: The first switch group includes at least a first switch and a second switch, the second switch group includes at least a third switch and a fourth switch, the first switch, the second switch, the third switch and the fourth switch are all single-pole double-throw switches; wherein, The fixed end of the first switch is connected to the positive electrode of the battery, and the movable end of the first switch is connected to the first end of the DC charging power supply or the fixed end of the third switch; The fixed end of the second switch is connected to the negative electrode of the battery, and the movable end of the second switch is connected to the second end of the DC charging power supply or the fixed end of the fourth switch; The moving end of the third switch is connected to the first end of the large current generator or the first end of the variable load; The moving end of the fourth switch is connected to the second end of the large current generator or the second end of the variable load.

3. The battery charging system according to claim 2, characterized in that: The control system is specifically used to control the moving end of the first switch to be connected to the first end of the DC charging power supply, and control the moving end of the second switch to be connected to the second end of the DC charging power supply when the battery is placed in the charging compartment, so as to perform a charging operation on the battery.

4. The battery charging system according to claim 3, characterized in that: The power parameters include at least the charging voltage and the charging current of the battery, and the control system is further used for: When the charging voltage reaches the rated voltage of the battery, the moving end of the first switch is controlled to be connected to the fixed end of the third switch, and the moving end of the second switch is controlled to be connected to the fixed end of the fourth switch, so as to perform a safety detection operation on the battery.

5. The battery charging system according to claim 4, characterized in that: In the case of detecting the overcharge protection function of the battery, the control system is specifically used for: Controlling the moving end of the third switch to be connected to the first end of the high current generator, and controlling the moving end of the fourth switch to be connected to the second end of the high current generator; adjusting the output current of the high current generator to overcharge the battery, so that the output current is a first preset multiple of the battery capacity of the battery, and detecting the charging voltage and the charging current in real time; In the case where the charging voltage is greater than or equal to the rated voltage, if the charging current becomes 0 within a first preset time period, it is determined that the battery has an overcharge protection function; otherwise, it is determined that the battery does not have an overcharge protection function.

6. The battery charging system according to claim 4, characterized in that: In the case of detecting the over-discharge protection function of the battery, the control system is specifically used for: Controlling the moving end of the third switch to be connected to the first end of the variable load, and controlling the moving end of the fourth switch to be connected to the second end of the variable load; Adjusting the resistance value of the variable load to over-discharge the battery, so that the battery is discharged according to a current of a second preset multiple of the battery capacity, and detecting the charging voltage in real time; If the charging voltage becomes 0 within the second preset time period, it is determined that the battery has an over-discharge protection function; otherwise, it is determined that the battery does not have an over-discharge protection function.

7. The battery charging system according to claim 6, characterized in that: When the charging voltage does not become 0 within the second preset time period, the control system controls the active end of the third switch and / or the fourth switch to disconnect from the variable load.

8. The battery charging system according to claim 4, characterized in that: The control system is also used to: after the safety detection operation on the battery is completed, control the moving end of the first switch to be connected to the first end of the DC charging power supply, and control the moving end of the second switch to be connected to the second end of the DC charging power supply.

9. The battery charging system according to any one of claims 1 to 8, characterized in that: The control system is also used to: after the battery is placed in the charging compartment, receive the battery type, the rated voltage of the battery and the battery capacity of the battery input by the user in the operation interface; wherein the operation interface is communicatively connected with the control system.

10. The battery charging system according to claim 1, characterized in that: The control system is also used to display the charging result and the safety detection result on the operation interface.

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