Activation detection device for battery pack of welding machine

Abstract

The utility model discloses an activation detection device of a welding machine battery pack, and relates to the technical field of optical cable construction. The device comprises a key control circuit, a charging and discharging circuit and a master control MCU circuit, the main control MCU circuit is connected with the key control circuit, the charging and discharging circuit and the welding machine battery pack. The main control MCU circuit and the charging and discharging circuit are connected with the welding machine battery pack through a battery pack J1 interface. The main control MCU circuit is used for acquiring the electric quantity of the welding machine battery pack and controlling the charging and discharging circuit to charge and discharge the welding machine battery pack according to the electric quantity of the welding machine battery pack; the key control circuit is used for sending an activation instruction to the main control MCU circuit, the main control MCU circuit activates the welding machine battery pack after receiving the activation instruction, and the battery pack charging and activation device can simplify the charging and activation operation process of the battery pack so as to improve the operation efficiency and can control the electric quantity of the battery pack after discharging.

Description

Technical Field

[0001] The utility model relates to the technical field of optical cable construction, in particular to an activation detection device for a battery pack of a welding machine. Background Art

[0002] When using a fiber fusion splicer, it is necessary to ensure that the battery pack of the fusion splicer is in an activated state and has a certain amount of power. In order to improve the stability of the battery pack, a series of operations such as activation, charging and discharging of the battery pack are required. The existing battery pack operation methods are as follows:

[0003] 1): Use the debugger dedicated to the battery pack of the welding machine to activate and detect the battery pack through the host computer software on the computer.

[0004] 2): Place the battery pack on the fiber optic fusion splicer and use an adapter to connect the fiber optic fusion splicer to charge the battery.

[0005] 3): Connect the battery pack to the electronic load meter through the adapter board and then discharge it.

[0006] Existing battery pack operation methods use many components, which makes the battery pack charging and activation operations complicated, the operation efficiency is low, and the battery pack power after discharge is uncontrollable. Summary of the invention

[0007] The utility model aims to provide an activation detection device for a battery pack of a welding machine, which can simplify the battery pack charging and activation operation process to improve the operation efficiency and can control the power of the battery pack after discharge.

[0008] To achieve the above purpose, the utility model provides the following solutions:

[0009] An activation detection device for a welding machine battery pack, comprising:

[0010] Button control circuit, charging and discharging circuit and main control MCU circuit;

[0011] The main control MCU circuit is connected to the key control circuit, the charging and discharging circuit and the welding machine battery pack respectively, and the main control MCU circuit and the charging and discharging circuit are both connected to the welding machine battery pack through the battery pack J1 interface;

[0012] The main control MCU circuit is used to obtain the power of the welding machine battery pack, and control the charging and discharging circuit to charge and discharge the welding machine battery pack according to the power of the welding machine battery pack;

[0013] The button control circuit is used to send an activation instruction to the main control MCU circuit, and the main control MCU circuit activates the welding machine battery pack after receiving the activation instruction.

[0014] Optionally, the activation detection device for the welding machine battery pack further includes: an OLED display circuit; and the main control MCU circuit is connected to the OLED display circuit.

[0015] Optionally, the activation detection device for the welding machine battery pack further includes: a power supply circuit; the main control MCU circuit, the OLED display circuit and the charging and discharging circuit are all connected to a power source through the power supply circuit.

[0016] Optionally, the main control MCU circuit is an MCU chip.

[0017] Optionally, the communication interface of the main control MCU circuit is connected to the communication interface of the fuel gauge chip in the battery pack of the welding machine through the battery pack J1 interface.

[0018] Optionally, the charging and discharging circuit includes:

[0019] A first PMOS tube, a second PMOS tube, a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a load resistor, a first light emitting diode, a second light emitting diode and a charging chip;

[0020] The gate of the first PMOS tube is connected to one end of the first resistor, and the other end of the first resistor is connected to the main control MCU circuit; the source of the first PMOS tube is connected to the power supply; the VCC pin of the charging chip is connected to the drain of the first PMOS tube, one end of the second resistor and the positive electrode of the first capacitor; the other end of the second resistor is connected to the positive electrode of the first light-emitting diode; the cathode of the first light-emitting diode is connected to the CHRG pin of the charging chip;

[0021] The PROG pin of the charging chip is connected to one end of the third resistor, and the BAT pin of the charging chip is respectively connected to the positive electrode of the second capacitor, the No. 3 pin of the battery pack J1 interface, and the source electrode of the second PMOS tube;

[0022] The GND pin of the charging chip, the negative electrode of the first capacitor, the other end of the third resistor, the negative electrode of the second capacitor, and the pin 4 of the J1 interface of the battery pack are all grounded;

[0023] The gate of the second PMOS tube is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the main control MCU circuit, the drain of the second PMOS tube is connected to the anode of the second light-emitting diode, the cathode of the second light-emitting diode is connected to one end of the load resistor, and the other end of the load resistor is grounded.

[0024] Optionally, the power supply circuit includes:

[0025] A step-down chip, a switching diode, a first diode, a second diode, a fifth resistor, a third capacitor, a fourth capacitor and a fifth capacitor; the positive electrode of the switching diode, the positive electrode of the first diode and the positive electrode of the second diode are all connected to a power supply; the negative electrode of the first diode and the negative electrode of the second diode are both connected to the charge and discharge circuit, the negative electrode of the switching diode is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the VIN pin of the step-down chip and the positive electrode of the third capacitor, the negative electrode of the third capacitor and the GND pin of the step-down chip are both grounded; the VOUT pin of the step-down chip, the positive electrode of the fourth capacitor, the positive electrode of the fifth capacitor, the main control MCU circuit and the OLED display circuit are connected; the negative electrode of the fourth capacitor and the negative electrode of the fifth capacitor are both grounded.

[0026] Optionally, the OLED display circuit includes: an OLED display screen, a display chip, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;

[0027] The OLED display screen is connected to the display chip; the GND pin of the display chip is grounded, and the VCC pin of the display chip, one end of the sixth resistor, and one end of the seventh resistor are all connected to a power supply; the SCL pin of the display chip is respectively connected to the other end of the sixth resistor and one end of the eighth resistor, and the SDA pin of the display chip is respectively connected to the other end of the seventh resistor and one end of the ninth resistor; the other end of the eighth resistor and the other end of the ninth resistor are both connected to the main control MCU circuit.

[0028] According to the specific embodiments provided by the utility model, the utility model discloses the following technical effects:

[0029] The utility model discloses an activation detection device for a welding machine battery pack, comprising: a key control circuit, a charge and discharge circuit and a main control MCU circuit; the main control MCU circuit is respectively connected with the key control circuit, the charge and discharge circuit and the welding machine battery pack, and the main control MCU circuit and the charge and discharge circuit are both connected with the welding machine battery pack through a battery pack J1 interface; the main control MCU circuit is used to obtain the power of the welding machine battery pack, and controls the charge and discharge circuit to charge and discharge the welding machine battery pack according to the power of the welding machine battery pack; the key control circuit is used to send an activation instruction to the main control MCU circuit, and the main control MCU circuit activates the welding machine battery pack after receiving the activation instruction, and integrates the activation function and the charge and discharge function into one device, so that many devices are not needed during the operation process, the battery pack charging and activation operation process can be simplified, and the operation efficiency can be improved, and the charge and discharge circuit is controlled to charge and discharge the welding machine battery pack according to the power of the welding machine battery pack, so as to control the power of the battery pack after discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0031] Figure 1 This is a structural block diagram of the activation detection device for the battery pack of the welding machine provided by the utility model;

[0032] Figure 2 A circuit diagram of an OLED display circuit in an activation detection device for a battery pack of a welding machine provided by the utility model;

[0033] Figure 3 This is a structural diagram of the MCU chip in the activation detection device of the welding machine battery pack provided by the utility model;

[0034] Figure 4 A circuit diagram of a key control circuit in an activation detection device for a battery pack of a welding machine provided by the utility model;

[0035] Figure 5 A circuit diagram of a power supply circuit in an activation detection device for a battery pack of a welding machine provided by the utility model;

[0036] Figure 6 A circuit diagram of a charging and discharging circuit in an activation detection device for a battery pack of a welding machine provided by the utility model;

[0037] Figure 7 This is a SUMBUS communication flow chart in the activation detection device for the welding machine battery pack provided by the utility model;

[0038] Figure 8 This is a conventional charging flow chart;

[0039] Fig. 9 This is a conventional discharge flow chart;

[0040] Fig.10 A flow chart of battery pack charging and discharging in the activation detection device for the battery pack of the welding machine provided by the utility model;

[0041] Fig.11 This is an appearance diagram of the activation detection device for the welding machine battery pack provided by the utility model;

[0042] Fig.12 A front view of the activation detection device for the battery pack of the welding machine provided by the utility model;

[0043] Fig.13This is a flow chart of the use of the activation detection device for the welding machine battery pack provided by the utility model.

[0044] Explanation of symbols:

[0045] Battery pack J1 interface—Barrery, first PMOS tube—Q5, second PMOS tube—Q6, first capacitor—C67, second capacitor—C68, first resistor—R88, second resistor—R86, third resistor—R84, fourth resistor—R89, load resistor—R5, first light-emitting diode—D4, second light-emitting diode—D6, charging chip—U19, step-down chip—U8, switching diode—D31, fifth resistor—R9, third capacitor—C11, fourth capacitor—C12, fifth capacitor—C13, display chip—U5, sixth resistor—R160, seventh resistor—R165, eighth resistor—R166, ninth resistor—R161, UP key—UP, DOWN key—DOWN, OK key—OK, BACK key—BACK. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0047] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0048] In order to overcome the defects of the prior art in the process of battery pack activation, charging / discharging, and detection, such as complex and cumbersome operations and low operating efficiency, the utility model provides an activation and detection device for a battery pack of a welding machine, which integrates the functions of battery pack activation, charging / discharging, and detection into one module, which not only simplifies the operation process, but also reduces the difficulty of operation. Figure 1As shown, the activation detection device for the welding machine battery pack provided by the utility model includes: a key control circuit, a charge and discharge circuit and a main control MCU circuit; the main control MCU circuit is respectively connected to the key control circuit, the charge and discharge circuit and the welding machine battery pack, and the main control MCU circuit and the charge and discharge circuit are both connected to the welding machine battery pack through the battery pack J1 interface Barrery; the main control MCU circuit is used to obtain the power of the welding machine battery pack, and control the charge and discharge circuit to charge and discharge the welding machine battery pack according to the power of the welding machine battery pack; the key control circuit is used to send an activation instruction to the main control MCU circuit, and the main control MCU circuit activates the welding machine battery pack after receiving the activation instruction.

[0049] In practical applications, the activation detection device for the welding machine battery pack also includes: an OLED display circuit; the main control MCU circuit is connected to the OLED display circuit.

[0050] In practical applications, the activation detection device for the welding machine battery pack also includes: a power supply circuit; the main control MCU circuit, the OLED display circuit and the charging and discharging circuit are all connected to the power supply through the power supply circuit.

[0051] In practical applications, the main control MCU circuit is an MCU chip, and the model may be ESP32_C3. Figure 3 shown.

[0052] In practical applications, the communication interface of the main control MCU circuit is connected to the communication interface of the fuel gauge chip in the battery pack of the welding machine through the battery pack J1 interface Barrery. Specifically, this device is connected through Fig.11 After the Power interface shown is connected to the adapter, the battery pack of the welding machine is connected to the battery pack J1 interface Barrery, the 5th pin of the MCU chip is connected to the 1st pin of the battery pack J1 interface Barrery, and the 4th pin of the MCU chip is connected to the 2nd pin of the battery pack J1 interface Barrery, so that the MCU chip and the battery pack of the welding machine communicate through the SMBUS protocol. The MCU sends instructions (activation instructions or other instructions) to the battery pack through the SMBUS protocol. After receiving the instructions, the battery pack will return the data corresponding to the instructions, and the MCU will receive and process the data. The SUMBUS communication process is as follows Figure 7 shown.

[0053] In practical applications, such as Figure 6As shown, the charging and discharging circuit includes: a first PMOS tube Q5, a second PMOS tube Q6, a first capacitor C67, a second capacitor C68, a first resistor R88, a second resistor R86, a third resistor R84, a fourth resistor R89, a load resistor R5, a first light-emitting diode D4, a second light-emitting diode D6 and a charging chip U19; the gate of the first PMOS tube Q5 is connected to one end of the first resistor R88, and the other end of the first resistor R88 is connected to the main control MCU circuit; the source of the first PMOS tube Q5 is connected to the power supply; the VCC pin of the charging chip U19 is connected to the drain of the first PMOS tube Q5, one end of the second resistor R86 and the positive electrode of the first capacitor C67; the other end of the second resistor R86 is connected to the positive electrode of the first light-emitting diode D4; the cathode of the first light-emitting diode D4 is connected to the CHRG pin of the charging chip U19; the charging chip U1 The PROG pin of the charging chip U19 is connected to one end of the third resistor R84, and the BAT pin of the charging chip U19 is respectively connected to the positive electrode of the second capacitor C68, the No. 3 pin of the battery pack J1 interface Barrery, and the source electrode of the second PMOS tube Q6; the GND pin of the charging chip U19, the negative electrode of the first capacitor C67, the other end of the third resistor R84, the negative electrode of the second capacitor C68, and the No. 4 pin of the battery pack J1 interface Barrery are all grounded; the gate of the second PMOS tube Q6 is connected to one end of the fourth resistor R89, and the other end of the fourth resistor R89 ​​is connected to the main control MCU circuit, the drain of the second PMOS tube Q6 is connected to the positive electrode of the second light-emitting diode D6, and the negative electrode of the second light-emitting diode D6 is connected to one end of the load resistor R5, and the other end of the load resistor R5 is grounded. The model of the charging chip U19 is HE4054B. The MCU chip can control the on / off of the first PMOS tube Q5 and the second PMOS tube Q6 through the I / O pin to realize the charging / discharging function. like Fig.10 As shown in the figure, the MCU can automatically obtain the battery pack power and other information in real time, and then judge whether to charge or discharge the battery pack based on the obtained battery pack power. When the detected power is less than the preset charging value, it will automatically charge and the charging indicator light will turn on. Fig.11 and Fig.12 The first light-emitting diode D4 in the Charge is lit, the MCU controls the charging channel to open, and closes the discharge channel. When the detected power is equal to the preset charging value, the charging channel is closed and the charging ends; when the detected power is greater than the preset charging value, it automatically discharges and the discharge indicator light turns on. Fig.11 and Fig.12Disharge, that is, the second light-emitting diode D6 lights up, the MCU will control the charging channel to close, open the discharge channel, and connect the battery pack to the load resistor R5 for continuous discharge. When the detected power is equal to the preset discharge value, the discharge channel is closed and the discharge ends. Specifically: When the battery power is lower than the preset charging value, the battery pack needs to be charged. At this time, the MCU chip controls the Charge_Control pin, that is, the No. 0 pin, to output a low level, the first PMOS tube Q5 is turned on, the first light-emitting diode D4 is lit, and the input voltage VCC of the charging chip U19 is equal to VCC_IN. At this time, the battery pack is charged through the charging chip U19. When the power reaches the preset value, the MCU chip controls the Charge_Control pin, that is, the No. 0 pin, to output a high level, and the first PMOS tube Q5 is turned off. During charging, the Discharge_Control pin, that is, the No. 1 pin, outputs a high level, and the second PMOS tube Q6 remains turned off. When the battery pack power is greater than the preset discharge value, the battery pack needs to be discharged. The MCU chip controls the Discharge_Control pin, i.e., pin 1, to output a low level, the second PMOS tube Q6 is turned on, and the second light-emitting diode D6 is lit. At this time, the input voltage VCC of the charging chip U19 is 0, and the battery pack and the load resistor R5 form a loop to continuously discharge. When the remaining power is equal to the preset discharge value, the MCU chip controls the Discharge_Control pin, i.e., pin 1, to output a high level, and the second PMOS tube Q6 is turned off. During discharge, the Charge_Control pin, i.e., pin 0, outputs a high level, and the first PMOS tube Q5 remains turned off.

[0054] In practical applications, such as Figure 5 As shown, the power supply circuit includes: a buck chip U8, a switching diode D31, a first diode, a second diode, a fifth resistor R9, a third capacitor C11, a fourth capacitor C12 and a fifth capacitor C13; the positive electrode of the switching diode D31, the positive electrode of the first diode and the positive electrode of the second diode are all connected to the power supply; the negative electrode of the first diode and the negative electrode of the second diode are both connected to the charging and discharging circuit, the negative electrode of the switching diode D31 is connected to one end of the fifth resistor R9, and the other end of the fifth resistor R9 is connected to the VIN pin of the buck chip U8 and the positive electrode of the third capacitor C11, and the negative electrode of the third capacitor C11 and the GND pin of the buck chip U8 are both grounded; the VOUT pin of the buck chip U8, the positive electrode of the fourth capacitor C12, the positive electrode of the fifth capacitor C13, the main control MCU circuit and the OLED display circuit are connected; the negative electrode of the fourth capacitor C12 and the negative electrode of the fifth capacitor C13 are both grounded. The power supply part provides two end element interfaces X31 and X32. Fig.11The Power interface shown is connected to the adapter, and the step-down chip U8 (LDO chip model CE6303) steps down the input voltage and outputs it. This output voltage is used to power the MCU chip and the OLED display circuit. The switching diode D31 can effectively suppress the reverse voltage and effectively protect the circuit.

[0055] In practical applications, such as Figure 2 As shown, the OLED display circuit includes: an OLED display screen, a display chip U5, a sixth resistor R160, a seventh resistor R165, an eighth resistor R166 and a ninth resistor R161; the OLED display screen and the display chip U5, the GND pin of the display chip U5 is grounded, the VCC pin of the display chip U5, one end of the sixth resistor R160, and one end of the seventh resistor R165 are all connected to the power supply; the SCL pin of the display chip U5 is respectively connected to the other end of the sixth resistor R160 and one end of the eighth resistor R166, and the SDA pin of the display chip U5 is respectively connected to the other end of the seventh resistor R165 and one end of the ninth resistor R161; the other end of the eighth resistor R166 and the other end of the ninth resistor R161 are both connected to the main control MCU circuit, specifically, the other end of the eighth resistor R166 is connected to the No. 7 pin of the MCU chip, and the other end of the ninth resistor R161 is connected to the No. 10 pin of the MCU chip, and the display function of the OLED is realized by the MCU chip control through the IIC protocol.

[0056] In practical applications, such as Figure 4 As shown, the key control circuit includes an UP key UP, a DOWN key DOWN, an OK key OK, and a BACK key BACK. The first end of the UP key UP, the first end of the DOWN key DOWN, the first end of the OK key OK, and the first end of the BACK key BACK are all grounded. The second end, the third end, and the fourth end of the UP key UP are connected to form a total connection end KEY_UP of the UP key UP. The second end, the third end, and the fourth end of the DOWN key DOWN are connected to form a total connection end KEY_DOWN of the DOWN key DOWN. The second end, the third end, and the fourth end of the OK key OK are connected to form a total connection end KEY_OK of the OK key OK. The second end, the third end, and the fourth end of the BACK key BACK are connected to form a total connection end KEY_BACK of the BACK key BACK. The KEY_DOWN, KEY_UP, KEY_OK, and KEY_BACK ends are respectively connected to pins 8, 9, 18, and 19 of the MCU chip. The MCU chip realizes the corresponding key function through key detection.

[0057] Fig.11 and Fig.12It is the appearance diagram and front view of the activation detection device of the welding machine battery pack. The shell of the activation detection device of the welding machine battery pack is provided with buttons, indicator lights, namely the first light-emitting diode D4 and the second light-emitting diode D6, an OLED display screen, a battery pack J1 interface Barrery and a power supply port.

[0058] The specific use process of the above device includes:

[0059] like Fig.13 As shown, connect the adapter through Fig.11 The Power interface shown is connected to the device provided in the above embodiment. After long pressing the OK button to turn on the device, connect the battery pack to the battery pack J1 interface Barrery to realize the connection with the MCU chip and the charging and discharging circuit. The MCU chip will automatically obtain the battery pack information and display it on the OLED display. When you only need to charge and discharge the battery, no operation is required. The device will automatically control the battery pack to charge or discharge according to the preset charge / discharge value. When you need to use the key function, long press the UP button UP to turn on the key function, and you can activate the battery, modify the charge / discharge preset value, and so on. Long press the BACK button BACK to exit the key function mode. The device will also process the acquired data (voltage, power and temperature) and prompt it through the OLED display. After the operation is completed, disconnect the battery pack from the device. The welding machine battery pack has a built-in power meter chip, which can communicate with the battery pack power meter chip through the SMBUS protocol and obtain voltage, power and temperature.

[0060] The beneficial effects of the utility model are:

[0061] 1) In order to increase the practicality and operability of the utility model, the utility model is designed with an OLED display circuit and a key control circuit. The MCU will display the processed battery pack information through the OLED, and the operator can select functions by pressing the key in combination with the OLED, such as battery pack activation and battery pack detection.

[0062] 2) Figure 8 This is a conventional charging flow chart. Fig. 9 This is a conventional discharge flow chart. Conventional charging and discharging requires a fiber optic fusion splicer and an electronic load meter to operate. The operation process is not only cumbersome but also requires the user to understand the wiring and functions of the electronic load meter, which is not easy to operate. Fig.10 The battery pack charging and discharging flow chart in the activation detection device of the welding machine battery pack provided by the utility model can effectively solve the defects in the conventional charging and discharging process. After the utility model is turned on and connected to the battery pack, it can automatically identify the battery pack power and charge or discharge. The operation is simple and convenient, and the production efficiency and battery pack stability are effectively improved.

[0063] 3) In an environment without a computer or a dedicated debugger for a battery pack, the activation, charging, discharging and detection of the battery pack can be realized through a simple connection, which is simple and convenient to operate.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core ideas of the utility model. At the same time, for those skilled in the art, according to the ideas of the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. An activation detection device for a welding machine battery pack, characterized in that: include: Button control circuit, charging and discharging circuit and main control MCU circuit; The main control MCU circuit is connected to the key control circuit, the charging and discharging circuit and the welding machine battery pack respectively, and the main control MCU circuit and the charging and discharging circuit are both connected to the welding machine battery pack through the battery pack J1 interface; The main control MCU circuit is used to obtain the power of the welding machine battery pack, and control the charging and discharging circuit to charge and discharge the welding machine battery pack according to the power of the welding machine battery pack; The button control circuit is used to send an activation instruction to the main control MCU circuit, and the main control MCU circuit activates the welding machine battery pack after receiving the activation instruction.

2. The activation detection device for a welding machine battery pack according to claim 1, characterized in that: Also includes: OLED display circuit; the main control MCU circuit is connected to the OLED display circuit.

3. The activation detection device for a welding machine battery pack according to claim 2, characterized in that: Also includes: Power supply circuit; The main control MCU circuit, the OLED display circuit and the charging and discharging circuit are all connected to a power source through the power supply circuit.

4. The activation detection device for a welding machine battery pack according to claim 1, characterized in that: The main control MCU circuit is an MCU chip.

5. The activation detection device for a welding machine battery pack according to claim 1, characterized in that: The communication interface of the main control MCU circuit is connected to the communication interface of the fuel gauge chip in the battery pack of the welding machine through the battery pack J1 interface.

6. The activation detection device for a welding machine battery pack according to claim 1, characterized in that: The charging and discharging circuit comprises: A first PMOS tube, a second PMOS tube, a first capacitor, a second capacitor, a first resistor, a second resistor, a third resistor, a fourth resistor, a load resistor, a first light emitting diode, a second light emitting diode and a charging chip; The gate of the first PMOS tube is connected to one end of the first resistor, and the other end of the first resistor is connected to the main control MCU circuit; the source of the first PMOS tube is connected to the power supply; the VCC pin of the charging chip is connected to the drain of the first PMOS tube, one end of the second resistor and the positive electrode of the first capacitor; the other end of the second resistor is connected to the positive electrode of the first light-emitting diode; the cathode of the first light-emitting diode is connected to the CHRG pin of the charging chip; The PROG pin of the charging chip is connected to one end of the third resistor, and the BAT pin of the charging chip is respectively connected to the positive electrode of the second capacitor, the No. 3 pin of the battery pack J1 interface, and the source electrode of the second PMOS tube; The GND pin of the charging chip, the negative electrode of the first capacitor, the other end of the third resistor, the negative electrode of the second capacitor, and the pin 4 of the J1 interface of the battery pack are all grounded; The gate of the second PMOS tube is connected to one end of the fourth resistor, the other end of the fourth resistor is connected to the main control MCU circuit, the drain of the second PMOS tube is connected to the anode of the second light-emitting diode, the cathode of the second light-emitting diode is connected to one end of the load resistor, and the other end of the load resistor is grounded.

7. The activation detection device for a welding machine battery pack according to claim 3, characterized in that: The power supply circuit comprises: A step-down chip, a switching diode, a first diode, a second diode, a fifth resistor, a third capacitor, a fourth capacitor and a fifth capacitor; the positive electrode of the switching diode, the positive electrode of the first diode and the positive electrode of the second diode are all connected to a power supply; the negative electrode of the first diode and the negative electrode of the second diode are both connected to the charge and discharge circuit, the negative electrode of the switching diode is connected to one end of the fifth resistor, the other end of the fifth resistor is connected to the VIN pin of the step-down chip and the positive electrode of the third capacitor, the negative electrode of the third capacitor and the GND pin of the step-down chip are both grounded; the VOUT pin of the step-down chip, the positive electrode of the fourth capacitor, the positive electrode of the fifth capacitor, the main control MCU circuit and the OLED display circuit are connected; the negative electrode of the fourth capacitor and the negative electrode of the fifth capacitor are both grounded.

8. The activation detection device for a welding machine battery pack according to claim 2, characterized in that: The OLED display circuit comprises: an OLED display screen, a display chip, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor; The OLED display screen is connected to the display chip; the GND pin of the display chip is grounded, and the VCC pin of the display chip, one end of the sixth resistor, and one end of the seventh resistor are all connected to a power supply; the SCL pin of the display chip is respectively connected to the other end of the sixth resistor and one end of the eighth resistor, and the SDA pin of the display chip is respectively connected to the other end of the seventh resistor and one end of the ninth resistor; the other end of the eighth resistor and the other end of the ninth resistor are both connected to the main control MCU circuit.

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