Photovoltaic support battery protection circuit with charging management and heating management

Abstract

The utility model relates to the technical field of lithium batteries, in particular to a photovoltaic support battery protection circuit with charging management and heating management, which comprises a linear voltage stabilizing circuit module, a charger detection circuit module, a heating management circuit module, a charging management circuit module and a lithium battery protection circuit module. A heating management circuit and a charging management circuit are designed, floating charging and low-electric-quantity large-current charging are avoided, and the conflict between large-current charging and system power supply is effectively avoided. Due to the design of the same charging and discharging port, the system control panel does not need additional interfaces, and can be compatible with products without charging and heating management. And the normal-temperature battery cell is adopted to meet the requirement of low-temperature charging, so that the battery cost is reduced while the endurance time is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium batteries, in particular to a photovoltaic support battery protection circuit with charging management and heating management. Background Art

[0002] At present, most photovoltaic bracket battery packs are directly charged using a switching power supply without a charging management circuit. Since the switching power supply and the battery are used in parallel in the system, the switching power supply powers the bracket and charges the battery at the same time, so the output current of the switching power supply is generally large. However, high current charging is more dangerous. Therefore, the industry currently generally uses a dual power supply design, one power supply charges the battery, and the other power supply powers the host. At the same time, for different batteries, it is also necessary to match the charging power supply to control the CC charging current and CV charging voltage.

[0003] Photovoltaic bracket battery packs require low-temperature charging; there are currently two mainstream designs. One uses batteries that can be charged at low temperatures, but the disadvantage is that it has high requirements for the battery, and low-temperature batteries generally have low capacity, which requires sacrificing battery life. The other battery pack has a reserved heating device inside, and the host side controls the battery heating. The disadvantage is that it has high requirements for the host, which requires the host to have temperature detection function and heating logic control.

[0004] In addition, batteries that currently require charging management or battery heating management generally use a separate charging and discharging port design and are not compatible with other products.

[0005] Therefore, it is necessary to design a photovoltaic bracket battery protection circuit with charging management and heating management, which can realize charging and discharging at the same port while realizing charging and heating management. Summary of the invention

[0006] The utility model aims to overcome the deficiencies of the prior art and provides a photovoltaic bracket battery protection circuit with charging management and heating management, which realizes charging and discharging at the same port while realizing charging and heating management.

[0007] In order to achieve the above-mentioned purpose, the utility model is a photovoltaic bracket battery protection circuit with charging management and heating management, comprising a linear voltage stabilizing circuit module, a charger detection circuit module, a heating management circuit module, a charging management circuit module, and a lithium battery protection circuit module. The P+ port of the linear voltage stabilizing circuit module and the P+ port of the charger detection circuit module are connected to the P+ port of the lithium battery protection circuit module, the P- port of the linear voltage stabilizing circuit module and the P- port of the charger detection circuit module are connected to the P- port of the lithium battery protection circuit module, the 5V port of the linear voltage stabilizing circuit module is connected to the 5V port of the charger detection circuit module, the C+ port of the charger detection circuit module is connected to the C+ port of the heating management circuit module and the C+ port of the charging management circuit module, the C- port of the charger detection circuit module is connected to the C- port of the heating management circuit module and the C- port of the charging management circuit module, and the B+ port of the charging management circuit module is connected to the B+ port of the lithium battery protection circuit module.

[0008] The linear voltage stabilizing circuit module comprises a diode, a resistor, a triode, a voltage stabilizing tube, a three-terminal voltage stabilizing tube, and a capacitor. The P+ port of the linear voltage stabilizing circuit module is connected to the anode of the diode 16. The cathode of the diode 16 is connected in series with the resistor 75, and then divided into four paths, respectively connected to the collector of the triode 4, the collector of the triode 5, one end of the resistor 76, and one end of the resistor 77. The base of the triode 4 is divided into two paths, respectively connected to the base of the triode 5 and the emitter of the triode 6. The collector of the triode 6 is connected to the other end of the resistor 76. The base of the triode 6 is divided into two paths, respectively connected to the other end of the resistor 77 and the cathode of the voltage stabilizing tube 1. The emitter of transistor four is divided into four paths and respectively connected to the emitter of transistor five, one end of capacitor forty-three, one end of capacitor forty-four, and pin 2 of three-terminal voltage regulator one. Pin 3 of three-terminal voltage regulator one is divided into two paths and respectively connected to one end of capacitor forty-five and one end of capacitor forty-six. Pin 3 of three-terminal voltage regulator one is the 5V port of the linear voltage regulator circuit module. The anode of voltage regulator one, the other end of capacitor forty-three, the other end of capacitor forty-four, the other end of capacitor forty-five, the other end of capacitor forty-six, and pin 1 of the three-terminal voltage regulator one are connected to the P- ground terminal. Pin 1 of the three-terminal voltage regulator one is the P- port of the linear voltage regulator circuit module.

[0009] The charger detection circuit module includes a resistor, a comparator, a capacitor, a triode, a MOS tube, and an electrolytic capacitor. The P+ port of the charger detection circuit module is divided into three paths, which are respectively connected to one end of resistor 18, one end of resistor 12, and the source of MOS tube 2. The other end of resistor 18 is divided into two paths, which are respectively connected to one end of resistor 21 and one end of resistor 19. The other end of resistor 21 is connected to one end of resistor 17. The other end of resistor 19 is connected to the in-phase input end of comparator 1. The 5V port of the charger detection circuit module is divided into three paths, which are respectively connected to one end of resistor 73, one end of capacitor 10, and the positive power supply end of comparator 1. The other end of resistor 73 is divided into two paths, which are respectively connected to one end of resistor 74 and one end of resistor 20. The other end of resistor 20 is connected to the inverting input end of comparator 1. After the output end of comparator 1 is connected in series with resistor 14, it is divided into two paths. It is connected to one end of resistor sixty-eight and the base of transistor two. The collector of transistor two is divided into two paths and is respectively connected to the other end of resistor twelve and the gate of MOS tube two. The drain of MOS tube two is divided into five paths and is respectively connected to the positive electrode of electrolytic capacitor three, the positive electrode of electrolytic capacitor four, one end of capacitor six, one end of capacitor seven, and one end of capacitor eight. The drain of MOS tube two is the C+ port of the charger detection circuit module. The other end of resistor seventeen, the other end of resistor seventy-four, the negative power supply end of comparator one, the other end of resistor sixty-eight, the emitter of transistor two, the negative electrode of electrolytic capacitor three, the negative electrode of electrolytic capacitor four, the other end of capacitor six, the other end of capacitor seven, the other end of capacitor eight, and the other end of capacitor ten are connected to the P- ground terminal. The other end of resistor seventeen is the P- port of the charger detection circuit module, and the other end of capacitor eight is the C- port of the charger detection circuit module.

[0010] The heating management circuit module includes a resistor, a comparator, a capacitor, a triode, a MOS tube, a temperature switch, a heating plate, a thermistor, and a three-terminal voltage regulator tube. The C+ port of the heating management circuit module is divided into four paths, which are respectively connected to one end of resistor one, one end of resistor two, the source of MOS tube one, and the source of MOS tube nine. The other end of resistor one is divided into six paths, which are respectively connected to one end of resistor four, one end of resistor five, one end of resistor six, pin No. 2 of three-terminal voltage regulator tube two, the positive power supply end of comparator two, and one end of capacitor one. The other end of resistor four is divided into two paths, which are respectively connected to one end of resistor seven and pin No. 1 of three-terminal voltage regulator tube two. The other end of resistor five is connected in series with resistor eight, and then divided into two paths, which are respectively connected to one end of thermistor one and the in-phase input end of comparator two. The other end of resistor six is ​​divided into two paths, which are respectively connected to resistor nine The output end of comparator 2 is connected to one end of resistor 69 and the inverting input end of comparator 2. After resistor 3 is connected in series, the output end of comparator 2 is divided into two paths and respectively connected to one end of resistor 69 and the base of transistor 1. The collector of transistor 1 is divided into three paths and respectively connected to the other end of resistor 2, the gate of MOS tube 1 and the gate of MOS tube 9. The drain of MOS tube 1 is divided into two paths and respectively connected to the drain of MOS tube 9 and one end of temperature switch 2. The other end of temperature switch 2 is connected to one end of the heating plate. The other end of resistor 7 is divided into eight paths and connected to pin 3 of three-terminal voltage regulator tube 2, the other end of thermistor 1, the other end of resistor 9, the negative power supply end of comparator 2, the other end of resistor 69, the emitter of transistor 1, the other end of the heating plate and the other end of capacitor 1. The other end of resistor 7 is the C- port of the heating management circuit module.

[0011] The charging management circuit module includes a resistor, a capacitor, an inductor, a boost power management chip, a diode, and an electrolytic capacitor. The C+ port of the charging management circuit module is divided into six paths, which are respectively connected to one end of resistor seventy, one end of resistor fifteen, one end of resistor ten, one end of capacitor fourteen, one end of capacitor nine, and pin 30 of the boost power management chip. After the other end of resistor seventy is connected in series with resistor seventy-one, it is divided into five paths, which are respectively connected to one end of resistor seventy-two, one end of resistor twenty-three, VCC power supply, pin 7, and pin 3 of the boost power management chip. The other end of resistor twenty-three is connected to pin 4 of the boost power management chip. The other end of resistor ten is divided into two paths, which are respectively connected to one end of resistor sixteen and the drain of MOS tube three. The other end of resistor fifteen is connected to one end of resistor One end is divided into two paths and respectively connected to one end of capacitor 11 and pin 32 of the boost power management chip. The other end of resistor 16 is divided into two paths and respectively connected to the other end of capacitor 11 and pin 31 of the boost power management chip. The gate of MOS tube 3 is connected in series with resistor 13 and then connected to pin 28 of the boost power management chip. The source of MOS tube 3 is divided into four paths and respectively connected to one end of inductor 1, the drain of MOS tube 4, one end of capacitor 12 and pin 27 of the boost power management chip. The VCC power supply is connected to the anode of diode 2. The cathode of diode 2 is divided into two paths and respectively connected to the other end of capacitor 12 and pin 29 of the boost power management chip. The gate of MOS tube 4 is connected in series with resistor 67 and then connected to pin 26 of the boost power management chip. The VCC power supply is divided into two paths and respectively connected to one end of capacitor 13 and pin 24 of the boost power management chip. The other end of inductor 1 is divided into two paths and respectively connected to one end of resistor 11 and one end of resistor 22. The other end of resistor 22 is divided into two paths and respectively connected to one end of capacitor 15 and pin 18 of the boost power management chip. The other end of capacitor 15 is divided into two paths and respectively connected to one end of resistor 24 and pin 17 of the boost power management chip. The other end of resistor 24 is divided into twelve paths and respectively connected to the other end of resistor 11, the positive electrode of electrolytic capacitor 1, the positive electrode of electrolytic capacitor 2, one end of capacitor 2, one end of capacitor 3, one end of capacitor 4, one end of capacitor 5, one end of capacitor 16, the anode of diode 1, and resistor 26. One end of the boost power management chip, pin 19 of the boost power management chip, and the switching power supply are connected. The cathode of diode 1 is the B+ port of the charging management circuit module. The other end of resistor 26 is connected in series with resistor 25, and then divided into two paths to be connected to one end of resistor 27 and pin 16 of the boost power management chip. Pin 8 of the boost power management chip is connected to one end of resistor 28. Pin 9 of the boost power management chip is connected to one end of resistor 29. Pin 10 of the boost power management chip is connected to one end of resistor 30. Pin 12 of the boost power management chip is divided into two paths to be connected to one end of resistor 31 and one end of capacitor 17. Pin 15 of the boost power management chip is connected in series with resistor 32 and then connected to one end of capacitor 18.The other end of resistor 72, the other end of capacitor 9, the other end of capacitor 14, the source of MOS tube 4, the other end of capacitor 13, the negative electrode of electrolytic capacitor 1, the negative electrode of electrolytic capacitor 2, the other end of capacitor 2, the other end of capacitor 3, the other end of capacitor 4, the other end of capacitor 5, the other end of capacitor 16, the other end of resistor 27, the other end of resistor 28, the other end of resistor 29, the other end of resistor 31, the other end of capacitor 17, the other end of capacitor 18, pin 1, pin 2, pin 11, pin 14, and pin 25 of the boost power management chip are connected to the C- ground terminal, and the other end of resistor 72 is the C- port of the charging management circuit module.

[0012] The lithium battery protection circuit module includes a resistor, a capacitor, a diode, a voltage regulator, a triode, a MOS tube, a boost power management chip, a thermistor, a fuse, an analog front-end chip, a serial port, and a connector. The P+ port of the lithium battery protection circuit module is divided into five paths, which are respectively connected to the cathode of diode three, the cathode of diode four, the cathode of diode five, the cathode of diode nine, and one end of capacitor twenty-two. The other end of capacitor twenty-two is connected to one end of capacitor twenty-five. The anode of diode three is divided into three paths, which are respectively connected to the anode of diode four, the anode of diode five, and one end of the fuse. The anode of diode three is the B+ port of the lithium battery protection circuit module. The other end of the fuse is divided into five paths, which are respectively connected to one end of resistor thirty-four, resistor One end of resistor sixty-six, one end of resistor seventy-eight, one end of resistor seventy-nine, and serial port eight are connected. The other end of resistor thirty-four is divided into two paths and respectively connected to the anode of diode six and one end of capacitor twenty-one. The cathode of diode six is ​​divided into two paths and respectively connected to one end of resistor thirty-three and the cathode of voltage regulator tube two. The other end of resistor thirty-three is divided into four paths and respectively connected to one end of capacitor twenty, one end of capacitor nineteen, pin 28 of the analog front-end chip, and one end of resistor thirty-five. The other end of resistor thirty-five is connected to the cathode of diode seven, the anode of diode seven is connected to pin 1 of the connector, and the other end of resistor sixty-six is ​​divided into four paths and respectively connected to one end of capacitor forty-two, pin 2, pin 3, and pin 4 of the analog front-end chip. The other end of capacitor 42 is divided into three paths and respectively connected to pin 5 of the analog front-end chip, one end of capacitor 41, and one end of resistor 65. The other end of resistor 65 is divided into two paths and respectively connected to the other end of resistor 78 and serial port 7. The other end of capacitor 41 is divided into three paths and respectively connected to pin 6 of the analog front-end chip, one end of capacitor 40, and one end of resistor 42. The other end of resistor 42 is divided into two paths and respectively connected to the other end of resistor 79 and serial port 6. The other end of capacitor 40 is divided into three paths and respectively connected to pin 7 of the analog front-end chip, one end of capacitor 26, and one end of resistor 45. The other end of resistor 45 is connected to serial port 5. The other end of capacitor 26 is divided into three paths and respectively connected to pin 7 of the analog front-end chip, one end of capacitor 26, and one end of resistor 45. The chip is connected to pin 8, one end of capacitor 30, and one end of resistor 49. The other end of resistor 49 is connected to serial port 4. The other end of capacitor 30 is divided into three paths and respectively connected to pin 9 of the analog front-end chip, one end of capacitor 31, and one end of resistor 50. The other end of resistor 50 is connected to serial port 3. The other end of capacitor 31 is divided into three paths and respectively connected to pin 10 of the analog front-end chip, one end of capacitor 33, and one end of resistor 51. The other end of resistor 51 is connected to serial port 2. The other end of capacitor 33 is divided into four paths and respectively connected to pin 11 of the analog front-end chip, one end of capacitor 36, one end of resistor 54, and the cathode of diode 14. The other end of resistor 54 is connected to serial port 1.The other end of capacitor thirty-six is ​​divided into four paths and respectively connected to pin No. 12 of the analog front-end chip, one end of capacitor thirty-seven, one end of resistor fifty-six, and the cathode of diode fifteen. The other end of resistor fifty-six is ​​connected to one end of resistor sixty. Pin No. 26 of the analog front-end chip is connected in series with resistor thirty-eight and then connected to the anode of diode ten. Pin No. 25 of the analog front-end chip is connected to one end of resistor thirty-nine. The other end of resistor thirty-nine is divided into four paths and respectively connected to the drain of MOS tube six, the drain of MOS tube seven, the drain of MOS tube five, and the drain of MOS tube eight. Pin No. 24 of the analog front-end chip is connected in series with resistor forty and then divided into two paths and respectively connected to the emitter of transistor three and one end of resistor forty-four. The base of transistor 3 is divided into two paths, which are respectively connected to the other end of resistor 44 and one end of resistor 46. The collector of transistor 3 is connected to the anode of diode 11. The cathode of diode 11 is divided into four paths, which are respectively connected to the cathode of voltage regulator tube 3, one end of resistor 58, one end of resistor 63, and one end of resistor 64. The other end of resistor 63 is connected to the gate of MOS tube 6, and the other end of resistor 64 is connected to the gate of MOS tube 7. After resistor 41 is connected in series to pin 23 of the analog front-end chip, it is divided into four paths, which are respectively connected to one end of resistor 55, one end of resistor 57, one end of resistor 59, and the cathode of voltage regulator tube 4. The other end of resistor 55 is connected to the gate of MOS tube 5. The other end of pin 17 is connected to the gate of MOS tube 8, pin 22 of the analog front-end chip is connected to one end of resistor 43, pin 21 of the analog front-end chip is divided into three paths and respectively connected to the other end of resistor 43, one end of capacitor 23, and 5V power supply, pin 20 of the analog front-end chip is connected in series with resistor 36 and then connected to pin 2 of the connector, pin 19 of the analog front-end chip is connected in series with resistor 37 and then connected to pin 3 of the connector, pin 18 of the analog front-end chip is divided into two paths and respectively connected to one end of resistor 47 and one end of capacitor 27, pin 17 of the analog front-end chip is divided into two paths and respectively connected to one end of resistor 48 and one end of capacitor 28, and the analog front-end chip Pin 16 of the chip is divided into two paths and connected to one end of thermistor 2 and one end of capacitor 29 respectively. Pin 15 of the analog front-end chip is divided into three paths and connected to one end of resistor 52, one end of capacitor 32 and one end of capacitor 34 respectively. The other end of resistor 52 is divided into eight paths and connected to the other end of resistor 59, the anode of voltage regulator tube 4, the source of MOS tube 5, the source of MOS tube 8, one end of resistor 61, one end of resistor 62, one end of capacitor 39 and the CRS end respectively. The other end of capacitor 39 is connected to one end of capacitor 38. Pin 14 of the analog front-end chip is divided into three paths and connected to one end of resistor 53, the other end of capacitor 32 and one end of capacitor 35 respectively.The other end of capacitor 21, the anode of voltage regulator tube 2, the other end of capacitor 20, the other end of capacitor 19, the anode of diode 14, the anode of diode 15, the other end of capacitor 37, the other end of resistor 60, the other end of resistor 46, pin 13 of the analog front-end chip, the other end of capacitor 23, the other end of resistor 47, the other end of capacitor 27, the other end of resistor 48, the other end of capacitor 28, the other end of thermistor 2, the other end of capacitor 29, the other end of capacitor 34, the other end of capacitor 35, the other end of resistor 53, the other end of resistor 61, the other end of resistor 62, pin 4 of the connector are grounded, the other end of capacitor 25, the anode of diode 9, the cathode of diode 10, the anode of voltage regulator tube 3, the other end of resistor 58, the source of MOS tube 6, the source of MOS tube 7, the other end of capacitor 38 are connected to the P- ground terminal, and the other end of capacitor 25 is the P- port of the lithium battery protection circuit module.

[0013] The model of three-terminal voltage regulator tube one is HT7150-1, the model of three-terminal voltage regulator tube two is TL431, the model of comparator one and comparator two is GS8041-TR, the model of boost power management chip is SC8803QDER, and the model of analog front-end chip is SH367601B.

[0014] Compared with the prior art, the utility model designs a heating management circuit and a charging management circuit to avoid floating charge and low-power high-current charging, effectively avoiding the conflict between high-current charging and system power supply. The charging and discharging port is designed, and the system control board does not need to add additional interfaces, and can be compatible with products that do not require charging and heating management. The use of normal temperature batteries meets the requirements of low-temperature charging, which increases the battery life while reducing the battery cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a circuit diagram of the utility model.

[0016] Figure 2 The utility model is a circuit diagram of a linear voltage stabilizing circuit module.

[0017] Figure 3 This is a circuit diagram of the charger detection circuit module of the utility model.

[0018] Figure 4 This is a circuit diagram of the heating management circuit module of the utility model.

[0019] Figure 5 This is a circuit diagram of the charging management circuit module of the utility model.

[0020] Figure 6 This is a circuit diagram of the lithium battery protection circuit module of the utility model.

[0021] Figure 7 for Figure 6 Local amplifier circuit Figure 1 .

[0022] Figure 8 for Figure 6 Local amplifier circuit Figure 2 .

[0023] Fig. 9 for Figure 6 Local amplifier circuit Figure 3 .

[0024] Fig.10 for Figure 6 Local amplifier circuit Figure 4 . DETAILED DESCRIPTION

[0025] The utility model is now further described with reference to the accompanying drawings.

[0026] See also Figure 1 The utility model is a photovoltaic bracket battery protection circuit with charging management and heating management, including a linear voltage stabilizing circuit module, a charger detection circuit module, a heating management circuit module, a charging management circuit module, and a lithium battery protection circuit module. The P+ port of the linear voltage stabilizing circuit module 1 and the P+ port of the charger detection circuit module 2 are connected to the P+ port of the lithium battery protection circuit module 5, the P- port of the linear voltage stabilizing circuit module 1 and the P- port of the charger detection circuit module 2 are connected to the P- port of the lithium battery protection circuit module 5, the 5V port of the linear voltage stabilizing circuit module 1 is connected to the 5V port of the charger detection circuit module 2, the C+ port of the charger detection circuit module 2 is connected to the C+ port of the heating management circuit module 3 and the C+ port of the charging management circuit module 4, the C- port of the charger detection circuit module 2 is connected to the C- port of the heating management circuit module 3 and the C- port of the charging management circuit module 4, and the B+ port of the charging management circuit module 4 is connected to the B+ port of the lithium battery protection circuit module 5.

[0027] See also Figure 2The linear voltage stabilizing circuit module 1 includes a diode, a resistor, a transistor, a voltage stabilizing tube, a three-terminal voltage stabilizing tube, and a capacitor. The P+ port of the linear voltage stabilizing circuit module 1 is connected to the anode of the diode D16. The cathode of the diode D16 is connected in series with the resistor R75, and then divided into four paths, which are respectively connected to the collector of the transistor Q4, the collector of the transistor Q5, one end of the resistor R76, and one end of the resistor R77. The base of the transistor Q4 is divided into two paths, which are respectively connected to the base of the transistor Q5 and the emitter of the transistor Q6. The collector of the transistor Q6 is connected to the other end of the resistor R76. The base of the transistor Q6 is divided into two paths, which are respectively connected to the other end of the resistor R77 and the cathode of the voltage stabilizing tube D17. The base of the transistor Q4 is divided into two paths, which are respectively connected to the base of the transistor Q5 and the emitter of the transistor Q6. The collector of the transistor Q6 is connected to the other end of the resistor R76. The base of the transistor Q6 is divided into two paths, which are respectively connected to the other end of the resistor R77 and the cathode of the voltage stabilizing tube D17. The emitter of Q4 is divided into four paths and respectively connected to the emitter of transistor Q5, one end of capacitor C43, one end of capacitor C44, and pin 2 of three-terminal voltage regulator U6. Pin 3 of three-terminal voltage regulator U6 is divided into two paths and respectively connected to one end of capacitor C45 and one end of capacitor C46. Pin 3 of three-terminal voltage regulator U6 is the 5V port of linear voltage regulator circuit module 1. The anode of voltage regulator D17, the other end of capacitor C43, the other end of capacitor C44, the other end of capacitor C45, the other end of capacitor C46, ​​and pin 1 of three-terminal voltage regulator U6 are connected to the P-ground terminal. Pin 1 of three-terminal voltage regulator U6 is the P-port of linear voltage regulator circuit module 1. The model of three-terminal voltage regulator U6 is HT7150-1.

[0028] The main function of the linear voltage regulator circuit module 1 is to regulate the voltage at both ends of P+ and P- to output 5V to supply power to the charger detection circuit module 2.

[0029] Resistor 77 R77 and voltage regulator D17 form a voltage regulator circuit. Voltage regulator D17 is connected to the base of transistor 6 Q6, and the emitter is output, forming a simple transistor emitter follower. Since the voltage regulator circuit stabilizes the base voltage of transistor 6 Q6 to 15V, the emitter output voltage of transistor 6 Q6 is approximately 15V-0.7V=14.3V. Resistor 76 R76 and the collector of transistor 6 Q6 are connected in series, and the voltage is divided by resistor 76 R76 to prevent the voltage drop of transistor 6 Q6 from being too large and damaged.

[0030] Similarly, as mentioned above, the base voltage of transistor 4 Q4 and transistor 5 Q5 is 14.3V, so the emitter output voltage of transistor 4 Q4 and transistor 5 Q5 is about 14.3V-0.7V=13.6V. Diode 16 D16 and resistor 75 R75 are connected in series, and resistor 75 R75 is connected to the collector of transistor 4 Q4 and transistor 5 Q5. Diode 16 D16 and resistor 75 R75 are connected in series in the main circuit to divide the voltage, so as to avoid excessive voltage drop and damage to transistor 4 Q4 and transistor 5 Q5.

[0031] Capacitor 43 C43 and capacitor 44 C44 are connected in parallel to the output of the above-mentioned front-stage voltage stabilization circuit, and are also connected in parallel to the input of the three-terminal voltage stabilization tube U6, to play a filtering role. This prevents the front-stage voltage stabilization circuit output from being unstable when the voltage at the input end of the linear voltage stabilization circuit module 1 suddenly changes, causing the function or performance of the three-terminal voltage stabilization tube U6 to fail. The rear-stage voltage stabilization circuit converts 13.6V into a stable 5V through the three-terminal voltage stabilization tube U6, and then filters through capacitor 45 C45 and capacitor 46 C46, ​​and outputs a stable 5V voltage to power the charger detection circuit module 2.

[0032] See also Figure 3 The charger detection circuit module 2 includes a resistor, a comparator, a capacitor, a triode, a MOS tube, and an electrolytic capacitor. The P+ port of the charger detection circuit module 2 is divided into three paths and respectively connected to one end of the resistor 18 R18, one end of the resistor 12 R12, and the source of the MOS tube 2 M2. The other end of the resistor 18 R18 is divided into two paths and respectively connected to one end of the resistor 21 R21 and one end of the resistor 19 R19. The other end of the resistor 21 R21 is connected to one end of the resistor 17 R17, and the other end of the resistor 19 R19 is connected to one end of the resistor 17 R17. The 5V port of the charger detection circuit module 2 is connected to the in-phase input terminal of the comparator U3, the 5V port of the charger detection circuit module 2 is divided into three paths and respectively connected to one end of the resistor R73, one end of the capacitor C10, and the positive power supply terminal of the comparator U3, the other end of the resistor R73 is divided into two paths and respectively connected to one end of the resistor R74 and one end of the resistor R20, the other end of the resistor R20 is connected to the inverting input terminal of the comparator U3, the output terminal of the comparator U3 is connected in series with the resistor R14, and then divided into two paths and respectively connected to the resistor R6 One end of R68 is connected to the base of transistor Q2. The collector of transistor Q2 is divided into two paths and respectively connected to the other end of resistor R12 and the gate of MOS tube M2. The drain of MOS tube M2 is divided into five paths and respectively connected to the positive electrode of electrolytic capacitor EC3, the positive electrode of electrolytic capacitor EC4, one end of capacitor C6, one end of capacitor C7 and one end of capacitor C8. The drain of MOS tube M2 is the C+ port of charger detection circuit module 2. The other end of resistor R17 and resistor C7 are connected to the positive electrode of electrolytic capacitor EC3, the positive electrode of electrolytic capacitor EC4, one end of capacitor C6, one end of capacitor C7 and one end of capacitor C8. The other end of the fourteenth resistor R74, the negative power supply end of the comparator U3, the other end of the sixty-eight resistor R68, the emitter of the transistor Q2, the negative electrode of the electrolytic capacitor EC3, the negative electrode of the electrolytic capacitor EC4, the other end of the capacitor C6, the other end of the capacitor C7, the other end of the capacitor C8, and the other end of the capacitor C10 are connected to the P-ground terminal, the other end of the resistor R17 is the P-port of the charger detection circuit module 2, and the other end of the capacitor C8 is the C-port of the charger detection circuit module 2. The model of the comparator U3 is GS8041-TR.

[0033] The main function of the charger detection circuit module 2 is to detect the voltage at both ends of P+ and P-, and identify whether a charger is connected. If a charger is connected, the MOS tube 2 M2 is turned on to supply power to the heating management circuit module 3 and the charging management circuit module 4; if the charger is not connected, the MOS tube 2 M2 is turned off, and the heating management circuit module 3 and the charging management circuit module 4 are not supplied with power.

[0034] Comparator 1 U3 is powered by 5V output by linear voltage regulator circuit module 1 after filtering by capacitor 10 C10. At the same time, resistor 73 R73 and resistor 74 R74 are connected in series to divide the voltage by 5V, and then resistor 20 R20 is used to limit the current to provide a 2.5V reference voltage output to the inverting input terminal of comparator 1 U3.

[0035] Resistor 18 R18, resistor 21 R21, and resistor 17 R17 are connected in series and then connected in parallel to the P+ port and the P- port. By changing the resistance values ​​of resistor 18 R18, resistor 21 R21, and resistor 17 R17, the lowest judgment voltage of the charger detection can be set to judge whether the P+ port and the P- port are connected to the charger. By changing the voltage division of resistor 18 R18, resistor 21 R21, and resistor 17 R17, the voltage is input to the non-inverting input terminal of the comparator 1 U3 through the current limiting of resistor 19 R19. The comparator 1 U3 compares the non-inverting input terminal voltage V+ and the inverting input terminal voltage V-. If V+≥V-, it is determined that the charger is connected, and the output terminal of the comparator 1 U3 outputs 5V; otherwise, it is determined that the charger is not connected, and the output terminal of the comparator 1 U3 outputs 0V.

[0036] Resistor 14 R14, resistor 68 R68, resistor 12 R12 and transistor 2 Q2 form a driving circuit of MOS transistor 2 M2. When the output end of comparator 1 U3 outputs 5V, resistor 14 R14 and resistor 68 R68 divide the voltage to drive NPN transistor 2 Q2 to turn on, the collector of transistor 2 Q2 and the gate of MOS transistor 2 M2 are low level, VGS of MOS transistor 2 M2 is less than -20V, and MOS transistor 2 M2 is turned on. On the contrary, when the output end of comparator 1 U3 outputs 0V, NPN transistor 2 Q2 is not turned on, the collector of transistor 2 Q2 and the gate of MOS transistor 2 M2 are high level, VGS of MOS transistor 2 M2 is about 0V, and MOS transistor 2 M2 is not turned on.

[0037] Electrolytic capacitor three EC3, electrolytic capacitor four EC4, capacitor six C6, capacitor seven C7, and capacitor eight C8 are connected in parallel to the output of the charger detection circuit module 2 to play a filtering and energy storage role, protecting the charging management circuit module 4 and the heating management circuit module 3.

[0038] See also Figure 4The heating management circuit module 3 includes a resistor, a comparator, a capacitor, a triode, a MOS tube, a temperature switch, a heating plate, a thermistor, and a three-terminal voltage regulator tube. The C+ port of the heating management circuit module 3 is divided into four paths, which are respectively connected to one end of the resistor R1, one end of the resistor R2, the source of the MOS tube M1, and the source of the MOS tube M9. The other end of the resistor R1 is divided into six paths, which are respectively connected to one end of the resistor R4, one end of the resistor R5, one end of the resistor R6, the No. 2 pin of the three-terminal voltage regulator tube U1, the positive power supply end of the comparator U2, and one end of the capacitor C1. The other end of the resistor R4 is divided into two paths, which are respectively connected to one end of the resistor R7 and the No. 1 pin of the three-terminal voltage regulator tube U1. The other end of the resistor R5 is connected in series with the resistor R8, and then divided into two paths, which are respectively connected to one end of the thermistor NTC1 and the non-inverting input end of the comparator U2. The other end of the resistor R6 is divided into two paths, which are respectively connected to one end of the resistor R9 , the inverting input end of the comparator U2 is connected, after the output end of the comparator U2 is connected in series with the resistor R3, it is divided into two paths and respectively connected to one end of the resistor R69 and the base of the transistor Q1, the collector of the transistor Q1 is divided into three paths and respectively connected to the other end of the resistor R2, the gate of the MOS tube M1, and the gate of the MOS tube M9, the drain of the MOS tube M1 is divided into two paths and respectively connected to the drain of the MOS tube M9, one end of the temperature switch F2, the other end of the temperature switch F2 is connected to one end of the heating plate, the other end of the resistor R7 is divided into eight paths and connected to the No. 3 pin of the three-terminal voltage regulator tube U1, the other end of the thermistor NTC1, the other end of the resistor R9, the negative power supply end of the comparator U2, the other end of the resistor R69, the emitter of the transistor Q1, the other end of the heating plate, and the other end of the capacitor C1, and the other end of the resistor R7 is the C- port of the heating management circuit module 3. The model of the three-terminal voltage regulator U1 is TL431, and the model of the comparator U2 is GS8041-TR.

[0039] The main function of the heating management circuit module 3 is to start working and detect the battery temperature after the charger detection circuit module 2 detects that the charger is connected. In a low temperature environment, such as when the battery temperature is lower than 10°C, the battery starts to heat until the battery temperature reaches a specified temperature, such as 10°C, and then stops heating to ensure charging safety in a low temperature environment. The heating management circuit module 3 is connected in series with the temperature switch 2 F2. If other parts of the thermal management circuit module 3 fail due to a short circuit, such as the battery temperature ≥ the set temperature upper limit of the temperature switch 2 F2, such as 30°C, the temperature switch 2 F2 is disconnected. Afterwards, if the battery temperature ≤ the set temperature lower limit of the temperature switch 2 F2, such as 20°C, the temperature switch 2 F2 is turned on again.

[0040] After the charger detection circuit module 2 detects that the charger is connected, the resistor R1, the resistor R4, the resistor R7 and the three-terminal voltage regulator U1 form a voltage regulator circuit. The output voltage of the three-terminal voltage regulator U1 = 2.5V × R4 + R5 / R5 = 5V. The main function is to output 5V to the peripheral comparator U2 and the peripheral circuit; the resistor R1 is used as a current limiting resistor to limit the input current of the three-terminal voltage regulator U1.

[0041] After the front voltage regulator circuit outputs 5V, it is filtered by capacitor C1 to power comparator U2, and at the same time, it is divided in series by resistor R6 and resistor R9, and the output is 2.5V connected to the inverting input of comparator U2; in addition, resistor R5, resistor R8 and thermistor NTC1 are divided in series, and the output is connected to the non-inverting input of comparator U2. Comparator U2 compares the non-inverting input voltage V+ and the inverting input voltage V-. If V+≥V-, it is determined that the battery temperature is lower than 10℃, and the output of comparator U2 outputs 5V; otherwise, the charger is not connected, and the output of comparator U2 outputs 0V.

[0042] Resistor 3 R3, resistor 69 R69, resistor 2 R2 and transistor 1 Q1 form the driving circuit of MOS tube 1 M1 and MOS tube 9 M9. MOS tube 1 M1 and MOS tube 9 M9 are selected according to the heating current. If the current is small, the MOS tube 1 M1 with a small package is selected, otherwise the MOS tube 9 M9 is selected. The output end of comparator 2 U2 outputs 5V, and resistor 3 R3 and resistor 69 R69 divide the voltage to drive NPN transistor 1 Q1 to turn on. The collector of transistor 1 Q1 and the gate of MOS tube 1 M1 and MOS tube 9 M9 are low level. The VGS of MOS tube 1 M1 and MOS tube 9 M9 is less than -20V, and MOS tube 1 M1 and MOS tube 9 M9 are turned on. On the contrary, when the output end of the comparator U2 outputs 0V, the NPN transistor Q1 is not conducting, the collector of the transistor Q1 and the gates of the MOS tube M1 and the MOS tube M9 are high level, the VGS of the MOS tube M1 and the MOS tube M9 is ≈ 0V, and the MOS tube M1 and the MOS tube M9 are not conducting.

[0043] After MOS tube 1 M1 and MOS tube 9 M9 are turned on, the heating plate is powered through temperature switch 2 F2. When the battery temperature is less than 30°C, temperature switch 2 F2 is normally closed and turned on, and the heating plate is heated normally. If the output line is abnormal, MOS tube 1 M1 and MOS tube 9 M9 control failure is normally closed. When the battery temperature is ≥30°C, temperature switch 2 F2 is disconnected and not turned on, and the heating plate stops heating until the battery temperature is ≤20°C, and temperature switch 2 F2 resumes conduction.

[0044] See also Figure 5The charging management circuit module 4 includes a resistor, a capacitor, an inductor, a boost power management chip, a diode, and an electrolytic capacitor. The C+ port of the charging management circuit module 4 is divided into six paths and respectively connected to one end of resistor seventy R70, one end of resistor fifteen R15, one end of resistor ten R10, one end of capacitor fourteen C14, one end of capacitor nine C9, and pin 30 of the boost power management chip U4. The other end of resistor seventy R70 is connected in series with resistor seventy-one R71, and then divided into five paths and respectively connected to one end of resistor seventy-two R72, one end of resistor twenty-three R23, VCC power supply, pin 7 and pin 3 of the boost power management chip U4. The other end of resistor twenty-three R23 is connected to pin 4 of the boost power management chip U4. The other end of the resistor R10 is divided into two paths and is respectively connected to one end of the resistor R16 and the drain of the MOS tube M3. The other end of the resistor R15 is divided into two paths and is respectively connected to one end of the capacitor C11 and the 32nd pin of the boost power management chip U4. The other end of the resistor R16 is divided into two paths and is respectively connected to the other end of the capacitor C11 and the 31st pin of the boost power management chip U4. The gate of the MOS tube M3 is connected in series with the resistor R13 and is connected to the 28th pin of the boost power management chip U4. The source of the MOS tube M3 is divided into four paths and is respectively connected to one end of the inductor L1, the drain of the MOS tube M4, one end of the capacitor C12 and the 27th pin of the boost power management chip U4. The VCC power supply is connected to the anode of the diode D2, the cathode of the diode D2 is divided into two paths and respectively connected to the other end of the capacitor C12 and the 29th pin of the boost power management chip U4, the gate of the MOS tube M4 is connected in series with the resistor R67 and then connected to the 26th pin of the boost power management chip U4, the VCC power supply is divided into two paths and respectively connected to one end of the capacitor C13 and the 24th pin of the boost power management chip U4, the other end of the inductor L1 is divided into two paths and respectively connected to one end of the resistor R11 and one end of the resistor R22, the other end of the resistor R22 is divided into two paths and respectively connected to one end of the capacitor C15 and the 18th pin of the boost power management chip U4, the capacitor C10 is connected to the MOS tube M4 and then connected to the 26th pin of the boost power management chip U4, the VCC power supply is divided into two paths and respectively connected to one end of the capacitor C13 and the 24th pin of the boost power management chip U4, the other end of the inductor L1 is divided into two paths and respectively connected to one end of the resistor R11 and one end of the resistor R22, the other end of the resistor R22 is divided into two paths and respectively connected to one end of the capacitor C15 and the 18th pin of the boost power management chip U4, the capacitor C11 is connected to the MOS tube M4 and then connected to the MOS tube M4. The other end of C15 is divided into two paths and connected to one end of resistor R24 ​​and pin 17 of boost power management chip U4 respectively. The other end of resistor R24 ​​is divided into twelve paths and connected to the other end of resistor R11, the positive electrode of electrolytic capacitor EC1, the positive electrode of electrolytic capacitor EC2, one end of capacitor C2, one end of capacitor C3, one end of capacitor C4, one end of capacitor C5, one end of capacitor C16, the anode of diode D1, one end of resistor R26, pin 19 of boost power management chip U4 and switch power supply respectively. The cathode of diode D1 is B+ port of charging management circuit module 4. After the other end of resistor R26 is connected in series with resistor R25,The boost power management chip U4 is divided into two paths and respectively connected to one end of resistor twenty-seven R27 and pin No. 16 of the boost power management chip U4. The boost power management chip U4 is connected to one end of resistor twenty-eight R28, and the boost power management chip U4 is connected to one end of resistor twenty-nine R29. The boost power management chip U4 is connected to one end of resistor thirty R30 by pin No. 10. The boost power management chip U4 is connected to one end of resistor thirty-one R31 and one end of capacitor seventeen C17 by pin No. 12. The boost power management chip U4 is connected to one end of resistor thirty-one R31 and one end of capacitor seventeen C17 by pin No. 15 of the boost power management chip U4 is connected in series with resistor thirty-two R32, and then connected to one end of capacitor eighteen C18, the other end of resistor seventy-two R72, the other end of capacitor nine C9, and the other end of capacitor fourteen C14 , the source of MOS tube M4, the other end of capacitor C13, the negative electrode of electrolytic capacitor EC1, the negative electrode of electrolytic capacitor EC2, the other end of capacitor C2, the other end of capacitor C3, the other end of capacitor C4, the other end of capacitor C5, the other end of capacitor C16, the other end of resistor R27, the other end of resistor R28, the other end of resistor R29, the other end of resistor R31, the other end of capacitor C17, the other end of capacitor C18, pin 1, pin 2, pin 11, pin 14, and pin 25 of boost power management chip U4 are connected to the C- ground terminal, and the other end of resistor R72 is the C- port of charging management circuit module 4. Boost power management chip U4 is a chip of Nanxin model SC8803QDER. ,

[0045] The main function of the charging management circuit module 4 is to start working after the charger detection circuit module 2 detects that the charger is connected. The charging management circuit module 4 first detects the charger voltage. If the charger voltage is lower than the minimum charging voltage, charging will be stopped. If the charger voltage drops from high to the minimum charging voltage, the charging current will be automatically reduced to prevent the charger from overloading and causing abnormal charging. At the same time, when the battery voltage is lower than the constant current charging voltage value, trickle charging is performed, and then constant current charging is entered. When the battery voltage reaches the constant voltage charging voltage, constant voltage charging is entered. When the charging parameters reach the full charging condition, charging is stopped to prevent floating charging.

[0046] According to the design requirements of the boost power management chip U4, resistor seventy R70, resistor seventy-one R71, and resistor seventy-two R72 are used in series to set the charging adaptive function of the boost power management chip U4; the current detection resistor eleven R11 and the differential circuit resistor twenty-two R22, resistor twenty-four R24, and capacitor fifteen C15 are used to set the constant current charging current value; resistor twenty-six R26, resistor twenty-five R25, and resistor twenty-seven R27 are used to set the constant voltage charging voltage value.

[0047] In addition, the charging management circuit and the battery are directly isolated in one direction through a diode D1 to prevent the battery from leaking reversely through the charging management circuit module 4 when not charging.

[0048] The charging management circuit module 4 can be compatible with the charging requirements of different 6 to 8-string battery packs. At the same time, the system only needs one switching power supply to meet the requirements of charging the battery and powering the bracket at the same time.

[0049] See also Figure 6~Figure 10The lithium battery protection circuit module 5 includes a resistor, a capacitor, a diode, a voltage regulator, a triode, a MOS tube, a boost power management chip, a thermistor, a fuse, an analog front-end chip, a serial port, and a connector. The P+ port of the lithium battery protection circuit module 5 is divided into five paths, which are respectively connected to the cathode of the diode three D3, the cathode of the diode four D4, the cathode of the diode five D5, the cathode of the diode nine D9, and one end of the capacitor twenty-two C22. The other end of the capacitor twenty-two C22 is connected to one end of the capacitor twenty-five C25. The anode of the diode three D3 is divided into three paths, which are respectively connected to the anode of the diode four D4, the anode of the diode five D5, and one end of the fuse F1. The anode of the diode three D3 is the B+ port of the lithium battery protection circuit module 5. The anode of the fuse F1 is The other end is divided into five paths, which are respectively connected to one end of resistor thirty-four R34, one end of resistor sixty-six R66, one end of resistor seventy-eight R7S, one end of resistor seventy-nine R6S, and serial port eight B8. The other end of resistor thirty-four R34 is divided into two paths, which are respectively connected to the anode of diode six D6 and one end of capacitor twenty-one C21. The cathode of diode six D6 is divided into two paths, which are respectively connected to one end of resistor thirty-three R33 and the cathode of voltage regulator tube two D7. The other end of resistor thirty-three R33 is divided into four paths, which are respectively connected to one end of capacitor twenty C20, one end of capacitor nineteen C19, pin 28 of analog front-end chip U5, and one end of resistor thirty-five R35. The other end of resistor thirty-five R35 is connected to the cathode of diode seven D7. The anode of diode seven D7 is connected to the cathode of diode seven D7. The other end of resistor R66 is divided into four paths and connected to one end of capacitor C42, pin 2, pin 3 and pin 4 of analog front-end chip U5 respectively. The other end of capacitor C42 is divided into three paths and connected to pin 5 of analog front-end chip U5, one end of capacitor C41 and one end of resistor R65 respectively. The other end of resistor R65 is divided into two paths and connected to the other end of resistor R78 and serial port B7 respectively. The other end of capacitor C41 is divided into three paths and connected to pin 6 of analog front-end chip U5, one end of capacitor C40 and one end of resistor R42 respectively. The other end of resistor R42 is divided into two paths and connected to resistor R79 respectively. The other end of R6S is connected to serial port six B6, the other end of capacitor forty C40 is divided into three paths and respectively connected to pin No. 7 of analog front-end chip U5, one end of capacitor twenty-six C26, and one end of resistor forty-five R45, the other end of resistor forty-five R45 is connected to serial port five B5, the other end of capacitor twenty-six C26 is divided into three paths and respectively connected to pin No. 8 of analog front-end chip U5, one end of capacitor thirty C30, and one end of resistor forty-nine R49, the other end of resistor forty-nine R49 is connected to serial port four B4, the other end of capacitor thirty C30 is divided into three paths and respectively connected to pin No. 9 of analog front-end chip U5, one end of capacitor thirty-one C31, and one end of resistor fifty R50, the other end of resistor fifty R50 is connected to serial port three B3,The other end of capacitor 31 C31 is divided into three paths and respectively connected to pin 10 of analog front-end chip U5, one end of capacitor 33 C33, and one end of resistor 51 R51. The other end of resistor 51 R51 is connected to serial port 2 B2. The other end of capacitor 33 C33 is divided into four paths and respectively connected to pin 11 of analog front-end chip U5, one end of capacitor 36 C36, one end of resistor 54 R54, and the cathode of diode 14 D14. The other end of resistor 54 R54 is connected to serial port 1 B1. The other end of capacitor 36 C36 is divided into four paths and respectively connected to pin 12 of analog front-end chip U5, one end of capacitor 37 C37, one end of resistor 56 R56, and the cathode of diode 15 D15. The other end of fifty-six R56 is connected to one end of resistor sixty R60, the 26th pin of the analog front-end chip U5 is connected in series with resistor thirty-eight R38, and then connected to the anode of diode ten D10, the 25th pin of the analog front-end chip U5 is connected to one end of resistor thirty-nine R39, the other end of resistor thirty-nine R39 is divided into four paths and respectively connected to the drain of MOS tube six M6, the drain of MOS tube seven M7, the drain of MOS tube five M5, and the drain of MOS tube eight M8, the 24th pin of the analog front-end chip U5 is connected in series with resistor forty R40, and then divided into two paths and respectively connected to the emitter of transistor three Q3 and one end of resistor forty-four R44, the base of transistor three Q3 is divided into two paths and respectively connected to the other end of resistor forty-four R44 and resistor forty-six One end of R46 is connected, the collector of transistor three Q3 is connected to the anode of diode eleven D11, the cathode of diode eleven D11 is divided into four paths and respectively connected to the cathode of voltage regulator tube three D12, one end of resistor fifty-eight R58, one end of resistor sixty-three R63, and one end of resistor sixty-four R64, the other end of resistor sixty-three R63 is connected to the gate of MOS tube six M6, the other end of resistor sixty-four R64 is connected to the gate of MOS tube seven M7, after pin 23 of analog front-end chip U5 is connected in series with resistor forty-one R41, it is divided into four paths and respectively connected to one end of resistor fifty-five R55, one end of resistor fifty-seven R57, one end of resistor fifty-nine R59, and the cathode of voltage regulator tube four D13, the other end of resistor fifty-five R55 is connected to The gate of MOS tube five M5 is connected, the other end of resistor fifty-seven R57 is connected to the gate of MOS tube eight M8, pin 22 of analog front-end chip U5 is connected to one end of resistor forty-three R43, pin 21 of analog front-end chip U5 is divided into three paths and respectively connected to the other end of resistor forty-three R43, one end of capacitor twenty-three C23, and 5V power supply, pin 20 of analog front-end chip U5 is connected in series with resistor thirty-six R36, and then connected to pin 2 of connector J1, pin 19 of analog front-end chip U5 is connected in series with resistor thirty-seven R37, and then connected to pin 3 of connector J1, pin 18 of analog front-end chip U5 is divided into two paths and respectively connected to one end of resistor forty-seven R47 and one end of capacitor twenty-seven C27,The 17th pin of the analog front-end chip U5 is divided into two paths and connected to one end of the resistor 48 R48 and one end of the capacitor 28 C28 respectively. The 16th pin of the analog front-end chip U5 is divided into two paths and connected to one end of the thermistor 2 NTC2 and one end of the capacitor 29 C29 respectively. The 15th pin of the analog front-end chip U5 is divided into three paths and connected to one end of the resistor 52 R52, one end of the capacitor 32 C32 and one end of the capacitor 34 C34 respectively. The other end of the resistor 52 R52 is divided into eight paths and connected to the other end of the resistor 59 R59 and the anode of the voltage regulator tube 4 D13 respectively. The electrode, the source of MOS tube M5, the source of MOS tube M8, one end of resistor R61, one end of resistor R62, one end of capacitor C39, and the CRS end are connected. The other end of capacitor C39 is connected to one end of capacitor C38. Pin 14 of analog front-end chip U5 is divided into three paths and is respectively connected to one end of resistor R53, the other end of capacitor C32, one end of capacitor C35, the other end of capacitor C21, the anode of voltage regulator tube D7, the other end of capacitor C20, and capacitor C19. The other end of C19, the anode of diode 14 D14, the anode of diode 15 D15, the other end of capacitor 37 C37, the other end of resistor 60 R60, the other end of resistor 46 R46, pin 13 of analog front-end chip U5, the other end of capacitor 23 C23, the other end of resistor 47 R47, the other end of capacitor 27 C27, the other end of resistor 48 R48, the other end of capacitor 28 C28, the other end of thermistor 2 NTC2, the other end of capacitor 29 C29, the other end of capacitor 34 C34, capacitor 3 The other end of C35, the other end of resistor R53, the other end of resistor R61, the other end of resistor R62, and pin 4 of connector J1 are grounded, the other end of capacitor C25, the anode of diode D9, the cathode of diode D10, the anode of voltage regulator D12, the other end of resistor R58, the source of MOS tube M6, the source of MOS tube M7, and the other end of capacitor C38 are connected to the P-ground terminal, and the other end of capacitor C25 is the P-port of lithium battery protection circuit module 5.

[0050] The analog front-end chip U5 is a chip of SinoWise model SH367601B. This chip includes functions such as overcharge, overdischarge, overcurrent, short circuit, temperature protection, and 0V charging prohibition.

[0051] The lithium battery protection circuit module 5 can be selected as 6, 7 or 8 series according to customer needs. In addition, a programming port is reserved, and protection parameters can be customized according to user needs to provide compatibility. At the same time, the B+ and P+ ends of the battery are discharged in parallel through diode three D3, diode four D4 and diode five D5. The unidirectional conduction characteristics of the diode can prevent the charger from charging the battery through the discharge circuit.

[0052] When the battery of the utility model is used, the control panel design of the bracket does not need to do temperature management, and the battery can complete the charge and discharge management independently.

[0053] The utility model does not need to upgrade the system motherboard for users who charge and discharge with the same port. For users who charge and discharge with separate ports and need to manage heating separately, the number of switch power supplies and wiring harnesses used is reduced, the versatility of materials is increased, the system is simpler and safer.

[0054] The utility model designs a heating management circuit and a charging management circuit to avoid floating charge and low-power high-current charging, effectively avoiding the conflict between high-current charging and system power supply. The charging and discharging port is designed, and the system control board does not need to add additional interfaces, and can be compatible with products that do not require charging and heating management. The use of normal temperature batteries meets the requirements of low-temperature charging, which increases the battery life while reducing the battery cost.

Claims

1. A photovoltaic bracket battery protection circuit with charging management and heating management, including a linear voltage regulator circuit module, a charger detection circuit module, a heating management circuit module, a charging management circuit module, and a lithium battery protection circuit module, characterized in that: The P+ port of the linear voltage stabilizing circuit module (1) and the P+ port of the charger detection circuit module (2) are connected to the P+ port of the lithium battery protection circuit module (5); the P- port of the linear voltage stabilizing circuit module (1) and the P- port of the charger detection circuit module (2) are connected to the P- port of the lithium battery protection circuit module (5); the 5V port of the linear voltage stabilizing circuit module (1) is connected to the 5V port of the charger detection circuit module (2); the C+ port of the charger detection circuit module (2) is connected to the C+ port of the heating management circuit module (3) and the C+ port of the charging management circuit module (4); the C- port of the charger detection circuit module (2) is connected to the C- port of the heating management circuit module (3) and the C- port of the charging management circuit module (4); and the B+ port of the charging management circuit module (4) is connected to the B+ port of the lithium battery protection circuit module (5).

2. A photovoltaic bracket battery protection circuit with charging management and heating management according to claim 1, characterized in that: The linear voltage stabilizing circuit module (1) comprises a diode, a resistor, a transistor, a voltage stabilizing tube, a three-terminal voltage stabilizing tube, and a capacitor. The P+ port of the linear voltage stabilizing circuit module (1) is connected to the anode of diode sixteen (D16). The cathode of diode sixteen (D16) is connected in series with resistor seventy-five (R75), and then is divided into four paths, which are respectively connected to the collector of transistor four (Q4), the collector of transistor five (Q5), one end of resistor seventy-six (R76), and one end of resistor seventy-seven (R77). The base of transistor four (Q4) is divided into two paths, which are respectively connected to the base of transistor five (Q5) and the emitter of transistor six (Q6). The collector of transistor six (Q6) is connected to the other end of resistor seventy-six (R76). The base of transistor six (Q6) is divided into two paths, which are respectively connected to the other end of resistor seventy-seven (R77) and the cathode of voltage stabilizing tube one (D17). The emitter of (Q4) is divided into four paths and respectively connected to the emitter of transistor five (Q5), one end of capacitor forty-three (C43), one end of capacitor forty-four (C44), and pin 2 of three-terminal voltage regulator one (U6). Pin 3 of three-terminal voltage regulator one (U6) is divided into two paths and respectively connected to one end of capacitor forty-five (C45) and one end of capacitor forty-six (C46). Pin 3 of three-terminal voltage regulator one (U6) is the 5V port of the linear voltage regulator circuit module (1). The anode of voltage regulator one (D17), the other end of capacitor forty-three (C43), the other end of capacitor forty-four (C44), the other end of capacitor forty-five (C45), the other end of capacitor forty-six (C46), and pin 1 of three-terminal voltage regulator one (U6) are connected to the P- ground terminal. Pin 1 of three-terminal voltage regulator one (U6) is the P- port of the linear voltage regulator circuit module (1).

3. A photovoltaic support battery protection circuit with charging management and heating management according to claim 1, characterized in that: The charger detection circuit module (2) comprises a resistor, a comparator, a capacitor, a triode, a MOS tube, and an electrolytic capacitor. The P+ port of the charger detection circuit module (2) is divided into three paths and respectively connected to one end of resistor 18 (R18), one end of resistor 12 (R12), and the source of MOS tube 2 (M2). The other end of resistor 18 (R18) is divided into two paths and respectively connected to one end of resistor 21 (R21) and one end of resistor 19 (R19). The other end of resistor 21 (R21) is connected to one end of resistor 17 (R17). The other end of resistor 19 (R19) is connected to the comparator. The 5V port of the charger detection circuit module (2) is connected to the same phase input terminal of the comparator 1 (U3), the 5V port of the charger detection circuit module (2) is divided into three paths and respectively connected to one end of the resistor 73 (R73), one end of the capacitor 10 (C10), and the positive power supply terminal of the comparator 1 (U3), the other end of the resistor 73 (R73) is divided into two paths and respectively connected to one end of the resistor 74 (R74) and one end of the resistor 20 (R20), the other end of the resistor 20 (R20) is connected to the inverting input terminal of the comparator 1 (U3), the output terminal of the comparator 1 (U3) is connected in series with the resistor 14 (R14), and then divided into two paths and respectively connected to the resistor 68 (R 68), one end of transistor 2 (Q2) is connected, the collector of transistor 2 (Q2) is divided into two paths and respectively connected to the other end of resistor 12 (R12) and the gate of MOS tube 2 (M2), the drain of MOS tube 2 (M2) is divided into five paths and respectively connected to the positive electrode of electrolytic capacitor 3 (EC3), the positive electrode of electrolytic capacitor 4 (EC4), one end of capacitor 6 (C6), one end of capacitor 7 (C7), and one end of capacitor 8 (C8), the drain of MOS tube 2 (M2) is the C+ port of the charger detection circuit module (2), the other end of resistor 17 (R17), resistor 74 The other end of resistor 68 (R74), the negative power supply end of comparator 1 (U3), the other end of resistor 68 (R68), the emitter of transistor 2 (Q2), the negative electrode of electrolytic capacitor 3 (EC3), the negative electrode of electrolytic capacitor 4 (EC4), the other end of capacitor 6 (C6), the other end of capacitor 7 (C7), the other end of capacitor 8 (C8), and the other end of capacitor 10 (C10) are connected to the P-ground terminal, the other end of resistor 17 (R17) is the P-port of the charger detection circuit module (2), and the other end of capacitor 8 (C8) is the C-port of the charger detection circuit module (2).

4. A photovoltaic support battery protection circuit with charging management and heating management according to claim 1, characterized in that: The heating management circuit module (3) comprises a resistor, a comparator, a capacitor, a triode, a MOS tube, a temperature switch, a heating plate, a thermistor, and a three-terminal voltage regulator. The C+ port of the heating management circuit module (3) is divided into four paths and respectively connected to one end of resistor one (R1), one end of resistor two (R2), the source of MOS tube one (M1), and the source of MOS tube nine (M9). The other end of resistor one (R1) is divided into six paths and respectively connected to one end of resistor four (R4), one end of resistor five (R5), and one end of resistor six (R6). , the No. 2 pin of the three-terminal voltage regulator tube 2 (U1), the positive power supply terminal of the comparator 2 (U2), and one end of the capacitor 1 (C1) are connected. The other end of the resistor 4 (R4) is divided into two paths and connected to one end of the resistor 7 (R7) and the No. 1 pin of the three-terminal voltage regulator tube 2 (U1). The other end of the resistor 5 (R5) is connected in series with the resistor 8 (R8) and then divided into two paths and connected to one end of the thermistor 1 (NTC1) and the non-inverting input terminal of the comparator 2 (U2). The other end of the resistor 6 (R6) is divided into two paths and connected to one end of the resistor 9 (R9). , the inverting input terminal of comparator 2 (U2), the output terminal of comparator 2 (U2) is connected in series with resistor 3 (R3), and then divided into two paths respectively connected to one end of resistor 69 (R69) and the base of transistor 1 (Q1), the collector of transistor 1 (Q1) is divided into three paths respectively connected to the other end of resistor 2 (R2), the gate of MOS tube 1 (M1), and the gate of MOS tube 9 (M9), the drain of MOS tube 1 (M1) is divided into two paths respectively connected to the drain of MOS tube 9 (M9), one end of temperature switch 2 (F2), and the drain of MOS tube 1 (M1) is divided into two paths respectively connected to the drain of MOS tube 9 (M9), one end of temperature switch 2 (F2), and the drain of MOS tube 1 (M1). The other end of the temperature switch 2 (F2) is connected to one end of the heating plate, the other end of the resistor 7 (R7) is divided into eight paths and connected to the No. 3 pin of the three-terminal voltage regulator tube 2 (U1), the other end of the thermistor 1 (NTC1), the other end of the resistor 9 (R9), the negative power supply end of the comparator 2 (U2), the other end of the resistor 69 (R69), the emitter of the transistor 1 (Q1), the other end of the heating plate, and the other end of the capacitor 1 (C1), and the other end of the resistor 7 (R7) is the C-port of the heating management circuit module (3).

5. A photovoltaic support battery protection circuit with charging management and heating management according to claim 1, characterized in that: The charging management circuit module (4) comprises a resistor, a capacitor, an inductor, a boost power management chip, a diode, and an electrolytic capacitor. The C+ port of the charging management circuit module (4) is divided into six paths, which are respectively connected to one end of resistor seventy (R70), one end of resistor fifteen (R15), one end of resistor ten (R10), one end of capacitor fourteen (C14), one end of capacitor nine (C9), and pin 30 of the boost power management chip (U4). After the other end of resistor seventy (R70) is connected in series with resistor seventy-one (R71), it is divided into five paths, which are respectively connected to one end of resistor seventy-two (R72), one end of resistor twenty-three (R23), VCC power supply, boost The No. 7 pin and No. 3 pin of the power management chip (U4) are connected, the other end of the resistor 23 (R23) is connected to the No. 4 pin of the boost power management chip (U4), the other end of the resistor 10 (R10) is divided into two paths and respectively connected to one end of the resistor 16 (R16) and the drain of the MOS tube 3 (M3), the other end of the resistor 15 (R15) is divided into two paths and respectively connected to one end of the capacitor 11 (C11) and the No. 32 pin of the boost power management chip (U4), the other end of the resistor 16 (R16) is divided into two paths and respectively connected to the other end of the capacitor 11 (C11) and the No. 31 pin of the boost power management chip (U4), the MOS tube 3 (M 3) is connected to the gate of the boost power management chip (U4) through resistor 13 (R13) in series, and then connected to pin 28 of the boost power management chip (U4). The source of MOS tube 3 (M3) is divided into four paths, which are respectively connected to one end of inductor 1 (L1), the drain of MOS tube 4 (M4), one end of capacitor 12 (C12), and pin 27 of the boost power management chip (U4). The VCC power supply is connected to the anode of diode 2 (D2). The cathode of diode 2 (D2) is divided into two paths, which are respectively connected to the other end of capacitor 12 (C12) and pin 29 of the boost power management chip (U4). The gate of MOS tube 4 (M4) is connected to resistor 67 (R67) in series, and then connected to the boost power management chip (U4). The power management chip (U4) is connected to pin 26, the VCC power supply is divided into two paths, which are respectively connected to one end of capacitor 13 (C13) and pin 24 of the boost power management chip (U4), the other end of inductor 1 (L1) is divided into two paths, which are respectively connected to one end of resistor 11 (R11) and one end of resistor 22 (R22), the other end of resistor 22 (R22) is divided into two paths, which are respectively connected to one end of capacitor 15 (C15) and pin 18 of the boost power management chip (U4), the other end of capacitor 15 (C15) is divided into two paths, which are respectively connected to one end of resistor 24 (R24) and pin 17 of the boost power management chip (U4),The other end of resistor twenty-four (R24) is divided into twelve paths and respectively connected to the other end of resistor eleven (R11), the positive electrode of electrolytic capacitor one (EC1), the positive electrode of electrolytic capacitor two (EC2), one end of capacitor two (C2), one end of capacitor three (C3), one end of capacitor four (C4), one end of capacitor five (C5), one end of capacitor sixteen (C16), the anode of diode one (D1), one end of resistor twenty-six (R26), pin 19 of boost power management chip (U4), and switch power supply. The cathode of diode one (D1) is the B+ port of charging management circuit module (4). The other end of resistor twenty-six (R26) is connected in series with resistor twenty-five (R25), and then divided into two paths to be connected to one end of resistor twenty-seven (R27) and pin 16 of the boost power management chip (U4), pin 8 of the boost power management chip (U4) is connected to one end of resistor twenty-eight (R28), pin 9 of the boost power management chip (U4) is connected to one end of resistor twenty-nine (R29), pin 10 of the boost power management chip (U4) is connected to one end of resistor thirty (R30), and pin 12 of the boost power management chip (U4) is divided into two paths to be connected to resistor thirty One end of resistor 1 (R31) and one end of capacitor 17 (C17) are connected, and the No. 15 pin of the boost power management chip (U4) is connected in series with resistor 32 (R32), and then connected to one end of capacitor 18 (C18), the other end of resistor 72 (R72), the other end of capacitor 9 (C9), the other end of capacitor 14 (C14), the source of MOS tube 4 (M4), the other end of capacitor 13 (C13), the negative electrode of electrolytic capacitor 1 (EC1), the negative electrode of electrolytic capacitor 2 (EC2), the other end of capacitor 2 (C2), the other end of capacitor 3 (C3), capacitor 4 (C4) The other end of the capacitor five (C5), the other end of the capacitor sixteen (C16), the other end of the resistor twenty-seven (R27), the other end of the resistor twenty-eight (R28), the other end of the resistor twenty-nine (R29), the other end of the resistor thirty-one (R31), the other end of the capacitor seventeen (C17), the other end of the capacitor eighteen (C18), the No. 1 pin, the No. 2 pin, the No. 11 pin, the No. 14 pin, and the No. 25 pin of the boost power management chip (U4) are connected to the C- ground terminal, and the other end of the resistor seventy-two (R72) is the C- port of the charging management circuit module (4).

6. A photovoltaic support battery protection circuit with charging management and heating management according to claim 1, characterized in that: The lithium battery protection circuit module (5) comprises a resistor, a capacitor, a diode, a voltage regulator, a triode, a MOS tube, a boost power management chip, a thermistor, a fuse, an analog front-end chip, a serial port, and a connector. The P+ port of the lithium battery protection circuit module (5) is divided into five paths and respectively connected to the cathode of diode three (D3), the cathode of diode four (D4), the cathode of diode five (D5), the cathode of diode nine (D9), and one end of capacitor twenty-two (C22). The other end of capacitor twenty-two (C22) is connected to one end of capacitor twenty-five (C25). The anode of diode three (D3) is divided into three paths and respectively connected to the anode of diode four (D4), the anode of diode five (D5), and the anode of fuse (F1). One end is connected, the anode of diode three (D3) is the B+ port of the lithium battery protection circuit module (5), the other end of the fuse (F1) is divided into five paths and respectively connected to one end of resistor thirty-four (R34), one end of resistor sixty-six (R66), one end of resistor seventy-eight (R7S), one end of resistor seventy-nine (R6S), and serial port eight (B8), the other end of resistor thirty-four (R34) is divided into two paths and respectively connected to the anode of diode six (D6) and one end of capacitor twenty-one (C21), the cathode of diode six (D6) is divided into two paths and respectively connected to one end of resistor thirty-three (R33) and the cathode of voltage regulator tube two (D7), the other end of resistor thirty-three (R33) is divided into four paths and respectively connected to capacitor twenty (C20) One end of the capacitor (C19), one end of the capacitor 19 (C19), pin 28 of the analog front-end chip (U5), and one end of the resistor 35 (R35) are connected. The other end of the resistor 35 (R35) is connected to the cathode of the diode 7 (D7). The anode of the diode 7 (D7) is connected to pin 1 of the connector (J1). The other end of the resistor 66 (R66) is divided into four paths and connected to one end of the capacitor 42 (C42), pin 2, pin 3, and pin 4 of the analog front-end chip (U5). The other end of the capacitor 42 (C42) is divided into three paths and connected to pin 5 of the analog front-end chip (U5), one end of the capacitor 41 (C41), and one end of the resistor 65 (R65). The other end of (R65) is divided into two paths and connected to the other end of resistor seventy-eight (R7S) and serial port seven (B7) respectively. The other end of capacitor forty-one (C41) is divided into three paths and connected to pin 6 of analog front-end chip (U5), one end of capacitor forty (C40), and one end of resistor forty-two (R42) respectively. The other end of resistor forty-two (R42) is divided into two paths and connected to the other end of resistor seventy-nine (R6S) and serial port six (B6) respectively. The other end of capacitor forty (C40) is divided into three paths and connected to pin 7 of analog front-end chip (U5), one end of capacitor twenty-six (C26), and one end of resistor forty-five (R45) respectively. The other end of resistor forty-five (R45) is connected to serial port five (B5).The other end of capacitor twenty-six (C26) is divided into three paths and connected to pin 8 of the analog front-end chip (U5), one end of capacitor thirty (C30), and one end of resistor forty-nine (R49). The other end of resistor forty-nine (R49) is connected to serial port four (B4). The other end of capacitor thirty (C30) is divided into three paths and connected to pin 9 of the analog front-end chip (U5), one end of capacitor thirty-one (C31), and one end of resistor fifty (R50). The other end of resistor fifty (R50) is connected to serial port three (B3). The other end of capacitor thirty-one (C31) is divided into three paths and connected to pin 10 of the analog front-end chip (U5), one end of capacitor thirty-three (C33), and one end of resistor fifty-one (R50). The other end of the resistor 51 (R51) is connected to the serial port 2 (B2), the other end of the capacitor 33 (C33) is divided into four paths and respectively connected to the No. 11 pin of the analog front-end chip (U5), one end of the capacitor 36 (C36), one end of the resistor 54 (R54), and the cathode of the diode 14 (D14), the other end of the resistor 54 (R54) is connected to the serial port 1 (B1), the other end of the capacitor 36 (C36) is divided into four paths and respectively connected to the No. 12 pin of the analog front-end chip (U5), one end of the capacitor 37 (C37), one end of the resistor 56 (R56), and the cathode of the diode 15 (D15), the other end of the resistor 56 (R56) is connected to the The 26th pin of the analog front-end chip (U5) is connected to one end of resistor sixty (R60), the 25th pin of the analog front-end chip (U5) is connected to one end of resistor thirty-eight (R38) in series, and then connected to the anode of diode ten (D10). The 25th pin of the analog front-end chip (U5) is connected to one end of resistor thirty-nine (R39), and the other end of resistor thirty-nine (R39) is divided into four paths and respectively connected to the drain of MOS tube six (M6), the drain of MOS tube seven (M7), the drain of MOS tube five (M5), and the drain of MOS tube eight (M8). The 24th pin of the analog front-end chip (U5) is connected to resistor forty (R40) in series, and then divided into two paths and respectively connected to the emitter of transistor three (Q3) and one end of resistor forty-four (R44). 3)'s base is divided into two paths and respectively connected to the other end of resistor 44 (R44) and one end of resistor 46 (R46), the collector of transistor 3 (Q3) is connected to the anode of diode 11 (D11), the cathode of diode 11 (D11) is divided into four paths and respectively connected to the cathode of voltage regulator tube 3 (D12), one end of resistor 58 (R58), one end of resistor 63 (R63), and one end of resistor 64 (R64), the other end of resistor 63 (R63) is connected to the gate of MOS tube 6 (M6), the other end of resistor 64 (R64) is connected to the gate of MOS tube 7 (M7), after the 23rd pin of the analog front-end chip (U5) is connected in series with resistor 41 (R41),The four paths are connected to one end of resistor 55 (R55), one end of resistor 57 (R57), one end of resistor 59 (R59), and the cathode of voltage regulator tube 4 (D13), the other end of resistor 55 (R55) is connected to the gate of MOS tube 5 (M5), the other end of resistor 57 (R57) is connected to the gate of MOS tube 8 (M8), pin 22 of analog front-end chip (U5) is connected to one end of resistor 43 (R43), pin 21 of analog front-end chip (U5) is connected to resistor 43 (R43) in three paths. ), one end of capacitor twenty-three (C23), and a 5V power supply. Pin 20 of the analog front-end chip (U5) is connected in series with resistor thirty-six (R36) and then connected to pin 2 of the connector (J1). Pin 19 of the analog front-end chip (U5) is connected in series with resistor thirty-seven (R37) and then connected to pin 3 of the connector (J1). Pin 18 of the analog front-end chip (U5) is divided into two paths and connected to one end of resistor forty-seven (R47) and one end of capacitor twenty-seven (C27) respectively. Pin 17 of the analog front-end chip (U5) is divided into two paths and connected to one end of resistor forty-seven (R47) and one end of capacitor twenty-seven (C27). Two paths are connected to one end of resistor 48 (R48) and one end of capacitor 28 (C28) respectively. Pin 16 of the analog front-end chip (U5) is divided into two paths and connected to one end of thermistor 2 (NTC2) and one end of capacitor 29 (C29) respectively. Pin 15 of the analog front-end chip (U5) is divided into three paths and connected to one end of resistor 52 (R52), one end of capacitor 32 (C32), and one end of capacitor 34 (C34) respectively. The other end of resistor 52 (R52) is divided into eight paths and connected to the other end of resistor 59 (R59) respectively. The anode of the voltage regulator tube 4 (D13), the source of the MOS tube 5 (M5), the source of the MOS tube 8 (M8), one end of the resistor 61 (R61), one end of the resistor 62 (R62), one end of the capacitor 39 (C39), and the CRS end are connected. The other end of the capacitor 39 (C39) is connected to one end of the capacitor 38 (C38). The pin 14 of the analog front-end chip (U5) is divided into three paths and is respectively connected to one end of the resistor 53 (R53), the other end of the capacitor 32 (C32), and one end of the capacitor 35 (C35).The other end of capacitor 21 (C21), the anode of Zener diode 2 (D7), the other end of capacitor 20 (C20), the other end of capacitor 19 (C19), the anode of diode 14 (D14), the anode of diode 15 (D15), the other end of capacitor 37 (C37), the other end of resistor 60 (R60), the other end of resistor 46 (R46), pin 13 of analog front-end chip (U5), the other end of capacitor 23 (C23), the other end of resistor 47 (R47), the other end of capacitor 27 (C27), the other end of resistor 48 (R48), the other end of capacitor 28 (C28), the other end of thermistor 2 (NTC2), capacitor 29 (C29) The other end of capacitor thirty-four (C34), the other end of capacitor thirty-five (C35), the other end of resistor fifty-three (R53), the other end of resistor sixty-one (R61), the other end of resistor sixty-two (R62), and pin 4 of connector (J1) are grounded, the other end of capacitor twenty-five (C25), the anode of diode nine (D9), the cathode of diode ten (D10), the anode of voltage regulator tube three (D12), the other end of resistor fifty-eight (R58), the source of MOS tube six (M6), the source of MOS tube seven (M7), and the other end of capacitor thirty-eight (C38) are connected to the P-ground terminal, and the other end of capacitor twenty-five (C25) is the P-port of lithium battery protection circuit module (5).

7. A photovoltaic support battery protection circuit with charging management and heating management according to claim 2 or 3 or 4 or 5 or 6, characterized in that: The model of three-terminal voltage regulator tube 1 (U6) is HT7150-1, the model of three-terminal voltage regulator tube 2 (U1) is TL431, the model of comparator 1 (U3) and comparator 2 (U2) is GS8041-TR, the model of boost power management chip (U4) is SC8803QDER, and the model of analog front-end chip (U5) is SH367601B.

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