A charging control circuit, a charging control system and a charger

Abstract

The embodiment of the application discloses a charging control circuit, a charging control system and a charger. The charging control circuit comprises a slow start module and a first switch module. The first end of the slow start module is used for being connected with the positive pole of an input power supply. The slow start module is used for charging or discharging according to the input power supply. The first end of the first switch module is connected with the first end of the slow start module. The second end of the first switch module is connected with the second end of the slow start module. The third end of the first switch module is used for being connected with the positive pole of a battery. The first switch module is used for adjusting the voltage difference between the first end and the third end of the first switch module according to the voltage between the first end and the second end of the first switch module. In the above manner, the service life of the battery can be prolonged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic circuits, in particular to a charging control circuit, a charging control system and a charger. BACKGROUND

[0002] Using multiple strings of high-rate batteries for power supply is a common power supply method in many industries at present, for example, the unmanned aerial vehicle industry. Among them, the commonly used battery is a rechargeable battery.

[0003] However, when using a charger to charge the battery, if the voltage difference between the charger and the battery is large when the battery is plugged in and out, a large spike voltage will be generated, which will cause damage to the battery, thereby shortening the service life of the battery after multiple plugging and unplugging. SUMMARY

[0004] Embodiments of the present application aim to provide a charging control circuit, a charging control system and a charger, which can prolong the service life of the battery.

[0005] To achieve the above-mentioned purpose, in a first aspect, the present application provides a charging control circuit, comprising:

[0006] a soft start module, a first end of the soft start module being used for connecting with a positive electrode of an input power supply, the soft start module being used for charging or discharging according to the input power supply;

[0007] a first switch module, a first end of the first switch module being connected with a first end of the soft start module, a second end of the first switch module being connected with a second end of the soft start module, a third end of the first switch module being used for connecting with a positive electrode of a battery, the first switch module being used for adjusting a voltage difference between the first end and the third end of the first switch module according to a voltage between the first end and the second end of the first switch module.

[0008] In an optional manner, the first switch module comprises a first switch tube;

[0009] a first end of the first switch tube being connected with the second end of the soft start module, a second end of the first switch tube being connected with the first end of the soft start module, a third end of the first switch tube being used for connecting with the positive electrode of the battery.

[0010] In an optional manner, the soft start module comprises a first capacitor, a first resistor and a second resistor;

[0011] The first capacitor is connected in parallel with the first resistor, a first circuit composed of the first capacitor and the first resistor is connected in series with the second resistor, a connection point between a first end of the first circuit and a first end of the second resistor is connected with a second end of the first switch module, and a second end of the first circuit is connected with a first end of the first switch module.

[0012] In an alternative mode, the charging control circuit further comprises a first zener diode.

[0013] The anode of the first zener diode is connected with the second end of the first switch module, and the cathode of the first zener diode is connected with the first end of the first switch module.

[0014] In an alternative mode, the charging control circuit further comprises a first interface.

[0015] At least one pin is arranged on the first interface, a first pin of the at least one pin is used to be connected with the negative electrode of the battery, a second pin is connected with the third end of the slow start module, and a third pin is connected with the third end of the first switch module, wherein the first pin is short-circuited with the second pin.

[0016] In an alternative mode, the charging control circuit further comprises a second capacitor.

[0017] A first end of the second capacitor is connected with the first end of the first switch module and used to be connected with the positive electrode of the input power supply, and a second end of the second capacitor is grounded and used to be connected with the negative electrode of the input power supply.

[0018] In an alternative mode, the charging control circuit further comprises an anti-inrush module, and the first switch module is used to be connected with the positive electrode of the input power supply through the anti-inrush module.

[0019] The first end of the anti-inrush module is used to be connected with the positive electrode of the input power supply, the second end of the anti-inrush module is connected with the first end of the first switch module, and the anti-inrush module is used to control the connection state between the input power supply and the first end of the first switch module according to the voltage of the input power supply and the voltage of the first end of the first switch module.

[0020] In an alternative mode, the anti-inrush module comprises an ideal diode controller and a second switch tube.

[0021] The first end of the second switch tube is connected with the gate pin of the ideal diode controller, the second end of the second switch tube is connected with the input voltage detection pin of the ideal diode controller, and is used for being connected with the positive pole of the input power supply, the third end of the second switch tube is connected with the main power supply pin of the ideal diode controller and the output voltage detection pin of the ideal diode controller, and the off pin and the ground pin of the ideal diode controller are both grounded.

[0022] In an alternative mode, the anti-inversion module further comprises a third capacitor and a third resistor;

[0023] The third capacitor and the third resistor are connected in series, the non-series connection end of the third capacitor is grounded, the connection point between the third capacitor and the third resistor is connected with the main power supply pin of the ideal diode controller, and the non-series connection end of the third resistor is connected with the third end of the second switch tube.

[0024] In a second aspect, the embodiments of the present application provide a charging control system, comprising:

[0025] At least one charging control circuit as described above;

[0026] The charging control circuits are connected in parallel.

[0027] In a third aspect, the embodiments of the present application provide a charger, comprising the charging control system as described above.

[0028] The charging control circuit provided by the embodiments of the present application comprises a slow start module and a first switch module, when the first end of the slow start module is connected with the positive pole of the input power supply, the slow start module starts to charge, then the voltage between the first end and the second end of the slow start module gradually increases, that is, the voltage between the first end and the second end of the first switch module also gradually increases, which causes the voltage difference between the first end and the third end of the first switch module to gradually decrease, even if the voltage of the third end of the first switch module gradually increases, when the third end of the first switch module is connected with the positive pole of the battery, the voltage for charging the battery also gradually increases, it can be seen that the voltage for charging the battery will not appear instantaneous increase and generate a sharp peak voltage phenomenon, in other words, the battery will not be damaged due to the sharp peak voltage as in the prior art, thus the purpose of prolonging the service life of the battery can be achieved. BRIEF DESCRIPTION OF DRAWINGS

[0029] One or more embodiments are illustrated by way of example in the figures that are part of this document, and which illustrate the principles of the embodiments. The embodiments are not limited to the examples that are described in detail in this document. Elements having the same reference numerals in the figures indicate like elements. The figures in the drawings are not to scale and the size of one element in relation not another is intended to reflect the relationship between the elements attached to it. The figures in the drawings are not to scale and the size of one element in relation not another is intended to reflect the relationship between the elements attached to it.

[0030] Figure 1 A structure schematic diagram of a charging control system provided by an embodiment of the present application is shown in FIG. 1.

[0031] Figure 2 A structure schematic diagram of a charging control circuit provided by an embodiment of the present application is shown in FIG. 2.

[0032] Figure 3 A structure schematic diagram of a charging control circuit provided by an embodiment of the present application is shown in FIG. 2.

[0033] Figure 4 A structure schematic diagram of a charging control circuit provided by another embodiment of the present application is shown in FIG. 3.

[0034] Figure 5 A structure schematic diagram of a charging control circuit provided by another embodiment of the present application is shown in FIG. 3. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0036] Please refer to Figure 1 , Figure 1 A structure schematic diagram of a charging control system provided by an embodiment of the present application is shown in FIG. 1. As shown in FIG. 1, the charging control system includes at least one charging control circuit, and the charging control circuits are connected in parallel. Figure 1

[0037] In the charging control system, the charging control circuit A1, the charging control circuit A2, the charging control circuit A3, …, and the charging control circuit An are included, where n is a positive integer greater than 0. The first end of the charging control circuit A1 is used to be connected with the positive pole V+ of an input power supply, the second end of the charging control circuit A1 is used to be connected with the negative pole V- of the input power supply, the third end of the charging control circuit A1 is used to be connected with the positive pole B1+ of a battery B1, and the fourth end of the charging control circuit A1 is used to be connected with the negative pole B1- of the battery B1. The specific connection mode of each charging control circuit on the branch is similar to that of the charging control circuit A1, which is easily understood by those skilled in the art, and thus will not be described here.

[0038] ​Specifically, each charging control circuit is configured to control the charging process of the battery connected to the charging control circuit. For example, when the battery Bl is connected to the charging control circuit Al and the charging control circuit Al is connected to the input power supply, the charging control circuit Al is configured to control the charging process of the battery Bl. For example, when the battery Bl needs to be charged, the charging control circuit Al can control the input power supply to be in a connected state with the battery Bl, so as to charge the battery Bl by the input power supply.

[0039] In the following embodiments of the present application, the charging control circuit Al is taken as an example for illustration, and the other charging control circuits are similar to the charging control circuit Al in actual application.

[0040] As shown in Figure 2 the control circuit Al includes a soft start module 10 and a first switch module 20. The first end of the soft start module 10 is configured to be connected to the positive electrode V+ of the input power supply. The first end of the first switch module 20 is connected to the first end of the soft start module 10. The second end of the first switch module 20 is connected to the second end of the soft start module 10. The third end of the first switch module 20 is configured to be connected to the positive electrode Bl+ of the battery Bl.

[0041] In actual application, when the charging control circuit Al is connected to the input power supply and the battery Bl, first, the input power supply can charge the soft start module 10. With the charging of the soft start module 10, the voltage between the first end and the second end of the soft start module 10 increases, that is, the voltage between the first end and the second end of the first switch module 20 increases, so as to reduce the voltage difference between the first end and the third end of the first switch module 20. Therefore, the voltage of the third end of the first switch module 20 gradually increases from 0. The voltage of the third end of the first switch module 20 is used to charge the battery Bl. It can be seen that the voltage used to charge the battery Bl gradually increases. In other words, the voltage used to charge the battery Bl gradually increases in a process, so that the phenomenon of sharp voltage caused by instantaneous increase of voltage does not occur. That is, the battery is not damaged by sharp voltage as in the prior art, so that the service life of the battery can be prolonged.

[0042] In an embodiment, the first switch module 20 includes a first switch tube. Please refer to Figure 3 At this time, the first switch tube corresponds to a PMOS tube Q1. The gate of the PMOS tube Q1 is connected to the second end of the soft start module 10. The source of the PMOS tube Q1 is connected to the first end of the soft start module 10. The drain of the PMOS tube Q1 is configured to be connected to the positive electrode Bl+ of the battery Bl through the interface OUT1.

[0043] The PMOS tube Q1 can control the connection state between the interface IN1 and the interface OUT1. When the interface IN1 is connected to the input power supply and the interface OUT1 is connected to the battery B1, if the PMOS tube Q1 works in the half-conducting state, the connection state between the interface IN1 and the interface OUT1 is in the half-continuous state, and the voltage on the interface OUT1 is related to the conducting degree of the PMOS tube Q1. With the deepening of the conducting degree of the PMOS tube Q1, that is, the equivalent resistance of the PMOS tube Q1 becomes smaller, the voltage on the interface OUT1 becomes larger. If the PMOS tube Q1 works in the fully-conducting state, the connection state between the interface IN1 and the interface OUT1 is in the continuous state, and the voltage on the interface OUT1 is the voltage on the source of the PMOS tube Q1. If the PMOS tube Q1 is disconnected, the connection state between the interface IN1 and the interface OUT1 is in the disconnected state, and at this time, even if the interface IN1 is connected to the input power supply, the battery B1 will not be charged.

[0044] Optionally, the slow start module 10 comprises a first capacitor C1, a first resistor R1 and a second resistor R2, wherein the first capacitor C1 and the first resistor R1 are connected in parallel, the first circuit composed of the first capacitor C1 and the first resistor R1 is connected in series with the second resistor R2, the connection point P1 between the first end of the first circuit and the first end of the second resistor R2 is connected with the second end of the first switch module 20 (that is, the gate of the PMOS tube Q1), and the second end of the first circuit is connected with the first end of the first switch module 10 (that is, the source of the PMOS tube Q1).

[0045] When the interface IN1 is connected to the power supply, the first capacitor C1 will be charged, and the voltage across the first capacitor C1 gradually increases. Since the voltage across the first capacitor C1 is the voltage between the gate and the source of the PMOS tube Q1, the voltage between the gate and the source of the PMOS tube Q1 gradually increases, the PMOS tube Q1 gradually conducts, and the conducting degree deepens with the increase of the voltage across the first capacitor C1. When the voltage across the first capacitor C1 reaches the turn-on voltage of the PMOS tube Q1, the PMOS tube Q1 is fully conductive.

[0046] Optionally, the charging control circuit A1 further comprises a first zener diode DW1, wherein the anode of the first zener diode DW1 is connected with the second end of the first switch module 20 (that is, the gate of the PMOS tube Q1), and the cathode of the first zener diode DW1 is connected with the first end of the first switch module 20 (that is, the source of the PMOS tube Q1).

[0047] The first zener diode DW1 is used to protect the PMOS tube Q1 from being damaged by the voltage between the gate and the source of the PMOS tube Q1 being too high.

[0048] Optionally, the charging control circuit further comprises a first interface J1, and at least one pin is arranged on the first interface J1.

[0049] Figure 3 For example, the first interface J1 is provided with four pins, the first pin is connected with the third end of the slow start module 10 (i.e. the non-series end of the second resistor R2), the second pin is grounded DGND, the second pin is also used to be connected to the negative pole B1- of the battery B1 through the interface OUT2, and the third pin and the fourth pin are both connected with the third end of the first switch module 20 (i.e. the drain of the PMOS Q1), wherein the first pin and the second pin are short-circuited.

[0050] By using the first interface J1 with multiple pins, the negative poles of the entire circuit are connected together only when the negative pole B1- of the battery B1 is inserted into the first interface J1, in other words, the charging control circuit A1 will have an output only when the negative pole B1- of the battery B1 is inserted into the circuit, which can prevent the voltage and current impact of the input power supply on the battery to some extent, and can effectively prolong the service life of the battery. At the same time, when the battery B1 is not inserted into the first interface J1, the power consumption of the charging control circuit A1 can be reduced, which can meet the standby power consumption requirement of the power supply.

[0051] Optionally, the charging detection circuit A1 further comprises a second capacitor C2, the first end of the second capacitor C2 is connected with the source of the PMOS Q1, the second end of the second capacitor C2 is grounded DGND, and the second end of the second capacitor C2 is also used to be connected with the negative pole V- of the input power supply through the interface IN2.

[0052] The second capacitor C2 is used to filter the input power supply.

[0053] In summary, when the interface IN1 and the interface IN2 are connected to the positive pole V+ and the negative pole V- of the input power supply respectively, and the interface OUT1 and the interface OUT2 are connected to the positive pole B1+ and the negative pole B1- of the battery B1 respectively, the first capacitor C1 is first charged. At this time, since the voltage between the gate and the source of the PMOS Q1 is still low and lower than the opening voltage of the PMOS Q1, the PMOS Q1 is in a semi-conductor state, and as the voltage across the first capacitor C1 increases, the conduction degree of the PMOS Q1 also deepens, until the voltage across the first capacitor C1 is greater than or equal to the opening voltage of the PMOS Q1, and the PMOS is fully conductive. Thus, the phenomenon of sharp peaks in the voltage for charging the battery B1 can be avoided, and the battery is protected from being damaged by sharp voltage.

[0054] Wherein, the time from the first capacitor C1 is charged to the PMOS tube Q1 is fully on depends on the capacitance value of the first capacitor C1 or the resistance value of the second resistor R2, that is, the length of the time can be changed by changing the capacitance value of the first capacitor C1 or the resistance value of the second resistor R2 or changing the capacitance value of the first capacitor C1 and the resistance value of the second resistor R2 at the same time. Specifically, the time can be represented by the following formula: t = -R*C*ln((E-V) / E) ①, wherein t is the time, R is the resistance value of the second resistor R2, C is the capacitance value of the first capacitor C1, ln represents the natural logarithm, E is the voltage across the circuit after the first resistor R1 and the second resistor R2 are connected in series when the first capacitor C1 is initially charged, and V is the voltage across the circuit after the first resistor R1 and the second resistor R2 are connected in series when the PMOS tube is fully on. For example, assuming that the resistance value of the second resistor R2 is 300K, the capacitance value of the first capacitor C1 is 1uf, the voltage of the input power supply is 50v, the turn-on voltage of the selected PMOS tube Q1 is 3v, that is, V = (50-3) = 47v, E = 50v, and the above values are substituted into formula ①, t is about 3.1ms.

[0055] In addition, since the PMOS tube Q1 is arranged between the positive pole V+ of the input power supply and the positive pole B1+ of the battery B1, that is, the PMOS tube Q1 can be used to turn off the connection between the two positive poles, compared with turning off the connection between the two negative poles, the scheme of the present application is more complete for turning off the power supply, which can be beneficial for use in the application scenario of power supply and signal mixing.

[0056] It should be understood that, in the embodiments shown, Figure 3 In the embodiments shown, the first switch tube is taken as a PMOS tube as an example, and in other embodiments, the first switch tube can also be a triode or an IGBT switch tube and the like.

[0057] If the first switch tube is a triode, the base of the triode is the first end of the first switch tube, the emitter of the triode is the second end of the first switch tube, and the collector of the triode is the third end of the first switch tube.

[0058] If the first switch tube is a PMOS tube, the gate of the PMOS tube is the first end of the second switch tube, the source of the PMOS tube is the second end of the first switch tube, and the drain of the PMOS tube is the third end of the first switch tube.

[0059] If the first switch tube is an IGBT switch tube, the gate of the IGBT switch tube is the first end of the first switch tube, the emitter of the IGBT switch tube is the second end of the first switch tube, and the collector of the IGBT switch tube is the third end of the first switch tube.

[0060] It should be noted that, as Figure 3The circuit structure of the illustrated charging control circuit A1 is merely an example, and the charging control circuit A1 can have more or fewer components than those illustrated in the figure, can combine two or more components, or can have a different component configuration, and the various components illustrated in the figure can be implemented in hardware, software, or a combination of hardware and software including one or more signal processing and / or application specific integrated circuits.

[0061] For example, as Figure 4 illustrated, the charging control circuit A1 further includes an anti-inrush module 30, and the first switch module 20 is connected to the positive pole V+ of the input power supply through the anti-inrush module 30. The first end of the anti-inrush module 30 is used to be connected to the positive pole V+ of the input power supply, and the second end of the anti-inrush module 30 is connected to the first end of the first switch module 20.

[0062] The anti-inrush module 30 is used to control the connection state between the input power supply and the first end of the first switch module 20 according to the voltage of the input power supply and the voltage of the first end of the first switch module 20. When the voltage of the input power supply is greater than the voltage of the first end of the first switch module 20, the anti-inrush module 30 controls the connection state between the input power supply and the first end of the first switch module 20 to be in a connected state. Conversely, when the voltage of the input power supply is less than the voltage of the first end of the first switch module 20, the anti-inrush module 30 controls the connection state between the input power supply and the first end of the first switch module 20 to be in a disconnected state. At this time, the voltage of the battery B1 can be prevented from flowing back to the input power supply, and the phenomenon of mutual charging between different batteries due to the difference in battery height can also be prevented for the charging control system.

[0063] In an embodiment, as Figure 5 illustrated, the anti-inrush module 30 includes an ideal diode controller U1 and a second switch tube Q2 (which is an NMOS tube Q2 at this time), and the ideal diode controller U1 includes a GATE gate pin, an IN input voltage pin, an OUT output pin, an OFF off pin, a GND ground pin, and a VS main power pin. The GATE gate pin is connected to the gate of the NMOS tube Q2, the IN input power pin is connected to the source of the NMOS tube Q2, the IN input power pin is also used to be connected to the positive pole V+ of the input power supply, the OUT output pin is connected to the drain of the NMOS tube, the OFF off pin and the GND ground pin are both grounded, and the VS main power pin is connected to the drain of the NMOS tube.

[0064] It can be understood that in the embodiment, the ideal diode controller of model LM5050-1 is taken as an example, and the ideal diode controller of model LM5050-1 can be used in cooperation with the NMOS to timely disconnect the NMOS when the current flows reversely. In other embodiments, since the ideal diode controller has different types, when other types of ideal diode controllers are used, the specific pin definitions can be different, but the functions and signal definitions are the same. Therefore, when other types of ideal diode controllers are used, the similar setting as in the above embodiment can be used, which is within the scope of the person skilled in the art and will not be described here.

[0065] Specifically, the IN input power pin is used to detect the voltage of the input power, the OUT output pin is used to detect the voltage of the drain of the NMOS tube, and the VS main power pin is the working voltage input pin of the ideal diode controller U1. After the charging control circuit is connected to the input power and the battery respectively, when the voltage detected by the IN input power pin is greater than the voltage detected by the OUT output pin, it indicates that the current flows from the input power to the battery, at this time, the NMOS tube Q2 is controlled to be turned on, and the input power normally charges the battery; when the voltage detected by the IN input power pin is less than the voltage detected by the OUT output pin, it indicates that the current flows from the battery to the input power, at this time, the NMOS tube Q2 is controlled to be disconnected, thereby playing a role of preventing reverse flow. Of course, when the charging control circuit is applied to the charging control system, the phenomenon of mutual charging between different batteries due to the difference in height of the batteries can also be prevented.

[0066] It can be understood that the second switch tube can also be a switching element such as a triode or an IGBT switch tube. At the same time, the first switch tube and the second switch tube can be the same or different, for example, the first switch tube is a triode, and the second switch tube is an NMOS tube.

[0067] And the actual use of the second switch tube is similar to that of the first switch tube, for example, if the second switch tube is an NMOS tube, the gate of the NMOS tube is the first end of the second switch tube, the source of the NMOS tube is the second end of the second switch tube, and the drain of the NMOS tube is the third end of the second switch tube.

[0068] Optionally, the reverse flow prevention module 30 further comprises a third capacitor C3 and a third resistor R3, wherein the third capacitor C3 and the third resistor R3 are connected in series, the non-series connection end of the third capacitor C3 is grounded DGND, the connection point between the third capacitor C3 and the third resistor R3 is connected with the VS main power pin of the ideal diode controller U1, and the non-series connection end of the third resistor R3 is connected with the drain of the NMOS tube Q2.

[0069] The third capacitor C3 is used for filtering the input voltage of the VS main power pin, and the third resistor R3 is used for limiting the input current of the VS main power pin to protect the ideal diode controller U1.

[0070] It is known in the prior art that in the application scenario of multiple batteries in parallel, a Schottky diode is usually directly used to prevent unused batteries from charging each other due to different voltages. However, the on-resistance of the Schottky diode is large, and the heat is serious. However, by using the technical solution of the ideal diode controller U1 and the NOMS tube Q2 in the present application, compared with the prior art, on the one hand, it can have a lower on-resistance, and on the other hand, it will not appear the phenomenon of serious heat, and can improve the stability of the charging control circuit when working.

[0071] The embodiment of the present application also provides a charger, which comprises the charging control system in any of the above embodiments.

[0072] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; under the idea of the present application, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above. In order to be simple, they are not provided in details; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A charge control circuit, characterized by comprising: The charging control circuit comprises: a slow start module, a first end of the slow start module is used for being connected with a positive pole of an input power supply, and the slow start module is used for charging or discharging according to the input power supply; a first switch module, a first end of the first switch module is connected with the first end of the slow start module, a second end of the first switch module is connected with a second end of the slow start module, a third end of the first switch module is used for being connected with a positive pole of a battery, and the first switch module is used for adjusting a voltage difference between the first end and the third end of the first switch module according to a voltage between the first end and the second end of the first switch module; the charging control circuit further comprises a first interface; at least one pin is arranged on the first interface, a first pin of the at least one pin is used for being connected with a negative pole of the battery, a second pin is connected with the third end of the slow start module, and a third pin is connected with the third end of the first switch module, wherein the first pin is short-circuited with the second pin; the charging control circuit further comprises a first voltage stabilizing diode; an anode of the first voltage stabilizing diode is connected with the second end of the first switch module, and a cathode of the first voltage stabilizing diode is connected with the first end of the first switch module; the charging control circuit further comprises a second capacitor; a first end of the second capacitor is connected with the first end of the first switch module and used for being connected with the positive pole of the input power supply, and a second end of the second capacitor is grounded and used for being connected with a negative pole of the input power supply.

2. The charging control circuit according to claim 1, wherein the first switch module comprises a first switch tube; a first end of the first switch tube is connected with the second end of the slow start module, a second end of the first switch tube is connected with the first end of the slow start module, and a third end of the first switch tube is used for being connected with the positive pole of the battery.

3. The charging control circuit according to claim 1, wherein the slow start module comprises a first capacitor, a first resistor and a second resistor; the first capacitor and the first resistor are connected in parallel, a first circuit composed of the first capacitor and the first resistor in parallel is connected in series with the second resistor, a connection point between a first end of the first circuit and a first end of the second resistor is connected with the second end of the first switch module, and a second end of the first circuit is connected with the first end of the first switch module.

4. The charging control circuit according to any one of claims 1-3, wherein the charging control circuit further comprises an anti-backflow module, and the first switch module is used for being connected with the positive pole of the input power supply through the anti-backflow module; a first end of the anti-backflow module is used for being connected with the positive pole of the input power supply, a second end of the anti-backflow module is connected with the first end of the first switch module, and the anti-backflow module is used for controlling a connection state between the input power supply and the first end of the first switch module according to a voltage of the input power supply and a voltage of the first end of the first switch module.

5. The charging control circuit according to claim 4, wherein The anti-inrush module comprises an ideal diode controller and a second switch tube; The first end of the second switch tube is connected with the gate pin of the ideal diode controller, the second end of the second switch tube is connected with the input voltage detection pin of the ideal diode controller, and is used for being connected with the positive pole of the input power supply, the third end of the second switch tube is connected with the main power supply pin of the ideal diode controller and the output voltage detection pin of the ideal diode controller, and the off pin and the ground pin of the ideal diode controller are both grounded.

6. The charging control circuit according to claim 5, characterized in that, The anti-inrush module further comprises a third capacitor and a third resistor; The third capacitor and the third resistor are connected in series, the non-series connection end of the third capacitor is grounded, the connection point between the third capacitor and the third resistor is connected with the main power supply pin of the ideal diode controller, and the non-series connection end of the third resistor is connected with the third end of the second switch tube.

7. A charge control system characterized by comprising: It comprises: at least one charging control circuit according to any one of claims 1-6; The charging control circuits are connected in parallel.

8. A charger characterized by comprising: It comprises the charging control system according to claim 7.

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