Charging system and emergency starting device

Abstract

The utility model relates to the technical field of electronic circuits, and discloses a charging system and an emergency starting device.The charging system comprises a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit and a control circuit; the charging input interface is electrically connected with the inductor, the inductor is further connected with the first switch and the second switch, the second switch is used for being electrically connected with an energy storage power supply, and the first voltage acquisition circuit is electrically connected with the second switch and used for detecting first voltage output by the charging system in real time. The control circuit cyclically controls the conduction and cut-off time of the first switch based on the first voltage, in the charging process of the charging system, when the first voltage is smaller than a first preset voltage value, the control circuit controls the first switch to be conducted to start cyclic control, and the state of the first switch is opposite to that of the second switch. The charging system can realize stable output so as to maximize the charging efficiency of the automobile emergency starting power supply.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a charging system and an emergency starting device. Background Art

[0002] The charging system of the existing car emergency starting power supply generally adopts a dedicated charging management chip. This charging system requires that the charger used must match the charging circuit parameters inside the car emergency starting power supply. For example, if the charging circuit parameters of 5V 2A and 10W are designed, the user is required to use a 5V 2A or larger charger.

[0003] However, when the charger deviates from the designed charging specifications, for example, if the charger power is less than the designed charging power, the charger will enter protection due to insufficient power, resulting in failure to charge normally and may even damage the charger; for example, if the charger power is greater than the designed charging power, the charger power cannot be maximized, resulting in low charging efficiency and longer charging time. Utility Model Content

[0004] In view of this, the embodiments of the present application provide a charging system and an emergency starting device, which can achieve stable output according to the power of the charging circuit inside the automobile emergency starting power supply, thereby maximizing the charging efficiency, etc.

[0005] In a first aspect, an embodiment of the present application provides a charging system for charging an energy storage power supply, the charging system comprising a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit, and a control circuit;

[0006] The charging input interface is electrically connected to the first end of the inductor,

[0007] The second end of the inductor is electrically connected to the first end of the first switch and the first end of the second switch respectively.

[0008] The second end of the first switch is electrically connected to the ground end, and the second end of the second switch is electrically connected to the energy storage power supply.

[0009] The first voltage acquisition circuit is electrically connected to the second end of the second switch and is used to detect the first voltage output by the charging system in real time.

[0010] The control circuit is electrically connected to the first voltage acquisition circuit and the control end of the first switch respectively, and the control circuit controls the on and off time of the first switch based on the first voltage cycle.

[0011] During the charging process of the charging system, when the first voltage is less than a first preset voltage value, the control circuit controls the first switch to be turned on and starts the cycle control. When the first switch is in the on state, the second switch is in the off state. When the first switch is in the off state, the second switch is in the on state.

[0012] In a second aspect, an embodiment of the present application provides an emergency starting device, comprising: a built-in energy storage power supply and the charging system, wherein the second end of the second switch is electrically connected to the built-in energy storage power supply.

[0013] The embodiments of the present application have the following beneficial effects:

[0014] The charging system of the embodiment of the present application includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit and a control circuit; wherein the charging input interface is electrically connected to the inductor, the inductor is also connected to the first switch and the second switch respectively, the second switch is used to be electrically connected to the energy storage power supply, the first voltage acquisition circuit is electrically connected to the second switch, and is used to detect the first voltage output by the charging system in real time, the control circuit controls the on and off time of the first switch based on the first voltage cycle, during the charging process of the charging system, when the first voltage is less than the first preset voltage value, the control circuit controls the first switch to be turned on and starts the cycle control, when the first switch is in the on state, the second switch is in the off state, and when the first switch is in the off state, the second switch is in the on state. The charging system can control the first switch to be turned on by the control circuit to adjust the output of the charging system when the first voltage output by the charging system is less than the first preset voltage value, so as to achieve the purpose of stable output. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A schematic diagram of the structure of a charging system according to an embodiment of the present application is shown;

[0017] Figure 2 Another structural schematic diagram of the charging system according to an embodiment of the present application is shown;

[0018] Figure 3 A schematic diagram showing a structure of a first voltage acquisition circuit of a charging system according to an embodiment of the present application is shown;

[0019] Figure 4A schematic diagram showing a structure of a switch circuit of a charging system according to an embodiment of the present application is shown;

[0020] FIG. 5( a ) and FIG. 5( b ) respectively show a schematic diagram of a structure of a voltage boost unit and a voltage buck unit of a charging system according to an embodiment of the present application;

[0021] Figure 6 A schematic diagram of the structure of a synchronous / asynchronous buck-boost unit of a charging system according to an embodiment of the present application is shown;

[0022] Figure 7 A schematic diagram of the structure of a second control circuit based on a totem pole driving discrete circuit of a charging system according to an embodiment of the present application is shown;

[0023] Figure 8 A schematic diagram showing a structure of a second control circuit based on an integrated circuit of a charging system according to an embodiment of the present application is shown;

[0024] Fig. 9 A schematic diagram showing the structure of a battery protection unit of a charging system according to an embodiment of the present application is shown;

[0025] Fig.10 A schematic structural diagram of an emergency starting device according to an embodiment of the present application is shown.

[0026] Description of main component symbols:

[0027] 100-charging system; 200-energy storage power supply; 300-emergency starting device;

[0028] 11-charging input interface; 12-first voltage acquisition circuit; 13-control circuit; 14-switch circuit; 15-second voltage acquisition circuit; 16-first current acquisition circuit; 17-second current acquisition circuit; 18-first protection circuit; 19-second protection circuit; 20-third protection circuit; 21-temperature sensor; 22-charging status indication circuit; 23-battery protection unit. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0030] The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative work belong to the scope of protection of the present application.

[0031] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are intended only to indicate specific features, numbers, steps, operations, elements, components or a combination of the foregoing items, and should not be understood as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or a combination of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or a combination of the foregoing items. In addition, the terms "first", "second", "third" and the like are only used to distinguish descriptions and cannot be understood as indicating or implying relative importance.

[0032] Unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meanings as those generally understood by those skilled in the art to which the various embodiments of the present application belong. The terms (such as those defined in generally used dictionaries) will be interpreted as having the same meanings as the contextual meanings in the relevant technical field and will not be interpreted as having idealized meanings or overly formal meanings unless clearly defined in the various embodiments of the present application.

[0033] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0034] Figure 1 A schematic structural diagram of a charging system 100 according to an embodiment of the present application is shown.

[0035] Exemplarily, the charging system 100 is used to charge the energy storage power supply 200, and mainly includes: a charging input interface 11, a switch circuit 14, a first voltage acquisition circuit 12 and a control circuit 13, etc., wherein the switch circuit 14 includes an inductor, a first switch, and a second switch. Specifically, the charging input interface 11 is electrically connected to the first end of the inductor, the second end of the inductor is electrically connected to the first end of the first switch and the first end of the second switch respectively, the second end of the first switch is electrically connected to the ground end, the second end of the second switch is used to be electrically connected to the energy storage power supply 200, the first voltage acquisition circuit 12 is electrically connected to the second end of the second switch, and is used to detect the first voltage output by the charging system 100 in real time, and the control circuit 13 is electrically connected to the first voltage acquisition circuit 12 and the control end of the first switch respectively. For example, the above-mentioned energy storage power supply 200 can be, but is not limited to, a vehicle emergency starting power supply, etc.

[0036] In this embodiment, the charging input interface 11 is a universal serial bus connector, which is used to connect to an external charger to charge the energy storage power supply 200. Exemplarily, the charging input interface 11 includes a first pin, a second pin, and a third pin, wherein the first pin is a positive terminal (used to connect to the positive pole of the power supply VCC), the second pin is a negative terminal (used to connect to the negative pole of the power supply or the ground terminal GND), and the third pin is a signal terminal. The third pin is used to communicate with the external charger. For example, the fast charging function of the external charger can be turned on to enable the external charger to output different voltages to the charging system 100, which can be from 3.3V to 28V, such as 5V, 9V, 12V, 15V, 20V, 28V, etc. It can be understood that the above-mentioned first preset voltage value can be based on the voltage value required by the energy storage power supply 200. For example, when the energy storage power supply 200 is composed of 4 batteries connected in series, the first voltage preset value can be set to 16.8V, etc.

[0037] It can be understood that the structural design of the charging input interface 11 depends on the type of interface used to connect to the external charger. For example, different types of interfaces such as USB 2.0 / 3.0, USB Type-A / B / C, Lightning, etc. can be used for connection. Taking the USB Type-C connector as an example, the charging input interface 11 is used to connect to a normal (i.e., does not support the fast charging protocol) or a USB charger that supports the QC (Quick Charge) fast charging protocol, etc.

[0038] Further optionally, for the first pin and the second pin, in order to increase the overcurrent capability, the charging input interface 11 can be used with multiple pins in parallel in the hardware structure. As for the third pin, sometimes in order to ensure that the charging input interface 11 can be used normally when inserted from both sides, such as using USB Type-C, the third pin can be designed as 2 pins in the hardware structure, that is, Figure 2The CC1 and CC2 pins shown in the figure can then be connected to an external resistor or an external protocol chip to enable the output of the external charger to be turned on.

[0039] Take external resistor as an example, Figure 2 As shown, in one embodiment, the charging system 100 includes a first resistor (ie Figure 2 R8 and R9 in the figure), one end of the first resistor is electrically connected to the third pin, and the other end of the first resistor is electrically connected to the second pin. For example, the external charger usually outputs a rated voltage, such as 5V, etc. If a PD charger is connected, with the cooperation of the external resistors CC1 and CC2, the PD charger outputs a 5V voltage to the charging system 100. At this time, the control circuit 13 outputs a corresponding control signal, for example, a PWM control signal with a minimum duty cycle (such as 5%), and then controls the conduction of the first switch to obtain a voltage value (i.e., the above-mentioned first voltage) output by the charging system 100.

[0040] Taking the external protocol chip as an example, in another embodiment, the charging system 100 includes a protocol chip, and the protocol chip is electrically connected to the third pin. Further, the protocol chip is also used to control the voltage value between the first pin and the second pin to be between 3.3V and 28V. The model or existence form of the protocol chip is not limited here.

[0041] For example, in a feasible implementation, the protocol chip is a microprocessor. Considering that the control circuit 13 in the charging system 100 may also include a microprocessor MCU, a microprocessor MCU may be shared to reduce costs, etc. Therefore, the third pin may be electrically connected to the control circuit 13 to receive a control signal from the control circuit 13 to enable the external PD charger to output a voltage to the charging system 100.

[0042] As an optional solution, if a USB charger supporting the fast charging protocol is connected, the charging input interface 11 also includes a fourth pin and a fifth pin, such as corresponding to the D+ and D- signal pins in the USB Type-C interface (such as Figure 2 As shown), they are connected to two pins of the control circuit 13 (i.e., signals ICPCK D+, ICPCK D-) to realize communication between the control circuit 13 and the fast charging charger to enable fast charging voltage output, such as Qualcomm's QC2.0 and QC3.0 fast charging protocols.

[0043] In this embodiment, the first voltage acquisition circuit 12 is coupled to the output end of the charging system 100, and is used to acquire the output voltage of the charging system 100 (i.e., the first voltage mentioned above). When the charging system 100 is connected to the external charger and starts working, the control circuit 13 will output a corresponding control signal to control the first switch to be turned on, so that the charging system 100 outputs a voltage value, and the first voltage acquisition circuit 12 can then acquire the corresponding first voltage. For example, in one embodiment, Figure 3 As shown, the first voltage acquisition circuit 12 includes sampling resistors R30, R31 and a capacitor C7, wherein one end of the sampling resistor R30 is used to connect to the output end of the charging system 100 (ie Figure 3 One end of the capacitor C7 is used to connect a signal pin of the control circuit 13 (ie Figure 3 in BAT_VFB).

[0044] In this embodiment, the control circuit 13 can be used to control the on and off time of the first switch based on the first voltage cycle. Exemplarily, during the charging process of the charging system 100, when the first voltage is less than the first preset voltage value, the control circuit 13 controls the first switch to turn on and starts the cycle control. Optionally, if the second switch adopts a directly controllable device, the control circuit 13 needs to control the first switch to turn on while the second switch is turned off. After entering the cycle control, the control circuit 13 synchronously controls the state of the first switch and the second switch, wherein the state of the first switch is opposite to that of the second switch, that is, when the first switch is in the on state, the second switch is in the off state, and when the first switch is in the off state, the second switch is in the on state. It can be understood that the first switch and the second switch are used together to realize synchronous or asynchronous boost voltage conversion, and the second switch mainly plays a freewheeling role. It should be noted that for the control of the above-mentioned first switch, in addition to being based on the first voltage, it can also be combined with other parameters such as voltage and current to make a joint determination.

[0045] In this embodiment, the first switch may be a MOS tube or the like. Figure 4 As shown, the switch circuit 14 includes an inductor L1, a diode D1 (i.e., a second switch), a MOS transistor Q2 (i.e., a first switch), and a resistor R12, etc., wherein the first end of the first switch Q2 is the drain of the MOS transistor, the second end is the source plate of the MOS transistor, and the third end electrically connected to the control circuit 13 is the gate of the MOS transistor. It can be understood that Figure 4 The connection method shown in the figure is only a feasible example of the switch circuit 14 and is not intended to be the only limitation. It can be adaptively adjusted according to the model and position relationship of the MOS tube.

[0046] Based on the fact that the first switch is a MOS tube, in one embodiment, the control signal for controlling the first switch may be a PWM (Pulse Width Modulation) control signal or the like. Specifically, when the control circuit 13 detects that the first voltage is less than the first preset voltage value, the control circuit 13 outputs a PWM control signal to control the switch circuit 14 to increase the conduction time within a cycle, so as to increase the output voltage of the charging system to reach the first preset voltage value, that is, the constant voltage value required by the energy storage power supply 200. Conversely, optionally, when it is detected that the first voltage is greater than the first preset voltage value, the control circuit 13 outputs a PWM control signal to control the first switch to be turned on within a cycle to reduce the time, that is, to reduce the output voltage of the charging system to return to the first preset voltage value. It can be understood that the first preset voltage value is usually related to the charging cut-off voltage of the energy storage power supply 200, such as being set to 12.6-16.8V.

[0047] It is worth noting that the switch circuit 14 composed of the first switch and the second switch can form a boost conversion unit or a buck conversion unit. For example, in a boost scenario, as shown in FIG5(a), the first end of the inductor is connected to the input end of the charging system 100, and the two switches are arranged near the output end of the charging system 100 and are both connected to the second end of the inductor; in a buck scenario, as shown in FIG5(b), the two switches are arranged near the input end of the charging system 100 and are both connected to the first end of the inductor, and the second end of the inductor is connected to the output end of the charging system 100.

[0048] The second switch mentioned above can be a diode or a MOS tube. Taking a diode as an example, as mentioned above Figure 4 As shown, the second switch (ie Figure 4 The first end of the second switch (D1) is the anode of the diode, and the second end of the second switch (D1) is the cathode of the diode. Alternatively, taking the MOS tube as an example, the control end of the second switch (D1) is connected to the control circuit 13, the first end of the second switch (D1) can be the drain, and the second end can be the source, etc. The connection relationship between the drain and the source is adaptively adjusted according to actual needs.

[0049] It is understandable that if the second switch adopts a diode, the first switch and the second switch will be controlled in an asynchronous mode. This is because the diode has the characteristic of unidirectional conduction. In this case, the control circuit 13 only needs to control the first switch. Accordingly, the diode will be turned on or off adaptively according to the direction of the current flowing through it, so that the on-off state is opposite to that of the first switch. If the second switch adopts a MOS tube, the first switch and the second switch are controlled in a synchronous mode, that is, the control circuit 13 outputs two fully complementary PWM control signals to control the first switch and the second switch respectively.

[0050] As an optional solution, considering that the charging system 100 may also be applied to functions that sometimes need to boost the voltage and sometimes need to reduce the voltage, in one embodiment, the charging system 100 further includes a third switch and a fourth switch, such as Figure 6 As shown, the first end of the third switch is electrically connected to the charging input interface 11, the second end of the third switch is electrically connected to the first end of the inductor and the first end of the fourth switch respectively, the second end of the fourth switch is electrically connected to the ground end, and the control end of the third switch is electrically connected to the control circuit 13, and the control circuit 13 is used to control the on and off time of the third switch based on the first voltage cycle.

[0051] During the startup process of the charging system 100, the four switches are controlled accordingly mainly according to the magnitude of the input voltage of the charging system 100 and the first preset voltage value. For example, if it is detected that the input voltage of the charging system 100 is greater than the first preset voltage value, the charging system 100 will work in the buck mode, and the third switch and the fourth switch will work under the control of the PWM signal output by the control circuit 13. On the contrary, if it is detected that the input voltage is less than the first preset voltage value, the charging system 100 will work in the boost mode, and the third switch is in the on state, the fourth switch is in the off state, and the first switch and the second switch are controlled by the PWM signal output by the control circuit 13. After the charging system 100 is started, the process of charging the energy storage power supply is entered. Among them, the states of the third switch and the fourth switch are opposite, that is, when the third switch is in the on state, the fourth switch is in the off state, and when the third switch is in the off state, the fourth switch is in the on state.

[0052] During the charging process of the charging system, in one embodiment, when the charging system 100 detects that the first voltage is less than the first preset voltage value, the control circuit 13 makes the third switch in the on state and the fourth switch in the off state; conversely, when the charging system 100 detects that the first voltage is greater than the first preset voltage value, the first switch is in the off state, and the control circuit 13 controls the third switch to be off and starts the cycle control. It can be understood that by detecting that the output voltage is greater than the set value, that is, the output voltage is too large, the control circuit 13 will control the third switch to switch from the previous on state to the off state, thereby reducing the output power. In addition, if the fourth switch is a MOS tube, the states of the third switch and the fourth switch are controlled synchronously.

[0053] In another embodiment, exemplarily, during the charging process of the charging system 100, the four switches can be controlled accordingly according to the magnitude of the input voltage and the output voltage of the charging system 100. For example, when it is detected that the input voltage of the charging system 100 is greater than the output voltage (i.e., the first voltage), the first switch is turned off and the second switch is turned on, that is, the boost part enters a non-operating (i.e., non-boosting) state, and the control circuit 13 cyclically controls the on and off of the third switch and the fourth switch according to the relationship between the first voltage and the first preset voltage value, so that the first voltage is maintained equal to the first preset voltage value. Conversely, when the charging system 100 detects that the input voltage is less than the output voltage, the third switch is turned on and the fourth switch is turned off, that is, the buck part enters a non-operating (i.e., non-buckling) state, and the control circuit 13 controls the first switch and the second switch to be turned on and off cyclically.

[0054] Further, based on the structure that the third switch is a MOS tube, in one embodiment, the control signal for controlling the third switch may be a PWM control signal, etc. Similar to the first switch and the second switch mentioned above, in one embodiment, the third switch may be a MOS tube, and the fourth switch may be a diode or a MOS tube, wherein when the fourth switch adopts a diode, the first end of the fourth switch is the cathode of the diode, and the second end of the fourth switch is the anode of the diode. Similarly, if the fourth switch adopts a diode, the third switch and the fourth switch will be controlled in an asynchronous mode. It can be understood that the diode has the characteristic of unidirectional conduction, and the control circuit 13 only needs to control the third switch. Accordingly, the diode will be adaptively turned on or off according to the direction of the current flowing through it, so that the on-off state is opposite to that of the third switch. If the fourth switch adopts a MOS tube, the third switch and the fourth switch are controlled in a synchronous mode, that is, the control circuit 13 outputs two fully complementary PWM control signals to control the third switch and the fourth switch respectively.

[0055] Understandably, Figure 1 The switching circuit 14 can be described as the above-mentioned boost conversion unit, buck conversion unit or boost-boost conversion unit, and each unit includes an asynchronous mode and a synchronous mode. In other words, the switching circuit 14 can be a synchronous boost unit, an asynchronous boost unit, a synchronous buck unit and an asynchronous buck unit.

[0056] Optionally, the charging system 100 further includes a first capacitor, one end of which is electrically connected to the second end of the second switch, and the other end of the first capacitor is electrically connected to the ground. It can be understood that the first capacitor is provided at the output end of the charging system 100 as an output capacitor, which can be used to store energy and has a filtering effect. The number of the first capacitor is only an example and can be set according to actual needs, and is not limited here. For example, Figure 4As shown, the first capacitor includes C13 and C23. Further, a second capacitor may be provided before the switch circuit 14 as the input capacitor of the charging system 100, as shown in FIG. Figure 4 Capacitors C4, C5, C6 and C10 are shown.

[0057] In this embodiment, the control circuit 13 is used to cyclically control the on and off of the first switch. For example, the control circuit 13 can be implemented by a control chip capable of driving a MOS tube, or can be implemented by a structure in which the control chip and the drive circuit are separated. In one embodiment, the control circuit 13 includes a first control circuit 13 and a second control circuit 13. The first control circuit 13 is electrically connected to the first voltage acquisition circuit 12, and the second control circuit 13 is electrically connected to the first control circuit 13 and the control end of the first switch, respectively. The first control circuit 13 generates a first control signal based on the first voltage, and sends the first control signal to the second control circuit 13, so that the second control circuit 13 cyclically controls the on and off time of the first switch based on the first control signal. For example, Figure 1 As shown, the first control circuit 13 may be a microprocessor, and the second control circuit 13 may be a drive circuit for increasing the voltage and current intensity of the drive signal (such as a PWM signal), that is, increasing the drive capability. For example, the second control circuit 13 outputs a PWM control signal to the first switch to control the on-time of the first switch, etc.

[0058] For example, in one embodiment, the second control circuit 13 may be composed of discrete components, such as a totem pole drive circuit. Figure 7 As shown, the second control circuit 13 includes resistors R51, R53, and common emitter transistors Q9 and Q11, wherein the first end of the resistor R51 is used to input a signal (i.e., a first control signal) from the microprocessor MCU, and outputs a PWM signal that drives the first switch through the above-mentioned common emitter.

[0059] Of course, in some other implementations, the second control circuit 13 may also be implemented in the form of an integrated circuit, such as Figure 8 As shown, for driving the first switch, the second control circuit 13 can use an integrated chip U9 and a peripheral circuit composed of capacitors C22, C23, C24, a diode D8, and resistors R18, R20, etc. to achieve driving, and is connected to the control circuit 13 through pin PWMA. Optionally, if the second switch also uses a MOS tube, the second control circuit 13 may also include an integrated chip U10 and a corresponding peripheral circuit composed of capacitors C38, C41, C42, a diode D10, and resistors R23, R24, etc., and is connected to the control circuit 13 through pin PWMB.

[0060] It is understood that the control circuit 13 of the present embodiment refers to programs, circuits, systems and subsystems, etc., whether they are implemented in hardware, tangibly implemented in software, or both, and whether it is programmable. The term "control circuit" used herein includes, but is not limited to, one or more computing devices, hard-wired circuits, signal modification devices and systems, devices and machines for controlling systems, microprocessors, programmable devices and systems, field programmable gate arrays, application specific integrated circuits, systems on chips, systems including discrete components and / or circuits, state machines, and any combination of the foregoing.

[0061] In addition, in some other embodiments, such as Figure 1 As shown, the charging system 100 also includes a first current acquisition circuit 16, which is electrically connected to the control circuit 13 and the charging input interface 11, respectively, and is used to detect the first current input by the charging input interface 11 (i.e., the input current of the charging system 100). The control circuit 13 controls the on and off time of the first switch based on the first voltage and / or the first current cycle. In other words, the control circuit 13 can also use one or a combination of the output voltage and input current of the charging system 100 to control the first switch, thereby controlling the charging system 100 to achieve constant current or constant voltage charging. For example, Figure 2 As shown, when the charging input interface 11 adopts a USB Type-C interface, the first current acquisition circuit 16 includes resistors R7, R11 and R18, wherein one end of the resistor R18 (ie, pin USB_IFB) is used to connect to the microcontroller MCU in the control circuit 13.

[0062] In one embodiment, when the control circuit 13 detects that the first voltage is less than the first preset voltage value and the first current is less than the first preset current value, the control circuit 13 increases the output PWM control signal to control the first switch to be turned on for an increased time in one cycle. It can be understood that when the PWM control signal is increased, the output voltage or input current of the charging system 100 will increase. Among them, similar to the first preset voltage value mentioned above, the first preset current value is related to the charging current of the energy storage power supply 200, which can be set according to actual needs and is not specifically limited here. For example, for the energy storage power supply 200, if its charging current is 2A, the first preset current value is usually set to 2A.

[0063] Of course, in some scenarios where the output voltage or input current is strictly limited, in one embodiment, if it is detected that the first voltage is greater than the first preset voltage value, or the first current is greater than the first preset current value, that is, when one of the output voltage is too large or the input current is too large, the controller will reduce the output PWM control signal, such as reducing the duty cycle by 10-15%. Further optionally, when it is detected that the first voltage is greater than the first preset voltage value, and the first current is greater than the first preset current value, that is, when both conditions are met at the same time, the control circuit 13 adjusts the PWM control signal to control the first switch to be turned on within a cycle to reduce the time, that is, reduce the output voltage or input current, to ensure constant current and constant voltage charging.

[0064] In other embodiments, Figure 1 As shown, the charging system 100 further includes a second voltage acquisition circuit 15, which is electrically connected to the control circuit 13 and the charging input interface 11, respectively, and is used to detect the second voltage (i.e., the input voltage of the charging system 100) input by the charging input interface 11. The control circuit 13 controls the on and off time of the first switch based on the first voltage and / or the second voltage cycle. In other words, the control circuit 13 can also use one or a combination of the input voltage and output voltage of the charging system 100 to control the first switch, thereby controlling the output of the charging system 100.

[0065] For example, Figure 2 As shown, when the charging input interface 11 adopts a USB Type-C interface, the second voltage acquisition circuit 15 includes resistors R13 and R48, wherein the middle node of the resistors R13 and R48 (ie, the pin DCIN_VFB) is used to connect to the microcontroller MCU in the control circuit 13.

[0066] It can be understood that when controlling the first switch, when the charging system 100 detects through the second voltage acquisition circuit 15 that the second voltage is lower than the third preset voltage value, the PWM signal is reduced to reduce the output power; conversely, when the second voltage is higher than the second preset voltage value, the PWM signal is increased to increase the output power. It can be understood that the charging system 100 can make a comprehensive judgment based on the input voltage and the output voltage, thereby realizing the adaptive charging function of the charger.

[0067] For example, in one implementation, when it is detected that the second voltage is less than a third preset voltage value and the duration reaches a first preset time, the PWM control signal controls the conduction time of the first switch in one cycle to be reduced.

[0068] The purpose of setting the first preset time is to prevent the charger from entering a protection state due to overload during the second voltage drop. In other words, the first preset time should be set shorter so that the system can quickly respond to power reduction. For example, the first preset time can be set in the range of 10ms to 500ms, such as 50ms, 100ms, etc.

[0069] For example, in one implementation, when it is detected that the second voltage is higher than a second preset voltage value and the duration reaches a second preset time, the PWM control signal controls the turn-on time of the first switch in one cycle to increase.

[0070] The second preset time is set to determine whether the external charger is in a stable load state, and to increase the power only when it is in a stable state, so the second preset time should be greater than the first preset time. For example, the second preset time ranges from 10ms to 1s, such as 200ms, 250ms, etc.

[0071] In addition, considering that when the output voltage of the charging system 100 is small, the power should be increased at this time, but it should also be determined whether the input voltage of the charging system 100 meets the standard, and the power is allowed to be increased only when the input voltage is greater than a certain voltage. For example, when it is detected that the first voltage is less than the first preset voltage value, and the second voltage is greater than the second preset voltage value, the control circuit 13 controls the first switch to be turned on for a longer time in one cycle by outputting a PWM control signal.

[0072] Further optionally, in order to ensure the normal operation of the charging system 100, exemplarily, when the second voltage is less than the third preset voltage value, the control circuit 13 can control the first switch to be turned on within a cycle by outputting a PWM control signal to reduce the time to reduce the power so that the second voltage rises. It should be understood that if the second voltage is less than the third preset voltage value, it indicates that the input is overloaded (i.e., the charger is overloaded). Therefore, regardless of whether the first voltage and the first current meet the first preset voltage and the first preset current, the power must be reduced at this time. It can be understood that the third preset voltage value and the second preset voltage value are both set manually, and the two can be set to be equal or unequal. In a preferred embodiment, there can be a difference relationship between the above-mentioned third preset voltage value and the second preset voltage value.

[0073] As an optional solution, the control circuit 13 can also cyclically control the on and off time of the first switch based on the first voltage, the second voltage, and / or the first current, that is, use a combination of the first voltage, the first current, and the second voltage or one of them to achieve control.

[0074] For example, when it is detected that the first voltage is less than the first preset voltage value, the first current is less than the first preset current value, and the second voltage is greater than the second preset voltage value, the control circuit 13 can control the first switch to increase the conduction time in one cycle by outputting a PWM control signal. It can be understood that by controlling the first switch by considering the input voltage, input current and output voltage at the same time, the charging system can be better adapted to the external charger for charging, thereby improving the charging efficiency of the energy storage power supply 200. On the contrary, if it is detected that the first voltage is greater than the first preset voltage value, or the first current is greater than the first preset current value, or the second voltage is less than the third preset voltage value, the conduction time of the first switch in one cycle can be reduced by controlling the PWM control signal.

[0075] Furthermore, if it is detected that the first voltage is equal to the first preset voltage value or the first current is equal to the first current preset value, and the second voltage is greater than the third voltage preset value, the PWM control signal output by the controller for the first switch remains unchanged. Furthermore, if the second voltage is between the second preset voltage value and the third preset voltage value, the first control signal output by the controller circuit remains unchanged, which can avoid frequent adjustment of the duty cycle of the first switch, causing the output to bounce back and forth repeatedly. This is because, after increasing the power, the voltage drops immediately, and the drop causes the power to be reduced. Reducing the power will cause the voltage to rise again, and the voltage rise will cause the power to increase again.

[0076] Preferably, the difference between the third preset voltage value and the second preset voltage value may be greater than 100mV, such as 300mV, 500mV, etc., and may be adaptively set according to actual needs. For example, if the constant voltage input by the external charger is 5V, that is, when the second voltage is 5V, the second preset value may be 4.6V, and the third preset value may be 4.3V; if the second voltage is 9V, the second preset value may be 8.3V, and the third preset value may be 8.0V; and if the second voltage is 12V, the second preset value may be 11.0V, and the third preset value may be 10.5V, etc. It can be understood that the second voltage preset value and the third voltage preset value will change with the change of the second voltage.

[0077] In another embodiment, Figure 1As shown, the charging system 100 also includes a second current acquisition circuit 17, which is electrically connected to the control circuit 13 and the second end of the second switch, respectively, for detecting the second current output by the charging system 100, and the control circuit 13 controls the on and off time of the first switch based on the first voltage and / or the second current cycle. In other words, the control circuit 13 can use one or a combination of the output voltage and output current of the charging system 100 to control the first switch, and then control the charging system 100 to achieve constant voltage or constant current charging. For example, the second current acquisition circuit 17 can sample a signal from the second end (i.e., the output end) of the second switch through two sampling resistors connected in series (not shown in the figure), and transmit it to the control circuit 13 to obtain the second current output by the charging system 100.

[0078] For example, in one embodiment, when it is detected that the first voltage is less than the first preset voltage value and the second current is less than the second preset current value, that is, judging based on the first voltage and the second current, the control circuit 13 controls the first switch to be turned on in one cycle by outputting a PWM control signal to increase the time, that is, when the output voltage and output current of the charging system 100 are both less than the set value, the control circuit 13 controls to increase the PWM signal to increase the output voltage or output current of the charging system 100. Or, in another embodiment, when it is detected that the second current is greater than the second preset current value, that is, when the output current is too large, the control circuit 13 controls to reduce the output current to achieve constant current charging. In addition, the control circuit 13 can also be controlled based on the first voltage, the second voltage and the second current to more accurately achieve adaptive charging with an external charger. Among them, the values ​​of the second preset current value and the first preset current value are selected according to actual needs, and can be equal or unequal. For example, when constant current charging is required, the charging system 100 can judge based on whether the first current reaches the first preset current value or the second current reaches the second preset current value, so as to control the entry into the constant current working mode.

[0079] It is understandable that if the charging system 100 includes the above-mentioned second voltage acquisition circuit 15, first current acquisition circuit 16 and second current acquisition circuit 17, then when the control circuit 13 controls the first switch to increase, decrease or maintain the conduction time in a cycle, it can be combined with at least two combinations of the above-mentioned first voltage, second voltage, first current and second current, and can be set according to actual needs. By comprehensively judging the four parameters of the first voltage, second voltage, first current and second current, it is possible to better realize charging management such as input current limitation, output current limitation (for battery safety and life) on the basis of realizing adaptive charging with an external charger.

[0080] In addition, considering the safety of the system, in some other embodiments, the charging system 100 also includes a corresponding protection circuit to perform charging protection when parameters such as the first voltage, the second voltage, the first current and / or the second current do not meet the corresponding conditions, such as prohibiting the input and charging of the charging system 100.

[0081] For example, Figure 1 As shown, the charging system 100 also includes a first protection circuit 18, wherein the first protection circuit 18 is used to prevent surge voltage, and in addition, it can also be used to prevent static electricity, etc. The first protection circuit 18 can be set on the line connected to the input circuit in the charging system 100, and can be set after the charging input interface 11, etc., so as to play a role in preventing surges when the external charger is connected. For example, the first protection circuit 18 can be implemented by a fuse, a discharge tube, etc., such as Figure 2 As shown, TVS tubes Z1 and Z2 are used to protect against surges at the input end, and absorb surge currents instantly to protect the subsequent circuits.

[0082] Further optionally, if Figure 1 As shown, the charging system 100 further includes a second protection circuit 19, wherein the second protection circuit 19 is electrically connected to the charging input interface 11, and is used for prohibiting the charging of the charging system 100 when the second voltage is greater than a fourth preset voltage value and the duration reaches a second preset time, that is, the input voltage of the charging system 100 exceeds the corresponding preset value and lasts for a period of time. For example, assuming that the second voltage is usually output at 5V, when it is detected that the second voltage is greater than 8V and lasts for 50ms, the second protection circuit 19 will perform charging protection.

[0083] As an optional solution, the second protection circuit 19 can also be combined with the control circuit 13 to implement input protection of the charging system 100. Exemplarily, the second protection circuit 19 is electrically connected to the control circuit 13 and the charging input interface 11 respectively. The control circuit 13 is used to output a control signal to the second protection circuit 19 when the second voltage is greater than the third preset voltage value and the duration reaches the second preset time, so that the second protection circuit 19 prohibits charging of the charging system 100. For example, Figure 2 As shown, the second protection circuit 19 includes resistors R46, R49, R50, a voltage regulator D5, a transistor Q3, a MOS transistor Q5 and a capacitor C35, wherein the resistor R46 is connected in parallel with the voltage regulator D5 to the power input terminal DC_IN, and the MOS transistor Q5 is used to be in a shut-off state when the second voltage is greater than 11V, so that DC_IN cannot be input through the charging input interface 11.

[0084] As another alternative, Figure 1As shown, the charging system 100 further includes a third protection circuit 20, wherein the third protection circuit 20 is electrically connected to the second end of the second switch, and the third protection circuit 20 is used to control the first voltage to be below the fifth preset voltage value when the first voltage is greater than the fifth preset voltage value and the duration reaches the third preset time. It can be understood that the third protection circuit 20 is used to implement output protection of the charging system 100, especially when the output voltage is too large (such as exceeding 17V, etc.), it needs to be controlled within a safe voltage range. For example, the third protection circuit 20 includes a voltage stabilizing diode, etc.

[0085] In addition, if Figure 1 As shown, the charging system 100 further includes a battery protection unit 23, wherein the battery protection unit 23 is electrically connected to the second end of the second switch, and is used to control the on-time of the first switch to be reduced after the energy storage battery is charged, so as to reduce the output power or stop charging, etc., thereby realizing charging protection, which can improve the service life of the energy storage power supply 200, etc. For example, Fig. 9 The figure shows a lithium battery protection unit 23, which includes a protection chip U1 dedicated to lithium batteries or polymer batteries and its corresponding peripheral devices, and is connected to the battery socket CN1 to achieve charging protection.

[0086] As an alternative, Figure 1 As shown, the charging system 100 further includes a temperature sensor 21, which is arranged within a preset distance range of the first switch and / or the inductor. In other words, the temperature sensor 21 is used to be arranged within a preset distance range of the first switch and / or the inductor so as to detect the temperature of the switch and / or the inductor. It can be understood that by arranging the temperature sensor 21 near the switch tube and / or the inductor, it is used to collect the temperature of the power device, so that when the temperature reaches a preset temperature threshold (such as 90°C, 100°C, etc.), the control circuit 13 stops the charging system 100 from working to achieve temperature protection.

[0087] As an alternative, Figure 1 As shown, the charging system 100 also includes a charging status indication circuit 22, which is used to indicate the power value, charging status (such as charging, charging completed, etc.) and related parameters (such as the first voltage, the second voltage, the first current, the second current, the temperature value, etc.) of the energy storage power supply 200. For example, it can be implemented by using LED lights, digital tubes, liquid crystal display screens, etc.

[0088] The charging system 100 proposed in the present application adjusts the charging power by combining the variation range of at least one of the output voltage and output current, the input voltage and input current, etc., so as to achieve adaption to chargers of various different powers; not only that, the charging input interface 11 is also provided with three pins, including an enable signal pin, which can enable special functions such as fast charging, and adapt to different types of chargers, such as PD chargers, fast charging chargers, etc., to achieve maximum compatibility with chargers of various specifications, improve charging efficiency, and save energy.

[0089] In addition, the present application also proposes an emergency starting device 300, which is exemplary as follows: Fig.10 As shown, the emergency starting device 300 includes: the above-mentioned charging system 100 and a built-in energy storage power supply 200, wherein the second end of the second switch is electrically connected to the built-in energy storage power supply 200. It can be understood that the options in the above-mentioned charging system 100 are also applicable to this embodiment, and will not be repeated here.

[0090] In several embodiments provided in the present application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely schematic. For example, the flowcharts and structure diagrams in the accompanying drawings show the possible architecture, functions and operations of the devices, methods and computer program products according to multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of a code, and the module, a program segment or a part of a code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the structure diagram and / or the flow diagram, and the combination of boxes in the structure diagram and / or the flow diagram, can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0091] In addition, the functional modules or units in the various embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.

[0092] If the function is implemented in the form of a software function module and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art, and the computer software product is stored in a storage medium, including several instructions for a computer device (which can be a smart phone, a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk.

[0093] The above description is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application.

Claims

1. A charging system for charging an energy storage power source, characterized in that: The charging system includes a charging input interface, an inductor, a first switch, a second switch, a first voltage acquisition circuit and a control circuit; The charging input interface is electrically connected to the first end of the inductor, The second end of the inductor is electrically connected to the first end of the first switch and the first end of the second switch respectively. The second end of the first switch is electrically connected to the ground end, and the second end of the second switch is electrically connected to the energy storage power supply. The first voltage acquisition circuit is electrically connected to the second end of the second switch and is used to detect the first voltage output by the charging system in real time. The control circuit is electrically connected to the first voltage acquisition circuit and the control end of the first switch respectively, and the control circuit controls the on and off time of the first switch based on the first voltage cycle. During the charging process of the charging system, when the first voltage is less than a first preset voltage value, the control circuit controls the first switch to be turned on and starts the cycle control. When the first switch is in the on state, the second switch is in the off state. When the first switch is in the off state, the second switch is in the on state.

2. The charging system according to claim 1, characterized in that: The first switch is a MOS tube, the second switch is a diode, the first end of the second switch is an anode of the diode, and the second end of the second switch is a cathode of the diode.

3. The charging system according to claim 1, characterized in that: The control circuit outputs a PWM control signal to the first switch.

4. The charging system according to claim 3, characterized in that: The PWM control signal controls the first switch to be turned on for a longer period of time in one cycle.

5. The charging system according to claim 4, characterized in that: When the first voltage is greater than the first preset voltage value, the PWM control signal controls the first switch to be turned on for a shorter period of time in one cycle.

6. The charging system according to claim 1, characterized in that: The first switch is a MOS transistor, the second switch is a MOS transistor, and a control end of the second switch is connected to the control circuit.

7. The charging system according to claim 1, characterized in that: The charging system further includes a first capacitor, one end of the first capacitor is electrically connected to the second end of the second switch, and the other end of the first capacitor is electrically connected to the ground end.

8. The charging system according to claim 1, characterized in that: The charging input interface is a universal serial bus connector.

9. The charging system according to claim 8, characterized in that: The charging input interface includes a first pin, a second pin, and a third pin. The first pin is a positive terminal, the second pin is a negative terminal, and the third pin is a signal terminal. The third pin is used to communicate with an external charger.

10. The charging system according to claim 9, characterized in that: The charging system includes a first resistor, one end of the first resistor is electrically connected to the third pin, and the other end of the first resistor is electrically connected to the second pin.

11. The charging system according to claim 9, characterized in that: The charging system includes a protocol chip, and the protocol chip is electrically connected to the third pin.

12. The charging system according to claim 11, characterized in that: The protocol chip controls the voltage value between the first pin and the second pin to be between 3.3V and 28V.

13. The charging system according to claim 9, characterized in that: The control circuit is a microprocessor, and the third pin is electrically connected to the control circuit.

14. The charging system according to claim 3, characterized in that: The charging system also includes a first current acquisition circuit, which is electrically connected to the control circuit and the charging input interface respectively, and is used to detect a first current input by the charging input interface. The control circuit controls the on and off time of the first switch based on the first voltage and / or the first current cycle.

15. The charging system according to claim 14, characterized in that: When the first voltage is less than the first preset voltage value, and the first current is less than the first preset current value, the PWM control signal controls the first switch to be turned on for a longer period of time in one cycle.

16. The charging system according to claim 15, characterized in that: When the first voltage is greater than the first preset voltage value, or the first current is greater than the first preset current value, the PWM control signal controls the first switch to be turned on in one cycle to reduce the time.

17. The charging system according to claim 3, characterized in that: The charging system also includes a second voltage acquisition circuit, which is electrically connected to the control circuit and the charging input interface respectively, and is used to detect a second voltage input by the charging input interface. The control circuit cyclically controls the on and off time of the first switch based on the first voltage and / or the second voltage.

18. The charging system according to claim 17, characterized in that: When the first voltage is less than the first preset voltage value and the second voltage is greater than a second preset voltage value, the PWM control signal controls the first switch to be turned on for a longer period of time in one cycle.

19. The charging system according to claim 17, characterized in that: When the first voltage is greater than the first preset voltage value, or the second voltage is less than a third preset voltage value, the PWM control signal controls the first switch to be turned on for a shorter period of time in one cycle.

20. The charging system according to claim 17, characterized in that: When the second voltage is less than a third preset voltage value and the duration reaches a first preset time, the PWM control signal controls the first switch to be turned on in one cycle to reduce the time.

21. The charging system according to claim 3, characterized in that: The charging system also includes a second current acquisition circuit, which is electrically connected to the control circuit and the second end of the second switch respectively, and is used to detect a second current output by the charging system. The control circuit controls the on and off time of the first switch based on the first voltage and / or the second current cycle.

22. The charging system according to claim 21, characterized in that: When the first voltage is less than the first preset voltage value and the second current is less than the second preset current value, the PWM control signal controls the first switch to be turned on for a longer period of time in one cycle.

23. The charging system according to claim 1, characterized in that: The charging system further includes a first protection circuit, which is used to prevent static electricity and / or surge voltage.

24. The charging system according to claim 1, characterized in that: The charging system also includes a second protection circuit, which is electrically connected to the charging input interface and is used to prohibit charging of the charging system when a second voltage input to the charging input interface is greater than a fourth preset voltage value and lasts for a second preset time.

25. The charging system according to claim 1, characterized in that: The charging system also includes a second protection circuit, which is electrically connected to the control circuit and the charging input interface respectively. The control circuit is used to output a control signal to the second protection circuit when a second voltage input to the charging input interface is greater than a fourth preset voltage value and lasts for a second preset time, so that the second protection circuit prohibits charging of the charging system.

26. The charging system according to claim 1, characterized in that: The charging system also includes a third protection circuit, which is electrically connected to the second end of the second switch and is used to control the first voltage to be below the fifth preset voltage value when the first voltage is greater than the fifth preset voltage value and lasts for a third preset time.

27. The charging system according to claim 26, characterized in that: The third protection circuit includes a voltage stabilizing diode.

28. The charging system according to claim 1, characterized in that: The control circuit includes a first control circuit and a second control circuit, the first control circuit is electrically connected to the first voltage acquisition circuit, the second control circuit is electrically connected to the first control circuit and the control end of the first switch respectively, the first control circuit generates a first control signal based on the first voltage, and the second control circuit cyclically controls the on and off time of the first switch based on the first control signal.

29. The charging system according to claim 28, characterized in that The second control circuit is a totem pole drive discrete circuit or a chip integrated circuit.

30. The charging system according to claim 28, characterized in that The second control circuit outputs a PWM control signal to the first switch.

31. The charging system according to claim 1, characterized in that: The charging system further includes a temperature sensor, and the temperature sensor is disposed within a preset distance range of the first switch and / or the inductor.

32. The charging system according to claim 1, characterized in that The charging system further includes a third switch and a fourth switch, wherein a first end of the third switch is electrically connected to the charging input interface, a second end of the third switch is electrically connected to a first end of the inductor and a first end of the fourth switch respectively, a second end of the fourth switch is electrically connected to the ground end, a control end of the third switch is electrically connected to the control circuit, and the control circuit is used to control the on and off time of the third switch based on the first voltage cycle, During the charging process of the charging system, when the first voltage is less than the first preset voltage value, the third switch is in an on state and the fourth switch is in an off state; when the first voltage is greater than the first preset voltage value, the first switch is in an off state, the control circuit controls the third switch to be cut off and starts a cycle control; when the third switch is in an on state, the fourth switch is in an off state; when the third switch is in an off state, the fourth switch is in an on state.

33. The charging system according to claim 32, characterized in that: The third switch is a MOS tube, the fourth switch is a diode, the first end of the fourth switch is the cathode of the diode, and the second end of the fourth switch is the anode of the diode.

34. The charging system according to claim 32, characterized in that The control circuit outputs a PWM control signal to the third switch.

35. The charging system according to claim 32, characterized in that When the first voltage is greater than the first preset voltage value and the duration reaches a second preset time, the control circuit controls the third switch to be turned off to start the cycle control.

36. An emergency starting device, characterized in that: include: A built-in energy storage power supply and a charging system as described in any one of claims 1-35, wherein the second end of the second switch is electrically connected to the built-in energy storage power supply.

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