TWI745634B - Method and apparatus for controlling the electrical connection and disconnection between a battery unit and a supercapacitor on an automobile - Google Patents

Abstract

A method and apparatus is proposed for controlling the electrical connection and disconnection between a battery unit and a supercapacitor on an automobile with the objective of preventing the electrical connection between the battery unit and the supercapacitor from being exceedingly long that would otherwise cause degraded power supply performance or even damage to the battery unit due to the self-discharging property of the supercapacitor. This feature can help to improve the power supply performance and extends the battery life. The proposed method and apparatus is characterized by the steps that the supercapacitor is electrically connected to the battery unit only at a temporal point when there is a need to use the supercapacitor, and immediately disconnected from the supercapacitor whenever there is no more need to use the supercapacitor.

Description

Method and device for controlling electrical connection between vehicle battery and super capacitor

The present invention relates to a vehicle battery power supply technology, in particular to a method and device for controlling the electrical connection between a vehicle battery and a supercapacitor, which can be applied to a vehicle and used to control a battery pack and a supercapacitor used in the vehicle. The time point of the electrical connection between the capacitors, so that the supercapacitor is only electrically connected to the battery pack at the time when it is ready to be activated, and at the time when the vehicle stops running, it is immediately cut off between the two The electrical connection of the battery can improve the power supply performance of the battery and prolong the service life of the battery.

Vehicles are currently a widely popular means of transportation. Its main feature is the use of batteries and starter motors as a gasoline engine as a source of power. However, there is a problem in the application of batteries in vehicles, that is, when the battery is discharged at a high current, such as the moment the motor starts, overtaking, or climbing, it will easily cause damage to the battery and cause rapid aging. The problem. A feasible solution to this problem is to match the battery with a supercapacitor (referred to as supercapacitor or ultracapacitor in English), so that the supercapacitor can be used to provide instantaneous high current to the starter motor, thereby improving the power efficiency of the battery and extending it The service life of the battery.

However, in the application of supercapacitors in vehicles, the current common practice is to permanently connect the battery to the supercapacitor, but this approach may cause the following problems. Since the super capacitor itself is easy to self-discharge, if the electrical connection between the battery and the super capacitor takes too long, it will cause the super capacitor to continuously draw power to the battery, which may cause the battery power to continue to be wasted Bad results can even cause the battery to break.

In view of the above-mentioned problems, the application of vehicles requires a feasible solution, which can be used to avoid the electrical connection between the battery and the super capacitor for too long, so as to prevent the self-discharge of the super capacitor from causing damage to the battery. The result of adverse effects and damage.

The main purpose of the present invention is to propose a feasible solution to the aforementioned problem, which can be used to avoid the electrical connection between the battery and the super capacitor for too long, so as to prevent the self-discharge of the super capacitor from causing bad effects on the battery. As a result of the influence and damage of the battery, the power supply efficiency of the battery is improved and the service life of the battery is prolonged.

The research and development subject of the present invention is how to control the time point of the electrical connection between the battery and the supercapacitor, that is, only connect the battery to the supercapacitor at the time when it is needed. That is to immediately cut off the electrical connection between the two.

The method for controlling the electrical connection between the battery and the super capacitor of the present invention includes the following steps: (1) At the time when the vehicle is switched to a pre-activated state, the battery pack is connected to the super capacitor, so that the battery pack is The super capacitor is charged; (2) At the point in time when the starting motor is started, the super capacitor is made to provide a momentary high current to the starting motor, thereby accelerating the initial starting operation of driving the starting motor; (3) In the During the running of the vehicle, the battery pack is kept in parallel to the super capacitor, thereby providing a steady-state fixed voltage to the power system of the vehicle; and when the power system has an excessive load, the super capacitor is made to provide a An instantaneous large current is supplied to the power system; and (4) at the point in time when the vehicle is switched to a stopped state, the electrical connection between the battery pack and the super capacitor is cut off.

In specific implementation, the electrical connection control device between the battery and the super capacitor of the present invention includes: (a) a control unit; (b) an operation state detection unit; (c) a switch; (d) a booster Conversion circuit; (e) a first voltage sensing module and a second voltage sensing module.

In summary, the present invention addresses a problem in the application of supercapacitors in vehicles, that is, if the electrical connection between the supercapacitor and the battery pack is too long, the battery pack will be adversely affected and damaged. A feasible solution was proposed. The technical means used in the present invention to solve the problem is to electrically connect the super capacitor to the battery pack at the time when the vehicle is ready to be activated by the user, and immediately cut off the super capacitor and the battery pack at the time when the vehicle is stopped. Electrical connection between battery packs. Therefore, the present invention can be used to prevent the electrical connection between the battery pack and the supercapacitor from being too long, resulting in the discharge and self-discharge of the supercapacitor from adversely affecting and damaging the battery pack, thereby improving the power supply efficiency of the battery and extending the battery. Service life.

The technical content and embodiments of the method and device for controlling the electrical connection between the vehicle battery and the supercapacitor of the present invention are disclosed in detail below in conjunction with the accompanying drawings.

FIG. 1 shows the electrical connection control device between the battery and the supercapacitor of the present invention (such as the block indicated by the number 100, hereinafter referred to as the electrical connection control device between the battery and the supercapacitor) is applied to a vehicle 10 structure. In specific implementation, the vehicle 10 can be any vehicle driven by battery power, such as a four-wheeled vehicle, a three-wheeled vehicle, or a two-wheeled locomotive. The vehicle 10 uses a starter motor 20 to drive wheels, and uses a battery pack 30 to supply electric power to the starter motor 20. In addition, in order to prevent the battery pack 30 from being discharged at a high current, such as the moment the motor is initially started, overtaking, or climbing, which may easily damage the battery pack 30 and cause rapid aging, the vehicle 10 is additionally provided There is a supercapacitor (called supercapacitor or ultracapacitor in English) 40. The capacity of the supercapacitor 40 is greater than 0.1 farad (F). The supercapacitor 40 can be used to provide instantaneous large current to the starter motor 20, thereby improving battery performance. Power supply efficiency and extended service life. Furthermore, the vehicle 10 uses a power system 50 to allow the battery pack 30 to provide power to other devices, such as vehicle lights, horns, and various vehicle equipment.

However, as described in the prior art, if the electrical connection between the battery pack 30 and the super capacitor 40 is always fixed, it will cause the aforementioned problems in the prior art. Therefore, in view of these problems, the electrical connection control device 100 between the battery and the supercapacitor of the present invention provides a feasible solution.

The electrical connection control device 100 between the battery and the supercapacitor of the present invention can be used to control the time point when the battery pack 30 is electrically connected to the supercapacitor 40, that is, the time point when the user prepares to activate the vehicle 10 before connecting the battery pack 30 To the super capacitor 40; and when the vehicle 10 stops running, the electrical connection between the battery pack 30 and the super capacitor 40 is immediately cut off.

Figure 2 shows a feasible embodiment of the electrical connection control device 100 between the battery and the supercapacitor of the present invention. Its architecture includes: (a) a control unit 110; (b) an operating state detection unit 120; c) a switch 130; (d) a boost converter circuit 140; (e) a first voltage sensing module 151 and a second voltage sensing module 152. In the following, the individual attributes and functions of these components will be explained separately.

The control unit 110 is used to provide a master control function for the operation of the electrical connection control device 100 between the battery and the super capacitor of the present invention. The specific implementation of the control unit 110 may be, for example, a microprocessor, especially an embedded microprocessor, or a customized or programmable logic circuit, such as an application-specific integrated circuit (Application-Specific Integrated Circuit (ASIC), Field Programmable Gate Array (FPGA), Programmable Logic Device (PLD), Programmable Logic Array (PLD), Programmable Programmable Array Logic (Programmable Array Logic, PAL), etc.

The operating state detection unit 120 can be used to detect the operating state of the vehicle 10, including the pre-enabled state, the motor start state, and the stop state, and at the point in time when the pre-enabled state is detected, it sends a capacitor connection enable signal to The control unit 110 sends a capacitor cut-off enable signal to the control unit 110 at the point in time when it detects the stopped driving state. In terms of specific implementation, since the current vehicles on the market may have many different ways of use and operation, such as using a remote control to lock and unlock, or using a key switch to lock and unlock and start the motor, the present invention The so-called pre-activated state can be, for example, one of the following operating states:

(1) The point in time when the user uses a remote control to which the vehicle 10 belongs to send an unlock signal.

(2) The time when the user uses a key belonging to the vehicle 10 to insert a key switch on the vehicle for unlocking.

(3) As shown in Fig. 4, at the moment when the starter motor 20 is started, the output voltage of the battery pack 30 suddenly drops from the no-load voltage value of Vo to a point in time when a predetermined voltage difference ΔV is generated.

At the time point when the operation state detection unit 120 detects one of the above operation states, it sends out a capacitor connection enable signal and transmits this signal to the control unit 110. Conversely, the operating state detection unit 120 sends out a capacitor cut-off enable signal at the point in time when the vehicle 10 is in a stopped state, and transmits this signal to the control unit 110.

The waveform diagram of FIG. 4 shows the waveform change of the output voltage of the battery pack 30 involved in the third operating state above after the starter motor 20 is started to start. As shown in Figure 4, assuming that the no-load voltage value of the battery pack 30 is Vo when the battery pack 30 is in the no-load state, at the moment when the starter motor 20 is started, the waveform of the output voltage of the battery pack 30 includes the following transitions Points: P1, P2, P3, P4, P5, as described below: P1: the rated output voltage value of the battery pack 30 at the initial no-load is Vo; P2: the output of the battery pack 30 at the moment when the starter motor 20 is started Voltage, such as: the first stage of the key, the voltage drop generated by the key to turn on the vehicle's one-stage switch or the voltage drop generated by the remote control when the door is opened; P3: Because the starter motor 20 needs a momentary high current during the start of the start Therefore, the output voltage of the battery pack 30 will produce a sharply reduced waveform at the moment the starter motor 20 is started, and P3 is the lowest point of this drop waveform; P4: the output voltage of the battery pack 30 reaches the lowest point It will gradually recover after P3; P5: The output voltage of the battery pack 30 has risen above the rated output voltage value, and the vehicle has started at this point.

In the waveform diagram shown in Figure 4, the present invention selects an appropriate point Q as the trigger point of the pre-activated state between P2 and P3, and the voltage difference between Q and P1 is ΔV, That is, when the operating state detection unit 120 detects that the output voltage of the battery pack 30 is reduced from the state where the rated output voltage value is Vo when there is no load to a predetermined voltage difference ΔV, it sends a capacitor connection enable signal. Give to the control unit 110.

The switch 130 is connected between the battery pack 30 and the super capacitor 40, and can be controlled by the control unit 110 to switch to the on state or the off state. If the control unit 110 receives the capacitor connection enable signal sent by the operation state detection unit 120, it will switch the switch 130 to the on state; otherwise, if it receives the capacitor disconnection from the operation state detection unit 120 The enable signal will switch the switch 130 to the disconnected state. When the switch 130 is switched to the on state, it can connect the battery pack 30 to the super capacitor 40, so that the output power of the battery pack 30 can be charged to the super capacitor 40; on the contrary, when it is switched to the off state , The electrical connection between the battery pack 30 and the super capacitor 40 is cut off.

The boost converter circuit 140 is connected between the battery pack 30 and the super capacitor 40, and its activation is controlled by the boost enable signal BOOST of the control unit 110. When the boost converter circuit 140 is activated, the battery pack 30 charges the super capacitor 40 through the boost converter circuit 140. As shown in the figure, the circuit structure of the boost converter circuit 140 includes a transistor switch 141, an inductor 142, a diode 143, and a capacitor 144. Since the circuit structure of the boost converter circuit 140 belongs to the conventional technology, the circuit structure will not be described in detail below.

The first voltage sensing module 151 is used to sense the battery voltage value V _B currently output by the battery pack 30 and transmit the sensed battery voltage value V _B to the control unit 110; and the second voltage sensing module 152 It is used to sense the current capacitance voltage value Vc of the supercapacitor 40 and transmit the sensed capacitance voltage value Vc to the control unit 110. The control unit 110 first converts the sensed battery voltage value V _B and the capacitor voltage value Vc into a digital value using its built-in A/D analog-to-digital conversion function, and then compares the two values. If the current battery voltage value V _{B of the} battery pack 30 is greater than the capacitance voltage value Vc of the super capacitor 40, the control unit 110 only makes the switch 130 switch to the on state, but does not activate the boost converter circuit 140, thereby making the battery pack 30 The output power is directly used to charge the supercapacitor 40. Conversely, if the battery voltage value V _B output by the battery pack 30 is less than the capacitance voltage value Vc of the super capacitor 40, the control unit 110 uses the boost enable signal BOOST to activate the boost conversion circuit 140, so that the battery pack 30 boosts The conversion circuit 140 charges the super capacitor 40.

In addition, in this embodiment, the electrical connection control device 100 between the battery and the supercapacitor of the present invention is externally connected to an input and output control unit 200, so that it can be externally connected to a keyboard and a screen display (not shown in Figure), and can also be externally connected to a wireless network system (not shown in the figure), such as Bluetooth, 4G, Zigbee, UART, used to electrically connect the battery and supercapacitor of the present invention to the control device 100 The operating status of is displayed to the driver through the screen display, or transmitted to the personnel of the remote vehicle driving monitoring center through the wireless network system.

The following is a description of the operation flow of the electrical connection control device 100 between the battery and the supercapacitor of the present invention in practical application in conjunction with FIG. 3.

In step S0, the control unit 110 first performs system initialization and sets the no-load voltage value of the battery pack 30 to the rated voltage value of Vo. When the vehicle 10 is in an unused state, the switch 130 is switched to a disconnected state, so that the super capacitor 40 is not electrically connected to the battery pack 30.

Next, in step S1, the control unit 110 waits for whether the operating state detection unit 120 detects that the vehicle 10 is switched to the pre-activated state; if so, proceed to the next step S2; otherwise, if not, continue to wait. This pre-activated state is, for example, that the user uses a remote control of the vehicle 10 to send out an unlock signal, or the user uses a key of the vehicle 10 to insert into a key switch on the vehicle, or starts the motor. The moment when 20 is started, the output voltage of the battery pack 30 suddenly drops from the no-load voltage value Vo to a predetermined voltage difference ΔV. At the time point when the operating state detection unit 120 detects the pre-enabled state, it responds and sends a capacitor connection enable signal to the control unit 110, and the control unit 110 responds to perform step S2.

In step S2, the control unit 110 _{compares the current battery voltage value V B} output by the battery pack 30 with the current capacitor voltage value Vc of the super capacitor 40, where the battery voltage value V _B of the battery pack 30 is determined by the first voltage The sensing module 151 senses the capacitance voltage Vc of the super capacitor 40 is sensed by the second voltage sensing module 152. _{If the battery voltage value V B} currently output by the battery pack 30 is greater than the current capacitance voltage value Vc of the super capacitor 40, the control unit 110 proceeds to step S3; otherwise, it proceeds to step S4.

In step S3, the control unit 110 sends a switch signal SW to the switch 130 to switch the switch 130 to the on state, thereby electrically connecting the battery pack 30 to the super capacitor 40, so that the output power of the battery pack 30 can be used for the super capacitor. 40 to charge. Then, step S5 is executed.

In step S4, the control unit 110 sends a boost enable signal BOOST to activate the boost converter circuit 140, so that the battery pack 30 charges the super capacitor 40 through the boost converter circuit 140. Then, step S5 is executed.

In step S5, the control unit 110 enables the output power of the battery pack 30 to be used to charge the super capacitor 40.

Next, in step S6, the control unit 110 waits for the operation state detection unit 120 to detect whether the vehicle 10 is switched to the motor start state, that is, the motor switch 21 is switched to the on state to connect the starter motor 20 to the battery pack 30 and super Capacitor 40. If yes, proceed to the next step S7; otherwise, if no, continue to wait.

In step S7, when the starter motor 20 is started, since the starter motor 20 needs to use a momentary high current to drive acceleration, the control unit 110 keeps the switch 130 in the on-state to make the super capacitor 40 The capacitor voltage value Vc can be used to provide a momentary high voltage and large current to the starter motor 20 to drive and accelerate the initial start-up operation of the starter motor 20. During the traveling of the vehicle 10, the battery pack 30 is connected in parallel to the super capacitor 40, thereby providing a steady-state fixed voltage to the power system 50 of the vehicle; and when the power system 50 has an excessive load, the super capacitor 40 provides an instantaneous large current to the power system 50.

Next, in step S8, the control unit 110 waits for the operation state detection unit 120 to detect whether the vehicle 10 is switched to the stopped state, that is, the user is prepared to no longer use the vehicle 10. If yes, proceed to the next step S9; otherwise, if no, continue to wait.

In step S9, when the vehicle 10 is switched to the stopped state, the control unit 110 will switch the switch 130 back to the disconnected state, thereby cutting off the electrical connection between the battery pack 30 and the super capacitor 40 for It is avoided that the electrical connection between the battery pack 30 and the super capacitor 40 takes too long, thereby preventing the self-discharge of the super capacitor 40 from causing adverse effects and damage to the battery pack 30.

After the switch 130 is switched back to the disconnected state, the above procedure jumps back to step S1 to make the control unit 110 wait for the vehicle 10 to be switched to the pre-activated state, that is, whether the operating state detecting unit 120 sends a capacitor connected to it. Can signal; if yes, repeat the above steps.

In the above operation process, because the present invention can electrically connect the super capacitor 40 to the battery pack 30 at the time when the vehicle 10 is ready to be activated by the user, and at the time when the vehicle is stopped, the super capacitor 40 is immediately cut off. The electrical connection between the capacitor 40 and the battery pack 30, therefore, the present invention can be used to prevent the electrical connection between the battery pack 30 and the super capacitor 40 from taking too long to cause the self-discharge of the super capacitor 40 to cause the battery pack 30 As a result of adverse effects and damage, the power supply performance of the battery is improved and the service life of the battery is prolonged. In addition, because the supercapacitor 40 is easy to self-discharge, the supercapacitor 40 cannot be pre-charged for use. The present invention allows the supercapacitor 40 to be electrically connected to the battery pack 30 only before the actual use time point. For charging and use, it can prevent the power of the battery pack 30 from being charged to the super capacitor 40 when the vehicle is not in use, resulting in waste of battery power. Therefore, in summary, the present invention proposes a feasible solution to the problems that vehicles have in the application of supercapacitors.

The foregoing descriptions are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the essential technical content of the present invention. The broadest concept of the present invention is defined in the scope of the following patent applications. If any product or technical method completed by another person is exactly the same as defined in the scope of the following patent application, or is an equivalent change, it will be deemed to be covered by the patent scope of the present invention.

10: Vehicle 20: Starting motor 21: Motor switch 30: Battery pack 40: Super capacitor 50: Power system 100: Control device for electrical connection between battery and super capacitor of the present invention 110: Control unit 120: Operation state detection unit 130 : Switch 140: Boost converter circuit 141: Transistor switch 142: Inductor 143: Diode 144: Capacitor 151: First voltage sensing module 152: Second voltage sensing module 200: Input and output control unit BOOST: Boost enable signal SW: Switch signal

Figure 1 is an application schematic diagram showing the application of the electrical connection control device between the battery and supercapacitor of the present invention integrated into a vehicle; Figure 2 is a schematic diagram showing the structure of the present invention battery and supercapacitor The architecture of an embodiment of the device for controlling the electrical connection between the battery and the supercapacitor; Figure 3 is a flowchart showing the steps of the procedure performed by the device for controlling the electrical connection between the battery and the supercapacitor of the present invention; Figure 4 is a waveform diagram , Used to display the output voltage of the battery pack at the moment when the starter motor is started to start the output voltage waveform change.

20: Start the motor

21: Motor switch

30: battery pack

40: Super capacitor

100: The electrical connection control device between the battery and the super capacitor of the present invention

110: control unit

120: Operation status detection unit

130: switch

140: Boost converter circuit

141: Transistor Switch

142: Inductor

143: Diode

144: Capacitor

151: The first voltage sensing module

152: The second voltage sensing module

200: Input and output control unit

BOOST: Boost enable signal

SW: Switch signal

Claims (15)

A method for controlling the electrical connection between a vehicle battery and a super capacitor can be applied to a vehicle, wherein the vehicle is driven by a starter motor, and the starter motor uses a battery pack and a super capacitor to supply power for control The time point of the electrical connection between the battery pack and the super capacitor; the method for controlling the electrical connection between the battery of the vehicle and the super capacitor includes the following steps: (1) At the time point when the vehicle is switched to a pre-activated state, Connect the battery pack to the super capacitor to make the battery pack charge the super capacitor; (2) At the time point when the starter motor is started, the super capacitor is made to provide a momentary high current to the starter motor, by This acceleration drives the initial start-up operation of the starter motor; (3) during the travel of the vehicle, the battery pack is kept in parallel to the super capacitor, thereby providing a steady-state fixed voltage to the power system of the vehicle; and When the power system has an excessive load, the super capacitor is made to provide a large current to the power system for an instant; and (4) when the vehicle is switched to a stopped state, the battery pack and the super Electrical connection between capacitors. For example, the method for controlling the electrical connection between the vehicle battery and the supercapacitor in claim 1, wherein the pre-activated state refers to the time point when the vehicle receives an unlock signal sent by a remote control to which it belongs. For example, the method for controlling the electrical connection between the vehicle battery and the supercapacitor in claim 1, wherein the pre-activated state refers to the point in time when a key belonging to the vehicle is inserted into a key switch on the vehicle. For example, the electrical connection control method between the vehicle battery and the supercapacitor of claim 1, wherein the pre-activated state refers to the point in time when the no-load voltage of the battery pack drops instantaneously after the starter motor is started to produce a predetermined voltage difference . For example, the method for controlling the electrical connection between the vehicle battery and the super capacitor in claim 1 further includes the steps of sensing the battery voltage value currently output by the battery pack and the current capacitor voltage value of the super capacitor and comparing the voltage values of the two; if If the battery voltage value is greater than the capacitor voltage value, the battery pack is directly charged to the super capacitor; if the battery voltage value is less than the capacitor voltage value, a boost conversion function is activated, so that the battery pack can charge the super capacitor. The capacitor is charged. An electrical connection control device between a vehicle battery and a super capacitor can be applied to a vehicle, wherein the vehicle is driven by a starter motor, and the starter motor uses a battery pack and a super capacitor to supply power for control The time point of the electrical connection between the battery and the super capacitor; the control device for the electrical connection between the vehicle battery and the super capacitor includes: (a) a control unit that can be used to provide a set of control functions; (b) an operation The state detection unit can detect the operating state of the vehicle, and send out a capacitor connection enable signal when it detects that the vehicle is switched to a pre-activated state; and when it detects that the vehicle is switched to At the time when the driving state is stopped, a capacitor cut-off enable signal is issued; (c) A switch is set between the battery pack and the super capacitor, and can be switched to the on state when the The battery pack is connected to the super capacitor, and its switching state is controlled by the control unit; (d) a boost converter circuit is connected between the battery pack and the super capacitor, and its startup state is controlled by The control unit; (e) a first voltage sensing module and a second voltage sensing module, wherein the first voltage sensing module is used to sense the battery voltage value currently output by the battery pack, and The second voltage sensing module is used to sense the current capacitor voltage value of the super capacitor for the control unit to compare the battery voltage value with the capacitor voltage value; if the battery voltage value is greater than the capacitor voltage, then So that the battery pack is directly connected to the super capacitor If the battery voltage value is less than the capacitor voltage, the boost converter circuit is activated, and the battery pack charges the super capacitor through the boost converter circuit. For example, the electrical connection control device between the vehicle battery and the supercapacitor in claim 6, wherein the pre-activated state refers to the time point when the vehicle receives an unlock signal sent by a remote control to which it belongs. For example, the electrical connection control device between the vehicle battery and the supercapacitor in claim 6, wherein the pre-activated state refers to the time point when a key belonging to the vehicle is inserted into a key switch on the vehicle. For example, the electrical connection control device between the vehicle battery and the supercapacitor of claim 6, wherein the pre-activated state refers to the point in time at which the no-load voltage of the battery pack drops instantaneously after the starter motor is started to produce a predetermined voltage difference . For example, the electrical connection control device between the vehicle battery and the super capacitor in claim 6, wherein the switch is one of a relay, a solid state relay, or an electronic switch. For example, the electrical connection control device between the vehicle battery and the super capacitor in claim 6, wherein the control unit is an embedded microprocessor. For example, the electrical connection control device between the vehicle battery and the super capacitor in claim 6, wherein the control unit is a programmable logic circuit, and its available types include special application integrated circuits, on-site programmable logic gate arrays, and programmable logic gate arrays. Programmable logic device, programmable logic array, and programmable array logic. For example, the electrical connection control device between the vehicle battery and the supercapacitor in claim 6 further includes an input and output control unit, thereby externally connecting to a keyboard, a screen display, and a wireless network system. For example, the electrical connection control device between the vehicle battery and the super capacitor of claim 6, wherein, at the time point when the vehicle is switched to a pre-activated state, the control unit causes the switch to switch To the path state, thereby connecting the battery pack to the super capacitor, and allowing the battery pack to charge the super capacitor; at the time when the vehicle is traveling, the control unit keeps the battery pack in parallel to the super capacitor, In this way, a steady-state fixed voltage is provided to the electric system of the vehicle; and when the electric system has an excessive load, the super capacitor is made to provide an instantaneous large current to the electric system; when the vehicle is switched to a stop At the time of the state, the control unit switches the switch to the open state, thereby cutting off the electrical connection between the battery pack and the super capacitor. For example, the electrical connection control device between the vehicle battery and the super capacitor in claim 6, wherein the capacity of the super capacitor is greater than 0.1 farad.

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