CN109936206A - Super capacitor balance circuit and vehicle electronic equipment - Google Patents

Abstract

The invention discloses a kind of super capacitor balancing circuitry and vehicle electronic device, which includes bleeder circuit, amplifier, the first super capacitor and the second super capacitor；The input terminal of bleeder circuit connects power supply；The reverse input end of amplifier is shorted the output end of amplifier；One end of first super capacitor connects power supply, and the other end connects one end of the second super capacitor, the other end ground connection of the second super capacitor；The output end of amplifier connects the first potential point between the first super capacitor and the second super capacitor, so that the voltage value of the voltage value at the first super capacitor both ends, the second super capacitor both ends is equal；One end of first super capacitor is also used to be connected to load and thinks load supplying.Technical solution of the present invention solves the problems, such as Voltage unbalance between series capacitance by the short theory of void of two input terminals of amplifier, reduces power supply trouble, improves the service life of capacity cell.

Description

Super capacitor balance circuit and vehicle electronic equipment

technical field

The invention relates to the technical field of on-board electronic equipment, in particular to a supercapacitor balancing circuit and on-board electronic equipment.

Background technique

With the development of the automobile industry, the number of automobiles has gradually increased, and the problem of automobile driving safety has become more and more serious.

In vehicle-mounted electronic equipment, in order to solve the problem that the vehicle-mounted electronic equipment cannot work normally due to the sudden power failure of the car under abnormal conditions, designing supercapacitors in the vehicle-mounted electronic equipment has become a necessary option.

In order to increase the voltage, two supercapacitors are often connected in series in automotive electronic equipment. However, due to the difference in the capacity and insulation resistance of their respective components, the voltage applied to each supercapacitor is sometimes unbalanced, and the voltage applied to a single supercapacitor will become higher, once it exceeds the maximum allowable voltage of the supercapacitor value, may cause the supercapacitor to malfunction. In addition, the voltage difference between each supercapacitor will also shorten the product life of each supercapacitor, which will lead to the problem that the on-board electronic equipment cannot work normally.

SUMMARY OF THE INVENTION

In view of the above problems, the present invention proposes a supercapacitor balancing circuit and a vehicle-mounted electronic device to solve the deficiencies of the prior art.

An embodiment of the present invention provides a supercapacitor balancing circuit, including a voltage divider circuit, an amplifier, a first supercapacitor and a second supercapacitor, wherein the first supercapacitor and the second supercapacitor are the same;

The input end of the voltage divider circuit is connected to the power supply, and is used for performing voltage division processing on the power supply voltage input from the power supply source and sending the power supply voltage after the voltage division processing to the non-inverting input terminal of the amplifier;

The inverting input terminal of the amplifier is short-circuited with the output terminal of the amplifier, so that the voltage value output by the output terminal is equal to the power supply voltage after the voltage division process;

One end of the first super capacitor is connected to the power supply, the other end is connected to one end of the second super capacitor, and the other end of the second super capacitor is grounded;

The output end of the amplifier is connected to the first potential point between the first supercapacitor and the second supercapacitor, so that the voltage value across the first supercapacitor and the voltage across the second supercapacitor value is equal;

The one end of the first super capacitor is also used for connecting to a load to supply power to the load.

Further, the voltage dividing circuit includes a first resistor and a second resistor, wherein the resistance value of the first resistor is equal to the resistance value of the second resistor;

One end of the first resistor is connected to the power supply, the other end is connected to one end of the second resistor, and the other end of the second resistor is grounded;

A second potential point between the first resistor and the second resistor is connected to the non-inverting input terminal.

Further, the supercapacitor balancing circuit according to the embodiment of the present invention further includes a third resistor and a fourth resistor, wherein the resistance value of the third resistor is equal to the resistance value of the fourth resistor;

the third resistor is connected in parallel with both ends of the first super capacitor;

The fourth resistor is connected in parallel with two ends of the second super capacitor.

Further, the super capacitor balancing circuit according to the embodiment of the present invention further includes a third capacitor;

One end of the third capacitor is connected to the one end of the first super capacitor, and the other end is connected to the other end of the second super capacitor.

Further, the amplifier adopts SGM8041 chip, the Vin+ pin of the SGM8041 chip is connected to the second potential point, the Vin- pin is shorted to the Vout pin, and the Vout pin is connected to the first potential point, Vs+ The pin is connected to the external chip power supply; the Vs-pin is grounded.

Further, the super capacitor balancing circuit according to the embodiment of the present invention further includes a fourth capacitor;

One end of the fourth capacitor is connected to the external chip power supply, and the other end is grounded.

Further, the super capacitor balancing circuit according to the embodiment of the present invention further includes a fifth capacitor;

One end of the fifth capacitor is connected to the second potential point, and the other end is grounded.

Further, the supercapacitor balancing circuit of the embodiment of the present invention further includes a fifth resistor, a sixth resistor and a voltage monitoring circuit;

One end of the fifth resistor is connected to the one end of the first super capacitor, the other end is connected to one end of the sixth resistor, and the other end of the sixth resistor is grounded;

A third potential point between the fifth resistor and the sixth resistor is connected to the voltage monitoring circuit for monitoring the electric quantity of the first supercapacitor and the second supercapacitor.

Further, the supercapacitor balancing circuit according to the embodiment of the present invention further includes a seventh resistor;

One end of the seventh resistor is connected to the power supply, and the other end is connected to the one end of the fourth capacitor

Based on the above-mentioned supercapacitor balancing circuit, an embodiment of the present invention further provides an in-vehicle electronic device, including the above-mentioned supercapacitor balancing circuit;

The technical solution of the present invention can solve the problem of voltage unbalance between series capacitors through the virtual short theory of the two input ends of the amplifier, reduce capacitor faults, improve the product life of capacitive elements, and ensure the normal operation of on-board electronic equipment.

Description of drawings

In order to illustrate the technical solutions of the present invention more clearly, the accompanying drawings required in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be It is regarded as the limitation of the protection scope of the present invention.

1 is a first structural schematic diagram of a supercapacitor balancing circuit according to an embodiment of the present invention;

2 is a second structural schematic diagram of a supercapacitor balancing circuit according to an embodiment of the present invention;

3 is a third structural schematic diagram of a supercapacitor balancing circuit according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a fourth structure of a supercapacitor balancing circuit according to an embodiment of the present invention.

Description of main component symbols:

20-supercapacitor balance circuit; 21-voltage divider circuit; 22-amplifier; 23-power supply; 24-load; 25-voltage monitoring circuit; C1-first supercapacitor; C2-second supercapacitor; C3-third Capacitance; C4- the fourth capacitor; C5- the fifth capacitor; C6- the sixth capacitor; R1- the first resistor; R2- the second resistor; R3- the third resistor; R4- the fourth resistor; R5- the fifth resistor; R6-sixth resistor; R7-seventh resistor; R8-eighth resistor; P1-first potential point; P2-second potential point; P3-third potential point.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations. Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of the present invention, "plurality" means two or more, unless otherwise expressly and specifically defined.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terms used herein in the specification are for the purpose of describing particular embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to solve the problem of sudden power failure in the existing vehicle electronic equipment, capacitive devices (such as super capacitors, electrolytic capacitors, etc.) are often designed. In order to increase the voltage, two capacitors are often connected in series, and the voltage applied to the two capacitors appears. When unbalanced, the technical solution of the present invention can balance the voltage on the lead capacitor according to the virtual short principle of the non-inverting input terminal and the reverse input terminal of the amplifier, so as to improve the product life of the capacitor device and make the vehicle electronic equipment work normally.

The present invention will be described in detail below with reference to specific embodiments.

Example 1

Referring to FIG. 1 , this embodiment provides a supercapacitor balancing circuit 20 , which can be used in vehicle-mounted electronic equipment.

The supercapacitor balancing circuit 20 includes a voltage divider circuit 21, an amplifier 22, and a first supercapacitor C1 and a second supercapacitor C2, wherein the first supercapacitor C1 and the second supercapacitor C2 are the same.

The input end of the voltage divider circuit 21 is connected to the external power supply 23 , the output end of the voltage divider circuit 21 is connected to the non-inverting input end of the amplifier 22 , and the inverting input end of the amplifier 22 is shorted to the amplifier 22 One end of the first super capacitor C1 is connected to the power supply 23, the other end of the first super capacitor C1 is connected to one end of the second super capacitor C2, and the other end of the second super capacitor is grounded; The output end of the amplifier 22 is connected to the first potential point P1 between the first super capacitor C1 and the second super capacitor C2.

Specifically, the voltage dividing circuit 21 is configured to perform voltage dividing processing on the power supply voltage provided by the power supply source 23 to obtain a half power supply voltage, and divide the power supply voltage after the voltage division processing (ie, half A supply voltage) is fed to the non-inverting input of the amplifier 22.

According to the virtual short theory of the forward input terminal and the reverse input terminal of the amplifier 22, the voltage value of the reverse input terminal of the amplifier 22 is equal to the voltage value of the non-inverting input terminal, so the voltage value of the reverse input terminal is also equal to 1/2 of the supply voltage; since the inverting input terminal of the amplifier 22 is short-circuited with the output terminal of the amplifier 22, the voltage value of the output terminal of the amplifier 22 is the same as the voltage value of the inverting input terminal of the amplifier 22. Therefore, the voltage value of the output terminal of the amplifier 22 is also one-half of the supply voltage.

Since the output terminal of the amplifier 22 is connected to the first potential point P1, the voltage value at the first potential point P1 is equal to the voltage value of the output terminal of the amplifier 22, so the voltage at the first potential point P1 The value is also one-half of the power supply voltage. Since the first super capacitor C1 and the second super capacitor C2 are charged by the power supply voltage provided by the power supply 23, it can be understood that the voltage value at both ends of the first super capacitor C1 is also One-half of the power supply voltage, the voltage value across the second supercapacitor C2 is also one-half of the power supply voltage, so the voltage value across the first supercapacitor C1 is the same as the voltage across the second supercapacitor C2. The voltage values are equal to reach equilibrium.

After the voltage value across the first supercapacitor C1 and the voltage across the second supercapacitor C2 reach equilibrium, the fourth voltage between the one end of the first supercapacitor C1 and the power supply 23 The potential point P4 is also used for connecting to a load to supply power to the load, wherein the load and the supercapacitor balancing circuit 20 may be integrated together, or may be independent devices.

In this embodiment, the load may be a driving recorder. In some other embodiments, the load may also be other in-vehicle electronic devices, such as MP3, MP4, and so on.

In this embodiment, the amplifier 22 may use an operational amplifier. In some other embodiments, the amplifier 22 may also adopt other types of amplifiers that can realize the above-mentioned functions.

In this embodiment, as shown in FIG. 2 , the voltage dividing circuit 21 includes a first resistor R1 and a second resistor R2 . One end of the first resistor R1 is connected to the power supply 23, the other end is connected to one end of the second resistor R2, and the other end of the second resistor R2 is grounded; the first resistor R1 and the second resistor R2 The second potential point P2 therebetween is connected to the non-inverting input terminal of the amplifier 22 .

In order for the voltage divider circuit 21 to obtain half the power supply voltage, the resistance value of the first resistor R1 is equal to the resistance value of the second resistor R2.

For example, if the power supply voltage provided by the power supply 23 is 5V, the power supply voltage is divided by the first resistor R1 to obtain a voltage of 2.5V, that is, the voltage of the second potential point P2 is 2.5V, and the voltage of the 2.5V After the second resistor R2 divides the voltage, the voltage is zero, and the grounding treatment is performed.

In some other embodiments, the voltage dividing circuit 21 may also be a three-terminal voltage regulator block or the like.

Further, as shown in FIG. 2, as a solution for stabilizing the voltage across the first supercapacitor C1 and the voltage across the second supercapacitor C2, the supercapacitor balancing circuit 20 also includes a third resistor R3 and a fourth resistor R4. , wherein the resistance value of the third resistor R3 is equal to the resistance value of the fourth resistor R4.

The third resistor R3 is connected in parallel with both ends of the first super capacitor C1, that is, one end of the third resistor R3 is connected to one end of the first super capacitor C1, and the other end of the third resistor R3 is connected to the other end of the first super capacitor C1. the other end of the first super capacitor C1. The fourth resistor R4 is connected in parallel with both ends of the second super capacitor C2, that is, one end of the fourth resistor R4 is connected to one end of the second super capacitor C2, and the other end of the fourth resistor R4 is connected to the other end of the second super capacitor C2.

The third resistor R3 is used to suppress the leakage current of the first supercapacitor C1 to achieve voltage balance between the two ends of the first supercapacitor C1. The fourth resistor R4 is used for suppressing the leakage current of the second super capacitor C2 to achieve voltage balance between the two ends of the second super capacitor C2.

Further, as shown in FIG. 3 , as a solution for stabilizing the voltage across the first supercapacitor C1 and the voltage across the second supercapacitor C2 for filtering, the supercapacitor balancing circuit 20 further includes a third capacitor C3 .

One end of the third capacitor C3 is connected to the one end of the first super capacitor C1, and the other end of the first super capacitor C1 is connected to one end of the second super capacitor C2. The other end is connected to the other end of the third capacitor C3, and the third capacitor C3 is used to make the voltage across the first super capacitor C1 and the second super capacitor C2 more stable.

Further, the amplifier 22 adopts the SGM8041 chip, and the chip SGM8041 includes five pins:

The first pin: the output Vout pin;

The second pin: the negative end of the power supply Vs-pin;

The third pin: the non-inverting input Vin+ pin;

The fourth pin: the reverse input Vin- pin;

The fifth pin: the positive terminal of the power supply Vs+ pin.

Specifically, as shown in FIG. 4 , the Vin+ pin of the SGM8041 chip is connected to the second potential point P2, the Vin- pin is shorted to the Vout pin, and the Vout pin is connected to the first potential point P1, The Vs+ pin is connected to the external chip power supply; the Vs- pin is grounded.

Further, as shown in FIG. 4 , the super capacitor balancing circuit 20 further includes a fourth capacitor C4, the external chip power supply is connected to one end of the fourth capacitor C4, and the other end of the fourth capacitor C4 is grounded , the fourth capacitor C4 is used to perform a filtering function to make the voltage provided by the external chip power supply more stable.

Further, as shown in FIG. 4 , the supercapacitor balancing circuit 20 further includes a fifth capacitor C5, one end of the fifth capacitor C5 is connected to the second potential point P2, and the other end is grounded, and the fifth capacitor C5 is used for It is more stable for the voltage value at the second potential point P2.

Further, as shown in FIG. 4 , the super capacitor balance circuit 20 further includes a fifth resistor R5 and a sixth resistor R6 and a voltage monitoring circuit 25 .

One end of the fifth resistor R5 is connected to the power supply 23 and one end of the first super capacitor C1; the other end of the fifth resistor R5 is connected to one end of the sixth resistor R6, and the sixth The other end of resistor R6 is connected to ground. The fifth resistor R5 and the sixth resistor R6 are used to perform a voltage dividing function.

The third potential point P3 between the fifth resistor R5 and the sixth resistor R6 is connected to the voltage monitoring circuit 25 , so that the voltage monitoring circuit 25 monitors the power of the first super capacitor C1 and the second super capacitor C2 .

For example, the voltage monitoring circuit 25 is configured to determine whether the first super capacitor C1 and the second super capacitor C2 are fully charged according to the power supply voltage provided by the power supply. The voltage values across the two supercapacitors C2 are compared with the voltage values of the supply voltage. If the voltage values across the first supercapacitor C1 and the second supercapacitor C2 are equal to the voltage values of the supply voltage, then the first supercapacitor C1 and the second supercapacitor C2 are equal to the voltage value of the supply voltage. The two supercapacitors C2 are fully charged; if the voltage across the first supercapacitor C1 and the second supercapacitor C2 is less than the voltage value of the supply voltage, the first supercapacitor C1 and the second supercapacitor C2 are not fully charged.

In this embodiment, the voltage monitoring circuit 25 may use an RT9801AGE chip. In some other embodiments, the voltage monitoring circuit 25 may also use other chips such as PT8A610x.

Further, as shown in FIG. 4 , the supercapacitor balancing circuit 20 further includes a seventh resistor R7, the power supply is connected to one end of the seventh resistor R7, and the other end of the seventh resistor R7 is connected to the fourth resistor R7. One end of capacitor C4.

Specifically, the power supply voltage provided by the power supply 23 may also be filtered through the fourth capacitor C4 to make the power supply voltage provided by the power supply 23 more stable.

4 as an example, assuming that the interface corresponding to the power supply 23 is VBAT, and the interface corresponding to the external chip power supply is PWBC_VBAT, if the power supply voltage provided by VBAT is 5V, the first resistor R1 and the second resistor R2 are the same.

The positive terminal Vs+ pin of the power supply of the SGM8041 chip is connected to one end of the eighth resistor R8, and the other end of the eighth resistor R8 is connected to the interface PWBC_VBAT of the external chip power supply. The eighth resistor R8 is a voltage divider resistor. Further, the The resistance value of the eighth resistor R8 may be 0 ohms, that is, no voltage division processing is performed on the external chip voltage provided by the interface of the external chip power supply. If the voltage provided by PWBC_VBAT is 5V, the voltage connected to the Vs+ pin is also 5V. One end of the eighth resistor R8 is also connected to one end of a fourth capacitor C4, the other end of the fourth capacitor C4 is grounded, and the fourth capacitor C4 is used to make the external chip voltage more stable. The negative terminal Vs-pin of the power supply of the SGM8041 chip is grounded.

The supply voltage 5V provided by VBAT is divided by the first resistor R1 to obtain a first voltage of 2.5V, and the first voltage of 2.5V is divided by the second resistor R2 to obtain a second voltage of 0V, which is grounded. The VBAT is also connected to one end of a seventh resistor R7, and the other end of the seventh resistor R7 is connected to one end of the fourth capacitor C4. Further, the resistance value of the seventh resistor R7 may be 0 ohms, and the power supply provided by the VBAT The voltage is connected to the fourth capacitor C4 through the seventh resistor R7 to make the power supply voltage more stable. The power supply voltage provided by the VBAT can also be connected to the Vs+ terminal through the seventh resistor R7 to provide the SGM8041 chip. Operating Voltage.

It can be understood that the voltage at the second potential point P2 is the first voltage 2.5V. The first voltage 2.5V is sent to the non-inverting input terminal of the SGM8041 chip, the voltage at the Vin+ pin is 2.5V, and one end of the Vin- pin of the reverse input terminal is shorted to the output terminal Vout pin, according to the virtual short of the amplifier Theoretically, the third voltage of the Vin- pin of the inverting input terminal is also 2.5V, the fourth voltage of the Vout pin of the output terminal is also 2.5V, the Vin- pin of the inverting input terminal and the Vout pin of the output terminal One end of the sixth capacitor C6 is also connected respectively, the other end of the sixth capacitor C6 is grounded, and the sixth capacitor C6 is used for filtering the third voltage and the fourth voltage.

The output terminal Vout pin is connected to the first potential point P1, then the fifth voltage at the first potential point P1 is also 2.5V. Since one end of the first super capacitor C1 is connected to VBAT, the power supply voltage provided by the VBAT It can be seen that the sixth voltage at both ends of the first supercapacitor C1 is also 2.5V, and the seventh voltage at both ends of the second supercapacitor C2 is also 2.5V, so that the voltage at both ends of the first supercapacitor C1 can be reached. and the voltages at both ends of the second supercapacitor C2 are equal to reach equilibrium.

One end of the third capacitor C3 is connected to one end of the first super capacitor C1, the other end of the third capacitor C3 is connected to the other end of the second super capacitor C2, and the other end of the third capacitor C3 is also grounded. The third capacitor C3 is used to make the voltage across the first super capacitor C1 and the second super capacitor C2 more stable.

One end of the fifth resistor R5 is respectively connected to the VBAT and the fourth potential point P4 between the first super capacitor C1 and the third capacitor C3, and the other end of the fifth resistor R5 is connected to One end of the sixth resistor R6 and the other end of the sixth resistor R6 are grounded.

The third potential point P3 between the fifth resistor R5 and the sixth resistor R6 is connected to a voltage monitoring circuit 25 , and the voltage monitoring circuit 25 is used for monitoring the power of the first super capacitor C1 and the second super capacitor C2 .

With the supercapacitor balancing circuit 20 of this embodiment, the virtual short theory (also called the voltage follower effect) of the non-inverting input terminal and the inverting input terminal of the amplifier is used to make the inverting input terminal short the output terminal of the amplifier, so that the output terminal is short-circuited. The voltage value of the terminal is equal to the voltage value of the non-inverting input terminal, and the output terminal is further connected to the potential point between the two capacitors in series, so that the voltage values at both ends of the two series capacitors are equal, and the balance is reached. It solves the problem of unbalanced charging, and then solves the problem of power supply of on-board electronic equipment at the moment of sudden power failure, ensuring that on-board electronic equipment can work normally, so as to facilitate the preservation of key videos, and solve the major problems that plague designers.

Based on the supercapacitor balancing circuit 20 of the above-mentioned Embodiment 1, another embodiment of the present invention provides an in-vehicle electronic device, and the in-vehicle electronic device includes the above-mentioned supercapacitor balancing circuit 20 .

It can be understood that the supercapacitor balancing circuit 20 of this embodiment corresponds to the supercapacitor balancing circuit of the foregoing Embodiment 1, and the options of the supercapacitor balancing circuit of the foregoing Embodiment 1 are also applicable to the supercapacitor balancing circuit 20 of this embodiment. Therefore, it will not be described in detail here.

Those skilled in the art can understand that the accompanying drawing is only a schematic diagram of a preferred implementation scenario, and the modules or processes in the accompanying drawing are not necessarily necessary to implement the present invention.

Those skilled in the art can understand that the modules in the device in the implementation scenario may be distributed in the device in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the implementation scenario with corresponding changes. The modules of the above implementation scenarios may be combined into one module, or may be further split into multiple sub-modules.

The above serial numbers of the present invention are only for description, and do not represent the pros and cons of the implementation scenarios. The above disclosures are only a few specific implementation scenarios of the present invention, however, the present invention is not limited thereto, and any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims (10)

1. a kind of super capacitor balancing circuitry, which is characterized in that including bleeder circuit, amplifier, the first super capacitor and second Super capacitor, wherein first super capacitor is identical with second super capacitor；

The input terminal of the bleeder circuit connects power supply, and the supply voltage for will input from power supply carries out from partial pressure Manage and be sent into the supply voltage after voltage division processing the non-inverting input terminal of the amplifier；

The reverse input end of the amplifier is shorted the output end of the amplifier, so that the voltage value etc. of output end output Supply voltage after the voltage division processing；

One end of first super capacitor connects the power supply, and the other end connects one end of second super capacitor, The other end of second super capacitor is grounded；

The output end of the amplifier connects the first potential point between first super capacitor and second super capacitor, So that the voltage value of the voltage value at first super capacitor both ends, second super capacitor both ends is equal；

Described one end of first super capacitor is also used to be connected to load and thinks the load supplying.

2. super capacitor balancing circuitry according to claim 1, which is characterized in that the bleeder circuit includes first resistor And second resistance, wherein the resistance value of the first resistor is equal with the resistance value of the second resistance；

One end of the first resistor connects the power supply, and the other end connects one end of second resistance, the second resistance The other end ground connection；

The second potential point between the first resistor and the second resistance connects the non-inverting input terminal.

3. super capacitor balancing circuitry according to claim 1, which is characterized in that further include 3rd resistor and the 4th electricity Resistance, wherein the resistance value of the 3rd resistor is equal with the resistance value of the 4th resistance；

The 3rd resistor is connected in parallel on the both ends of first super capacitor；

The both ends for being connected in parallel on second super capacitor of 4th resistance.

4. super capacitor balancing circuitry according to claim 1, which is characterized in that further include third capacitor；

One end of the third capacitor connects described one end of first super capacitor, and the other end connects the second super electricity The other end held.

5. super capacitor balancing circuitry according to claim 2, which is characterized in that the amplifier uses SGM8041 core Piece, the Vin+ pin of the SGM8041 chip connect second potential point, and Vin- pin is shorted Vout pin, the Vout Pin connects first potential point, and Vs+ pin connects external chip power supply；Vs- pin ground connection.

6. super capacitor balancing circuitry according to claim 5, which is characterized in that further include the 4th capacitor；

One end of 4th capacitor connects the external chip power supply, other end ground connection.

7. super capacitor balancing circuitry according to claim 5, which is characterized in that further include the 5th capacitor；

One end of 5th capacitor connects second potential point, other end ground connection.

8. super capacitor balancing circuitry according to claim 6, which is characterized in that further include the 5th resistance, the 6th resistance And electric voltage observation circuit；

One end of 5th resistance connects described one end of first super capacitor, and the other end connects the 6th resistance One end, the other end ground connection of the 6th resistance；

Third potential point between 5th resistance and the 6th resistance connects the electric voltage observation circuit, for institute The electricity for stating the first super capacitor and second super capacitor is monitored.

9. super capacitor balancing circuitry according to claim 8, which is characterized in that further include the 7th resistance；

One end of 7th resistance connects the power supply, and the other end connects described one end of the 4th capacitor.

10. a kind of vehicle electronic device, which is characterized in that including the described in any item super capacitor balancing circuitrys of claim 1 to 9.