CN211653498U

CN211653498U - Control circuit of double-circuit DC-DC start-stop voltage stabilizer for vehicle

Info

Publication number: CN211653498U
Application number: CN202020824135.0U
Authority: CN
Inventors: 杨亚峰
Original assignee: Shanghai Fengtian Electronics Co ltd
Current assignee: Shanghai Fengtian Electronics Co ltd
Priority date: 2020-05-17
Filing date: 2020-05-17
Publication date: 2020-10-09
Anticipated expiration: 2030-05-17

Abstract

The utility model relates to the technical field of automotive electronics products, specifically disclose a car with double-circuit DC-DC opens and stops stabiliser control circuit, including singlechip, first opening and stopping voltage stabilizing circuit, second opening and stopping voltage stabilizing circuit and stabiliser, two way open and stop voltage stabilizing circuit and singlechip interconnect; the first start-stop voltage stabilizing circuit consists of a first bypass circuit module and a first voltage stabilizing circuit module, and the second start-stop voltage stabilizing circuit consists of a second bypass circuit module and a second voltage stabilizing circuit module; the two paths of start-stop voltage stabilizing circuits are used for respectively getting power from the automobile storage battery through a FUSE FUSE1 and a FUSE FUSE3, and the two paths of start-stop voltage stabilizing circuits are used for respectively supplying power to the corresponding first electric appliance and the second electric appliance through the FUSE FUSE2 and the FUSE FUSE 4; the single chip microcomputer is powered by a voltage stabilizer, and the voltage stabilizer respectively gets power from the output ends of the two paths of start-stop voltage stabilizing circuits; the utility model discloses can effective control two way DC-DC open stop the stabiliser autonomous working and each other do not influence, can also show the total design cost who reduces the product circuit.

Description

Control circuit of double-circuit DC-DC start-stop voltage stabilizer for vehicle

Technical Field

The utility model relates to an automotive electronics product technology field specifically is an automobile-used double-circuit DC-DC opens and stops stabiliser control circuit.

Background

In order to meet the increasingly stringent tail gas emission standard of the country and respond to the call of energy conservation and emission reduction of the country, the middle-high-end domestic cars of most host plants are standard-equipped with an automatic start-stop function at present. The vehicle that contains automatic start-stop function compares general vehicle difference and has increased a complete set and can the automatic scheme of opening of intelligent control vehicle engine, is applicable to very much the city road conditions that have frequent traffic lights: when the red light is on, the vehicle is continuously braked until the vehicle is static and continues for a period of time, the engine can be automatically closed so as to achieve zero emission of tail gas and zero oil consumption, and at the moment, electric appliances in the vehicle maintain power supply for a short time by means of a vehicle battery; when the green light is on, the engine automatically starts to work again. However, this solution has two problems: firstly, the service life of the engine is frequently started and stopped; secondly, in the process of each hot start of the vehicle, the 12V power supply voltage of the automobile battery can generate transient low voltage (7V/1S) due to transient ignition start, which can cause the restart of part of vehicle-mounted electrical appliances, such as restart interruption of a sound receiver signal, navigation splash screen or restart, and the like, and even influence the normal work of a key controller of the vehicle. The first problem is that the vehicle engine with the start-stop function is generally solved by selecting the engine with the start-stop frequency of more than 30 ten thousand times, and the second problem is solved by serially connecting a start-stop voltage-stabilizing power supply between the automobile storage battery and the vehicle-mounted electrical appliance, so that the 12V direct-current power supply voltage of the automobile storage battery is stabilized in the process of hot start.

With the sale price of the vehicle being lower and the configuration being higher and higher, in the process of vehicle hot start, the vehicle-mounted electric appliances needing voltage stabilization are more and the power requirement is larger and more. For a single high-power vehicle-mounted electric appliance, the voltage stabilizing circuit of the start-stop voltage stabilizing power supply can adopt a two-path or multi-path staggered working mode to solve the problem of high power; however, the reason why the voltage stabilization required power of the vehicle-mounted electrical appliance is increased under the common conditions is that a plurality of electrical appliances on the vehicle are powered by the start-stop voltage stabilization power supply in parallel, such as a liquid crystal instrument, a navigation screen, a video entertainment system, a TCU (transmission control unit) or an EMS (energy management system) and other key controllers, and because the functions, types and safety levels of the electrical appliances are different, a plurality of paths of completely independent start-stop voltage stabilization power supply circuits are required to be designed at the same time, so that the plurality of paths of voltage. This patent has mainly set forth a control circuit that independent double-circuit stopped voltage stabilizing circuit, and this control circuit can effectively control two way completely independent stop voltage stabilizing circuit and carry out steady voltage work in step and do not influence each other, can show the total design cost that reduces the product circuit.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an automobile-used double-circuit DC-DC opens and stops stabiliser control circuit to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a control circuit of a double-circuit DC-DC start-stop voltage stabilizer for a vehicle comprises a single chip microcomputer, a first start-stop voltage stabilizing circuit, a second start-stop voltage stabilizing circuit and a voltage stabilizer, wherein the two start-stop voltage stabilizing circuits are connected with the single chip microcomputer and are grounded; the first start-stop voltage stabilizing circuit consists of a first bypass circuit module and a first voltage stabilizing circuit module, and the second start-stop voltage stabilizing circuit consists of a second bypass circuit module and a second voltage stabilizing circuit module; the two paths of start-stop voltage stabilizing circuits are used for respectively getting power from the automobile storage battery through a FUSE FUSE1 and a FUSE FUSE3, and the two paths of start-stop voltage stabilizing circuits are used for respectively supplying power to the corresponding first electric appliance and the second electric appliance through the FUSE FUSE2 and the FUSE FUSE 4; the single chip microcomputer is powered by a voltage stabilizer, and the voltage stabilizer respectively gets power from the output ends of the two paths of start-stop voltage stabilizing circuits; the single chip microcomputer is connected with an ignition signal receiving module.

Preferably, the type of the single chip microcomputer is S9S12G48F1 VLC.

Preferably, an input1 voltage sampling end and an input2 voltage sampling end of the single chip microcomputer are respectively connected with input ends of the first start-stop voltage stabilizing circuit and the second start-stop voltage stabilizing circuit, a resistor R1 and a resistor R2 are arranged in an input1 voltage sampling end circuit, and a resistor R5 and a resistor R6 are arranged in an input2 voltage sampling end circuit.

Preferably, an output1 voltage sampling end and an output2 voltage sampling end of the single chip microcomputer are respectively connected with output ends of the first start-stop voltage stabilizing circuit and the second start-stop voltage stabilizing circuit, a resistor R3 and a resistor R4 are arranged in an output1 voltage sampling end circuit, and a resistor R7 and a resistor R8 are arranged in an output2 voltage sampling end circuit.

Preferably, the EN1 enable signal, the EN2 enable signal, the EN3 enable signal, and the EN4 enable signal of the single chip microcomputer are respectively connected with the first bypass circuit module, the first voltage regulator circuit module assembly, the second bypass circuit module, and the second voltage regulator circuit module; the ISG end of the single chip microcomputer is connected with the ignition signal receiving module, and the VCC end of the single chip microcomputer is connected with the voltage stabilizer.

Preferably, a diode D1 and a diode D2 are respectively arranged between the voltage stabilizer and the two sets of start-stop voltage stabilizing circuits.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a singlechip stabiliser power supply circuit design is opened from two tunnel through the diode respectively and is stopped voltage stabilizing circuit and get the electricity to guarantee two tunnel open and stop stabiliser work and do not influence each other; when the fuse of one circuit breaks down and is broken, the other circuit can still ensure the normal power supply of the singlechip; the two paths of DC-DC start-stop voltage stabilizers can be effectively controlled to work independently and not affect each other, and the total design cost of a product circuit can be obviously reduced.

Drawings

Fig. 1 is a schematic structural view of the present invention;

reference numbers in the figures: 1. a single chip microcomputer; 2. a first bypass circuit block; 3. a first voltage stabilizing circuit module; 4. a second bypass circuit module; 5. a second voltage stabilizing circuit module; 6. a voltage regulator; 7. an ignition signal receiving module; 8. an automotive battery; 9. a first electrical appliance; 10. a second appliance.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution: a double-circuit DC-DC start-stop voltage stabilizer control circuit for a vehicle comprises a single chip microcomputer 1, a first start-stop voltage stabilizing circuit, a second start-stop voltage stabilizing circuit and a voltage stabilizer 6, wherein the two start-stop voltage stabilizing circuits are connected with the single chip microcomputer 1 and are grounded; the first start-stop voltage stabilizing circuit consists of a first bypass circuit module 2 and a first voltage stabilizing circuit module 3, and the second start-stop voltage stabilizing circuit consists of a second bypass circuit module 4 and a second voltage stabilizing circuit module 5; the two paths of start-stop voltage stabilizing circuits are used for respectively getting power from the automobile storage battery 8 through a FUSE FUSE1 and a FUSE FUSE3, and the two paths of start-stop voltage stabilizing circuits are used for respectively supplying power to the corresponding first electric appliance 9 and the corresponding second electric appliance 10 through a FUSE FUSE2 and a FUSE FUSE 4; the single chip microcomputer 1 is powered by a voltage stabilizer 6, and the voltage stabilizer 6 respectively gets electricity from the output ends of the two paths of start-stop voltage stabilizing circuits; the single chip microcomputer 1 is connected with an ignition signal receiving module 7.

Further, the model of the single chip microcomputer 1 is S9S12G48F1 VLC.

Further, an input1 voltage sampling end and an input2 voltage sampling end of the single chip microcomputer 1 are connected with input ends of the first start-stop voltage stabilizing circuit and the second start-stop voltage stabilizing circuit respectively, a resistor R1 and a resistor R2 are arranged in an input1 voltage sampling end circuit, and a resistor R5 and a resistor R6 are arranged in an input2 voltage sampling end circuit.

Further, an output1 voltage sampling end and an output2 voltage sampling end of the single chip microcomputer 1 are respectively connected with output ends of the first start-stop voltage stabilizing circuit and the second start-stop voltage stabilizing circuit, a resistor R3 and a resistor R4 are arranged in an output1 voltage sampling end circuit, and a resistor R7 and a resistor R8 are arranged in an output2 voltage sampling end circuit.

Further, an EN1 enable signal, an EN2 enable signal, an EN3 enable signal, and an EN4 enable signal of the single chip microcomputer 1 are respectively connected to the first bypass circuit module 2, the first voltage regulator circuit module 3, the second bypass circuit module 4, and the second voltage regulator circuit module 5; the ISG end of the single chip microcomputer 1 is connected with the ignition signal receiving module 7, and the VCC end of the single chip microcomputer 1 is connected with the voltage stabilizer 6.

Further, a diode D1 and a diode D2 are respectively arranged between the voltage stabilizer 6 and the two sets of start-stop voltage stabilizing circuits.

The working principle is as follows: the input power supply of the two paths of start-stop voltage stabilizing circuits is respectively supplied with electricity from the automobile storage battery 8 through FUSEs FUSE1 and FUSE3, and the output of the two paths of start-stop voltage stabilizing circuits is respectively supplied with power to the corresponding first electric appliance 9 and second electric appliance 10 on the automobile through FUSEs FUSE2 and FUSE 4. The two paths of start-stop voltage stabilizer circuits are grounded and share one single chip microcomputer 1 for control, and independent voltage sampling and output enabling control are carried out.

The ignition signal receiving module 7 detects an ignition signal sent by the whole vehicle and sends the ignition signal to the single chip microcomputer 1, and after the single chip microcomputer 1 judges that respective input voltages meet the working voltage range of 6-16V through an input1 voltage sampling end and an input2 voltage sampling end, the single chip microcomputer 1 respectively sends EN1, EN2, EN3 and EN4 enabling signals to control the corresponding bypass circuit module and voltage stabilizing circuit module to work. The EN1 enable signal is responsible for turning off the first bypass circuit module 2, the EN2 enable signal is responsible for turning on the first voltage regulator circuit module 3, the EN3 enable signal is responsible for turning off the second bypass circuit module 4, and the EN4 enable signal is responsible for turning on the second voltage regulator circuit module 5. When the single chip microcomputer 1 detects that the voltage sampling end of output1 and the voltage sampling end of output2 continuously reach 12V regulated voltage respectively, and the corresponding voltage sampling end of input1 and the voltage sampling end of input2 are controlled to close the corresponding voltage stabilizing circuit modules from the power failure of the initial hot start pulse to the recovery of the normal 12V power supply voltage, the EN2 and the EN4 are controlled to close the corresponding voltage stabilizing circuit modules, and meanwhile, the EN1 and the EN3 are controlled to recover the normal operation of the corresponding bypass circuit modules.

The voltage stabilizer 6 of the single chip microcomputer 1 is designed to take power from the output ends of the two paths of start-stop voltage stabilizing circuits through a diode D1 and a diode D2 respectively, so that the two paths of start-stop voltage stabilizing circuits are guaranteed to work without influencing each other; for example, when the FUSE1 is open due to overcurrent, the voltage regulator 6 of the single chip microcomputer 1 can still get power from the other output end through the diode D2, and normal power supply of the single chip microcomputer 1 is ensured, and normal operation of the other path of start-stop voltage regulator can be ensured without being affected. Similarly, when the FUSE2 is open due to overcurrent, the voltage stabilizer 6 of the single chip microcomputer 1 can still get power from the other output end through the diode D1, and normal power supply of the single chip microcomputer 1 is ensured.

The utility model discloses automobile-used double-circuit DC-DC opens and stops stabiliser control circuit is to having control circuit's further improvement, can two tunnel independent open stop voltage stabilizing circuit and carry out steady voltage work and each other not influence by effective control to can show the total design cost who reduces the product circuit.

Certainly, to the product in each field, need realize that the double-circuit independently opens the occasion of stopping steady voltage control circuit, all can use the utility model provides a control circuit scheme as long as its circuit structure is similar, and principle and function are the same, all in the protection scope of this patent, no longer describe herein.

Namely, the utility model discloses automobile-used double-circuit DC-DC opens and stops stabiliser control circuit, can effectively control two way independent voltage stabilizing circuit and carry out steady voltage work in step and each other do not influence, can show the total design cost who reduces the product circuit.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a car is with double-circuit DC-DC start-stop voltage stabilizer control circuit which characterized in that: the single-chip microcomputer (1) is connected with the first start-stop voltage stabilizing circuit, the second start-stop voltage stabilizing circuit and the voltage stabilizer (6), and the two start-stop voltage stabilizing circuits are connected with the single-chip microcomputer (1) in a common ground mode; the first start-stop voltage stabilizing circuit consists of a first bypass circuit module (2) and a first voltage stabilizing circuit module (3), and the second start-stop voltage stabilizing circuit consists of a second bypass circuit module (4) and a second voltage stabilizing circuit module (5); the two paths of start-stop voltage stabilizing circuits respectively get electricity from the automobile storage battery (8) through a FUSE FUSE1 and a FUSE FUSE3, and supply power to the corresponding first electric appliance (9) and second electric appliance (10) through a FUSE FUSE2 and a FUSE FUSE 4; the single chip microcomputer (1) supplies power through a voltage stabilizer (6), and the voltage stabilizer (6) respectively gets power from the output ends of the two paths of start-stop voltage stabilizing circuits; the single chip microcomputer (1) is connected with an ignition signal receiving module (7).

2. The vehicular double-circuit DC-DC start-stop voltage stabilizer control circuit according to claim 1, characterized in that: the type of the single chip microcomputer (1) is S9S12G48F1 VLC.

3. The vehicular double-circuit DC-DC start-stop voltage stabilizer control circuit according to claim 1, characterized in that: an input1 voltage sampling end and an input2 voltage sampling end of the single chip microcomputer (1) are respectively connected with input ends of the first start-stop voltage stabilizing circuit and the second start-stop voltage stabilizing circuit, a resistor R1 and a resistor R2 are arranged in an input1 voltage sampling end circuit, and a resistor R5 and a resistor R6 are arranged in an input2 voltage sampling end circuit.

4. The vehicular double-circuit DC-DC start-stop voltage stabilizer control circuit according to claim 1, characterized in that: an output1 voltage sampling end and an output2 voltage sampling end of the single chip microcomputer (1) are respectively connected with output ends of the first start-stop voltage stabilizing circuit and the second start-stop voltage stabilizing circuit, a resistor R3 and a resistor R4 are arranged in an output1 voltage sampling end circuit, and a resistor R7 and a resistor R8 are arranged in an output2 voltage sampling end circuit.

5. The vehicular double-circuit DC-DC start-stop voltage stabilizer control circuit according to claim 1, characterized in that: the EN1 enabling signal, the EN2 enabling signal, the EN3 enabling signal and the EN4 enabling signal of the single chip microcomputer (1) are respectively connected with the first bypass circuit module (2), the first voltage stabilizing circuit module (3), the second bypass circuit module (4) and the second voltage stabilizing circuit module (5); the ISG end of the single chip microcomputer (1) is connected with the ignition signal receiving module (7), and the VCC end of the single chip microcomputer (1) is connected with the voltage stabilizer (6).

6. The vehicular double-circuit DC-DC start-stop voltage stabilizer control circuit according to claim 1, characterized in that: and a diode D1 and a diode D2 are respectively arranged between the voltage stabilizer (6) and the two groups of start-stop voltage stabilizing circuits.