Active suspension high-power power supply system and automobile

Abstract

The utility model discloses an active suspension high-power power supply system and an automobile, which comprise an active suspension load, a vehicle-mounted power supply, a super capacitor and a charging control unit, the positive electrode and the negative electrode of the vehicle-mounted power supply are connected to the input end of the charging control unit. The output end of the charging control unit is connected to the two ends of the super capacitor so as to charge the super capacitor; two ends of the super capacitor are connected to a power supply positive electrode and a power supply negative electrode of the active suspension load for realizing high-power power supply for the active suspension load. The utility model has the advantages that the low-capacity storage battery is combined with the super capacitor to supply power, so that the requirement of high-power power supply of the active suspension load is met.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of automobile active suspension power supply control, in particular to a kind of active suspension high-power power supply system and automobile. BACKGROUND

[0002] According to the driving condition (the motion state of vehicle and road condition, etc.) of automobile, the stiffness and damping characteristics of suspension system are dynamically self-adaptive adjusted, and then the suspension is called active suspension. Active suspension can improve the passability, smoothness and control stability of vehicle, and is the focus of vehicle research and development. For example, a kind of active suspension system and vehicle with patent application number 202222187720.6, which discloses a shock absorber, a first inlet and outlet and a second inlet and outlet are arranged on the shock absorber and communicate with a restoring cavity and a compression cavity respectively; moreover, a bidirectional electro-hydraulic pump and an adjusting unit are connected in series between the first inlet and outlet and the second inlet and outlet; a control valve group is arranged in the adjusting unit, and the control valve group is used to limit the pressure range of oil conduction between the first inlet and outlet and the second inlet and outlet.

[0003] The peak power of the prior art active suspension system is as high as about 15KW, but the duration is very short, usually not more than 1S, and the average is not more than 300W in daily driving, even if the average power is not more than 1KW in severe road conditions. New energy vehicles often use 400-800V voltage platform, if the voltage platform of active suspension is the same as that of driving motor, there is no problem in energy supply. But some vehicles with internal combustion engine, the 12V power supply system on board is obviously not enough to drive the active suspension, so a 48V power supply system is used, but in order to cover the instantaneous power of up to 15KW, the battery capacity needs to be set relatively large, and using large-capacity battery for a small number of working conditions is obviously not economical, which increases the cost of storage battery, so how to realize the power supply of active suspension load based on small-capacity battery is a technical problem to be solved, and the prior art cannot solve this technical problem. UTILITY MODEL CONTENTS

[0004] The utility model aims at overcoming the shortcomings of prior art, providing a kind of active suspension high-power power supply system and automobile, realize through small-capacity battery combination capacitor to try the high-power power supply of active suspension.

[0005] In order to achieve the above object, the utility model adopts the technical scheme of: a kind of active suspension high-power power supply system, including active suspension load, vehicle-mounted power supply, the power supply system further includes super capacitor, charging control unit;The positive and negative pole of vehicle-mounted power supply is connected to the input end of charging control unit respectively;The output end of charging control unit is connected to the two ends of super capacitor, to realize the charging of super capacitor;The two ends of super capacitor are connected to the power supply positive and negative pole of active suspension load, for realizing the high-power power supply of active suspension load.

[0006] The power supply system further includes a switching unit, which is connected in series between the positive terminal of the vehicle-mounted power supply and the charging control unit or connected in series between the negative terminal of the vehicle-mounted power supply and the charging control unit.

[0007] The switching unit is an ignition switch.

[0008] The charging control unit includes a DC / DC device for boosting the voltage of the vehicle-mounted power supply and charging the super capacitor.

[0009] The vehicle-mounted power supply is a vehicle-mounted storage battery.

[0010] The vehicle-mounted power supply is connected to a vehicle-mounted charger, and the vehicle-mounted charger supplies power to the vehicle-mounted power supply.

[0011] An automobile is provided with the active suspension high-power power supply system.

[0012] The utility model has the advantages that: a low-capacity storage battery is used in combination with a super capacitor for power supply, thereby meeting the demand for high-power power supply of the active suspension load, and the combination of the low-capacity storage battery and the super capacitor for high-power power supply has the advantages of low cost and stability and reliability; the ignition switch is used for access control, so as to ensure that the power of the super capacitor is sufficient to meet the demand of the active suspension load; when the active suspension is working at high power, only the super capacitor is used for power supply, and the vehicle-mounted battery is not affected. BRIEF DESCRIPTION OF DRAWINGS

[0013] The content expressed by each figure in the specification of the utility model and the marks in the figures are briefly described as follows:

[0014] Figure 1 It is a principle schematic view of the active suspension high-power power supply system of the utility model.

[0015] The marks in the above figures are as follows: 1, vehicle-mounted power supply; 2, DC / DC device; 3, super capacitor; 4, active suspension load; 5, ignition switch. DETAILED DESCRIPTION

[0016] The specific embodiments of the present application will be further described in detail with reference to the drawings as follows by describing the optimal embodiments.

[0017] The present embodiment is mainly aimed at the fact that the low-capacity battery of the prior art cannot meet the demand of the 48V active suspension system for instant high-power power supply, and if a high-capacity battery is used, the demand of the active suspension for high power can be met, but the cost will be greatly increased, and since the demand of the active suspension system for high power is only for an instant, not continuous, if a high-power battery is used, it is an uneconomical solution. In order to provide a new solution, the demand of the active suspension system for instant high-power power supply is met, and the low-cost requirement of using a low-capacity battery is met; the solution comprises:

[0018] An active suspension high-power power supply system, comprising an active suspension load, a vehicle-mounted power supply, a super capacitor, and a charging control unit.

[0019] The vehicle-mounted power supply uses a vehicle-mounted battery, which has positive and negative poles, and the positive and negative poles of the vehicle-mounted battery are respectively connected to the input end of the charging control unit; the output end of the charging control unit is connected to the two ends of the super capacitor, so as to realize charging of the super capacitor.

[0020] The charging control unit mainly realizes control of charging of the super capacitor by the vehicle-mounted battery, and uses a boost DC / DC device to realize this. The DC / DC device is a direct-current-to-direct-current electrical device, which can charge the super capacitor after boosting the low-voltage direct current of the vehicle-mounted battery. Therefore, the positive and negative poles of the input end of the DC / DC device are respectively connected to the positive and negative poles of the vehicle-mounted battery; the positive and negative poles of the output end of the DC / DC device are respectively connected to the two ends of the super capacitor, so that the vehicle-mounted battery can charge the super capacitor through the DC / DC device.

[0021] The two ends of the super capacitor are connected to the power supply positive and negative poles of the active suspension load, so as to realize high-power power supply for the active suspension load. The super capacitor has great power density, so it can realize instantaneous high-power output, thereby meeting the demand of the active suspension system load. The load of the active suspension system is generally a motor. The two ends of the super capacitor are the positive and negative poles of the super capacitor, and the positive and negative poles are connected to the positive and negative poles of the motor, thereby realizing the connection of the power supply loop. The super capacitor can supply power to the active suspension load when power supply is needed. The super capacitor after power supply can be charged by the vehicle storage battery, and the super capacitor after charging can continue to supply power to the active load and meet the requirement of instantaneous high-power supply. In order to ensure that the vehicle storage battery has enough power to supply power to the super capacitor, the vehicle storage battery can be connected to the output end of the vehicle on-board charger, the vehicle power supply is connected to the on-board charger, and the on-board charger is used to charge the vehicle power supply. As long as the vehicle is working, the storage battery can be charged, thereby ensuring the reliability of the power of the vehicle storage battery.

[0022] In order to avoid unnecessary power consumption of the vehicle storage battery after parking, a switch unit is arranged on the loop between the positive pole of the vehicle power supply and the charging control unit or on the loop between the negative pole of the vehicle power supply and the charging control unit. The switch unit is a switch that changes according to the ignition state of the vehicle. It can be an ignition switch. Taking the ignition switch as an example, when the ignition switch is connected between the positive pole of the vehicle storage battery and the DCDC device, the ignition switch is closed after the vehicle is started, so that the vehicle storage battery can charge the super capacitor. Otherwise, the ignition switch is opened after the vehicle is turned off, so that the vehicle storage battery cannot charge the super capacitor, thereby ensuring that the vehicle storage battery will not consume power when parked.

[0023] The embodiment also provides an automobile which uses the active suspension high-power power supply system in the above embodiment to supply power to the active suspension load. Since the automobile includes all the features of the active suspension high-power power supply system in the above embodiment, it has all the technical effects and advantages thereof.

[0024] The embodiment provides a solution of small-capacity battery in parallel with super capacitor for the power supply problem of 48V active suspension system. The super capacitor has great power density, and even a small capacity can realize instantaneous high-power output. Since the battery is connected in parallel with the super capacitor, the super capacitor and the battery supply power to the active suspension system during operation, and the super capacitor mainly supplies power during short-time high-power demand of the active suspension system. Since the super capacitor and the battery are connected in parallel, the battery charges the super capacitor in real time. Even if the super capacitor has low power after high-power output, it can be replenished after a certain period of time.

[0025] As Figure 1As shown, the utility model is composed of vehicle power supply 1, DC / DC device 2, super capacitor 3, active suspension load 4 (generally motor), ignition switch 5 and the like.

[0026] After ignition switch 5 is turned on, vehicle battery 1 charges super capacitor 3 through DC / DC device 2, so that the electric quantity of super capacitor 3 is always in a state that can satisfy the working of active suspension load 4, and the maximum value of charging current is limited, so as not to reduce the service life of vehicle power supply 1. After the engine is turned off, ignition switch 5 is turned off, so as to ensure that vehicle battery 1 will not be depleted when the vehicle is parked.

[0027] When active suspension load 4 works, it takes power from super capacitor 3, so even if the active suspension has a large power instantaneous working condition, it will not affect vehicle battery 1; super capacitor 3 itself has a certain electric quantity, so as to ensure that under the premise that the electric quantity cannot be supplemented in time, the active suspension load 4 can work at full load for a period of time, and the specific electric quantity will be matched according to the vehicle working condition and the like in the early design.

[0028] Obviously, the specific implementation of the present application is not limited by the above-mentioned manner, and various non-essential improvements adopting the method concept and technical scheme of the present application are within the protection scope of the present application.

Claims

1. An active suspension high power supply system, comprising an active suspension load, a vehicle-mounted power supply, characterized in that: The power supply system further comprises a super capacitor and a charging control unit; the positive and negative poles of the vehicle-mounted power supply are respectively connected to the input end of the charging control unit; the output end of the charging control unit is connected to the two ends of the super capacitor, so as to charge the super capacitor; the two ends of the super capacitor are connected to the positive and negative poles of the power supply of the active suspension load, so as to realize high-power power supply for the active suspension load. The power supply system further comprises a switch unit, which is connected in series in the loop between the positive pole of the vehicle-mounted power supply and the charging control unit or in the loop between the negative pole of the vehicle-mounted power supply and the charging control unit; the switch unit is an ignition switch; the charging control unit comprises a DC / DC device, which is used to charge the super capacitor after boosting the vehicle-mounted power supply; the vehicle-mounted power supply is a vehicle-mounted storage battery; the vehicle-mounted power supply is connected to a vehicle-mounted charger, and the vehicle-mounted power supply is charged by the vehicle-mounted charger.

2. An automobile characterized by: The automobile adopts the active suspension high-power power supply system according to claim 1 to supply power to the active suspension load.

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