CN110843528A - Automatic on-off control system for low-voltage auxiliary power supply of pure electric vehicle - Google Patents

Abstract

The invention particularly relates to an automatic on-off control system for a low-voltage auxiliary power supply of a pure electric vehicle, which comprises a low-voltage auxiliary power supply, a coil of a low-voltage auxiliary power supply contactor for controlling the on-off of the low-voltage auxiliary power supply, and a low-voltage auxiliary power supply control module, wherein the control output end of the low-voltage auxiliary power supply control module is connected with the coil of the low-voltage auxiliary power supply contactor, and the sampling input end of the low-voltage auxiliary power supply control module is connected with at least one of a central control lock controller for detecting a vehicle locking signal of the whole vehicle, the output end of an ACC relay and. Through the detection and analysis of the signal of the sampling input end, the intention of a driver can be judged, the low-voltage auxiliary power supply can be automatically switched on and off, the energy consumption is saved, the reliable power supply of the low-voltage auxiliary power supply is ensured, and the whole vehicle can safely run.

Description

Automatic on-off control system for low-voltage auxiliary power supply of pure electric vehicle

Technical Field

The invention particularly relates to an automatic on-off control system for a low-voltage auxiliary power supply of a pure electric vehicle.

Background

The existing pure electric commercial vehicle low-voltage auxiliary battery on-off control strategies mainly have two kinds:

the first control strategy is shown in FIG. 1: generally, a manual switch (installed outside the vehicle) is installed near the low-voltage auxiliary power supply of the vehicle, and the switch can control the positive pole and the negative pole of the low-voltage auxiliary power supply. The switch has the main functions that when a vehicle is parked, the switch is turned off, a low-voltage power supply on the whole vehicle is cut off, the storage time of the low-voltage auxiliary power supply is prolonged, and the condition that the vehicle cannot be started due to the fact that the electric quantity of the auxiliary power supply is consumed when the vehicle is parked by low-voltage electric appliances connected with normal electricity on the vehicle is avoided. According to the control strategy, after a driver gets off the vehicle, the switch is manually turned off to complete the power-off of the low-voltage auxiliary power supply of the whole vehicle, or the switch is manually turned on before the driver gets on the vehicle to complete the normal power-on of the low-voltage auxiliary power supply of the whole vehicle.

The second control strategy is shown in FIG. 2: a two-gear positioning switch is installed on a control panel inside a cab, a contactor is installed at a certain position (generally near a low-voltage auxiliary power supply) on a vehicle, the contactor is controlled through a switch, so that the on-off of the low-voltage auxiliary power supply of the whole vehicle is controlled, one end of the switch is connected with the low-voltage auxiliary power supply, the other end of the switch is connected with the contactor, and negative control or positive control can be achieved. When the strategy is used, the power supply of the central lock controller also needs to directly take power from the low-voltage auxiliary power supply. When a driver gets on the vehicle, the switch is manually switched to a closed state to finish the normal power supply of the low-voltage auxiliary power supply of the whole vehicle, and when the driver gets off the vehicle, the switch is manually switched to a disconnected state to finish the power off of the low-voltage auxiliary power supply of the whole vehicle.

The existing two control strategies need a driver to carry out manual operation, so that the driver is easy to forget, the driver forgets to turn off the low-voltage auxiliary power supply control switch after getting off, the vehicle normal-power electric appliance consumes the whole vehicle low-voltage auxiliary power supply, and the time for parking the vehicle and starting the vehicle normally is shortened. And when the second strategy is used, if a driver or a passenger carries out misoperation when the vehicle is running, the switch is switched off, the low-voltage auxiliary power supply of the whole vehicle is powered off, and unpredictable danger occurs.

Disclosure of Invention

The invention aims to provide an automatic on-off control system for a low-voltage auxiliary power supply of a pure electric vehicle, which is used for solving the problem that the control of the existing low-voltage auxiliary power supply needs manual operation.

The utility model provides an automatic on-off control system of electricelectric motor car low pressure auxiliary power supply, includes low pressure auxiliary power supply and the coil that is used for controlling the low pressure auxiliary power supply contactor of low pressure auxiliary power supply break-make, still includes low pressure auxiliary power supply control module, the coil of low pressure auxiliary power supply contactor is connected to low pressure auxiliary power supply control module's control output, the sampling input of low pressure auxiliary power supply control module is connected and is used for detecting at least one among the well accuse lock controller of whole car lock car signal, the output of ACC relay and the pressure sensor who is used for detecting the leaving seat signal.

Furthermore, the low-voltage auxiliary power supply control module and the central lock controller are connected with a power supply end of the low-voltage auxiliary power supply.

The invention has the beneficial effects that: the low-voltage auxiliary power supply control module detects the ACC signal, the car locking signal and the off-seat signal, so that the intention of a driver can be judged, the automatic on-off of the low-voltage auxiliary power supply is realized, the operation flow of the driver is reduced, and the situation that the electric vehicle forgets to switch off a low-voltage auxiliary unit switch to cause the quick power consumption of the low-voltage auxiliary power supply and even consume the electric quantity of the auxiliary power supply when the electric vehicle is parked can be effectively avoided; and the reliable power supply of the low-voltage auxiliary power supply can be avoided in the driving process, and the safe driving of the whole vehicle is ensured.

Drawings

FIG. 1 is a first schematic diagram of a manual on-off control system for a low-voltage auxiliary power supply in the prior art;

FIG. 2 is a schematic diagram II of a manual on-off control system of a low-voltage auxiliary power supply in the prior art;

fig. 3 is a schematic diagram of the low-voltage auxiliary power supply automatic on-off control system of the invention.

Detailed Description

The invention provides an automatic on-off control system for a low-voltage auxiliary power supply of a pure electric vehicle, which is used for solving the problem of power consumption caused by forgetting to operate a manual switch of the conventional low-voltage auxiliary power supply when the vehicle is stopped or driving danger caused by misoperation during driving.

Fig. 3 is a schematic diagram of the automatic on-off control system for the low-voltage auxiliary power supply of the pure electric vehicle according to the invention. The system mainly comprises a low-voltage auxiliary power supply, a low-voltage auxiliary power supply contactor and a low-voltage power supply control module, wherein the sampling input end of the low-voltage auxiliary power supply control module is connected with at least one of a central lock controller used for detecting a vehicle locking signal of the whole vehicle, the output end of an ACC relay and a pressure sensor used for detecting a leaving signal, and the control output end of the low-voltage auxiliary power supply control module is connected with a coil of the low-voltage auxiliary power supply contactor.

The low-voltage power supply control module and the central lock controller are both connected with the power supply end of the low-voltage auxiliary power supply and do not pass through an ignition power supply switch. When the vehicle is in a drivable state and a driver leaves the vehicle, the pressure sensor sends an off-seat signal to the low-voltage power supply control module, and meanwhile the vehicle needs to send an alarm signal.

Example one

When the sampling input end of the low-voltage auxiliary power supply control module is connected with any one of a central lock controller for detecting a vehicle locking signal of the whole vehicle, the output end of an ACC relay and a pressure sensor for detecting a seat-leaving signal.

For example, when the low-voltage power supply control module detects an unlocking signal, it is determined that the driver has an intention to drive the vehicle and does not intend to disconnect the low-voltage auxiliary power supply. The low-voltage power supply control module sends out control signals, the low-voltage auxiliary power supply contactor is closed, the whole vehicle low-voltage auxiliary power supply is conducted at the moment, the ignition switch is turned on through the key, and the vehicle can be started normally.

Certainly, the low-voltage power supply control module can also make whether the driver intends to drive according to the ACC signal or the off-seat signal detected independently, and can also send out a corresponding control signal through the low-voltage power supply control module.

Example two

When the sampling input end of the low-voltage auxiliary power supply control module is connected with two or three of a central lock controller used for detecting a vehicle locking signal of the whole vehicle, the output end of an ACC relay and a pressure sensor used for detecting an off-seat signal, the judgment information and the control result made by the power supply control module according to the detected single signal are more reliable than those made by the power supply control module in the first embodiment.

For example, when the low-voltage power supply control module detects a vehicle locking signal and a seat leaving signal but does not detect an ACC signal, it is determined that the driver leaves the vehicle, and actively locks the vehicle, the low-voltage power supply control module sends a control signal to the low-voltage power supply contactor to turn off the low-voltage auxiliary power supply contactor, the low-voltage auxiliary power supply of the entire vehicle will turn off the power supply loop, at this time, all electrical appliances of the vehicle except the low-voltage power supply control module and the central control lock controller will be powered off, and the vehicle enters a low power consumption mode.

When the low-voltage power supply control module detects the locking signal and the ACC signal, the driver is judged to be on the vehicle and intends to drive without disconnecting the low-voltage auxiliary power supply, the low-voltage power supply control module can continuously send out a control signal to close the low-voltage auxiliary power supply contactor, and the low-voltage auxiliary power supply of the whole vehicle cannot be disconnected and still is in a conducting state at the moment.

The sampling input signals of the low-voltage power supply control module can be combined in different modes, different judgment can be made on the intention of a driver according to different types of signals and the combination of different states of the signals, and corresponding control signals can be made.

The present invention has been described in relation to particular embodiments thereof, but the invention is not limited to the described embodiments. In the thought given by the present invention, the technical means in the above embodiments are changed, replaced, modified in a manner that is easily imaginable to those skilled in the art, and the functions are basically the same as the corresponding technical means in the present invention, and the purpose of the invention is basically the same, so that the technical scheme formed by fine tuning the above embodiments still falls into the protection scope of the present invention.

Claims (2)

1. Electricelectric motor car low pressure auxiliary power source automatic on-off control system, including low pressure auxiliary power source and the coil that is used for controlling the low pressure auxiliary power source contactor of low pressure auxiliary power source break-make, its characterized in that: the device is characterized by further comprising a low-voltage auxiliary power supply control module, wherein the control output end of the low-voltage auxiliary power supply control module is connected with a coil of a low-voltage auxiliary power supply contactor, and the sampling input end of the low-voltage auxiliary power supply control module is connected with at least one of a central lock controller used for detecting a whole vehicle locking signal, an output end of an ACC relay and a pressure sensor used for detecting an off-seat signal.

2. The automatic on-off control system for the low-voltage auxiliary power supply of the pure electric vehicle according to claim 1, characterized in that: and the low-voltage auxiliary power supply control module and the central lock controller are both connected with the power supply end of the low-voltage auxiliary power supply.

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