CN203438958U - Embedded storage battery outage protector - Google Patents

Abstract

The utility model discloses an embedded storage battery outage protector. Storage battery outage protection is placed under the management of a BCM (Body Control Module), so that the structure of the outage protector is simplified, electric energy of a storage battery can be saved efficiently, and the phenomenon of insufficient power of the storage battery is avoided. The embedded storage battery outage protector comprises a BCM, a contactor and a control switch, wherein the BCM comprises an output relay; a normally-open contact of the output relay is connected with the anode of the storage battery and one end of a sucking coil of the contactor respectively; the other end of the sucking coil is connected to the cathode of the storage battery; the normally-open contact of the contactor is connected in series between the cathode of the storage battery and the power supply cathode of an automobile electrical appliance; the storage battery is supplied with power by the BCM; the control switch is connected with the I/O (Input/Output) pin and the BCM power ground of the BCM.

Description

A built-in battery cut-off protector

technical field

The utility model relates to a battery over-discharge protection device, in particular to a battery power-off protector used for preventing battery over-discharge for automobiles.

Background technique

A power-off protector is installed at the battery position of the front cabin of some cars to prevent the battery from running out of power due to standby power consumption or leakage of various electrical appliances when the vehicle is parked for a long time, resulting in the failure of the vehicle to start normally. And this external power-off protector will not only increase the manufacturing cost of the bicycle, but also take up additional installation space, and the work reliability is not very high due to its own structural problems.

The publication date is April 22, 2009, and the patent document with the publication number CN 201226441Y discloses a technical scheme titled a power-off protector for automobiles, which uses a radio receiver, an infrared probe, a switch, a radio handle, a fuse and Devices such as multiple relays form the power-off protection for the storage battery to prevent power loss. The disadvantage of this technical solution is that many devices are used, which makes its structure complicated, and the wireless device, infrared device, coil, etc. of the device itself continue to take power from the battery in the parking state, which consumes extra battery power.

Contents of the invention

The main purpose of the utility model is to provide a built-in battery power-off protector, which puts the battery power-off protection under the management of the BCM (vehicle controller), simplifies the structure of the power-off protection device, and can effectively save battery power to prevent The battery discharge phenomenon occurs.

The utility model mainly solves the problems in the prior art through the following technical solutions, a built-in battery power-off protector, the battery supplies power to the electrical appliances of the vehicle, including BCM, contactor and control switch, BCM includes output relay, A normally open contact of the output relay is respectively connected to the positive pole of the battery and one end of the attraction coil of the contactor. During the period, the BCM is powered by the battery, and the control switch is connected to the I/O pin of the BCM and the ground of the BCM power supply.

In this technical solution, the BCM and the output relay inside the BCM are used to realize the power-off protection of the storage battery. Since the power supply of the automotive electrical appliances is provided by the battery, in the non-power-off protection state, the BCM energizes the output relay, and the normally open contact of the output relay is closed to energize the attraction coil of the contactor, so the normally open contact of the contactor is closed, and the The circuit connecting various electrical appliances such as the starter to the battery is connected, and the battery is in a normal power supply state; when the vehicle needs to be disconnected after parking, press the control switch, and the BCM gets an instruction to cut off the power to the output relay, and its normally open contact Disconnect, so the normally open contact of the contactor is disconnected, and the battery circuit from the battery to the electrical appliances is disconnected, so as to maintain the electric energy of the battery and prevent the battery from losing power due to the discharge of the battery after parking for a long time. Moreover, the technical scheme makes the relay and the contactor have no power consumption of the working coil in the parking state, further saving the electric energy of the storage battery. When the vehicle needs to be started, as long as the control switch is operated again, the BCM will close the normally open contact of the contactor through the output relay, so the vehicle quickly enters the normal power supply state. Since the BCM has a sleep state that can be awakened, the power consumption of the BCM in the parking state is very low.

Preferably, a relay fuse is connected in series between the normally open contact of the output relay and the positive pole of the storage battery. To enhance the security of the control circuit. The relay fuse (wire) is the relay fuse configured for each output relay in the BCM.

As preferably, the control switch is installed on the instrument panel in the vehicle. for the convenience of the driver.

Preferably, the control switch is a self-resetting push button switch. The self-resetting push button switch has the characteristics of simple structure, long life and high reliability, and is easy to operate.

Preferably, the self-resetting push button switch is provided with an LED indicator, and the LED indicator is connected in parallel to the working coil of the output relay through a current limiting resistor. The LED indicator is used as a status indicator indicating whether the battery is in the power-off protection state.

Preferably, the BCM is also connected to the main driving door detection switch. The main driver's door opening signal is used as the trigger signal for BCM to connect the battery circuit, making the battery cut-off protector more humanized and convenient to use, that is, when the main driver's door is opened again after parking, the BCM will automatically switch the battery to the car. The power supply circuit of the appliance is switched on.

The beneficial effect brought by the utility model is that compared with the installation of an external power-off protector, the circuit structure is simplified, which not only reduces the manufacturing cost of the bicycle, but also makes full use of BCM resources, so that the installation of the power-off protection device and It is very convenient to use and reliable in operation, and can effectively prevent the phenomenon that the battery is discharged to the outside after long-term parking, causing the voltage to be too low, and the vehicle cannot be started normally.

Description of drawings

Fig. 1 is a kind of functional block diagram of the utility model.

In the figure: 1 is the BCM, 2 is the output relay, 3 is the contactor, 4 is the control switch, 5 is the main driving door detection switch, 6 is the relay fuse, 7 is the automotive electrical appliance, 8 is the battery, 9 is the LED indicator lamp.

Detailed ways

The technical solutions of the present utility model will be further specifically described below through the embodiments and in conjunction with the accompanying drawings.

Embodiment: As shown in Figure 1, the utility model is a built-in battery power-off protector. BCM 1 includes an output relay 2, one end of the normally open contact of the output relay 2 is connected to the positive pole of the battery 8 through the relay fuse 6, and the other end is connected to one end of the attracting coil of the contactor 3, and the other end of the attracting coil of the contactor 3 is connected to the battery 8, the normally open contact of the contactor 3 is connected in series between the negative pole of the battery 8 and the negative pole of the power supply of the automotive electrical appliance 7, and the positive pole of the power supply of the automotive electrical appliance 7 is connected to the positive pole of the battery 8; BCM 1 is powered by the battery 8; Switch 4 adopts a self-resetting button switch, one end of the self-resetting button switch is connected to the I/O pin of BCM 1, and the other end is connected to the power ground of BCM 1, and the self-resetting button switch is installed on the instrument panel in the car; The door detection switch 5 (use position detection switch) is installed between the main driver's door and the vehicle frame to detect the opening action of the car door. The main driver's door detection switch 5 is connected to the I/O pin of BCM 1; the LED indicator light 9 is installed on the self-resetting On the button of the push button switch, and connected in parallel to the working coil of the output relay 2 through the current limiting resistor,

In the non-power-off protection state, BCM 1 energizes the working coil of output relay 2, and the normally open contact of output relay 2 is closed to energize the attraction coil of contactor 3, so the normally open contact of contactor 3 is closed. Automotive electrical appliances 7 Connect to the power circuit of the battery 8; when the battery needs to be disconnected after the vehicle is parked, press the control switch 4 (self-resetting button switch), and the BCM 1 will receive an instruction to power off the output relay 2, and its normally open contact will be disconnected , so the normally open contact of the contactor 3 is disconnected, and the battery 8 is disconnected from the power circuit of the automotive electrical appliance 7; in the power-off protection state, the control switch 4 is pressed again, and the connection between the battery 8 and the automotive electrical appliance 7 is connected again. When the main driver's door is opened in the power-off protection state, the main driver's door detection switch 5 will act, and the BCM 1 can control the contactor 3 to connect the circuit between the battery 8 and the automobile electrical appliance 7; The LED indicator is off in the power-off protection state.

Claims (6)

1. A kind of built-in storage battery cut-off protector, described storage battery supplies power to automobile electric appliances, it is characterized in that: comprise BCM, contactor and control switch, described BCM comprises output relay, a normally open contact of described output relay Respectively connect the positive pole of the battery and one end of the attraction coil of the contactor, the other end of the attraction coil is connected to the negative pole of the battery, and the normally open contact of the contactor is connected in series between the negative pole of the battery and the negative pole of the power supply of the automobile electrical appliance. The BCM is powered by a storage battery, and the control switch is connected to the I/O pin of the BCM and the ground of the BCM power supply. 2. A built-in battery power-off protector according to claim 1, characterized in that: a relay fuse is connected in series between the normally open contact of the output relay and the positive pole of the battery. 3. A built-in battery power-off protector according to claim 1, characterized in that: the control switch is installed on the instrument panel in the vehicle. 4. A built-in battery cut-off protector according to claim 1 or 3, characterized in that: the control switch is a self-resetting push button switch. 5. A built-in battery power-off protector according to claim 4, characterized in that: said self-resetting button switch is provided with an LED indicator light, and said LED indicator light is connected in parallel to said output through a current-limiting resistor. On the working coil of the relay. 6 . The built-in battery power cut protector according to claim 1 , wherein the BCM is also connected to a main driving door detection switch.

Images