Automobile storage battery negative electrode power disconnect device

Abstract

The utility model discloses a kind of automobile storage battery negative electrode power disconnecting device, device is fixed in shell, positive busbar and negative busbar are equipped in the shell, and parallelly connected with chargeable power module, control module, voltage detection module between positive busbar and negative busbar, the voltage detection module is connected and exports inductive signal to control module, positive busbar and negative busbar are equipped with two connecting electrodes, respectively input electrode and output electrode, the input electrode is used to connect the two poles of automobile storage battery, the output electrode connects automobile power cable, relay is equipped on the output electrode, the control module is connected and exports control signal to relay.The utility model is characterized in that simple structure, the improvement to existing vehicle can be realized by simple lap joint, negative electrode power is disconnected in time when storage battery voltage is lower than certain value, effectively prevent the power shortage problem caused by excessive discharge of storage battery, prolong the service life of storage battery, also ensure that vehicle can be normally started after long time parking.

Description

Technical Field

[0001] This utility model relates to the field of automotive electronics technology. Background Technology

[0002] With the widespread use of cars, it's common for vehicles to be parked for extended periods. During this time, onboard electronic devices such as anti-theft systems and onboard computers continue to consume battery power. When the battery voltage drops to a certain level, it can lead to a complete battery drain, preventing the vehicle from starting.

[0003] Currently, while there are some battery protection devices on the market, most are single-function. They either rely on manually disconnecting the negative terminal of the battery to prevent depletion, which is inconvenient and cannot monitor voltage changes in real time; or they employ complex intelligent control systems, which are costly and not widely applicable. For example, the patent publication CN203596609U, published on May 14, 2014, entitled "Automotive Battery Over-Discharge Protection Device," discloses an automotive battery over-discharge protection device that cuts off the battery output when the battery charge falls below a certain set value. It includes a manual reset button, a backup battery, a solid-state relay, a control circuit, and a charging circuit. The solid-state relay is connected to the positive terminal of the automotive battery, and the control circuit is directly connected to the solid-state relay to control it. The control circuit is also connected to the positive terminal of the automotive battery to sample the voltage. The charging circuit is connected to the positive terminal of the automotive battery to directly charge it. The backup battery serves as a backup power source for the entire device. When the solid-state relay disconnects, it needs to be manually reset before starting the car to restore battery power and start the vehicle.

[0004] Therefore, there is an urgent need to design a device that is simple in structure, low in cost, easy to modify into existing vehicles, and can automatically control the power supply according to the battery voltage status, so as to solve the problem of vehicles being unable to start after the battery is depleted when the car has been parked for a long time. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to realize a car battery negative terminal power disconnection device that is simple in structure, low in cost, easy to modify existing vehicles, and can automatically control the battery on and off, and can also be operated manually.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a negative terminal power disconnect device for an automotive battery. The device is fixed inside a housing, which contains a positive bus and a negative bus. A rechargeable power supply module, a control module, and a voltage detection module are connected in parallel between the positive and negative bus. The voltage detection module is connected to and outputs a sensing signal to the control module. Both the positive and negative bus have two connecting electrodes, namely an input electrode and an output electrode. The input electrode is used to connect to the two terminals of the automotive battery, and the output electrode is connected to the automotive power cable. A relay is provided on the output electrode, and the control module is connected to and outputs a control signal to the relay.

[0007] The input electrode is connected to the positive or negative bus via a sub-relay, and the control module is connected to and outputs control signals to the sub-relay.

[0008] The sub-relay and the relay are equipped with a manual switch for manual connection, and the manual switch is fixed to the housing.

[0009] The manual switch is a time-delay switch, and the relay is a normally closed switch.

[0010] The control module is equipped with a signal receiver, and the signal receiver is equipped with a matching remote controller, which is used to remotely control the control module to start the relay and sub-relay.

[0011] The remote control is integrated into the car key.

[0012] The shell is a flat, hollow structure, and the shell is provided with support feet around its perimeter for fixing.

[0013] The advantage of this utility model lies in its simple structure. It can improve existing vehicles through simple assembly. By disconnecting the negative power supply in time when the battery voltage is lower than a certain value, it effectively prevents the problem of battery over-discharge and power loss, extends the service life of the battery, and also ensures that the vehicle can start normally after being parked for a long time. Attached Figure Description

[0014] The following is a brief explanation of the content represented by each of the accompanying drawings in this utility model specification:

[0015] Figure 1 Schematic diagram of a device for disconnecting the negative power supply of a car battery. Detailed Implementation

[0016] The following description, with reference to the accompanying drawings, details the specific implementation of this utility model, including the shape and structure of each component, the relative positions and connections between the parts, the function and working principle of each part, the manufacturing process, and the operation and use methods. This will help those skilled in the art to have a more complete, accurate, and in-depth understanding of the inventive concept and technical solution of this utility model.

[0017] The purpose of this utility model is to provide an automatic disconnection device for the negative terminal power supply of an automotive battery. By monitoring the battery voltage in real time, the device automatically disconnects the negative terminal power supply of the battery when the voltage is lower than a certain value, effectively preventing the battery from running out of power and ensuring that the vehicle can still start normally after being parked for a long time.

[0018] like Figure 1 As shown, the device is a single unit, integrated within a housing. Input and output electrodes extend from the housing for connection. Each input and output electrode has two terminals. The two terminals of the input electrode are used to connect to the positive and negative terminals of the car battery, respectively. The two terminals of the output electrode are used to connect to the car's power cables. The car's power cables are the two cables that were originally connected to the car battery. Now, the car battery negative power disconnect device is used as a bridge to connect the car's power cables and the battery.

[0019] The housing contains a positive bus and a negative bus. The positive terminals of the input and output electrodes are connected to the positive bus, and the negative terminals are connected to the negative bus. To control battery circuit breakers and reduce the possibility of power failure, a relay is connected in series with the output electrode. A sub-relay can also be connected in series with the input electrode. This allows for timely monitoring of the voltage after the vehicle is turned off. When the battery voltage is low (potentially due to long-term storage), the relay is deactivated, enabling real-time monitoring of the battery voltage and automatic control of the negative power supply based on the voltage status. No manual intervention is required, making it convenient and significantly improving the user experience. The relay and sub-relay are preferably connected in series with the negative terminals of the input and output electrodes. By promptly disconnecting the negative power supply when the battery voltage drops below a certain value, it effectively prevents over-discharge and extends battery life, while also ensuring the vehicle can start normally after prolonged parking.

[0020] A rechargeable power supply module, a control module, and a voltage detection module are connected in parallel between the positive and negative busbars. The voltage detection module, with its input terminals connected to the positive and negative terminals of the automotive battery, is used to detect the battery voltage in real time and transmit the detected voltage signal to the control module. This module uses a high-precision voltage sensor, which can quickly and accurately obtain battery voltage information and can use existing voltage detection modules.

[0021] The control module is essentially a standard microcontroller that operates relays based on threshold values. It connects to the output of the voltage detection module and receives the voltage signal transmitted from it. The control module has a pre-set voltage threshold. When the received voltage signal falls below the threshold, the control module sends an open signal to the relay module; when the voltage recovers to a certain level, the control module sends a closed signal to the relay module. The control module uses a microcontroller (such as a single-chip microcomputer) as its core control unit. Preferably, the control module includes a signal receiver with a matching remote control. The remote control is used to remotely activate the relays and sub-relays, allowing the sub-relays and relays to be opened remotely after a circuit break. The remote control functionality is preferably integrated into the car key.

[0022] Both the sub-relay and the relay are normally closed switches, which can maintain an open circuit state when power is off. In order to enable manual operation of the sub-relay and the relay, the sub-relay and the relay are equipped with manual switches for manual connection. The manual switches are fixed on the housing. The manual switches are preferably time-delay switches, for example, closing after a delay of half an hour, to provide sufficient time for starting the vehicle.

[0023] The rechargeable power supply module provides operating power to the voltage detection module, control module, and relay module. It draws power from the vehicle's battery and processes it through step-down and voltage-regulating circuits to convert it into the stable voltage required by each module; a conventional lithium battery can be used.

[0024] The housing preferably adopts a flat, hollow structure, and all components are fixed inside the housing. The flat structure makes it easy to fix to the front compartment of the car. Of course, different shapes of housings can be made according to different car models to make them more adaptable. Support feet are provided around the housing for fixing.

[0025] Under normal operating conditions, if the car is not parked for an extended period and the battery monitoring status is normal, the control module will not disconnect the relay, and the car will not be affected when restarting. However, after prolonged parking, the control module will disconnect the relay, preventing the car from powering on. The user can remotely activate the relay to turn the car back on and use it again. If the car is stored for too long, the rechargeable power module may become depleted, potentially preventing the relay from starting. In this case, the manual switch can be operated to open the relay and connect the battery to the car. If the battery is not depleted, the car can be used normally. If the battery is still depleted, a jump start is required to start the vehicle. This device can relatively delay the battery depletion time, making it easy to install and maintain, and suitable for widespread application in various types of vehicles.

[0026] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A device for disconnecting the negative terminal power of an automotive battery, characterized in that: The device is fixed inside a housing, which contains a positive bus and a negative bus. A rechargeable power supply module, a control module, and a voltage detection module are connected in parallel between the positive and negative bus. The voltage detection module is connected to and outputs a sensing signal to the control module. Both the positive and negative bus have two connecting electrodes, namely an input electrode and an output electrode. The input electrode is used to connect to the two terminals of the car battery, and the output electrode is connected to the car's power cable. A relay is provided on the output electrode, and the control module is connected to and outputs a control signal to the relay.

2. The automotive battery negative terminal power disconnection device according to claim 1, characterized in that: The input electrode is connected to the positive or negative bus via a sub-relay, and the control module is connected to and outputs control signals to the sub-relay.

3. The automotive battery negative terminal power disconnection device according to claim 2, characterized in that: The sub-relay and the relay are equipped with a manual switch for manual connection, and the manual switch is fixed to the housing.

4. The automotive battery negative terminal power disconnection device according to claim 3, characterized in that: The manual switch is a time-delay switch, and the relay is a normally closed switch.

5. The automotive battery negative terminal power disconnection device according to claim 4, characterized in that: The control module is equipped with a signal receiver, and the signal receiver is equipped with a matching remote controller, which is used to remotely control the control module to start the relay and sub-relay.

6. The automotive battery negative terminal power disconnection device according to claim 5, characterized in that: The remote control is integrated into the car key.

7. The automotive battery negative terminal power disconnection device according to any one of claims 1-6, characterized in that: The shell is a flat, hollow structure, and the shell is provided with support feet around its perimeter for fixing.

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