CN209795214U

CN209795214U - External charging protection device of electric vehicle

Info

Publication number: CN209795214U
Application number: CN201920053957.0U
Authority: CN
Inventors: 祝怡然
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-01-14
Filing date: 2019-01-14
Publication date: 2019-12-17
Anticipated expiration: 2029-01-14

Abstract

The utility model discloses an external charging protection device of an electric vehicle, which comprises a temperature sensor, a bending sensor, a controller, a wireless transmitting module, a power module and a wireless socket; temperature sensor and bending sensor all are connected with the signal input part of controller, and the signal output part and the wireless transmitting module of controller are connected, and the controller will charge or power off command signal transmission for wireless socket through wireless transmitting module. The utility model discloses a charging protection device sets up in electric motor car battery's outside, can not destroy the structure of original battery, and installation, maintenance, dismantlement are very convenient, and when the battery abnormal conditions appeared, can in time cut off being connected between its electrical apparatus socket and the charger, stop to charge the battery, avoid causing the damage to the battery, have effectively guaranteed the life and the security of battery.

Description

external charging protection device of electric vehicle

Technical Field

The utility model relates to a battery charging protection technical field especially relates to an external charging protection device of electric motor car.

background

batteries fall into two broad categories: rechargeable and non-rechargeable. Non-rechargeable batteries include alkaline batteries, lithium batteries, and the like; the rechargeable battery includes lead-acid, nickel-cadmium, nickel-hydrogen, lithium ion, lithium polymer, fuel cell, etc.

In daily life, when a high-voltage charger is used for charging a battery pack, the charger is easy to overcharge the battery pack for a long time, so that the battery pack is heated and deformed, and even dangers such as fire, explosion, nature and the like are caused.

Although being provided with the protection circuit that charges on some batteries, the protection circuit that charges of current battery all installs inside the battery, and the circuit protection board is less, the circuit is comparatively complicated, because battery package inner space is less, each components and parts high heat productivity when charging current is great, inconvenient heat dissipation causes the damage of device, circuit board easily, and the circuit board is dismantled and is maintained very inconveniently.

Disclosure of Invention

In view of this, the utility model provides an external charging protection device of electric motor car for solve the problem that exists among the background art.

An external charging protection device for an electric vehicle comprises a temperature sensor for detecting the temperature of a battery of the electric vehicle, a bending sensor for detecting the deformation of a bulge of the battery, a controller, a wireless transmitting module, a power supply module and a wireless socket; the temperature sensor and the bending sensor are both connected with a signal input end of the controller, a signal output end of the controller is connected with the wireless transmitting module, a power supply end of the controller is connected with the power supply module, and the controller transmits a charging or power-off command signal to the wireless socket through the wireless transmitting module;

The temperature sensor and the bending sensor are both fixed on a shell of the battery;

The wireless socket comprises an AC-DC conversion circuit, a wireless receiving module, a relay and an electrical appliance socket, wherein the input end of the AC-DC conversion circuit is connected to an alternating current power supply, the output end of the AC-DC conversion circuit is connected to the wireless receiving module, the control end of the relay is connected with the wireless receiving module, the contact end of the relay is respectively connected with the alternating current power supply and the electrical appliance socket, and a charger of the battery is inserted into the electrical appliance socket.

Preferably, the charging protection device further comprises a key for setting the charging time of the electric vehicle battery and a display screen for displaying the battery temperature, the battery bulge deformation and the charging time, and the key and the display screen are electrically connected with the controller.

Preferably, the charging protection device further comprises a WIFI module for receiving the battery temperature signal and the battery bulge deformation signal from the controller and transmitting the received signals to the external mobile terminal, and the WIFI module is electrically connected with the controller.

Preferably, the mobile terminal is a mobile phone, a notebook or a tablet computer.

Preferably, the controller adopts an MCU singlechip.

Preferably, the relay is an anti-surge relay.

The utility model has the advantages that: the utility model discloses simple structure, convenient to use, charging protection device set up in electric motor car battery's outside, can not destroy the structure of original battery, and it is very convenient to maintain, dismantle. During the use, the one end of electric vehicle charging ware is connected to the power source interface of battery, and the other end is inserted on charging protection device's electrical apparatus socket, and charging protection device carries out real-time detection to the temperature and the casing deflection of battery, when the abnormal conditions appearing, in time cuts off the connection between its electrical apparatus socket and the charger, stops to charge to the battery, avoids causing the damage to the battery, has effectively guaranteed the life and the security of battery.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic block circuit diagram of the present invention.

Fig. 2 is a relay control circuit diagram of a wireless outlet.

Detailed Description

For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.

It should be clear that the described embodiments are only some, but not all embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The present application is described in further detail below with reference to specific embodiments and with reference to the attached drawings.

In the description of the present application, unless explicitly stated or limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, e.g., "connected" may be a fixed connection, a removable connection, an integral connection, or an electrical connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment of the utility model provides an external charging protection device of electric motor car, this charging protection device set up in the outside of electric motor car battery, and it is connected with 220V alternating current network, and the one end of electric vehicle charging ware is connected to the power source, the other end of battery and inserts on charging protection device's electrical apparatus socket. When the charging protection device detects that the temperature of the battery is too high and/or the deformation of the battery bulge is too large, the charging loop is disconnected, and the battery charging is stopped.

referring to fig. 1, it is the circuit schematic block diagram of the external charging protection device for electric vehicle of the present invention. As shown in the figure, the external charging protection device of the electric vehicle comprises a temperature sensor, a bending sensor, a controller, a wireless transmitting module, a power supply module and a wireless socket.

Specifically, the temperature sensor and the bending sensor are both fixed on a shell of the battery, and signal output ends of the temperature sensor and the bending sensor are both connected with a signal input end of the controller. The temperature sensor is used for detecting the battery temperature of the electric vehicle and transmitting a temperature signal to the controller. The bending sensor is used for detecting the deformation of the battery during bulging and transmitting a deformation signal to the controller, the resistance value of the bending sensor is 9k ohms when the bending sensor is not bent, the resistance value of the bending sensor is 14k ohms when the bending sensor is bent for 90 degrees, the resistance value of the bending sensor is 22k ohms when the bending sensor is bent for 180 degrees, and the working temperature of the bending sensor is-35-80 ℃.

The power module is used for supplying power to the controller and is connected with a power supply end of the controller, and the power module is an independent direct-current power supply only supplying power to the controller.

The controller is used for processing the received temperature signal and the deformation signal and sending a charging or power-off instruction signal to the wireless socket through the wireless transmitting module, namely when the current battery temperature exceeds a set threshold or the deformation of the battery shell exceeds the set threshold, the controller can send a power-off instruction signal through the wireless socket of the wireless transmitting module box; otherwise, a charging instruction signal is sent to the wireless socket. In this embodiment, the controller is an MCU single chip.

The wireless socket comprises an AC-DC conversion circuit, a wireless receiving module, a relay and an electric appliance socket.

The AC-DC conversion circuit is used for converting alternating current into direct current so as to supply power to the wireless receiving module. Specifically, the input terminal (AC terminal) of the AC-DC conversion circuit is connected to an AC power supply, and the output terminal (DC terminal) is connected to the wireless reception module.

The wireless receiving module is in communication connection with the wireless transmitting module and used for receiving charging or power-off command signals from the wireless transmitting module, and the control end of the wireless receiving module is connected with the control end of the relay. The contact end of the relay is respectively connected with an alternating current power supply and an electric appliance socket, one end of the charger is inserted into the electric appliance socket, and the other end of the charger is connected with a power supply interface of the battery. In this embodiment, the wireless transmitting module, the wireless receiving module and the relay are all market products.

Referring to fig. 2, it is a control circuit diagram of the relay in the wireless socket. IN the figure, a contact L _ IN and a contact L _ OUT of the relay are respectively connected to a 220V alternating current grid and the charger, namely a J1 end is connected with the 220V alternating current grid, and a J2 end is connected with the charger.

The diode D1 is connected in parallel with the relay coil, and the capacitor C is connected in series with the resistor R1 and then connected in parallel with the relay coil. One end of the relay coil is connected to 5V direct current, the other end of the relay coil is connected with a resistor R2, a resistor R2 is connected with a collector of a triode Q1, a base set of the triode Q1 is connected with a control signal output end of the wireless receiving module through a resistor R3, namely a PC end is connected to the control signal output end of the wireless receiving module. In this embodiment, the transistor Q1 is an NPN transistor.

When the wireless receiving module receives a charging instruction, the PC port outputs a high level, the triode Q1 is conducted, the coil K1 of the relay has current flowing, and the contact L _ IN and the contact L _ OUT of the relay are attracted to start supplying power to the charger.

When the wireless receiving module receives a power-off instruction, the PC port outputs a low level, the triode Q1 is cut off, the coil K1 of the relay is powered off, the contact L _ IN and the contact L _ OUT of the relay are disconnected, and the charger is powered off.

The utility model discloses an external charging protection device of electric motor car still can include button and display screen, and the button is connected with the signal input part of controller, and the display screen links to each other with the signal output part of controller. The controller can transmit the current battery temperature, the battery bulge deformation and the charging time to the display screen for displaying in the display screen.

The utility model discloses an external protection device that charges of electric motor car still can include the WIFI module, and the signal input part of WIFI module links to each other with the signal output part of controller, and it can receive battery temperature signal and battery bulge deflection signal from the controller to with received signal transmission to outside mobile terminal, in this embodiment, mobile terminal can be cell-phone, notebook or panel computer etc..

In the actual use process, the temperature sensor and the bending sensor are fixed on the outer wall of the battery of the electric vehicle, one end of the charger of the electric vehicle is connected to a power supply interface of the battery, and the other end of the charger of the electric vehicle is inserted into an electric appliance socket to start charging. The temperature sensor and the bending sensor detect the temperature and the deformation of the battery in real time, and transmit detected signals to the controller, the controller processes the received signals, and if the temperature or the deformation does not exceed a set threshold value, a charging instruction is sent to the wireless socket through the wireless transmitting module to charge the battery; otherwise, a power-off instruction is sent to the wireless socket through the wireless transmitting module, and the battery charging is stopped.

Before charging, a user can set the charging time through a key. In the charging process, a timer of the controller counts time, and transmits the charging time to the display for real-time display. When the set charging time is up, the controller sends a power-off instruction to the wireless socket through the wireless transmitting unit, the charging loop is automatically disconnected, and the battery charging is stopped.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An external charging protection device of an electric vehicle is characterized by comprising a temperature sensor for detecting the temperature of a battery of the electric vehicle, a bending sensor for detecting the deformation of a bulge of the battery, a controller, a wireless transmitting module, a power supply module and a wireless socket; the temperature sensor and the bending sensor are both connected with a signal input end of the controller, a signal output end of the controller is connected with the wireless transmitting module, a power supply end of the controller is connected with the power supply module, and the controller transmits a charging or power-off command signal to the wireless socket through the wireless transmitting module;

2. The external charging protection device for the electric vehicle as claimed in claim 1, further comprising a button for setting the charging time of the electric vehicle battery, and a display screen for displaying the battery temperature, the battery bulge deformation and the charging time, wherein the button and the display screen are electrically connected to the controller.

3. The external charging protection device for the electric vehicle as recited in claim 1, further comprising a WIFI module for receiving the battery temperature signal and the battery bulge deformation signal from the controller and transmitting the received signals to an external mobile terminal, wherein the WIFI module is electrically connected to the controller.

4. The external charging protection device for the electric vehicle as claimed in claim 3, wherein the mobile terminal is a mobile phone, a notebook or a tablet computer.

5. The external charging protection device for the electric vehicle as claimed in claim 2 or 3, wherein the controller is an MCU (microprogrammed control unit) singlechip.

6. The external charging protection device for the electric vehicle as claimed in claim 1, wherein the relay is an anti-surge relay.