CN211844147U

CN211844147U - Charging fireproof device of electric bicycle

Info

Publication number: CN211844147U
Application number: CN201922392710.4U
Authority: CN
Inventors: 金明; 聂佰玲; 莫丹梅
Original assignee: Nanjing College of Information Technology
Current assignee: Nanjing College of Information Technology
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-11-03
Anticipated expiration: 2029-12-27

Abstract

The utility model discloses an electric bicycle charging fire protection device, which comprises a processing module, a charging control module, a power conversion module and a temperature sensor for sensing the temperature of a charging electrode of an electric bicycle storage battery; the power supply conversion module can obtain electric energy from commercial power, supply power to each power utilization module and the temperature sensor in the fire protection device and charge the storage battery; a normally closed contact of a relay is also connected in series in a charging loop of the storage battery; the processing module can collect the electric signal transmitted by the temperature sensor, and judges that the temperature of the charging electrode of the storage battery is higher than the preset charging ignition critical temperature of the electric bicycle according to the electric signal, and the normally closed contact of the relay is controlled to be disconnected through the charging control module, so that the electric bicycle is effectively prevented from being ignited when being charged.

Description

Charging fireproof device of electric bicycle

Technical Field

The utility model belongs to the technical field of electric bicycle, especially, relate to an electric bicycle fire prevention device that charges.

Background

Electric bicycles are one of the most widely used road vehicles at present. According to incomplete statistics, the quantity of electric bicycles in China in 2018 is more than 2.5 hundred million. However, because some batteries and charging equipment of the electric bicycles are unqualified, or some vehicle owners do not pay attention to safety, the electric bicycles are charged in an overhead line mode, the charging fire accidents of the electric bicycles frequently occur due to the factors, and according to statistics, 80% of electric vehicle fires occur during charging. Although 31 days in 12 months in 2017, the ministry of public security issues an announcement about the standard electric vehicle parking charging and fire prevention strengthening, and many manufacturers in China also establish a cell charging station, the phenomenon that a user pulls and connects wires in a mess mode still exists, so that the charging and firing accidents of the electric bicycles occur frequently; if the flame retardant grade of combustible materials of the electric bicycle is improved, the production cost is inevitably increased, and the market competitiveness is reduced. Therefore, there is a strong need for a device that is low in cost, high in safety, and capable of preventing the electric bicycle from being charged and ignited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome not enough among the prior art, provide an electric bicycle fire prevention device that charges, can prevent electric bicycle from charging the fire at least.

The utility model provides a following technical scheme:

a charging fire protection device for an electric bicycle comprises a processing module, a charging control module, a power supply conversion module and a temperature sensor for sensing the temperature of a charging electrode of a storage battery of the electric bicycle; the power supply conversion module can obtain electric energy from commercial power, supply power to each power utilization module and the temperature sensor in the fire protection device and charge the storage battery; a normally closed contact of a relay is also connected in series in a charging loop of the storage battery; the processing module can gather the signal of telecommunication that temperature sensor transmitted to according to the signal of telecommunication judges whether when battery charging electrode temperature is greater than the critical temperature of the electric bicycle that predetermines that charges and catches fire, then through the disconnection of the normally closed contact of charging control module control relay.

Preferably, the fire protection device further comprises a user terminal and a communication module, the processing module is in signal connection with the user terminal through the communication module, and when the temperature of the charging electrode of the storage battery is higher than the preset charging ignition critical temperature of the electric bicycle, the processing module outputs an alarm signal to the user terminal through the communication module.

Preferably, the temperature sensor is annular and is sleeved on the charging electrode of the storage battery.

Preferably, the temperature sensor is a DS18B20 temperature sensor.

Preferably, the charging control module comprises a freewheeling diode and a triode, the freewheeling diode is connected with a coil of the relay in parallel, the negative electrode of the freewheeling diode is electrically connected with the direct-current output end of the power supply conversion module, and the positive electrode of the freewheeling diode is electrically connected with the collector of the triode; the base electrode of the triode is electrically connected with the control signal output end of the processing module, and the emitting electrode of the triode is grounded.

Preferably, a protection resistor is further connected in series between the base of the triode and the control signal output end of the processing module.

Preferably, the communication module is a wired or wireless communication module.

Preferably, the user terminal includes a display and a voice prompt module.

Compared with the prior art, the utility model discloses the beneficial effect who reaches:

when the electrode temperature of the storage battery reaches a certain preset value, the charging control module can cut off the charging loop of the storage battery in time, so that the function of preventing the electric bicycle from being charged and ignited is achieved, and the electric bicycle charging device is simple in structure, low in cost and suitable for market popularization and use.

Drawings

Fig. 1 is a schematic circuit block diagram of a charging fire protection device for an electric bicycle according to an embodiment of the present invention;

fig. 2 is a circuit diagram of the charging control module according to the embodiment of the present invention.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1-2, a charging fire protection device for an electric bicycle comprises a processing module, a charging control module, a power conversion module and a temperature sensor for sensing the temperature of a charging electrode of a storage battery of the electric bicycle; the power conversion module can obtain electric energy from commercial power, namely the power conversion module rectifies 220V alternating current of the commercial power into 12V-80V direct current, and then supplies power to each power utilization module and the temperature sensor in the fire protection device and charges the storage battery.

Temperature sensor adopts DS18B20 temperature sensor, is the annular, and on the battery charging electrode was located to the cover, can be the signal of telecommunication with battery charging electrode temperature signal conversion, processing module can gather the signal of telecommunication that temperature sensor transmitted, and according to the signal of telecommunication is judged when battery charging electrode temperature is greater than the critical temperature of fire that charges of predetermined electric bicycle, then processing module just to charge control module output control signal makes the normally closed contact KA1 disconnection of relay, thereby cuts off the charge circuit of battery, plays the effect of fire prevention.

The fire protection device further comprises a user terminal and a communication module, wherein the user terminal comprises a display and a voice prompt module, and the user terminal adopts a smart phone of a user in the embodiment. The communication module adopts a wired or wireless communication module, and the communication module adopts a wireless communication module in the embodiment, so that the wireless communication module does not need to be connected with a user terminal, and long-distance signal transmission can be realized. The processing module is in signal connection with a smart phone of a user through the wireless communication module, and when the temperature of the charging electrode of the storage battery is higher than a preset charging ignition critical temperature of the electric bicycle, the processing module outputs an alarm signal to the smart phone of the user through the wireless communication module to inform the user that the charging ignition accident of the electric bicycle is avoided.

As shown in fig. 2, the charging control module includes a freewheeling diode VD and a transistor T, the freewheeling diode VD is connected in parallel with the coil KA of the relay, a negative electrode of the freewheeling diode VD is electrically connected to a dc output terminal VCC of the power conversion module, and a positive electrode of the freewheeling diode VD is electrically connected to a collector of the transistor T; and the base electrode of the triode T is electrically connected with the control signal output end of the processing module, and the emitting electrode of the triode T is grounded. And a protective resistor R is also connected in series between the base electrode of the triode T and the control signal output end of the processing module. The charging control module has the following working principle: work as temperature sensor judges that battery charging electrode temperature is greater than when the critical temperature of fire is caught in the charging of predetermined electric bicycle, temperature sensor just transmits for processing module through the signal of telecommunication form, processing module just to the control module output control signal that charges, control signal sends to triode T's base through protection resistance R, lead to triode T to switch on, the coil KA of relay gets electric, make the normally closed contact KA1 disconnection of the relay that concatenates in the charging circuit of battery, thereby in time cut off the charging circuit of battery, electric bicycle stops to charge, play the fire prevention effect. When the charging control module does not receive the control signal output by the processing module, the coil KA of the relay and the freewheeling diode VD form a closed loop for releasing the energy stored in the coil KA of the relay to play a role in protecting the circuit.

It should be noted that, this patent application does not relate to the improvement of the computer software program itself, and each unit in the circuit schematic block diagram can use a standard unit module, which is essentially the improvement of the composition of the hardware part and the connection relationship thereof.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims

1. The charging fireproof device for the electric bicycle is characterized by comprising a processing module, a charging control module, a power supply conversion module and a temperature sensor for sensing the temperature of a charging electrode of a storage battery of the electric bicycle; the power supply conversion module can obtain electric energy from commercial power, supply power to each power utilization module and the temperature sensor in the fire protection device and charge the storage battery; a normally closed contact of a relay is also connected in series in a charging loop of the storage battery; the processing module can collect an electric signal transmitted by the temperature sensor, and judges that the normally closed contact of the relay is disconnected under the control of the charging control module when the temperature of the charging electrode of the storage battery is higher than the preset charging ignition critical temperature of the electric bicycle according to the electric signal.

2. The charging fire protection device for the electric bicycle according to claim 1, further comprising a user terminal and a communication module, wherein the processing module is in signal connection with the user terminal through the communication module, and when the temperature of the charging electrode of the storage battery is higher than a preset critical temperature for charging and igniting the electric bicycle, the processing module outputs an alarm signal to the user terminal through the communication module.

3. The charging fire protection device for electric bicycles of claim 1, wherein the temperature sensor is ring-shaped and is disposed on the charging electrode of the battery.

4. The charging fire protection device for the electric bicycle according to claim 3, wherein the temperature sensor is a DS18B20 temperature sensor.

5. The charging fire protection device for the electric bicycle according to claim 1, wherein the charging control module comprises a freewheeling diode and a triode, the freewheeling diode is connected in parallel with the coil of the relay, the negative pole of the freewheeling diode is electrically connected with the direct current output terminal of the power conversion module, and the positive pole of the freewheeling diode is electrically connected with the collector of the triode; the base electrode of the triode is electrically connected with the control signal output end of the processing module, and the emitting electrode of the triode is grounded.

6. The charging fire protection device for the electric bicycle according to claim 5, wherein a protection resistor is further connected in series between the base of the triode and the control signal output end of the processing module.

7. The charging fire protection device for the electric bicycle according to claim 2, wherein the communication module is a wired or wireless communication module.

8. The electric bicycle charging fire protection device of claim 2, wherein the user terminal comprises a display and a voice prompt module.