CN209888665U

CN209888665U - Rear energy storage device of electric automobile

Info

Publication number: CN209888665U
Application number: CN201920597097.7U
Authority: CN
Inventors: 陈海荣; 陈志杰; 逍遥
Original assignee: SHANGHAI HUANSHENG NEW ENERGY & TECHNOLOGY Co Ltd
Current assignee: SHANGHAI HUANSHENG NEW ENERGY & TECHNOLOGY Co Ltd
Priority date: 2019-04-28
Filing date: 2019-04-28
Publication date: 2020-01-03
Anticipated expiration: 2029-04-28

Abstract

The utility model discloses an electric automobile rear energy storage device, which comprises a voltage reduction rectifier module, a harmonic filtering module, a protection switch, a standby battery, a one-way electronic switch and a voltage detection module, wherein the input end of the voltage reduction rectifier module is connected with a mains supply, the output end of the voltage reduction rectifier module is connected with the harmonic filtering module, the output end of the harmonic filtering module is connected with the protection switch, and the protection switch is also respectively connected with the standby battery and a main battery, the design requirement of the backup battery can be reduced by indirectly supplying power through the main battery.

Description

Rear energy storage device of electric automobile

Technical Field

The utility model relates to an electric automobile technical field specifically is a rearmounted energy memory of electric automobile.

Background

The development of new energy automobiles in China is an important measure for reducing the fuel consumption of automobiles, relieving the contradiction between fuel supply and demand, reducing exhaust emission, improving atmospheric environment, promoting the technical progress of automobiles and optimizing and upgrading, and is also a requirement for the cross-over development of the automobile industry and the promotion of international competitiveness. In Europe and America, the new energy automobile is considered as a strategic high-point, and the country invests force to strengthen the development of the industry.

According to data of 2016 & 2021 year old market prospect and investment strategy planning analysis report of China New energy automobile industry, the industry research institute of the future, the output and sales of 134 thousands of new energy automobiles and 133 thousands of new energy automobiles in 2018 year, and the increase in the same ratio is 3.3 times and 3.4 times respectively. The new energy automobile sales volume in China surpasses the United states for the first time, and the new energy automobile market becomes the first new energy automobile market in the world. In 2019, 1 month, 5.6 thousands of new energy automobiles are produced in China, and the production is increased by 144% on a year-by-year basis.

The new energy automobile output and sale amount exceeds the market expectation, which benefits from the policy promotion of central and local governments and the transformation of the automobile owner consumption concept and the effort of automobile enterprises.

The biggest problem of the existing electric automobile is endurance, although the endurance mileage given by most electric automobiles is very high, the endurance mileage can be reached only in an ideal climate environment, the electric quantity of the electric automobile is reduced due to temperature reduction and time loss, the endurance mileage is further seriously affected, and the most typical situation is 2/3 with the maximum endurance mileage in rainy and snowy weather in winter. Therefore, many people equip the backup battery in the trunk of the electric automobile, but most of the existing backup batteries are directly used for supplying power and mostly need to be matched with all electric equipment of the electric automobile, so that the quality requirement is high, the quality of the backup battery needs to be the same as or even higher than that of the original main battery, and the use cost is high.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an electric automobile rearmounted energy memory, in order to solve the problem of proposing among the background art.

In order to realize the purpose, the utility model provides a following technical scheme:

the utility model provides a rear-mounted energy memory of electric automobile, includes step-down rectifier module, harmonic filtering module, protection switch, stand-by battery, one-way electronic switch and voltage detection module, mains power is connected to step-down rectifier module's input, and harmonic filtering module is connected to step-down rectifier module's output, and protection switch is connected to the output of harmonic filtering module, and stand-by battery and main battery are still connected respectively to protection switch, and voltage detection module is still connected to the main battery, and the main battery is still connected through one-way electronic switch to the stand-by battery, and voltage detection module still connects the main battery.

As a further aspect of the present invention: the voltage-reducing rectification module comprises a rectifier T and a transformer W, the harmonic filtering module adopts a pi-type filter, the protection switch comprises a resistor R1, a resistor R2 and a triode V1, the unidirectional electronic switch comprises a triode V2 and a diode D1, the voltage detection module comprises a resistor R4 and a resistor R5, a primary winding of the transformer W is connected with 220V alternating current, a secondary winding of the transformer W is connected with the rectifier T, an output port 2 of the rectifier T is connected with a port 1 of the pi-type filter, a port 2 of the pi-type filter is connected with an output port 4 of the rectifier T, a port 3 of the pi-type filter is connected with a collector of the triode V1 and a resistor R1, the other end of the resistor R1 is connected with a base of a resistor R2 and a base of a triode V1, an emitter of the triode V1 is connected with a switch S1 and a resistor R3, the other end of the resistor R8 is connected, The negative pole of the main battery E2, the capacitor C3, the resistor R5 and the port 4 of the pi-type filter, the other end of the switch S1 is connected with the emitter of the triode V2 and the positive pole of the backup battery E1, the collector of the triode V2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the positive pole of the main battery E2, the other end of the capacitor C3, the resistor R4 and the other end of the switch S2, and the other end of the resistor R4 is connected with the other end of the resistor R5 and the base of the triode V2.

As a further aspect of the present invention: the pi-type filter consists of an inductor L1, a capacitor C1 and a capacitor C2.

As a further aspect of the present invention: the diode D1 is a rectifier diode.

As a further aspect of the present invention: the triode V1 is an NPN triode, and the triode V2 is a PNP triode.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses electric automobile rear energy memory installs the reserve battery in electric automobile trunk, use with the original main battery cooperation of joining in marriage of electric automobile, only just can start under the not enough condition of electric automobile main battery voltage, charge for the main battery, increase electric automobile's continuation of the journey on the one hand, another party's reserve battery does not directly provide the power consumption part on the electric automobile, need not be as accurate as the main battery, indirectly supply power through the main battery, can reduce reserve battery's design demand.

Drawings

Fig. 1 is a schematic diagram of a rear energy storage device of an electric vehicle.

Fig. 2 is a circuit diagram of a rear energy storage device of an electric vehicle.

Fig. 3 is a circuit diagram of the filter.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-3, a rear energy storage device of an electric vehicle includes a step-down rectification module for AC-AC and AC-DC conversion, a harmonic filtering module for filtering harmonic interference, a protection switch for providing undervoltage protection, a backup battery, a unidirectional electronic switch, and a voltage detection module, wherein an input end of the step-down rectification module is connected to a mains supply, an output end of the step-down rectification module is connected to the harmonic filtering module, an output end of the harmonic filtering module is connected to the protection switch, the protection switch is further connected to the backup battery and a main battery respectively, the main battery is further connected to the voltage detection module, the backup battery is further connected to the main battery through the unidirectional electronic switch, and the voltage detection module is further connected to the main.

The specific circuit is as shown in fig. 2, the buck rectifying module includes a rectifier T and a transformer W, the harmonic filtering module adopts a pi-type filter, the protection switch includes a resistor R1, a resistor R2 and a triode V1, the unidirectional electronic switch includes a triode V2 and a diode D1, the voltage detecting module includes a resistor R4 and a resistor R5, the primary winding of the transformer W is connected with 220V alternating current, the secondary winding of the transformer W is connected with the rectifier T, the output port 2 of the rectifier T is connected with the port 1 of the pi-type filter, the port 2 of the pi-type filter is connected with the output port 4 of the rectifier T, the port 3 of the pi-type filter is connected with the collector of the triode V1 and the resistor R1, the other end of the resistor R1 is connected with the resistor R2 and the base of the triode V1, the emitter of the triode V1 is connected with the switch S1 and the resistor R2, the other end of the resistor R3 is connected with, The negative pole of the main battery E2, the capacitor C3, the resistor R5 and the port 4 of the pi-type filter, the other end of the switch S1 is connected with the emitter of the triode V2 and the positive pole of the backup battery E1, the collector of the triode V2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the positive pole of the main battery E2, the other end of the capacitor C3, the resistor R4 and the other end of the switch S2, and the other end of the resistor R4 is connected with the other end of the resistor R5 and the base of the triode V2.

A transformer W in the circuit finishes voltage reduction, a rectifier T converts alternating current into direct current, a pi-type filter can filter harmonic interference in a power grid, a resistor R1 and a resistor R2 form a voltage division module to detect input voltage, and the divided voltage controls the conduction state of an NPN triode V1, so that when the divided voltage is not enough to meet the conduction of the NPN triode V1, the following circuit cannot supply power to achieve the purpose of under-voltage protection, and when the power supply is normal, a standby battery E1 and a main battery E2 can be selectively charged, and simultaneously, a resistor R4 and a resistor R5 are used for detecting the voltage of the main battery E2, when the voltage of a storage battery E2 is detected to be insufficient, the voltage output to the triode V2 can also be reduced to the conduction threshold of the PNP triode, at the moment, a PNP diode V2 is conducted, the standby battery E2 charges the main battery E through a diode D1, so that the continuation of the, the other side of the backup battery is not directly provided for the electricity utilization part on the electric automobile, does not need to be as precise as a main battery, and indirectly supplies electricity through the main battery, so that the design requirement of the backup battery can be reduced.

Example 2: on the basis of embodiment 1, the pi-type filter of this design comprises inductance L1, electric capacity C1 and electric capacity C2, as shown in fig. 3, its simple structure, the cost of manufacture is low, and there is ripe chip purchase on the market, can filter most clutter interference, increases circuit stability.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides a rear-mounted energy memory of electric automobile, includes step-down rectifier module, harmonic filtering module, protection switch, backup battery, one-way electronic switch and voltage detection module, a serial communication port, mains power is connected to step-down rectifier module's input, and harmonic filtering module is connected to step-down rectifier module's output, and protection switch is connected to the output of harmonic filtering module, and backup battery and main battery are still connected respectively to protection switch, and voltage detection module is still connected to the main battery, and backup battery still connects the main battery through one-way electronic switch, and voltage detection module still connects the main battery.

2. The rear energy storage device of the electric vehicle as claimed in claim 1, wherein the buck rectifier module comprises a rectifier T and a transformer W, the harmonic filter module adopts a pi-type filter, the protection switch comprises a resistor R1, a resistor R2 and a transistor V1, the unidirectional electronic switch comprises a transistor V2 and a diode D1, the voltage detection module comprises a resistor R4 and a resistor R5, a primary winding of the transformer W is connected with 220V ac, a secondary winding of the transformer W is connected with the rectifier T, an output port 2 of the rectifier T is connected with a port 1 of the pi-type filter, a port 2 of the pi-type filter is connected with an output port 4 of the rectifier T, a port 3 of the pi-type filter is connected with a collector and a resistor R1 of the transistor V1, the other end of the resistor R1 is connected with a resistor R2 and a base of the transistor V1, an emitter of the transistor V1 is connected with a switch S38, the other end of the resistor R3 is connected with the switch S2, the other end of the resistor R2 is connected with the negative electrode of the backup battery E1, the negative electrode of the main battery E2, the capacitor C3, the resistor R5 and the port 4 of the pi-type filter, the other end of the switch S1 is connected with the emitter of the triode V2 and the positive electrode of the backup battery E1, the collector of the triode V2 is connected with the anode of the diode D1, the cathode of the diode D1 is connected with the positive electrode of the main battery E2, the other end of the capacitor C3, the resistor R4 and the other end of the switch S2, and the other end of the resistor R4 is connected with the other end of the resistor.

3. The rear energy storage device of the electric automobile as claimed in claim 2, wherein the pi filter is composed of an inductor L1, a capacitor C1 and a capacitor C2.

4. The rear energy storage device of the electric automobile as claimed in claim 2, wherein the diode D1 is a rectifier diode.

5. The rear energy storage device of an electric vehicle as claimed in any one of claims 2 to 4, wherein the transistor V1 is an NPN transistor, and the transistor V2 is a PNP transistor.