CN205427157U

CN205427157U - Discharge detection system of battery

Info

Publication number: CN205427157U
Application number: CN201520661940.5U
Authority: CN
Inventors: 陈宇星; 陈健
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-08-28
Filing date: 2015-08-28
Publication date: 2016-08-03
Anticipated expiration: 2025-08-28

Abstract

The application discloses discharge detection system of battery, this discharge detection system at first acquire the magnitude of voltage that holds battery output voltage, and then carry out the comparison to this magnitude of voltage and predetermined voltage threshold value, continue to acquire the magnitude of voltage when the magnitude of voltage is not higher than this voltage threshold value to be discrete voltage curve with the magnitude of voltage transform that continues to acquire, it is not to be in the discharge condition then to show like the voltage curve invariant that should disperse, the voltage curve non -constant if disperse, and progressively reduce after transient state and judge then that this battery is in the entering discharge condition. Thereby the discharge detection system of battery that this application provided can utilize discharge voltage's change curve to get into the discharge condition to the battery in time to be judged.

Description

A kind of discharging detecting system of accumulator

Technical field

The application relates to cell art, more particularly, it relates to the discharging detecting system of a kind of accumulator.

Background technology

Accumulator is widely used in as electrical energy storage device on the vehicles such as automobile, train, boats and ships, and also it is the energy storage device of uninterrupted power source lamp electric supply installation, in some application, the performances such as the capacity of accumulator, internal resistance must be detected, therefore, it is necessary to determine whether this accumulator is in discharge condition detecting performance when.

Utility model content

In view of this, the application provides the discharging detecting system of a kind of accumulator, for whether accumulator is in discharge condition detects.

To achieve these goals, it is proposed that scheme as follows:

A kind of discharging detecting system of accumulator, including:

For obtaining the magnitude of voltage acquisition device of the magnitude of voltage of the output voltage of described accumulator；

For judging whether to be less than described magnitude of voltage the first judge module of the voltage threshold value preset, for the output discrete transform signal when described magnitude of voltage is less than described voltage threshold value；

For according to described discrete transform signal by discrete transform module that described voltage values is discrete voltage curve；

For judging the second judge module that described discrete voltage curve is the most constant, as constant output terminates to judge signal, otherwise output machine continues to judge signal；

For judging that accumulator described in signal determining is not in the first determination module of discharge condition according to described end；

For judging that signal carries out the second determination module continuing to judge to described discrete voltage curve, for judging that described accumulator is in discharge regime when described discrete voltage curve gradually reduces according to described end.

Optionally, described magnitude of voltage acquisition device includes:

For connecting the positive pole of described accumulator, negative pole respectively, and for the voltage detecting circuit that the output voltage of described accumulator is detected, described voltage detecting circuit is provided with signal output part, and described signal output part is for exporting the voltage signal reflecting described output voltage；

It is connected with the signal output part of described voltage detecting circuit, for described voltage signal being carried out analog digital conversion and exporting the analog to digital conversion circuit of described magnitude of voltage.

Optionally, the described voltage threshold value of each battery cell is between 0.5～2.333V.

Can be seen that from above-mentioned technical scheme, this application discloses the discharging detecting system of a kind of accumulator, first this discharging detecting system obtains the magnitude of voltage of the output voltage of accumulator, the most again this magnitude of voltage is compared with the voltage threshold value preset, continue when magnitude of voltage is not higher than this voltage threshold value to obtain magnitude of voltage, and by continue obtain voltage values be discrete voltage curve, as constant in this discrete voltage curve, show to be not in discharge condition, as non-constant in discrete voltage curve, and gradually reduce after transient state, judge that this accumulator is in entrance discharge condition.Thus accumulator entrance discharge condition is judged by change curve that the discharging detecting system of accumulator provided herein can utilize discharge voltage in time.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present application or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in describing below is only some embodiments of the application, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.

The discharge characteristic curve figure of a kind of accumulator that Fig. 1 provides for the application；

The schematic diagram of the discharging detecting system of a kind of accumulator that Fig. 2 provides for the embodiment of the present application；

The schematic diagram of the another kind of discharging detecting system that Fig. 3 provides for the application；

The schematic diagram of the discharging detecting system of a kind of accumulator that Fig. 4 provides for another embodiment of the application.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present application, the technical scheme in the embodiment of the present application is clearly and completely described, it is clear that described embodiment is only some embodiments of the present application rather than whole embodiments.Based on the embodiment in the application, the every other embodiment that those of ordinary skill in the art are obtained under not making creative work premise, broadly fall into the scope of the application protection.

Nominal voltage is that the accumulator of 12V is typically when carrying out floating charge, when being in backup mode in other words, its output voltage is typically in certain constant voltage values Vbat between 13～15 volts, as shown in Figure 1, after entering start-up mode, its output voltage is typically in certain magnitude of voltage between 11～13 volts, when accumulator after discharge is started, its output voltage can be less than certain magnitude of voltage Vref.The application i.e. utilizes this characteristic of accumulator whether it is entered discharge regime and detects, and concrete technical scheme sees below provided embodiment.

Embodiment one

The schematic diagram of the discharging detecting system of a kind of accumulator that Fig. 2 provides for the embodiment of the present application.

As in figure 2 it is shown, the discharging detecting system that the present embodiment provides includes magnitude of voltage acquisition device 10 and processor 20, the signal output part of magnitude of voltage acquisition device 10 is connected with the corresponding port of processor 20.

Magnitude of voltage acquisition device 10 is for detecting the voltage between positive pole and the negative pole of the outfan of accumulator 100, obtain the output voltage of this accumulator 100, then obtain reflecting the magnitude of voltage of the voltage levels numerical value of this output voltage according to this output voltage, and this magnitude of voltage is exported processor 20 by its signal output part.

First the magnitude of voltage obtained is compared by processor 20 with the voltage threshold value preset, if this magnitude of voltage is higher than this voltage threshold value, then explanation accumulator is not at discharge regime, although being in backup mode in other words or being in start-up mode but enter stop phase.When this magnitude of voltage is less than this voltage threshold value, the magnitude of voltage continuing to obtain being carried out discrete voltage curve conversion, then to this, discrete voltage curve is the most constant judges.If this discrete voltage curve is constant, judge that this accumulator is not in discharge condition, if discrete voltage curve is non-constant and gradually reduces after a transient state, judge that this accumulator is in discharge condition.

From technique scheme it can be seen that present embodiments provide the discharging detecting system of a kind of accumulator, this discharging detecting system includes magnitude of voltage acquisition device and processor, and magnitude of voltage acquisition device is for obtaining the magnitude of voltage of the output voltage of accumulator.Processor is for comparing with the voltage threshold value preset this magnitude of voltage, continue when magnitude of voltage is not higher than this voltage threshold value to obtain magnitude of voltage, and by continue obtain voltage values be discrete voltage curve, as constant in this discrete voltage curve, show to be not in discharge condition, as non-constant in discrete voltage curve, and gradually reduce after transient state, judge that this accumulator is in entrance discharge condition.Thus accumulator entrance discharge condition is judged by change curve that the discharging detecting system of accumulator provided herein can utilize discharge voltage in time.

The voltage threshold voltage that technique scheme is mentioned is preferably in certain magnitude of voltage in the range of 0.5～2.333V/ battery cell, and the selection of occurrence specifically determines according to performance and the parameter of accumulator 100.

Magnitude of voltage acquisition device 10 in the present embodiment includes voltage detecting circuit D1 and analog to digital conversion circuit ADC, as shown in Figure 3.

Voltage detecting circuit D1 is connected with positive pole, the negative pole of accumulator 100 respectively, for detecting the output voltage of accumulator 100, thus obtains reflecting the voltage signal of this output voltage, and this voltage signal is analog quantity.

The signal input part of analog to digital conversion circuit ADC is connected with the signal output part of voltage detecting circuit 10, carries out analog digital conversion for the voltage signal obtaining voltage detecting circuit D1, obtains digitized magnitude of voltage.

Embodiment two

As shown in Figure 4, the discharging detecting system that the present embodiment provides is to be additionally arranged the comparison circuit that signal output part is connected with the interruptive port INT of processor 20 on the basis of a upper embodiment.

Magnitude of voltage acquisition device 10 in the present embodiment is engraved in work when not being, the most more wastes the resource of processor 20, i.e. processor 20 is in order at resting state at ordinary times, recovers the detection to magnitude of voltage again when there is certain event.

The positive input of this comparison circuit D2 is connected with the positive pole of accumulator 100, and for receiving the output voltage of accumulator, reverse input end receives the threshold voltage Vref preset.Certain magnitude of voltage between this threshold voltage Vref preferably 0.5～2.333V/ battery cell, occurrence is chosen according to the characteristic of accumulator 100.

After accumulator 100 starts electric discharge, its output voltage can be less than this threshold voltage, and at this moment the output signal of comparison circuit D2 becomes low level signal from high level signal, will export processor 20 as sampling execution signal by this jump signal.

Processor 20 receives this sampling and performs to perform after signal corresponding interrupt routine and control magnitude of voltage acquisition device 10 and recover the magnitude of voltage of detection accumulator, and according to magnitude of voltage, whether accumulator is in discharge regime further and judges.

Compared to for the discharging detecting system that a upper embodiment provides, when accumulator 100 is with the load of the transient large current discharges such as motor, need quickly to judge when whether it occurs electric discharge, data possibly cannot be processed by this system in time, and the present embodiment offer discharging detecting system then can quickly respond the change of the output voltage of accumulator 100.It is thus possible to whether detection accumulator enters discharge regime quickly.

In this specification, each embodiment uses the mode gone forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, and between each embodiment, identical similar portion sees mutually.Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses the application.Multiple amendment to these embodiments will be apparent from for those skilled in the art, and generic principles defined herein can realize in the case of without departing from spirit herein or scope in other embodiments.Therefore, the application is not intended to be limited to the embodiments shown herein, and is to fit to the widest scope consistent with principles disclosed herein and features of novelty.

Claims

1. the discharging detecting system of an accumulator, it is characterised in that including:

2. discharging detecting system as claimed in claim 1, it is characterised in that described magnitude of voltage acquisition device includes:

3. discharging detecting system as claimed in claim 1, it is characterised in that the described voltage threshold value of each battery cell is between 0.5～2.333V.