CN207541237U - A kind of battery life judgment means based on lithium battery self-healing phenomenon - Google Patents
A kind of battery life judgment means based on lithium battery self-healing phenomenon Download PDFInfo
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- CN207541237U CN207541237U CN201721719195.0U CN201721719195U CN207541237U CN 207541237 U CN207541237 U CN 207541237U CN 201721719195 U CN201721719195 U CN 201721719195U CN 207541237 U CN207541237 U CN 207541237U
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Abstract
The utility model discloses a kind of battery life judgment means based on lithium battery self-healing phenomenon, including lithium battery to be measured, current sample chip, A/D analog-digital converters, microcontroller, liquid crystal display and buzzer siren, it is characterised in that：The microcontroller is electrically connected with A/D analog-digital converters, and the microcontroller is electrically connected with current sample chip, and the current sample chip is electrically connected with lithium battery, and the liquid crystal display and buzzer siren are electrically connected respectively with microcontroller.In order to be preferably managed to battery, battery life is detected in real time, improves the safety of battery, the phenomenon that the utility model is based on lithium battery self-healing, utilize the voltage difference and the relationship of battery life before and after self-healing procedure, it is proposed that new battery life judgment method.This method can be with on-line checking battery life, and conveniently and fast.
Description
Technical field
The utility model belongs to more particularly to a kind of battery life judgment means based on lithium battery self-healing phenomenon.
Background technology
As global energy and environmental crisis increasingly aggravate, the development of new energy becomes energy development strategy with expanding application
On mainstream.Outstanding advantages of electric vehicle is due to energy saving, low noise, low emission, the configurable energy, becomes Automobile Transportation
The hot spot of area research.Development of EV is total in energy with energy saving and environmentally friendly double benefit, especially pure electric automobile
It has a clear superiority in terms of transfer efficiency and the total discharge of pollution, is the developing direction of future automobile industry.Lithium ion battery conduct
The advantages that energy source of electric vehicle has voltage high, has extended cycle life, higher than energy, and specific power is high, therefore in many necks
Domain is widely used, and is the core of ev industry chain.
Lithium battery is during charge and discharge cycles use, by factors such as temperature, self-discharge rate, depth of discharge, discharge-rates
Influence, capacity and service life constantly decay.When battery capacity falls to the 80% of initial capacity, the performance of battery will be unable to
Meet power supply technique requirement, it is necessary to be safeguarded or be replaced, otherwise can bring serious harm to electric vehicle and personal safety.
Therefore, it is necessary to which the remaining life to lithium battery is analyzed and researched, to maximally utilise the residual capacity of battery, protect
Barrier safety.
Nowadays, the common method for judging service life of lithium battery has electrochemical methods, ampere-hour method, impedance method etc..Electrochemistry
Kinetic parameter, mass transport process, the thermodynamic behaviour that the angle of analytic approach from inside battery physical and chemical process describes battery are joined
The changing rule of the parameters such as number, the machinery of material, heat, electrical characteristics analyzes the operation mechanism of battery and establishes the degeneration mould of battery
Type judges battery life；Ampere-hour method carries out various accelerated tests in the life cycle management of battery to battery, i.e., according to certain electric discharge
Efficiency electric discharge periodically tests battery capacity, judges battery life；Impedance method is by adding in a load resistance, measuring
The variation of internal resistance for changing to determine battery of voltage simultaneously calculates SOH accordingly, judges battery life.However these types of method is not
Has online the characteristics of judging battery life, it is impossible to detect battery life in real time.
Utility model content
The purpose of this utility model is to provide one kind can be with on-line checking battery life, and conveniently and is efficiently based on lithium electricity
The battery life judgment means of pond self-healing phenomenon.
In order to solve the above-mentioned technical problem, the technical solution of the utility model is：
A kind of battery life judgment means based on lithium battery self-healing phenomenon, including lithium battery to be measured, current sample chip,
A/D analog-digital converters, microcontroller, liquid crystal display and buzzer siren, the microcontroller electrically connect with A/D analog-digital converters
It connects, the microcontroller is electrically connected with current sample chip, and the current sample chip is electrically connected with lithium battery, the liquid crystal
Display and buzzer siren are electrically connected respectively with microcontroller.
Preferably, the current sample chip, A/D analog-digital converters, singlechip group are into signal processing module.
Preferably, the liquid crystal display and buzzer siren component devices show alarm module.
Preferably, in lithium battery discharge process, switch is disconnected, when current sample chip can't detect current signal
When, then judge that lithium battery is in as off working state, and will determine that result is exported to microcontroller, microcontroller control A/D moduluses turn
Parallel operation is run, and detects the voltage signal of lithium battery power-cut time；When switch is closed, current sample chip detects current signal,
Judge that lithium battery is in running order, will determine that result is exported to microcontroller, microcontroller control A/D analog-digital converter operations, inspection
The voltage signal at lithium battery energization moment is measured, in order to reduce error, A/D analog-digital converters are when detecting lithium battery voltage signal
The voltage signal that detection is needed to be powered in moment and power-cut time and its neighborhood, takes its average value.A/D analog-digital converters will be powered
The voltage signal of moment and power-cut time is exported simultaneously to microcontroller, and microcontroller passes through calculation process, finally by the result of processing
Intuitively show on a liquid crystal display, if finally detecting obtained lithium battery remaining life not within safe range,
Alarm signal can be then sent out by buzzer siren, people is reminded to replace battery in time, so as to reach detection service life of lithium battery
Purpose.
The utility model has the technical effect that following aspect：It is right in real time in order to be preferably managed to battery
The phenomenon that battery life is detected, and improves the safety of battery, and the utility model is based on lithium battery self-healing, utilizes self-healing procedure
Front and rear voltage difference and the relationship of battery life, it is proposed that new battery life judgment method.This method can be examined online
Battery life is surveyed, and conveniently and fast.
Description of the drawings
Fig. 1 is lithium battery self-healing procedure curve；
Fig. 2 is the circuit diagram of the battery life judgment means based on lithium battery self-healing phenomenon of the utility model；
Fig. 3 is the lcd display principles figures of the utility model；
Fig. 4 is the buzzer siren schematic diagram of the utility model.
Specific embodiment
As shown in Figures 1 to 4, a kind of battery life judgment means based on lithium battery self-healing phenomenon, including lithium to be measured electricity
Pond, current sample chip, A/D analog-digital converters, microcontroller, liquid crystal display and buzzer siren, it is characterised in that：The list
Piece machine is electrically connected with A/D analog-digital converters, and the microcontroller is electrically connected with current sample chip, the current sample chip
It is electrically connected with lithium battery, the liquid crystal display and buzzer siren are electrically connected respectively with microcontroller.
The current sample chip, A/D analog-digital converters, singlechip group are responsible for the processing of signal into signal processing module.
Current sample chip can whether to there is the size of electric current in electric current and circuit in detection circuit, come decision circuitry be open circuit or
It is closed circuit；A/D analog-digital converters can obtain the voltage signal of lithium battery, and the analog signal got is converted into digital letter
Number, it is output to microcontroller；The effect of microcontroller is processing voltage signal, and lithium battery remaining life is obtained using voltage signal.Institute
It states liquid crystal display and buzzer siren component devices shows alarm module, liquid crystal display can intuitively show the knot of detection
Fruit
In lithium battery discharge process, switch is disconnected, when current sample chip can't detect current signal, then judges lithium
It is off working state that battery, which is in, and will determine that result is exported to microcontroller, microcontroller control A/D analog-digital converter operations, inspection
Survey the voltage signal of lithium battery power-cut time；When switch is closed, current sample chip detects current signal, judges at lithium battery
In working condition, it will determine that result is exported to microcontroller, microcontroller control A/D analog-digital converter operations detect that lithium battery leads to
The voltage signal at electric moment, in order to reduce error, A/D analog-digital converters need detection to be powered when detecting lithium battery voltage signal
Voltage signal in moment and power-cut time and its neighborhood takes its average value.When A/D analog-digital converters will be powered the moment with powering off
The voltage signal at quarter is exported simultaneously to microcontroller, and microcontroller passes through calculation process, finally by the visual result of processing in liquid crystal
It is showed on display, if finally detecting obtained lithium battery remaining life not within safe range, buzzing can be passed through
Alarm sends out alarm signal, and people is reminded to replace battery in time, so as to achieve the purpose that detect service life of lithium battery.
Technical principle：By experiment, mass data is measured, the data measured are integrated into out service life of lithium battery using matlab
With the relational expression between self-healing procedure voltage difference, the relationship between voltage difference before and after service life of lithium battery and lithium battery self-healing is as follows
It is shown
τ=f (u), u12=u1-u2, u34=u3-u4…unn+1=un-un+1
Wherein τ be lithium battery remaining life, u12For the voltage difference before and after first time self-healing procedure, u23For second certainly
More the voltage difference before and after process, unn+1For the voltage difference before and after n-th self-healing procedure.The conditional curve of lithium battery self-healing is such as
Shown in Fig. 1.
Using the relational design of lithium battery self-healing and service life of lithium battery it is more convenient, can detect in real time service life of lithium battery, should
With the higher service life of lithium battery determining device of property.Following factor is the key that the method for realizing detection service life of lithium battery in real time：
(1) design of signal processing module；
(2) design of alarm module is shown；
A whole set of detecting system has the characteristics that timeliness, it is desirable that each module will reach detection, Real-time Feedback in real time
Effect.
The utility model is from the principle of lithium battery self-healing, judges service life of lithium battery.The present apparatus makes simple, application
It is convenient, lithium battery can be detected in real time, judge service life of lithium battery, and reported when battery life is undesirable
It is alert, it reminds and replaces lithium battery in time, there is higher safety and practicability.
The above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any change or replacement expected without creative work should be covered within the scope of the utility model.
Claims (3)
1. a kind of battery life judgment means based on lithium battery self-healing phenomenon, including lithium battery to be measured, current sample chip, A/
D analog-digital converters, microcontroller, liquid crystal display and buzzer siren, it is characterised in that：The microcontroller and A/D analog-to-digital conversions
Device is electrically connected, and the microcontroller is electrically connected with current sample chip, and the current sample chip is electrically connected with lithium battery,
The liquid crystal display and buzzer siren are electrically connected respectively with microcontroller.
2. a kind of battery life judgment means as described in claim 1 based on lithium battery self-healing phenomenon, it is characterised in that：Institute
Current sample chip, A/D analog-digital converters, singlechip group are stated into signal processing module.
3. a kind of battery life judgment means as described in claim 1 based on lithium battery self-healing phenomenon, it is characterised in that：Institute
It states liquid crystal display and buzzer siren component devices shows alarm module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201721719195.0U CN207541237U (en) | 2017-12-12 | 2017-12-12 | A kind of battery life judgment means based on lithium battery self-healing phenomenon |
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| CN201721719195.0U CN207541237U (en) | 2017-12-12 | 2017-12-12 | A kind of battery life judgment means based on lithium battery self-healing phenomenon |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843851A (en) * | 2017-12-12 | 2018-03-27 | 首都师范大学 | A kind of battery life judgment means and its application method based on lithium battery self-healing phenomenon |
| CN111208431A (en) * | 2020-01-07 | 2020-05-29 | 天津市捷威动力工业有限公司 | Lithium ion battery all-weather calendar life prediction method for electric automobile |
-
2017
- 2017-12-12 CN CN201721719195.0U patent/CN207541237U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843851A (en) * | 2017-12-12 | 2018-03-27 | 首都师范大学 | A kind of battery life judgment means and its application method based on lithium battery self-healing phenomenon |
| CN111208431A (en) * | 2020-01-07 | 2020-05-29 | 天津市捷威动力工业有限公司 | Lithium ion battery all-weather calendar life prediction method for electric automobile |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180626 Termination date: 20211212 |