CN102508170A - Method for monitoring capacity of storage battery - Google Patents

Method for monitoring capacity of storage battery Download PDF

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Publication number
CN102508170A
CN102508170A CN2011103516102A CN201110351610A CN102508170A CN 102508170 A CN102508170 A CN 102508170A CN 2011103516102 A CN2011103516102 A CN 2011103516102A CN 201110351610 A CN201110351610 A CN 201110351610A CN 102508170 A CN102508170 A CN 102508170A
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accumulator
capacity
discharge
current
user
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CN102508170B (en
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丁国营
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丁国营
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Abstract

The invention discloses a method for monitoring capacity of a storage battery. The method comprises the following steps of: 1) judging whether the current storage battery is fully charged or not in a charging process; and 2) judging whether the current storage battery is fully discharged in a discharging process. The method can provide a real-time and accurate capacity value for a storage battery user; and by the method, the storage battery user can judge whether the current storage battery meets the requirement of the user or not; when the floating time of the storage battery in the charging process is long, the charging energy is wasted, and when the over discharge frequency of the storage battery in the discharging process is great, the service life of the storage battery is shortened; and the method can provide scientific and accurate judgment for the storage battery user so as to avoid the phenomena of floating, over discharge and the like.

Description

A kind of accumulator capacity monitoring method
Technical field
The present invention relates to the precise monitoring method of accumulator capacity and accumulator user mode, belong to the battery technology field.
Background technology
The equipment or the function that exist multiple accumulator capacity to show on the market, its main measuring method all are to be measurement parameter through terminal voltage.But because accumulator in use, the floating charge phenomenon occurs through regular meeting, also phenomenon can often occur putting, simultaneously, the terminal voltage of accumulator is a nonlinearities change in discharge or charging process, is difficult to accurately measure the actual capacity of accumulator.
For rechargeable battery, the number of times that whole industry also fully discharges and recharges when monitoring mostly is as the important criterion of rechargeable battery quality.But its capacity all can change because accumulator is use later at every turn, that is to say that the electric weight of each ability storage or release all can be different, and simple use recycles number of times, is not enough to accurately and scientifically pass judgment on the quality of accumulator quality.
Because above-mentioned two material impact factors; Accumulator in actual use; All be by safeguarding certain service time or upgrading; This virtually accumulators manufacturer and accumulator user caused a large amount of unnecessary wastes, meanwhile, the accumulator user also can't accurately systematically understand the state of presently used accumulator.
Summary of the invention
Technical matters to be solved by this invention is the data message that employed battery condition effectively is provided for the accumulator user real time exactly.
For solving the problems of the technologies described above, the invention provides a kind of accumulator capacity monitoring method, may further comprise the steps:
1) battery monitor is surveyed parameter initialization:
The capacity of accumulator is variable C (s) when 11) defining this and completely fill;
12) be defined in t constantly the residual capacity of accumulator be variable C (p);
13) definition Δ t is the current acquisition time granularity of accumulator;
2) judge in the charging process whether current accumulator has been fully charged state:
Utilize formula (1) to calculate charging unit interval volume change rate ε
ϵ = ∫ t t + Δ t I ( t ) Dt / C ( s ) ; Formula (1)
If ε≤μ 1, be judged as accumulator and be in fully charged state;
3) judge in the discharge process whether current accumulator has been discharge fully:
Utilize formula (2) to calculate discharge unit interval volume change rate Φ
Φ = ∫ t t + t I ( t ) Dt / C ( s ) ; Formula (2)
If: Φ≤μ 2, and be judged as accumulator and be in complete discharge condition,
Wherein: I (t) is the electric current of accumulator t charge or discharge constantly;
is the ampere-hour capacity of accumulator t charge or discharge constantly;
Volumetric standards, i.e. unit interval granularity inner capacities rate of change when the accumulator that μ 1 sets for the user completely fills; The volumetric standards when accumulator that μ 2 sets for the user discharges fully.
The beneficial effect that the present invention reached is:
Accurate capacity algorithm provided by the invention can provide in real time capability value accurately for the accumulator user, also can judge whether current accumulator meets consumers' demand for the accumulator user simultaneously; Accumulator in charging process the floating charge time more length can cause the waste of rechargeable energy; Accumulator is crossed in discharge process and is put that number of times is more can to cause shortening of accumulator serviceable life; The present invention can judge for the accumulator user provides science accurately, phenomenon such as puts to avoid floating charge with crossing.
Detection provided by the invention and monitoring system not only can provide the basis for estimation of accumulator user mode for the accumulator user, can quantitative accumulator quality quality judgment criteria be provided for the accumulator user simultaneously; Even can provide a cover brand-new accumulator quality evaluating standard for whole battery industry;
Accumulator has been modern society's important energy source supply mode of Future Society especially, is widely used in all trades and professions.Accumulator exerts heavy pressures on also for the living environment of human society when facilitating for human society.
After having used the present invention; The pattern of whole battery service and renewal will change; Pressing originally criticized by safeguarding service time or upgrading; Will become by only safeguarding or upgrade that this not only can effectively reduce accumulator user's cost of investment, also can effectively reduce accumulator and pollute the environmental pressure that causes to human society by current actual user mode.
Description of drawings
Fig. 1 be in the inventive method in the battery charging process electric current change synoptic diagram;
Fig. 2 be in the inventive method in the battery-operated discharge process electric current change synoptic diagram;
Fig. 3 is an accumulator real surplus calculation of capacity synoptic diagram in the inventive method;
Fig. 4 be in the inventive method in the use of accumulator several times actual capacity change synoptic diagram;
Fig. 5 is the structural representation of monitoring system in the embodiment of the invention;
Fig. 6 is the calculation process synoptic diagram in the inventive method.
Embodiment
Accumulator capacity monitoring method of the present invention may further comprise the steps:
The first step:, specifically comprise but do not limit the setting of following parameters for the user provides automatically or the setting of self-defining measurement parameter:
The volumetric standards automatic or self-defined setting accumulator completely fills;
The volumetric standards automatic or self-defined setting accumulator discharges fully;
The time granularity of accumulator capacity is accurately measured in automatic or self-defined setting;
The automatic perhaps numerical computation method of self-defined setting accumulator capacity (N continuous time cubic content measurement average recently);
The volumetric standards of automatic perhaps self-defined setting battery condition (good, general, as to lose efficacy);
Second step: the measurement parameter of setting according to the user calculates, and specifically comprises but do not limit following parameters calculating:
The volumetric standards that the accumulator of setting according to the user completely fills judges whether accumulator completely fills, and calculates the capacity after this time completely filling;
Whether the volumetric standards that the accumulator of setting according to the user discharges is fully judged accumulator discharge fully, and is calculated the residual capacity after this time discharging fully;
The data computation method of the accumulator capacity of setting according to the user calculates the actual active volume of current accumulator;
The 3rd step: the time granularity of the accurate measurement accumulator capacity of setting according to the user; While is according to the electric current of the charge/discharge of measuring in real time; Calculate the changing value of the accumulator capacity of current time charge/discharge, thereby further, calculate the current capacity of accumulator;
Again and further, changing value and current capacity according to calculating according to current accumulator capacity calculate charge;
The 4th step: the volumetric standards of the battery condition of setting according to the user, judge the current state of accumulator;
Preferably, further comprise:
The electric current of accurately measuring charge in batteries or discharge in real time is the necessary basis of all measurements and calculations parameters;
The volumetric standards that the accumulator that the user sets completely fills is defined as, and in some special times of past (Δ t hour), charging current changing value (Δ I) or charging capacity changing value infinitely approach the value of certain setting.
The volumetric standards that the accumulator that the user sets discharges fully is defined as, and in some special times of past (Δ t hour), discharge current changing value (Δ I) or discharge capacity changing value infinitely approach the value of certain setting.
A complete accumulator completely fill with complete discharge process in, can have charge or discharge process repeatedly; Corresponding ground in carrying out current accumulator capacity computation process, need repeatedly add or deduct the volume change value.
Judging the volumetric standards of battery condition, can be that the capacity average is filled in measured the expiring of one or many in the past;
The monitoring system that accumulator capacity among the present invention is accurately measured specifically includes but not limited to following functional module:
Data acquisition function, the data owner of collection will comprise the current information of the time granularity collection of setting by the user;
Data-transformation facility is through the real-time data that transmission collected of wired or wireless transmission mode;
The data integration Presentation Function is through outputing to display terminal to monitor current accumulator user mode to the data that collect in real time after analyzing;
Preferably, further comprise:
Monitored accumulator can be single accumulator, also can be a group storage battery;
Data transmission comprises data necessary transmission and Data Receiving function or device;
The data that are transmitted can be the raw data that collects, and also can be through the data after analyzing;
Each function in the system can integratedly realize, also can independently realize through hardware device independently.
In view of present invention focuses on accurate calculation of capacity, describe below in conjunction with the concrete computation process and the enforcement of accompanying drawing to algorithm of the present invention.
Before carrying out the algorithm principle explanation, set following several common variable:
The electric current of accumulator t charge or discharge constantly is defined as I (t);
The current acquisition time granularity of accumulator is defined as Δ t;
The ampere-hour capacity of accumulator t charge or discharge constantly is defined as
Fig. 1 changes synoptic diagram for electric current in the battery charging process in the algorithm of the present invention, and from this synoptic diagram, we can find out; When completely filling; Electric current changes more and more littler, and thus, we can be according to the standard of filling that expires of user's setting; Judge the current fully charged state that whether has been, concrete computation process:
ϵ = ∫ t t + Δ t I ( t ) Dt / C ( s ) ; Formula (1)
If ε≤μ 1, be judged as accumulator and be in fully charged state;
I among the figure (s): accumulator initiation of charge electric current; I (t): accumulator t is charging current constantly; I (p): accumulator is full of charging current.
Fig. 2 changes intention for electric current in the battery-operated discharge process in the algorithm of the present invention, and from this synoptic diagram, we can find out; When discharging fully; Change in current is increasing equally, likewise, and can be according to the discharge standard fully of user's setting; Judge the current discharge fully that whether has been, concrete computation process:
Utilize formula (2) to calculate discharge unit interval volume change rate Φ
Φ = ∫ t t + t I ( t ) Dt / C ( s ) ; Formula (2)
If: Φ≤μ 2, and be judged as accumulator and be in complete discharge condition,
I among the figure (s): the initial working current of accumulator; I (t): accumulator t is working current constantly; I (p): accumulator can't working current.
Fig. 3 is accumulator real surplus calculation of capacity synoptic diagram in the algorithm of the present invention and since expiring of one whole fill with discharge process fully in, possibly have repeatedly charging and discharge process, but the computing method of its actual residual capacity are consistent, we define:
When this completely filled, the capacity of accumulator was defined as variable C (s);
At t constantly, the residual capacity of accumulator is defined as variable C (p);
In the special time, promptly in [t~tx], the variation of accumulator capacity is defined as in the past:
ΔC = ∫ t tx I ( t ) dt ;
Calculating the tx residual capacity of accumulator constantly, can be through following computing formula:
C(p)=C(s)±ΔC;
C among the figure (s): the initial ampere-hour capacity of accumulator; C (t): accumulator t has used ampere-hour capacity constantly; C (p): accumulator residue ampere-hour capacity.
Fig. 4 changes synoptic diagram for actual capacity in the accumulator several times use in the algorithm of the present invention, in the actual use of accumulator, through after the discharging and recharging repeatedly; Its capacity diminishes gradually, just, m time complete completely fill with complete discharge process after; The m+1 time C (s) is the C (m) among Fig. 4, and its calculating can be calculated according to the algorithm of setting, in the present invention; Limiting algorithm is to get the nearest average of N capacity in the past, that is:
C(s[m+1])={C(m-n+1)+C(m-n+2)+...+C(m)}/n;
The present invention also comprises the step according to current residual capacity and current velocity of discharge calculating socking out time t (p), that is: T (p)=C (p)/Δ C.
C among the figure (b): accumulator uses ampere-hour capacity first; C (m): accumulator uses the back ampere-hour capacity m time; C (d): ampere-hour capacity during battery malfunction.
The present invention also comprises for monitored accumulator or battery pack, and through the real-time calculating of C (s) being monitored out whether losing efficacy of concrete certain accumulator in this accumulator or this battery pack, concrete grammar is:
Calculate ∏=C (s)/C (0);
If: ∏≤μ 3, and be judged as accumulator and be in failure state,
Wherein: defining the specified capacity of expiring accumulator when filling is variable C (0); The battery malfunction volumetric standards that μ 3 sets for the user.
Accurate capacity algorithm based on same invention; A kind of monitoring system also is provided in the embodiment of the invention; Fig. 5 is the structural representation of monitoring system in the embodiment of the invention, and the monitoring system that the accumulator capacity among the present invention is accurately measured specifically includes but not limited to following functional module:
Data acquisition function module, the data owner of collection will comprise the current information of the time granularity collection of setting by the user;
The data-transformation facility module is through the real-time data that transmission collected of wired or wireless transmission mode;
Data integration Presentation Function module is through outputing to display terminal to monitor current accumulator user mode to the data that collect in real time after analyzing;
Preferably, further comprise:
Monitored accumulator can be single accumulator, also can be a group storage battery;
Data transmission comprises data necessary transmission and Data Receiving function or device;
The data that are transmitted can be the raw data that collects, and also can be through the data after analyzing; Each function in the system can integratedly realize, also can independently realize through hardware device independently.
Fig. 6 is the calculation process synoptic diagram among algorithm of the present invention and the embodiment, and as shown in the figure, its important step comprises:
1. parameter initialization [C (s)/C (p)/Δ t/C (t)/Δ C (t)]
2. gather t electric current I (t) constantly
3. judge battery status (charge/discharge)
4. calculate discharge capacity changes delta C (t)
5. calculate charging capacity changes delta C (t)
6. judge whether fully discharge of battery
7. judge whether fully charging of battery
8. upgrade battery total capacity and change C (t)
9. upgrade discharge back battery capacity C (p) fully
10. upgrade charging back battery capacity C (s) fully
11. calculating and the parameter that shows battery meter [C (s)/C (p)/C (t)] etc.
Those skilled in the art should understand that embodiments of the invention can be provided as method, integrated system or corresponding product.Therefore, the present invention can adopt the form of the embodiment of complete hardware embodiment, complete software implementation example or combination software and hardware aspect.
The present invention is that reference is described according to the process flow diagram and/or the block scheme of method, equipment (system) and the computer program of the embodiment of the invention.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or the block scheme and/or square frame and process flow diagram and/or the block scheme and/or the combination of square frame.Can provide these computer program instructions to the processor of multi-purpose computer, special purpose computer, Embedded Processor or other programmable data processing device to produce a machine, make the instruction of carrying out through the processor of computing machine or other programmable data processing device produce to be used for the device of the function that is implemented in flow process of process flow diagram or a plurality of flow process and/or square frame of block scheme or a plurality of square frame appointments.
Although described the preferred embodiments of the present invention, in a single day those skilled in the art get the basic inventive concept could of cicada, then can make other change and modification to these embodiment.So accompanying claims is intended to be interpreted as all changes and the modification that comprises preferred embodiment and fall into the scope of the invention.
Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, belong within the scope of claim of the present invention and equivalent technologies thereof if of the present invention these are revised with modification, then the present invention also is intended to comprise these changes and modification interior.

Claims (5)

1. an accumulator capacity monitoring method is characterized in that, may further comprise the steps:
1) battery monitor is surveyed parameter initialization:
The capacity of accumulator is variable C (s) when 11) defining this and completely fill;
12) be defined in t constantly the residual capacity of accumulator be variable C (p);
13) definition Δ t is the current acquisition time granularity of accumulator;
2) judge in the charging process whether current accumulator has been fully charged state:
Utilize formula (1) to calculate charging unit interval volume change rate ε
formula (1)
If ε≤μ 1, be judged as accumulator and be in fully charged state;
3) judge in the discharge process whether current accumulator has been discharge fully:
Utilize formula (2) to calculate discharge unit interval volume change rate Φ
formula (2)
If: Φ≤μ 2, and be judged as accumulator and be in complete discharge condition,
Wherein: I (t) is the electric current of accumulator t charge or discharge constantly;
is the ampere-hour capacity of accumulator t charge or discharge constantly;
Volumetric standards, i.e. unit interval granularity inner capacities rate of change when the accumulator that μ 1 sets for the user completely fills; The volumetric standards when accumulator that μ 2 sets for the user discharges fully.
2. accumulator capacity monitoring method according to claim 1 is characterized in that: also comprise the step of calculating accumulator real surplus capacity, in the past [t~tx] in the time, the variable quantity of accumulator capacity is:
Residual capacity through computes tx moment accumulator is:
C(p)=C(s)±ΔC。
3. accumulator capacity monitoring method according to claim 2; It is characterized in that: the step that also comprises actual capacity variable quantity in the use of calculating accumulator several times; M time complete completely fill with complete discharge process after; The m+1 time C (s) is C (m), and computing method are to get the nearest average of n capacity in the past, that is:
C(s[m+1])={C(m-n+1)+C(m-n+2)+...+C(m)}/n。
4. accumulator capacity monitoring method according to claim 2 is characterized in that: also comprise the step according to current residual capacity and current velocity of discharge calculating socking out time t (p), that is:
T(p)=C(p)/ΔC。
5. accumulator capacity monitoring method according to claim 2; It is characterized in that: for monitored accumulator or battery pack; Through the real-time calculating of C (s) being monitored out in this accumulator or this battery pack whether losing efficacy of concrete certain accumulator, concrete grammar is:
Calculate ∏=C (s)/C (0);
If: ∏≤μ 3, and be judged as accumulator and be in failure state,
Wherein: defining the specified capacity of expiring accumulator when filling is variable C (0); The battery malfunction volumetric standards that μ 3 sets for the user.
CN2011103516102A 2011-11-09 2011-11-09 Method for monitoring capacity of storage battery Expired - Fee Related CN102508170B (en)

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CN103576681A (en) * 2012-07-26 2014-02-12 苏州宝时得电动工具有限公司 Automatic traveling device and control method thereof
CN103682508A (en) * 2013-11-26 2014-03-26 北京空间飞行器总体设计部 Method for determining electric charge state of spacecraft Li-ion (Lithium-ion) storage battery
CN104101839A (en) * 2013-04-09 2014-10-15 东莞钜威新能源有限公司 Electric quantity detection system and electric quantity detection method
CN104597404A (en) * 2014-12-19 2015-05-06 深圳市科陆电子科技股份有限公司 Automatic marking method of actual battery capacity, SOC (state of charge) and SOH (state of health)
CN105005002A (en) * 2015-07-01 2015-10-28 清华大学 Prediction method and system of cell residual discharge energy based on future voltage calculation
CN105607011A (en) * 2016-03-23 2016-05-25 北京经纬恒润科技有限公司 Method and device for estimating state of health (SOH) of battery
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CN108196193A (en) * 2017-12-22 2018-06-22 厦门拓宝科技有限公司 A kind of method for safeguarding power matching network system worked well
CN108594124A (en) * 2018-04-03 2018-09-28 广东小天才科技有限公司 A kind of detection method and electronic equipment of battery
CN108693476A (en) * 2018-04-02 2018-10-23 浙江南都电源动力股份有限公司 Predict that residue can discharge time methods, devices and systems in any multiplying power for battery
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US10105838B2 (en) 2012-03-02 2018-10-23 Positec Power Tools (Suzhou) Co., Ltd Automatically travelling device and control method therefor
CN103576681B (en) * 2012-07-26 2017-04-12 苏州宝时得电动工具有限公司 Automatic traveling device and control method thereof
CN103576681A (en) * 2012-07-26 2014-02-12 苏州宝时得电动工具有限公司 Automatic traveling device and control method thereof
CN104101839A (en) * 2013-04-09 2014-10-15 东莞钜威新能源有限公司 Electric quantity detection system and electric quantity detection method
CN103682508B (en) * 2013-11-26 2015-10-21 北京空间飞行器总体设计部 A kind of spacecraft lithium-ions battery group state-of-charge defining method
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CN104597404A (en) * 2014-12-19 2015-05-06 深圳市科陆电子科技股份有限公司 Automatic marking method of actual battery capacity, SOC (state of charge) and SOH (state of health)
CN105005002A (en) * 2015-07-01 2015-10-28 清华大学 Prediction method and system of cell residual discharge energy based on future voltage calculation
CN105005002B (en) * 2015-07-01 2018-02-09 清华大学 The Forecasting Methodology and system of the remaining battery discharge energy calculated based on following voltage
CN105607011A (en) * 2016-03-23 2016-05-25 北京经纬恒润科技有限公司 Method and device for estimating state of health (SOH) of battery
CN107748333A (en) * 2017-10-09 2018-03-02 杭州华塑加达网络科技有限公司 Remaining battery capacity evaluation method and system
CN107748333B (en) * 2017-10-09 2020-07-03 杭州华塑加达网络科技有限公司 Method and system for estimating residual capacity of storage battery
CN108196193A (en) * 2017-12-22 2018-06-22 厦门拓宝科技有限公司 A kind of method for safeguarding power matching network system worked well
CN108693476A (en) * 2018-04-02 2018-10-23 浙江南都电源动力股份有限公司 Predict that residue can discharge time methods, devices and systems in any multiplying power for battery
CN108594124A (en) * 2018-04-03 2018-09-28 广东小天才科技有限公司 A kind of detection method and electronic equipment of battery

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