CN104597404B - The automatic calibration method of battery actual capacity, SOC and SOH - Google Patents

The automatic calibration method of battery actual capacity, SOC and SOH Download PDF

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CN104597404B
CN104597404B CN201410805918.3A CN201410805918A CN104597404B CN 104597404 B CN104597404 B CN 104597404B CN 201410805918 A CN201410805918 A CN 201410805918A CN 104597404 B CN104597404 B CN 104597404B
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hour
ampere
battery
accumulative
time
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CN104597404A (en
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陈迪虎
陈凯鑫
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Shenzhen Clou Electronics Co Ltd
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Shenzhen Clou Electronics Co Ltd
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Abstract

The invention discloses a kind of automatic calibration method of battery actual capacity, comprise the following steps:Record accumulated discharge ampere-hour number, accumulative charging ampere-hour number and the accumulative ampere-hour electricity in cell operations;Initial time and the finish time of battery discharge procedure are determined according to accumulative ampere-hour electricity;The actual capacity of battery is calculated according to initial time, the accumulated discharge ampere-hour number of finish time and accumulative charging ampere-hour number, actual capacity=| A12-A11 |-| A22-A21 |, wherein, A12 is the accumulated discharge ampere-hour number of finish time, A11 is the accumulated discharge ampere-hour number of initial time, A22 is the accumulative charging ampere-hour number of finish time, and A21 is the accumulative charging ampere-hour number of initial time.The automatic calibration method of above-mentioned battery actual capacity, there is preferable real-time and versatility, suitable for various batteries.Also disclose a kind of automatic calibration method of battery SOC and a kind of battery SOH automatic calibration method.

Description

The automatic calibration method of battery actual capacity, SOC and SOH
Technical field
The present invention relates to technical field of battery management, more particularly to a kind of battery actual capacity, SOC and SOH from Dynamic scaling method.
Background technology
As energy supply device, its performance quality is that user needs the accurate information for understanding and grasping to battery.New battery dispatches from the factory It is nominal capacity that Shi Douhui, which marks a capability value,.The actual capacity of nominal capacity and battery simultaneously differs.Some producers in order to The security used can by nominal capacity mark ratio battery actual capacity it is small, but also some producers for number one and The ratio actual capacity that nominal capacity is marked is high.And aging, the actual capacity of battery can occur in use for battery Can be less and less.In traditional battery management, the estimation to battery actual capacity is mostly to be directed to a kind of and single battery, and it is logical It is poor with property, and real-time can not be realized.In actual application, health status (the State of of battery Health, SOH) and state-of-charge (State of Charge, SOC) be to evaluate the more important two indices of battery quality. Wherein, the nominal capacity of actual capacity/battery of SOH=batteries;The actual capacity of residual capacity/battery of SOC=batteries.
The content of the invention
Based on this, it is necessary in view of the above-mentioned problems, provide a kind of versatility it is good and with real-time battery actual capacity Automatic calibration method.
A kind of automatic calibration method of battery SOC is also provided.
A kind of battery SOH automatic calibration method is also provided.
A kind of automatic calibration method of battery actual capacity, comprises the following steps:Record accumulative in cell operations Ampere-hour of discharging number, accumulative charging ampere-hour number and accumulative ampere-hour electricity;Determine that the battery is put according to the accumulative ampere-hour electricity The initial time of electric process and finish time;At the time of the initial time is that battery has largest cumulative ampere-hour electricity;Institute At the time of state finish time has minimum accumulative ampere-hour electricity for battery;Pacified according to the accumulated discharge of initial time, finish time When number and accumulative charging ampere-hour number calculate the actual capacity of the battery,
Actual capacity=| A12-A11 |-| A22-A21 |
Wherein, A12 be finish time accumulated discharge ampere-hour number, A11 be initial time accumulated discharge ampere-hour number, A22 For the accumulative charging ampere-hour number of finish time, A21 is the accumulative charging ampere-hour number of initial time.
In one of the embodiments, the accumulated discharge ampere-hour number in the record cell operations, accumulative charging peace When number and the step of accumulative ampere-hour electricity after also include step:The accumulative peace of battery is drawn according to the accumulative ampere-hour electricity When electric quantity curve.
In one of the embodiments, the battery is single battery or battery pack.
A kind of automatic calibration method of battery SOC, comprises the following steps:Record the accumulated discharge peace in cell operations When number, accumulative charging ampere-hour number and accumulative ampere-hour electricity;The battery discharge procedure is determined according to the accumulative ampere-hour electricity Initial time and finish time;At the time of the initial time is that battery has largest cumulative ampere-hour electricity;The end At the time of moment is that battery has minimum accumulative ampere-hour electricity;According to the accumulated discharge ampere-hour number of initial time, finish time with And the actual capacity of accumulative charging ampere-hour number calculating battery, actual capacity=| A12-A11 |-| A22-A21 |, wherein, A12 For the accumulated discharge ampere-hour number of finish time, A11 is the accumulated discharge ampere-hour number of initial time, and A22 is the accumulative of finish time Charge ampere-hour number, and A21 is the accumulative charging ampere-hour number of initial time;According to the accumulated discharge ampere-hour number of the battery at current time with And accumulative charging ampere-hour number calculates the SOC value of battery,
SOC=[actual capacity-(| A13-A11 |-| A23-A21 |)]/actual capacity
Wherein, A13 is the accumulated discharge ampere-hour number at current time, and A23 is the accumulative charging ampere-hour number at current time.
In one of the embodiments, the accumulated discharge ampere-hour number in the record cell operations, accumulative charging peace When number and the step of accumulative ampere-hour electricity after also include step:The accumulative peace of battery is drawn according to the accumulative ampere-hour electricity When electric quantity curve.
In one of the embodiments, the battery is single battery or battery pack.
A kind of battery SOH automatic calibration method, comprises the following steps:Record the accumulated discharge peace in cell operations When number, accumulative charging ampere-hour number and accumulative ampere-hour electricity;The battery discharge procedure is determined according to the accumulative ampere-hour electricity Initial time and finish time;At the time of the initial time is that battery has largest cumulative ampere-hour electricity;The end At the time of moment is that battery has minimum accumulative ampere-hour electricity;According to the accumulated discharge ampere-hour number of initial time, finish time with And the actual capacity of the accumulative charging ampere-hour number calculating battery, actual capacity=| A12-A11 |-| A22-A21 |, wherein, A12 is the accumulated discharge ampere-hour number of finish time, and A11 is the accumulated discharge ampere-hour number of initial time, and A22 is the tired of finish time Meter charging ampere-hour number, A21 are the accumulative charging ampere-hour number of initial time;Calculate the SOH value of battery, the reality of the SOH=batteries The nominal capacity of border capacity/battery.
In one of the embodiments, the accumulated discharge ampere-hour number in the record cell operations, accumulative charging peace When number and the step of accumulative ampere-hour electricity after also include step:The accumulative peace of battery is drawn according to the accumulative ampere-hour electricity When electric quantity curve.
In one of the embodiments, the battery is single battery or battery pack.
In one of the embodiments, step is also included after the step of SOH value of the calculating battery:Described in judgement Whether SOH value is less than preset value, if it is sends alarm and exports the SOH value.
The automatic calibration method of above-mentioned battery actual capacity, SOC and SOH, by accumulative in working in real time battery Electric discharge ampere-hour number and accumulative charging ampere-hour number are recorded the automatic Calibration that can be achieved to battery actual capacity, are had preferable Real-time and versatility, suitable for various batteries.Meanwhile accumulated discharge ampere-hour number and accumulative charging ampere-hour number are recorded During, it can't be limited by specific environment, the applicability of environment is preferable, and antijamming capability is stronger.
Brief description of the drawings
Fig. 1 is the flow chart of the automatic calibration method of the battery actual capacity in an embodiment;
Fig. 2 is the accumulative ampere-hour electricity formed in the automatic calibration method of the battery actual capacity in embodiment illustrated in fig. 1 Curve map;
Fig. 3 is the flow chart of the automatic calibration method of the battery SOC in an embodiment;
Fig. 4 is the flow chart of the automatic calibration method of the battery SOH in an embodiment.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and It is not used in the restriction present invention.
A kind of automatic calibration method of battery actual capacity, it can carry out automatic to the actual capacity including lithium battery etc. Demarcation.Fig. 1 show the flow chart of the automatic calibration method of the battery actual capacity in an embodiment, comprises the following steps.
S110, record accumulated discharge ampere-hour number, accumulative charging ampere-hour number and accumulative ampere-hour electricity in cell operations Amount.
It may also be discharged because battery may charge in practical work process, thus it is tired to it to cell operations Meter electric discharge ampere-hour number and accumulative charging ampere-hour number are recorded.In the present embodiment, it is worked to record battery in real time for system Accumulated discharge ampere-hour number and accumulative charging ampere-hour number in journey.In other examples, system can also periodic logging battery Accumulated discharge ampere-hour number and accumulative charging ampere-hour number in the course of work.In the present embodiment, can also be according to the tired of record battery Meter ampere-hour electricity forms accumulative ampere-hour electric quantity curve figure, as shown in Figure 2.
S120, determine initial time and the finish time of battery discharge procedure.
The initial time of battery discharge procedure is determined according to the accumulative ampere-hour electricity of battery.In the present embodiment, battery is put Electricity initial time refer to battery be charged to can not charging at the time of, i.e., at the time of battery has largest cumulative ampere-hour electricity. And the finish time of battery discharge then refers to battery discharge at the time of can not discharging again, i.e., now battery has minimum accumulative peace When electricity.In the present embodiment, battery discharge mistake can intuitively be confirmed very much from the accumulative ampere-hour electric quantity curve in Fig. 2 The initial time A and finish time B of journey.
S130, battery is calculated according to initial time, the accumulated discharge ampere-hour number of finish time and accumulative charging ampere-hour number Actual capacity.
Go to obtain the accumulated discharge ampere-hour number at corresponding moment according to the initial time of determination and finish time and add up to fill Electric ampere-hour number.In the present embodiment, the accumulated discharge ampere-hour number of initial time is A11, the accumulated discharge ampere-hour number of finish time For A12, the accumulative charging ampere-hour number of initial time is A21, and the accumulative charging ampere-hour number of finish time is A22.According to getting Correlation value calculation battery actual capacity.The calculation formula of the actual capacity of battery is:
Actual capacity=| A12-A11 |-| A22-A21 |
After actual capacity is calculated, the automatic Calibration to the actual capacity of battery can have both been realized.
The automatic calibration method of above-mentioned battery actual capacity, by real time to battery work in accumulated discharge ampere-hour number and Accumulative charging ampere-hour number is recorded the automatic Calibration that can be achieved to battery actual capacity, has preferable real-time and general Property, suitable for various batteries.Meanwhile during being recorded to accumulated discharge ampere-hour number and accumulative charging ampere-hour number, not It can be limited by specific environment, the applicability of environment is preferable, and antijamming capability is stronger.
In the present embodiment, battery can be single battery, can be whole heap, whole cluster, the battery pack of whole bag, it can be with Suitable for various battery systems, without manual intervention.The automatic calibration method of the actual capacity of above-mentioned battery can be used in vehicle-mounted System, it can be used for large-scale energy-storage system.And calibration process is with regard to carrying out in real time in the course of work of battery, it is not necessary to It is specific to send instruction, or the environment that manufacture is special, so greatly save time, man power and material.
In the present embodiment, the reality obtained can be also calculated according to different times after the actual capacity value for obtaining battery is calculated Border capacity draws calibration curve, so as to which intuitively the actual capacity situation of change of battery is monitored and managed.Work as battery Actual capacity when showing that the state of battery is more bad, system can actively apply for manual maintenance, and guarantee battery system is with one kind The state of health puts into operation.
Fig. 3 is the automatic calibration method of the battery SOC in an embodiment, and it includes step S310~S340.Due to this hair The personal calibration process of bright middle battery SOC is carried out on the basis of the automatic calibration method of the actual capacity based on battery, because This, step S310~S340 is the automatic Calibration process of the actual capacity of battery, is not repeated herein.
S340, battery is calculated according to the accumulated discharge ampere-hour number of the battery at current time and accumulative charging ampere-hour number SOC value.
SOC value is the index parameter for the residual capacity for characterizing battery, it is therefore desirable to obtains the accumulative of the battery at current time Discharge ampere-hour number and accumulative charging ampere-hour number.In the present embodiment, the accumulated discharge ampere-hour number got is A13, accumulative to fill Electric ampere-hour number is A23.After the accumulated discharge ampere-hour number of battery at current time and accumulative charging ampere-hour number is obtained, electricity is calculated The SOC value in pond.
In this embodiment, the formula for calculating the SOC value of battery is:
SOC=[actual capacity-(| A13-A11 |-| A23-A21 |)]/actual capacity
Wherein, (| A13-A11 |-| A23-A21 |) it is net electric discharge ampere-hour of the battery from initial time to current time Number.
The automatic calibration method of above-mentioned battery SOC, the current time accumulative charging ampere-hour number and accumulated discharge ampere-hour of battery Number can be directly obtained, and precision is higher.By first being demarcated to the actual capacity of battery, then calculate current net Ampere-hour number discharge so as to finally obtain the residual capacity of battery so that calibrate the battery remaining power come have it is higher accurate Degree.Traditional battery capacity demarcation is in accordance with SOC and open-circuit voltage OCV (Open Circuit Voltage) into one-to-one corresponding Relation, so as to utilize the SOC value of battery open circuit voltage estimation battery.This method is not particularly suited for each battery, and due to The OCV curves of battery are relatively flat so that the estimation of SOC value is inaccurate.In addition, the general principle of open circuit voltage method is by battery Sufficient standing, battery terminal voltage is set to recover to open-circuit voltage, time of repose is not suitable for real-time online prison typically more than 1 hour Survey.And the present invention can be good at overcoming these problems, the accurate automatic real-time calibration of SOC value is realized.
Fig. 4 is the automatic calibration method of the battery SOH in an embodiment, including step S410~S440.
Because battery SOH automatic calibration method is carried out on the basis of the automatic calibration method based on battery real time capacity , step S410~S430 is the automatic Calibration process of battery real time capacity, is not repeated herein.
S440, calculate the SOH value of battery.
The SOH formula for calculating battery is:The nominal capacity of actual capacity/battery of SOH=batteries.
By the demarcation of the actual capacity to battery so as to realizing the automatic Calibration to battery SOH parameters, be easy to user and When the health status of electrolytic cell, find battery failures and problem in time.
In the present embodiment, when battery SOH value is less than preset value, can also send automatically alarm and by SOH value export to User, remind the user that the current health status of battery is poor, battery is safeguarded or changed in time.In the present embodiment In, default settings 70%.I.e. when SOH value is less than 70%, that is, assert that the life-span of the battery has completed, judge it automatically It has been damaged that, remind the user that and carry out battery altering or maintenance, to ensure that battery puts into fortune with a kind of most healthy state OK.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the guarantor of the present invention Protect scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.

Claims (3)

1. a kind of automatic calibration method of battery actual capacity, comprises the following steps:
Record accumulated discharge ampere-hour number, accumulative charging ampere-hour number and the accumulative ampere-hour electricity in cell operations;
The accumulative ampere-hour electric quantity curve of battery is drawn according to the accumulative ampere-hour electricity;
Initial time and the finish time of the battery discharge procedure are determined according to the accumulative ampere-hour electricity;During the starting Carve at the time of there is largest cumulative ampere-hour electricity for battery;The finish time be battery have minimum accumulative ampere-hour electricity when Carve;
The reality of the battery is calculated according to initial time, the accumulated discharge ampere-hour number of finish time and accumulative charging ampere-hour number Capacity,
Actual capacity=| A12-A11 |-| A22-A21 |
Wherein, A12 is the accumulated discharge ampere-hour number of finish time, and A11 is the accumulated discharge ampere-hour number of initial time, and A22 is knot The accumulative charging ampere-hour number at beam moment, A21 are the accumulative charging ampere-hour number of initial time;The battery is single battery or electricity Pond group.
2. a kind of automatic calibration method of battery SOC, comprises the following steps:
Record accumulated discharge ampere-hour number, accumulative charging ampere-hour number and the accumulative ampere-hour electricity in cell operations;
The accumulative ampere-hour electric quantity curve of battery is drawn according to the accumulative ampere-hour electricity;
Initial time and the finish time of the battery discharge procedure are determined according to the accumulative ampere-hour electricity;During the starting Carve at the time of there is largest cumulative ampere-hour electricity for battery;The finish time be battery have minimum accumulative ampere-hour electricity when Carve;
The actual appearance of battery is calculated according to initial time, the accumulated discharge ampere-hour number of finish time and accumulative charging ampere-hour number Amount, actual capacity=| A12-A11 |-| A22-A21 |, wherein, A12 is the accumulated discharge ampere-hour number of finish time, and A11 is The accumulated discharge ampere-hour number of initial time, A22 are the accumulative charging ampere-hour number of finish time, and A21 is that the accumulative of initial time is filled Electric ampere-hour number;
The SOC value of battery is calculated according to the accumulated discharge ampere-hour number of the battery at current time and accumulative charging ampere-hour number,
SOC=[actual capacity-(| A13-A11 |-| A23-A21 |)]/actual capacity
Wherein, A13 is the accumulated discharge ampere-hour number at current time, and A23 is the accumulative charging ampere-hour number at current time;The battery For single battery or battery pack.
3. a kind of battery SOH automatic calibration method, comprises the following steps:
Record accumulated discharge ampere-hour number, accumulative charging ampere-hour number and the accumulative ampere-hour electricity in cell operations;
The accumulative ampere-hour electric quantity curve of battery is drawn according to the accumulative ampere-hour electricity;
Initial time and the finish time of the battery discharge procedure are determined according to the accumulative ampere-hour electricity;During the starting Carve at the time of there is largest cumulative ampere-hour electricity for battery;The finish time be battery have minimum accumulative ampere-hour electricity when Carve;
The reality of the battery is calculated according to initial time, the accumulated discharge ampere-hour number of finish time and accumulative charging ampere-hour number Capacity, actual capacity=| A12-A11 |-| A22-A21 |, wherein, A12 be finish time accumulated discharge ampere-hour number, A11 For the accumulated discharge ampere-hour number of initial time, A22 is the accumulative charging ampere-hour number of finish time, and A21 is the accumulative of initial time Charge ampere-hour number;The battery is single battery or battery pack;
Calculate the SOH value of battery, the nominal capacity of actual capacity/battery of the SOH=batteries;
Judge whether the SOH value is less than preset value, if it is send alarm and export the SOH value.
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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
CN108572320B (en) * 2017-03-09 2020-02-14 郑州宇通客车股份有限公司 Method and device for estimating effective capacity and health state of minimum single battery and system
CN110927605B (en) 2017-04-18 2021-02-23 华为技术有限公司 Method and device for estimating state of health of 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
CN108638890B (en) * 2018-05-16 2020-03-31 蔚来汽车有限公司 Server, maintenance terminal, power battery maintenance method, device and system
CN110361664A (en) * 2019-08-23 2019-10-22 清华四川能源互联网研究院 Battery detection method, battery monitoring device and charging equipment
CN110568375A (en) * 2019-09-03 2019-12-13 昆山宝创新能源科技有限公司 SOH (state of health) determination method and device for power battery

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KR100333771B1 (en) * 1998-06-15 2002-08-27 삼성전자 주식회사 A method of calibrating rechargeable battery capacity
CN101706556A (en) * 2009-11-11 2010-05-12 惠州市亿能电子有限公司 Actual capacity estimation method of lithium ion battery for pure electric automobile
CN102230953B (en) * 2011-06-20 2013-10-30 江南大学 Method for predicting left capacity and health status of storage battery
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