CN108828461A - Power battery SOH value evaluation method and system - Google Patents

Power battery SOH value evaluation method and system Download PDF

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Publication number
CN108828461A
CN108828461A CN201811119517.7A CN201811119517A CN108828461A CN 108828461 A CN108828461 A CN 108828461A CN 201811119517 A CN201811119517 A CN 201811119517A CN 108828461 A CN108828461 A CN 108828461A
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charging
capacity
value
battery
correction value
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CN108828461B (en
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梁荣荣
秦李伟
李忠
庞艳红
王文科
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Anhui Jianghuai Automobile Group Corp
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Anhui Jianghuai Automobile Group Corp
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Abstract

The invention discloses a kind of power battery SOH value evaluation methods and system, method to include:Step S1, it determines and enters trickle charge mode;Step S2, judge whether SOC value passes through OCV amendment before charging;If so, thening follow the steps S3, obtaining the first electricity correction value, the first electricity correction value is the modified SOC value of OCV;Step S4, it obtains after OCV amendment to the accumulated discharge capacity before charging;Step S5, the first charging capacity is obtained after fully charged;Step S6, according to the first charging capacity, accumulated discharge capacity and the first electricity correction value, battery actual capacity is calculated;Step S7, preset battery initial capacity is obtained;Step S8, according to battery actual capacity and battery initial capacity, battery SOH value is obtained.The present invention can obtain online estimation parameter, process is simple and accuracy is higher without storing a large amount of nominal datas without laboratory estimation is carried out in normal use process.

Description

Power battery SOH value evaluation method and system
Technical field
The present invention relates to new-energy automobile field more particularly to a kind of power battery SOH value evaluation method and systems.
Background technique
As power battery is in use with the continuous decaying of capacity, the difference of battery with two side terminals gradually becomes Greatly, pure electric automobile battery pack SOH value is also constantly decaying.In electric vehicle driving process, it is desirable to be able to battery pack Health status (SOH) is estimated, also remains that how many capacity can be used effectively to evaluate battery pack.If SOH accuracy is not high, It will cause the inaccuracy of the state-of-charge (SOC) of battery, the estimation error of SOC is larger, may cause electric car halfway because of electricity Amount is insufficient and is forced to stop.
Although the SOH value of battery can be obtained by test in laboratory, in battery in actual use without real The various conditions of room are tested, the SOH value of battery can not be directly obtained by measurement method, if extremely by the battery recycling of electric car The measurement of laboratory progress SOH value, it will waste a large amount of manpower financial capacity.It is mainly to the estimation of battery SOH both at home and abroad at present Appraisal procedure based on battery capacity and SOC or the internal resistance of cell, but there is no real, mature to be applied to product.
One of existing method:SOH=(battery cell scraps the practical internal resistance of internal resistance-battery cell)/(battery cell report Useless internal resistance-battery cell factory internal resistance);
Another existing method:SOH=SOC1*Q3+Q2/Q1*100%, wherein Q1 is total appearance when the battery pack is dispatched from the factory Amount;SOC1 is the state-of-charge of minimum monomer voltage single battery, and Q2, which is that minimum monomer voltage battery is accumulative at the end of charging, to be filled The electricity entered, Q3 are to calculate minimum voltage single battery actually available capacity available at this time.
Therefore in the prior art to the assessment of the SOH of battery mainly according to the SOC estimated value of battery management system And the measured value of batteries monomer voltage, monomer internal resistance, therefore, the foundation of assessment has limitation, and this evaluation side Method is very strong to the dependence of the knowledge and experience level of professional technician.
Summary of the invention
The object of the present invention is to provide a kind of power battery SOH value evaluation method and systems, tie in battery charging process The actual use operating conditions such as electric discharge, OCV amendment are closed, more accurate SOH value is obtained.
The technical solution adopted by the present invention is as follows:
A kind of power battery SOH value evaluation method, including:
Step S1, it determines and enters trickle charge mode;
Step S2, judge whether SOC value passes through open-circuit voltage amendment before charging;
If so, thening follow the steps S3, obtaining the first electricity correction value, the first electricity correction value is open-circuit voltage amendment SOC value;
Step S4, it obtains after open-circuit voltage amendment to the accumulated discharge capacity before charging;
Step S5, the first charging capacity is obtained after fully charged, first charging capacity is this charging total capacity;
Step S6, according to the first charging capacity, accumulated discharge capacity and the first electricity correction value, the practical appearance of battery is calculated Amount;
Step S7, preset battery initial capacity is obtained;
Step S8, according to battery actual capacity and battery initial capacity, battery SOH value is obtained.
Optionally, the method also includes:
If step S2 output be it is no, then follow the steps S30, judge whether the current charging time is greater than preset time threshold Value;
If so, thening follow the steps S40, obtaining monomer minimum temperature and monomer minimum voltage;
Step S50, the SOC trickle charge correction chart demarcated in advance is inquired according to monomer minimum temperature and monomer minimum voltage, Obtain corresponding second electricity correction value;
Step S60, current SOC value is modified to the second electricity correction value;
Step S70, the second charging capacity is obtained after fully charged, second charging capacity is from the second electricity correction value It is charged to the charging capacity of full electricity;
Step S80, according to the second charging capacity and the second electricity correction value, battery actual capacity is calculated;
Step S7 and step S8 is successively executed later.
Optionally, the method also includes:
Step S3 ' is executed after step s 3, judges whether the first electricity correction value is less than or equal to preset power threshold;
If so, thening follow the steps S4;If it is not, thening follow the steps S30.
Optionally, further include before step S3:
If step S2 output be it is yes, then follow the steps S2 ', judge open-circuit voltage correct when environment temperature whether be greater than In preset temperature threshold;
If so, thening follow the steps S3;If it is not, thening follow the steps S30.
Optionally, step S1 is specifically included:
Step S11, after starting to charge, charging current is obtained;
Step S12, judge charging current whether in scheduled electric current section;
If so, thening follow the steps 13, determining into trickle charge mode.
A kind of power battery SOH value estimating system, including:
Charge mode identification module enters trickle charge mode for determining;
Open-circuit voltage corrects determination module, for judging whether SOC value passes through open-circuit voltage amendment before charging;
Electricity correction value obtains module, for obtaining the first electricity when open-circuit voltage amendment determination module output is is Correction value, the first electricity correction value are the modified SOC value of open-circuit voltage;
Discharge capacity obtains module, for obtaining after open-circuit voltage amendment to the accumulated discharge capacity before charging;
Charging capacity obtains module, and for after fully charged, obtaining the first charging capacity, first charging capacity is this Secondary charging total capacity;
Actual capacity computing module is used for according to the first charging capacity, accumulated discharge capacity and the first electricity correction value, Calculate battery actual capacity;
Battery initial capacity obtains module, for obtaining preset battery initial capacity;
SOH estimation block, for obtaining battery SOH value according to battery actual capacity and battery initial capacity.
Optionally, the system also includes:
Charging time detection module is used for when open-circuit voltage amendment determination module output is no, when judging currently charging Between whether be greater than preset time threshold;
Monomer data obtaining module, for when detection module output is is between when charging, obtain monomer minimum temperature with And monomer minimum voltage;
Table look-up module, the SOC trickle charge for being demarcated in advance according to monomer minimum temperature and monomer minimum voltage inquiry are repaired Positive table obtains corresponding second electricity correction value;
Trickle charge correction module, for current SOC value to be modified to the second electricity correction value;
Charging capacity obtains module, is also used to obtain the second charging capacity after fully charged, second charging capacity is The charging capacity of full electricity is charged to from the second electricity correction value;
Actual capacity computing module is also used to the second charging capacity and the second electricity correction value, calculates the practical appearance of battery Amount.
Optionally, the electricity correction value obtains module and is also used to judge whether the first electricity correction value is less than or equal to preset Power threshold.
Optionally, whether the open-circuit voltage amendment determination module is also used to judge environment temperature when open-circuit voltage is corrected More than or equal to preset temperature threshold.
Optionally, the charge mode identification module specifically includes:
Charging current acquiring unit obtains charging current after starting to charge;
Charging current detection unit, for judging charging current whether in scheduled electric current section;
Charge mode recognition unit, for determining and entering trickle charge mode when the output of charging current detection unit is is.
The present invention passes through determines revised SOC value during the charging process, and in this, as calculating battery actual capacity Basis, to obtain more accurate SOH estimation parameter, the present invention is real without carrying out without storing calibrated mass data Room estimation is tested, can be in vehicle normal use process, Always Online" obtains estimation parameter, and process is simple and accuracy is higher.
Detailed description of the invention
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing Step description, wherein:
Fig. 1 is the embodiment flow chart of power battery SOH value evaluation method provided by the invention;
Fig. 2 is the flow chart of the specific embodiment of power battery SOH value evaluation method provided by the invention;
Fig. 3 is the block diagram of the embodiment of power battery SOH value estimating system provided by the invention.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached The embodiment of figure description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
The present invention provides a kind of embodiments of power battery SOH value evaluation method, as shown in Figure 1, can specifically include Following steps:
Step S1, it determines and enters trickle charge mode;
Fast charge and trickle charge, the implementation of the invention trickle charge mould more stable for state are divided into the charging of power battery Formula, wherein there are many identification fast charge or the existing way of trickle charge, such as pass through charging current, charge mode switch state, charging mould Formula selection instruction etc..
Step S2, judge whether SOC value passes through open-circuit voltage amendment before charging;
After charging starts it is first determined whether carrying out OCV amendment before, it can usually pass through detection OCV amendment mark Position is differentiated.It may be noted that OCV modification method is routine techniques, the present invention is not repeated.
If so, thening follow the steps S3, obtaining the first electricity correction value;
First electricity correction value described here carries out modified SOC value when OCV amendment before referring to.
Step S4, it obtains after open-circuit voltage amendment to the accumulated discharge capacity before charging;
The accumulated discharge capacity, which can refer to, puts after the amendment of OCV before to primary or multiple before this charging Electric total amount if not discharged after amendment carries out this charging, regards the accumulated discharge capacity certainly as 0.Citing comes It says, SOC is 45% when user drives to reach the underground A electricity, and OCV amendment is carried out after meeting OCV modified condition, and (such as user exists Stop to A more than 1 hour, that is to say that battery standing is more than 1 hour), SOC is corrected for 43%;User powers on to be reached with sailing out of A B, SOC is reduced to 33% during being somebody's turn to do;It from B is sailed again after short stay to C, SOC is reduced to 20% during being somebody's turn to do, same with this When, user in C carries out trickle charge to battery, then according to after the amendment described previously from OCV to discharging two in total before this charging It is secondary.
Step S5, the first charging capacity is obtained after fully charged;
First charging capacity described here is this charging total capacity, i.e., up to being charged to 100% from being started to charge this Total charging capacity is obtained when electricity.It is also pointed out that fully charged is one of calculation basis of the present invention, it is not fully charged Charging process is not within the scope of the present invention.
Step S6, according to the first charging capacity, accumulated discharge capacity and the first electricity correction value, the practical appearance of battery is calculated Amount;
It will be appreciated to those of skill in the art that calculation method can be according to following formula:
Battery actual capacity=(the first charging capacity-accumulated discharge capacity)/(the first electricity of 100%- correction value);It can See, the calculating for battery actual capacity, foothold of the invention is to find an accurate calculating reference point, the present embodiment It is using the modified SOC value of OCV as benchmark.
Step S7, preset battery initial capacity is obtained;
The battery initial capacity is generally provided by battery manufacturer or can also be by whole-car firm by bench test meter It obtains, and is stored in battery management system.
Step S8, according to battery actual capacity and battery initial capacity, battery SOH value is obtained.
It will be appreciated to those of skill in the art that evaluation method can be according to following formula:
SOH=battery actual capacity/battery initial capacity.
Above-described embodiment need to be illustrated, the order of above-mentioned part steps can be adjusted, and abovementioned steps label S is not It refers to successively, such as step S7 obtains preset battery initial capacity and can occur during the charging process, or even entirely obtains phase It closes parameter and calculating process occurs after fully charged.
The present invention passes through determines revised SOC value during the charging process, and in this, as calculating battery actual capacity Basis, to obtain more accurate SOH estimation parameter, the present invention is real without carrying out without storing calibrated mass data Test room estimation, can be in vehicle normal use process, Always Online" obtains estimation parameter, process is simple, independence and accuracy compared with It is high.
Based on the above embodiment, the present invention also provides a kind of more specifically embodiments, wherein to correlation step into It has gone exemplary expansion, but need to illustrate that each expansion can both be administered alone and summarize in other embodiments or as shown in Figure 2 At a scheme.It can specifically include following steps:
Step S11, after starting to charge, charging current is obtained;
Step S12, judge charging current whether in scheduled electric current section;
If so, thening follow the steps 13, determining into trickle charge mode;
Above-mentioned three step is to know to determine charge mode otherwise using electric current, and specific electric current section can adjust, such as 14A is between 20A etc..
Step S2, judge whether SOC value passes through open-circuit voltage amendment before charging;
If step S2 output be it is yes, then follow the steps S2 ', judge open-circuit voltage correct when environment temperature whether be greater than In preset temperature threshold;
Environment temperature precision modified for OCV can have an impact, therefore be preferably provided with amendment temperature threshold, after guaranteeing The continuous calculating parameter got and result are more accurate, such as 10 DEG C.
If so, thening follow the steps S3;If it is not, thening follow the steps S30;
Step S3, the first electricity correction value is obtained;
Step S3 ', judge whether the first electricity correction value is less than or equal to preset power threshold;
Similarly, calculation mentioned earlier gets over mistake generation as the first electricity correction value for calculating basis Error is smaller, therefore in order to guarantee that the subsequent calculating parameter got and result are more accurate, can exclude the biggish electricity of error Magnitude, such as power threshold is set as 50%.
If so, thening follow the steps S4;If it is not, thening follow the steps S30;
Step S4, it obtains after open-circuit voltage amendment to the accumulated discharge capacity before charging;
Step S5, the first charging capacity is obtained after fully charged;
Step S6, according to the first charging capacity, accumulated discharge capacity and the first electricity correction value, the practical appearance of battery is calculated Amount;
Step S7, preset battery initial capacity is obtained;
Step S8, according to battery actual capacity and battery initial capacity, battery SOH value is obtained.
If above-mentioned steps S2, step S2 ' and step S3 ' output be it is no, can execute step S30, judgement currently Whether the charging time is greater than preset time threshold;
If so, thening follow the steps S40, obtaining monomer minimum temperature and monomer minimum voltage;
Step S50, the SOC trickle charge correction chart demarcated in advance is inquired according to monomer minimum temperature and monomer minimum voltage, Obtain corresponding second electricity correction value;
Step S60, current SOC value is modified to the second electricity correction value;
Above-mentioned steps S30~step S40 refers to did not carried out OCV amendment or OCV correction conditions not before this charging Meet above-mentioned required precision, then trickle charge amendment can be carried out to SOC using in charging process.Detailed process is as above-mentioned, first really Charged certain time, such as 30 minutes are protected, stable monomer information can be obtained under the operating condition that charges with this basis, then by Monomer information, which is tabled look-up, obtains the corresponding SOC value of trickle charge amendment, which is demarcated as routine techniques, and the present invention is not It repeats.
Step S70, the second charging capacity is obtained after fully charged;
Second charging capacity is that the charging capacity of full electricity is charged to from the second electricity correction value;
Step S80, according to the second charging capacity and the second electricity correction value, battery actual capacity is calculated;
The same above description of the principle of the process, foothold of the invention be to find an accurate calculating reference point, this If be unsatisfactory in embodiment related OCV it is modified under the conditions of, using the revised SOC of trickle charge as benchmark obtain relevant parameter.? Abovementioned steps S7 and abovementioned steps S8 is successively executed after step S80, process is identical as preceding description, and which is not described herein again.
Corresponding to above-mentioned evaluation method, the present invention also provides a kind of power battery SOH value estimating systems, as shown in figure 3, Including:
For determining the charge mode identification module for entering trickle charge mode;
For judging whether SOC value passes through the modified open-circuit voltage amendment determination module of open-circuit voltage before charging;
For when open-circuit voltage amendment determination module output is is, the electricity correction value for obtaining the first electricity correction value to be obtained Modulus block, the first electricity correction value are the modified SOC value of open-circuit voltage;
Module is obtained for obtaining the discharge capacity after open-circuit voltage amendment to the accumulated discharge capacity before charging;
Charging capacity for after fully charged, obtaining the first charging capacity obtains module, and first charging capacity is This charging total capacity;
For calculating battery actual capacity according to the first charging capacity, accumulated discharge capacity and the first electricity correction value Actual capacity computing module;
Battery initial capacity for obtaining preset battery initial capacity obtains module;And
For obtaining the SOH estimation block of battery SOH value according to battery actual capacity and battery initial capacity.
In another system embodiment, the system can also include:
For when open-circuit voltage amendment determination module output be it is no when, when judging whether the current charging time is greater than preset Between threshold value charging time detection module,;
For obtaining the list of monomer minimum temperature and monomer minimum voltage when detection module output is is between when charging Body data obtaining module;
For inquiring the SOC trickle charge correction chart demarcated in advance according to monomer minimum temperature and monomer minimum voltage, obtain The table look-up module of corresponding second electricity correction value;
For current SOC value to be modified to the trickle charge correction module of the second electricity correction value;
And aforementioned charging capacity obtains module and can be also used for obtaining the second charging capacity after fully charged, and described second Charging capacity is that the charging capacity of full electricity is charged to from the second electricity correction value;Actual capacity computing module can be also used for second and fill Capacitance and the second electricity correction value calculate battery actual capacity.
In other embodiments, the electricity correction value obtains module can be also used for whether judging the first electricity correction value Less than or equal to preset power threshold;The open-circuit voltage amendment determination module can be also used for judging when open-circuit voltage is corrected Whether environment temperature is more than or equal to preset temperature threshold.
Further, it is also possible to which it is further contemplated that aforementioned charge mode identification module can be made of such as lower unit:For opening Begin to obtain the charging current acquiring unit of charging current after charging;For judging charging current whether in scheduled electric current section Interior charging current detection unit;For determining the charging for entering trickle charge mode when the output of charging current detection unit is is Pattern recognition unit.
In conclusion the present invention passes through determines revised SOC value during the charging process, and real in this, as battery is calculated The basis of border capacity, to obtain more accurate SOH estimation parameter, the present invention without store calibrated mass data also without Laboratory estimation need to be carried out, can be in vehicle normal use process, Always Online" obtains estimation parameter, and process is simple and accuracy It is higher.
Finally it need to be pointed out that system embodiment of the invention can be realized with existing hardware entities, or at one Perhaps the software module run on multiple processors is realized or is realized with the combination of software and hardware.It can also be institute in embodiment It states module or unit is combined into a module or unit, further, it is also possible to multiple submodule or subelement are divided into, to this The present invention is not construed as limiting.
It is described in detail structure, feature and effect of the invention based on the embodiments shown in the drawings, but more than Described is only presently preferred embodiments of the present invention, needs to explain, and technology involved in above-described embodiment and its preferred embodiment is special Sign, those skilled in the art can be under the premise of not departing from, not changing mentality of designing and technical effect of the invention, rationally Ground combination collocation is at a variety of equivalent schemes;Therefore, the present invention does not limit the scope of implementation as shown in the drawings, all according to of the invention Change or equivalent example modified to equivalent change, do not go beyond the spirit of the description and the drawings made by conception When, it should all be within the scope of the present invention.

Claims (10)

1. a kind of power battery SOH value evaluation method, which is characterized in that including:
Step S1, it determines and enters trickle charge mode;
Step S2, judge whether SOC value passes through open-circuit voltage amendment before charging;
If so, thening follow the steps S3, obtaining the first electricity correction value, the first electricity correction value is that open-circuit voltage is modified SOC value;
Step S4, it obtains after open-circuit voltage amendment to the accumulated discharge capacity before charging;
Step S5, the first charging capacity is obtained after fully charged, first charging capacity is this charging total capacity;
Step S6, according to the first charging capacity, accumulated discharge capacity and the first electricity correction value, battery actual capacity is calculated;
Step S7, preset battery initial capacity is obtained;
Step S8, according to battery actual capacity and battery initial capacity, battery SOH value is obtained.
2. power battery SOH value evaluation method according to claim 1, which is characterized in that the method also includes:
If step S2 output be it is no, then follow the steps S30, judge whether the current charging time is greater than preset time threshold;
If so, thening follow the steps S40, obtaining monomer minimum temperature and monomer minimum voltage;
Step S50, the SOC trickle charge correction chart demarcated in advance is inquired according to monomer minimum temperature and monomer minimum voltage, obtained Corresponding second electricity correction value;
Step S60, current SOC value is modified to the second electricity correction value;
Step S70, the second charging capacity is obtained after fully charged, second charging capacity is to be charged to from the second electricity correction value The charging capacity of full electricity;
Step S80, according to the second charging capacity and the second electricity correction value, battery actual capacity is calculated;
Step S7 and step S8 is successively executed later.
3. power battery SOH value evaluation method according to claim 2, which is characterized in that the method also includes:
Step S3 ' is executed after step s 3, judges whether the first electricity correction value is less than or equal to preset power threshold;
If so, thening follow the steps S4;If it is not, thening follow the steps S30.
4. power battery SOH value evaluation method according to claim 2, which is characterized in that further include before step S3:
If step S2 output be it is yes, then follow the steps S2 ', judge open-circuit voltage correct when environment temperature whether be more than or equal to it is pre- If temperature threshold;
If so, thening follow the steps S3;If it is not, thening follow the steps S30.
5. power battery SOH value evaluation method according to any one of claims 1 to 4, which is characterized in that step S1 is specific Including:
Step S11, after starting to charge, charging current is obtained;
Step S12, judge charging current whether in scheduled electric current section;
If so, thening follow the steps 13, determining into trickle charge mode.
6. a kind of power battery SOH value estimating system, which is characterized in that including:
Charge mode identification module enters trickle charge mode for determining;
Open-circuit voltage corrects determination module, for judging whether SOC value passes through open-circuit voltage amendment before charging;
Electricity correction value obtains module, for obtaining the amendment of the first electricity when open-circuit voltage amendment determination module output is is Value, the first electricity correction value are the modified SOC value of open-circuit voltage;
Discharge capacity obtains module, for obtaining after open-circuit voltage amendment to the accumulated discharge capacity before charging;
Charging capacity obtains module, and for obtaining the first charging capacity after fully charged, first charging capacity is filled for this Electric total capacity;
Actual capacity computing module, for calculating according to the first charging capacity, accumulated discharge capacity and the first electricity correction value Battery actual capacity;
Battery initial capacity obtains module, for obtaining preset battery initial capacity;
SOH estimation block, for obtaining battery SOH value according to battery actual capacity and battery initial capacity.
7. power battery SOH value estimating system according to claim 6, which is characterized in that the system also includes:
Charging time detection module, for judging that the current charging time is when open-circuit voltage amendment determination module output is no It is no to be greater than preset time threshold;
Monomer data obtaining module, for obtaining monomer minimum temperature and list when detection module output is is between when charging Body minimum voltage;
Table look-up module, for inquiring the SOC trickle charge correction chart demarcated in advance according to monomer minimum temperature and monomer minimum voltage, Obtain corresponding second electricity correction value;
Trickle charge correction module, for current SOC value to be modified to the second electricity correction value;
Charging capacity obtains module, is also used to obtain after fully charged second charging capacity, and second charging capacity is from the Two electricity correction values are charged to the charging capacity of full electricity;
Actual capacity computing module is also used to the second charging capacity and the second electricity correction value, calculates battery actual capacity.
8. power battery SOH value estimating system according to claim 7, which is characterized in that the electricity correction value obtains Module is also used to judge whether the first electricity correction value is less than or equal to preset power threshold.
9. power battery SOH value estimating system according to claim 7, which is characterized in that the open-circuit voltage amendment is sentenced Cover half block is also used to judge whether environment temperature when open-circuit voltage amendment is more than or equal to preset temperature threshold.
10. according to the described in any item power battery SOH value estimating systems of claim 6~9, which is characterized in that the charging Pattern recognition module specifically includes:
Charging current acquiring unit obtains charging current after starting to charge;
Charging current detection unit, for judging charging current whether in scheduled electric current section;
Charge mode recognition unit, for determining and entering trickle charge mode when the output of charging current detection unit is is.
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Cited By (8)

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CN109507611A (en) * 2018-11-22 2019-03-22 安徽江淮汽车集团股份有限公司 A kind of the SOH modification method and system of electric car
CN109856548A (en) * 2018-12-19 2019-06-07 安徽江淮汽车集团股份有限公司 Power battery capacity estimation method
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
CN110376536A (en) * 2019-08-05 2019-10-25 桑顿新能源科技(长沙)有限公司 Battery system SOH detection method, device, computer equipment and storage medium
CN110579718A (en) * 2019-09-03 2019-12-17 北京海博思创科技有限公司 method and device for acquiring SOH (state of health) of battery and battery pack
CN110850313A (en) * 2019-11-14 2020-02-28 宁波德晶元科技有限公司 Lithium battery charging and discharging electric quantity display method and system
CN110861533A (en) * 2019-11-25 2020-03-06 安徽江淮汽车集团股份有限公司 Electric vehicle SOH estimation method and device and storage medium
CN110861533B (en) * 2019-11-25 2021-08-27 安徽江淮汽车集团股份有限公司 Electric vehicle SOH estimation method and device and storage medium

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