WO2018112880A1 - Method for evaluating storage battery health state and system thereof - Google Patents

Abstract

A method for evaluating storage battery health state and a system thereof, the method comprising the following steps: collecting and calculating a specific value of health parameters of a storage battery pack or a unit within a storage battery pack (S11); the type of the health parameters comprises at least one from among temperature, internal resistance, float charge voltage, discharge frequency, duration of use, duration of undischarge, and charge ratio; according to the specific value of the health parameters, obtaining a first weight which corresponds thereto (S12); calculating a health score which corresponds to the specific value of the health parameters according to the specific value of the health parameters and the first weight (S13); according to the type of the health parameters, obtain a second weight which corresponds thereto (S14); calculating a partial health score which corresponds to the specific value of the health parameters according to the health score and the second weight (S15); adding all partial health scores to obtain a total health score of the storage battery pack or the unit within the storage battery pack (S16). The present method may evaluate a single storage battery pack or a unit within a storage battery pack, and intuitively reflect the battery health state of a storage battery pack within a region.

Description

Battery health state evaluation method and system thereof Technical field

The present invention relates to the field of battery technologies, and in particular, to a battery health evaluation method and system thereof.

Background technique

As a backup power source, the battery plays an important role in the power supply system of the equipment room. Since the battery in the equipment room is in a floating state for a long time, its performance gradually deteriorates with use. The battery in the equipment room is used in series. The serious damage of one of the single cells will accelerate the aging of other single cells, which will degrade the performance of the whole group. Therefore, it is crucial to detect the health status of the cells and the entire battery in time. Since there are many battery packs in the operator's equipment room, and some battery packs contain more than 100 cells, it is difficult for the operation and maintenance personnel to determine which battery packs need to be discharged and maintained, and which battery cells need to be replaced, thus bringing battery maintenance. Very difficult.

Summary of the invention

The main object of the present invention is to provide a method for evaluating the health status of a battery, which is intended to evaluate the health status of a single battery or a group of cells, or all battery groups in the area, to directly reflect the health of the battery in the area. status.

In order to achieve the above object, the present invention provides a method for evaluating a health state of a battery, characterized in that the method comprises the steps of:

Collecting and calculating a specific value of the health parameter of the battery in the battery pack or the battery pack; the type of the health parameter includes at least one of temperature, internal resistance, float voltage, number of discharges, duration of use, length of undischarged, and charging rate item;

Obtaining a corresponding first weight according to the specific value of the health parameter;

Calculating a health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight;

Obtaining a corresponding second weight according to the type of the health parameter;

Calculating a local health score corresponding to the specific value of the health parameter according to the health score and the second weight;

All of the local health scores are summed to obtain a health total score for the cells within the battery pack or battery pack.

Optionally, the specific value of the temperature is a real-time monitoring value of the battery; the specific value of the internal resistance is (real-time internal resistance-reference value)/reference value; and the specific value of the floating charging voltage is (Real-time floating charge voltage value - configure float charge voltage value) / Configure float charge voltage value; the specific value of the discharge number is the number of discharges / rated discharge times; the specific value of the use duration (current time - put into use) Time) / rated floating life; the specific value of the charging rate is the retained capacity / rated capacity.

Optionally, the float voltage, the number of discharges, or the second weight corresponding to the duration of use is less than 0.2; and the second weight corresponding to the charge ratio is greater than 0.2.

Optionally, the calculating the health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight includes:

Obtaining a corresponding specific formula or fixed value according to the specific value of the health parameter and obtaining the health score according to the same.

Optionally, after the sum of all the local health scores to obtain the health total score of the battery in the battery pack or the battery pack, the method further includes: repairing according to the local health score and the health total score Suggest.

In addition, in order to achieve the above object, the present invention further provides a battery health evaluation system, which includes:

The collecting unit is configured to collect and calculate specific values of the health parameters of the battery in the battery pack or the battery pack; the types of the health parameters include temperature, internal resistance, float voltage, number of discharges, duration of use, duration of undischarge, and charging At least one of the magnifications;

The first calculating unit is configured to obtain a corresponding first weight according to the specific value of the health parameter; and calculate a health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight;

a second calculating unit, configured to obtain a second weight corresponding to the health parameter according to the type of the health parameter; and calculate a local health score corresponding to the specific value of the health parameter according to the health score and the second weight;

And a third calculating unit, configured to add all the local health scores to obtain a health total score of the cells in the battery pack or the battery pack.

Optionally, the specific value of the temperature is a real-time monitoring value of the battery; The specific value is (real-time internal resistance value - reference value) / reference value; the specific value of the floating charging voltage is (real-time floating charging voltage value - configuring floating charging voltage value) / configuring floating charging voltage value; The specific value is the number of times of discharge / the number of rated discharges; the specific value of the use duration is (current time - time of use) / rated floating life; the specific value of the charge rate is the retained capacity / rated capacity.

Optionally, the float voltage, the number of discharges, or the second weight corresponding to the duration of use is less than 0.2; and the second weight corresponding to the charge ratio is greater than 0.2.

Optionally, the first calculating unit is further configured to obtain a corresponding specific formula or a fixed value according to the specific value of the health parameter, and obtain the health score according to the same.

Optionally, the method further includes a suggesting unit, configured to provide a repair suggestion according to the local health score and the health total score.

The method and system for evaluating the health state of the battery according to the present invention set different first weights according to the specific values of the health parameters, and sets different second weights for the types of health parameters, and generally evaluates the health status of all the batteries in the equipment room, and also targets different The state of health provides corresponding repair suggestions to facilitate maintenance personnel to effectively handle unhealthy batteries.

DRAWINGS

1 is a schematic flow chart of a method for evaluating a health state of a battery according to an embodiment of the present invention;

2 is a schematic flow chart of a method for evaluating a health state of a battery according to another embodiment of the present invention;

3 is a schematic structural diagram of a battery health evaluation system according to an embodiment of the present invention;

4 is a schematic structural diagram of a battery health evaluation system according to another embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a battery health evaluation system according to an embodiment of the present invention; FIG.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

In the following description, the use of suffixes such as "module", "component" or "unit" for indicating an element is merely an explanation for facilitating the present invention, and does not have a specific meaning per se. Therefore, "module" and "component" can be used in combination.

As shown in FIG. 1 , a first embodiment of the present invention provides a method for evaluating a health state of a battery, including the steps of:

S11. Collect and calculate specific values of health parameters of the battery in the battery pack or the battery pack;

The type of the health parameter includes at least one of temperature, internal resistance, float voltage, number of discharges, duration of use, duration of non-discharge, and charge rate (SOH);

S12. Obtain a corresponding first weight according to the specific value of the health parameter.

More specifically, different health parameters have different first weights in different numerical ranges, so it is necessary to first obtain the numerical range of the specific value of the health parameter, and then determine the first weight corresponding to the numerical range. ;

S13. Calculate a health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight;

In the specific implementation, the specific values of different health parameters may correspond to different calculation formulas, that is to say, different health parameters are different in different numerical ranges;

S14. Obtain a second weight corresponding to the health parameter according to the type of the health parameter;

S15. Calculate a local health score corresponding to the specific value of the health parameter according to the health score and the second weight;

Generally, the health score is multiplied by the second weight to obtain a local health score, but the present invention does not limit this;

S16. Add all the local health scores to obtain a health total score of the cells in the battery pack or the battery pack.

As shown in FIG. 2, a second embodiment of the present invention provides a method for evaluating a health state of a battery, which includes steps S21 to S26 which are the same as S11 to S16 mentioned in the first embodiment, specifically as described above, Let me repeat.

The difference is that, in this embodiment, after step S26, the method further includes:

S27. Suggest a repair according to the local health score and the total health score.

When the repair suggestion is given, specific repair suggestions can be given according to the scores of the local health scores. For example, when the temperature is too high or too low, it may be recommended to adjust the air conditioner temperature; when the internal resistance value is high, It is recommended to activate; the real-time floating charge voltage and the configuration float charge voltage are quite different, check the float charge Whether the voltage configuration is correct; when the number of discharges is too much, it is recommended to replace the battery; when using for a long time, it is recommended to replace the battery. When the battery is not discharged for a long time, it is recommended to perform remote discharge maintenance. When the SOH is small, it is recommended to replace the battery.

A third embodiment of the present invention provides a method for evaluating a health state of a battery, comprising the same steps as S11 to S16 mentioned in the first embodiment, or the same as S21 to S27 mentioned in the second embodiment, specifically as described above. The description will not be repeated here.

The difference is that, in this embodiment, in step S11 or S21, after acquiring all the battery lists of the current system, the collection and calculation of the specific values of the health parameters include:

Obtaining a monitoring quantity value of the real-time battery temperature; the specific value of the temperature is a real-time monitoring quantity value of the battery;

Obtain the monitoring value of the real-time battery internal resistance; obtain the battery internal resistance reference value in the database; calculate the conversion internal resistance value: (internal resistance value - reference value) / reference value; the specific value of the internal resistance is the conversion internal resistance Value, ie (real-time internal resistance - reference value) / reference value;

Obtain the monitoring value of the real-time battery float; obtain the configuration of the battery float voltage in the database; calculate the float voltage deviation: (real-time float voltage value - configure the float voltage value) / configure the float voltage value; The specific value of the charging voltage is the floating charging voltage deviation; it should be noted that the real-time floating charging voltage value of the battery can be detected when the battery is in the floating state, and the value is not detected in the equalizing and discharging states;

Calculate the number of discharges: 1 for the deep discharge meter, 1 for the non-deep discharge, and 1 for the number of discharges: the number of discharges/number of discharges; the specific value of the number of discharges is the percentage of the number of discharges;

The specific value of the use duration is (current time - put into use time) / rated floating life;

The specific value of the charging magnification is the retained capacity/rated capacity.

A fourth embodiment of the present invention provides a method for evaluating a health state of a battery, comprising the same steps as S11 to S16 mentioned in the first embodiment, or the same as S21 to S27 mentioned in the second embodiment, specifically as described above. The description will not be repeated here.

The difference is that, in this embodiment, step S15 or step S25 specifically includes: obtaining a corresponding specific formula or a fixed value according to the specific value of the health parameter, and obtaining the health score according to the same; It is said that the specific health value of the health parameter may be a specific formula related to the specific value of the health parameter, or may be a fixed value.

More specifically, when performing the calculation of the health score, the first weight is first determined according to the specific value of the health parameter, and the different health parameters have different first weights in different numerical ranges, and then, according to the monitoring The specific value of the parameter gets its corresponding specific formula or fixed value.

Please refer to Table 1, which is the specific value of the temperature provided by the embodiment and the corresponding value of the first weight;

Specific temperature value (t)	First weight
10°C≤t<20°C	a 1
20°C≤t≤25°C	0
25°C<t<35°C	a 2
35°C≤t≤45°C	a 3
45 °C>t or t<10°C

Table 1

The formula for calculating its health score is:

The specific value t of the temperature is the real-time monitoring value of the battery; if the specific value of the temperature is 30 ° C, then the corresponding first weight is a ₂ , and the corresponding health score is a specific formula, that is, v _t =100-a ₂ ×(t-25); if the specific value of the temperature is 20 ° C, then the corresponding first weight is 0, and the corresponding health score is a certain value, that is, 100; In the example, a ₁ =1, a ₂ =1, and a ₃ = 2.

When the health score of the temperature exceeds a preset threshold, a corresponding suggestion can be given, such as adjusting the air conditioner temperature.

Please refer to Table 2, which is the specific value of the internal resistance provided by the embodiment and the corresponding value of the first weight;

Specific value of internal resistance (r)	First weight
0≤r<0.05	b 1
0.05≤r<0.15	b 2
0.15 ≤ r < 0.25	b 3
0.25 ≤ r ≤ 0.35	b 4
r>0.35

Table 2

The formula for calculating its health score is:

The specific value u of the usage duration is (real-time internal resistance value - reference value) / reference value; if the specific value of the internal resistance is 0.10, then the corresponding first weight is b ₂ , and the corresponding health score is A specific formula, that is, v _r =100-b ₁ ×5-b ₂ ×(r-0.05)×100; if the specific value of the internal resistance is 0.5, then there is no corresponding first weight, and its corresponding health The score is a certain value, that is, 0; in this embodiment, b ₁ = 0.5, b ₂ =1, b ₃ = 2, and b ₄ = 3.

When the health score of the internal resistance exceeds a preset threshold, a corresponding suggestion can be given, such as activation.

Please refer to Table 3, Table 3 is the specific value of the floating charging voltage provided by the embodiment and the corresponding value of the first weight;

Specific value of float voltage (f)	First weight
0≤f<0.0025	0
0.0025≤f<0.025	d 1
0.025≤f<0.05	d 2
0.05≤f≤0.075	d 3
f>0.075

table 3

The formula for calculating its health score is:

The specific value f of the floating charging voltage is (real-time floating charging voltage value - configuring floating charging voltage value) / configuring the floating charging voltage value; if the specific value of the floating charging voltage is 0.02, then the corresponding first weight is d ₁ , the corresponding health score is a specific formula, that is, v _f =100-d ₁ ×f×1000; if the specific value of the internal resistance is 0.085, then there is no corresponding first weight, and its corresponding health The score is a certain value, that is, 0; in this embodiment, d ₁ = 0.5, d ₂ =1, and d ₃ = 2.

When the health score of the float voltage exceeds a preset threshold, a corresponding suggestion can be given, such as checking whether the float voltage configuration is correct.

Please refer to Table 4, Table 4 is the specific value of the number of discharges provided by the embodiment and the corresponding value of the first weight;

Specific value of the number of discharges (c)	First weight
0≤c<0.05	0
0.05≤c<0.5	k 1
0.5≤c<0.7	k 2
0.7≤c≤0.9	k 3
c>0.9

Table 4

The formula for calculating its health score is:

The specific value c of the number of discharges is the number of discharged times / the number of rated discharges; if the specific value of the number of discharges is 0.10, then the corresponding first weight is k ₁ , and the corresponding health score is a specific formula, that is, v _c =100-k ₁ ×c×100; if the specific value of the number of discharges is 0.98, then there is no corresponding first weight, and the corresponding health score is a certain value, that is, 0; in this embodiment, k ₁ = 0.1, k ₂ =1, k ₃ = 2.

When the health score of the number of discharges exceeds a preset threshold, a corresponding suggestion can be given, such as replacing the battery.

Please refer to Table 5, which is the specific value of the usage duration and the value of the corresponding first weight provided by the embodiment;

Specific value of the duration of use (u)	First weight
0≤u<0.1	0
0.1≤u<0.2	m 1
0.2≤u<0.3	m 2
0.3≤u≤0.6	m 3
0.6≤u≤0.9	m 4
u>0.9

table 5

The formula for calculating its health score is:

The specific value u of the duration of use is (current time - time of use) / rated floating life; if the specific value of the duration of use is 0.4, then the corresponding first weight is m ₃ , and the corresponding health score is one. The specific formula, that is, v _u =100-m ₁ ×10-m ₂ ×10-m ₃ ×(u-0.3)×100; if the specific value of the use duration is 0.95, then there is no corresponding first weight at this time, The corresponding health score is a certain value, that is, 0; in this embodiment, m ₁ = 0.5, m ₂ = 0.6, m ₃ =1, and m ₄ = 2.

When the health score of the duration of use exceeds a preset threshold, a corresponding suggestion can be given, such as replacing the battery.

Please refer to Table 6. Table 6 is the specific value of the undischarged duration and the corresponding first weight value provided by the embodiment. It should be noted that, in this embodiment, the specific value of the undischarged duration is in units of months. In the specific implementation, the invention may also be in units of quarters or days. The present invention does not limit this, and the calculation formula of the health score can be changed correspondingly according to the unit of the specific value of the undischarged duration.

Specific value of undischarged time (h)	First weight
0<h≤3	0
3<h≤6	n 1
6<h≤0	n 2
9<h≤12	n 3
h>12

Table 6

The formula for calculating its health score is:

The specific value h of the undischarged time is the number of times of discharge/rated discharge; if the specific value of the undischarged time is 4, then the corresponding first weight is n ₁ , and the corresponding health score is a specific formula. , that is, v _h =100-n ₁ ×h; if the specific value of the undischarged duration is 15, then there is no corresponding first weight, and the corresponding health score is a certain value, that is, 0; in this embodiment , n ₁ =1, n ₂ =1, n ₃ =1.

When the health score of the undischarged duration exceeds a preset threshold, a corresponding suggestion can be given, such as performing remote discharge maintenance.

Please refer to Table 7, which is the specific value of the charging magnification and the value of the corresponding first weight provided by the embodiment;

Specific value of charge rate (s)	First weight
0.9 ≤ s < 1	0
0.8 ≤ s < 0.9	p 1
0.65 ≤ s < 0.8	p 2
0.5≤s≤0.65	p 3
s<0.5

Table 7

The formula for calculating its health score is:

The specific value s of the charging magnification is the retained capacity/rated capacity; if the specific value of the charging magnification is 0.7, then the corresponding first weight is p ₂ , and the corresponding health score is a specific formula, that is, v _s =100-p ₁ ×10-p ₂ ×(0.9-s)×100; if the specific value of the charging magnification is 0.3, then there is no corresponding first weight, and the corresponding health score is a certain value, that is, 0; in this embodiment, p ₁ = 0.5, p ₂ = 0.6, and p ₃ =1.

When the health score of the charging rate exceeds a preset threshold, a corresponding suggestion can be given, such as replacing the battery.

In another embodiment of the present invention, the collection and calculation of the specific values of the health parameters are as shown in the third embodiment, as described above, and are not described herein again.

A fifth embodiment of the present invention provides a method for evaluating a health state of a battery, comprising the same steps as S11 to S16 mentioned in the first embodiment, or the same as S21 to S27 mentioned in the second embodiment, specifically as described above. The description will not be repeated here.

In this embodiment, the float voltage, the number of discharges, or the second weight corresponding to the duration of use is less than 0.2; and the second weight corresponding to the charge ratio is greater than 0.2.

In the specific implementation, the types of health parameters may include temperature, internal resistance, float voltage, number of discharges, duration of use, duration of non-discharge, and charging rate; at this time, corresponding health scores, second weights, and local health The scores are shown in Table 8 below:

Health parameter	Health score	Second weight	Local health score
temperature	v t	w 1	w 1 ×v t
Internal resistance	v r	w 2	w 2 ×v r
Floating charge	v f	w 3	w 3 ×v f
Number of discharges	v c	w 4	w 4 ×v c
Length of use	v u	w 5	w 5 ×v u
Undischarged time	v h	w 6	w 6 ×v h
Charging rate	v s	w 7	w 7 ×v s

Table 8

At this time, the corresponding total health score S is:

S=w ₁ ×v _t +w ₂ ×v _r +w ₃ ×v _f +w ₄ ×v _c +w ₅ ×v _u +w ₆ ×v _h +w ₇ ×v _s ;

Preferably, w ₁ = 0.15, w ₂ = 0.15, w ₃ = 0.05, w ₄ = 0.1, w ₅ = 0.1, w ₆ = 0.15, w ₇ = 0.3.

In another embodiment of the invention, the collection and calculation of specific values of health parameters includes content As shown in the third embodiment, as described above, it will not be described herein.

In a further embodiment of the present invention, the content included in step S15 or step S25 is as shown in the fourth embodiment, and is specifically described above, and details are not described herein again.

The health state evaluation method of the battery in the embodiment of the present invention has been described above. The battery health evaluation system in the embodiment of the present invention will be described below.

As shown in FIG. 3, a sixth embodiment of the present invention provides a battery health evaluation system, including an acquisition unit 10, a first calculation unit 20, a second calculation unit 30, and a third calculation unit 40.

The collecting unit 10 is configured to collect and calculate specific values of the health parameters of the battery in the battery pack or the battery pack; the types of the health parameters include temperature, internal resistance, float voltage, number of discharges, duration of use, duration of non-discharge, and charging At least one of the magnifications.

The first calculating unit 20 is configured to obtain a corresponding first weight according to the specific value of the health parameter, and calculate a health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight; More specifically, different health parameters have different first weights in different numerical ranges, so it is necessary to first obtain the numerical range of the specific value of the health parameter, and then determine the first weight corresponding to the numerical range; In the specific implementation, the specific values of different health parameters may correspond to different calculation formulas, that is to say, different health parameters have different calculation formulas applicable to different numerical ranges.

The second calculating unit 30 is configured to obtain a second weight corresponding to the health parameter according to the type of the health parameter; and calculate a local health score corresponding to the specific value of the health parameter according to the health score and the second weight; The local health score can be obtained by multiplying the health score by the second weight, but the present invention does not limit this.

The third calculating unit 40 is configured to add all of the partial health scores to obtain a health total score of the cells in the battery pack or battery pack.

A seventh embodiment of the present invention provides a battery health evaluation system, including an acquisition unit 10, a first calculation unit 20, a second calculation unit 30, a third calculation unit 40, and a suggestion unit 50.

The collecting unit 10, the first calculating unit 20, the second calculating unit 30, and the third calculating unit 40 in this embodiment are the same as the collecting unit 10, the first calculating unit 20, and the second calculating unit 30 in the sixth embodiment. The third calculating unit 40 is the same, as described above, and details are not described herein again.

The suggesting unit 50 in this embodiment is configured to give a repair suggestion according to the local health score and the health total score. The suggestion unit 50 may give specific repair suggestions according to the scores of the local health scores when giving the repair suggestion, for example, when the temperature is too high or too low, it may be recommended to adjust the air conditioner temperature; the internal resistance value is high When it is recommended, activation can be recommended; the real-time floating charging voltage and the configured floating charging voltage are greatly different, check whether the floating charging voltage configuration is correct; when the number of discharging is too much, it is recommended to replace the battery; when the usage time is long, it is recommended to replace the battery. When the battery is not discharged for a long time, it is recommended to perform remote discharge maintenance. When the SOH is small, it is recommended to replace the battery.

An eighth embodiment of the present invention provides a battery health evaluation system, including an acquisition unit 10, a first calculation unit 20, a second calculation unit 30, a third calculation unit 40, and a suggestion unit 50.

The collecting unit 10, the first calculating unit 20, the second calculating unit 30, and the third calculating unit 40 in this embodiment are the same as the collecting unit 10, the first calculating unit 20, and the second calculating unit 30 in the sixth embodiment. The third calculating unit 40 is the same, as described above, and details are not described herein again.

In this embodiment, the specific value of the temperature is a real-time monitoring value of the battery; the specific value of the internal resistance is (real-time internal resistance value - reference value) / reference value; the specific value of the floating charging voltage For (real-time float voltage value - configure float voltage value) / configure float voltage value; the specific number of discharge times is the number of discharges / rated discharge times; the specific value of the use duration (current time - input Use time) / rated floating life; the specific value of the charging rate is the retained capacity / rated capacity.

In another embodiment of the present invention, the suggestion unit is further included, as described in the sixth embodiment, and details are not described herein again.

Referring to FIG. 5, in the implementation of the present invention, related health detection instructions may be sent by the user to the platform server 200 through the WEB client 100; the health parameters collected by the collection unit are stored in the database 300, and the platform server 200 receives the relevant information. For the instruction, the relevant unit is called, the data in the database 300 is used for calculation and the result is saved, and the calculation result is finally returned to the WEB client 100.

The method and system for evaluating the health state of the battery provided by the present invention can calculate the health status of each battery or group of cells in the equipment room, and the operation and maintenance personnel or the user can quickly obtain the health status of the battery room of the equipment room, and quickly Which battery pack is located for a long time is not normal or which One of the battery cells is backward, which saves the time cost of human statistics, improves the accuracy of calculation, and gives corresponding solution suggestions for different indicators.

A ninth embodiment of the present invention provides a battery health evaluation system, including an acquisition unit 10, a first calculation unit 20, a second calculation unit 30, a third calculation unit 40, and a suggestion unit 50.

The collecting unit 10, the first calculating unit 20, the second calculating unit 30, and the third calculating unit 40 in this embodiment are the same as the collecting unit 10, the first calculating unit 20, and the second calculating unit 30 in the sixth embodiment. The third calculating unit 40 is the same, as described above, and details are not described herein again.

In this embodiment, the first calculating unit is further configured to obtain a corresponding specific formula or a fixed value according to the specific value of the health parameter, and obtain the health score according to the same. When calculating the health score, the first weight is determined according to the specific value of the health parameter. Different health parameters have different first weights in different numerical ranges, and then according to the specific value of the monitoring parameter. Get the corresponding formula or fixed value. Specifically, as described in the fourth embodiment, details are not described herein again.

In another embodiment of the present invention, the suggestion unit is further included, as described in the sixth embodiment, and details are not described herein again.

A tenth embodiment of the present invention provides a battery health evaluation system, including an acquisition unit 10, a first calculation unit 20, a second calculation unit 30, a third calculation unit 40, and a suggestion unit 50.

The collecting unit 10, the first calculating unit 20, the second calculating unit 30, and the third calculating unit 40 in this embodiment are the same as the collecting unit 10, the first calculating unit 20, and the second calculating unit 30 in the sixth embodiment. The third calculating unit 40 is the same, as described above, and details are not described herein again.

In this embodiment, the float voltage, the number of discharges, or the second weight corresponding to the duration of use is less than 0.2; and the second weight corresponding to the charge ratio is greater than 0.2. In a specific implementation, the type of the health parameter may include temperature, internal resistance, floating charging voltage, number of discharges, duration of use, duration of non-discharge, and charging magnification; more specifically, refer to Table 8 and corresponding in the fifth embodiment. The total health score S is not repeated here.

In another embodiment of the present invention, the suggestion unit is further included, as described in the sixth embodiment, and details are not described herein again.

It should be noted that, in this document, the terms "including", "comprising", or any other variations thereof are intended to encompass a non-exclusive inclusion, such that a process, method, article It includes not only those elements, but also other elements that are not explicitly listed, or elements that are inherent to such a process, method, item, or device. An element that is defined by the phrase "comprising a ..." does not exclude the presence of additional equivalent elements in the process, method, item, or device that comprises the element.

The serial numbers of the embodiments of the present invention are merely for the description, and do not represent the advantages and disadvantages of the embodiments.

Through the description of the above embodiments, those skilled in the art can clearly understand that the foregoing embodiment method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is better. Implementation. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk, The optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in various embodiments of the present invention.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Industrial applicability

The method and system for evaluating the health state of the battery according to the present invention set different first weights according to the specific values of the health parameters, and sets different second weights for the types of health parameters, and generally evaluates the health status of all the batteries in the equipment room, and also targets different The state of health provides corresponding repair suggestions to facilitate maintenance personnel to effectively handle unhealthy batteries.

Claims (10)

1. A method for evaluating a health status of a battery, the method comprising the steps of:

   Collecting and calculating a specific value of the health parameter of the battery in the battery pack or the battery pack; the type of the health parameter includes at least one of temperature, internal resistance, float voltage, number of discharges, duration of use, length of undischarged, and charging rate item;

   Obtaining a corresponding first weight according to the specific value of the health parameter;

   Calculating a health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight;

   Obtaining a corresponding second weight according to the type of the health parameter;

   Calculating a local health score corresponding to the specific value of the health parameter according to the health score and the second weight;

   All of the local health scores are summed to obtain a health total score for the cells within the battery pack or battery pack.
2. The method for evaluating a state of health of a battery according to claim 1, wherein the specific value of the temperature is a real-time monitoring value of the battery; and the specific value of the internal resistance is (real-time internal resistance-reference value)/reference a value of the floating charge voltage (real-time float voltage value - configuration float voltage value) / configuration float voltage value; the specific number of discharge times is the number of discharges / rated discharge times; The specific value of the duration is (current time - time of use) / rated floating life; the specific value of the charging rate is the retained capacity / rated capacity.
3. The method for evaluating a state of health of a battery according to claim 1, wherein the float voltage, the number of discharges, or the second weight corresponding to the duration of use is less than 0.2; and the second weight corresponding to the charge ratio is 0.2.
4. The health status evaluation method of the battery according to claim 1, wherein the calculating the health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight comprises:

   Obtaining a corresponding specific formula or fixed value according to the specific value of the health parameter and obtaining the health score according to the same.
5. The method for evaluating a state of health of a battery according to claim 1, wherein said summing all said partial health scores to obtain a health total score of said battery pack or a battery pack After that, the method further includes: providing a repair suggestion according to the local health score and the total health score.
6. A battery health evaluation system includes:

   The collecting unit is configured to collect and calculate specific values of the health parameters of the battery in the battery pack or the battery pack; the types of the health parameters include temperature, internal resistance, float voltage, number of discharges, duration of use, duration of undischarge, and charging At least one of the magnifications;

   The first calculating unit is configured to obtain a corresponding first weight according to the specific value of the health parameter; and calculate a health score corresponding to the specific value of the health parameter according to the specific value of the health parameter and the first weight;

   a second calculating unit, configured to obtain a second weight corresponding to the health parameter according to the type of the health parameter; and calculate a local health score corresponding to the specific value of the health parameter according to the health score and the second weight;

   And a third calculating unit, configured to add all the local health scores to obtain a health total score of the cells in the battery pack or the battery pack.
7. The battery health evaluation system according to claim 6, wherein the specific value of the temperature is a real-time monitoring value of the battery; and the specific value of the internal resistance is (real-time internal resistance-reference value)/reference a value of the floating charge voltage (real-time float voltage value - configuration float voltage value) / configuration float voltage value; the specific number of discharge times is the number of discharges / rated discharge times; The specific value of the duration is (current time - time of use) / rated floating life; the specific value of the charging rate is the retained capacity / rated capacity.
8. The battery health evaluation system according to claim 6, wherein the float voltage, the number of discharges, or the second weight corresponding to the duration of use is less than 0.2; and the second weight corresponding to the charge ratio is greater than 0.2.
9. The health status evaluation system for a battery according to claim 6, wherein the first calculating unit is further configured to acquire a corresponding specific formula or a fixed value according to the specific value of the health parameter and obtain the health score according to the battery .
10. The battery health evaluation system according to claim 6, further comprising a suggesting unit configured to give a repair suggestion based on said local health score and health total score.

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