TWI786863B - Battery health management method and battery health management device - Google Patents

Abstract

A battery health management method comprises: performing a charge-discharge process on a battery; determining whether the state of heath of the battery is below a threshold; increasing an expected charging voltage of the charge-discharge process when the state of health is lower than the threshold; keeping the expected charging voltage of the charge-discharge process when the state of health is not lower than the threshold; determining whether the expected charging voltage is equal to or greater than a rated charging voltage; performing the charge-discharge process according to the rated charging voltage when the expected charging voltage is equal to or greater than the rated charging voltage; and performing the charge-discharge process according to the expected charging voltage when the expected charging voltage is less than the rated charging voltage. Moreover, a battery health management device is presented.

Description

Battery health management method and battery health management device

The invention relates to a battery management method and a battery management device, in particular to a battery health management method and a battery health management device capable of improving the health state.

As people's demand for battery applications continues to increase, more attention is paid to health status and lifespan. Fig. 1 is the corresponding graph of the battery voltage and time of the battery of the conventional uninterruptible power supply system. The initial voltage (3.0V) rises to the rated voltage (4.1V). After the constant current/constant voltage charging is completed, the battery enters the static stage. During the static stage, the battery will discharge itself. When the battery voltage of the battery drops from the rated voltage to the recharge reference voltage (3.9V) through self-discharge, the The constant current/constant voltage charging method (CCCV) recharges the battery so that the battery voltage of the battery rises from the recharge reference voltage to the rated voltage.

Regarding the state of health of the battery (State of Health; SOH), the new battery is regarded as a 100% healthy state. With the use of the battery cycle charge and discharge, the capacity and performance of the battery will gradually deteriorate, so the estimated value of SOH It will gradually decrease from 100%, and finally SOH=0% means it is completely unusable. However, generally the battery will not be replaced until the battery is completely unable to discharge. Therefore, one SOH indication method is to warn the user to replace the battery as soon as possible when the SOH is lower than a preset threshold value.

The technical problem to be solved by the present invention is to provide a battery health management method and a battery health management device that can improve the battery health status in view of the deficiencies in the prior art.

In order to solve the above technical problems, one of the technical solutions adopted by the present invention is to provide a battery health management method, which includes: performing a charging and discharging procedure on the battery; judging whether the health status of the battery is lower than a threshold value; when the health status is lower than Threshold value, increase the expected charging voltage of the charging and discharging procedure; when the health status is not lower than the threshold value, maintain the expected charging voltage; judge whether the expected charging voltage is equal to or greater than the rated charging voltage; when the expected charging voltage is equal to or greater than the rated charging voltage, according to Performing a charging and discharging procedure on the battery at the rated charging voltage; and performing a charging and discharging procedure on the battery according to the expected charging voltage when the expected charging voltage is lower than the rated charging voltage.

In order to solve the above technical problems, another technical solution adopted by the present invention is to provide a battery health management device, and the battery health management device includes a first detection circuit, a second module and a controller. The first detection circuit is used for detecting the battery voltage and battery current of the battery. The second module is used to periodically detect the health status of the battery. The controller is electrically connected to the first detection circuit and the second module, and the controller is used to execute the battery health management method, and the battery health management method includes: performing a charging and discharging procedure on the battery; judging whether the health status of the battery is lower than a threshold value ;When the health status is lower than the threshold value, increase the expected charging voltage of the charging and discharging procedure; when the health status is not lower than the threshold value, maintain the expected charging voltage; determine whether the expected charging voltage is greater than or equal to the rated charging voltage; when the expected charging voltage is greater than or equal to the rated charging voltage, the battery is recharged and discharged according to the rated charging voltage; and when the expected charging voltage is lower than the rated charging voltage, the battery is recharged and discharged according to the expected charging voltage.

One of the beneficial effects of the present invention is that, through the battery health management device and battery health management method provided by the present invention, whenever the health state of the battery is lower than the threshold value, by increasing the voltage level of the expected charging voltage, the state of health can be improved. Threshold value exceeded. In this way, the time during which the state of health of the battery is higher than the threshold value can be greatly increased, thereby increasing the power supply time of the battery.

In order to enable a further understanding of the features and technical content of the present invention, please refer to the following detailed description and drawings of the present invention, but the provided drawings are only for reference and description, and It is not intended to limit the invention.

A: Battery health management device

1: The first detection circuit

11: The first input terminal

12: The first output terminal

2: The second module

21: The second input terminal

22: The second output terminal

3: Controller

31: The third input terminal

32: The fourth input terminal

33: The third output terminal

B: battery

S301: Use the constant current/constant voltage charging method to charge the battery so that the battery voltage of the battery reaches the expected charging voltage

S303: Leave the battery at rest so that the battery discharges itself according to the resting discharge rate until the battery voltage of the battery drops to the storage voltage

S305: Determine whether the state of health of the battery is lower than a threshold value

S307: Increase the expected charging voltage according to the fixed voltage increase

S309: Maintain expected charging voltage

S311: judging whether the expected charging voltage of the charging and discharging program is greater than or equal to the rated charging voltage

S313: Set the rated charging voltage as the expected charging voltage

S501: Use the constant current/constant voltage charging method to charge the battery so that the battery voltage of the battery reaches the expected charging voltage

S503: Drive the battery to discharge according to a fixed expected discharge rate, so that the battery voltage of the battery drops from the expected charging voltage to the storage voltage

S505: Rest the battery to make the battery discharge itself according to the static discharge rate

S507: Judging whether the health state of the battery is lower than the threshold value

S509: Increase the expected charging voltage according to the fixed voltage increase

S511: Maintain expected charging voltage

S513: judging whether the expected charging voltage of the charging and discharging program is greater than or equal to the rated charging voltage

S515: Set the rated charging voltage as the expected charging voltage

S601: Use the constant current/constant voltage charging method to charge the battery so that the battery voltage of the battery reaches the expected charging voltage

S603: Drive the battery to discharge according to a fixed expected discharge rate, so that the battery voltage of the battery drops from the expected charging voltage to the storage voltage

S605: Rest the battery to make the battery discharge itself according to the static discharge rate

S607: Judging whether the health state of the battery is lower than the threshold value

S609: Increase the expected charging voltage according to the non-fixed voltage increase

S611: Maintain expected charging voltage

S613: judging whether the expected charging voltage of the charging and discharging program is greater than or equal to the rated charging voltage

S615: Set the rated charging voltage to the expected charging voltage

S701: Use the constant current/constant voltage charging method to charge the battery so that the battery voltage of the battery reaches the expected charging voltage

S703: Drive the battery to discharge according to a non-fixed expected discharge rate, so that the battery voltage of the battery drops from the expected charging voltage to the storage voltage

S705: Resting the battery makes the battery discharge itself according to the resting discharge rate

S707: Judging whether the state of health of the battery is lower than a threshold value

S709: Increase the expected charging voltage according to the fixed voltage increase

S711: Maintain expected charging voltage

S713: judging whether the expected charging voltage of the charging and discharging program is greater than or equal to the rated charging voltage

S715: Set the rated charging voltage to the expected charging voltage

S801: Use the constant current/constant voltage charging method to charge the battery so that the battery voltage of the battery reaches the expected charging voltage

S803: Drive the battery to discharge according to a non-fixed expected discharge rate, so that the battery voltage of the battery drops from the expected charging voltage to the storage voltage

S805: Rest the battery to make the battery discharge itself according to the static discharge rate

S807: Determine whether the state of health of the battery is lower than a threshold value

S809: Increase the expected charging voltage according to the non-fixed voltage increase

S811: Maintain expected charging voltage

S813: judging whether the expected charging voltage of the charging and discharging program is greater than or equal to the rated charging voltage

S815: Set the rated charging voltage as the expected charging voltage

FIG. 1 is a graph corresponding to battery voltage and time of a conventional uninterruptible power system battery.

FIG. 2 is a functional block diagram of a battery health management device according to an embodiment of the present invention.

FIG. 3 is a flow chart of the battery health management method according to the first embodiment of the present invention.

FIG. 4A is a graph showing the relationship between battery voltage and time based on the battery health management method in FIG. 3 .

FIG. 4B is a graph corresponding to the relationship between battery state of health and time in FIG. 4A .

FIG. 5 is a flowchart of a battery health management method according to a second embodiment of the present invention.

FIG. 6 is a flowchart of a battery health management method according to a third embodiment of the present invention.

FIG. 7 is a flowchart of a battery health management method according to a fourth embodiment of the present invention.

FIG. 8 is a flowchart of a battery health management method according to a fifth embodiment of the present invention.

The following are specific examples to illustrate the implementation of the "battery health management method and battery health management device" disclosed in the present invention. Those skilled in the art can understand the advantages and effects of the present invention from the content disclosed in this specification. The present invention can be implemented or applied through other different specific embodiments, and various modifications and changes can be made to the details in this specification based on different viewpoints and applications without departing from the concept of the present invention. In addition, the drawings of the present invention are only for simple illustration, and are not drawn according to the actual size, which is stated in advance. The following embodiments will further describe the relevant technical content of the present invention in detail, but the disclosed content is not intended to limit the protection scope of the present invention.

It should be understood that although terms such as "first", "second", and "third" may be used herein to describe various elements or signals, these elements or signals should not be limited by these terms. These terms are primarily used to distinguish one element from another, or a number with another signal. In addition, the term "or" used herein may include any one or a combination of more of the associated listed items depending on the actual situation.

The state of health of the battery will continue to decline as the number of charging and discharging increases. When the state of health of the battery is lower than the threshold value, it means that the battery's available power supply time has dropped significantly and it is difficult to use normally. At this time, by increasing the voltage level of the expected charging voltage during charging, the health state of the battery can exceed the threshold value, and the expected charging voltage is increased in time according to the health state of the battery until the expected charging voltage reaches the rated charging voltage.

[first embodiment]

FIG. 2 is a functional block diagram of a battery health management device provided by an embodiment of the present invention. As shown in Figure 2, the battery health management device A includes a first detection circuit 1, a second module 2 and a controller 3, the first detection circuit 1 includes a first input terminal 11 and a first output Terminal 12 , the first input terminal 11 of the first detection circuit 1 is electrically connected to a battery B, so as to detect the battery voltage and battery current of the battery B. The second module 2 includes a second input terminal 21 and a second output terminal 22, the second input terminal 21 of the second module 2 is electrically connected to the battery B, and is used to periodically detect the health status of the battery B (State of Health; SOH). The controller 3 includes a third input terminal 31 , a fourth input terminal 32 and a third output terminal 33 . The third input terminal 31 and the fourth input terminal 32 of the controller 3 are respectively electrically connected to the first output terminal 12 of the first detection circuit 1 and the second output terminal 22 of the second module 2, whereby the controller 3 Obtain the battery voltage, battery current and health status of battery B. The third output terminal 33 of the controller 3 is electrically connected to the battery B and performs a battery health management method on the battery B according to the battery voltage, battery current and health status of the battery B, and the battery health management method will be illustrated in FIG. 3 .

For example, the health status of battery B is regularly checked about once a month. When the battery is fully charged and discharged (constant current 1A/constant voltage 4V, charge the battery to the expected charging voltage 4V, and stop until the current drops to the cut-off charging current 0.1A After charging, and then discharging to the cut-off voltage of 3V), the integral of discharge current and discharge time = obtain the current total capacity of the battery, and the current total capacity is divided by the initial total capacity = state of health.

Specifically, the type of the battery B that the battery health management device A is applicable to is not limited, and the battery B can be, for example, a battery of an uninterruptible power system or a fuel cell. The type of the controller 3 of the battery health management device A is not limited, and the controller 3 can be, for example, a microprocessor (Microprocessor) or a digital signal processor (Digital Signal Processor, DSP) or other similar devices or a combination of these devices . In addition, the first detection circuit 1 , the second module 2 and the controller 3 can be integrated in the same chip or be three different chips.

Regarding other embodiments of the battery health management device A, the first detection circuit 1 is also provided with a first wireless communication module, the second module 2 is also provided with a second wireless communication module, and the controller 3 is also provided with a first wireless communication module. Three wireless communication modules. The first wireless communication module and the second wireless communication module are connected to the third wireless communication module respectively, whereby the controller 3 can obtain the battery voltage and battery current detected by the first detection circuit 1 and the second The health status detected periodically by module 2.

FIG. 3 is a flow chart of the battery health management method according to the first embodiment of the present invention. In step S301, the battery B is charged using a constant current/constant voltage charging method (CC/CV), so that the battery voltage of the battery B reaches a desired charging voltage. Regarding the constant current/constant voltage charging method, the battery B is continuously charged at a constant current until the battery B reaches the expected charging voltage. Next, the battery B is charged with a constant voltage, so that the battery voltage of the battery B is maintained at the expected charging voltage, until the battery current of the battery drops to the cut-off charging current.

In step S303 , after the constant current/constant voltage charging method is finished, the battery B is left to discharge automatically according to the static discharge rate until the battery voltage of the battery B drops to the storage voltage. Step S301 to step S303 are the charging and discharging procedure of the battery B.

In step S305, it is judged whether the health state of the battery B is lower than a threshold value. When it is confirmed that the health state of the battery B is lower than the threshold value (for example, 60%), step S307 is executed. In step S307, the expected charging voltage is increased according to a fixed voltage increase amount. For example, each time the expected charging When the voltage is increased, the increased voltage increment is 0.05V. When it is confirmed that the health state of the battery B is not lower than the threshold value, step S309 is executed. In step S309, maintain the expected charging voltage, and then return to step S301.

In step S311, it is determined whether the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage. When it is confirmed that the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage, step S313 is executed. In step S313, set the rated charging voltage as the expected charging voltage, and then return to step S301. When it is confirmed that the expected charging voltage of the battery B is lower than the rated charging voltage, then return to step S301.

The battery health management method in FIG. 3 can be implemented by the battery health management device A in FIG. 2 , for example. In detail, step S301 and steps S305-S313 can be executed by the controller 3 of the battery health management device A. Referring to FIG. It can be understood that the battery health management method in FIG. 3 can also be executed by other hardware devices, and is not limited to be executed by the battery health management device A in FIG. 2 .

In order to understand the battery health management method proposed in FIG. 3 more clearly, an example is given below. FIG. 4A is a graph showing the relationship between battery voltage and time based on the battery health management method shown in FIG. 3 , and FIG. 4B is a graph corresponding to the relationship between the state of health of the battery and time in FIG. 4A . Referring to Figure 4A and Figure 4B together, between the time point T0 and the time point T1, the battery is charged using the constant current/constant voltage charging method, wherein the charging current is 1A, the cut-off charging current is 0.1A, and the initial expected charging The voltage is 4.0V. After charging battery B with the constant current/constant voltage charging method each time, then let battery B stand still to discharge battery B according to the resting discharge rate until the battery voltage drops from the expected charging voltage to the storage voltage, and the storage voltage is 3.90V. From time point T0 to time point T1, the health status continues to drop from 100% to 70%, and the preset health status threshold is 75%.

Since the state of health of the battery B is lower than the threshold value at the time point T1, when the battery B is charged next time, the expected charging voltage is increased from 4.0V to 4.05V. Between the time point T1 and the time point T2, the battery B is also charged by the constant current/constant voltage charging method, the difference is that the expected charging voltage has been changed from 4.0V to 4.05V. Similarly, each charge with constant current/constant voltage After the battery B is charged by the electric method, the battery B is then left to discharge according to the static discharge rate until the battery voltage drops from the expected charging voltage to the storage voltage. From the time point T1 to the time point T2, the state of health of the battery B continues to drop from 85% to 70%.

Since the state of health of the battery B is lower than the threshold value at the time point T2, the expected charging voltage is increased from 4.05V to 4.10V again. After the time point T2, the battery B is also charged by the constant current/constant voltage charging method, the difference is that the expected charging voltage is changed from 4.05V to 4.10V. At this time, since the expected charging voltage has reached the rated charging voltage (4.10V), the battery B is subsequently charged according to the rated charging voltage.

[Second embodiment]

FIG. 5 is a flowchart of a battery health management method according to a second embodiment of the present invention. Compared with the battery health management method of the first embodiment in FIG. 3, the battery health management method of the second embodiment in FIG. Discharge at the expected discharge rate. After the battery B is driven to discharge according to the fixed expected discharge rate, the battery B enters the resting stage, and the detailed steps in FIG. 5 are as follows.

In step S501, the battery B is charged using a constant current/constant voltage charging method (CC/CV), so that the battery voltage of the battery B reaches a desired charging voltage. In step S503, after the constant current/constant voltage charging method is completed, the battery B is driven to discharge according to a fixed expected discharge rate, so that the battery voltage of the battery B drops from the expected charging voltage to the storage voltage. In detail, after the constant current/constant voltage charging method is completed, the battery B is driven to discharge according to the constant current, so that the battery voltage of the battery B drops from the expected charging voltage to the storage voltage. In step S505, after the battery voltage of the battery B drops from the expected charging voltage to the storage voltage, the battery B is left to discharge itself according to the static discharge rate until the battery voltage of the battery B drops to the storage voltage. In addition, the fixed expected discharge rate in step S503 is greater than the resting discharge rate of the battery in the resting phase in step S505. Steps S501 to S505 are the charging and discharging procedure of the battery B.

In step S507, it is judged whether the health state of the battery B is lower than a threshold value. When it is confirmed that the health state of the battery B is lower than the threshold value, step S509 is executed. In step S509, the expected charging voltage is increased according to a fixed voltage increase amount. When it is confirmed that the health status of the battery B is not lower than the threshold value, step S511 is executed. In step S511, maintain the expected charging voltage, and then return to step S501.

In step S513, it is determined whether the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage. When it is confirmed that the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage, step S515 is executed. In step S515, set the rated charging voltage as the expected charging voltage, and then return to step S501. When it is confirmed that the expected charging voltage of the battery B is lower than the rated charging voltage, then return to step S501.

The battery health management method in FIG. 5 can be implemented by the battery health management device A in FIG. 2 , for example. In detail, step S501 , step S503 and steps S507 - S515 can be executed by the controller 3 of the battery health management device A. Referring to FIG. It can be understood that the battery health management method in FIG. 5 can also be executed by other hardware devices, and is not limited to be executed by the battery health management device A in FIG. 2 .

[Third embodiment]

FIG. 6 is a flowchart of a battery health management method according to a third embodiment of the present invention. Compared with the battery health management method of the first embodiment in FIG. 3, the battery health management method of the third embodiment in FIG. The discharge is performed at the expected discharge rate, and after the battery B is driven to discharge according to the fixed expected discharge rate, the battery B enters the static stage. When it is confirmed that the health state of the battery B is lower than the threshold value, the expected charging voltage is increased according to the non-fixed voltage increase amount. For example, when the expected charge voltage is increased for the first time, the increased voltage increase is 0.03V, and when the expected charge voltage is increased for the second time, the increased voltage increase is changed from 0.03V to 0.05V, and Fig. 6 The detailed steps are described below.

In step S601, the battery B is charged using a constant current/constant voltage charging method (CC/CV), so that the battery voltage of the battery B reaches a desired charging voltage. In step S603, at the end of constant current/ After the constant voltage charging method, the battery B is driven to discharge according to a fixed expected discharge rate, so that the battery voltage of the battery B drops from the expected charging voltage to the storage voltage. In step S605 , after the battery voltage of the battery B drops from the expected charging voltage to the storage voltage, the battery B is left to discharge automatically according to the resting discharge rate. In addition, the fixed expected discharge rate in step S603 is greater than the resting discharge rate of the battery in the resting phase in step S605. Steps S601 to S605 are the charging and discharging procedure of the battery B.

In step S607, it is determined whether the health state of the battery B is lower than a threshold value. When it is confirmed that the health state of the battery B is lower than the threshold value, step S609 is executed. In step S609, increase the expected charging voltage according to the non-fixed voltage increase amount. When it is confirmed that the health state of the battery B is not lower than the threshold value, step S611 is executed. In step S611, maintain the expected charging voltage, and then return to step S601.

In step S613, it is determined whether the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage. When it is confirmed that the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage, step S615 is executed. In step S615, set the rated charging voltage as the expected charging voltage, and then return to step S601. When it is confirmed that the expected charging voltage of the battery B is lower than the rated charging voltage, then return to step S601.

The battery health management method in FIG. 6 can be implemented by the battery health management device A in FIG. 2 , for example. In detail, step S601 , step S603 and steps S607 - S615 can be executed by the controller 3 of the battery health management device A. Referring to FIG. It can be understood that the battery health management method in FIG. 6 can also be executed by other hardware devices, and is not limited to be executed by the battery health management device A in FIG. 2 .

[Fourth embodiment]

FIG. 7 is a flowchart of a battery health management method according to a fourth embodiment of the present invention. Compared with the battery health management method of the first embodiment in FIG. 3, the battery health management method of the fourth embodiment in FIG. The expected discharge rate is discharged, and the battery B is driven to discharge according to the non-fixed expected discharge rate. After the row discharge, the battery B enters the rest period, and the detailed steps of FIG. 7 are as follows.

In step S701, the battery B is charged using a constant current/constant voltage charging method (CC/CV), so that the battery voltage of the battery B reaches a desired charging voltage. In step S703, after the constant current/constant voltage charging method is completed, the battery B is driven to discharge according to a non-fixed expected discharge rate, so that the battery voltage of the battery B drops from the expected charging voltage to the storage voltage. In detail, the battery B is not discharged with a constant current, and the discharge current of the battery B is not a fixed value. For example, the discharge current of the battery B may continuously increase or decrease with time. In step S705 , after the battery voltage of the battery B drops from the expected charging voltage to the storage voltage, the battery B is left to discharge automatically according to the resting discharge rate. In addition, the non-fixed expected discharge rate in step S703 is greater than the resting discharge rate of the battery in the resting phase in step S705. Step S701 to step S705 are the charging and discharging procedure of the battery B.

In step S707, it is determined whether the health state of the battery B is lower than a threshold value. When it is confirmed that the health state of the battery B is lower than the threshold value, step S709 is executed. In step S709, the expected charging voltage is increased according to a fixed voltage increase amount. When it is confirmed that the health state of the battery B is not lower than the threshold value, step S711 is executed. In step S711, maintain the expected charging voltage, and then return to step S701.

In step S713, it is determined whether the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage. When it is confirmed that the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage, step S715 is executed. In step S715, set the rated charging voltage as the expected charging voltage, and then return to step S701. When it is confirmed that the expected charging voltage of the battery B is lower than the rated charging voltage, then return to step S701.

The battery health management method in FIG. 7 can be implemented by the battery health management device A in FIG. 2 , for example. In detail, step S701 , step S703 and steps S707 - S715 can be executed by the controller 3 of the battery health management device A. Referring to FIG. It can be understood that the battery health management method in FIG. 7 can also be executed by other hardware devices, and is not limited to be executed by the battery health management device A in FIG. 2 .

[Fifth Embodiment]

FIG. 8 is a flowchart of a battery health management method according to a fifth embodiment of the present invention. Compared with the battery health management method of the first embodiment in FIG. 3, the battery health management method of the fifth embodiment in FIG. The expected discharge rate is discharged, and after the battery B is driven to discharge according to the non-fixed expected discharge rate, the battery B enters the static stage. When it is confirmed that the health status of the battery B is lower than the threshold value, the expected charging voltage is increased according to the non-fixed voltage increase amount. For example, when the expected charging voltage is increased for the first time, the increased voltage increment is 0.01V, and when the expected charged voltage is increased for the second time, the increased voltage increment is changed from 0.01V to 0.02V, and the figure 8 The detailed steps are as follows.

In step S801, the battery B is charged using a constant current/constant voltage charging method (CC/CV), so that the battery voltage of the battery B reaches a desired charging voltage. In step S803, after the constant current/constant voltage charging method is completed, the battery B is driven to discharge according to a non-fixed expected discharge rate, so that the battery voltage of the battery B drops from the expected charging voltage to the storage voltage. In step S805 , after the battery voltage of the battery B drops from the expected charging voltage to the storage voltage, the battery B is left to discharge itself according to the resting discharge rate. In addition, the non-fixed expected discharge rate in step S803 is greater than the resting discharge rate of the battery in the resting phase in step S805. Steps S801 to S805 are the charging and discharging procedure of the battery B.

In step S807, it is determined whether the health state of the battery B is lower than a threshold value. When it is confirmed that the health state of the battery B is lower than the threshold value, step S809 is executed. In step S809, increase the expected charging voltage according to the non-fixed voltage increase amount. When it is confirmed that the health status of the battery B is not lower than the threshold value, step S811 is executed. In step S811, maintain the expected charging voltage, and then return to step S801.

In step S813, it is determined whether the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage. When it is confirmed that the expected charging voltage of the charging and discharging procedure is greater than or equal to the rated charging voltage, step S815 is executed. In step S815, set the rated charging voltage as the expected charging voltage, and then Return to step S801. When it is confirmed that the expected charging voltage of the battery B is lower than the rated charging voltage, then return to step S801.

The battery health management method in FIG. 8 can be implemented by the battery health management device A in FIG. 2 , for example. In detail, step S801, step S803 and steps S807-S815 can be executed by the controller 3 of the battery health management device A. Referring to FIG. It can be understood that the battery health management method in FIG. 8 can also be executed by other hardware devices, and is not limited to be executed by the battery health management device A in FIG. 2 .

[Advantageous Effects of Embodiment]

One of the beneficial effects of the present invention is that, through the battery health management device and battery health management method provided by the present invention, whenever the health state of the battery is lower than the threshold value, by increasing the voltage level of the expected charging voltage, the state of health can be improved. Threshold value exceeded. In this way, the time during which the state of health of the battery is higher than the threshold value can be greatly increased, thereby increasing the power supply time of the battery. In addition, when the battery is discharged at an expected discharge rate greater than the static discharge rate, the time required for the battery voltage to drop from the rated voltage to the storage voltage can be greatly reduced. In this way, the time during which the battery voltage of the battery is higher than the storage voltage is greatly shortened, and the purpose of delaying battery aging can also be achieved.

The content disclosed above is only a preferred feasible embodiment of the present invention, and does not therefore limit the scope of the patent application of the present invention. Therefore, all equivalent technical changes made by using the description and drawings of the present invention are included in the application of the present invention. within the scope of the patent.

S301: Use the constant current/constant voltage charging method to charge the battery so that the battery voltage of the battery reaches the expected charging voltage

S303: Leave the battery at rest so that the battery discharges itself according to the resting discharge rate until the battery voltage of the battery drops to the storage voltage

S305: Determine whether the state of health of the battery is lower than a threshold value

S307: Increase the expected charging voltage according to the fixed voltage increase

S309: Maintain expected charging voltage

S311: judging whether the expected charging voltage of the charging and discharging program is greater than or equal to the rated charging voltage

S313: Set the rated charging voltage as the expected charging voltage

Claims (9)

A battery health management method, comprising: performing a charging and discharging program on a battery, wherein the charging and discharging program includes: charging the battery through a constant current/constant voltage charging method, so that a battery voltage of the battery reaches an expected charge voltage; and resting the battery to discharge the battery according to a resting discharge rate until the battery voltage of the battery drops from the expected charging voltage to a storage voltage; judging whether a state of health of the battery is lower than a Threshold value; when the health status is lower than the threshold value, increase the expected charging voltage of the charging and discharging procedure; when the health status is not lower than the threshold value, maintain the expected charging voltage; determine whether the increased expected charging voltage Equal to or greater than a rated charging voltage; when the expected charging voltage after the increase is equal to or greater than the rated charging voltage, perform the charging and discharging procedure on the battery according to the rated charging voltage; and when the expected charging voltage after the increase is less than the The rated charging voltage, and then perform the charging and discharging procedure on the battery according to the expected charging voltage after the increase. A battery health management method, comprising: performing a charging and discharging program on a battery, wherein the charging and discharging program includes: charging the battery through a constant current/constant voltage charging method, so that a battery voltage of the battery reaches an expected charge Voltage; drive the battery to discharge according to a fixed expected discharge rate, so that the battery voltage drops from the expected charging voltage to a storage voltage; determine whether a state of health of the battery is lower than a threshold; when the state of health is low At the threshold value, increase the expected charging voltage of the charging and discharging process; When the health state is not lower than the threshold value, maintain the expected charging voltage; determine whether the increased expected charging voltage is equal to or greater than a rated charging voltage; when the increased expected charging voltage is equal to or greater than the rated charging voltage, Re-executing the charging and discharging procedure for the battery according to the rated charging voltage; and performing the charging and discharging procedure for the battery again according to the increased expected charging voltage when the increased expected charging voltage is lower than the rated charging voltage. A battery health management method, comprising: performing a charging and discharging program on a battery, wherein the charging and discharging program includes: charging the battery through a constant current/constant voltage charging method, so that a battery voltage of the battery reaches an expected charge voltage; drive the battery to discharge according to a non-fixed discharge rate so that the battery voltage drops from the expected charging voltage to a storage voltage; determine whether a state of health of the battery is lower than a threshold value; when the state of health is lower than The threshold value increases the expected charging voltage of the charging and discharging procedure; when the health status is not lower than the threshold value, maintains the expected charging voltage; judges whether the increased expected charging voltage is equal to or greater than a rated charging voltage; The expected charging voltage after the increase is equal to or greater than the rated charging voltage, and the charging and discharging procedure is performed on the battery according to the rated charging voltage; and when the expected charging voltage after the increase is lower than the rated charging voltage, Perform the charging and discharging procedure on the battery with the expected charging voltage. The battery health management method according to claim 1, wherein increasing the expected charging voltage includes increasing the expected charging voltage according to a fixed voltage increase. The battery health management method according to claim 1, wherein increasing the expected charging voltage includes increasing the expected charging voltage according to a non-fixed voltage increase pressure. A battery health management device, comprising: a first detection circuit for detecting a battery voltage and a battery current of a battery; a second module for periodically detecting a health state of the battery; and a control The controller is electrically connected to the first detection circuit and the second module, and the controller is used to execute a battery health management method, and the battery health management method includes: performing a charging and discharging procedure on the battery, wherein the charging The discharge procedure includes: charging the battery through a constant current/constant voltage charging method, so that the battery voltage of the battery reaches an expected charging voltage; driving the battery to discharge according to a fixed expected discharge rate, so that the battery voltage Dropping the expected charging voltage to a storage voltage; judging whether a health state of the battery is lower than a threshold value; when the health state is lower than the threshold value, increasing the expected charging voltage of the charging and discharging process; when the health state If the expected charging voltage is not lower than the threshold value, maintain the expected charging voltage; judge whether the increased expected charging voltage is greater than or equal to a rated charging voltage; when the increased expected charging voltage is greater than or equal to the rated charging voltage, charge according to the rated charging voltage performing the charging and discharging procedure on the battery; and when the increased expected charging voltage is lower than the rated charging voltage, performing the charging and discharging procedure on the battery again according to the increased expected charging voltage. The battery health management device according to claim 6, wherein the first detection circuit includes a first input terminal and a first output terminal, the second module includes a second input terminal and a second output terminal, The controller includes a third input terminal, a first Four input terminals and a third output terminal, the first input terminal and the second input terminal are respectively electrically connected to the battery, the first output terminal and the second output terminal are respectively electrically connected to the third input terminal and the fourth input end, the third output end is electrically connected to the battery. The battery health management device as claimed in claim 6, wherein the controller increases the expected charging voltage according to a fixed voltage increase amount. The battery health management device as claimed in claim 6, wherein the controller increases the expected charging voltage according to a non-fixed voltage increase amount.

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