WO2017024883A1

WO2017024883A1 - Method and apparatus for implementing charge and discharge control

Info

Publication number: WO2017024883A1
Application number: PCT/CN2016/085152
Authority: WO
Inventors: 邵滨; 曹捷; 周保航; 滕凌巧; 秦世好
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-08-11
Filing date: 2016-06-07
Publication date: 2017-02-16
Also published as: CN106451582A

Abstract

A method and an apparatus for implementing charge and discharge control. The method comprises: setting a charge and discharge priority of each group of batteries in a system according to a preset priority strategy (100); and charging or discharging each group of batteries according to a priority order on the basis of a corresponding preset charge and discharge control state of each group of batteries in each charge and discharge stage (101).

Description

Method and device for realizing charge and discharge control

Technical field

The present application relates to, but is not limited to, new energy technologies, and more particularly to a method and apparatus for implementing charge and discharge control.

Background technique

With the development of new energy technologies, the role of batteries in communication base stations (including communication devices or communication sites) is quietly changing: originally used as a backup battery, now more and more used in daily work, cyclic power supply . At the same time, based on the type of battery and application scenarios, the configuration of different batteries has also formed a new application program. Common solutions include battery functions from lithium batteries, fast charge batteries, fuel cells, solar cells, etc. , choose several of them for configuration and use. In addition, some communication devices or communication sites were originally equipped with other types of batteries, such as lead-acid batteries, which are expected to continue to be used based on cost or some engineering considerations. In this case, other batteries are generally used while remaining. One or more other types of batteries are powered, or are configured to use the same type of old and new batteries at the same time.

Since different types of batteries and different old and new batteries have different charging and discharging performance, it is unreasonable to use different types of batteries for mixed charging and discharging control, which may cause some types of batteries to fail to exert their own characteristics or affect the service life of the batteries; The use of batteries with different degrees of old and new, there is an unreasonable charge and discharge control, which will cause the deterioration of new batteries to accelerate, for example, setting the same charge and discharge control parameters, resulting in accelerated deterioration of new batteries, affecting system stability.

In summary, the battery charge and discharge is unreasonable, and it is easy to shorten the service life of the battery; in addition, the use of new and old batteries at the same time, charging and discharging are unreasonable, and will affect the system stability.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

This paper provides a method and device for implementing charge and discharge control, which can perform the battery in the system. Reasonable charge and discharge control to improve battery life.

A method for achieving charge and discharge control, comprising:

Set the charge and discharge priority of each battery in the system according to a preset priority policy;

Each group of batteries is separately subjected to charge and discharge processing in accordance with a priority order according to a corresponding charge and discharge control state set in each charge and discharge stage of each set of batteries set in advance.

Optionally, before the charging and discharging priority of each battery in the system is set according to a preset priority policy, the method further includes:

Collect relevant parameter information of each group of batteries in the system separately, and determine the charging and discharging stages of each group of batteries;

The battery includes: batteries of different types of charging and/or batteries of different degrees of age.

Optionally, the preset priority policy is:

A priority policy based on the charge and discharge speed of the battery, and/or the degree of newness, and/or cost, and/or whether the battery is chargeable and set.

Optionally, the relevant parameter information includes: a current value, and/or a voltage value, and/or a battery temperature.

Optionally, the charge and discharge phase includes:

Charging phase, full phase and discharge phase.

Optionally, the charge and discharge control state is:

Allow charging, allow discharge; or,

Charge is allowed, discharge is prohibited; or,

Charge is prohibited, discharge is allowed; or,

Charging is prohibited and discharge is prohibited.

Optionally, setting the charge and discharge control state includes:

By turning off the preset relay, the diode connected in series on the charging circuit is in the forward conduction state, and the charging permission is set;

By turning on the preset relay, the diode connected in series on the charging circuit is in an open state, and the charging prohibition is set;

By turning off the preset relay, the diode in series on the discharge circuit is in a forward conduction state, and the discharge permission is set;

By turning on the preset relay, the diode in the series connected to the discharge circuit is in an open state, and the discharge is prohibited.

Optionally, when the battery pack of the fuel cell is included in the system, the method further includes:

When the fuel inventory of the fuel cell is less than a preset alarm threshold, an alarm message is generated and fed back for fuel replenishment.

An apparatus for implementing charge and discharge control, comprising: a priority unit and a control unit; wherein

The priority unit is set to: set a charge and discharge priority of each battery in the system according to a preset priority policy;

The control unit is configured to perform charge and discharge processing for each group of batteries in accordance with a priority order according to a corresponding charge and discharge control state set in each charge and discharge stage of each set of batteries set in advance.

Optionally, the device further includes: an acquiring unit, configured to separately collect relevant parameter information of each group of batteries in the system, and determine a charging and discharging phase of each group of batteries;

Optionally, the control unit is configured to

By opening the preset relay, the diode in the series connected to the discharge circuit is in an open state, and the discharge is prohibited;

According to the above settings, each group of batteries is separately charged and discharged in the order of priority.

Optionally, the device further includes an alarm unit configured to: when the system includes the fuel cell In the pool group, if the fuel inventory of the fuel cell is less than a preset alarm threshold, an alarm message is generated and fed back for fuel replenishment.

A computer readable storage medium storing computer executable instructions for performing the method of any of the above.

Compared with the related art, the technical solution of the present application includes: setting a charge and discharge priority of each battery in the system according to a preset priority policy; and corresponding charging and discharging according to each preset battery in each charging and discharging phase. In the control state, each group of batteries is separately charged and discharged in accordance with the priority order. After determining the priority of each group of batteries by the priority policy, the method according to the embodiment of the present invention performs charging and discharging control for each group of batteries according to a corresponding charging and discharging control state set in each charging and discharging stage of each set of batteries. It can control the battery in the system reasonably, and improve the service life of the battery.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

1 is a flowchart of a method for implementing charge and discharge control according to an embodiment of the present invention;

2 is a structural diagram of an apparatus for implementing charge and discharge control according to an embodiment of the present invention;

3 is a block diagram showing the structure of a system according to a fifth embodiment of the present invention;

Figure 4 is a flow chart of a method according to a fifth embodiment of the present invention;

Figure 5 is a flow chart of a method in accordance with a sixth embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments in the present application may be arbitrarily combined with each other.

FIG. 1 is a flowchart of a method for implementing charge and discharge control according to an embodiment of the present invention. As shown in FIG. 1 , the method includes:

Step 100: Set a charging and discharging priority of each battery in the system according to a preset priority policy.

In this step, the preset priority policy is:

A priority strategy for the charge and discharge sequence of each battery set according to the charge and discharge speed of the battery, and/or the age, and/or cost, and/or whether the battery is rechargeable.

According to the charging and discharging speed, and/or the old and new, and/or the cost, and/or whether the battery is chargeable, the charging and discharging sequence may be determined according to the experience of the person skilled in the art on the battery performance, the cost, the use environment, etc.; The same battery may have the same parameters, such as the same old and new, the same cost, different technicians can set different priority order.

This step can also include:

The relevant parameter information of each battery in the system is separately collected, and the charging and discharging phases of each battery are determined; here, the battery includes: batteries with different charging types and/or batteries with different degrees of old and new.

Optionally, the related parameter information includes: a current value, and/or a voltage value, and/or a battery temperature.

The charge and discharge phase includes:

Charging phase, full phase and discharge phase.

Step 101: Perform charge and discharge processing on each set of batteries according to a priority order according to a corresponding charge and discharge control state set in each charge and discharge stage of each set of batteries set in advance.

In this step, the charge and discharge control state is:

Allow charging, allow discharge; or,

Charge is allowed, discharge is prohibited; or,

Charge is prohibited, discharge is allowed; or,

Charging is prohibited and discharge is prohibited.

Optionally, setting the charge and discharge control state includes:

When the battery pack of the fuel cell is included in the system, the method of the embodiment of the invention further includes:

After determining the priority of each group of batteries by the priority policy, the method according to the embodiment of the present invention performs charging and discharging control for each group of batteries according to a corresponding charging and discharging control state set in each charging and discharging stage of each set of batteries. It can control the battery in the system reasonably, and improve the service life of the battery.

On the other hand, when there are new and old batteries in the system at the same time, the stability of the system can be improved by reasonable control of charge and discharge.

The embodiment of the invention further provides a computer readable storage medium storing computer executable instructions for performing the above method for implementing charge and discharge control.

2 is a structural diagram of an apparatus for implementing charge and discharge control according to an embodiment of the present invention, as shown in FIG. 2, including:

Priority unit 21 and control unit 22; wherein

The priority unit 21 is configured to: set a charge and discharge priority of each battery in the system according to a preset priority policy;

The control unit 22 is configured to perform charge and discharge processing for each group of batteries in accordance with a priority order according to a corresponding charge and discharge control state set in each charge and discharge stage of each battery set in advance.

The control unit 22 is set to

The device of the embodiment of the present invention may further include an acquisition unit 23 configured to: separately collect relevant parameter information of each battery in the system, and determine a charging and discharging phase of each battery;

The battery includes: batteries with different types of charging and/or batteries of different degrees of age.

The device of the embodiment of the present invention further includes an alarm unit 24 configured to: when the fuel cell of the fuel cell contains less than a preset alarm threshold, generate and feed back alarm information for fuel supplement.

Example 1

The system of the embodiment comprises a set of fast charging batteries and a set of fuel cells, and the two sets of batteries are used in combination during system operation.

According to the embodiment, the method for obtaining energy according to the fuel cell is to increase the reactants such as hydrogen, and obtain the electric energy by using the chemical reaction, which is not rechargeable; the fast charging battery can be charged, so the charging and discharging are preferentially used according to the preset priority policy. In combination with the characteristics that the fuel cell is not rechargeable, when the system is charging, only the fast charge battery is charged. When discharging, the fast charge battery discharge is preferentially used to supply power to the system load. The fuel cell supplies power to the system load only after the fast charge battery has been discharged and the system's direct power supply module is unable to supply power to the system load.

Collecting relevant parameter information of each battery in the system separately, determining a charging and discharging phase of each battery; wherein the relevant parameter information includes current value, and/or voltage value, and/or battery temperature, and the determined charging and discharging phase includes : charging phase, full phase and discharging phase.

According to the setting of the charge and discharge priority of each battery in the system and the judgment of the charge and discharge phase of the battery by the above-mentioned scheme, the corresponding charge and discharge control is set according to each set of batteries in each charge and discharge stage. State, each group of batteries are separately charged and discharged;

In the charging phase, the charging and discharging control state of the fast charging battery is set as: charging permission and discharge permission; the charging and discharging control state of the fuel cell is: charging prohibition, discharge prohibition;

further,

If it is converted from the discharge phase of the fast charge battery to the battery charge phase, the charge and discharge control state is performed by the working state of the charge and discharge circuit.

The charging circuit of the fast charging battery remains conductive;

The discharge circuit of the fast charge battery remains conductive;

The charging circuit of the fuel cell remains disconnected;

The discharge circuit of the fuel cell remains disconnected.

If it is converted from the discharge phase of the fuel cell to the charging phase of the fast charge battery, the working state of the charge and discharge control state through the charge and discharge circuit is:

The discharge circuit of the fuel cell is disconnected;

The charging circuit of the fast charging battery is turned on;

The discharge circuit of the fast charge battery is turned on;

The fuel cell's charging circuit remains disconnected.

Optionally, the conversion of the working states of the charging and discharging circuits is sequentially performed in sequence;

Here, if the fast charge battery is full, it enters the battery full phase;

When the fast charge battery is full, according to the relevant parameter information, it is detected that the fast charge battery charge current is greater than the set charge current threshold, then the charging circuit of the fast charge battery is disconnected to prevent the battery from overcharging.

In the full phase, the charge and discharge control state of the fast charge battery is: charging is prohibited, discharge is allowed; the charge and discharge control state of the fuel battery is: charging is prohibited, discharge is prohibited;

The working state transition of the charge and discharge circuit is performed in order:

The charging circuit of the fast charging battery is disconnected; the discharging circuit of the fast charging battery is turned on;

The charging circuit of the fuel cell is disconnected; the discharge circuit of the fuel cell is disconnected.

During the discharge phase, when the direct power supply module is unable to supply power to the system load, the system supplies power through the fast charge battery and the fuel cell. Priority is given to discharge the system load by the fast charge battery discharge; To ensure that the direct power supply module can restore the power supply, the fast charge battery can be charged at the first time. The charge circuit of the fast charge battery needs to be converted into the charge enable by the battery full phase charge. The working state transition of the charge and discharge circuit is executed in sequence:

The charging circuit of the fast charging battery is turned on;

The discharge circuit of the fast charge battery remains conductive;

The charging circuit of the fuel cell remains disconnected;

The discharge circuit of the fuel cell remains disconnected;

During the discharge process of the fast charge battery, according to the relevant parameter information, it is detected that the discharge current of the fast charge battery exceeds the set discharge current threshold, then the discharge circuit of the fast charge battery is disconnected, and the fuel cell is discharged to prevent the battery from being over-discharged;

When the fast charge battery is discharged or over-discharged, the power module directly supplied by the power supply still cannot supply power to the system load, and the fuel cell discharge is required to supply power to the load; the working state transition of the charge and discharge circuit is executed in sequence:

The charging circuit of the fast charging battery is disconnected;

The discharge circuit of the fuel cell is turned on;

The discharge circuit of the fast charge battery is disconnected;

The fuel cell's charging circuit remains disconnected.

Here, the charging circuit of the fast charging battery is switched from on to off to prevent the fuel cell from charging the fast charging battery;

Whether the battery is in the charging phase, or in the charging phase and the discharging phase, when the fuel inventory of the fuel cell such as hydrogen is less than a preset alarm threshold, the embodiment sends the alarm information from the fuel cell to the unit for collecting the battery related parameter information. Through the background of the system, the alarm information of the fuel inventory is fed back to the user to add fuel for the fuel cell; here, the alarm information can be transmitted through wired communication means such as RS232, RS485, CAN, IP, etc., and wireless communication means such as GPRS, Bluetooth, 3G, etc. achieve.

Example 2

The system of the embodiment comprises a set of lead-acid batteries and a set of iron-lithium batteries, and the two sets of batteries are in the system Mixed use in the process.

According to the characteristics of the high-current charge and discharge of the iron-lithium battery, the present embodiment preferentially uses the iron-lithium battery for charging and discharging according to a preset priority policy, that is, when the iron-lithium battery is fully charged, the lead-acid battery is charged; When it is discharged, it is preferentially discharged by the iron-lithium battery. When the iron-lithium battery is discharged, it is discharged by the lead-acid battery.

In this embodiment, the mains/oil machine is used as the input of the direct power supply module of the system (station), and the direct power supply module converts the commercial power into direct current to supply power to the system.

For the mains/oiler power supply scenario, the power supply priority can be set. For example, the power supply priority of the DC power supply module that can be set as the input of the mains/oil machine is greater than the battery power supply priority, if the DC power supply module can work. If you do not use the battery to work, if the power supply priority of the battery is high, then the battery is used first. After the battery is discharged, the DC power supply module with the mains/oil machine as input is used for power supply.

In this embodiment, the power supply priority of the DC power supply module that sets the mains/oil machine as the input is greater than the battery power supply priority.

If the utility/oiler is powered off and resumes power supply, the ability to power the system load and the battery is restored; that is, the iron-lithium battery is switched from the discharge phase to the charging phase due to the recovery of the utility/oiler.

For lead-acid batteries and iron-lithium batteries, during the charging phase,

In the charging phase, the charging and discharging control state of the iron-lithium battery is set as follows: charging is allowed, discharge is allowed; the charge-discharge control state of the lead-acid battery is: charging is prohibited, discharge is prohibited; after the iron-lithium battery is full, if lead-acid is judged according to relevant parameter information The battery does not need to be charged, and the system directly enters the battery full phase; if it is judged that the lead acid battery needs to be charged due to long-term placement, self-discharge, etc., the system charges the lead-acid battery, and enters the battery full phase after completion;

When the mains/oil machine is powered off and resumes power supply, if it is discharged by the lead-acid battery, the system enters the battery charging stage from the discharge stage of the lead-acid battery; since the discharge priority of the iron-lithium battery is higher than that of the lead-acid battery, the iron is indicated at this time. The lithium battery has been discharged, and the iron-lithium battery needs to be charged; according to the priority of charge and discharge of each battery, it is determined to charge the iron-lithium battery first, and then charge the lead-acid battery. After the iron-lithium battery is fully charged, switch to the lead-acid battery for charging. In order to prevent the batteries from being charged and discharged, the switching of the working state of the charging and discharging circuit is performed in order:

The charging circuit of the iron-lithium battery is disconnected;

The discharge circuit of the lead-acid battery is turned on;

The discharge circuit of the iron-lithium battery is disconnected;

The charging circuit of the lead-acid battery is turned on.

In the charging stage of lead-acid battery, the charge-discharge control state of the iron-lithium battery is: charging is prohibited, discharge is prohibited; the charge-discharge control state of the lead-acid battery is: charging permission, discharge permission;

When the lead-acid battery is full, the battery enters the full phase;

When the lead-acid battery is full, according to the relevant parameter information, if the lead-acid battery charging current is greater than the set charging current threshold, the charging circuit of the lead-acid battery is disconnected to prevent the battery from overcharging.

In the full phase: after the lead-acid battery is full, enter the battery full phase, at this time, the charge and discharge circuit of the iron-lithium battery is disconnected. In order to make the iron-lithium battery priority, it is necessary to switch to the charge and discharge circuit of the iron-lithium battery pack, in order to To prevent mutual charging between the batteries, the working state transition of the charging and discharging circuits of each group of batteries is performed in order:

The charging circuit of the lead-acid battery is disconnected;

The discharge circuit of the iron-lithium battery is turned on;

The discharge circuit of the lead-acid battery is disconnected;

The charging circuit of the iron-lithium battery is turned on.

That is, in the battery full phase, the charge and discharge control state of the iron-lithium battery is: charging permission, discharge permission; the charge-discharge control state of the lead-acid battery is: charging is prohibited, and discharging is prohibited.

After the iron-lithium battery is fully charged, if the lead-acid battery does not need to be charged according to the relevant parameter information, the system enters the battery full phase and maintains the working state of the original charging and discharging circuit, that is, the charging and discharging control state of the iron-lithium battery is: charging permission , discharge is allowed; the charge and discharge control state of the lead-acid battery is: charging is prohibited, discharge is prohibited;

When the current battery pack is switched to another battery pack for charging and discharging control state operation, when an abnormal discharge condition of the fully charged battery is detected according to the relevant parameter information, the discharge circuit of the battery may be disconnected as needed to prevent each battery pack from being discharged. Mutual charge.

In the discharge phase, during the discharge phase of the iron-lithium battery, the charge-discharge control state of the iron-lithium battery is: Allow, discharge is allowed; the charge and discharge control state of the lead-acid battery is: charging is prohibited, discharge is prohibited;

After the iron-lithium battery is discharged, if the mains/oil machine still has no electric energy output, the lead-acid battery continues to discharge. At this time, the lead-acid battery is discharged. In order to prevent the batteries from charging each other, the working state of the charging and discharging circuit is switched. Execute in order as:

The charging circuit of the iron-lithium battery is disconnected;

The discharge circuit of the lead-acid battery is turned on;

The discharge circuit of the iron-lithium battery is disconnected;

The charging circuit of the lead-acid battery is turned on;

That is, in the discharge phase of the lead-acid battery, the charge-discharge control state of the iron-lithium battery is: charging is prohibited, discharge is prohibited; the charge-discharge control state of the lead-acid battery is: charging permission, discharge permission;

In the discharge phase, when it is detected according to the relevant parameter information that the discharge current exceeds the set discharge current threshold, the discharge circuit of the battery is disconnected to prevent the battery from being over-discharged.

Example 3

In this embodiment, the system includes two sets of rechargeable batteries of the same type but different degrees of old and new. The two sets of batteries are used in combination during system operation. In this embodiment, since the battery is not old or new, if the same charging coefficient is used for charging, the degree of wear of the old battery may be accelerated. Therefore, when charging, different charging coefficients are used for different old and new batteries; If it is, the loss of the new battery will be too fast, so the old and new batteries will be charged and discharged separately.

In the charging phase, the following two situations are included:

The first case: the new battery charging phase, the new battery charge and discharge control state is: charging permission, discharge permission; the old battery charge and discharge control state is: charging is prohibited, discharge is prohibited;

The second case: after the new battery is fully charged, if the old battery needs to be charged, it will enter the old battery charging phase. When the current battery pack is switched to another battery pack for charging and discharging control state operation, in order to prevent the batteries from charging each other, The operation state transition of the charge and discharge circuits of one battery is performed in order:

The charging circuit of the new battery is disconnected;

The discharge circuit of the old battery is turned on;

The discharge circuit of the new battery is disconnected;

The charging circuit of the old battery is turned on.

That is, in the old battery charging phase, the charge and discharge control state of the new battery is: charging is prohibited, discharge is prohibited; the charge and discharge control state of the old battery is: charging permission, discharge permission;

After the new battery is full, if the old battery does not need to be charged, it will enter the battery full phase directly;

After the old battery is full, it enters the battery full phase;

In the battery charging phase, when it is detected according to the relevant parameter information that the new battery or the old battery charging current is greater than the set charging current threshold, the breaker charging circuit is prevented from overcharging the battery.

In the full phase, there are two situations:

The first case: after the new battery is full, if the old battery does not need to be charged, enter the battery full phase, and keep the charge and discharge control state unchanged, that is, the charge and discharge control state of the new battery is: charging permission, discharge permission; old battery The charge and discharge control state is: charging is prohibited, discharge is prohibited;

The second case: after the old battery is full, enter the battery full phase, at this time the new battery charge and discharge circuit is disconnected, in order to allow the new battery to be used preferentially, it is necessary to perform battery charge and discharge control state transition, in order to prevent between the batteries Charging each other, the working state transition of each group of battery charge and discharge circuits is executed in order:

The charging circuit of the old battery is disconnected;

The discharge circuit of the new battery is turned on;

The discharge circuit of the old battery is disconnected;

The charging circuit of the new battery is turned on.

That is, when the battery is fully charged, the charge and discharge control state of the new battery is: charging permission, discharge permission; the charge and discharge control state of the old battery is: charging is prohibited, discharge is prohibited;

When the current battery pack is switched to another battery pack for charging and discharging control state operation, when an abnormal discharge condition of the fully charged battery is detected according to the relevant parameter information, the discharge circuit of the battery may be disconnected as needed to prevent mutual mutual interaction between the batteries. Charge.

Discharge stage: new and old batteries are separately discharged to supply power to the load; in order to give full play to battery performance, new power The pool discharge priority is higher than the old battery discharge.

In the new battery discharge phase, the charge and discharge control state of the new battery is: charging permission, discharge permission; the old battery charge and discharge control state is: charging is prohibited, discharge is prohibited.

After the new battery is discharged, if the direct power supply module still has no power output, the old battery continues to discharge. At this time, the old battery discharge phase is entered, and when the current battery pack is switched to another battery pack for charging and discharging control state operation, in order to prevent The batteries are charged to each other, and the working state transition of the charging and discharging circuits of the old and new batteries is performed in order:

The charging circuit of the new battery is disconnected;

The discharge circuit of the old battery is turned on;

The discharge circuit of the new battery is disconnected;

The charging circuit of the old battery is turned on.

That is, in the old battery discharge phase, the charge and discharge control state of the new battery is: charging is prohibited, discharge is prohibited; the charge and discharge control state of the old battery is: charging permission, discharge permission;

During the discharge phase of the new battery and the old battery, according to the relevant parameter information, it is detected that the discharge current of the fast charge battery exceeds the set discharge current threshold, and then the discharge circuit of the fast charge battery is disconnected to prevent the battery from being over-discharged.

Example 4

The system of the present embodiment comprises a set of fuel cells, a set of new lead-acid batteries and a set of old lead-acid batteries, which are used in combination during system operation.

In this embodiment, the new and old lead-acid batteries adopt different charging coefficients, while in the discharge, the lead-acid batteries are preferentially used, and finally the fuel cells are discharged. The process is as follows:

The charging phase consists of two situations:

The first case: the new lead-acid battery charging phase, the new lead-acid battery charge and discharge control state is: charging permission, discharge permission; old lead-acid battery charge and discharge control state is: charging is prohibited, discharge is prohibited; fuel cell charge and discharge control The status is: charging is prohibited, discharge is prohibited;

The second case: After the new lead-acid battery is full, if the old lead-acid battery needs to be charged, it will enter the charging stage of the old lead-acid battery. When the current battery pack is switched to another battery pack for charging and discharging control, each battery pack The working state transition of the charge and discharge circuit is performed in order:

The charging circuit of the new lead-acid battery is disconnected;

The discharge circuit of the old lead-acid battery is turned on;

The discharge circuit of the new lead-acid battery is disconnected;

The charging circuit of the old lead-acid battery is turned on;

The fuel cell charge and discharge circuit remains unchanged;

That is, in the charging stage of the old lead-acid battery, the charge-discharge control state of the old lead-acid battery is: charging permission, discharge permission; the charge-discharge control state of the new lead-acid battery is: charging prohibition, discharge prohibition; fuel cell charge and discharge control state For: charging is prohibited, discharge is prohibited;

After the new lead-acid battery is full, if the old lead-acid battery does not need to be charged, it will directly enter the battery full phase; if the old lead-acid battery needs to be charged, after the old lead-acid battery is full, it will enter the battery full phase;

If the system is switched from the fuel cell discharge phase to the new lead-acid battery charging phase, the operating state transitions of the charge and discharge circuits of each battery are performed in sequence:

The discharge circuit of the new lead-acid battery is turned on;

The discharge circuit of the fuel cell is disconnected;

The charging circuit of the new lead-acid battery is turned on;

The charging circuit of the fuel cell remains disconnected;

The state of the charge and discharge control unit of the old lead-acid battery remains unchanged.

In the battery charging phase, when it is detected according to the relevant parameter information that the battery charging current is greater than the set charging current threshold, the charging circuit of the lead-acid battery is disconnected to prevent the battery from being overcharged.

There are two situations in the full phase:

The first case: after the new lead-acid battery is full, if the old lead-acid battery does not need to be charged, it enters the battery full phase. At this time, the charge and discharge circuits of the old lead-acid battery are disconnected, and the charge and discharge circuits of the fuel battery are at Disconnected; in order to give full play to the performance of the new lead-acid battery, the new lead-acid battery is preferred, and the charge and discharge control state of the new lead-acid battery remains unchanged;

That is, the battery is fully charged, the charge and discharge control state of the new lead-acid battery: charging permission, discharge permission; charge and discharge control state of the old lead-acid battery: charging is prohibited, discharge is prohibited; fuel cell charging and discharging The electric control state is: charging is prohibited, discharge is prohibited;

The second case: after the old lead-acid battery is full, it enters the battery full phase. At this time, the charging and discharging circuits of the new lead-acid battery are disconnected, and the charging and discharging circuits of the fuel cell are disconnected; in order to fully utilize the new lead-acid battery The performance, priority to use the new lead-acid battery, need to carry out battery charge and discharge control state transition, in order to prevent mutual charging between the batteries, the working state transition of each group of battery charge and discharge circuits is executed in order:

The charging circuit of the old lead-acid battery is disconnected;

The discharge circuit of the new lead-acid battery is turned on;

The discharge circuit of the old lead-acid battery is disconnected;

The charging circuit of the new lead-acid battery is turned on;

The fuel cell charge and discharge control state remains unchanged;

That is, when the battery is fully charged, the charge and discharge control state of the new lead-acid battery is: charging permission, discharge permission; the charge and discharge control state of the old lead-acid battery is: charging is prohibited, discharge is prohibited; the charge and discharge control state of the fuel cell is: charging Prohibited, discharge prohibited;

During the battery charge and discharge control state transition, when an abnormal discharge condition occurs in the fully charged battery according to the relevant parameter information, the discharge circuit of the battery can be disconnected as needed to prevent mutual charge between each battery.

The discharge phase consists of three cases:

The first case: the new lead-acid battery discharge stage, the new lead-acid battery charge and discharge control state is: charging allowed, discharge allowed; the old lead-acid battery charge and discharge control state is: charging is prohibited, discharge is prohibited; fuel cell charging and discharging The control state is: charging is prohibited, discharge is prohibited;

The second case: after the new lead-acid battery is discharged, if the power module directly supplied by the power supply still has no power output, the old lead-acid battery continues to be discharged. At this time, the discharge phase of the new lead-acid battery needs to be switched to the discharge of the old lead-acid battery. In the stage, when the current battery pack is switched to another battery pack for charging and discharging control state operation, in order to prevent the batteries from charging each other, the working state transition of each group of battery charging and discharging circuits is performed in order:

The charging circuit of the new lead-acid battery is disconnected;

The discharge circuit of the old lead-acid battery is turned on;

The discharge circuit of the new lead-acid battery is disconnected;

The discharge circuit of the old lead-acid battery is turned on;

The charge and discharge control state of the fuel cell remains unchanged;

That is, in the discharge stage of the old lead-acid battery, the charge-discharge control state of the new lead-acid battery is: charging is prohibited, discharge is prohibited; the charge and discharge control state of the old lead-acid battery is: charging permission, discharge permission; fuel cell charge and discharge control state For: charging is prohibited, discharge is prohibited;

The third case: If the old lead-acid battery is discharged, if the power module directly supplied has no energy output, the fuel cell continues to discharge. At this time, the discharge phase of the old lead-acid battery is switched to the fuel cell discharge stage. When the charge/discharge control state transition is performed, in order to prevent the batteries from charging each other, the operation state transition of the charge and discharge circuits of each battery is sequentially performed as follows:

The charging circuit of the old lead-acid battery is disconnected;

The discharge circuit of the fuel cell (system) is turned on;

The discharge circuit of the old lead-acid battery is disconnected;

The charging circuit of the fuel cell remains disconnected;

The charge control status of the new lead-acid battery remains unchanged;

That is, in the fuel cell discharge phase, the charge and discharge control state of the fuel cell is: charging is prohibited, discharge is allowed; the charge and discharge control state of the new lead acid battery is: charging is prohibited, discharge is prohibited; the charge and discharge control state of the old lead acid battery is: Charging is prohibited and discharge is prohibited.

In order to clearly explain the operating state transition process of the battery charging circuit and the discharging circuit, the present application will be described below by way of Embodiment 5 and Embodiment 6.

Example 5

3 is a block diagram of a system structure according to a fifth embodiment of the present invention. As shown in FIG. 3, the system includes a directly powered power module 31, two sets of batteries 32, a system load 33, and a detection circuit 34, wherein one set of batteries is fast charged. The battery and the other battery are fuel cells. The fast charge battery and the fuel battery are in the negative system. Two diodes and two relays are respectively connected to the series line for carrying out the control of charging prohibition, charging permission, discharge permission and discharge prohibition state. The battery management module 35 manages the directly powered power module 31 and the battery pack 32.

In this embodiment, when the power module 31 is directly powered, the power module 31 directly supplies power to the system load 33. FIG. 4 is a flowchart of the method according to the fifth embodiment of the present invention, as shown in FIG. The battery charging process includes:

Step 400: Determine, according to a fuel cell and a fast charge battery charge and discharge control state, whether to switch the charging phase by the fuel cell discharge process; wherein, according to the relevant parameter information of the fuel cell and the fast charge battery, determine whether the fuel cell is used before charging the fast charge battery The discharge is switched over, if not, then proceeds to step 401 to determine whether the fast charge battery needs to be charged; if so, it indicates that the fast charge battery has been discharged, and proceeds to step 402;

Step 401: Determine whether the fast charge battery needs to be charged; if charging is required, proceed to step 402; if charging is not required, end the charging process.

Step 402: Disconnect the fuel cell discharge circuit and turn on the fast charge battery charging circuit. Taking the circuit of FIG. 3 as an example, if the battery pack 1 in FIG. 3 is a fast charge battery and the battery pack 2 is a fuel battery, the fuel cell is disconnected. The relay K _{D2 of the} discharge circuit closes the relay K _C1 of the fast charging battery charging circuit to realize the charging circuit of the fast charging battery, and at the same time prevent the fuel cell from charging the fast charging battery.

Step 403: Turn on the fast charging battery discharge circuit, and keep the charging circuit of the fuel cell disconnected; that is, close the relay K _{D1 of the} fast charging battery charging circuit, where the closing relay K _D1 can make the fast charging battery discharging circuit be allowed to discharge (pre- Turn-on state), to ensure that when the directly powered power module resumes power supply, the fast charge battery can be charged immediately; ensure that the fuel cell charging circuit K _{C2 is} disconnected, and the fuel cell does not need to be charged.

Step 404: Determine, according to the battery related parameter information of the fast charge battery, that the fast charge battery is full, and complete the charging.

In the process of charging the fast charge battery, in order to ensure that the system does not lose power when the power supply module cannot supply power, the discharge circuit of the fast charge battery is always allowed to discharge.

Example 6

In this embodiment, two sets of batteries are respectively used as a fast charge battery and a fuel battery, and a fast charge battery and A clear and detailed description of the discharge process of the fuel cell, when the directly powered power module is unable to supply power to the system load, the fast charge battery and the fuel cell supply power to the system load. FIG. 5 is a flowchart of a method according to a sixth embodiment of the present invention. As shown in FIG. 5, the method includes:

Step 500: When the directly supplied power supply module supplies power to the system load, turn on the discharge circuit and the charging circuit of the fast charge battery, and when the power supply module directly powered off is powered off, use the fast charge battery to supply power to the system load; Group 1 is a fast charge battery, and battery pack 2 is a fuel battery. For example, the relay K _D1 is turned off to turn on the discharge circuit of the fast charge battery. When the power supply module that directly supplies power is restored, the fast charge battery can be charged for the first time. The relay K _C1 of the charging circuit of the rechargeable battery remains closed;

After the step 500 is performed, the charge and discharge control state control of the fuel cell is sequentially performed;

Step 501, the discharge circuit of the fuel cell remains disconnected, and the charging circuit remains disconnected; here, to prevent mutual charging between the batteries during charging of the fast charging battery, the discharge circuit of the fuel cell remains disconnected, and the fuel cell does not need to be charged, and the charging circuit Keep disconnected;

Step 502: During the discharging process of the fast charging battery, determine whether the power module directly supplied by the power supply resumes power supply. If it recovers, the discharging phase of the fast charging battery ends; if not, the process proceeds to step 503 to determine the completion of discharging;

Step 503: Determine, according to the relevant parameter information of the battery, whether the fast charge battery is discharged, that is, whether the discharge voltage threshold is reached, and if not, continue to discharge, and continue to determine whether the power module directly powered in step 502 restores the power supply; and reaches the discharge voltage threshold. Switching to the discharge phase 504 of the fuel cell;

Step 504, switching to a discharge phase of the fuel cell; wherein, the charging circuit of the fast-charge battery is disconnected, the discharge circuit of the fuel cell is turned on, the discharge circuit of the fast-charge battery is disconnected, and the fuel cell charging circuit is kept disconnected; The charging circuit relay K _{C1 of the} fast charging battery is disconnected to prevent the fuel cell from charging the fast charging battery; the relay K _{D2 of the} fuel cell discharging circuit is closed; the fast charging battery discharging circuit relay K _{D1 is} disconnected, and the fuel cell charging circuit relay K is disconnected. _C2 to prevent overcharge of the fast charge battery;

Step 505, when the fuel cell is discharged, it is determined that the directly powered power module restores the power supply, the discharge phase ends; if the directly powered power module does not restore the power supply, step 506 is performed;

Step 506, it is determined whether the fuel cell is discharged; when the discharge is not completed, the step 505 is performed simultaneously with the discharge; when the discharge is completed, the step 507 is performed;

Step 507, ending the fuel cell discharge.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium, such as on a corresponding hardware platform (eg, The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

The embodiments disclosed in the present application are as described above, but the description is only for the purpose of understanding the present application, and is not intended to limit the present application. Any modifications and changes in the form and details of the embodiments may be made by those skilled in the art without departing from the spirit and scope of the disclosure. The scope defined by the appended claims shall prevail.

Industrial applicability

After determining the priority of each battery group by the priority policy, the charging and discharging control is performed on each battery according to the corresponding charging and discharging control state set in each charging and discharging phase of each battery set in advance. Reasonable charge and discharge control of the battery in the system to improve the service life of the battery.

Claims

A method for achieving charge and discharge control, comprising:

Set the charge and discharge priority of each battery in the system according to a preset priority policy;

Each group of batteries is separately subjected to charge and discharge processing in accordance with a priority order according to a corresponding charge and discharge control state set in each charge and discharge stage of each set of batteries set in advance.
The method according to claim 1, wherein the method further comprises: prior to setting a charge and discharge priority of each battery in the system according to a preset priority policy;

Collect relevant parameter information of each group of batteries in the system separately, and determine the charging and discharging stages of each group of batteries;

The battery includes: batteries of different types of charging and/or batteries of different degrees of age.
The method according to claim 1 or 2, wherein the preset priority policy is:

A priority policy based on the charge and discharge speed of the battery, and/or the degree of newness, and/or cost, and/or whether the battery is chargeable and set.
The method of claim 2, wherein the related parameter information comprises: a current value, and/or a voltage value, and/or a battery temperature.
The method of claim 4 wherein said charging and discharging phase comprises:

Charging phase, full phase and discharge phase.
The method according to claim 1 or 2, wherein said charge and discharge control state is:

Allow charging, allow discharge; or,

Charge is allowed, discharge is prohibited; or,

Charge is prohibited, discharge is allowed; or,

Charging is prohibited and discharge is prohibited.
The method of claim 6 wherein said setting the charge and discharge control state comprises:

By turning off the preset relay, the diode connected in series on the charging circuit is in the forward conduction state, and the charging permission is set;

By turning on the preset relay, the diode connected in series on the charging circuit is in an open state, and the charging prohibition is set;

By turning off the preset relay, the diode in series on the discharge circuit is in a forward conduction state, and the discharge permission is set;

By turning on the preset relay, the diode in the series connected to the discharge circuit is in an open state, and the discharge is prohibited.
The method according to claim 1 or 2, wherein when the battery pack of the fuel cell is included in the system, the method further comprises:

When the fuel inventory of the fuel cell is less than a preset alarm threshold, an alarm message is generated and fed back for fuel replenishment.
An apparatus for implementing charge and discharge control, comprising: a priority unit and a control unit; wherein

The priority unit is set to: set a charge and discharge priority of each battery in the system according to a preset priority policy;

The control unit is configured to perform charge and discharge processing for each group of batteries in accordance with a priority order according to a corresponding charge and discharge control state set in each charge and discharge stage of each set of batteries set in advance.
The device according to claim 9, further comprising: an acquisition unit, configured to separately collect relevant parameter information of each battery in the system, and determine a charging and discharging phase of each battery;

The battery includes: batteries of different types of charging and/or batteries of different degrees of age.
The apparatus according to claim 9 or 10, wherein the control unit is configured to

By turning off the preset relay, the diode connected in series on the charging circuit is in the forward conduction state, and the charging permission is set;

By turning on the preset relay, the diode connected in series on the charging circuit is in an open state, and the charging prohibition is set;

By turning off the preset relay, the diode in series on the discharge circuit is in a forward conduction state, and the discharge permission is set;

By opening the preset relay, the diode in the series connected to the discharge circuit is in an open state, and the discharge is prohibited;

According to the above settings, each group of batteries is separately charged and discharged in the order of priority.
The device according to claim 9 or 10, further comprising an alarm unit configured to: when the battery pack of the fuel cell is included in the system, if the fuel inventory of the fuel cell is less than a preset alarm threshold, generate Feedback alarm information for fuel replenishment.