WO2017113896A1

WO2017113896A1 - Combined power supply device and combined power supply method

Info

Publication number: WO2017113896A1
Application number: PCT/CN2016/099607
Authority: WO
Inventors: 许玉琴; 乐斌; 叶利强
Original assignee: 华为技术有限公司
Priority date: 2015-12-31
Filing date: 2016-09-21
Publication date: 2017-07-06
Also published as: CN105471089B; CN105471089A

Abstract

Disclosed are a combined power supply device and a combined power supply method. The device comprises: a primary battery module (11), a backup battery module (12), a pulse charging module (13), a control module (14), a power supply module (15), and a load (16). The power supply module (15) is used to power the load (16). The control module (14) is used to control the primary battery module (11) to power the load (16) when the power supply module (15) stops supplying power, and to control the backup battery module (12) to power the load (16) when a preset parameter of the primary battery module (11) meets a first condition. The control module (14) is further used to control the power supply module (15) to perform equalization charging to the backup battery module (12) after the power supply module (15) resumes supplying power to the load (16), and to control the power supply module (15) to perform equalization charging to the primary battery module (11) when the equalization charging to the backup battery module (12) is completed. The pulse charging module (13) is used to perform pulse charging to the backup battery module (12) when a preset parameter of the backup battery module (12) meets a second condition.

Description

Hybrid power supply device and hybrid power supply method

The present application claims priority to Chinese Patent Application No. 201511030803.2, entitled "Hybrid Power Supply Device and Hybrid Power Supply Method" on December 31, 2015, the entire contents of which are incorporated herein by reference. in.

Technical field

The present invention relates to the field of power supply, and in particular to a hybrid power supply device and a hybrid power supply method.

Background technique

With the rapid development of mobile communication, there are more and more unattended outdoor base stations. Since most outdoor base stations are generally located in remote areas, their grid environment is poor, and there are widespread power outages and even long power outages. A solution to this problem is that the base station adopts a hybrid power supply system in which a main battery and a backup battery are disposed, and the main battery and the backup battery are used to supply power to the load when a power outage occurs.

In the prior art, lead-acid batteries are often used as backup batteries because of their low cost. However, lead-acid batteries are in the under-current cycle in the hybrid power supply system. The main failure mode is sulphation, that is, the lack of charging leads to the agglomeration of lead sulfate formed by the reaction of the active substances in the lead-acid battery, and the formation of large-sized sulfuric acid. The lead is vigilant and does not have chemical activity, resulting in a decrease in battery capacity and an increase in internal resistance.

Summary of the invention

Embodiments of the present invention provide a hybrid power supply device and a hybrid power supply method, which can effectively reduce battery capacity attenuation caused by sulfation.

In a first aspect, an embodiment of the present invention provides a hybrid power supply device, including a main battery module, a backup battery module, a pulse charging module, a control module, a power module, and a load; wherein the power module is configured to supply power to the load The control module is configured to control the main battery module to supply power to the load when the power module stops supplying power, and to control the backup battery when a preset parameter of the main battery module satisfies a first condition The module supplies power to the load; wherein the preset parameter may be a state of charge, a voltage, a current, a health, or other parameters; the control module is further configured to control the power module after the power supply is restored to the load The power module charges and charges the backup battery module, and is configured to control the power module to charge the main battery module when the backup battery module completes the charge charging; the pulse charging module is used in the backup battery During the process of equalizing and charging the module, when the preset parameters of the backup battery module meet the second condition, the backup battery module is Pulse Charging.

In a first possible implementation manner of the first aspect, the pulse charging module is specifically configured to perform power charging from the power module and/or the main battery module to perform pulse charging on the backup battery module.

In a second possible implementation manner of the first aspect, the pulse charging module is further configured to: when the backup battery module performs equalization charging, when detecting that the preset parameter of the backup battery module meets the second condition The backup battery module is pulse charged. The preset parameter may be a state of charge, a voltage, a current, a health, or other parameters.

In a third possible implementation manner of the first aspect, the pulse charging module is further configured to perform pulse charging on the backup battery module while performing equalization charging on the main battery module.

In a fourth possible implementation manner of the first aspect, the pulse charging module is further configured to: when the main battery module supplies power to the load, when detecting that a preset parameter of the main battery module is satisfied In the third condition, the backup battery module is pulse-charged by taking power from the main battery module.

In a second aspect, an embodiment of the present invention provides a hybrid power supply method, where the hybrid power supply method is applied to a hybrid power supply system, where the hybrid power supply system includes a primary battery module, a backup battery module, a control module, and a charging module. The power supply module and the load; the hybrid power supply method includes: when detecting that the power module stops supplying power to the load, controlling the main battery module to supply power to the load; when detecting the pre-expansion of the main battery module When the parameter satisfies the first condition, the backup battery module is controlled to supply power to the load; when detecting that the power module restores power to the load, controlling the power module to charge the backup battery module During the charging and discharging of the backup battery, when it is detected that the preset parameter of the backup battery module satisfies the second condition, the backup battery module is pulse-charged; when the backup battery module is detected to be completed When charging, the power module is controlled to charge the main battery constant current module. The preset parameter may be a state of charge, a voltage, a current, a health, or other parameters.

In a first possible implementation manner of the second aspect, when the backup battery module is pulse-charged, power is taken from the power module and/or the main battery module to the backup battery module. Perform pulse charging.

In a second possible implementation manner of the second aspect, the method further includes: when the backup battery module performs equalization charging, when detecting that the preset parameter of the backup battery module meets the second condition, The pulse charging module pulsates the backup battery module.

In a third possible implementation manner of the second aspect, the method further includes: while charging and charging the main battery module, the pulse charging module performs pulse charging on the backup battery module.

In a fourth possible implementation manner of the second aspect, the method further includes: when the main battery module supplies power to the load, when detecting that the preset parameter of the main battery module meets the third In the condition, the pulse charging module takes power from the main battery module to pulse charge the backup battery module.

It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

In the present invention, after the power module restores the power supply to the load, firstly, the backup battery module is uniformly charged and then the main battery module is uniformly charged and charged, and after the backup battery module completes the equalization charging, the backup battery is continued. The module performs pulse charging to keep the backup battery module floating, greatly shortening the duration of the backup battery module in an under-power state, effectively reducing the capacity attenuation caused by sulfation, realizing online maintenance and repair of the backup battery module, and extending the backup battery. The life of the module, and the way of keeping the backup battery in the floating charge by means of pulse charging has the characteristics of low cost and low energy loss.

DRAWINGS

1 is a schematic structural view of an embodiment of a hybrid power supply device according to the present invention;

2 is a schematic flow chart of another embodiment of a hybrid power supply device according to the present invention;

3 is a schematic flow chart of an embodiment of a hybrid power supply method according to the present invention;

4 is a schematic flow chart of another embodiment of a hybrid power supply method of the present invention.

detailed description

As shown in FIG. 1, FIG. 1 is a schematic structural view of an embodiment of a hybrid power supply device according to the present invention. The hybrid power supply device includes a main battery module 11, a backup battery module 12, a pulse charging module 13, a control module 14, a power module 15, and a load 16.

In an optional embodiment of the power module 15, the power module 15 includes an AC input module and a rectifier module, wherein the AC input module is configured to receive AC mains power and output AC power, and the rectification module is configured to rectify AC power output by the AC input module. , output high voltage rectification.

In an optional embodiment of the AC input module, the AC input module includes an electromagnetic interference (English: Electromagnetic Interference, EMI) filter and an air switch; The EMI filter is used to EMI filter the input AC mains to output a pure AC power. The air switch is used to short circuit, severely overload and undervoltage protection.

In another alternative embodiment of the power module 15, the power module 15 includes a solar generator set or an oil generator set, which is not limited herein.

In the hybrid power supply device of the present embodiment, one end of the power module 15 is connected to the load 16, and the other end is connected to the control module 14, and one end of the main battery module 11 and one end of the backup battery module 12 are respectively connected to one end of the load 16. The control module 14 is specifically configured to be connected to one of the primary battery module 11 and the backup battery module 12 to form a loop with the control module 14 and the load 16.

When the power module 15 is in normal operation, the control module 14 is in a connected state with the main battery module 11 or the backup battery module 12, and the power module 15 is used to supply power to the load 16 and to charge the battery module connected to the control module 14. However, the power module 15 may be in a fault condition or other conditions that may render the load 16 unpowered. To ensure the normal operation of the load 16, when the control module 14 detects that the power module 15 stops supplying power to the load 16, the selection is connected to the main battery module 11 so that the main battery module 11, the control module 14 and the load 16 form a loop. Further, the main battery module 11 supplies power to the load 16.

The power module 14 or the pulse charging module 13 is also used to monitor the preset parameters of the main battery module 11 in real time. In this embodiment, the preset parameter may be a state of charge (English: State of Charge, SOC), voltage, current, health (English: Section Of Health, abbreviation: SOH) or other battery related parameters, here No restrictions. When the preset parameter of the main battery module 11 satisfies the first condition, the control module 14 selects to be connected to the backup battery module 12, that is, the main battery module 11 is cut out of the circuit, and the backup battery module 12 is connected to the circuit. So that the backup battery module 12 continues to supply power to the load.

For example, if the preset parameter of the main battery module 11 is SOC, then when the preset parameter of the main battery module 11 is less than the first preset value, it is determined that the main battery module 11 satisfies the first condition.

Optionally, in this embodiment, the control module 14 specifically includes a DC switch (English: Direct Current Transform Switch, DTS) for selecting whether to connect the primary battery module 11 or the backup battery module 12 to the loop.

Optionally, in this embodiment, the power module 15 or the pulse charging module 13 includes a monitoring unit (FIG. Not shown), used to monitor the preset parameters of the main battery module and the backup battery module in real time. In this embodiment, the preset parameters of the main battery module and the preset parameters of the backup battery module may be the same parameter or different parameters, which are not limited herein.

After the power module 15 resumes power supply, the control module 14 is further configured to perform equalization charging on the backup battery module after the power module resumes power supply, and to perform the equalization charging after the backup battery module completes the equalization charging The main battery module performs equalization charging.

Specifically, after the power module 15 resumes power supply, the control module 14 is configured to connect the power module 15 into the loop formed by the control module 14, the load 16 and the backup battery module 12, so that the power module 15 can simultaneously supply the load 16 The power is supplied and the backup battery module 12 is charged. After the backup battery module 12 completes the equalization charging, the control module 14 selectively selects to be connected to the main battery module 11, so that the power module 15 performs equalization charging on the main battery module.

Wherein, the standby battery module completes the charging and charging means that the backup battery module is in a fully charged state. Alternatively, since the backup battery module is charged to a late stage and the current is small, and the main battery module 11 is in an under-power state, the backup battery module may also be charged that the backup battery module is not fully charged and the power reaches a predetermined value. This can improve the charging efficiency.

In this embodiment, the pulse charging module 13 is used to connect the main battery module 11 and the backup battery module 12. When the backup battery module 12 is fully charged, when the preset parameter of the backup battery module 12 satisfies the second condition, the pulse charging module 13 is configured to obtain power from the main battery module 11 and convert the electric energy through the circuit. The pulsed waveform is pulsed to the backup battery module 12.

For example, if the preset parameter of the backup battery module 12 is SOC, then when the preset parameter of the backup battery module 11 is not less than the second preset value, it is determined that the backup battery module 12 satisfies the second condition.

Specifically, when the battery module 12 is pulse-charged, the pulse charging module 13 may perform continuous pulse on the backup battery module 12, or periodically charge, or charge within a preset time period, which is not limited herein. Specifically, the pulse charging module 13 performs pulse charging on the backup battery module 12 by combining positive and negative pulses.

Optionally, in this embodiment, the main battery module 11 includes a lithium ion battery. Due to the long cycle life of lithium-ion batteries, the use of lithium-ion batteries can reduce replacement and maintenance costs. Optionally, in this embodiment, the backup battery module 12 includes a lead-acid battery. Lead-acid batteries are low cost and can drop Low battery cost. Of course, the above is only an example and is not limiting.

In this embodiment, after the power module resumes power supply to the load, firstly, the backup battery module is uniformly charged and then the main battery module is uniformly charged and charged, and after the backup battery module completes the equalization charging, the standby is continued. The battery module performs pulse charging to keep the backup battery module floating, greatly shortening the duration of the backup battery module in an under-power state, effectively reducing the capacity attenuation caused by sulfation, realizing online maintenance and repair of the backup battery module, and extending the standby. The life of the battery module, and the manner in which the backup battery is kept floating by means of pulse charging has the characteristics of low cost and low energy loss.

Optionally, in this embodiment, the pulse charging module 13 is further configured to: when the backup battery module 12 performs the equalization charging, when the preset parameter of the backup battery module 12 is detected to satisfy the second condition, the backup battery module 12 pulse charging. Thus, by extending the pulse action time, the backup battery module can be maintained in a better state.

Optionally, in this embodiment, the pulse charging module 13 is further configured to perform pulse charging on the backup battery module 13 while performing equalization charging on the main battery module 12. Thus, by extending the pulse action time, the backup battery module 13 can be maintained in a better state.

Optionally, in this embodiment, the pulse charging module 13 is further configured to: when the main battery module 12 supplies power to the load 16, when detecting that the preset parameter of the main battery module 11 meets the third condition, from the main The battery module 12 is powered to charge the backup battery module 12. Thus, by extending the pulse action time, the backup battery module 13 can be maintained in a better state.

For example, if the preset parameter of the backup battery module 12 is SOC, then when the preset parameter of the backup battery module 11 is not less than the third preset value, it is determined that the backup battery module 12 satisfies the third condition. It should be noted that, in practical applications, the preset parameters used by the backup battery module to determine whether the third condition is met may be the same as the preset parameters used to determine whether the second condition is met, or may be different, and are not limited herein. .

In this embodiment, the pulse charging module obtains electrical energy from the main battery module to pulse charge the backup battery module. Optionally, the pulse charging module can also obtain power from the power module to pulse charge the backup battery module.

For example, as shown in FIG. 2, FIG. 2 is a schematic structural view of another embodiment of the hybrid power supply device of the present invention. Different from the embodiment shown in FIG. 1 , one end of the pulse charging module 13 and the backup battery The module 12 is connected, and the other end is not connected to the main battery module 11, but is connected to the power module 15.

Further, preferably, one end of the pulse charging module is connected to the backup battery, and the other end is connected to the main battery module and connected to the power module. In this way, the pulse charging module can simultaneously charge the power module and the main battery module to pulse charge the backup battery module.

Of course, there are other circuit structures that enable the pulse charging module to obtain power from the power module to pulse charge the backup battery module, which is not limited herein.

The hybrid power supply device of the present invention has been described above, and the hybrid power supply method of the present invention will be described below.

As shown in FIG. 3, FIG. 3 is a schematic flow chart of an embodiment of a hybrid power supply method according to the present invention. In this embodiment, the hybrid power supply method is applied to a hybrid power supply system, wherein the hybrid power supply system includes a main battery module, a backup battery module, a control module, a charging module, a power module, and a load and hybrid power supply method, including:

301. When detecting that the power module stops supplying power to the load, control the main battery module to supply power to the load.

In this embodiment, when the power module is working normally, the power module is used to supply power to the load to ensure normal operation of the load. When the control module detects that the power module stops supplying power to the load, the main battery module and the load are connected so that the main battery module supplies power to the load.

302. When it is detected that the preset parameter of the primary battery module meets the first condition, the backup battery module is controlled to supply power to the load.

Before the power module returns to normal power supply, the main battery module remains connected to the load to supply power to the load. When the control module detects that the preset parameter of the main battery module is lowered to the first preset value, disconnect the main battery module from the load, and connect the backup battery module and the load, so that the backup battery module supplies power to the load. For the explanation of the preset parameters and the first condition, reference may be made to the explanation of the preset parameters and the first condition in the embodiment shown in FIG. 1 , and details are not described herein again.

303. When detecting that the power module restores power to the load, control the power module to charge the backup battery module.

Specifically, when the control module detects that the power module resumes power supply to the load, the backup battery module is used. The block is connected to the circuit in which the power module and the load are located, so that the power module charges and charges the backup battery module.

304. When it is detected that the preset parameter of the backup battery module meets the second condition, the backup battery module is pulse-charged.

The pulse charging module monitors the preset parameters of the backup battery module. During the process of equalizing and charging the backup battery module, when the pulse charging module detects that the preset parameter of the backup battery module meets the second condition, the backup battery module and the power module are connected to take power from the power module to the backup battery. The module performs pulse charging, or connects the backup battery module and the main battery module to take power from the main battery module to pulse charge the backup battery module. Of course, the pulse charging module can also connect the backup battery module to the power module and the main battery module at the same time to simultaneously charge the power module and the main battery module to pulse charge the backup battery module.

For an explanation of the preset parameters and the second condition, reference may be made to the explanation of the preset parameters and the second condition in the embodiment shown in FIG. 1, and details are not described herein again.

Optionally, in this embodiment, the pulse charging of the backup battery module by the pulse charging module includes positive and negative pulse combined charging, and is not limited herein.

In practical applications, the backup battery may be in an uncharged state when the preset parameters of the backup battery module satisfy the second condition. It should be noted that when the backup battery module performs pulse charging, the backup battery module can stop charging and charging, and can continue to charge and charge, and no limitation is imposed here.

305. When detecting that the backup battery module completes the equalization charging, control the power module to charge and charge the main battery module.

Specifically, when the backup battery module is in a fully charged state, the constant current-constant voltage charging is completed, and then the control module disconnects the backup battery module from the power module, and connects the main battery module and the power module, and the main battery module is connected. Connect to the loop where the power module and load are located, so that the power module charges and charges the main battery module.

Optionally, the backup battery module may also perform equalization charging when the battery module is not fully charged. Since the backup battery module has a small current in the later stage of charging, the charging of the main battery module may be started in advance to improve the charging efficiency.

Optionally, when the backup battery module performs equalization charging, when the preset parameter of the backup battery module is detected to satisfy the second condition, the pulse charging module further performs pulse charging on the backup battery module.

Optionally, while the main battery module is being charged and charged, the pulse charging module performs pulse charging on the backup battery module.

Optionally, when the primary battery module supplies power to the load, when detecting that the preset parameter of the primary battery module meets a third condition, the pulse charging module takes power from the primary battery module. The backup battery module is pulsed. For the explanation of the preset parameters and the third condition, reference may be made to the explanation of the preset parameters and the third condition in the embodiment shown in FIG. 1 , and details are not described herein again.

For descriptions of the modules in the hybrid power supply device in this embodiment, reference may be made to the description in the embodiment shown in FIG. 1 , and details are not described herein again.

To understand the present invention, the hybrid power supply method of the present invention will be specifically described below in conjunction with a specific application scenario. Referring to FIG. 4, FIG. 4 is a schematic flow chart of another embodiment of a hybrid power supply method according to the present invention.

When the mains supply is stopped, the control module in the hybrid power supply unit connects the main battery module and the load so that the main battery module discharges the load. When it is detected that the SOC of the main battery module is less than 20%, the control module connects the backup battery module and the load so that the backup battery module is placed on the load.

During the process of discharging the load by the main battery module, when the pulse charging module detects that the SOC of the main battery is in a state higher than 80%, the main battery module and the backup battery module are connected to the main battery module. Take power and pulse charge the backup battery module.

When the utility power resumes power supply, the control module connects the backup battery module and the power module, so that the power module charges and charges the backup battery module.

In the process of charging and charging the backup battery, when the pulse charging module detects that the SOC of the backup battery is higher than 10%, connect the power module and/or the main battery module and the backup battery module to the slave power module and/or the main battery. The battery module is powered and the battery module is pulsed.

When the control module detects that the backup battery completes the charging and charging, disconnects the backup battery module and the power module, and connects the main battery module and the power module, so that the power module charges the main battery module.

During the charging process of the main battery, the pulse charging module also maintains the connection between the power module and/or the main battery module and the backup battery module to take power from the power module and/or the main battery module, and to the backup battery module. Perform pulse charging.

A person skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit is implemented in the form of a software functional unit and sold as a standalone product Or when used, it can be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention, which is essential or contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents of the technical solutions of the embodiments of the present invention.

Claims

A hybrid power supply device, comprising: a main battery module, a backup battery module, a pulse charging module, a control module, a power module, and a load;

The power module is configured to supply power to the load;

The control module is configured to control the main battery module to supply power to the load when the power module stops supplying power, and to control the standby when a preset parameter of the main battery module satisfies a first condition a battery module supplies power to the load;

The control module is further configured to control the power module to charge and charge the backup battery module after the power module restores power to the load, and to control when the backup battery module completes the equalization charging The power module charges and charges the main battery module;

The pulse charging module is configured to pulse charge the backup battery module when a preset parameter of the backup battery module meets a second condition.
The hybrid power supply device according to claim 1, wherein the pulse charging module is specifically configured to receive power from the power module and/or the main battery module to pulse charge the backup battery module. .
The hybrid power supply device according to claim 1, wherein the pulse charging module is further configured to: when the backup battery module performs equalization charging, when detecting that the preset parameter of the backup battery module meets the second The backup battery module is pulse-charged under conditions.
The hybrid power supply device according to claim 1, wherein the pulse charging module is further configured to pulse charge the backup battery module while performing equalization charging on the main battery module.
The hybrid power supply device according to claim 1, wherein the pulse charging module is further configured to detect a preset parameter of the main battery module when the main battery module supplies power to the load. When the third condition is satisfied, power is taken from the main battery module to pulse charge the backup battery module.
A hybrid power supply method, characterized in that the hybrid power supply method is applied to a hybrid power supply system, wherein the hybrid power supply system includes a main battery module, a backup battery module, a control module, a charging module, a power module, and a load The hybrid power supply method includes:

Controlling the main battery module to supply power to the load when detecting that the power module stops supplying power to the load;

When detecting that the preset parameter of the main battery module meets the first condition, controlling the backup battery module to supply power to the load;

When detecting that the power module restores power to the load, controlling the power module to charge the backup battery module;

When it is detected that the preset parameter of the backup battery module meets the second condition, performing pulse charging on the backup battery module;

When it is detected that the backup battery module completes the equalization charging, the power module is controlled to charge the main battery constant current module.
The hybrid power supply method according to claim 6, wherein the stepping the battery module to perform the pulse charging comprises:

The backup battery module is pulsed by taking power from the power module and/or the main battery module.
The method of hybrid power supply according to claim 6, wherein the method further comprises:

When the backup battery module performs equalization charging, when it is detected that the preset parameter of the backup battery module meets the second condition, the pulse charging module performs pulse charging on the backup battery module.
The method of hybrid power supply according to claim 6, wherein the method further comprises:

While charging and charging the main battery module, the pulse charging module performs pulse charging on the backup battery module.
The method of hybrid power supply according to claim 6, wherein the method further comprises:

When the primary battery module supplies power to the load, when it is detected that the preset parameter of the primary battery module meets the third condition, the pulse charging module takes power from the primary battery module to the standby The battery module is pulsed.