TW201442392A - Power supplier preventing battery module from excessively discharging - Google Patents

Abstract

A power supplier preventing battery module from excessively discharging is applied to a power supplier having a main power supply system and a backup power supply system. The present invention uses a battery protection module to normally detect the state of a battery module in the backup power supply system. The battery protection module includes a starting path connected to the main power supply system to receive the standing power, and a battery detection path connected to the battery module and receiving a micro-current outputted by the battery module to generate a protection starting signal when the battery module is at a state to be charged, and a protection starting path connected to a switching unit in a backup power supply system and receiving the protection starting signal to allow the switching unit to access a cut-off state.

Description

Power supply to avoid over-discharging of battery modules

The invention relates to a power supply, in particular to a power supply with a battery protection module to avoid over-discharging of the battery module.

Large information devices such as servers or databases are often used in the industry today to provide backup power supplies to provide stable power for long-term operation of the server or database. A backup power supply device, as disclosed in U.S. Patent No. 7,495,415, the backup power supply includes a main power supply module and a backup power module. In the normal state, the main power supply module receives an external power supply. Converting and outputting a working power, the backup power module is generally a battery or a capacitor, and the backup power module receives the working power from the main power supply module, and stores the converted power into a backup power.

When the main power supply module cannot obtain the external power normally, the main power supply module cannot supply the working power normally, and the power level of the working power is lower than the backup power, and the backup power module is outputted immediately. The backup power continues to supply the working power for a period of time. However, the amount of the backup power module to store the backup power depends on the capacity of the backup power module, that is, when the backup power is also exhausted, when the backup power module is redox-reacted When the balance is reached, the backup power is exhausted. At this time, although the backup power module cannot provide the backup power, the backup power module is still connected with other related circuits, so that the backup power module still outputs a micro current, and then enters a deep discharge state. However, deep discharge is not conducive to the backup power module, which will lead to a reduction in the life of the backup power module.

Although most of the backup power supply devices today have a backup power detection module, the storage state or output state of the backup power is constantly monitored. However, due to the relationship between the design structure and the detection sampling, the conventional backup power detection module generally detects only a large discharge current of the amperage, and the micro current outputted by the backup power module into the deep discharge is generally regarded as The noise is further prevented, and the backup power module cannot be prevented from entering a deep discharge state, so that the life of the backup power module is usually not long.

The main purpose of the present invention is to solve the problem that the conventional power supply can not avoid the battery module entering the deep discharge and losing its service life to avoid excessive discharge of the battery module.

To achieve the above objective, the present invention provides a power supply for avoiding excessive discharge of a battery module, comprising a main power supply system, a backup power supply system, a power supply switching module, and a battery protection module. The main power supply system is connected to an external power conversion output to output at least one working power and a standing power. The backup power supply system is connected to the main power supply system to receive the working power, and comprises a battery module and a battery module connected to the battery module. a switching unit in an on state and an off state, wherein the battery unit has a charging state that is charged by the operating power and is dumped as a backup power when the switching unit is in the conducting state, and outputs the device with a discharging current a discharge state of the auxiliary power, and a redox reaction of the battery module reaches a balance after the discharge state continues for a discharge time, and outputs the standby power to output a micro current to be charged, and the switching unit is in the off state The battery module has a shutdown state in which the operation power is stopped and the backup power is output. The power switching module is respectively connected to the main power supply system and the backup power supply system to receive the working power, the standing power and the backup power, and has a working power higher than the backup power to output the working power. And a first power supply state, and a second power supply state in which the backup power is lower than the backup power. The battery protection module includes a start path connecting the main power supply system to receive the standby power, a battery detection path connected to the battery module to receive the micro current to generate a protection start signal, and a battery detection path. The switching unit connects and accepts the protection start signal to cause the switching unit to enter the protection start path of the off state.

In an embodiment, the main power supply system includes a rectifying and filtering unit that receives the external power, a power factor correcting unit connected to the rectifying and filtering unit, a transformer, a pulse width control unit, a switching component, and a power regulating module. group.

In an embodiment, the power supply further includes a power adjustment module that is connected to the power switching module to receive the working power, the standby power, and the backup power, and converts the working power or the backup power. .

In one embodiment, the battery protection module is a microcontroller.

In one embodiment, the main power supply system includes a charging control unit that connects the switching unit and receives the operating power to charge the battery module when the switching unit is in the conducting state and the battery module is in the charging state.

In an embodiment, the backup power supply system includes a connection switch unit that receives the working power from the main power supply system, and the battery module is charged in the charging state when the battery module is in the charging state. Charge control unit.

Compared with the conventional power supply, the battery protection module of the present invention receives the micro current generated by the battery module in the state to be charged, and generates a protection start signal according to the micro current, so that the battery module enters The shutdown state solves the problem that the conventional power supply has a battery state detection module, but the battery state detection module treats the micro current as noise or does not detect, so that the battery module is easy to enter excessive discharge. , resulting in a shorter life of the battery module.

1. . . Main power supply system

11. . . Rectifier filter unit

12. . . Power factor correction unit

13. . . transformer

14. . . Pulse width control unit

15. . . Switching element

16. . . Charging control unit

2. . . Backup power supply system

twenty one. . . Battery module

twenty two. . . Switching unit

twenty three. . . Charging control unit

3. . . Power supply switching module

4. . . Battery protection module

41. . . Battery detection path

42. . . Protection boot path

43. . . Startup path

5. . . Power regulation module

100. . . Power Supplier

200. . . External power source

FIG. 1 is a schematic diagram showing the unit composition of an embodiment of a power supply device for avoiding excessive discharge of a battery module according to the present invention.

2 is a schematic diagram showing the unit composition of an embodiment of a power supply device for avoiding excessive discharge of a battery module according to the present invention (2).

The detailed description and technical contents of the present invention will now be described as follows:

Referring to FIG. 1 , as shown in the figure, the power supply of the present invention for avoiding excessive discharge of the battery module can provide a backup power to maintain the power supply of the power supply when an external power source 200 cannot supply power normally. At the time, the power supply 100 can be a redundant power supply system (Redundant Power Supply). The power supply 100 includes a main power supply system 1, a backup power supply system 2, a power supply switching module 3, and a battery protection module 4. The main power supply system 1 receives an external power conversion and outputs at least one working power and one standing power. Specifically, the main power supply system 1 includes a rectifying and filtering unit 11 that receives the external power, and a power factor connected to the rectifying and filtering unit 11. The correction unit 12, a transformer 13, a pulse width control unit 14, and a switching element 15. After the external power is rectified and filtered by the rectifying and filtering unit 11, the power factor correction unit 12 adjusts the power factor of the external power by a variable voltage adjustment level, and the pulse width control unit 14 outputs a driving signal to determine the switching element. During the duty cycle of 15, the coil current of the transformer 13 is periodically turned on and off by the switching element 15, and finally the operating power and the standing power are output.

On the other hand, the backup power supply system 2 is connected to the main power supply system 1 to receive the working power, and includes a battery module 21 and a switching unit 22 connected to the battery module 21 having an on state and an off state. The unit 22 can be an electronic switch. When the switching unit 22 is in the conducting state, the battery module 21 has a charging state for charging and storing the working power as a backup power, and outputting the device with a discharging current. a discharge state of the auxiliary power, and a state in which the redox reaction of the battery module 21 reaches a balance after the discharge state continues for one discharge time, and outputs the standby power to output a micro current to be charged, and the switching unit 22 is In the off state, the battery module 21 has a shutdown state in which the operating power is stopped and the backup power is output. The power supply switching module 3 is connected to the main power supply system 1 and the backup power supply system 2 to receive the working power, the standby power and the backup power, and has a working power higher than the backup power. a first power supply state that is outputted by the operating power, and a second power supply state that is outputted by the backup power when the operating power is lower than the backup power. Further, the battery protection module 4 includes a starting path 43 for connecting the main power supply system 1 to receive the standing power, and a battery connected to the battery module 21 to receive the micro current to generate a protection start signal. a detection path 41, and a protection activation path 42 connected to the switching unit 22 and receiving the protection activation signal to cause the switching unit 22 to enter the off state, and the battery protection module 4 may be a microcontroller. .

In addition, the power supply 100 of the present invention may further include a power supply switching module 3 that receives the working power, the standby power, and the backup power, and performs power conversion on the working power or the backup power. The power adjustment module 5 further illustrates that the power supply specification used by the general information device is ATX specification, which needs to output working power of different power levels such as 12V, -12V, 5V, 3.3V, and standby power of 5VSB, and the power adjustment The module 5 can receive the power level or the backup power, and then convert and output the power level to output the respective operating powers under the ATX standard.

Specifically, when the power supply device 100 is activated, the main power supply system 1 receives the external power conversion and outputs the working power and the standby power, and the switching unit 22 is also triggered to be turned into the conductive state. The module 21 receives the working power via the switching unit 22, and enters the charging state to transfer the working power to the backup power. It is assumed that after the power supply 100 fails to obtain the external power normally after a period of time, the power switching module 3 determines that the working power is lower than the backup power, and outputs the backup. The electric power, that is, the battery module 21 enters the discharge state, and the discharge current is output to the power supply switching module 3 via the switching unit 22. When the battery module 21 is discharged through the discharge time, the redox reaction generated in the battery inside the battery reaches equilibrium, and the output of the backup power is stopped, and the discharge state is changed to the state to be charged. Although the backup power cannot be normally outputted in the charging state, the battery module 21 actually outputs the micro current due to the connection of other related circuits, and the micro current is significantly smaller than the discharging current. However, the battery detection path 41 generates the protection start signal after receiving the micro current, and the protection start signal is passed through the protection start path 42 to cause the switching unit 22 to enter an off state, so that the battery module 21 is The state to be charged is switched to the shutdown state, so that the battery module 21 can be prevented from being over-discharged, thereby damaging the service life of the battery module 21. In addition, the battery protection module 4 of the present invention is activated by receiving the standing power, so that the battery protection module 4 can initiate detection in a normal state.

Referring to FIG. 1 , in addition to the above-mentioned structure, the present invention further includes a charging control unit, which can be configured in the main power supply system 1 or the backup power supply system 2 . If the main power supply system 1 is installed, the charging control unit 16 is connected to the switching unit 22 and receives the working power. When the switching unit 22 is in the conducting state and the battery module 21 is in the charging state, the battery module is Group 22 is charged. Referring to FIG. 2, if the charging control unit is disposed in the backup power supply system 2, the charging control unit 23 is also connected to the switching unit 22, and receives the working power from the main power supply system 1, and the switching unit 22 In the on state, the battery module 21 charges the battery module 22 in the charged state.

In summary, the present invention is a power supply for avoiding excessive discharge of a battery module, and is applied to a power supply having a main power supply system and a backup power supply system. The present invention detects the state of a battery module in the backup power supply system in a normal state, and the battery protection module includes a start path connecting the main power supply system to receive the standby power, and a battery module. The group is connected and receives a micro current generated by the battery module to generate a battery detection path for protecting the activation signal when the battery module is in a state of being charged, and is connected to a switching unit in a backup power supply system. And accepting the protection start signal to cause the switching unit to enter a protection start path of an off state. Thereby, the problem that the battery module is often over-discharged and the service life thereof is damaged is avoided.

1. . . Main power supply system

11. . . Rectifier filter unit

12. . . Power factor correction unit

13. . . transformer

14. . . Pulse width control unit

15. . . Switching element

16. . . Charging control unit

2. . . Backup power supply system

twenty one. . . Battery module

twenty two. . . Switching unit

3. . . Power supply switching module

4. . . Battery protection module

41. . . Battery detection path

42. . . Protection boot path

43. . . Startup path

5. . . Power regulation module

100. . . Power Supplier

200. . . External power source

Claims (6)

A power supply for avoiding excessive discharge of a battery module, comprising:
a main power supply system, connected to an external power conversion output of at least one working power and one standing power;
a backup power supply system, connected to the main power supply system to receive the working power, comprising a battery module and a switching unit connected to the battery module having a conducting state and an off state, wherein the switching unit is in the conducting state The module has a charging state that is charged by the working power and is dumped as a backup power, a discharge state in which the backup power is outputted by a discharge current, and a battery mode after the discharge state continues for a discharge time The redox reaction of the group reaches a balance and stops outputting the backup power to output a state of charge to be charged. When the switching unit is in the off state, the battery module has a stop receiving the working power and outputting the backup power. Off state;
a power switching module respectively connected to the main power supply system and the backup power supply system to receive the working power, the standing power and the backup power, and having a working power higher than the backup power to perform the working power a first power supply state of the output, and a second power supply state that outputs the backup power when the working power is lower than the backup power; and a battery protection module includes a connection to the main power supply system to receive the standing a starting path of the power, a battery detecting path connected to the battery module to receive the micro current to generate a protection start signal, and a connection with the switching unit and accepting the protection start signal to cause the switching unit to enter The protection start path for this off state. The power supply device for avoiding over-discharging of the battery module according to claim 1, wherein the main power supply system includes a rectifying and filtering unit that receives the external power, and a power factor correcting unit that is connected to the rectifying and filtering unit. A transformer, a pulse width control unit, and a switching element. The power supply for avoiding over-discharging of the battery module according to the first aspect of the patent application, further comprising: connecting the power switching module to receive the working power, the standing power, and the backup power and the working power or the A power conditioning module that provides backup power for power conversion. The power supply device for avoiding excessive discharge of a battery module according to claim 1, wherein the battery protection module is a microcontroller. The power supply device for avoiding over-discharging of the battery module according to claim 1, wherein the main power supply system includes a battery module connected to the switching unit and receiving the working power in the switching unit in the conducting state. A charging control unit that charges the battery module in the state of charge. The power supply device for avoiding over-discharging of a battery module according to claim 1, wherein the backup power supply system includes a connection switch unit that receives the working power from the main power supply system at the switching unit. And a charging control unit that charges the battery module when the battery module is in the charging state.