CN104423524B - Power supply system - Google Patents

Abstract

The invention discloses a power supply system used in a computer system to provide an operating power required for the operation of an operating module. The power supply system includes a battery module for generating a battery status signal and controlling the power supply according to a power supply. A signal is used to determine whether to output the operating power supply; a start control circuit is used to generate the power control signal according to the battery status signal or the operating power supply, and output it to the battery module; a status detection module is used to use the battery The operating power output by the module is used to detect an operating status of the computer system and generate an operating status signal; and a switch control circuit is used to output the operating power output by the battery module according to the operating status signal. to the operation module.

Description

power supply system

technical field

The present invention relates to a power supply system, especially a power supply system for a computer system, which can start the battery module output power of the computer system without the power of an additional battery.

Background technique

In recent years, computers have become the most important platform for the public to process digital information. In order to meet the needs of consumers, more and more portable computers have emerged, such as notebook computers and tablet computers. Since the portable computer may also need to perform operations without an external power supply, the power supply system of the portable computer includes a battery module to provide power. However, when the portable computer is turned off, the battery module will correspondingly stop outputting power, and in order to keep the Real-Time Clock (RTC) circuit in the portable computer running continuously, there is another battery in the portable computer. Generally also known as the RTC battery, it is used to provide the power required for the operation of the real-time clock circuit, so that the system time of the portable computer can continue to count and keep on time. Furthermore, when the portable computer is turned from the off state to the on state by the user waking up or starting it, the existing power supply system will first provide power to the start-up circuit through the RTC battery, and let the start-up circuit generate a control signal to start The battery module outputs power.

However, when the RTC battery is dead or damaged, the start-up circuit will have no power to operate and cannot generate a control signal to start the output power of the battery module, thereby causing inconvenience that the portable computer cannot operate even though it has the power of the battery module. In view of this, there is a need for improvement in the prior art.

Contents of the invention

Therefore, the present invention provides a power supply system, which can start the battery module of the computer system to output power without using the power of the extra battery.

The present invention discloses a power supply system, which is used in a computer system to provide an operation power required for the operation of an operation module. The power supply system includes a battery module, which is used to generate a battery status signal and control the signal according to a power supply. , to determine whether to output the operating power; a start control circuit, coupled to the battery module, used to generate the power control signal according to the battery status signal or the operating power, and output to the battery module; a state detection module , coupled to the battery module, used to use the operating power output by the battery module to detect an operating state of the computer system, and generate an operating state signal; and a switch control circuit, coupled to the battery module . The state detection module and the operation module are used to output the operation power outputted by the battery module to the operation module according to the operation state signal.

Description of drawings

FIG. 1 is a schematic diagram of a computer system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of another computer system according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an embodiment of the power supply system in FIG. 2 .

Wherein, the reference signs are explained as follows:

10, 20 computer system

100, 200 power supply system

110, 210 start control circuit

112, 212 battery module

114, 214 switch control circuit

116, 216 state detection module

120, 220 voltage regulator module

122, 222 latch circuit module

124, 224 detection circuit module

130, 230 Operational modules

BT operating power

PWR stabilized power supply

DET detection signal

OP operating status signal

STA battery status signal

CON power control signal

CON_B Standby control signal

BT_B Backup Power

240 Alternate start circuit

242 backup battery

D1～D4 Diodes

R1～R4, Ri resistance

C1 capacitor

TR1～TR6 Transistors

VR voltage regulator

NT1, NT2 NOT gate

SP, PP pins

Vi high potential

detailed description

Please refer to FIG. 1 , which is a schematic diagram of a computer system 10 according to an embodiment of the present invention. As shown in FIG. 1 , the computer system 10 is used in computer devices such as computers, notebook computers or tablet computers and includes a power supply system 100 and an operation module 130 . The computer system 10 provides the power required by the operation module 130 through the power supply system 100 , so that the operation module 130 can perform operations such as surfing the Internet, document processing, or playing multimedia. The power supply system 100 includes a startup control circuit 110 , a battery module 112 , a switch control circuit 114 and a state detection module 116 .

The battery module 112 is a circuit module with batteries such as lithium-ion batteries, lithium polymer batteries, or nickel-metal hydride batteries. Its appearance and shape are generally cylindrical and square, and can be installed in the computer device to provide the operating conditions of the computer system 10. required power. In the power supply system 100, the battery module 112 is coupled to the start control circuit 110, the switch control circuit 114 and the state detection module 116. The battery module 112 is started by the start control circuit 110 to output the operating power BT to the switch control circuit 114 and the switch control circuit 114 and the state detection module 116. State detection module 116 . Regarding the operation of the start control circuit 110 to start the battery module 112, the battery module 112 first generates the battery status signal STA to the start control circuit 110, and then the start control circuit 110 generates the battery status signal STA and the operating power BT according to the output of the battery module 112. The power control signal CON is output to the battery module 112 to control the battery module 112 to start and output the operating power BT.

In detail, when the battery module 112 is not installed in the computer device, the battery module 112 will operate in an initial state without outputting the operating power BT (that is, the operating power BT is low potential) and generate a first state (such as high potential) The battery status signal STA. When the battery module 112 is installed in the computer device and coupled to the startup control circuit 110, the startup control circuit 110 receives the battery status signal STA in the first state (that is, high potential), and generates a power control signal CON output indicating startup. to the battery module 112 . When the battery module 112 receives the power supply control signal CON that is shown as being activated, the battery module 112 will be converted to operate in a startup state and output a high-potential operating power BT and generate a second state (such as a low-potential) battery status signal. STA. Finally, under the high-potential operation power BT, the startup control circuit 110 will continuously output the power control signal CON indicating startup, so that the battery module 112 will continue to output the operation power BT. And until the battery module 112 is almost out of power and outputs a low-potential operating power BT, after the start-up control circuit 110 receives the low-potential operating power BT and the battery status signal STA of the second state (such as low potential), it generates a non- The activated power control signal CON is output to the battery module 112 to control the battery module 112 to operate in an initial state. Thus, by starting the operation of the control circuit 110 , the battery module 112 can use its own power source to start up and output the operating power BT.

In addition, the state detection module 116 is coupled to the battery module 112 and the switch control circuit 114 , and the switch control circuit 114 is coupled to the battery module 112 , the state detection module 116 and the operation module 130 . After the battery module 112 outputs the operating power BT, the state detection module 116 uses the operating power BT output by the battery module 112 to detect the operating state of the computer system 10, such as operating voltage, operating current or operating temperature, etc., and generate the operating state The signal OP is used to indicate whether the operation state of the computer system is a normal state or an abnormal state. The state detection module 116 outputs the operation state signal OP to the switch control circuit 114 to control whether the switch control circuit 114 outputs the operation power BT output by the battery module 112 to the operation module 130 . Specifically, when the state detection module 116 detects that the operating voltage, operating current or operating temperature of the computer system 10 does not exceed the corresponding set value, it means that the operating state of the computer system 10 is in a normal state, and the state The detection module 116 generates an operation state signal OP indicating a normal state and outputs it to the switch control circuit 114 to control the switch control circuit 114 to output the operation power BT output by the battery module 112 to the operation module 130 . When the state detection module 116 detects that the operating voltage, operating current or operating temperature of the computer system 10 exceeds the set corresponding set value, it means that the operating state of the computer system 10 is abnormal, and the state detection module 116 An operation state signal OP indicating an abnormal state is generated and output to the switch control circuit 114 to control the switch control circuit 114 not to output the operation power BT output by the battery module 112 to the operation module 130 .

In detail, the status detection module 116 includes a voltage stabilization module 120 , a latch circuit module 122 and a detection circuit module 124 . The voltage stabilizing module 120 is coupled to the battery module 112, the latch circuit module 122 and the detection circuit module 124, which can be a circuit module with a low dropout regulator (Low Dropout Regulator) or a switching regulator (Switch Regulator) circuit modules, etc., the voltage stabilization module 120 receives the operating power BT output by the battery module and converts it into a stable power PWR, which is output to the latch circuit module 122 and the detection circuit module 124 for use. The detection circuit module 124 uses the stable power supply PWR output by the voltage stabilization module 120 to detect the operating voltage, operating current or operating temperature of the computer system 10, and generates a detection signal DET to indicate that the operating state of the computer system 10 is normal or abnormal state. The latch circuit module 122 is coupled to the voltage stabilizing module 120, the detection circuit module 124 and the switch control circuit 114, and uses the stable power PWR output by the voltage stabilizing module 120 to latch the detection output of the detection circuit module 124. The signal DET is generated, and the operation state signal OP is generated and output to the switch control circuit 114 .

The switch control circuit 114 determines whether to output the operating power BT output by the battery module 112 to the operating module 130 according to the received operating state signal OP. When the switch control circuit 114 receives the operation state signal OP indicating a normal state, the switch control circuit 114 outputs the operation power BT output by the battery module 112 to the operation module 130 to provide the operation module 130 with the power required for operation. When the switch control circuit 114 receives the operation state signal OP indicating an abnormal state, the switch control circuit 114 will not output the operation power BT output by the battery module 112 to the operation module 130, so as to protect the computer system 10 from running When the voltage, operating current or operating temperature is too high, the power supply system still outputs power continuously and burns the computer device.

It should be noted that when the detection signal DET generated by the detection circuit module 124 changes frequently between the detection signal DET displayed as a normal state and the detection signal DET displayed as an abnormal state, the latch circuit module 122 It will latch the detection signal DET which shows the abnormal state for the first time, and then generate the operation state signal OP which shows the abnormal state. After that, the operation state signal OP will be fixed and will not change until the stable power supply PWR used by the latch circuit module 122 is at a low potential (that is, the battery module 112 does not output the operation power supply BT), and then it will be latched again for the first time. Displayed as a detection signal DET in an abnormal state.

In addition, when the state detection module 116 has not received the operation power BT output by the battery module 112 to perform the detection operation, the state detection module 116 outputs an operation state signal OP showing an abnormal state until the state detection module When 116 receives the operating power BT output by the battery module 112 and detects that the operating voltage, operating current or operating temperature of the computer system 10 is normal, it will output the operating state signal OP indicating a normal state. Therefore, under the operation state signal OP which initially shows an abnormal state, the switch control circuit 114 will not output the operation power BT output by the battery module 112 to the operation module 130, but will wait until the state detection module 116 detects The switch control circuit 114 will output the operating power BT output by the battery module 112 to the operating module 130 after the computer system 10 generates the operating state signal OP indicating a normal state.

In other words, in the power supply system 100 , the battery module 112 starts the operation of the control circuit 110 through its own power supply, so that the battery module 112 can start the battery module 112 to output the operating power BT without the power of an additional battery. Furthermore, the state detection module 116 and the switch control circuit 114 can detect whether the computer system 10 has abnormal operating states such as overvoltage, overcurrent or overtemperature after the battery module 112 outputs the operating power BT, and then It is determined whether to output the operating power BT to the operating module 130, thereby protecting the computer system 10 from being burned and damaged.

Please refer to FIG. 2 , which is a schematic diagram of another computer system 20 according to an embodiment of the present invention. As shown in FIG. 2 , the computer system 20 includes a power supply system 200 and an operation module 230 . The computer system 20 is used in computer devices such as computers, notebook computers, or tablet computers. The power supply system 200 provides the power required for the operation of the operation module 230, so that the operation module 230 can perform related tasks such as surfing the Internet, document processing, or playing multimedia. operate. The power supply system 200 includes a backup startup circuit 240 , a backup battery 242 , a startup control circuit 210 , a battery module 212 , a switch control circuit 214 and a state detection module 216 .

The coupling relationship and operation of the start control circuit 210, the battery module 212, the switch control circuit 214 and the state detection module 216 are similar to the start control circuit 110, the battery module 112, the switch control circuit 114 and the state detection module 100 of the power supply system 100. The test module 116 can be referred to above and will not be repeated here. The main difference between the power supply system 200 and the power supply system 100 is that the power supply system 200 further combines a backup starting circuit 240 and a backup battery 242 . The backup battery 242 is an alkaline battery, mercury battery and other batteries and outputs a backup power BT_B, which can be regarded as the RTC battery of the computer system 20, and is used to provide power for the operation of the real-time clock circuit, so that the computer system 20 can continue to count and keep on time . The backup starting circuit 240 is coupled to the backup battery 242, the detection circuit module 224 and the battery module 212. The backup starting circuit 240 can generate a backup control signal CON_B according to the backup power supply BT_B and the detection signal DET output by the detection circuit module 224 and output to the battery module 212 to enable the battery module 212 to output the operating power BT.

In addition, compared with the voltage stabilizing module 120, the voltage stabilizing module 220 is coupled to the battery module 112 and the backup battery 242, and can simultaneously receive the operating power BT of the battery module 112 and the backup power BT_B output by the backup battery 242 for conversion into Stabilize power supply PWR. Wherein, the voltage stabilizing module 220 converts the standby power BT_B into the stable power PWR when the operating power BT is at a low potential, and converts the operating power BT into the stable power PWR when the operating power BT is at a high potential.

Specifically, the battery module 212 determines whether to output the operating power BT through the power control signal CON of the startup control circuit 110 as described above, and the battery module 212 also determines whether to output the operating power BT according to the backup control signal CON_B of the backup startup circuit 240. Output operation power BT. Assuming that the backup battery 242 has no power or is damaged so that the output backup power BT_B is below the low potential, the backup startup circuit 240 will not generate the backup control signal CON_B. It is determined whether to output the operating power BT. In this case, the operation of the power supply system 200 is the same as that of the power supply system 100 , which can be referred to above and will not be repeated here.

Assuming that the backup battery 242 has power and outputs a high-potential backup power BT_B, when the battery module 112 has not output the operating power BT, the voltage stabilizing module 220 will first convert the backup power BT_B to a stable power PWR to provide power for the detection The circuit module 224 detects the operating voltage, operating current or operating temperature of the computer system, and generates a detection signal DET. Next, when the backup power source BT_B is at a high potential and the detection signal DET shows a normal state, the backup startup circuit 240 generates a backup control signal CON_B indicating startup and outputs it to the battery module 212 to control the battery module to operate in the startup state and output Operating power BT. In addition, when the backup power source BT_B is at a low potential or the detection signal DET shows an abnormal state, the backup activation circuit 240 generates a backup control signal CON_B that is not activated and outputs it to the battery module 212 to control the battery module to operate in the initial state. The operating power BT is not output.

To put it simply, in the power supply system 200 , the battery module 212 can be started by the operation of the backup battery 242 and the backup startup circuit 240 when the backup battery 242 is not damaged and has power. Moreover, the battery module 212 can also be started by combining its own power supply with the operation of the start control circuit 210 when the backup battery 242 is damaged or has no power supply. In addition, the backup starting circuit 240 starts the battery module 212 only when the detection signal DET shows that it is in a normal state, which can further protect the computer system 20 from being damaged due to burning.

The implementation of the power supply systems 100 and 200 is not limited to specific devices or components, and can be implemented by related components according to requirements. For example, please refer to FIG. 3 , which is a schematic diagram of an embodiment of the power supply system 200 in FIG. 2 . Specifically, the battery module 212 has pins SP and PP, the pin SP is connected in series with the resistor Ri inside the battery module 212 and connected to the high potential Vi, and the pin PP is used to output the operating power BT. When the battery module 212 is not connected to any circuit, the pin SP is at a high potential because it is connected in series with the resistor Ri to the high potential Vi. In this case, the battery module 212 will not output the operating power BT. The battery module 212 needs to connect the outside of the pin SP to the ground through a circuit so that the pin SP is at a low potential, then the battery module 212 will start and output the operating power BT through the pin PP.

Therefore, in the power supply system 200 , the pin SP of the battery module 212 is coupled to the startup control circuit 210 and the backup startup circuit 240 . The startup control circuit 210 includes diodes D1, D2, resistor R1, capacitor C1 and transistor TR1, and the backup startup circuit 240 includes transistors TR3, TR4. Transistors TR1, TR3, and TR4 are N-type metal oxide semiconductor (MOS) transistors, including source, drain, and gate, but transistors TR1, TR3, and TR4 can also be bipolar junction transistors (bipolar junction transistor, BJT) and other transistors are not limited.

First, assuming that the backup battery 242 does not have a power source or is damaged so that the output backup power BT_B is below the low potential, since the gate of the transistor TR4 is connected to the backup battery 242 and receives the low potential backup power BT_B and the source of the transistor TR4 Connected to the ground terminal, so the voltage between the gate and the source of the transistor TR4 is not greater than the forward bias voltage so that the transistor TR4 is turned off and will not be turned on, so that the pin SP of the battery module 212 cannot be connected to the Therefore, the battery module 212 cannot be activated to output the operating power BT. The pin SP of the battery module 212 is further connected to the diode D1 of the starting control circuit 210 , and the diode D1 is connected in series with the resistor R1 and the capacitor C1 and connected to the ground terminal. Since the pin SP is connected in series with the resistor Ri inside the battery module 212 and connected to the high potential Vi, the pin SP is at a high potential and generates current through the diode D1 and the resistor R1 to charge the capacitor C1. When the voltage across the capacitor C1 is greater than the forward bias voltage between the gate and source of the transistor TR1, the transistor TR1 will be turned on, so that the pin SP of the battery module 212 will be connected to the ground terminal through the transistor TR1 to start the battery The module 212 outputs the operating power BT, and makes the pin SP of the battery module 212 turn to a low potential. In addition, since the diode D2 is connected between the pin PP and the capacitor C1, when the battery module 212 outputs a high-potential operating power BT through the pin PP, the high-potential operating power BT will continue to charge the capacitor C1 through the diode D2. So that the voltage at both ends of the capacitor C1 can still turn on the transistor TR1 after the pin SP turns to a low potential, so that the pin SP is continuously grounded, so as to continuously start the battery module 212 to output the operating power BT.

Furthermore, the voltage stabilizing module 220 includes a voltage regulator VR, a transistor TR2, a resistor R2 and diodes D3 and D4. The transistor TR2 is a P-type metal-oxide-semiconductor transistor and includes a source, a drain, and a gate. The transistor TR2 can also be a bipolar junction transistor and other transistors without limitation. When the battery module 212 starts to output the operating power BT through the pin PP, the voltage regulator VR is connected to the pin PP to receive the operating power BT output by the battery module 212 and convert it into a power supply with a relatively stable voltage and output it to the diode D3 . At the same time, the resistor R2 and the gate of the transistor TR2 are also connected to the pin PP. When the operating power BT is at a high potential and the backup power BT_B is at a low potential, the voltage between the gate and the source of the transistor TR2 will be smaller than the forward bias voltage so that transistor TR2 is off and will not conduct. In this way, the stable power PWR is output by the diode D3 connected to the voltage regulator VR, that is, the stable power PWR is generated by the conversion of the operating power BT by the voltage regulator VR and has a relatively stable voltage.

The detection circuit module 224 is connected between the diodes D3 and D4 and can use the stable power supply PWR output by the voltage stabilization module 220 to detect the operating voltage, operating current or operating temperature of the computer system 20 to generate high potential detection The signal DET indicates that the operating state of the computer system 20 is normal, or generates a detection signal DET of low potential to indicate that the operating state of the computer system 20 is abnormal, and outputs the detection signal DET to the latch circuit module 224 .

The latch circuit module 224 includes NOT gates NT1, NT2 and a resistor R3. The NOT gates NT1 and NT2 are logic gate circuits, which use the stable power supply PWR output by the voltage stabilizing module 220 to operate, and will invert the input signal at the input terminal and output a signal inverting the input signal at the output terminal, such as when the input When the signal is at a low potential, a high potential signal will be generated after passing through the NOT gate NT1 or the NOT gate NT2. The output terminal of the NOT gate NT1 is connected to the input terminal of the NOT gate NT2 and the input terminal of the NOT gate NT1 is connected to the output terminal of the NOT gate NT2 to form a loop to form a latch circuit. Wherein, the resistor R3 is connected between the output terminal of the NOT gate NT1 and the input terminal of the NOT gate NT2.

The input terminal of the NOT gate NT1 is connected to the detection circuit module 224 to receive the detection signal DET. When the detection signal DET is at a high potential to show that the operating state of the computer system 20 is normal, the NOT gate NT1 will reverse the detection signal DET. After the phase, the output terminal outputs a low-potential signal to the input terminal of the NOT gate NT2, so that there will be no voltage drop across the resistor R3. At the same time, the NOT gate NT2 inverts the low-potential signal and outputs a high-potential signal at the output terminal. Operation status signal OP. When the detection signal DET is low to indicate that the operating state of the computer system 20 is abnormal, the NOT gate NT1 inverts the detection signal DET and outputs a high potential signal at the output terminal to the input terminal of the NOT gate NT2, and The two ends of the resistor R3 will have a voltage, and at the same time, the NOT gate NT2 will invert the high potential signal and then output the low potential operation status signal OP at the output terminal. Once the detection signal DET sent by the detection circuit module 224 is at a low level, no matter whether the computer system 20 has recovered or not, the detection signal DET will maintain the low level. Only when the stable power supply PWR power used by the NOT gates NT1 and NT2 disappears and becomes a low potential and then re-outputs a high potential, the latch circuit will re-latch the low potential detection signal DET to be a low potential operating status signal OP.

The switch control circuit 214 includes transistors TR5 , TR6 and a resistor R4 . Transistor TR5 is a P-type metal-oxide-semiconductor transistor, transistor TR6 is an N-type metal-oxide-semiconductor transistor, and transistors TR5 and TR6 include a source, a drain and a gate, and transistors TR5 and TR6 can also be bipolar junction transistors, etc. Transistors are not limited.

When the battery module 212 has not output the operating power BT at the beginning, the synchronous voltage stabilizing module 220 cannot output the stable power PWR to the detection circuit module 224 and the latch circuit module 224 to perform operation, so there is no operating power BT, the detection The detection signal DET output by the circuit module 224 is low potential and the operation status signal OP output by the latch circuit module 224 is also low potential. When the operation status signal OP is low potential, the gate of the transistor TR6 is connected to the latch circuit module 224 to receive the low potential operation status signal OP and the source of the transistor TR6 is connected to the ground terminal, and the gate and source of the transistor TR6 The voltage between them is less than the forward bias voltage so that the transistor TR6 is turned off and will not be turned on. At the same time, when the transistor TR6 is turned off, the operating power BT output through the pin PP cannot be connected to the ground terminal through the resistor R4 connected in series, so that there is no voltage at both ends of the resistor R4, and the gate and source of the transistor TR5 If the voltage is less than the forward bias voltage, the transistor TR5 will be turned off and will not be turned on. Therefore, when the transistor TR5 is turned off, the switch control circuit 214 will not output the operating power BT to the operating module 230 .

After the battery module 212 starts to output the operating power BT, the voltage stabilizing module 220 can output the stable power PWR to the detection circuit module 224 and the latch circuit module 224 to perform operations, and the detection circuit module 224 generates a high-potential detection signal DET to The operating status signal OP indicating that the operating status of the computer system 20 is normal and is latched into a high potential via the latch circuit module 224 . When the operating status signal OP is at a high potential, the gate of the transistor TR6 receives the high potential operating status signal OP, and the voltage between the gate and the source of the transistor TR6 is greater than the forward bias voltage to turn on the transistor TR6. At the same time, when the transistor TR6 is turned on, the operating power BT output through the pin PP can be connected to the ground terminal through the resistor R4 connected in series, so that both ends of the resistor R4 have a voltage, and the voltage between the gate and the source of the transistor TR5 A voltage greater than the forward bias turns on transistor TR5. Therefore, when the transistor TR5 is turned on, the switch control circuit 214 can output the operating power BT to the operating module 230 .

In addition, when the detection circuit module 224 detects that the operation of the computer system 20 is abnormal and generates a low-level detection signal DET to indicate that the operation state of the computer system 20 is abnormal, the latch circuit module 224 will latch the low voltage. After the potential detection signal DET generates a low potential operation state signal OP and does not change. When the operating status signal OP is at low potential, as mentioned above, the switch control circuit 214 will not output the operating power BT to the operating module 230 to protect the computer system 20 from being burned.

On the other hand, assuming that the backup battery 242 has a power source such that the output backup power BT_B is below the high potential, since the gate of the transistor TR4 is connected to the backup battery 242 and receives the high potential backup power BT_B and the source of the transistor TR4 is connected to the ground Therefore, the voltage between the gate and the source of the transistor TR4 will be greater than the forward bias voltage so that the transistor TR4 is turned on. At the same time, when the battery module 212 has not started to output the operating power BT, since the source of the transistor TR2 in the voltage stabilizing module 220 is connected to the high-potential backup power BT_B and the gate of the transistor TR2 is connected to the low-potential operating power BT, the transistor The voltage between the source and the gate of TR2 is greater than the forward bias voltage so that the transistor TR2 is turned on. Thus, the voltage stabilizing module 220 can output the backup power BT_B as a stable power PWR through the diode D4 to provide the power required by the detection circuit module 224 for detection.

In this case, after the gate of the transistor TR3 receives the detection signal DET of the detection circuit module 224, when the transistor TR4 is turned on and the detection signal DET is at a high potential, that is, the operating state of the computer system 20 is in a normal state, so that The voltage between the source and the gate of the transistor TR3 is greater than the forward bias voltage and is turned on, so that the pin SP of the battery module 212 is connected to the ground terminal through the transistors TR3 and TR4 to start the battery module 212 to output the operating power BT. When the transistor TR4 is turned on and the detection signal DET is at a low potential, that is, the operating state of the computer system 20 is in an abnormal state, so that the voltage between the source and the gate of the transistor TR3 is lower than the forward bias voltage and is turned off, thereby making the battery module The pin SP of the 212 cannot be connected to the ground terminal through the transistors TR3 and TR4, so the battery module 212 cannot be started to output the operating power BT.

To put it simply, in this embodiment, the pin SP of the battery module 212 is connected to the startup control circuit 210 and the backup startup circuit 240, so that when the backup battery 242 has power, the backup startup circuit 240 will have a high potential. The pin SP is connected to the ground terminal, and when the backup battery 242 has no power or is damaged, the pin SP with a high potential is connected to the ground terminal through the start control circuit 210, and then the battery module 212 is started to output the operating power BT. At the same time, when the latch circuit module 224 is in an abnormal operating state such as overvoltage, overcurrent or overtemperature in the operating state of the computer system 20, the latching detection signal DET of low potential becomes the operating state signal OP of low potential. In order to prevent the switch control circuit 214 from outputting the operating power BT to the operating module 230, it is possible to avoid generating a fluctuating operating state signal OP when the detection signal DET changes, so that the switching control circuit 214 outputs the operating power BT to the operating module 230. The module 230 causes the computer system 20 to be burned.

Specifically, in the power supply system of the computer system, the present invention uses the power of the battery module itself combined with a circuit to start the battery module to output power, and does not need to use the power of an additional battery (such as an RTC battery) to start the battery module. The output power can be modified or changed by those skilled in the art. For example, in this embodiment, the start control circuit 110 generates the power control signal CON shown as start to start the battery module 212. The start control circuit 110 connects the pin SP of the battery module 212 to the ground terminal to start the battery module 212. . However, in other embodiments, the start control circuit 110 generates the power control signal CON shown as start to start the battery module 212. The power control signal CON can also be input to another specific pin of the battery module 212 to start the battery module 212. , or transmit the power control signal CON including the starting command to the battery module 212 to start the battery module 212 , etc., which can be changed according to the design of the battery module 212 without limitation. Furthermore, in this embodiment, the latch circuit module 224 is implemented by using a two-inverter gate to latch the low-potential operation state signal OP. In other embodiments, the latch circuit module 224 can also be realized by a plurality of NAND gates or registers without limitation.

To sum up, in the prior art, the RTC battery is used to provide power to the start-up circuit to start the battery module to output power. When the RTC battery is dead or damaged, the start-up circuit has no power to start the battery module to output power. In contrast, the present invention utilizes the power source of the battery module itself to activate the output power of the battery module through a circuit, and does not use the RTC battery to activate the output power of the internal battery module, which is more convenient.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (15)

1. A power supply system, which is used in a computer system to provide an operation power supply required for the operation of an operation module. The power supply system includes: A battery module, used to generate a battery status signal, and determine whether to output the operating power according to a power control signal; A starting control circuit, coupled to the battery module, is used to generate the power control signal according to the battery status signal or the operating power supply, and output it to the battery module; A state detection module, coupled to the battery module, is used to detect an operation state of the computer system by using the operation power outputted by the battery module, and generate an operation state signal; and a switch control circuit, coupled to the battery module, the state detection module and the operation module, for outputting the operation power outputted by the battery module to the operation module according to the operation state signal; The switch control circuit includes: A fifth transistor includes a first terminal, a second terminal and a control terminal, the first terminal is used to output the operating power to the operation module, the second terminal is coupled to the battery module, and is used to receive the operating source; A sixth transistor includes a first terminal, a second terminal and a control terminal, the first terminal is coupled to the control terminal of the fifth transistor, the second terminal is coupled to a ground terminal, and the control terminal coupled to the status detection module for receiving the operation status signal; and A fourth resistor, including a first terminal coupled between the control terminal of the fifth transistor and the first terminal of the sixth transistor, and a second terminal coupled to the second terminal of the fifth transistor . 2. The power supply system as claimed in claim 1, wherein when the power control signal indicates that the battery module is operating in a startup state, the battery module outputs the operating power, and when the power control signal indicates that the battery module is operating in a In the initial state, the battery module does not output the operating power. 3. The power supply system as claimed in claim 1, wherein when the battery module does not output the operating power, the battery status signal generated by the battery module is a first state, and when the battery module outputs the operating power , the battery status signal generated by the battery module is a second status. 4. The power supply system as claimed in claim 3, wherein when the battery status signal is the first state or the operating power is at a high potential, the startup control circuit generates the power supply control signal shown as startup to control the The battery module operates in a starting state, and when the battery state signal is in the second state and the operating power source is at a low potential, the starting control circuit generates the power control signal shown as non-starting to control the battery module to operate in a initial state. 5. The power supply system as claimed in claim 1, wherein the state detecting module detects the operating state of the computer system includes detecting an operating voltage, an operating current or an operating temperature of the computer system, and at When the operating voltage, the operating current or the operating temperature exceeds the corresponding set value, the operating state signal is generated to indicate that the operating state is an abnormal state, and when the operating voltage, the operating current or the operating temperature is not When the corresponding set value is exceeded, the operation state signal is generated to show that the operation state is a normal state. 6. The power supply system as claimed in claim 1, wherein the switch control circuit outputs the operating power outputted by the battery module to the operating module when the operating state signal indicates that the operating state is a normal state, and then When the operation state signal indicates that the operation state is an abnormal state, the operation power outputted by the battery module is not output to the operation module. 7. The power supply system as claimed in claim 1, wherein the status detection module comprises: A voltage stabilizing module, coupled to the battery module, used to convert the operating power output by the battery module to output a stable power supply; a detecting circuit module, coupled to the voltage stabilizing module, used for using the stable power supply to detect the operation state of the computer system, and generate a detection signal; and A latch circuit module, coupled to the voltage stabilizing module and the detection circuit module, is used to use the stable power supply to latch the detection signal and generate the operation status signal. 8. The power supply system as claimed in claim 7, further comprising: a backup battery for outputting a backup power source; and a backup starting circuit, coupled to the backup battery, the detection circuit module and the battery module, used to generate a backup control signal according to the backup power supply and the detection signal, and output it to the battery module; Wherein, the voltage stabilizing module is coupled to the battery module and the backup battery, and is used to convert the operating power or the backup power to output the stable power; Wherein, the battery module determines whether to output the operating power according to the power control signal or the backup control signal. 9. The power supply system as claimed in claim 8, wherein when the backup power is at a high potential and the detection signal indicates that the operating state is a normal state, the backup activation circuit generates the backup control signal indicating activation, To control the battery module to operate in a startup state, when the backup power supply is at a low potential or the detection signal shows that the operation status is an abnormal state, the backup startup circuit generates the backup control signal that is shown as non-start, so as to The battery module is controlled to operate in an initial state. 10. The power supply system as claimed in claim 8, wherein when the power control signal or the standby control signal indicates that the battery module is operating in a startup state, the battery module outputs the operating power, and when the power control signal and the When the backup control signal indicates that the battery module is operating in an initial state, the battery module does not output the operating power. 11. The power supply system as claimed in claim 1, wherein the startup control circuit comprises: a first diode, including a first terminal and a second terminal, the first terminal is coupled to the battery module, and is used for receiving the battery status signal; a first resistor, including a first terminal and a second terminal, the first terminal is coupled to the second terminal of the first diode; A first capacitor, including a first terminal coupled to the second terminal of the first resistor, and a second terminal coupled to a ground terminal; A first transistor includes a first terminal, a second terminal and a control terminal, the first terminal is coupled to the ground terminal, the control terminal is coupled to the second terminal of the first resistor and the first Between the first end of the capacitor, the second end is coupled to the battery module for outputting the power control signal to the battery module; and A second diode, including a first terminal coupled to the control terminal of the first transistor, between the second terminal of the first resistor and the first terminal of the first capacitor, and a second terminal coupled to the battery module for receiving the operating power. 12. The power supply system as claimed in claim 8, wherein the voltage stabilizing module comprises: A voltage regulator, including an input terminal and an output terminal, the input terminal is coupled to the battery module, and is used to receive the operating power outputted by the battery module; A second transistor, including a first terminal, a second terminal and a control terminal, the second terminal is coupled to the backup battery for receiving the backup power output from the backup battery, the control terminal is coupled to the input terminal of the voltage regulator; a second resistor, comprising a first terminal coupled between the input terminal of the voltage regulator and the control terminal of the second transistor, and a second terminal coupled to a ground terminal; a third diode including a first terminal and a second terminal, the first terminal is coupled to the output terminal of the voltage regulator; and A fourth diode, including a first terminal coupled to the first terminal of the second transistor, and a second terminal coupled to the second terminal of the third diode, for outputting the Stabilize power. 13. The power supply system as claimed in claim 12, wherein the voltage regulator is a low dropout regulator. 14. The power supply system as claimed in claim 8, wherein the latch circuit module comprises: A first NOT gate, including a power input terminal, a first terminal and a second terminal, the power input terminal is coupled to the voltage stabilizing module for receiving the stable power supply, the first terminal is coupled to the a detection circuit module, configured to receive the detection signal; A second NOT gate, including a power input terminal, a first terminal and a second terminal, the power input terminal is coupled to the voltage stabilizing module for receiving the stable power supply, the first terminal is coupled to the The second terminal of the first NOT gate, the second terminal is coupled to the first terminal of the first NOT gate, and is used to generate the operation status signal; and A third resistor includes a first terminal coupled between the second terminal of the first NOT gate and the first terminal of the second NOT gate, and a second terminal coupled to a ground terminal. 15. The power supply system as claimed in claim 8, wherein the standby startup circuit comprises: A third transistor, including a first terminal, a second terminal and a control terminal, the first terminal is coupled to the battery module for outputting the standby control signal, the control terminal is coupled to the detection circuit module , for receiving the detection signal; and A fourth transistor, including a first terminal, a second terminal and a control terminal, the first terminal is coupled to the second terminal of the third transistor, the second terminal is coupled to a ground terminal, the control The terminal is coupled to the backup battery for receiving the backup power.