WO2021008357A1 - Battery protection controller and battery charging and discharging protection circuit - Google Patents

Battery protection controller and battery charging and discharging protection circuit Download PDF

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Publication number
WO2021008357A1
WO2021008357A1 PCT/CN2020/099399 CN2020099399W WO2021008357A1 WO 2021008357 A1 WO2021008357 A1 WO 2021008357A1 CN 2020099399 W CN2020099399 W CN 2020099399W WO 2021008357 A1 WO2021008357 A1 WO 2021008357A1
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WO
WIPO (PCT)
Prior art keywords
charging
load short
diode
circuit
switch tube
Prior art date
Application number
PCT/CN2020/099399
Other languages
French (fr)
Chinese (zh)
Inventor
李友玲
Original Assignee
深圳市菱奇半导体有限公司
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Filing date
Publication date
Application filed by 深圳市菱奇半导体有限公司 filed Critical 深圳市菱奇半导体有限公司
Publication of WO2021008357A1 publication Critical patent/WO2021008357A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/18—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for batteries; for accumulators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits

Definitions

  • the invention relates to the field of battery protection control, in particular to a battery protection controller and a battery charging and discharging protection circuit.
  • lithium battery protection controllers are widely used, but how to protect the controller On the basis of improving the protection function, further reducing the cost of the lithium battery protection controller and reducing the size of the lithium battery protection controller are issues that need to be studied and considered.
  • the frame of the traditional lithium battery protection controller also includes other functional pins according to different requirements.
  • the pin is the charging drive pin 3, its function is to control the opening and closing of the charging switch tube, and another function pin is the load short-circuit monitoring pin 4. Its function is to detect when the lithium battery is short-circuited and the discharge switch tube is turned off. Whether the lithium battery output load short-circuit state is released, so in order to complete the above two functions, the traditional lithium battery protection controller needs to be configured with two different function pins to achieve, which makes the lithium battery protection controller package more pins , The volume and cost are also relatively large.
  • the technical problem to be solved by the present invention is that the existing battery protection controller has many pins, and the volume and cost are relatively large.
  • the technical solution adopted by the present invention to solve its technical problem is: constructing a battery protection controller for controlling the on-off of the charging switch tube through the second charging drive module, and passing the second load when the load short circuit protection occurs.
  • the short-circuit monitoring module generates a load short-circuit monitoring current to monitor whether the load short-circuit state is released.
  • the battery protection controller includes a first charging drive module for generating a driving current signal for the charging switch tube, and for monitoring the incoming load short-circuit The first load short-circuit monitoring module that compares the current with the reference current and outputs a monitoring signal of the load short-circuit state according to the comparison result.
  • the battery protection controller includes a first diode and a multiplexing pin provided on the outer frame.
  • the multiplexing pins are respectively connected to the first charging drive module, the second charging drive module, and the second load short-circuit monitoring module.
  • the multiplexing pins are also connected to the anode of the first diode, and the first diode
  • the cathode of the tube is connected to the first load short-circuit monitoring module.
  • the first load short-circuit monitoring module includes: a first Zener diode, a first current source, a first switch tube, and a second switch tube, wherein the first switch tube and the second switch tube share a common gate.
  • the source constitutes a current mirror
  • the cathode of the first zener diode is connected to the cathode of the first diode
  • the anode of the first zener diode is connected to the gate and the drain of the first switch tube.
  • the drain of the second switch tube is connected to one end of the first current source
  • the drain of the second switch tube is the output terminal of the first load short-circuit monitoring module.
  • the first load short-circuit monitoring module includes: a second Zener diode, a first resistor and a comparator; wherein the cathode of the second Zener diode is connected to the anode of the first diode, so The anode of the second zener diode is connected to the reference ground through the first resistor, one input terminal of the comparator is input with a reference reference voltage, and the other input terminal of the comparator is connected to the anode of the second zener diode , The output terminal of the comparator is the output terminal of the first load short-circuit monitoring module.
  • the first charging drive module includes a second current source and a switch
  • the second current source is controlled by turning on and off the switch, and then the multiplexing pin and the The second charging drive module controls the on and off of the charging switch tube.
  • the present invention also constructs a battery charging and discharging protection circuit, which includes a charging switch tube, a second charging drive module and a second load short circuit monitoring module, and is characterized in that it also includes the above-mentioned battery protection controller.
  • the second charging drive module includes a second resistor, and one end of the second resistor is connected to the gate terminal of the charging switch tube, and the other end of the second resistor is connected to the charging switch tube. Source extreme.
  • the second charging drive module includes a third resistor, and one end of the third resistor is connected to the multiplexing pin, and the other end of the third resistor is connected to the gate of the charging switch tube. extreme.
  • the second load short-circuit monitoring module includes a fourth resistor and a second diode, one end of the fourth resistor is connected to the multiplexing pin, and the other end of the fourth resistor is connected to the second The cathode of the diode, and the anode of the second diode is connected to the source terminal of the charging switch tube.
  • the second load short-circuit monitoring module includes a fourth resistor and a second diode, one end of the fourth resistor is connected to the multiplexing pin, and the other end of the fourth resistor is connected to the second The cathode of the diode, and the anode of the second diode is connected to the drain terminal of the charging switch.
  • the charging switch tube is an N-type MOS tube or a P-type MOS tube.
  • the multiplexed pin of the battery protection controller has the functions of the charging drive pin and the load short-circuit monitoring pin in the prior art, which can reduce the number of pins of the battery protection controller package , Thereby reducing volume and cost.
  • FIG. 1 is a schematic structural diagram of a battery charging and discharging protection circuit in the prior art.
  • Embodiment 2 is an external circuit diagram of Embodiment 1 of the battery charging and discharging protection circuit of the present invention.
  • Embodiment 3 is an internal circuit diagram of Embodiment 1 of the battery charge and discharge protection circuit of the present invention.
  • FIG. 4 is a circuit diagram of the first embodiment of the first load short-circuit monitoring module in the battery protection controller of the present invention.
  • FIG. 5 is a circuit diagram of the second embodiment of the first load short-circuit monitoring module in the battery protection controller of the present invention.
  • Embodiment 6 is an external circuit diagram of Embodiment 2 of the battery charge and discharge protection circuit of the present invention.
  • Fig. 7 is an internal circuit diagram of the second embodiment of the battery charging and discharging protection circuit of the present invention.
  • FIG. 8 is a circuit diagram of Embodiment 3 of the battery charging and discharging protection circuit of the present invention.
  • Fig. 9 is a circuit diagram of a fourth embodiment of the battery charge and discharge protection circuit of the present invention.
  • Embodiment 10 is a circuit diagram of Embodiment 5 of the battery charge and discharge protection circuit of the present invention.
  • the battery charging and discharging protection circuit of this embodiment includes a battery protection controller 100 and peripheral components, wherein the peripheral components include a charging switch tube 105.
  • the battery protection controller 100 includes a first charging driving module 207, a first load short-circuit monitoring module 204, and a first diode 203.
  • the outer frame of the battery protection controller 100 is provided with a power supply pin 11, a reference ground pin 12, and a multiplexing pin 13.
  • the multiplexing pin 13 is a dual-function pin and is respectively connected to the first charging drive module , The second charging drive module 114 and the second load short-circuit monitoring module 113, the multiplexing pin 13 is also connected to the anode of the first diode 203, and the cathode of the first diode 203 is connected to the first load short-circuit monitoring module 204.
  • the battery protection controller 100 is used to control the on-off of the charging switch tube 105 through the second charging drive module 114, and to generate load short-circuit monitoring through the second load short-circuit monitoring module 113 when load short-circuit protection occurs. Current to monitor whether the load short-circuit state is removed.
  • the function of the first charging driving module 207 is to generate a driving current signal of the charging switch tube 105, and the driving current signal flows into the second charging driving module 114 through the multiplexing pin 13; the second charging driving module 114 functions in the first When a charging driving module 207 generates a driving current signal, the gate voltage of the charging switch tube 105 is equal to the source voltage, so that the charging switch tube 105 is turned on.
  • the function of the second load short-circuit monitoring module 113 is to generate an additional current path when the discharge switch tube (not shown) is turned off due to a load short-circuit, so that the generated load short-circuit monitoring current passes through the coupled multiplexing pin 13 and
  • the first diode 203 flows into the first load short-circuit monitoring module 204;
  • the function of the first load short-circuit monitoring module 204 is to compare the incoming load short-circuit monitoring current with a reference current, and output a monitoring signal of the load short-circuit state according to the comparison result.
  • the first charging and driving module 207 when working normally (normal charging or normal discharging), the first charging and driving module 207 outputs a driving current signal, and the driving current signal passes through the multiplexing pin 13 and the second charging and driving module 114.
  • the charging switch tube 105 is turned on.
  • the second load short circuit monitoring module 113 When a load short circuit occurs, the second load short circuit monitoring module 113 generates an additional current path, so that the generated load short circuit monitoring current flows into the first load short circuit monitoring module 204 through the multiplexing pin 13 and the first diode 203 to
  • the first load short-circuit monitoring module 204 compares the inflowing load short-circuit monitoring current with the reference current, and outputs a monitoring signal of the load short-circuit state according to the comparison result. Therefore, the multiplexing pin 13 has the functions of the charging drive pin and the load short-circuit monitoring pin in the prior art, which can reduce the number of pins of the battery protection controller package, thereby reducing the volume and cost.
  • the first load short-circuit monitoring module 204 of this embodiment includes: a first Zener diode 301, a first current source 304, a first The switching tube 302 and the second switching tube 303, and the first switching tube 302 and the second switching tube 303 are both NMOS tubes.
  • the first switching tube 302 and the second switching tube 303 share a common gate to form a current mirror
  • the cathode of the first Zener diode 301 is connected to the cathode of the first diode 203
  • the anode of the first Zener diode 301 is connected to the first diode.
  • the gate and drain of the switching tube 302, the source of the first switching tube 302 and the source of the second switching tube 303 are respectively connected to the reference ground, and the drain of the second switching tube 303 is connected to one end of the first current source 304, Moreover, the drain of the second switch tube 303 is the output terminal of the first load short-circuit monitoring module 204.
  • the stabilized voltage of the first Zener diode 301 is, for example, about 12V
  • the connection of the first switch tube 302 and the second switch tube 303 constitutes a current mirror, and will flow through the first Zener diode 301 and
  • the current of the first switch tube 302 is mirrored to the second switch tube 303.
  • the current of the first current source 304 can be a set fixed current I0 or a second current source (for example, the second current source 206 in FIG. 7 ) Mirror current.
  • the working principle of the first load short-circuit monitoring module 204 will be described below: in normal operation, the first charging drive module flows out a driving current, thereby setting the gate of the charging switch tube 105 to a high potential. No current is consumed, so most of the driving current flows into the first load short-circuit monitoring module 204 through the first diode 203. At this time, the driving current passes through the first Zener diode 301 and the first switch tube 302 to the controller ground.
  • VD203+VD301+VMNTH the grid voltage of the charging switch tube 105 will be clamped to a fixed value, which is VD203+VD301+VMNTH, where VD203 is the forward voltage drop of the first diode 203, Generally, it is between 0.7V and 1V, VD301 is the voltage stabilization value of the first zener diode 301, for example 12V, and VMNTH is the voltage between the gate and the source of the first switch tube 302. Under normal circumstances, due to the low power consumption design, the current flowing through the first switching tube 302 is very small, and the current flowing through the second switching tube 303 is the current mirror image of the first switching tube 302, so it is also very small, less than the first current.
  • the set current of the source 304 so the drain of the second switch tube 303 is high (because the current flowing in the first current source 304 is greater than the current flowing out of the second switch tube 303), that is, the first load short-circuit monitoring module 204 Output a high-level signal indicating that no load short circuit has occurred.
  • the load short-circuit monitoring current flows into the reference ground through the second load short-circuit monitoring module 113, the multiplexing pin 13, the first diode 203, the first Zener diode 301, and the first switch tube 302 in sequence. Since the current on the first switch tube 302 becomes larger, the pull-down current of the second switch tube 303 also becomes larger, which is greater than the set current of the first current source 304, so the drain of the second switch tube 303 becomes a low voltage ( Controller ground), that is, the first load short-circuit monitoring module 204 outputs a low-level signal representing the occurrence of a load short-circuit.
  • the load short-circuit monitoring module 204 of this embodiment includes a second Zener diode 307, a first resistor 305, and a comparator 306.
  • the second The cathode of the Zener diode 307 is connected to the anode of the first diode 203, and the anode of the second Zener diode 307 is connected to the reference ground through the first resistor 305.
  • One input terminal of the comparator 306 is input with a reference reference voltage (Vref0).
  • the other input terminal of 306 is connected to the anode of the second Zener diode 307, and the output terminal of the comparator 306 is the output terminal of the first load short-circuit monitoring module.
  • the working principle of the first load short-circuit monitoring module 204 is described below: the current flowing into the first load short-circuit monitoring module 204 passes through the second Zener diode 307 and the first resistor 305 to the reference ground, and the voltage on the first resistor 305 is sampled The comparator 306 compares the sampled voltage with the reference voltage Vref0.
  • the battery 110 is a two-terminal battery, that is, the charging positive terminal (CHG+) and the battery positive terminal (PACK+) are combined into one port.
  • the battery charging and discharging protection circuit of this embodiment includes a battery protection controller 100, a charging switch tube 105 (with a parasitic diode 105P), a discharging switch tube 106 (with a parasitic diode 106P), a second charging drive module 114, and a second load
  • the short-circuit monitoring module 113, the second discharge driving module 115, and the sampling resistor 112 for sampling the discharge current, and the charging switch tube 105 and the discharging switch tube 106 are both NMOS tubes.
  • the battery protection controller 100 includes a first charging driving module 207, a first load short-circuit monitoring module 204, a first diode 203, a first discharging driving module (not shown), and a load short-circuit protection module (not shown).
  • the first discharge driving module is used to generate a driving current signal of the discharge switch tube
  • the load short-circuit protection module is used to control the discharge switch tube 106 to turn off when the voltage of the sampling resistor 112 is greater than a preset value.
  • the outer frame of the battery protection controller 100 is provided with a power supply pin (BAT4) 11, a reference ground pin (VSS) 12, a multiplexing pin (CHG) 13, a discharge drive pin (DSG) 14 and a current detection pin.
  • Pin (ISEN) 15, and the multiplexing pin 13 is a dual-function pin, and is respectively connected to the first charging drive module 207, the second charging drive module 114 and the second load short-circuit monitoring module 113, the multiplexing pin 13
  • the anode of the first diode 203 is also connected, and the cathode of the first diode 203 is connected to the first load short-circuit monitoring module 204.
  • the discharge driving pin 14 is connected to the first discharge driving module and the second discharge driving module 115.
  • the source terminal of the discharge switch tube 106 is connected to the battery reference ground through the sampling resistor 112, the drain terminal of the discharge switch tube 106 is connected to the drain terminal of the charge switch tube 105, and the source terminal of the charge switch tube 105 is connected to the battery negative terminal (PACK-) and the negative charging terminal. (CHG-).
  • the current detection pin 15 of the battery protection controller 100 is connected to the source terminal of the discharge switch tube 106.
  • each module is described below: First, the circuit structure and working principle of the first load short-circuit monitoring module 204 can be referred to the original text, and will not be repeated here.
  • the first charging drive module 207 includes a second current source 206 and a switch 202.
  • One end of the second current source 206 is connected to the multiplexing pin 13, and the other end of the second current source 206 is connected to the battery 110 through the switch 202 and the power supply pin 11. positive electrode.
  • the second current source 206 is controlled by turning on and off the switch 202, and then the turning on and off of the charging switch tube is controlled by the multiplexing pin 13 and the second charging drive module coupled with it.
  • the second charging drive module 114 includes a second resistor 104 and a third resistor 102, and one end of the second resistor 104 is connected to the gate terminal of the charging switch tube 105, and the other end of the second resistor 104 is connected to the source terminal of the charging switch tube 105 .
  • One end of the third resistor 102 is connected to the multiplexing pin 13, and the other end of the third resistor 102 is connected to the gate terminal of the charging switch tube 105.
  • the third resistor 102 can also be omitted, that is, the gate terminal of the charging switch tube 105 is directly connected to the multiplexing pin 13.
  • the second load short-circuit monitoring module 113 includes a fourth resistor 101 and a second diode 103.
  • One end of the fourth resistor 101 is connected to the multiplexing pin 13, and the other end of the fourth resistor 101 is connected to the second diode 103.
  • the cathode and the anode of the second diode 103 are connected to the source of the charging switch tube 105.
  • the positions of the fourth resistor 101 and the second diode 103 can also be interchanged, that is, one end of the fourth resistor 101 is connected to the source of the charging switch tube 105, and the fourth resistor 101 The other end is connected to the anode of the second diode 103, and the cathode of the second diode 103 is connected to the multiplexing pin 13.
  • the second discharge drive module 115 includes a fifth resistor 107 and a sixth resistor 111.
  • the fifth resistor 107 is connected between the gate terminal and the source terminal of the discharge switch tube 106, and one end of the sixth resistor 111 is connected to the discharge drive pin 14. , The other end of which is connected to the gate terminal of the discharge switch tube 106.
  • the sixth resistor 111 can also be omitted, that is, the gate terminal of the discharge switch tube 111 is directly connected to the discharge drive pin 14.
  • the control switch 202 When the battery 110 is being charged, the control switch 202 is closed, and the second current source 206 flows out a driving current through the multiplexing pin (CHG) 13, for example Named I CHARGE , the driving current is generally small, about 10 uA, and the driving current passes through the second resistor 102 to turn on the charging switch tube 105.
  • CHG multiplexing pin
  • the driving current will not flow through the fourth resistor 101, and the first load short-circuit monitoring module 204 ensures that the highest voltage on the multiplexing pin 13 is limited to charging
  • the V GS the difference between the gate and source voltage
  • the first discharge driving module will also flow a discharge driving current through the discharge driving pin 14, and the discharge driving current will turn on the discharge switch tube 106 through the sixth resistor 111.
  • the charge switch tube 105 and the discharge switch tube 106 are both in the on state.
  • sampling resistor 112 and the on-resistance of the charge switch tube 105 and the discharge switch tube 106 are all very small, it is equivalent to the reference ground and the battery negative electrode (PACK- ) Straight through, as long as the charging voltage is added between the charging positive terminal (CHG+)/battery positive terminal (PACK+) and the battery negative terminal (PACK-), a charging path is formed.
  • the charging switch tube 105 and the discharging switch tube 106 are both in the on state, and because the sampling resistor 112 and the on-resistances of the charging switch tube 105 and the discharging switch tube 106 are very small, they are quite small.
  • the reference ground is directly connected to the battery negative pole (PACK-), and the load is connected between the battery positive pole (PACK+) and the battery negative pole (PACK-), so a discharge path can be formed.
  • the battery protection controller 100 judges by its current sampling pin 15 If the sampling voltage does not exceed the set value, the discharge switch tube 106 will not be triggered to turn off.
  • the battery protection controller 100 can detect through its current detection pin 15 that the voltage on the sampling resistor 112 is too large to exceed the internal set value, and will turn off the discharge drive from its discharge drive pin 14
  • the current is used to pull down the voltage of the gate terminal of the discharge switch tube 106 to the battery reference ground, so the discharge switch tube 106 is immediately turned off.
  • the impedance from the battery negative (PACK-) to the battery reference ground becomes very large. Since the output load is in a short-circuit state, the voltage of the battery negative terminal (PACK-) will increase, and the second diode 103 will be turned on to generate a new load short-circuit monitoring current, for example named I SCP_DET .
  • the load short-circuit monitoring current is relatively large. It is about 100-200 uA, and the current flows into the first load short-circuit monitoring module 204 through the second diode 103 ⁇ the fourth resistor 101 ⁇ the multiplexing pin 13 ⁇ the first diode 203. Since the current I SCP_DET + I CHARGE flowing into the first load short-circuit monitoring module 204 is much greater than I CHARGE , the first load short-circuit monitoring module 204 detects a current greater than I CHARGE and considers that a load short circuit has occurred.
  • the load short-circuit monitoring current flowing into the first load short-circuit monitoring module 204 through the aforementioned path is again less than or equal to I CHARGE , and then the load short-circuit is considered to be removed. At this time, it can be regenerated by the first discharge driving module.
  • the discharge driving current is used to restart the discharge switch tube 106.
  • the fourth resistor 101 is introduced for current limitation to avoid damage to the multiplexing pin.
  • Embodiment 3 of the battery charging and discharging protection circuit of the present invention.
  • the second load short-circuit monitoring module The anode of the second diode 103 in 113 is connected to the drain terminal of the discharge switch tube 106, and other similarities are not repeated here.
  • FIG 9 is a schematic structural diagram of the fourth embodiment of the battery charging and discharging protection circuit of the present invention.
  • the charging switch 105A uses P Type MOS tube (with parasitic diode), and the drain terminal of the charging switch tube 105A is connected to the positive terminal of the battery, and the source terminal of the charging switch tube 105A is connected to the charging positive terminal (CHG+).
  • the drain terminal of the discharge switch tube 106 is directly connected to the battery negative terminal (PAC-) and the negative charging terminal (CHG-).
  • the first charging drive module 207A includes a second current source 206A and a switch 202A.
  • One end of the second current source 206A is connected to the anode of the first diode 203A and one end of the switch 202A, and the other end of the switch 202 is connected to the multiplexer.
  • Pin, the cathode of the first diode 203A is connected to the second load short-circuit monitoring module 204.
  • the anode of the first diode 203A can also be directly connected to the multiplexing pin 13.
  • the second load short-circuit monitoring module 113A includes a third resistor 101A and a second diode 103A, wherein one section of the third resistor 101A is connected to the multiplexing pin 13, and the other section of the third resistor 101A is connected to the second diode 103A
  • the cathode of the second diode 103A is connected to the drain of the discharge switch tube 106.
  • Embodiment 10 is a schematic structural diagram of Embodiment 5 of the battery charging and discharging protection circuit of the present invention.
  • the battery 110 is a three-terminal battery
  • the battery charging and discharging protection circuit also includes A third diode 115, the cathode of the third diode 115 is connected to the battery anode (PAC+), and the anode of the third diode 115 is connected to the positive charging terminal (CHG+).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)
  • Protection Of Static Devices (AREA)

Abstract

A battery protection controller (100) and a battery charging and discharging protection circuit. The battery protection controller (100) comprises a first charging driving module (207) and a first load short circuit monitoring module (204), and also comprises a first diode (203) and a multiplexing pin (13) provided on an outer frame; the multiplexing pin (13) is connected to the first charging driving module (207), a second charging driving module (114), and a second load short circuit monitoring module (113), separately; the multiplexing pin (13) is also connected to an anode of the first diode (203), and a cathode of the first diode (203) is connected to the first load short circuit monitoring module (204).

Description

电池保护控制器及电池充放电保护电路Battery protection controller and battery charging and discharging protection circuit 技术领域Technical field
本发明涉及电池保护控制领域，尤其涉及一种电池保护控制器及电池充放电保护电路。The invention relates to the field of battery protection control, in particular to a battery protection controller and a battery charging and discharging protection circuit.
背景技术Background technique
现今，由于锂电池的成本降低，体积缩小，越来越多的便携式设备使用锂电池进行供电，基于锂电池的安全性要求，锂电池保护控制器被大量使用，但是如何在锂电池保护控制器完善保护功能的基础上，进一步降低锂电池保护控制器的成本，同时减小锂电池保护控制器的体积是需要研究和考虑的问题。Nowadays, due to the reduction in the cost and size of lithium batteries, more and more portable devices use lithium batteries for power supply. Based on the safety requirements of lithium batteries, lithium battery protection controllers are widely used, but how to protect the controller On the basis of improving the protection function, further reducing the cost of the lithium battery protection controller and reducing the size of the lithium battery protection controller are issues that need to be studied and considered.
如图1所示，传统的锂电池保护控制器的外框除了电源引脚1和参考地引脚2外，根据需求不同，还包括其它功能引脚，在众多功能引脚中，一个功能引脚是充电驱动引脚3，其作用是控制充电开关管的开启和关闭，还有一个功能引脚是负载短路监测引脚4，其作用是在锂电池发生短路，放电开关管关闭后，检测锂电池输出负载短路状态是否解除，所以传统的锂电池保护控制器为了完成上述两个功能，需要配置两个不同的功能引脚来实现，这就使锂电池保护控制器封装的引脚较多，体积、成本也较大。As shown in Figure 1, in addition to the power supply pin 1 and the reference ground pin 2, the frame of the traditional lithium battery protection controller also includes other functional pins according to different requirements. Among the many functional pins, one function leads The pin is the charging drive pin 3, its function is to control the opening and closing of the charging switch tube, and another function pin is the load short-circuit monitoring pin 4. Its function is to detect when the lithium battery is short-circuited and the discharge switch tube is turned off. Whether the lithium battery output load short-circuit state is released, so in order to complete the above two functions, the traditional lithium battery protection controller needs to be configured with two different function pins to achieve, which makes the lithium battery protection controller package more pins , The volume and cost are also relatively large.
另外，不仅仅是锂电池保护控制器，同样的技术问题也存于其它的电池保护控制器。In addition, not only the lithium battery protection controller, the same technical problems also exist in other battery protection controllers.
技术问题technical problem
本发明要解决的技术问题在于，现有的电池保护控制器的引脚较多，体积、成本较大。The technical problem to be solved by the present invention is that the existing battery protection controller has many pins, and the volume and cost are relatively large.
技术解决方案Technical solutions
本发明解决其技术问题所采用的技术方案是：构造一种电池保护控制器，用于通过第二充电驱动模块对充电开关管的通断进行控制，及在发生负载短路保护时通过第二负载短路监测模块产生负载短路监测电流以监测负载短路状态是否解除，所述电池保护控制器包括用于产生充电开关管的驱动电流信号的第一充电驱动模块，以及，用于将流入的负载短路监测电流和参考电流进行比较，并根据比较结果输出负载短路状态的监测信号的第一负载短路监测模块，所述电池保护控制器包括第一二极管及设置于外框的复用引脚，所述复用引脚分别连接第一充电驱动模块、第二充电驱动模块和第二负载短路监测模块，所述复用引脚还连接所述第一二极管的阳极，所述第一二极管的阴极连接所述第一负载短路监测模块。The technical solution adopted by the present invention to solve its technical problem is: constructing a battery protection controller for controlling the on-off of the charging switch tube through the second charging drive module, and passing the second load when the load short circuit protection occurs. The short-circuit monitoring module generates a load short-circuit monitoring current to monitor whether the load short-circuit state is released. The battery protection controller includes a first charging drive module for generating a driving current signal for the charging switch tube, and for monitoring the incoming load short-circuit The first load short-circuit monitoring module that compares the current with the reference current and outputs a monitoring signal of the load short-circuit state according to the comparison result. The battery protection controller includes a first diode and a multiplexing pin provided on the outer frame. The multiplexing pins are respectively connected to the first charging drive module, the second charging drive module, and the second load short-circuit monitoring module. The multiplexing pins are also connected to the anode of the first diode, and the first diode The cathode of the tube is connected to the first load short-circuit monitoring module.
优选地，所述第一负载短路监测模块包括：第一稳压二极管、第一电流源、第一开关管和第二开关管，其中，所述第一开关管和第二开关管共栅共源构成电流镜，所述第一稳压二极管的阴极连接所述第一二极管的阴极，所述第一稳压二极管的阳极连接所述第一开关管的栅极和漏极，所述第二开关管的漏极和所述第一电流源的一端连接，而且，所述第二开关管的漏极为所述第一负载短路监测模块的输出端。Preferably, the first load short-circuit monitoring module includes: a first Zener diode, a first current source, a first switch tube, and a second switch tube, wherein the first switch tube and the second switch tube share a common gate. The source constitutes a current mirror, the cathode of the first zener diode is connected to the cathode of the first diode, and the anode of the first zener diode is connected to the gate and the drain of the first switch tube. The drain of the second switch tube is connected to one end of the first current source, and the drain of the second switch tube is the output terminal of the first load short-circuit monitoring module.
优选地，所述第一负载短路监测模块包括：第二稳压二极管、第一电阻和一个比较器；其中，所述第二稳压二极管的阴极连接所述第一二极管的阳极，所述第二稳压二极管的阳极通过所述第一电阻接参考地，所述比较器的一个输入端输入参考基准电压，所述比较器的另外一个输入端接所述第二稳压二极管的阳极，所述比较器的输出端为所述第一负载短路监测模块的输出端。Preferably, the first load short-circuit monitoring module includes: a second Zener diode, a first resistor and a comparator; wherein the cathode of the second Zener diode is connected to the anode of the first diode, so The anode of the second zener diode is connected to the reference ground through the first resistor, one input terminal of the comparator is input with a reference reference voltage, and the other input terminal of the comparator is connected to the anode of the second zener diode , The output terminal of the comparator is the output terminal of the first load short-circuit monitoring module.
优选地，所述第一充电驱动模块包括第二电流源和开关，通过所述开关的开启和关闭控制所述第二电流源，继而通过与之耦和的所述复用引脚和所述第二充电驱动模块控制所述充电开关管的开启和关闭。Preferably, the first charging drive module includes a second current source and a switch, the second current source is controlled by turning on and off the switch, and then the multiplexing pin and the The second charging drive module controls the on and off of the charging switch tube.
本发明还构造一种电池充放电保护电路，包括充电开关管、第二充电驱动模块和第二负载短路监测模块，其特征在于，还包括以上所述的电池保护控制器。The present invention also constructs a battery charging and discharging protection circuit, which includes a charging switch tube, a second charging drive module and a second load short circuit monitoring module, and is characterized in that it also includes the above-mentioned battery protection controller.
优选地，所述第二充电驱动模块包括第二电阻，而且，所述第二电阻的其中一端连接所述充电开关管的栅极端，所述第二电阻的另外一端连接所述充电开关管的源极端。Preferably, the second charging drive module includes a second resistor, and one end of the second resistor is connected to the gate terminal of the charging switch tube, and the other end of the second resistor is connected to the charging switch tube. Source extreme.
优选地，所述第二充电驱动模块包括第三电阻，而且，所述第三电阻的其中一端连接到所述复用引脚，所述第三电阻的另外一端连接所述充电开关管的栅极端。Preferably, the second charging drive module includes a third resistor, and one end of the third resistor is connected to the multiplexing pin, and the other end of the third resistor is connected to the gate of the charging switch tube. extreme.
优选地，所述第二负载短路监测模块包括第四电阻和第二二极管，所述第四电阻的其中一端连接到所述复用引脚，所述第四电阻的另外一端连接第二二极管的阴极，所述第二二极管的阳极连接到充电开关管的源极端。Preferably, the second load short-circuit monitoring module includes a fourth resistor and a second diode, one end of the fourth resistor is connected to the multiplexing pin, and the other end of the fourth resistor is connected to the second The cathode of the diode, and the anode of the second diode is connected to the source terminal of the charging switch tube.
优选地，所述第二负载短路监测模块包括第四电阻和第二二极管，所述第四电阻的其中一端连接到所述复用引脚，所述第四电阻的另外一端连接第二二极管的阴极，所述第二二极管的阳极连接到充电开关管的漏极端。Preferably, the second load short-circuit monitoring module includes a fourth resistor and a second diode, one end of the fourth resistor is connected to the multiplexing pin, and the other end of the fourth resistor is connected to the second The cathode of the diode, and the anode of the second diode is connected to the drain terminal of the charging switch.
优选地，所述充电开关管为N型MOS管或P型MOS管。Preferably, the charging switch tube is an N-type MOS tube or a P-type MOS tube.
有益效果Beneficial effect
实施本发明的技术方案，电池保护控制器的复用引脚具有现有技术中充电驱动引脚及负载短路监测引脚这两个引脚的功能，可减少电池保护控制器封装的引脚数量，进而减少体积和成本。To implement the technical solution of the present invention, the multiplexed pin of the battery protection controller has the functions of the charging drive pin and the load short-circuit monitoring pin in the prior art, which can reduce the number of pins of the battery protection controller package , Thereby reducing volume and cost.
附图说明Description of the drawings
图1是现有技术中电池充放电保护电路的结构示意图。FIG. 1 is a schematic structural diagram of a battery charging and discharging protection circuit in the prior art.
图2是本发明电池充放电保护电路实施例一的外部电路图。2 is an external circuit diagram of Embodiment 1 of the battery charging and discharging protection circuit of the present invention.
图3是本发明电池充放电保护电路实施例一的内部电路图。3 is an internal circuit diagram of Embodiment 1 of the battery charge and discharge protection circuit of the present invention.
图4是本发明电池保护控制器中第一负载短路监测模块实施例一的电路图。4 is a circuit diagram of the first embodiment of the first load short-circuit monitoring module in the battery protection controller of the present invention.
图5是本发明电池保护控制器中第一负载短路监测模块实施例二的电路图。5 is a circuit diagram of the second embodiment of the first load short-circuit monitoring module in the battery protection controller of the present invention.
图6是本发明电池充放电保护电路实施例二的外部电路图。6 is an external circuit diagram of Embodiment 2 of the battery charge and discharge protection circuit of the present invention.
图7是本发明电池充放电保护电路实施例二的内部电路图。Fig. 7 is an internal circuit diagram of the second embodiment of the battery charging and discharging protection circuit of the present invention.
图8是本发明电池充放电保护电路实施例三的电路图。FIG. 8 is a circuit diagram of Embodiment 3 of the battery charging and discharging protection circuit of the present invention.
图9是本发明电池充放电保护电路实施例四的电路图。Fig. 9 is a circuit diagram of a fourth embodiment of the battery charge and discharge protection circuit of the present invention.
图10是本发明电池充放电保护电路实施例五的电路图。10 is a circuit diagram of Embodiment 5 of the battery charge and discharge protection circuit of the present invention.
本发明的实施方式Embodiments of the invention
下面结合附图详细说明本发明的具体实施方式。The specific embodiments of the present invention will be described in detail below with reference to the drawings.
在此记载的具体实施方式/实施例为本发明的特定的具体实施方式，用于说明本发明的构思，均是解释性和示例性的，不应解释为对本发明实施方式及本发明范围的限制。除在此记载的实施例外，本领域技术人员还能够基于本申请权利要求书和说明书所公开的内容采用显而易见的其它技术方案，这些技术方案包括采用对在此记载的实施例的做出任何显而易见的替换和修改的技术方案，都在本发明的保护范围之内。The specific implementations/examples described here are specific specific implementations of the present invention, which are used to illustrate the concept of the present invention. They are all explanatory and exemplary, and should not be construed as affecting the implementation of the present invention and the scope of the present invention. limit. In addition to the implementation exceptions described here, those skilled in the art can also adopt other obvious technical solutions based on the content disclosed in the claims and specification of this application. These technical solutions include adopting any obvious changes to the embodiments described herein. The replacement and modified technical solutions are all within the protection scope of the present invention.
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。It should be noted that the embodiments in this application and the features in the embodiments can be combined with each other if there is no conflict.
结合图2和图3，在本发明电池充放电保护电路的实施例一中，该实施例的电池充放电保护电路包括电池保护控制器100和***元器件，其中，***元器件包括充电开关管105、第二充电驱动模块114和第二负载短路监测模块113。电池保护控制器100包括第一充电驱动模块207、第一负载短路监测模块204、第一二极管203。而且，该电池保护控制器100的外框设置有电源引脚11、参考地引脚12及复用引脚13，该复用引脚13为一双功能引脚，且分别连接第一充电驱动模块、第二充电驱动模块114和第二负载短路监测模块113，该复用引脚13还连接第一二极管203的阳极，第一二极管203的阴极连接第一负载短路监测模块204。2 and 3, in the first embodiment of the battery charging and discharging protection circuit of the present invention, the battery charging and discharging protection circuit of this embodiment includes a battery protection controller 100 and peripheral components, wherein the peripheral components include a charging switch tube 105. The second charging driving module 114 and the second load short-circuit monitoring module 113. The battery protection controller 100 includes a first charging driving module 207, a first load short-circuit monitoring module 204, and a first diode 203. Moreover, the outer frame of the battery protection controller 100 is provided with a power supply pin 11, a reference ground pin 12, and a multiplexing pin 13. The multiplexing pin 13 is a dual-function pin and is respectively connected to the first charging drive module , The second charging drive module 114 and the second load short-circuit monitoring module 113, the multiplexing pin 13 is also connected to the anode of the first diode 203, and the cathode of the first diode 203 is connected to the first load short-circuit monitoring module 204.
在该实施例中，电池保护控制器100用于通过第二充电驱动模块114对充电开关管105的通断进行控制，及在发生负载短路保护时通过第二负载短路监测模块113产生负载短路监测电流，以监测负载短路状态是否解除。具体地，第一充电驱动模块207的作用是产生充电开关管105的驱动电流信号，该驱动电流信号通过复用引脚13流入第二充电驱动模块114；第二充电驱动模块114作用是在第一充电驱动模块207产生驱动电流信号时，使充电开关管105的栅极电压和源极电压相等，从而导通充电开关管105。第二负载短路监测模块113的作用是在放电开关管（未示出）因发生负载短路而关断时，产生额外的电流通路，使产生的负载短路监测电流通过耦合的复用引脚13和第一二极管203流入第一负载短路监测模块204；第一负载短路监测模块204的作用是将流入的负载短路监测电流和参考电流进行比较，并根据比较结果输出负载短路状态的监测信号。In this embodiment, the battery protection controller 100 is used to control the on-off of the charging switch tube 105 through the second charging drive module 114, and to generate load short-circuit monitoring through the second load short-circuit monitoring module 113 when load short-circuit protection occurs. Current to monitor whether the load short-circuit state is removed. Specifically, the function of the first charging driving module 207 is to generate a driving current signal of the charging switch tube 105, and the driving current signal flows into the second charging driving module 114 through the multiplexing pin 13; the second charging driving module 114 functions in the first When a charging driving module 207 generates a driving current signal, the gate voltage of the charging switch tube 105 is equal to the source voltage, so that the charging switch tube 105 is turned on. The function of the second load short-circuit monitoring module 113 is to generate an additional current path when the discharge switch tube (not shown) is turned off due to a load short-circuit, so that the generated load short-circuit monitoring current passes through the coupled multiplexing pin 13 and The first diode 203 flows into the first load short-circuit monitoring module 204; the function of the first load short-circuit monitoring module 204 is to compare the incoming load short-circuit monitoring current with a reference current, and output a monitoring signal of the load short-circuit state according to the comparison result.
通过实施该实施例的技术方案，当正常工作（正常充电或正常放电）时，第一充电驱动模块207输出驱动电流信号，该驱动电流信号通过复用引脚13、第二充电驱动模块114将充电开关管105导通。而当发生负载短路时，第二负载短路监测模块113产生额外的电流通路，使产生的负载短路监测电流通过复用引脚13和第一二极管203流入第一负载短路监测模块204，以使第一负载短路监测模块204将流入的负载短路监测电流和参考电流进行比较，并根据比较结果输出负载短路状态的监测信号。因此，复用引脚13具有现有技术中充电驱动引脚及负载短路监测引脚这两个引脚的功能，可减少电池保护控制器封装的引脚数量，进而减少体积和成本。By implementing the technical solution of this embodiment, when working normally (normal charging or normal discharging), the first charging and driving module 207 outputs a driving current signal, and the driving current signal passes through the multiplexing pin 13 and the second charging and driving module 114. The charging switch tube 105 is turned on. When a load short circuit occurs, the second load short circuit monitoring module 113 generates an additional current path, so that the generated load short circuit monitoring current flows into the first load short circuit monitoring module 204 through the multiplexing pin 13 and the first diode 203 to The first load short-circuit monitoring module 204 compares the inflowing load short-circuit monitoring current with the reference current, and outputs a monitoring signal of the load short-circuit state according to the comparison result. Therefore, the multiplexing pin 13 has the functions of the charging drive pin and the load short-circuit monitoring pin in the prior art, which can reduce the number of pins of the battery protection controller package, thereby reducing the volume and cost.
图4是本发明电池保护控制器中第一负载短路监测模块实施例一的电路图，该实施例的第一负载短路监测模块204包括：第一稳压二极管301、第一电流源304、第一开关管302和第二开关管303，而且，第一开关管302和第二开关管303均为NMOS管。其中，第一开关管302和第二开关管303共栅共源构成电流镜，第一稳压二极管301的阴极连接第一二极管203的阴极，第一稳压二极管301的阳极连接第一开关管302的栅极和漏极，第一开关管302的源极和第二开关管303的源极分别接参考地，第二开关管303的漏极和第一电流源304的一端连接，而且，第二开关管303的漏极为第一负载短路监测模块204的输出端。在该实施例中，第一稳压二极管301的稳压电压例如为12V左右，第一开关管302和第二开关管303的连接方式构成电流镜，且将流过第一稳压二极管301和第一开关管302的电流镜像到第二开关管303中，第一电流源304的电流可以是设置的一个固定电流I0，也可以是第二电流源（例如图7中的第二电流源206）的镜像电流。4 is a circuit diagram of Embodiment 1 of the first load short-circuit monitoring module in the battery protection controller of the present invention. The first load short-circuit monitoring module 204 of this embodiment includes: a first Zener diode 301, a first current source 304, a first The switching tube 302 and the second switching tube 303, and the first switching tube 302 and the second switching tube 303 are both NMOS tubes. Among them, the first switching tube 302 and the second switching tube 303 share a common gate to form a current mirror, the cathode of the first Zener diode 301 is connected to the cathode of the first diode 203, and the anode of the first Zener diode 301 is connected to the first diode. The gate and drain of the switching tube 302, the source of the first switching tube 302 and the source of the second switching tube 303 are respectively connected to the reference ground, and the drain of the second switching tube 303 is connected to one end of the first current source 304, Moreover, the drain of the second switch tube 303 is the output terminal of the first load short-circuit monitoring module 204. In this embodiment, the stabilized voltage of the first Zener diode 301 is, for example, about 12V, and the connection of the first switch tube 302 and the second switch tube 303 constitutes a current mirror, and will flow through the first Zener diode 301 and The current of the first switch tube 302 is mirrored to the second switch tube 303. The current of the first current source 304 can be a set fixed current I0 or a second current source (for example, the second current source 206 in FIG. 7 ) Mirror current.
下面说明该第一负载短路监测模块204的工作原理：在正常工作时，第一充电驱动模块流出一驱动电流，从而将充电开关管105的栅极置为高电位，由于充电开关管的栅极不消耗电流，所以大部分的驱动电流经过第一二极管203流入该第一负载短路监测模块204，此时，该驱动电流经过第一稳压二极管301和第一开关管302到控制器地（电池参考地），所以充电开关管105的栅极电压将会被箝位在一固定值，该固定值为VD203+VD301+VMNTH，其中VD203是第一二极管203的正向压降，一般在0.7V~1V，VD301是第一稳压二极管301的稳压值，例如为12V，VMNTH是第一开关管302的栅极和源极之间的电压。正常情况下，由于低功耗设计，流过第一开关管302的电流很小，流过第二开关管303的电流是第一开关管302的电流镜像，所以也很小，小于第一电流源304的设定电流，所以第二开关管303的漏极为高电平（因为第一电流源304流入的电流大于从第二开关管303流出的电流），即，第一负载短路监测模块204输出一个代表未发生负载短路的高电平信号。The working principle of the first load short-circuit monitoring module 204 will be described below: in normal operation, the first charging drive module flows out a driving current, thereby setting the gate of the charging switch tube 105 to a high potential. No current is consumed, so most of the driving current flows into the first load short-circuit monitoring module 204 through the first diode 203. At this time, the driving current passes through the first Zener diode 301 and the first switch tube 302 to the controller ground. (Battery reference ground), so the grid voltage of the charging switch tube 105 will be clamped to a fixed value, which is VD203+VD301+VMNTH, where VD203 is the forward voltage drop of the first diode 203, Generally, it is between 0.7V and 1V, VD301 is the voltage stabilization value of the first zener diode 301, for example 12V, and VMNTH is the voltage between the gate and the source of the first switch tube 302. Under normal circumstances, due to the low power consumption design, the current flowing through the first switching tube 302 is very small, and the current flowing through the second switching tube 303 is the current mirror image of the first switching tube 302, so it is also very small, less than the first current. The set current of the source 304, so the drain of the second switch tube 303 is high (because the current flowing in the first current source 304 is greater than the current flowing out of the second switch tube 303), that is, the first load short-circuit monitoring module 204 Output a high-level signal indicating that no load short circuit has occurred.
当发生负载短路保护时，负载短路监测电流依次经第二负载短路监测模块113、复用引脚13、第一二极管203、第一稳压二极管301、第一开关管 302流入参考地，由于第一开关管 302上的电流变大，第二开关管303的下拉电流也变大，大于第一电流源304的设定电流，所以第二开关管303的漏极会变成低电压（控制器地），即，第一负载短路监测模块204输出一代表发生负载短路的低电平信号。而当负载短路状态被移除后，就没有额外的电流经过上述途径流入到第二负载短路监测模块204了，那么第二负载短路监测模块204的输出又回到了高电平，从而实现了负载短路状态的监测。When the load short-circuit protection occurs, the load short-circuit monitoring current flows into the reference ground through the second load short-circuit monitoring module 113, the multiplexing pin 13, the first diode 203, the first Zener diode 301, and the first switch tube 302 in sequence. Since the current on the first switch tube 302 becomes larger, the pull-down current of the second switch tube 303 also becomes larger, which is greater than the set current of the first current source 304, so the drain of the second switch tube 303 becomes a low voltage ( Controller ground), that is, the first load short-circuit monitoring module 204 outputs a low-level signal representing the occurrence of a load short-circuit. When the load short-circuit state is removed, no additional current flows into the second load short-circuit monitoring module 204 through the above-mentioned path, and the output of the second load short-circuit monitoring module 204 returns to a high level, thereby realizing the load. Monitoring of short circuit status.
图5是本发明电池保护控制器中负载短路监测模块实施例二的电路图，该实施例的负载短路监测模块204包括第二稳压二极管307、第一电阻305、比较器306，其中，第二稳压二极管307的阴极连接第一二极管203的阳极，第二稳压二极管307的阳极通过第一电阻305接参考地，比较器306的一个输入端输入参考基准电压（Vref0），比较器306的另外一个输入端接第二稳压二极管307的阳极，比较器306的输出端为第一负载短路监测模块的输出端。5 is a circuit diagram of the second embodiment of the load short-circuit monitoring module in the battery protection controller of the present invention. The load short-circuit monitoring module 204 of this embodiment includes a second Zener diode 307, a first resistor 305, and a comparator 306. The second The cathode of the Zener diode 307 is connected to the anode of the first diode 203, and the anode of the second Zener diode 307 is connected to the reference ground through the first resistor 305. One input terminal of the comparator 306 is input with a reference reference voltage (Vref0). The other input terminal of 306 is connected to the anode of the second Zener diode 307, and the output terminal of the comparator 306 is the output terminal of the first load short-circuit monitoring module.
下面说明该第一负载短路监测模块204的工作原理：流入第一负载短路监测模块204的电流经第二稳压二极管307、第一电阻305后到参考地，第一电阻305上的电压为采样电压，比较器306对该采样电压和基准电压Vref0进行比较，正常情况下，由于流入第一负载短路监测模块204的电流很小，第一电阻305上的电压也较小，比较器306的输出为高电平；当发生负载短路时，由于流入第一负载短路监测模块204的电流变大，所以第一电阻305上的电压也上升，比较器306的输出变为低电平；当负载短路解除后，比较器306的输出又重新变为高电平。The working principle of the first load short-circuit monitoring module 204 is described below: the current flowing into the first load short-circuit monitoring module 204 passes through the second Zener diode 307 and the first resistor 305 to the reference ground, and the voltage on the first resistor 305 is sampled The comparator 306 compares the sampled voltage with the reference voltage Vref0. Normally, because the current flowing into the first load short-circuit monitoring module 204 is small, the voltage on the first resistor 305 is also small, and the output of the comparator 306 When the load is short-circuited, since the current flowing into the first load short-circuit monitoring module 204 becomes larger, the voltage on the first resistor 305 also rises, and the output of the comparator 306 becomes low; when the load is short-circuited After the release, the output of the comparator 306 becomes high again.
结合图6及图7，在本发明电池充放电保护电路的实施例二中，电池110为两端电池，即，充电正端（CHG+）与电池正极（PACK+）合为一个端口。该实施例的电池充放电保护电路包括电池保护控制器100、充电开关管105（带有寄生二极管105P）、放电开关管106（带有寄生二极管106P）、第二充电驱动模块114、第二负载短路监测模块113、第二放电驱动模块115以及用于采样放电电流的采样电阻112，而且，充电开关管105和放电开关管106均为NMOS管。电池保护控制器100包括第一充电驱动模块207、第一负载短路监测模块204、第一二极管203、第一放电驱动模块（未示出）和负载短路保护模块（未示出）。第一放电驱动模块用于产生放电开关管的驱动电流信号，负载短路保护模块用于在采样电阻112的电压大于预设值时控制放电开关管106关断。6 and 7, in the second embodiment of the battery charging and discharging protection circuit of the present invention, the battery 110 is a two-terminal battery, that is, the charging positive terminal (CHG+) and the battery positive terminal (PACK+) are combined into one port. The battery charging and discharging protection circuit of this embodiment includes a battery protection controller 100, a charging switch tube 105 (with a parasitic diode 105P), a discharging switch tube 106 (with a parasitic diode 106P), a second charging drive module 114, and a second load The short-circuit monitoring module 113, the second discharge driving module 115, and the sampling resistor 112 for sampling the discharge current, and the charging switch tube 105 and the discharging switch tube 106 are both NMOS tubes. The battery protection controller 100 includes a first charging driving module 207, a first load short-circuit monitoring module 204, a first diode 203, a first discharging driving module (not shown), and a load short-circuit protection module (not shown). The first discharge driving module is used to generate a driving current signal of the discharge switch tube, and the load short-circuit protection module is used to control the discharge switch tube 106 to turn off when the voltage of the sampling resistor 112 is greater than a preset value.
另外，电池保护控制器100的外框设置有电源引脚（BAT4）11、参考地引脚（VSS）12、复用引脚（CHG）13、放电驱动引脚（DSG）14和电流检测引脚（ISEN）15，而且，复用引脚13为一双功能引脚，且分别连接第一充电驱动模块207、第二充电驱动模块114和第二负载短路监测模块113，该复用引脚13还连接第一二极管203的阳极，第一二极管203的阴极连接第一负载短路监测模块204。放电驱动引脚14连接第一放电驱动模块和第二放电驱动模块115。放电开关管106的源极端通过采样电阻112连接电池参考地，放电开关管106的漏极端连接充电开关管105的漏极端，充电开关管105的源极端连接电池负极（PACK-）和充电负端（CHG-）。电池保护控制器100的电流检测引脚15连接放电开关管106的源极端。In addition, the outer frame of the battery protection controller 100 is provided with a power supply pin (BAT4) 11, a reference ground pin (VSS) 12, a multiplexing pin (CHG) 13, a discharge drive pin (DSG) 14 and a current detection pin. Pin (ISEN) 15, and the multiplexing pin 13 is a dual-function pin, and is respectively connected to the first charging drive module 207, the second charging drive module 114 and the second load short-circuit monitoring module 113, the multiplexing pin 13 The anode of the first diode 203 is also connected, and the cathode of the first diode 203 is connected to the first load short-circuit monitoring module 204. The discharge driving pin 14 is connected to the first discharge driving module and the second discharge driving module 115. The source terminal of the discharge switch tube 106 is connected to the battery reference ground through the sampling resistor 112, the drain terminal of the discharge switch tube 106 is connected to the drain terminal of the charge switch tube 105, and the source terminal of the charge switch tube 105 is connected to the battery negative terminal (PACK-) and the negative charging terminal. (CHG-). The current detection pin 15 of the battery protection controller 100 is connected to the source terminal of the discharge switch tube 106.
下面说明各个模块的电路结构：首先，第一负载短路监测模块204的电路结构及工作原理可参照原文所述，在此不做赘述。The circuit structure of each module is described below: First, the circuit structure and working principle of the first load short-circuit monitoring module 204 can be referred to the original text, and will not be repeated here.
第一充电驱动模块207包括第二电流源206和开关202，第二电流源206的一端连接复用引脚13，第二电流源206的另一端通过开关202、电源引脚11连接电池110的正极。而且，通过开关202的开启和关闭控制第二电流源206，继而通过与之耦和的复用引脚13和第二充电驱动模块控制所述充电开关管的开启和关闭。The first charging drive module 207 includes a second current source 206 and a switch 202. One end of the second current source 206 is connected to the multiplexing pin 13, and the other end of the second current source 206 is connected to the battery 110 through the switch 202 and the power supply pin 11. positive electrode. Moreover, the second current source 206 is controlled by turning on and off the switch 202, and then the turning on and off of the charging switch tube is controlled by the multiplexing pin 13 and the second charging drive module coupled with it.
第二充电驱动模块114包括第二电阻104和第三电阻102，而且，第二电阻104的其中一端连接充电开关管105的栅极端，第二电阻104的另外一端连接充电开关管105的源极端。第三电阻102的其中一端连接到复用引脚13，第三电阻102的另外一端连接充电开关管105的栅极端。当然，在其它的实施例中，也可将第三电阻102省去，即，充电开关管105的栅极端直接连接复用引脚13。The second charging drive module 114 includes a second resistor 104 and a third resistor 102, and one end of the second resistor 104 is connected to the gate terminal of the charging switch tube 105, and the other end of the second resistor 104 is connected to the source terminal of the charging switch tube 105 . One end of the third resistor 102 is connected to the multiplexing pin 13, and the other end of the third resistor 102 is connected to the gate terminal of the charging switch tube 105. Of course, in other embodiments, the third resistor 102 can also be omitted, that is, the gate terminal of the charging switch tube 105 is directly connected to the multiplexing pin 13.
第二负载短路监测模块113包括第四电阻101和第二二极管103，第四电阻101的其中一端连接到复用引脚13，第四电阻101的另外一端连接第二二极管103的阴极，第二二极管103的阳极连接到充电开关管105的源极。当然在其它的实施例中，也可将第四电阻101和第二二极管103的位置互换，即，第四电阻101的其中一端连接充电开关管105的源极，第四电阻101的另外一端连接第二二极管103的阳极，第二二极管103的阴极连接到复用引脚13。The second load short-circuit monitoring module 113 includes a fourth resistor 101 and a second diode 103. One end of the fourth resistor 101 is connected to the multiplexing pin 13, and the other end of the fourth resistor 101 is connected to the second diode 103. The cathode and the anode of the second diode 103 are connected to the source of the charging switch tube 105. Of course, in other embodiments, the positions of the fourth resistor 101 and the second diode 103 can also be interchanged, that is, one end of the fourth resistor 101 is connected to the source of the charging switch tube 105, and the fourth resistor 101 The other end is connected to the anode of the second diode 103, and the cathode of the second diode 103 is connected to the multiplexing pin 13.
第二放电驱动模块115包括第五电阻107和第六电阻111，其中，第五电阻107连接在放电开关管106的栅极端和源极端之间，第六电阻111的一端连接放电驱动引脚14，其另一端连接放电开关管106的栅极端。当然，在其它的实施例中，也可将第六电阻111省去，即，放电开关管111的栅极端直接连接放电驱动引脚14。The second discharge drive module 115 includes a fifth resistor 107 and a sixth resistor 111. The fifth resistor 107 is connected between the gate terminal and the source terminal of the discharge switch tube 106, and one end of the sixth resistor 111 is connected to the discharge drive pin 14. , The other end of which is connected to the gate terminal of the discharge switch tube 106. Of course, in other embodiments, the sixth resistor 111 can also be omitted, that is, the gate terminal of the discharge switch tube 111 is directly connected to the discharge drive pin 14.
下面结合图6和图7说明该电池充放电保护电路的工作原理：当电池110进行充电时，控制开关202闭合，第二电流源206通过复用引脚（CHG）13流出一个驱动电流，例如命名为I CHARGE，该驱动电流一般较小，约为10uA，而且，该驱动电流经过第二电阻102将充电开关管105开启。另外，由于第二二极管103是反向偏置的，所以该驱动电流不会流过第四电阻101，第一负载短路监测模块204确保复用引脚13上的最高电压被限制在充电开关管105的V GS(栅极和源极电压之差)安全电压内。同时，第一放电驱动模块也会通过放电驱动引脚14流出一放电驱动电流，该放电驱动电流经过第六电阻111将放电开关管106开启。此时，充电开关管105和放电开关管106均处于导通状态，由于采样电阻112以及充电开关管105与放电开关管106的导通电阻均很小，相当于参考地与电池负极（PACK-）直通，只要在充电正端（CHG+）/电池正极（PACK+）与电池负极（PACK-）之间加上充电电压，便形成了充电通路。 The working principle of the battery charging and discharging protection circuit is described below with reference to FIGS. 6 and 7: When the battery 110 is being charged, the control switch 202 is closed, and the second current source 206 flows out a driving current through the multiplexing pin (CHG) 13, for example Named I CHARGE , the driving current is generally small, about 10 uA, and the driving current passes through the second resistor 102 to turn on the charging switch tube 105. In addition, since the second diode 103 is reverse-biased, the driving current will not flow through the fourth resistor 101, and the first load short-circuit monitoring module 204 ensures that the highest voltage on the multiplexing pin 13 is limited to charging The V GS (the difference between the gate and source voltage) of the switch tube 105 is within the safe voltage. At the same time, the first discharge driving module will also flow a discharge driving current through the discharge driving pin 14, and the discharge driving current will turn on the discharge switch tube 106 through the sixth resistor 111. At this time, the charge switch tube 105 and the discharge switch tube 106 are both in the on state. Because the sampling resistor 112 and the on-resistance of the charge switch tube 105 and the discharge switch tube 106 are all very small, it is equivalent to the reference ground and the battery negative electrode (PACK- ) Straight through, as long as the charging voltage is added between the charging positive terminal (CHG+)/battery positive terminal (PACK+) and the battery negative terminal (PACK-), a charging path is formed.
当电池110进行放电时，同样地，充电开关管105和放电开关管106均处于导通状态，而且，由于采样电阻112以及充电开关管105与放电开关管106的导通电阻均很小，相当于参考地与电池负极（PACK-）直通，而负载连接在电池正极（PACK+）和电池负极（PACK-）之间，所以可形成放电通路。而且，在电池110正常放电时，采样电阻112上的电压高于电池参考地（也是控制器的参考地），但不会超过设定值，电池保护控制器100通过其电流采样引脚15判断采样电压不超过设定值，便不会触发放电开关管106关断。When the battery 110 is discharging, similarly, the charging switch tube 105 and the discharging switch tube 106 are both in the on state, and because the sampling resistor 112 and the on-resistances of the charging switch tube 105 and the discharging switch tube 106 are very small, they are quite small. The reference ground is directly connected to the battery negative pole (PACK-), and the load is connected between the battery positive pole (PACK+) and the battery negative pole (PACK-), so a discharge path can be formed. Moreover, when the battery 110 is normally discharged, the voltage on the sampling resistor 112 is higher than the battery reference ground (also the reference ground of the controller), but does not exceed the set value, and the battery protection controller 100 judges by its current sampling pin 15 If the sampling voltage does not exceed the set value, the discharge switch tube 106 will not be triggered to turn off.
但是，当负载发生短路时，电池保护控制器100通过其电流检测引脚15可检测到采样电阻112上的电压大到超过内部设定值，将会关闭其放电驱动引脚14流出的放电驱动电流，以将放电开关管106的栅极端的电压下拉到电池参考地，所以放电开关管106就立刻就关闭了，此时，电池负极（PACK-）到电池参考地的阻抗变得很大，由于输出负载处于短路状态，电池负极（PACK-）的电压会变大，第二二极管103导通，产生新的负载短路监测电流，例如命名为I SCP_DET，该负载短路监测电流较大，约为100-200uA，而且，该电流经过第二二极管103à第四电阻101à复用引脚13à第一二极管203也流入第一负载短路监测模块204。由于流入第一负载短路监测模块204的电流I SCP_DET+I CHARGE远大于 I CHARGE，所以第一负载短路监测模块204检测到大于I CHARGE的电流，便认为发生了负载短路。 However, when the load is short-circuited, the battery protection controller 100 can detect through its current detection pin 15 that the voltage on the sampling resistor 112 is too large to exceed the internal set value, and will turn off the discharge drive from its discharge drive pin 14 The current is used to pull down the voltage of the gate terminal of the discharge switch tube 106 to the battery reference ground, so the discharge switch tube 106 is immediately turned off. At this time, the impedance from the battery negative (PACK-) to the battery reference ground becomes very large. Since the output load is in a short-circuit state, the voltage of the battery negative terminal (PACK-) will increase, and the second diode 103 will be turned on to generate a new load short-circuit monitoring current, for example named I SCP_DET . The load short-circuit monitoring current is relatively large. It is about 100-200 uA, and the current flows into the first load short-circuit monitoring module 204 through the second diode 103→the fourth resistor 101→the multiplexing pin 13→the first diode 203. Since the current I SCP_DET + I CHARGE flowing into the first load short-circuit monitoring module 204 is much greater than I CHARGE , the first load short-circuit monitoring module 204 detects a current greater than I CHARGE and considers that a load short circuit has occurred.
当负载短路移除后，通过上述路径流入第一负载短路监测模块204的负载短路监测电流重新小于或则等于I CHARGE，才认为负载短路移除，此时，可通过第一放电驱动模块重新产生放电驱动电流，以重新开启放电开关管106。另外，在上述路径上，由于流过电池保护控制器100的复用引脚13的电流不能太大，所以引入第四电阻101进行电流限制，以避免损坏该复用引脚。 After the load short-circuit is removed, the load short-circuit monitoring current flowing into the first load short-circuit monitoring module 204 through the aforementioned path is again less than or equal to I CHARGE , and then the load short-circuit is considered to be removed. At this time, it can be regenerated by the first discharge driving module. The discharge driving current is used to restart the discharge switch tube 106. In addition, in the above path, since the current flowing through the multiplexing pin 13 of the battery protection controller 100 cannot be too large, the fourth resistor 101 is introduced for current limitation to avoid damage to the multiplexing pin.
图8是本发明电池充放电保护电路实施例三的结构示意图，该实施例电池充放电保护电路相比图7所示的电池充放电保护电路，所不同的仅是：第二负载短路监测模块113中的第二二极管103的正极连接放电开关管106的漏极端，其它相同的地方在此不做赘述。8 is a schematic structural diagram of Embodiment 3 of the battery charging and discharging protection circuit of the present invention. Compared with the battery charging and discharging protection circuit shown in FIG. 7 in this embodiment, the only difference is: the second load short-circuit monitoring module The anode of the second diode 103 in 113 is connected to the drain terminal of the discharge switch tube 106, and other similarities are not repeated here.
图9是本发明电池充放电保护电路实施例四的结构示意图，该实施例电池充放电保护电路相比图7所示的电池充放电保护电路，所不同的主要是：充电开关管105A选用P型MOS管（带寄生二极管），而且，充电开关管105A的漏极端连接电池正极，充电开关管105A的源极端连接充电正端（CHG+）。另外，放电开关管106的漏极端直接连接电池负极（PAC-）及充电负端（CHG-）。Figure 9 is a schematic structural diagram of the fourth embodiment of the battery charging and discharging protection circuit of the present invention. Compared with the battery charging and discharging protection circuit of this embodiment, the main difference is that the charging switch 105A uses P Type MOS tube (with parasitic diode), and the drain terminal of the charging switch tube 105A is connected to the positive terminal of the battery, and the source terminal of the charging switch tube 105A is connected to the charging positive terminal (CHG+). In addition, the drain terminal of the discharge switch tube 106 is directly connected to the battery negative terminal (PAC-) and the negative charging terminal (CHG-).
另外，第一充电驱动模块207A包括第二电流源206A和开关202A，第二电流源206A的其中一端连接第一二极管203A的阳极及开关202A的一端，开关202的另一端连接复用引脚，第一二极管203A的阴极连接第二负载短路监测模块204。当然，在其它的实施例中，也可将第一二极管203A的阳极直接连接复用引脚13。In addition, the first charging drive module 207A includes a second current source 206A and a switch 202A. One end of the second current source 206A is connected to the anode of the first diode 203A and one end of the switch 202A, and the other end of the switch 202 is connected to the multiplexer. Pin, the cathode of the first diode 203A is connected to the second load short-circuit monitoring module 204. Of course, in other embodiments, the anode of the first diode 203A can also be directly connected to the multiplexing pin 13.
第二负载短路监测模块113A包括第三电阻101A和第二二极管103A，其中，第三电阻101A的其中一段连接复用引脚13，第三电阻101A的另一段连接第二二极管103A的阴极，第二二极管103A的阳极连接放电开关管106的漏极。The second load short-circuit monitoring module 113A includes a third resistor 101A and a second diode 103A, wherein one section of the third resistor 101A is connected to the multiplexing pin 13, and the other section of the third resistor 101A is connected to the second diode 103A The cathode of the second diode 103A is connected to the drain of the discharge switch tube 106.
应理解，该实施例的电池充放电保护电路与图7所示的电池充放电保护电路的工作原理类似，在此不做赘述。It should be understood that the working principle of the battery charging and discharging protection circuit of this embodiment is similar to that of the battery charging and discharging protection circuit shown in FIG. 7, and will not be repeated here.
图10是本发明电池充放电保护电路实施例五的结构示意图，该实施例相比图7所示的实施例所不同的主要是：电池110为三端电池，该电池充放电保护电路还包括第三二极管115，该第三二极管115的负极连接电池正极（PAC+），第三二极管115的正极连接充电正端（CHG+）。10 is a schematic structural diagram of Embodiment 5 of the battery charging and discharging protection circuit of the present invention. Compared with the embodiment shown in FIG. 7, this embodiment is different mainly in that the battery 110 is a three-terminal battery, and the battery charging and discharging protection circuit also includes A third diode 115, the cathode of the third diode 115 is connected to the battery anode (PAC+), and the anode of the third diode 115 is connected to the positive charging terminal (CHG+).
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何纂改、等同替换、改进等，均应包含在本发明的权利要求范围之内。The foregoing descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

  1. 一种电池保护控制器，用于通过第二充电驱动模块对充电开关管的通断进行控制，及在发生负载短路保护时通过第二负载短路监测模块产生负载短路监测电流以监测负载短路状态是否解除，所述电池保护控制器包括用于产生充电开关管的驱动电流信号的第一充电驱动模块，以及，用于将流入的负载短路监测电流和参考电流进行比较，并根据比较结果输出负载短路状态的监测信号的第一负载短路监测模块，其特征在于，所述电池保护控制器包括第一二极管及设置于外框的复用引脚，所述复用引脚分别连接第一充电驱动模块、第二充电驱动模块和第二负载短路监测模块，所述复用引脚还连接所述第一二极管的阳极，所述第一二极管的阴极连接所述第一负载短路监测模块。A battery protection controller is used to control the on-off of the charging switch tube through the second charging drive module, and generate load short-circuit monitoring current through the second load short-circuit monitoring module when load short-circuit protection occurs to monitor whether the load short-circuit state Released, the battery protection controller includes a first charging driving module for generating a driving current signal for the charging switch tube, and for comparing the inflowing load short-circuit monitoring current with a reference current, and outputting the load short-circuit according to the comparison result The first load short-circuit monitoring module of the state monitoring signal is characterized in that the battery protection controller includes a first diode and multiplexing pins arranged on the outer frame, and the multiplexing pins are respectively connected to the first charging The driving module, the second charging driving module and the second load short-circuit monitoring module, the multiplexing pin is also connected to the anode of the first diode, and the cathode of the first diode is connected to the first load to short-circuit Monitoring module.
  2. 根据权利要求1所述的电池保护控制器，其特征在于，所述第一负载短路监测模块包括：第一稳压二极管、第一电流源、第一开关管和第二开关管，其中，所述第一开关管和第二开关管共栅共源构成电流镜，所述第一稳压二极管的阴极连接所述第一二极管的阴极，所述第一稳压二极管的阳极连接所述第一开关管的栅极和漏极，所述第二开关管的漏极和所述第一电流源的一端连接，而且，所述第二开关管的漏极为所述第一负载短路监测模块的输出端。The battery protection controller according to claim 1, wherein the first load short-circuit monitoring module comprises: a first Zener diode, a first current source, a first switch tube, and a second switch tube, wherein The first switching tube and the second switching tube share a common gate to form a current mirror, the cathode of the first Zener diode is connected to the cathode of the first diode, and the anode of the first Zener diode is connected to the The gate and drain of the first switch tube, the drain of the second switch tube is connected to one end of the first current source, and the drain of the second switch tube is the first load short-circuit monitoring module The output terminal.
  3. 根据权利要求1所述的电池保护控制器，其特征在于，所述第一负载短路监测模块包括：第二稳压二极管、第一电阻和一个比较器；其中，所述第二稳压二极管的阴极连接所述第一二极管的阳极，所述第二稳压二极管的阳极通过所述第一电阻接参考地，所述比较器的一个输入端输入参考基准电压，所述比较器的另外一个输入端接所述第二稳压二极管的阳极，所述比较器的输出端为所述第一负载短路监测模块的输出端。The battery protection controller according to claim 1, wherein the first load short-circuit monitoring module comprises: a second zener diode, a first resistor and a comparator; wherein the second zener diode The cathode is connected to the anode of the first diode, the anode of the second Zener diode is connected to the reference ground through the first resistor, one input terminal of the comparator inputs a reference reference voltage, and the other of the comparator One input terminal is connected to the anode of the second Zener diode, and the output terminal of the comparator is the output terminal of the first load short-circuit monitoring module.
  4. 根据权利要求1所述的电池保护控制器，其特征在于，所述第一充电驱动模块包括第二电流源和开关，通过所述开关的开启和关闭控制所述第二电流源，继而通过与之耦和的所述复用引脚和所述第二充电驱动模块控制所述充电开关管的开启和关闭。The battery protection controller according to claim 1, wherein the first charging drive module includes a second current source and a switch, and the second current source is controlled by turning on and off the switch, and then The coupled multiplexing pin and the second charging drive module control the opening and closing of the charging switch tube.
  5. 一种电池充放电保护电路，包括充电开关管、第二充电驱动模块和第二负载短路监测模块，其特征在于，还包括权利要求1-4任一项所述的电池保护控制器。A battery charging and discharging protection circuit, comprising a charging switch tube, a second charging drive module, and a second load short-circuit monitoring module, and is characterized in that it further comprises the battery protection controller according to any one of claims 1-4.
  6. 根据权利要求5所述的电池充放电保护电路，其特征在于，所述第二充电驱动模块包括第二电阻，而且，所述第二电阻的其中一端连接所述充电开关管的栅极端，所述第二电阻的另外一端连接所述充电开关管的源极端。The battery charging and discharging protection circuit according to claim 5, wherein the second charging drive module comprises a second resistor, and one end of the second resistor is connected to the gate terminal of the charging switch tube, so The other end of the second resistor is connected to the source terminal of the charging switch tube.
  7. 根据权利要求6所述的电池充放电保护电路，其特征在于，所述第二充电驱动模块包括第三电阻，而且，所述第三电阻的其中一端连接到所述复用引脚，所述第三电阻的另外一端连接所述充电开关管的栅极端。The battery charging and discharging protection circuit according to claim 6, wherein the second charging and driving module includes a third resistor, and one end of the third resistor is connected to the multiplexing pin, the The other end of the third resistor is connected to the gate terminal of the charging switch tube.
  8. 根据权利要求5所述的电池充放电保护电路，其特征在于，所述第二负载短路监测模块包括第四电阻和第二二极管，所述第四电阻的其中一端连接到所述复用引脚，所述第四电阻的另外一端连接第二二极管的阴极，所述第二二极管的阳极连接到充电开关管的源极端。The battery charging and discharging protection circuit of claim 5, wherein the second load short-circuit monitoring module comprises a fourth resistor and a second diode, one end of the fourth resistor is connected to the multiplexer Pin, the other end of the fourth resistor is connected to the cathode of the second diode, and the anode of the second diode is connected to the source terminal of the charging switch tube.
  9. 根据权利要求5所述的电池充放电保护电路，其特征在于，所述第二负载短路监测模块包括第四电阻和第二二极管，所述第四电阻的其中一端连接到所述复用引脚，所述第四电阻的另外一端连接第二二极管的阴极，所述第二二极管的阳极连接到充电开关管的漏极端。The battery charging and discharging protection circuit of claim 5, wherein the second load short-circuit monitoring module comprises a fourth resistor and a second diode, one end of the fourth resistor is connected to the multiplexer Pin, the other end of the fourth resistor is connected to the cathode of the second diode, and the anode of the second diode is connected to the drain terminal of the charging switch.
  10. 根据权利要求5所述的电池充放电保护电路，其特征在于，所述充电开关管为N型MOS管或P型MOS管。The battery charging and discharging protection circuit of claim 5, wherein the charging switch tube is an N-type MOS tube or a P-type MOS tube.
PCT/CN2020/099399 2019-07-16 2020-06-30 Battery protection controller and battery charging and discharging protection circuit WO2021008357A1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112803545A (en) * 2021-02-04 2021-05-14 欣旺达电动汽车电池有限公司 Battery protection circuit
CN117134300A (en) * 2023-09-06 2023-11-28 南京模砾半导体有限责任公司 Circuit for preventing short-circuit current from damaging MOSFET
CN117335534A (en) * 2023-12-01 2024-01-02 广东采日能源科技有限公司 Battery charge-discharge short-circuit protection and sampling circuit

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110380474B (en) * 2019-07-16 2020-12-08 深圳市菱奇半导体有限公司 Battery protection controller and battery charge-discharge protection circuit
CN111123073B (en) * 2019-12-27 2022-05-10 天津芯海创科技有限公司 Quick self-checking device of hardware board card
CN112531818B (en) * 2020-11-20 2023-06-16 芜湖华沅微电子有限公司 Ultra-compact four-string lithium battery protection chip and peripheral circuit
CN112636409B (en) * 2020-12-09 2023-08-15 维沃移动通信有限公司 Battery charging circuit and electronic equipment

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105515096A (en) * 2015-12-08 2016-04-20 无锡中感微电子股份有限公司 Battery protection circuit and system thereof
CN105576777A (en) * 2016-03-09 2016-05-11 山东汉旗科技有限公司 Battery protection system
CN107086628A (en) * 2017-05-22 2017-08-22 安徽师范大学 It is a kind of that system is protected by light-coupled isolation software and hardware cooperating novel lithium battery group
EP3382845A1 (en) * 2017-03-31 2018-10-03 Delta Electronics, Inc. Intelligent uninterruptible power charging apparatus and method of operating the same
CN110380474A (en) * 2019-07-16 2019-10-25 深圳市菱奇半导体有限公司 Battery protection controller and battery charge/discharge protection circuit

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203243071U (en) * 2013-03-21 2013-10-16 飞毛腿电子（深圳）有限公司 Power supply charging and discharging circuit and mobile power supply
CN104868450B (en) * 2015-05-29 2017-06-27 河南森源重工有限公司 A kind of lithium battery group short-circuit protection circuit
CN206673631U (en) * 2017-03-30 2017-11-24 合肥华耀电子工业有限公司 A kind of battery charger
CN206908325U (en) * 2017-05-22 2018-01-19 安徽师范大学 It is a kind of that system is protected by light-coupled isolation software and hardware cooperating novel lithium battery group

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105515096A (en) * 2015-12-08 2016-04-20 无锡中感微电子股份有限公司 Battery protection circuit and system thereof
CN105576777A (en) * 2016-03-09 2016-05-11 山东汉旗科技有限公司 Battery protection system
EP3382845A1 (en) * 2017-03-31 2018-10-03 Delta Electronics, Inc. Intelligent uninterruptible power charging apparatus and method of operating the same
CN107086628A (en) * 2017-05-22 2017-08-22 安徽师范大学 It is a kind of that system is protected by light-coupled isolation software and hardware cooperating novel lithium battery group
CN110380474A (en) * 2019-07-16 2019-10-25 深圳市菱奇半导体有限公司 Battery protection controller and battery charge/discharge protection circuit

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112803545A (en) * 2021-02-04 2021-05-14 欣旺达电动汽车电池有限公司 Battery protection circuit
CN112803545B (en) * 2021-02-04 2024-02-13 欣旺达动力科技股份有限公司 Battery protection circuit
CN117134300A (en) * 2023-09-06 2023-11-28 南京模砾半导体有限责任公司 Circuit for preventing short-circuit current from damaging MOSFET
CN117134300B (en) * 2023-09-06 2024-03-15 南京模砾半导体有限责任公司 Circuit for preventing short-circuit current from damaging MOSFET
CN117335534A (en) * 2023-12-01 2024-01-02 广东采日能源科技有限公司 Battery charge-discharge short-circuit protection and sampling circuit
CN117335534B (en) * 2023-12-01 2024-03-19 广东采日能源科技有限公司 Battery charge-discharge short-circuit protection and sampling circuit

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