A battery pack control circuit and system with charging and discharging same

Abstract

The utility model provides a kind of battery pack control circuit and system of charge-discharge same mouth, the battery pack control circuit of charge-discharge same mouth includes charging switch circuit, discharging switch circuit, charge-discharge port, MCU controller, charge-discharge drive circuit and ideal diode controller circuit;The input end of the charging switch circuit is connected with the anode of the charge-discharge port, the output end of the charging switch circuit is connected with the anode of battery pack, and the control end of the charging switch circuit is connected with the output end of the charge-discharge drive circuit and the output end of the ideal diode controller circuit;The input end of the discharging switch circuit is connected with the anode of battery pack, and the output end of the discharging switch circuit is connected with the anode of the charge-discharge port, and the control end of the discharging switch circuit is connected with the output end of the charge-discharge drive circuit;The signal output end of the MCU controller is connected with the input end of the charge-discharge drive circuit;Realize battery pack charge-discharge same mouth parallel use.

Description

Technical Field

[0001] This utility model belongs to the field of battery management technology, specifically relating to a battery pack control circuit and system with a charging and discharging port. Background Technology

[0002] There are two main ways to use existing rechargeable battery packs in parallel: Method 1: Parallel connection is achieved through an external ideal diode or a Schottky diode power distribution parallel device. This device is an external device outside the battery pack, which is expensive and can only achieve unidirectional discharge. It cannot charge the battery pack through this port.

[0003] Method 2: The battery pack discharge port integrates an ideal diode to achieve the function of parallel connection without backflow charging. However, the discharge port can only discharge and cannot charge. Charging requires a separate charging port. The battery pack can only be in the form of separate charging and discharging ports. The charging port can only charge and the discharge port can only discharge. It cannot achieve intelligent switching. Moreover, the two ports have two sets of circuits, resulting in high material costs and complex hardware design.

[0004] In summary, the existing technical solutions described above cannot realize the scenario of parallel application of battery pack charging and discharging at the same port. Summary of the Invention

[0005] To address the shortcomings of the prior art, this utility model provides a battery pack control circuit and system with a single charging and discharging port, enabling parallel use of the charging and discharging ports of the battery pack, while intelligently controlling the charging switch circuit, so that the battery pack has only one external charging and discharging port.

[0006] In one aspect, this utility model provides a battery pack control circuit with a charging and discharging port, including a charging switch circuit, a discharging switch circuit, a charging and discharging port, an MCU controller, a charging and discharging drive circuit, and an ideal diode controller circuit. The input terminal of the charging switch circuit is connected to the positive terminal of the charging / discharging port, the output terminal of the charging switch circuit is connected to the positive terminal of the battery pack, and the control terminal of the charging switch circuit is connected to the output terminal of the charging / discharging drive circuit and the output terminal of the ideal diode controller circuit. The input terminal of the discharge switch circuit is connected to the positive terminal of the battery pack, the output terminal of the discharge switch circuit is connected to the positive terminal of the charging / discharging port, and the control terminal of the discharge switch circuit is connected to the output terminal of the charging / discharging drive circuit. The signal output terminal of the MCU controller is connected to the input terminal of the charge / discharge drive circuit.

[0007] In some implementations, the charging switch circuit includes a first MOSFET, a second MOSFET, a third MOSFET, and a fourth MOSFET; The first MOS transistor, the second MOS transistor, the third MOS transistor, and the fourth MOS transistor share a common source, drain, and gate. The source is connected to the positive terminal of the charging / discharging port, the drain is connected to the positive terminal of the battery pack, and the gate is connected to the output terminal of the charging / discharging drive circuit and the output terminal of the ideal diode controller circuit.

[0008] In some implementations, the charging switch circuit further includes a discharge voltage regulator unit; The discharge voltage regulator unit is disposed between the drain and the gate.

[0009] In some implementations, the discharge voltage regulator unit includes a first Zener diode and a first resistor; One end of the first Zener diode and the first resistor connected in parallel is connected to the drain, and the other end is connected to the gate.

[0010] In some implementations, the charge / discharge drive circuit includes a charging drive unit and a discharging drive unit; The input terminal of the charging drive unit is connected to the signal output terminal of the MCU controller, and the output terminal of the charging drive unit is connected to the control terminal of the charging switch circuit. The input terminal of the discharge drive unit is connected to the signal output terminal of the MCU controller, and the output terminal of the discharge drive unit is connected to the control terminal of the discharge switch circuit.

[0011] In some implementations, the charging drive unit includes a first transistor, a fifth MOSFET, and a first diode; The base of the first transistor is connected to the first signal pin of the MCU controller, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to the gate of the fifth MOS transistor. The source of the fifth MOSFET is connected to the AFE interface of the MCU controller, the drain of the fifth MOSFET is connected to the input terminal of the first diode, and the output terminal of the first diode is connected to the control terminal of the charging switch circuit.

[0012] In some implementations, the discharge driving unit includes a second transistor, a third transistor, and a second diode; The base of the second transistor is connected to the first signal pin of the MCU controller, the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the base of the third transistor. The emitter of the third transistor is connected to the AFE interface of the MCU controller, and the collector of the third transistor is connected to the input terminal of the second diode; The output terminal of the second diode is connected to the control terminal of the discharge switch circuit.

[0013] In some implementations, the ideal diode controller circuit includes a first chip and a third diode; The fourth pin of the first chip is connected to the output terminal of the charging switch circuit, the fifth pin of the first chip is connected to the input terminal of the third diode, and the sixth pin of the first chip is connected to the input terminal of the charging switch circuit. The output terminal of the third diode is connected to the control terminal of the charging switch circuit.

[0014] In some implementations, the discharge switch circuit includes a sixth MOS transistor, a seventh MOS transistor, an eighth MOS transistor, and a ninth MOS transistor; The sixth, seventh, eighth, and ninth MOSFETs share a common source, drain, and gate. The source is connected to the positive terminal of the battery pack, the drain is connected to the positive terminal of the charging / discharging port, and the gate is connected to the output terminal of the charging / discharging drive circuit.

[0015] On the other hand, the present invention provides a system including a battery pack and a battery pack control circuit with a charging and discharging port as described in any of the above claims. The positive terminal of the battery pack is connected to the output terminal of the charging switch circuit and the input terminal of the discharging switch circuit, and the negative terminal of the battery pack is connected to the negative terminal of the charging / discharging port.

[0016] In summary, this utility model has at least the following advantages: 1. This utility model provides a battery pack control circuit with a simultaneous charging and discharging port. By setting an ideal diode controller circuit to realize the function of an ideal diode, when the charging switch circuit is controlled by the ideal diode controller circuit, the charging switch circuit can only pass external discharge current and cannot pass internal charging current. Once internal charging current occurs, the ideal diode controller circuit will control the charging switch circuit to close. This method allows the battery pack to be used for parallel discharge at the same port. At the same time, the charging switch circuit is also controlled by the charging and discharging drive circuit. When the battery pack needs to be charged, whether the whole system is plugged into the charger or the battery pack is removed for separate charging, the MCU intelligent software inside the battery pack communicates and exchanges charging information with the charger or the whole system. When the charging conditions meet the requirements, the MCU controller controls the charging switch circuit to open for charging through the charging and discharging drive circuit.

[0017] 2. The system provided by this utility model uses a battery pack control circuit with the same charging and discharging port to realize the function of parallel discharge and charging of battery packs with the same port. It is multi-purpose and is no longer limited to the previous parallel port of battery packs that can only discharge and not charge. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the battery pack control circuit provided in Embodiment 1 of this utility model; Figure 2 This is a connection diagram of the battery pack control circuit provided in Embodiment 2 of this utility model; Figure 3 This is a connection diagram of the charging switch circuit provided in Embodiment 2 of this utility model; Figure 4 This is a connection diagram of the charging drive unit provided in Embodiment 2 of this utility model; Figure 5 This is a connection diagram of the discharge drive unit provided in Embodiment 2 of this utility model; Figure 6 This is a connection diagram of the ideal diode controller circuit provided in Embodiment 2 of this utility model; Figure 7 This is a connection diagram of the discharge switch circuit provided in Embodiment 2 of this utility model; Figure 8 This is a schematic diagram of the system provided in Embodiment 3 of the present invention; Marked in the image: 10. Battery pack control circuit; 100. Charging switch circuit; 200. Discharge switch circuit; 300. Charging / discharging port; 400. MCU controller; 500. Charge / discharge drive circuit; 510. Charge drive unit; 520. Discharge drive unit; 600. Ideal diode controller circuit; 700, battery pack; 20. System. Detailed Implementation

[0019] To facilitate understanding of the present invention, a more comprehensive description will be given below in conjunction with the accompanying drawings and specific embodiments. The drawings illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of the invention.

[0020] Please refer to the diagrams, where the same component symbols represent the same components. The principles of this application are illustrated by way of example implementation in a suitable computing environment. The following description is based on the specific embodiments of this application exemplified, and should not be construed as limiting other specific embodiments not detailed herein.

[0021] As used herein, the term "module" can refer to a software or hardware object that executes on the computing system. The various components, modules, engines, and services described herein can be implementations on the computing system. The apparatuses and methods described herein can be implemented in software or hardware, both of which are within the scope of this application.

[0022] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly. For example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections, electrical connections, or connections that allow communication between them; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two components or interactive relationships between two components.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0025] Example 1: Please see Figure 1 A battery pack control circuit 10 with a charging and discharging port includes a charging switch circuit 100, a discharging switch circuit 200, a charging and discharging port 300, an MCU controller 400, a charging and discharging drive circuit 500, and an ideal diode controller circuit 600.

[0026] The charging switch circuit 100 controls the on / off state of the internal switch, directly determining whether the charging current can flow to the battery pack, thus avoiding ineffective or dangerous charging. The discharging switch circuit 200 controls the on / off state of the internal switch, directly determining whether the battery pack outputs current to the load, thus avoiding ineffective discharging or dangerous power supply. The charging / discharging port 300 is used to connect to the charger or load to charge or discharge the battery pack. The MCU controller 400 controls the charging / discharging drive circuit 500 to drive the charging switch circuit 100 or the discharging switch circuit 200 to turn on and off, based on actual charging or discharging requirements. The ideal diode controller circuit 600 implements the function of an ideal diode. When the charging switch circuit 100 is controlled by the ideal diode controller circuit 600, the charging switch circuit 100 can only accept external discharge current and cannot accept internal charging current. Once internal charging current occurs, the ideal diode controller circuit 600 will control the charging switch circuit 100 to turn off. This control method allows the battery pack to be discharged in parallel through the same port.

[0027] Specifically, the input terminal of the charging switch circuit 100 is connected to the positive terminal of the charging / discharging port 300, the output terminal of the charging switch circuit 100 is connected to the positive terminal of the battery pack, and the control terminal of the charging switch circuit 100 is connected to the output terminal of the charging / discharging drive circuit 500 and the output terminal of the ideal diode controller circuit 600; the input terminal of the discharging switch circuit 200 is connected to the positive terminal of the battery pack, the output terminal of the discharging switch circuit 200 is connected to the positive terminal of the charging / discharging port 300, and the control terminal of the discharging switch circuit 200 is connected to the output terminal of the discharging drive circuit; the signal output terminal of the MCU controller 400 is connected to the input terminal of the charging / discharging drive circuit 500.

[0028] When the charging switch circuit 100 is controlled by the ideal diode controller circuit 600, the charging switch circuit 100 can only pass external discharge current and cannot pass internal charging current. Once internal charging current occurs, the ideal diode controller circuit 600 will control the charging switch circuit 100 to turn off. This method allows the battery pack to be used for parallel discharge at the same port. At the same time, the charging switch circuit 100 is also controlled by the charge and discharge drive circuit 500. When the battery pack needs to be charged, the whole system 20 is plugged into the charger or the battery pack is removed for separate charging. The MCU intelligent software inside the battery pack communicates and exchanges charging information with the charger or the whole system 20. When the charging conditions meet the requirements, the MCU controller 400 controls the charging switch circuit 100 to open for charging through the charge and discharge drive circuit 500.

[0029] In actual operation, when the battery pack is in parallel and external discharge is stopped, the external system 20 has a charger plugged in, and the information exchange between the battery pack and the system 20 is normal. According to the software preset program, the MCU controller 400 controls the charging switch circuit 100 to turn on through the charging and discharging drive circuit 500 to start charging.

[0030] When the battery pack is removed for separate charging, the protocol charger is inserted into the battery pack. After the battery pack and charger are connected via protocol, the information exchange is normal. According to the software settings, the MCU controller 400 drives the charging switch to turn on and start charging.

[0031] Example 2: This embodiment is a further optimization based on Embodiment 1. Please refer to the following: Figure 1 Based on the above Figures 2-7 .

[0032] In this embodiment, the charging switch circuit 100 includes a first MOSFET Q1, a second MOSFET Q2, a third MOSFET Q3, and a fourth MOSFET Q4.

[0033] Among them, the first MOSFET Q1, the second MOSFET Q2, the third MOSFET Q3 and the fourth MOSFET Q4 share a common source, drain and gate. The source is connected to the positive terminal of the charge / discharge port 300, the drain is connected to the positive terminal of the battery pack, and the gate is connected to the output terminal of the charge / discharge drive circuit 500 and the output terminal of the ideal diode controller circuit 600.

[0034] Driven by the charging and discharging drive circuit 500, the charging switch circuit 100 is turned on, that is, the first MOSFET Q1, the second MOSFET Q2, the third MOSFET Q3 and the fourth MOSFET Q4 are turned on, so that the charging current can charge the battery pack internally.

[0035] When the charging switch circuit 100 is controlled by the ideal diode controller circuit 600, the charging switch circuit 100 can only pass the external discharge current and cannot pass the inward charging current. Once the inward charging current occurs, the ideal diode controller circuit 600 will control the charging switch circuit 100 to turn off.

[0036] In some embodiments, the charging switch circuit 100 further includes a discharge voltage regulator unit; the discharge voltage regulator unit is disposed between the drain and the gate, and is used to stabilize the output voltage that fluctuates with the power consumption during the discharge of the battery pack to a fixed and precise voltage required by the load, while taking into account power supply efficiency and safety protection, so as to ensure that the load can work stably and reliably during the discharge process of the battery pack throughout its entire life cycle.

[0037] Specifically, the discharge voltage regulator unit includes a first Zener diode ZD1 and a first resistor R1; one end of the first Zener diode ZD1 and the first resistor R1 connected in parallel is connected to the drain of the first MOSFET Q1, the second MOSFET Q2, the third MOSFET Q3 and the fourth MOSFET Q4, and the other end is connected to the gate of the first MOSFET Q1, the second MOSFET Q2, the third MOSFET Q3 and the fourth MOSFET Q4.

[0038] In some embodiments, the charge / discharge drive circuit 500 includes a charge drive unit 510 and a discharge drive unit 520; the input terminal of the charge drive unit 510 is connected to the signal output terminal of the MCU controller 400, and the output terminal of the charge drive unit 510 is connected to the control terminal of the charge switch circuit 100; the input terminal of the discharge drive unit 520 is connected to the signal output terminal of the MCU controller 400, and the output terminal of the discharge drive unit 520 is connected to the control terminal of the discharge switch circuit 200.

[0039] The charging drive unit 510 and the discharging drive unit 520 are configured to drive and control the charging switch circuit 100 and the discharging switch circuit 200 respectively, thereby improving the accuracy of control.

[0040] Furthermore, the charging drive unit 510 includes a first transistor Q11, a fifth MOSFET Q5, and a first diode D1.

[0041] In this circuit, the base of the first transistor Q11 is connected to the first signal pin oDChg of the MCU controller 400, the emitter of the first transistor Q11 is grounded, and the collector of the first transistor Q11 is connected to the gate of the fifth MOSFET Q5. The source of the fifth MOSFET Q5 is connected to the AFE interface of the MCU controller 400, the drain of the fifth MOSFET Q5 is connected to the input terminal of the first diode D1, and the output terminal of the first diode D1 is connected to the control terminal of the charging switch circuit 100.

[0042] When the MCU controller 400 controls the charging drive unit 510 to work, the ideal diode controller circuit 600 is not working, and the output of the first diode D1 is a high level to drive the charging switch circuit 100 to conduct. When the ideal diode controller circuit 600 is working, the MCU controller 400 controls the charging drive unit 510 to not work, and the output of the ideal diode controller circuit 600 is a high level to drive the charging switch circuit 100 to conduct. Since the charging drive unit 510 is separated by the first diode D1, the high level output of the ideal diode controller circuit 600 will not affect the MCU controller 400's control of the charging drive unit 510.

[0043] Furthermore, the discharge drive unit 520 includes a second transistor Q12, a third transistor Q13, and a second diode D2.

[0044] In this circuit, the base of the second transistor Q12 is connected to the first signal pin oDChg of the MCU controller 400, the emitter of the second transistor Q12 is grounded, and the collector of the second transistor Q12 is connected to the base of the third transistor Q13. The emitter of the third transistor Q13 is connected to the AFE interface of the MCU controller 400, and the collector of the third transistor Q13 is connected to the input terminal of the second diode D2. The output terminal of the second diode D2 is connected to the control terminal of the discharge switch circuit 200.

[0045] When the MCU controller 400 controls the discharge drive unit 520 to work, the output of the second diode D2 outputs a high level to drive the discharge switch circuit 200 to turn on.

[0046] In some implementations, the ideal diode controller circuit 600 includes a first chip U1 and a third diode D3.

[0047] The fourth pin of the first chip U1 is connected to the output terminal of the charging switch circuit 100, the fifth pin of the first chip U1 is connected to the input terminal of the third diode D3, the sixth pin of the first chip U1 is connected to the input terminal of the charging switch circuit 100, and the output terminal of the third diode D3 is connected to the control terminal of the charging switch circuit 100.

[0048] The ideal diode controller circuit 600 controls the conduction and cutoff of the charging switch circuit 100 through the fifth pin of the first chip U1. The fourth and sixth pins of the first chip U1 detect the voltage level across the charging switch circuit 100. When forward conduction is achieved, the fifth pin of the first chip U1 controls the charging switch circuit 100 to conduct. When reverse voltage is applied, the fifth pin of the first chip U1 controls the charging switch circuit 100 to cut off, thus achieving unidirectional conduction.

[0049] When the ideal diode controller circuit 600 is working, the output of the third diode D3 is high, driving the charging switch circuit 100 to conduct. Since the charging drive unit 510 is separated by the first diode D1, the high level output of the ideal diode controller circuit 600 will not affect the MCU controller 400's control of the charging drive unit 510. Similarly, when the MCU controller 400 controls the charging drive unit 510 to work, the ideal diode controller circuit 600 is not working, and the output of the first diode D1 is high, driving the charging switch circuit 100 to conduct. Since the ideal diode controller circuit 600 is separated by the third diode D3, the high level of the first diode D1 will not affect the first chip U1.

[0050] In some implementations, the discharge switch circuit 200 includes a sixth MOSFET Q6, a seventh MOSFET Q7, an eighth MOSFET Q8, and a ninth MOSFET Q9. Among them, the sixth MOSFET Q6, the seventh MOSFET Q7, the eighth MOSFET Q8 and the ninth MOSFET Q9 share a common source, drain and gate. The source is connected to the positive terminal of the battery pack, the drain is connected to the positive terminal of the charging / discharging port 300, and the gate is connected to the output terminal of the charging / discharging drive circuit 500.

[0051] Driven by the charge / discharge drive circuit 500, the discharge switch circuit 200 is turned on, that is, the sixth MOSFET Q6, the seventh MOSFET Q7, the eighth MOSFET Q8 and the ninth MOSFET Q9 are turned on, so that the discharge current can supply power to the load.

[0052] Example 3: This embodiment makes further structural optimizations based on Embodiment 1. Please refer to... Figures 1-7 Based on the above Figure 8 .

[0053] On the other hand, the present invention provides a system including a battery pack 700 and a battery pack control circuit 10 with a charging and discharging port as described in Embodiment 1 or Embodiment 2 above.

[0054] The positive terminal of the battery pack 700 is connected to the output terminal of the charging switch circuit 100 and the input terminal of the discharging switch circuit 200, and the negative terminal of the battery pack 700 is connected to the negative terminal of the charging / discharging port 300.

[0055] The above description is merely an example and illustration of the structure of this invention, and while the description is specific and detailed, it should not be construed as limiting the scope of this invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this invention, and these obvious substitutions all fall within the protection scope of this invention.

Claims

1. A battery pack control circuit with a simultaneous charging and discharging port, characterized in that, This includes a charging switch circuit, a discharging switch circuit, a charging / discharging port, an MCU controller, a charging / discharging drive circuit, and an ideal diode controller circuit. The input terminal of the charging switch circuit is connected to the positive terminal of the charging / discharging port, the output terminal of the charging switch circuit is connected to the positive terminal of the battery pack, and the control terminal of the charging switch circuit is connected to the output terminal of the charging / discharging drive circuit and the output terminal of the ideal diode controller circuit. The input terminal of the discharge switch circuit is connected to the positive terminal of the battery pack, the output terminal of the discharge switch circuit is connected to the positive terminal of the charging / discharging port, and the control terminal of the discharge switch circuit is connected to the output terminal of the charging / discharging drive circuit. The signal output terminal of the MCU controller is connected to the input terminal of the charge / discharge drive circuit.

2. The battery pack control circuit with a charging and discharging port according to claim 1, characterized in that, The charging switch circuit includes a first MOSFET, a second MOSFET, a third MOSFET, and a fourth MOSFET; The first MOS transistor, the second MOS transistor, the third MOS transistor, and the fourth MOS transistor share a common source, drain, and gate. The source is connected to the positive terminal of the charging / discharging port, the drain is connected to the positive terminal of the battery pack, and the gate is connected to the output terminal of the charging / discharging drive circuit and the output terminal of the ideal diode controller circuit.

3. The battery pack control circuit with a charging and discharging port according to claim 2, characterized in that, The charging switch circuit also includes a discharge voltage regulator unit; The discharge voltage regulator unit is disposed between the drain and the gate.

4. The battery pack control circuit with a charging and discharging port according to claim 3, characterized in that, The discharge voltage regulation unit includes a first Zener diode and a first resistor; One end of the first Zener diode and the first resistor connected in parallel is connected to the drain, and the other end is connected to the gate.

5. The battery pack control circuit with a charging and discharging port according to claim 1, characterized in that, The charging and discharging driving circuit includes a charging driving unit and a discharging driving unit; The input terminal of the charging drive unit is connected to the signal output terminal of the MCU controller, and the output terminal of the charging drive unit is connected to the control terminal of the charging switch circuit. The input terminal of the discharge drive unit is connected to the signal output terminal of the MCU controller, and the output terminal of the discharge drive unit is connected to the control terminal of the discharge switch circuit.

6. The battery pack control circuit with a charging and discharging port according to claim 5, characterized in that, The charging drive unit includes a first transistor, a fifth MOSFET, and a first diode; The base of the first transistor is connected to the first signal pin of the MCU controller, the emitter of the first transistor is grounded, and the collector of the first transistor is connected to the gate of the fifth MOS transistor. The source of the fifth MOSFET is connected to the AFE interface of the MCU controller, the drain of the fifth MOSFET is connected to the input terminal of the first diode, and the output terminal of the first diode is connected to the control terminal of the charging switch circuit.

7. The battery pack control circuit with a charging and discharging port according to claim 5, characterized in that, The discharge drive unit includes a second transistor, a third transistor, and a second diode; The base of the second transistor is connected to the first signal pin of the MCU controller, the emitter of the second transistor is grounded, and the collector of the second transistor is connected to the base of the third transistor. The emitter of the third transistor is connected to the AFE interface of the MCU controller, and the collector of the third transistor is connected to the input terminal of the second diode; The output terminal of the second diode is connected to the control terminal of the discharge switch circuit.

8. The battery pack control circuit with a charging and discharging port according to claim 6, characterized in that, The ideal diode controller circuit includes a first chip and a third diode; The fourth pin of the first chip is connected to the output terminal of the charging switch circuit, the fifth pin of the first chip is connected to the input terminal of the third diode, and the sixth pin of the first chip is connected to the input terminal of the charging switch circuit. The output terminal of the third diode is connected to the control terminal of the charging switch circuit.

9. The battery pack control circuit with a charging and discharging port according to claim 1, characterized in that, The discharge switch circuit includes a sixth MOSFET, a seventh MOSFET, an eighth MOSFET, and a ninth MOSFET; The sixth, seventh, eighth, and ninth MOSFETs share a common source, drain, and gate. The source is connected to the positive terminal of the battery pack, the drain is connected to the positive terminal of the charging / discharging port, and the gate is connected to the output terminal of the charging / discharging drive circuit.

10. A system, characterized in that, Includes a battery pack and a battery pack control circuit with a charging / discharging port as described in any one of claims 1-9; The positive terminal of the battery pack is connected to the output terminal of the charging switch circuit and the input terminal of the discharging switch circuit, and the negative terminal of the battery pack is connected to the negative terminal of the charging / discharging port.

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