Ideal diode circuit and battery management system

Abstract

The utility model relates to the technical field of battery management, and discloses an ideal diode circuit and a battery management system, and the ideal diode circuit comprises a current collection module which is connected between the negative electrode of a battery interface and the negative electrode of a charging interface and is used for collecting current; one end of the operational amplifier module is connected between the cathode of the battery interface and the current acquisition module, and the other end of the operational amplifier module is connected between the current acquisition module and the cathode of the charging interface; the input end of the MOS driving module is connected with the operational amplification module and the current acquisition module, and the output end of the MOS driving module is connected with the negative electrode of the charging interface; wherein the operational amplification module amplifies and processes an acquisition signal of the current acquisition module, and controls the MOS driving module to act. By designing the current acquisition module, the operational amplification module and the MOS driving module, after the mode is adopted to replace a power diode, the occupied space is compact, and the overall design cost is low.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of battery management, and particularly relates to an ideal diode circuit and a battery management system. BACKGROUND

[0002] A battery management system (BATTERY MANAGEMENT SYSTEM) is an electronic system for monitoring and managing the performance of a battery pack. Specifically, it is used to monitor and protect the charging, discharging, temperature, current and other parameters of the battery. Generally speaking, a small charging current is used to protect the battery and avoid overcharging and overheating, thereby prolonging the service life of the battery. A large discharging current may be used to meet the power demand of equipment, such as electric vehicles and drones, which require a large discharging current to provide power.

[0003] In the prior art, under the premise of ensuring the stability and reliability of the battery management system, the customer and the development end will adopt a split design, that is, by managing the charging and discharging separately, appropriate components can be selected according to different requirements, thereby reducing the overall system cost. To meet the application scenarios of the split BMS in charging and discharging, and the 0-voltage of the charging port, the conventional method is to add a power diode to the charging port.

[0004] The power diode in the above method generates a certain voltage drop when it is turned on, resulting in power loss. If the charging current is greater than 3A in the application scenario, the power loss of the power diode will increase significantly, causing the diode to heat up. Therefore, additional cooling measures such as heat sinks or fans are needed, which will increase the overall volume and design complexity of the battery management system. For battery management systems with limited space, the conventional method of adding a power diode cannot meet the space requirements.

[0005] In addition, high-current rated power diodes are usually more expensive and require additional cooling solutions, further increasing the overall cost.

[0006] Therefore, in the application scenario where the charging current is greater than 3A, the method of adding a power diode to the charging port poses challenges to the space and cost factors of the battery management system. Based on these two difficulties, the power diode is no longer suitable for high-current application scenarios. CONTENT OF THE INVENTION

[0007] To solve the problems of the prior art, the application provides an ideal diode circuit. By designing a current acquisition module, an operational amplifier module and a MOS drive module, the space occupied is compact, and the overall design cost is low after replacing the power diode with this method.

[0008] The technical effects achieved by the application are as follows:

[0009] In a first aspect, the application provides an ideal diode circuit connected between a battery interface and a charging interface, a positive pole of the charging interface being connected to a positive pole of the battery interface, comprising:

[0010] a current collection module connected between a negative pole of the battery interface and a negative pole of the charging interface, for collecting current;

[0011] an operational amplification module, one end of which is connected between the negative pole of the battery interface and the current collection module, and the other end of which is connected between the current collection module and the negative pole of the charging interface; and

[0012] a MOS drive module, an input end of which is connected to the operational amplification module and the current collection module, and an output end of which is connected to the negative pole of the charging interface;

[0013] wherein the operational amplification module amplifies and processes a collection signal of the current collection module, and controls the MOS drive module to act.

[0014] In some implementations, the current collection module comprises a current detection resistor RN3 connected between the negative pole of the battery interface and the negative pole of the charging interface.

[0015] In some implementations, the operational amplification module comprises:

[0016] a differential voltage amplification unit, input ends of which are connected to both ends of the current collection module, and

[0017] a voltage comparison unit, input ends of which are respectively connected to an output end of the differential voltage amplification unit and a ground, and an output end of the voltage comparison unit being connected to the MOS drive module.

[0018] In some implementations, the differential voltage amplification unit comprises:

[0019] a differential voltage amplification element U1, a positive input end of which is connected between the negative pole of the battery interface and the current collection module, and a negative input end of which is connected between the current collection module and the negative pole of the charging interface, for amplifying a voltage difference between both ends of the current collection module; and

[0020] a feedback resistor R10 connected between an output end of the differential voltage amplification element U1 and the voltage comparison unit.

[0021] In some implementations, the voltage comparison unit comprises:

[0022] a voltage comparison element U2, a positive input end of which is connected to the feedback resistor R10, and a negative input end of which is connected to the ground; and

[0023] a feedback resistor R12 connected between the output of the voltage comparison element U2 and the MOS drive module.

[0024] In some implementations, the MOS drive module includes:

[0025] a first MOS unit having a control terminal connected to the operational amplifier module, and having an input terminal connected to ground;

[0026] a second MOS unit having a control terminal connected to an output terminal of the first MOS unit, and having an input terminal connected to a positive terminal of the battery interface; and

[0027] a third MOS unit having a control terminal connected to an output terminal of the second MOS unit, and having an input terminal connected to the current collection module, and having an output terminal connected to a negative terminal of the charging interface.

[0028] In some implementations, the first MOS unit includes:

[0029] an N-channel transistor Q2 having a control terminal connected to an output terminal of the operational amplifier module, having an input terminal connected to ground, and having an output terminal connected to the second MOS unit;

[0030] a resistor R19 connected between the control terminal of the N-channel transistor Q2 and the output terminal of the operational amplifier module, and connected between the input terminal of the N-channel transistor Q2 and ground; and

[0031] a resistor R14 connected between the output terminal of the N-channel transistor Q2 and the second MOS unit.

[0032] In some implementations, the second MOS unit includes:

[0033] an NPN transistor Q1 having a control terminal connected to the first MOS unit, having an input terminal connected to the positive terminal of the battery interface, and having an output terminal connected to the third MOS unit; and

[0034] a resistor R1 connected between the control terminal of the NPN transistor Q1 and the input terminal of the NPN transistor Q1.

[0035] In some implementations, the third MOS unit includes:

[0036] a power transistor Q6, a control terminal of which is connected with the second MOS unit, an input terminal of the power transistor Q6 is connected with the output terminal of the current collection module, and an output terminal of the power transistor Q6 is connected with the negative electrode of the charging interface;

[0037] a resistor R36 connected between the second MOS unit and the control terminal of the power transistor Q6;

[0038] a resistor R46 connected between the control terminal of the power transistor Q6 and the input terminal of the power transistor Q6, and

[0039] a voltage stabilizing diode ZD5 connected in parallel with the resistor R46.

[0040] In a second aspect, the application provides a battery management system, which comprises a protection module, and the protection module is provided with an ideal diode circuit.

[0041] The ideal diode circuit adopts the ideal diode circuit as described above.

[0042] In summary, the application has at least the following advantages:

[0043] 1. The ideal diode circuit provided by the application, by designing a current collection module, an operational amplifier module and a MOS driving module, when the current collection module detects that the charging current is greater than 250mA, the operational amplifier module controls the MOS driving module to be turned on, otherwise to be turned off, so as to realize the 0V function of the charging port in the case that the MOS driving module is turned off. This method does not need to use a power diode, so it does not need additional cooling measures, and because of the high efficiency of the MOS tube in the MOS driving module, a smaller radiator or even a radiator can be used in the design, thereby saving physical space, and further ensuring the overall compactness of the battery management system, thereby improving the available space of the BMS. At the same time, there is no need to pay for expensive high-current power diodes, and there is no need to provide additional cooling solutions, so the overall cost is relatively low.

[0044] 2. The ideal diode circuit provided by the application, because the MOS tube in the MOS driving module has a low on-resistance, it can carry a larger current in the same volume. This makes the charging circuit capable of supporting a higher charging current, effectively improving the overcurrent capability of the charging circuit and meeting the demand for fast charging. And it reduces the risk of component failure due to overheating, enhances the reliability and stability of the system. BRIEF DESCRIPTION OF DRAWINGS

[0045] Figure 1 FIG. 1 is a structural schematic diagram of an ideal diode circuit in Embodiment 1 of the application.

[0046] Figure 2Another structure diagram of the ideal diode circuit in Embodiment 1 of the present application.

[0047] Figure 3 A structure diagram of the ideal diode circuit in Embodiment 2 of the present application.

[0048] Figure 4 A structure diagram of the battery management system in Embodiment 3 of the present application.

[0049] Markings in the figure:

[0050] C+, positive pole of the charging interface, B+, positive pole of the battery interface, C-, negative pole of the charging interface;

[0051] 100, ideal diode circuit, 1, current collection module; 2, operational amplification module, 21, differential amplification unit, 22, voltage comparison unit; 3, MOS drive module, 31, first MOS unit, 32, second MOS unit, 33, third MOS unit;

[0052] 200, protection module;

[0053] 300, battery management system. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. The described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application.

[0055] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts fall within the scope of protection of the present application.

[0056] Embodiment 1:

[0057] Please refer to the drawings Figure 1 - the drawings Figure 2 An ideal diode circuit of the present application is connected between the battery interface and the charging interface, the positive pole C+ of the charging interface is connected with the positive pole B+ of the battery interface, and includes a current collection module 1, an operational amplification module 2 and a MOS drive module 3.

[0058] The current acquisition module 1 is connected between the negative pole B- of the battery interface and the negative pole C- of the charging interface, and is used for acquiring the current. Specifically, the current acquisition module 1 comprises a current detection resistor RN3 connected between the negative pole B- of the battery interface and the negative pole C- of the charging interface. The current detection resistor RN3 is responsible for converting the analog signal of the charging current into a voltage analog signal, and then detecting and processing the signal through the operational amplifier module 2. Preferably, the resistance value of the current detection resistor RN3 is 20 milliohms.

[0059] One end of the operational amplifier module 2 is connected between the negative pole B- of the battery interface and the current acquisition module 1, and the other end of the operational amplifier module 2 is connected between the current acquisition module 1 and the negative pole C- of the charging interface.

[0060] The MOS drive module 3 has an input end connected with the operational amplifier module 2 and the current acquisition module 1, and has an output end connected with the negative pole C- of the charging interface.

[0061] The operational amplifier module 2 amplifies and processes the acquisition signal of the current acquisition module 1, and controls the MOS drive module 3 to act.

[0062] The ideal diode circuit 100 in the embodiment can output a high level when the current detection resistor RN3 in the current acquisition module 1 detects that the charging current is greater than 250 mA, and can control the MOS drive module 3 to be turned on, otherwise, the MOS drive module 3 is turned off, so as to realize the charging port 0 voltage function in the case that the MOS drive module 3 is turned off. This method avoids using the method of increasing the power diode in the case of large current, so that no additional cooling measures are needed, and because of the high efficiency of the MOS tube in the MOS drive module 3, a smaller radiator or even a radiator can be used in the design, thereby saving physical space, and further ensuring that the overall volume of the battery management system 300 is compact, and the available space of the BMS is correspondingly improved. At the same time, there is no need to pay for expensive high-current power diodes, and there is no need to provide additional cooling solutions, so that the overall cost is relatively low.

[0063] In addition, in this structure, because the MOS tube in the MOS drive module 3 has a low on-resistance, it can carry a larger current in the same volume. This makes the charging circuit capable of supporting a higher charging current, effectively improving the overcurrent capability of the charging circuit and meeting the demand for fast charging. Moreover, the risk of component failure caused by overheating is reduced, effectively enhancing the reliability and stability of the system.

[0064] Embodiment 2:

[0065] The difference between this embodiment and embodiment 1 is that, as shown in Figure 3 The operational amplifier module 2 in this embodiment comprises a differential pressure amplification unit 21 and a voltage comparison unit 22.

[0066] The input end of the differential amplifier unit 21 is connected to both ends of the current collection module 1. Specifically, the differential amplifier unit 21 includes a differential amplifier element U1 and a feedback resistor R10. Preferably, the model of the differential amplifier element U1 is TP2121. The positive input end of the differential amplifier element U1 is connected between the negative pole B- of the battery interface and the current collection module 1, and the negative input end of the differential amplifier element U1 is connected between the current collection module 1 and the negative pole C- of the charging interface, for amplifying the voltage difference between both ends of the current collection module 1. The feedback resistor R10 is connected between the output end of the differential amplifier element U1 and the voltage comparison unit 22.

[0067] Through the above setting, the two input voltages are input to the positive input end and the negative input end of the differential amplifier element U1, and the difference between them is amplified. Then, the gain is set through the feedback resistor R10, and the difference of the input signal is amplified to the required output level for the subsequent circuit to process.

[0068] The input end of the voltage comparison unit 22 is connected to the output end of the differential amplifier unit 21 and the ground, respectively, and the output end of the voltage comparison unit 22 is connected to the MOS drive module 3. Specifically, the voltage comparison unit 22 includes a voltage comparison element U2 and a feedback resistor R12. The positive input end of the voltage comparison element U2 is connected to the feedback resistor R10, and the negative input end of the voltage comparison element U2 is connected to the ground. The feedback resistor R12 is connected between the output end of the voltage comparison element U2 and the MOS drive module 3. Preferably, the model of the voltage comparison element U2 is TP2121.

[0069] Through the above setting of the voltage comparison unit 22, when it is detected that the voltage of the negative input end of the voltage comparison element U2 is greater than the voltage of the positive input end, the high level of the output end of the voltage comparison element U2 is output, thereby controlling the subsequent MOS drive module 3.

[0070] The operational amplifier module 2 in the embodiment amplifies the voltage difference detected by the positive input end and the negative input end of the differential amplifier element U1 by 200 times and outputs it from the output end to the voltage comparison unit 22. When it is detected that the voltage of the negative input end of the voltage comparison element U2 is greater than the voltage of the positive input end, the high level of the output end of the voltage comparison element U2 is output, thereby controlling the subsequent MOS drive module 3. This mode can ensure the precision and sensitivity of voltage difference detection and amplification, and the design is simple, which is conducive to the subsequent control of the MOS drive module 3.

[0071] In some embodiments, the MOS drive module 3 includes a first MOS unit 31, a second MOS unit 32, and a third MOS unit 33.

[0072] The control end of the first MOS unit 31 is connected with the operational amplification module 2, and the input end of the first MOS unit 31 is connected with the ground. Specifically, the first MOS unit 31 comprises an N-channel transistor Q2, a resistor R19 and a resistor R14. The control end of the N-channel transistor Q2 is connected with the output end of the operational amplification module 2, the input end of the N-channel transistor Q2 is connected with the ground, and the output end of the N-channel transistor Q2 is connected with the second MOS unit 32. One end of the resistor R19 is connected between the control end of the N-channel transistor Q2 and the output end of the operational amplification module 2, and the other end of the resistor R19 is connected between the input end of the N-channel transistor Q2 and the ground. The resistor R14 is connected between the output end of the N-channel transistor Q2 and the second MOS unit 32. Preferably, the model of the N-channel transistor Q2 is 2N7002K.

[0073] The control end of the second MOS unit 32 is connected with the output end of the first MOS unit 31, and the input end of the second MOS unit 32 is connected with the positive pole B+ of the battery interface. Specifically, the second MOS unit 32 comprises an NPN transistor Q1 and a resistor R1. The control end of the NPN transistor Q1 is connected with the first MOS unit 31, the input end of the NPN transistor Q1 is connected with the positive pole B+ of the battery interface, and the output end of the NPN transistor Q1 is connected with the third MOS unit 33. The resistor R1 is connected between the control end of the NPN transistor Q1 and the input end of the NPN transistor Q1. Preferably, the model of the NPN transistor Q1 is MMBT5401.

[0074] The control end of the third MOS unit 33 is connected with the output end of the second MOS unit 32, the input end of the third MOS unit 33 is connected with the current collection module 1, and the output end of the third MOS unit 33 is connected with the negative pole C- of the charging interface. Specifically, the third MOS unit 33 comprises a power transistor Q6, a resistor R36, a resistor R46 and a voltage stabilizing diode ZD5. The control end of the power transistor Q6 is connected with the second MOS unit 32, the input end of the power transistor Q6 is connected with the output end of the current collection module 1, and the output end of the power transistor Q6 is connected with the negative pole C- of the charging interface. The resistor R36 is connected between the second MOS unit 32 and the control end of the power transistor Q6. The resistor R46 is connected between the control end of the power transistor Q6 and the input end of the power transistor Q6. The voltage stabilizing diode ZD5 is connected in parallel with the resistor R46. Preferably, the model of the power transistor Q6 is SW050R95E8S.

[0075] The MOS drive module 3 in the embodiment is in an open state when the charging current collected by the current collection module 1 is greater than 250 mA, and is in a closed state when the charging current collected by the current collection module 1 is less than or equal to 250 mA. The 0-voltage function of the charging port is realized when the power transistor Q6 is in the closed state. Due to the high efficiency of the transistor, a smaller heat sink or even no heat sink can be used in the design, thereby saving physical space and ensuring the overall compactness of the battery management system 300, and accordingly improving the available space of the BMS. The risk of component failure caused by overheating is reduced, and the reliability and stability of the system are enhanced. At the same time, there is no need to pay for expensive high-current power diodes, and there is no need to provide an additional heat dissipation scheme, so that the overall cost is relatively low.

[0076] In addition, due to the low on-resistance of the transistor, a larger current can be carried in the same volume, so that the charging circuit can support a higher charging current, enhance the overcurrent capability of the charging circuit, and meet the demand for fast charging.

[0077] Embodiment 3:

[0078] Based on the above-mentioned embodiments, the battery management system 300 is provided, which comprises the protection module 200 provided with the ideal diode circuit 100. Figure 4 The ideal diode circuit 100 adopts the ideal diode circuit 100 as described above.

[0079] In the battery management system 300 in the embodiment, the ideal diode circuit 100 is used to replace the power diode in the application scenario where the charging current is greater than 3 A. The ideal diode circuit 100 collects the current by using the current collection module 1 and converts the analog signal into a voltage analog signal, then detects and amplifies the signal by using the operational amplifier module 2, and controls the transistor of the MOS drive module 3 to be opened or closed. The 0-voltage function of the charging port is realized when the power transistor Q6 is in the closed state. Due to the high efficiency of the MOS drive module 3, a smaller heat sink or even no heat sink can be used in the design, thereby saving physical space and ensuring the overall compactness of the battery management system 300, and accordingly improving the available space of the BMS. The risk of component failure caused by overheating is reduced, and the reliability and stability of the battery management system 300 are enhanced.

[0080] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0081] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0082] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0083] In this application, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" a first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" a first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0084] Although the description of this application has been made in conjunction with the specific embodiments described above, it is obvious to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. An ideal diode circuit connected between a battery interface and a charging interface, a positive terminal of the charging interface being connected to a positive terminal of the battery interface, characterized in that, include: A current acquisition module is connected between the negative terminal of the battery interface and the negative terminal of the charging interface to acquire current. An operational amplifier module, one end of which is connected between the negative terminal of the battery interface and the current acquisition module, and the other end of which is connected between the current acquisition module and the negative terminal of the charging interface; and The MOS driver module has its input terminal connected to the operational amplifier module and the current acquisition module, and its output terminal connected to the negative terminal of the charging interface. The operational amplifier module amplifies and processes the acquisition signal from the current acquisition module, and controls the operation of the MOS drive module.

2. The ideal diode circuit of claim 1, wherein, The current acquisition module includes a current sensing resistor RN3, which is connected between the negative terminal of the battery interface and the negative terminal of the charging interface.

3. The ideal diode circuit of claim 1, wherein, The operational amplifier module includes: The differential pressure amplification unit has its input terminal connected to both ends of the current acquisition module, and The voltage comparator unit has its input terminals connected to the output terminal of the differential voltage amplifier unit and ground, respectively, and its output terminal is connected to the MOS driver module.

4. The ideal diode circuit of claim 3, wherein, The differential pressure amplification unit includes: A differential voltage amplifier U1 has its positive input terminal connected between the negative terminal of the battery interface and the current acquisition module, and its negative input terminal connected between the current acquisition module and the negative terminal of the charging interface, for amplifying the voltage difference across the current acquisition module; and The feedback resistor R10 is connected between the output terminal of the differential voltage amplifier element U1 and the voltage comparison unit.

5. The ideal diode circuit of claim 4, wherein, The voltage comparison unit includes: Voltage comparator U2, its positive input terminal is connected to the feedback resistor R10, and its negative input terminal is grounded; and The feedback resistor R12 is connected between the output terminal of the voltage comparator U2 and the MOS drive module.

6. The ideal diode circuit of claim 1, wherein, The MOS driving module includes: The first MOS unit has its control terminal connected to the operational amplifier module, and its input terminal is connected to ground. The second MOS unit has its control terminal connected to the output terminal of the first MOS unit, and its input terminal connected to the positive terminal of the battery interface; and The third MOS unit has its control terminal connected to the output terminal of the second MOS unit, its input terminal connected to the current acquisition module, and its output terminal connected to the negative terminal of the charging interface.

7. The ideal diode circuit of claim 6, wherein, The first MOS unit includes: The N-channel transistor Q2 has its control terminal connected to the output terminal of the operational amplifier module, its input terminal grounded, and its output terminal connected to the second MOS unit. Resistor R19 has one end connected between the control terminal of the N-channel transistor Q2 and the output terminal of the operational amplifier module, and the other end connected between the input terminal of the N-channel transistor Q2 and ground; and Resistor R14 is connected between the output terminal of the N-channel transistor Q2 and the second MOS unit.

8. The ideal diode circuit of claim 6, wherein, The second MOS unit includes: an NPN transistor Q1, a control terminal of which is connected with the first MOS unit, an input terminal of the NPN transistor Q1 is connected with the positive pole of the battery interface, and an output terminal of the NPN transistor Q1 is connected with the third MOS unit; and a resistor R1, which is connected between the control terminal of the NPN transistor Q1 and the input terminal of the NPN transistor Q1.

9. The ideal diode circuit of claim 6, wherein, The third MOS unit comprises: a power transistor Q6, a control terminal of which is connected with the second MOS unit, an input terminal of the power transistor Q6 is connected with the output terminal of the current collection module, and an output terminal of the power transistor Q6 is connected with the negative pole of the charging interface; a resistor R36, which is connected between the second MOS unit and the control terminal of the power transistor Q6; a resistor R46, which is connected between the control terminal of the power transistor Q6 and the input terminal of the power transistor Q6, and a voltage stabilizing diode ZD5, which is connected in parallel with the resistor R46.

10. A battery management system, characterized by, The protection module comprises an ideal diode circuit. The ideal diode circuit is the ideal diode circuit according to any one of claims 1-9.

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