A wake-up control device and its circuit applied to a battery management system

Abstract

The present invention provides a wake-up control device and its circuit for a battery management system, which relates to the technical field of battery management. In this wake-up control device, the system wake-up control module includes at least one module or a combination of multiple modules among a key switch, a reset wake-up module, a working wake-up module, an over-discharge wake-up module, and a forced charging wake-up module, and is used to perform wake-up control on the battery management system. Among them, the working wake-up module is used to wake up the battery management system when the current of the battery pack meets the first preset condition; the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack meets the second preset condition. This technical solution can monitor the battery status and wake up the battery management system in a pure hardware wake-up manner, so that the battery management system can stop battery power supply in time to prevent damage caused by complete depletion of the battery.

Description

Technical Field

[0001] The present invention relates to the technical field of battery management, and in particular to a wake-up control device and a circuit thereof applied to a battery management system. Background Art

[0002] With the vigorous development of new energy technologies, electric vehicles and other new energy vehicles are becoming more and more popular. The battery performance of electrically driven vehicles greatly affects the quality of the vehicle. In order to prevent the battery from being overcharged and discharged and affecting its service life, a battery management system (BMS) is usually used to monitor the battery status in real time. However, since the BMS itself also has power consumption, if it is always in the on state, it will also deplete the power stored in the battery, causing the battery to be over-discharged, damaging the battery and affecting its service life. Therefore, when the vehicle is not in driving state for a long time, the BMS is generally put into a dormant state. At present, when the BMS is in a dormant state, it is awakened by pure hardware through the vehicle key switch or forced charging. The awakening method is relatively simple, and before the BMS is awakened, when the battery is in a state such as being damp, it will also consume power. There is no corresponding pure hardware awakening method to monitor the battery status and wake up the BMS in time. The BMS cannot stop the battery power supply in time, which is easy to cause the battery to be completely exhausted and damaged. Summary of the invention

[0003] In view of the defects of the prior art, the purpose of the present invention is to provide a wake-up control device and circuit applied to a battery management system, which can monitor the battery status and wake up the battery management system in time through a pure hardware wake-up method, so that the battery management system stops the battery power supply in time to prevent the battery from being completely exhausted and causing damage, thereby achieving the effect of protecting the battery and extending the service life.

[0004] The present invention provides a wake-up control device for a battery management system, comprising a battery pack, a battery management system and a relay, wherein the battery pack, the battery management system and the relay are electrically connected to each other;

[0005] The battery management system includes a MOS switch, a current sampling module, a system wake-up control module, a power control module and an MCU control strategy module, wherein:

[0006] The output end of the battery pack is electrically connected to the first end of the relay, and the input end of the battery pack is electrically connected to the second end of the current sampling module;

[0007] The first end of the current sampling module is electrically connected to the second end of the MOS switch, and the third end of the current sampling module is electrically connected to the system wake-up control module and the MCU control strategy module respectively, for performing current and voltage sampling of the battery pack and the external power supply;

[0008] The system wake-up control module is electrically connected to the power control module, the MCU control strategy module, and the output terminal of the battery pack respectively, and is used to control the power control module to supply power to the MCU control strategy module when the charging and discharging process of the battery pack does not belong to a preset working condition, so that the MCU control strategy module controls the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack;

[0009] The power control module is electrically connected to the MCU control strategy module and the output terminal of the battery pack respectively, and is used to supply power to the MCU control strategy module;

[0010] The MCU control strategy module is electrically connected to the second end of the relay, and the third end of the MOS switch is electrically connected to the MCU control strategy module, and is used to control the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack;

[0011] The system wake-up control module includes at least one module or a combination of multiple modules among a key switch, a reset wake-up module, a working wake-up module, an over-discharge wake-up module, and a forced charging wake-up module, and is used to perform wake-up control on the battery management system, so that the power control module provides electrical energy to the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack;

[0012] The working wake-up module is used to wake up the battery management system when the current of the battery pack satisfies a first preset condition; the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack satisfies a second preset condition.

[0013] Further, the system wake-up control module includes the working wake-up module;

[0014] When the discharge current of the battery pack exceeds a first preset threshold or the charging current exceeds a second preset threshold, the working wake-up module wakes up the battery management system.

[0015] Further, the system wake-up control module includes the over-discharge wake-up module and the forced charging wake-up module; when the open-circuit voltage of the battery pack is less than a third preset threshold, the over-discharge wake-up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack;

[0016] When an external power supply is connected, the forced charging wake-up module wakes up the battery management system, so that the battery pack is charged to turn on the external output of the battery pack.

[0017] Further, the system wake-up control module includes the working wake-up module, the over-discharge wake-up module, and the forced charging wake-up module;

[0018] When the discharge current of the battery pack exceeds a first preset threshold or the charging current exceeds a second preset threshold, the working wake-up module wakes up the battery management system;

[0019] When the open-circuit voltage of the battery pack is less than a third preset threshold, the over-discharge wake-up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack;

[0020] When an external power supply is connected, the forced charging wake-up module wakes up the battery management system, causing the battery pack to charge to turn on the external output of the battery pack.

[0021] Further, the system wake-up control module includes the key switch, the reset wake-up module, the working wake-up module, the over-discharge wake-up module, and the forced charging wake-up module;

[0022] When there is an input from an external key switch or an input from the reset button of the battery pack, the key switch and the reset wake-up module wake up the battery management system;

[0023] When the discharge current of the battery pack exceeds a first preset threshold or the charging current exceeds a second preset threshold, the working wake-up module wakes up the battery management system;

[0024] When the open-circuit voltage of the battery pack is less than a third preset threshold, the over-discharge wake-up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack;

[0025] When an external power supply is connected, the forced charging wake-up module wakes up the battery management system, causing the battery pack to charge to turn on the external output of the battery pack.

[0026] The present invention also provides a wake-up control circuit applied to a battery management system for implementing the above-mentioned wake-up control device applied to a battery management system.

[0027] Further, the working wake-up module is implemented by the following circuit elements;

[0028] The circuit components include operational amplifiers U5A, U5B, U7A, U7B, comparators U8A, U8B, resistors R1, R3, R8, R9, R10, R13, R16, R18, R22, R24, R25, R26, R27, R28, R30, R31, R35, R41, R42, R44, R46, R47, capacitors C24, C26, C28, C29, C30, C35, C36, C37, C38, C41, C42, C43, C44, C45;

[0029] The first end of the resistor R26 is connected to the bus current. The second end of the resistor R26 is respectively connected to the first end of the capacitor C36, the first end of the resistor R24, and the third end of the operational amplifier U5A. The second ends of the capacitor C36 and the resistor R24 are respectively grounded. The first end of the resistor R28 is connected to the reference current. The second end of the resistor R28 is respectively connected to the first end of the capacitor C37, the first end of the resistor R30, and the second end of the operational amplifier U5A. The fourth end of the operational amplifier U5A is grounded. The fifth end of the operational amplifier U5A is connected to the battery pack. The first end of the operational amplifier U5A is respectively connected to the second end of the capacitor C37, the second end of the resistor R30, and the first end of the resistor R25. The second end of the resistor R25 is respectively connected to the first end of the capacitor C35, the first end of the resistor R22, and the fifth end of the operational amplifier U5B. The first end of the resistor R27 is grounded. The second end of the resistor R27 is respectively connected to the first end of the capacitor C38, the first end of the resistor R31, and the sixth end of the operational amplifier U5B. The seventh end of the operational amplifier U5B is respectively connected to the second end of the capacitor C38, the second end of the resistor R31, and the first end of the resistor R35. The second end of the R35 is respectively connected to the first end of the capacitor C30 and the third end of the comparator U8A. The second end of the capacitor C30 is grounded. The first end of the capacitor C30 is connected to the third end of the comparator U8A. The second end of the comparator U8A and the first end of the capacitor C26 are respectively connected to the reference current. The fourth end of the comparator U8A, the second end of the capacitor C26, and the first end of the capacitor C24 are respectively grounded. The first end of the comparator U8A is respectively connected to the second end of the capacitor C24, the first end of the resistor R46, and the second end of the resistor R41. The first end of the resistor R41 and the fifth end of the comparator U8A are connected to the battery pack. The second end of the resistor R46 is connected to the power control module;

[0030] The first end of the resistor R10 is connected to the reference current. The second end of the resistor R10 is respectively connected to the first end of the capacitor C29, the first end of the resistor R8, and the third end of the operational amplifier U7A. The second ends of the capacitor C29 and the resistor R8 are respectively grounded. The first end of the resistor R42 is connected to the bus current. The second end of the resistor R42 is respectively connected to the first end of the capacitor C41, the first end of the resistor R44, and the second end of the operational amplifier U7A. The fourth end of the operational amplifier U7A is grounded. The fifth end of the operational amplifier U7A is connected to the battery pack. The first end of the operational amplifier U7A is respectively connected to the second end of the capacitor C41, the second end of the resistor R44, and the first end of the resistor R9. The second end of the resistor R9 is respectively connected to the first end of the capacitor C28, the first end of the resistor R3, and the fifth end of the operational amplifier U7B. The first end of the resistor R18 is grounded. The second end of the resistor R18 is respectively connected to the first end of the capacitor C42, the first end of the resistor R47, and the sixth end of the operational amplifier U7B. The seventh end of the operational amplifier U7B is respectively connected to the second end of the capacitor C42, the second end of the resistor R47, and the first end of the resistor R13. The second end of the R13 is respectively connected to the first end of the capacitor C43 and the fifth end of the comparator U8B. The second end of the capacitor C43 is grounded. The first end of the capacitor C43 is connected to the fifth end of the comparator U8B. The sixth end of the comparator U8B and the first end of the capacitor C45 are respectively connected to the reference current. The second ends of the capacitor C45 and the capacitor C44 are respectively grounded. The seventh end of the comparator U8B is respectively connected to the second end of the capacitor C44, the first end of the resistor R16, and the second end of the resistor R1. The first end of the resistor R1 is connected to a 6V voltage. The second end of the resistor R16 is connected to the power control module.

[0031] Further, the over-discharge wake-up module is implemented by the following circuit elements;

[0032] The circuit elements include a resistor R43, a resistor R45, a resistor R48, a resistor R49, a resistor R53, a capacitor C25, a capacitor C27, a zener diode D11, and a comparator U6B;

[0033] The first end of the resistor R48 is connected to the battery voltage. The second end of the resistor R48 is respectively connected to the first end of the capacitor C27, the first end of the resistor R53, the first end of the voltage regulator diode D11, and the sixth end of the comparator U6B. The second ends of the capacitor C27, the resistor R53, the voltage regulator diode D11, and the first end of the capacitor C25 are connected and grounded. The first end of the resistor R45 is connected to the bus voltage. The second end of the resistor R45 is connected to the fifth end of the comparator U6B. The seventh end of the comparator U6B is respectively connected to the second end of the resistor R43, the first end of the resistor R49, and the second end of the capacitor C25. The first end of the resistor R43 is connected to the battery pack. The second end of the resistor R49 is connected to the power control module.

[0034] Further, the forced charging wake-up module is implemented by the following circuit components;

[0035] The circuit components include a resistor R32, a resistor R33, a resistor R37, a resistor R39, a resistor R40, a capacitor C21, a capacitor C22, a capacitor C23, and a comparator U6A;

[0036] The first end of the resistor R32 is connected to an external voltage. The second end of the resistor R32 is respectively connected to the third end of the comparator U6A, the first end of the capacitor C22, and the first end of the resistor R39. The first end of the resistor R33 is connected to the battery voltage. The second end of the resistor R33 is respectively connected to the first end of the resistor R40, the first end of the capacitor C23, and the second end of the comparator U6A. The fifth end of the comparator U6A is connected to the battery pack. The first end of the comparator U6A is respectively connected to the second end of the capacitor C21 and the first end of the resistor R37. The second end of the R37 is connected to the power control module. The second ends of the capacitor C22, the resistor R39, the resistor R40, the capacitor C23, the fourth end of the comparator U6A, and the first end of the capacitor C21 are connected and grounded.

[0037] Further, the key switch and the reset wake-up module are implemented by the following circuit components;

[0038] The circuit components include a diode D, a capacitor C, a resistor R1, a resistor R2, a resistor R3, and a resistor R4;

[0039] The key switch, plugging door or reset button are respectively connected to the first end of the capacitor C, the first end of the resistor R1, and the first end of the resistor R2. The second end of the resistor R1 is respectively connected to the first end of the resistor R3, the power supply module, and the first end of the resistor R4. The second end of the resistor R3 is connected to the MCU control strategy module. The second ends of the capacitor C, the resistor R2, and the resistor R4 are respectively grounded.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The wake-up control device and its circuit applied to the battery management system provided by the present invention. In this wake-up control device, the system wake-up control module includes at least one module or a combination of multiple modules among the key switch, reset wake-up module, working wake-up module, over-discharge wake-up module, and forced charging wake-up module, and is used to perform wake-up control on the battery management system, so that the power control module provides electrical energy for the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on preset conditions satisfied during the charge and discharge process of the battery pack; among them, the working wake-up module is used to wake up the battery management system when the current of the battery pack meets the first preset condition; the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack meets the second preset condition. This technical solution can monitor the battery status and wake up the battery management system in a pure hardware wake-up manner, so that the battery management system stops supplying power to the battery in time, preventing the battery from being completely depleted and damaged, thereby achieving the effect of protecting the battery and extending its service life. Description of the Drawings

[0042] By reading the detailed description of the non-limiting embodiments with reference to the following drawings, other features, objects, and advantages of the present invention will become more obvious:

[0043] Figure 1 It is a structural block diagram of a wake-up control device applied to a battery management system provided by an embodiment of the present invention;

[0044] Figure 2 It is a wake-up control block diagram of a wake-up control device applied to a battery management system provided by an embodiment of the present invention;

[0045] Figure 3 It is a circuit schematic diagram of a key switch and a reset wake-up module provided by an embodiment of the present invention;

[0046] Figure 4 It is a circuit schematic diagram of a normal working wake-up module provided by an embodiment of the present invention;

[0047] Figure 5Schematic diagram of an over-discharge wake-up module provided by an embodiment of the present invention;

[0048] Figure 6 Schematic diagram of a forced charging wake-up module provided by an embodiment of the present invention. Detailed implementation manners

[0049] The present invention will be described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can still be made. These all belong to the protection scope of the present invention.

[0050] Embodiment 1:

[0051] Please refer to Figure 1 and Figure 2 . The wake-up control device applied to the battery management system includes a battery pack, a battery management system, and a relay. The battery pack, the battery management system, and the relay are electrically connected to each other. The battery management system includes a MOS switch, a current sampling module, a system wake-up control module, a power control module, and an MCU control strategy module (micro-control unit control strategy module). The output end of the battery pack is electrically connected to the first end of the relay, and the input end of the battery pack is electrically connected to the second end of the current sampling module. The first end of the current sampling module is electrically connected to the second end of the MOS switch, and the third end of the current sampling module is electrically connected to the system wake-up control module and the MCU control strategy module respectively. The system wake-up control module is electrically connected to the power control module, the MCU control strategy module, and the output end of the battery pack respectively. The power control module is electrically connected to the MCU control strategy module and the output end of the battery pack respectively. The MCU control strategy module is electrically connected to the second end of the relay, and the third end of the MOS switch is electrically connected to the MCU control strategy module;

[0052] The system wake-up control module includes the working wake-up module, which is used to perform wake-up control on the battery management system, so that the power control module provides electrical energy for the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack; wherein, the working wake-up module is used to wake up the battery management system when the current of the battery pack meets the first preset condition; optionally, when the discharge current of the battery pack exceeds 2.2 A or the charging current exceeds 2.2 A, the working wake-up module wakes up the battery management system.

[0053] Please refer toFigure 4 , when the system wake-up control module includes the working wake-up module, its wake-up circuit schematic diagram is as Figure 4 shown.

[0054] The working wake-up module includes operational amplifiers U5A, U5B, U7A, U7B, comparators U8A, U8B, resistors R1, R3, R8, R9, R10, R13, R16, R18, R22, R24, R25, R26, R27, R28, R30, R31, R35, R41, R42, R44, R46, R47, capacitors C24, C26, C28, C29, C30, C35, C36, C37, C38, C41, C42, C43, C44, C45;

[0055] The first end of the resistor R26 is connected to the bus current. The second end of the resistor R26 is respectively connected to the first end of the capacitor C36, the first end of the resistor R24, and the third end of the operational amplifier U5A. The second ends of the capacitor C36 and the resistor R24 are respectively grounded. The first end of the resistor R28 is connected to the reference current. The second end of the resistor R28 is respectively connected to the first end of the capacitor C37, the first end of the resistor R30, and the second end of the operational amplifier U5A. The fourth end of the operational amplifier U5A is grounded. The fifth end of the operational amplifier U5A is connected to the battery pack. The first end of the operational amplifier U5A is respectively connected to the second end of the capacitor C37, the second end of the resistor R30, and the first end of the resistor R25. The second end of the resistor R25 is respectively connected to the first end of the capacitor C35, the first end of the resistor R22, and the fifth end of the operational amplifier U5B. The first end of the resistor R27 is grounded. The second end of the resistor R27 is respectively connected to the first end of the capacitor C38, the first end of the resistor R31, and the sixth end of the operational amplifier U5B. The seventh end of the operational amplifier U5B is respectively connected to the second end of the capacitor C38, the second end of the resistor R31, and the first end of the resistor R35. The second end of the R35 is respectively connected to the first end of the capacitor C30 and the third end of the comparator U8A. The second end of the capacitor C30 is grounded. The first end of the capacitor C30 is connected to the third end of the comparator U8A. The second end of the comparator U8A and the first end of the capacitor C26 are respectively connected to the reference current. The fourth end of the comparator U8A, the second end of the capacitor C26, and the first end of the capacitor C24 are respectively grounded. The first end of the comparator U8A is respectively connected to the second end of the capacitor C24, the first end of the resistor R46, and the second end of the resistor R41. The first end of the resistor R41 and the fifth end of the comparator U8A are connected to the battery pack. The second end of the resistor R46 is connected to the power control module;

[0056] The first end of the resistor R10 is connected to a reference current. The second end of the resistor R10 is respectively connected to the first end of the capacitor C29, the first end of the resistor R8, and the third end of the operational amplifier U7A. The second ends of the capacitor C29 and the resistor R8 are respectively grounded. The first end of the resistor R42 is connected to a bus current. The second end of the resistor R42 is respectively connected to the first end of the capacitor C41, the first end of the resistor R44, and the second end of the operational amplifier U7A. The fourth end of the operational amplifier U7A is grounded. The fifth end of the operational amplifier U7A is connected to the battery pack. The first end of the operational amplifier U7A is respectively connected to the second end of the capacitor C41, the second end of the resistor R44, and the first end of the resistor R9. The second end of the resistor R9 is respectively connected to the first end of the capacitor C28, the first end of the resistor R3, and the fifth end of the operational amplifier U7B. The first end of the resistor R18 is grounded. The second end of the resistor R18 is respectively connected to the first end of the capacitor C42, the first end of the resistor R47, and the sixth end of the operational amplifier U7B. The seventh end of the operational amplifier U7B is respectively connected to the second end of the capacitor C42, the second end of the resistor R47, and the first end of the resistor R13. The second end of the R13 is respectively connected to the first end of the capacitor C43 and the fifth end of the comparator U8B. The second end of the capacitor C43 is grounded. The first end of the capacitor C43 is connected to the fifth end of the comparator U8B. The sixth end of the comparator U8B and the first end of the capacitor C45 are respectively connected to the reference current. The second ends of the capacitor C45 and the capacitor C44 are respectively grounded. The seventh end of the comparator U8B is respectively connected to the second end of the capacitor C44, the first end of the resistor R16, and the second end of the resistor R1. The first end of the resistor R1 is connected to a 6V voltage. The second end of the resistor R16 is connected to the power control module.

[0057] When the battery pack discharges, the bus current and the reference current are amplified twice by the operational amplifiers U5A and U5B, and then compared by the comparator U8A. When the comparator U8A determines that the difference between the bus current and the reference current exceeds 2.2A, the BMS is automatically woken up.

[0058] When the battery pack charges, the bus current and the reference current are amplified twice by the operational amplifiers U7A and U7B, and then compared by the comparator U8B. When the comparator U8B determines that the difference between the bus current and the reference current exceeds 2.2A, the BMS is automatically woken up.

[0059] In this embodiment, when the input or output current of the lithium battery exceeds ±2.2A, the BMS system will automatically generate a "working wake-up" and enter the normal working state from the off state. This wake-up method is the main wake-up method of the lithium start-up power supply, and it basically works in this wake-up method under normal working conditions.

[0060] Embodiment 2:

[0061] Please refer to Figure 1 and Figure 2 , the wake-up control device applied to the battery management system includes a battery pack, a battery management system, and a relay. The battery pack, the battery management system, and the relay are electrically connected to each other. The battery management system includes a MOS switch, a current sampling module, a system wake-up control module, a power control module, and an MCU control strategy module (micro-control unit control strategy module). The output end of the battery pack is electrically connected to the first end of the relay, and the input end of the battery pack is electrically connected to the second end of the current sampling module. The first end of the current sampling module is electrically connected to the second end of the MOS switch, and the third end of the current sampling module is electrically connected to the system wake-up control module and the MCU control strategy module respectively. The system wake-up control module is electrically connected to the power control module, the MCU control strategy module, and the output end of the battery pack respectively. The power control module is electrically connected to the MCU control strategy module and the output end of the battery pack respectively. The MCU control strategy module is electrically connected to the second end of the relay, and the third end of the MOS switch is electrically connected to the MCU control strategy module;

[0062] The system wake-up control module includes the over-discharge wake-up module and the forced charging wake-up module, which are used to perform wake-up control on the battery management system, so that the power control module provides electrical energy for the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on the preset conditions satisfied by the charge and discharge process of the battery pack. Among them, the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack meets the second preset condition. Optionally, when the open-circuit voltage of the battery pack is less than 20V, the over-discharge wake-up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack. The forced charging wake-up module is used to wake up the battery management system when an external power supply is connected, so that the battery pack is charged to turn on the external output of the battery pack.

[0063] Please refer to Figure 5 and Figure 6, when the system wake-up control module includes the over-discharge wake-up module and the forced charging wake-up module, its wake-up circuit schematic diagram is as follows Figure 5 and Figure 6 shown.

[0064] The over-discharge wake-up module includes resistor R43, resistor R45, resistor R48, resistor R49, resistor R53, capacitor C25, capacitor C27, zener diode D11 and comparator U6B;

[0065] The first end of resistor R48 is connected to the battery voltage, and the second end of resistor R48 is respectively connected to the first end of capacitor C27, the first end of resistor R53, the first end of zener diode D11 and the sixth end of comparator U6B. The second end of capacitor C27, the second end of resistor R53, the second end of zener diode D11 and the first end of capacitor C25 are connected and grounded. The first end of resistor R45 is connected to the bus voltage, and the second end of resistor R45 is connected to the fifth end of comparator U6B. The seventh end of comparator U6B is respectively connected to the second end of resistor R43, the first end of resistor R49 and the second end of capacitor C25. The first end of resistor R43 is connected to the battery pack, and the second end of resistor R49 is connected to the power control module.

[0066] When the battery is over-discharged, comparator U6B compares the battery voltage and the bus voltage. When the difference between the battery voltage and the bus voltage is less than 20V, the BMS is automatically woken up.

[0067] The forced charging wake-up module includes resistor R32, resistor R33, resistor R37, resistor R39, resistor R40, capacitor C21, capacitor C22, capacitor C23, comparator U6A;

[0068] The first end of resistor R32 is connected to an external voltage, and the second end of resistor R32 is respectively connected to the third end of comparator U6A, the first end of capacitor C22 and the first end of resistor R39. The first end of resistor R33 is connected to the battery voltage, and the second end of resistor R33 is respectively connected to the first end of resistor R40, the first end of capacitor C23 and the second end of comparator U6A. The fifth end of comparator U6A is connected to the battery pack. The first end of comparator U6A is respectively connected to the second end of capacitor C21 and the first end of resistor R37. The second end of R37 is connected to the power control module. The second end of capacitor C22, the second end of resistor R39, the second end of resistor R40, the second end of capacitor C23, the fourth end of comparator U6A and the first end of capacitor C21 are connected and grounded.

[0069] When the battery is forced to charge, comparator U6A compares the battery voltage and the external voltage. When the battery voltage is less than the external voltage, the BMS is automatically woken up.

[0070] In this embodiment, when the lithium start-up power supply is in a static state or has a minimum power output, to ensure the minimum power consumption of the system, the BMS system shuts itself down. When in this state (minimum power output) for a long time, the lithium battery itself will also slowly consume. When it is consumed to the warning threshold (set at 20V here), the system will generate an "over-discharge wake-up", wake up the BMS, and cut off the protection contactor to completely shut down the external output of the lithium start-up, protecting the lithium battery from damage due to over-discharge. Then the system will automatically shut down the control part of the BMS and cut off all consumption; when the lithium start-up battery shuts down all outputs due to over-discharge wake-up (to protect the lithium battery from damage due to over-discharge), in order to restore it to the normal state, the lithium start-up power supply needs to be charged (using a dedicated charging device or charging with other lithium batteries). At this time, the system will generate a "forced charging wake-up", wake up the BMS, and then connect the protection contactor to enable the start-up power supply to be charged normally, thus restoring the normal working state.

[0071] Embodiment 3:

[0072] Please refer to Figure 1 and Figure 2 , the wake-up control device applied to the battery management system includes a battery pack, a battery management system, and a relay. The battery pack, the battery management system, and the relay are electrically connected to each other. The battery management system includes a MOS switch, a current sampling module, a system wake-up control module, a power control module, and an MCU control strategy module (micro-control unit control strategy module). The output end of the battery pack is electrically connected to the first end of the relay, and the input end of the battery pack is electrically connected to the second end of the current sampling module. The first end of the current sampling module is electrically connected to the second end of the MOS switch, and the third end of the current sampling module is electrically connected to the system wake-up control module and the MCU control strategy module respectively. The system wake-up control module is electrically connected to the power control module, the MCU control strategy module, and the output end of the battery pack respectively. The power control module is electrically connected to the MCU control strategy module and the output end of the battery pack respectively. The MCU control strategy module is electrically connected to the second end of the relay. The third end of the MOS switch is electrically connected to the MCU control strategy module;

[0073] The system wake-up control module includes the working wake-up module, the over-discharge wake-up module, and the forced charging wake-up module, and is used to perform wake-up control on the battery management system, so that the power control module provides electrical energy for the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on preset conditions satisfied during the charge and discharge process of the battery pack; among them, the working wake-up module is used to wake up the battery management system when the current of the battery pack meets the first preset condition; optionally, when the discharge current of the battery pack exceeds 2.2 A or the charging current exceeds 2.2 A, the working wake-up module wakes up the battery management system; the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack meets the second preset condition; optionally, when the open-circuit voltage of the battery pack is less than 20 V, the over-discharge wake-up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack; the forced charging wake-up module is used to wake up the battery management system when an external power supply is connected, so that the battery pack is charged to turn on the external output of the battery pack.

[0074] Please refer to Figures 4 - 6 , when the system wake-up control module includes the working wake-up module, the over-discharge wake-up module, and the forced charging wake-up module, its wake-up circuit schematic diagram is as Figures 4 - 6 shown.

[0075] The working wake-up module includes operational amplifiers U5A, U5B, U7A, U7B, comparators U8A, U8B, resistors R1, R3, R8, R9, R10, R13, R16, R18, R22, R24, R25, R26, R27, R28, R30, R31, R35, R41, R42, R44, R46, R47, capacitors C24, C26, C28, C29, C30, C35, C36, C37, C38, C41, C42, C43, C44, C45;

[0076] The first end of the resistor R26 is connected to the bus current. The second end of the resistor R26 is respectively connected to the first end of the capacitor C36, the first end of the resistor R24, and the third end of the operational amplifier U5A. The second ends of the capacitor C36 and the resistor R24 are respectively grounded. The first end of the resistor R28 is connected to the reference current. The second end of the resistor R28 is respectively connected to the first end of the capacitor C37, the first end of the resistor R30, and the second end of the operational amplifier U5A. The fourth end of the operational amplifier U5A is grounded. The fifth end of the operational amplifier U5A is connected to the battery pack. The first end of the operational amplifier U5A is respectively connected to the second end of the capacitor C37, the second end of the resistor R30, and the first end of the resistor R25. The second end of the resistor R25 is respectively connected to the first end of the capacitor C35, the first end of the resistor R22, and the fifth end of the operational amplifier U5B. The first end of the resistor R27 is grounded. The second end of the resistor R27 is respectively connected to the first end of the capacitor C38, the first end of the resistor R31, and the sixth end of the operational amplifier U5B. The seventh end of the operational amplifier U5B is respectively connected to the second end of the capacitor C38, the second end of the resistor R31, and the first end of the resistor R35. The second end of the R35 is respectively connected to the first end of the capacitor C30 and the third end of the comparator U8A. The second end of the capacitor C30 is grounded. The first end of the capacitor C30 is connected to the third end of the comparator U8A. The second end of the comparator U8A and the first end of the capacitor C26 are respectively connected to the reference current. The fourth end of the comparator U8A, the second end of the capacitor C26, and the first end of the capacitor C24 are respectively grounded. The first end of the comparator U8A is respectively connected to the second end of the capacitor C24, the first end of the resistor R46, and the second end of the resistor R41. The first end of the resistor R41 and the fifth end of the comparator U8A are connected to the battery pack. The second end of the resistor R46 is connected to the power control module;

[0077] The first end of the resistor R10 is connected to the reference current. The second end of the resistor R10 is respectively connected to the first end of the capacitor C29, the first end of the resistor R8, and the third end of the operational amplifier U7A. The second ends of the capacitor C29 and the resistor R8 are respectively grounded. The first end of the resistor R42 is connected to the bus current. The second end of the resistor R42 is respectively connected to the first end of the capacitor C41, the first end of the resistor R44, and the second end of the operational amplifier U7A. The fourth end of the operational amplifier U7A is grounded. The fifth end of the operational amplifier U7A is connected to the battery pack. The first end of the operational amplifier U7A is respectively connected to the second end of the capacitor C41, the second end of the resistor R44, and the first end of the resistor R9. The second end of the resistor R9 is respectively connected to the first end of the capacitor C28, the first end of the resistor R3, and the fifth end of the operational amplifier U7B. The first end of the resistor R18 is grounded. The second end of the resistor R18 is respectively connected to the first end of the capacitor C42, the first end of the resistor R47, and the sixth end of the operational amplifier U7B. The seventh end of the operational amplifier U7B is respectively connected to the second end of the capacitor C42, the second end of the resistor R47, and the first end of the resistor R13. The second end of the R13 is respectively connected to the first end of the capacitor C43 and the fifth end of the comparator U8B. The second end of the capacitor C43 is grounded. The first end of the capacitor C43 is connected to the fifth end of the comparator U8B. The sixth end of the comparator U8B and the first end of the capacitor C45 are respectively connected to the reference current. The second ends of the capacitor C45 and the capacitor C44 are respectively grounded. The seventh end of the comparator U8B is respectively connected to the second end of the capacitor C44, the first end of the resistor R16, and the second end of the resistor R1. The first end of the resistor R1 is connected to a 6V voltage. The second end of the resistor R16 is connected to the power control module.

[0078] When the battery pack discharges, the bus current and the reference current are secondarily amplified by the operational amplifiers U5A and U5B, and then compared by the comparator U8A. When the comparator U8A determines that the difference between the bus current and the reference current exceeds 2.2A, the BMS is automatically woken up;

[0079] When the battery pack charges, the bus current and the reference current are secondarily amplified by the operational amplifiers U7A and U7B, and then compared by the comparator U8B. When the comparator U8B determines that the difference between the bus current and the reference current exceeds 2.2A, the BMS is automatically woken up.

[0080] The over-discharge wake-up module includes a resistor R43, a resistor R45, a resistor R48, a resistor R49, a resistor R53, a capacitor C25, a capacitor C27, a zener diode D11, and a comparator U6B;

[0081] The first end of the resistor R48 is connected to the battery voltage. The second end of the resistor R48 is respectively connected to the first end of the capacitor C27, the first end of the resistor R53, the first end of the voltage regulator diode D11, and the sixth end of the comparator U6B. The second end of the capacitor C27, the second end of the resistor R53, the second end of the voltage regulator diode D11, and the first end of the capacitor C25 are connected and grounded. The first end of the resistor R45 is connected to the bus voltage. The second end of the resistor R45 is connected to the fifth end of the comparator U6B. The seventh end of the comparator U6B is respectively connected to the second end of the resistor R43, the first end of the resistor R49, and the second end of the capacitor C25. The first end of the resistor R43 is connected to the battery pack. The second end of the resistor R49 is connected to the power control module.

[0082] When the battery is over-discharged, the comparator U6B compares the battery voltage and the bus voltage. When the difference between the battery voltage and the bus voltage is less than 20V, the BMS is automatically awakened.

[0083] The forced charging wake-up module includes a resistor R32, a resistor R33, a resistor R37, a resistor R39, a resistor R40, a capacitor C21, a capacitor C22, a capacitor C23, and a comparator U6A;

[0084] The first end of the resistor R32 is connected to an external voltage. The second end of the resistor R32 is respectively connected to the third end of the comparator U6A, the first end of the capacitor C22, and the first end of the resistor R39. The first end of the resistor R33 is connected to the battery voltage. The second end of the resistor R33 is respectively connected to the first end of the resistor R40, the first end of the capacitor C23, and the second end of the comparator U6A. The fifth end of the comparator U6A is connected to the battery pack. The first end of the comparator U6A is respectively connected to the second end of the capacitor C21 and the first end of the resistor R37. The second end of the R37 is connected to the power control module. The second end of the capacitor C22, the second end of the resistor R39, the second end of the resistor R40, the second end of the capacitor C23, the fourth end of the comparator U6A, and the first end of the capacitor C21 are connected and grounded.

[0085] When the battery is forced to charge, the comparator U6A compares the battery voltage and the external voltage. When the battery voltage is less than the external voltage, the BMS is automatically awakened.

[0086] In this embodiment, when the input or output current of the lithium battery exceeds ±2.2 A, the BMS system will automatically generate a "working wake-up" and enter the normal working state from the off state. This wake-up method is the main wake-up method of the lithium start-up power supply, and it basically works in this wake-up method under normal working conditions. When the lithium start-up power supply is in a static state or has a very low power output, to ensure the minimum power consumption of the system, the BMS system shuts itself down. When in this state (very low power output) for a long time, the lithium battery itself will also gradually consume. When the consumption reaches the warning threshold (set at 20 V here), the system will generate an "over-discharge wake-up". The wake-up BMS disconnects the protection contactor to completely shut down the external output of the lithium start-up, protecting the lithium battery from damage due to over-discharge. Then the system will automatically shut down the control part of the BMS and cut off all consumption. When the lithium start-up battery shuts down all outputs due to over-discharge wake-up (to protect the lithium battery from damage due to over-discharge), to restore it to the normal state, the lithium start-up power supply needs to be charged (using a dedicated charging device or charging it with other lithium batteries). At this time, the system will generate a "forced charging wake-up", wake up the BMS and then connect the protection contactor so that the start-up power supply can be normally charged and thus restore the normal working state.

[0087] Embodiment 4:

[0088] Please refer to Figure 1 and Figure 2 This wake-up control device applied to the battery management system includes a battery pack, a battery management system, and a relay. The battery pack, the battery management system, and the relay are electrically connected to each other. The battery management system includes a MOS switch, a current sampling module, a system wake-up control module, a power control module, and an MCU control strategy module (micro-control unit control strategy module). The output end of the battery pack is electrically connected to the first end of the relay, and the input end of the battery pack is electrically connected to the second end of the current sampling module. The first end of the current sampling module is electrically connected to the second end of the MOS switch, and the third end of the current sampling module is electrically connected to the system wake-up control module and the MCU control strategy module respectively. The system wake-up control module is electrically connected to the power control module, the MCU control strategy module, and the output end of the battery pack respectively. The power control module is electrically connected to the MCU control strategy module and the output end of the battery pack respectively. The MCU control strategy module is electrically connected to the second end of the relay, and the third end of the MOS switch is electrically connected to the MCU control strategy module;

[0089] The system wake-up control module includes the key switch, the reset wake-up module, the working wake-up module, the over-discharge wake-up module, and the forced charging wake-up module, and is used to perform wake-up control on the battery management system, so that the power control module provides electrical energy for the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on preset conditions satisfied by the charge and discharge process of the battery pack; among them, the key switch and the reset wake-up module are used to wake up the battery management system when an external key switch is input or a reset button of the battery pack is input; the working wake-up module is used to wake up the battery management system when the current of the battery pack meets a first preset condition; optionally, when the discharge current of the battery pack exceeds 2.2A or the charging current exceeds 2.2A, the working wake-up module wakes up the battery management system; the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack meets a second preset condition; optionally, when the open-circuit voltage of the battery pack is less than 20V, the over-discharge wake-up module wakes up the battery management system so that the battery management system turns off the external output of the battery pack; the forced charging wake-up module is used to wake up the battery management system when an external power supply is connected, so that the battery pack is charged to turn on the external output of the battery pack.

[0090] Please refer to Figures 3 - 6 , when the system wake-up control module includes the working wake-up module, the over-discharge wake-up module, and the forced charging wake-up module, the schematic diagram of its wake-up circuit is as Figures 3 - 6 shown.

[0091] The key switch and the reset wake-up module include diode D, capacitor C, resistor R1, resistor R2, resistor R3, and resistor R4;

[0092] The key switch plug or the reset button are respectively connected to the first end of the capacitor C, the first end of the resistor R1, and the first end of the resistor R2. The second end of the resistor R1 is respectively connected to the first end of the resistor R3, the power supply module, and the first end of the resistor R4. The second end of the resistor R3 is connected to the MCU control strategy module. The second ends of the capacitor C, the resistor R2, and the resistor R4 are respectively grounded.

[0093] When the key is inserted into the key switch plug or the battery reset button is pressed, the BMS is automatically woken up.

[0094] The working wake-up module includes operational amplifiers U5A, U5B, U7A, and U7B, comparators U8A and U8B, resistors R1, R3, R8, R9, R10, R13, R16, R18, R22, R24, R25, R26, R27, R28, R30, R31, R35, R41, R42, R44, R46, R47, capacitors C24, C26, C28, C29, C30, C35, C36, C37, C38, C41, C42, C43, C44, and C45;

[0095] The first end of the resistor R26 is connected to the bus current. The second end of the resistor R26 is respectively connected to the first end of the capacitor C36, the first end of the resistor R24, and the third end of the operational amplifier U5A. The second ends of the capacitor C36 and the resistor R24 are respectively grounded. The first end of the resistor R28 is connected to the reference current. The second end of the resistor R28 is respectively connected to the first end of the capacitor C37, the first end of the resistor R30, and the second end of the operational amplifier U5A. The fourth end of the operational amplifier U5A is grounded. The fifth end of the operational amplifier U5A is connected to the battery pack. The first end of the operational amplifier U5A is respectively connected to the second end of the capacitor C37, the second end of the resistor R30, and the first end of the resistor R25. The second end of the resistor R25 is respectively connected to the first end of the capacitor C35, the first end of the resistor R22, and the fifth end of the operational amplifier U5B. The first end of the resistor R27 is grounded. The second end of the resistor R27 is respectively connected to the first end of the capacitor C38, the first end of the resistor R31, and the sixth end of the operational amplifier U5B. The seventh end of the operational amplifier U5B is respectively connected to the second end of the capacitor C38, the second end of the resistor R31, and the first end of the resistor R35. The second end of the R35 is respectively connected to the first end of the capacitor C30 and the third end of the comparator U8A. The second end of the capacitor C30 is grounded. The first end of the capacitor C30 is connected to the third end of the comparator U8A. The second end of the comparator U8A and the first end of the capacitor C26 are respectively connected to the reference current. The fourth end of the comparator U8A, the second end of the capacitor C26, and the first end of the capacitor C24 are respectively grounded. The first end of the comparator U8A is respectively connected to the second end of the capacitor C24, the first end of the resistor R46, and the second end of the resistor R41. The first end of the resistor R41 and the fifth end of the comparator U8A are connected to the battery pack. The second end of the resistor R46 is connected to the power control module;

[0096] The first end of the resistor R10 is connected to the reference current. The second end of the resistor R10 is respectively connected to the first end of the capacitor C29, the first end of the resistor R8, and the third end of the operational amplifier U7A. The second ends of the capacitor C29 and the resistor R8 are respectively grounded. The first end of the resistor R42 is connected to the bus current. The second end of the resistor R42 is respectively connected to the first end of the capacitor C41, the first end of the resistor R44, and the second end of the operational amplifier U7A. The fourth end of the operational amplifier U7A is grounded. The fifth end of the operational amplifier U7A is connected to the battery pack. The first end of the operational amplifier U7A is respectively connected to the second end of the capacitor C41, the second end of the resistor R44, and the first end of the resistor R9. The second end of the resistor R9 is respectively connected to the first end of the capacitor C28, the first end of the resistor R3, and the fifth end of the operational amplifier U7B. The first end of the resistor R18 is grounded. The second end of the resistor R18 is respectively connected to the first end of the capacitor C42, the first end of the resistor R47, and the sixth end of the operational amplifier U7B. The seventh end of the operational amplifier U7B is respectively connected to the second end of the capacitor C42, the second end of the resistor R47, and the first end of the resistor R13. The second end of the R13 is respectively connected to the first end of the capacitor C43 and the fifth end of the comparator U8B. The second end of the capacitor C43 is grounded. The first end of the capacitor C43 is connected to the fifth end of the comparator U8B. The sixth end of the comparator U8B and the first end of the capacitor C45 are respectively connected to the reference current. The second ends of the capacitor C45 and the capacitor C44 are respectively grounded. The seventh end of the comparator U8B is respectively connected to the second end of the capacitor C44, the first end of the resistor R16, and the second end of the resistor R1. The first end of the resistor R1 is connected to a 6V voltage. The second end of the resistor R16 is connected to the power control module.

[0097] When the battery pack discharges, the bus current and the reference current are secondarily amplified by the operational amplifiers U5A and U5B, and then compared by the comparator U8A. When the comparator U8A determines that the difference between the bus current and the reference current exceeds 2.2A, the BMS is automatically awakened;

[0098] When the battery pack charges, the bus current and the reference current are secondarily amplified by the operational amplifiers U7A and U7B, and then compared by the comparator U8B. When the comparator U8B determines that the difference between the bus current and the reference current exceeds 2.2A, the BMS is automatically awakened.

[0099] The over-discharge wake-up module includes a resistor R43, a resistor R45, a resistor R48, a resistor R49, a resistor R53, a capacitor C25, a capacitor C27, a zener diode D11, and a comparator U6B;

[0100] The first end of the resistor R48 is connected to the battery voltage. The second end of the resistor R48 is respectively connected to the first end of the capacitor C27, the first end of the resistor R53, the first end of the voltage regulator diode D11, and the sixth end of the comparator U6B. The second ends of the capacitor C27, the resistor R53, the voltage regulator diode D11, and the first end of the capacitor C25 are connected and grounded. The first end of the resistor R45 is connected to the bus voltage. The second end of the resistor R45 is connected to the fifth end of the comparator U6B. The seventh end of the comparator U6B is respectively connected to the second end of the resistor R43, the first end of the resistor R49, and the second end of the capacitor C25. The first end of the resistor R43 is connected to the battery pack. The second end of the resistor R49 is connected to the power control module.

[0101] When the battery is over-discharged, the comparator U6B compares the battery voltage and the bus voltage. When the difference between the battery voltage and the bus voltage is less than 20V, the BMS is automatically awakened.

[0102] The forced charging wake-up module includes a resistor R32, a resistor R33, a resistor R37, a resistor R39, a resistor R40, a capacitor C21, a capacitor C22, a capacitor C23, and a comparator U6A;

[0103] The first end of the resistor R32 is connected to an external voltage. The second end of the resistor R32 is respectively connected to the third end of the comparator U6A, the first end of the capacitor C22, and the first end of the resistor R39. The first end of the resistor R33 is connected to the battery voltage. The second end of the resistor R33 is respectively connected to the first end of the resistor R40, the first end of the capacitor C23, and the second end of the comparator U6A. The fifth end of the comparator U6A is connected to the battery pack. The first end of the comparator U6A is respectively connected to the second end of the capacitor C21 and the first end of the resistor R37. The second end of the R37 is connected to the power control module. The second ends of the capacitor C22, the resistor R39, the resistor R40, the capacitor C23, the fourth end of the comparator U6A, and the first end of the capacitor C21 are connected and grounded.

[0104] When the battery is forced to charge, the comparator U6A compares the battery voltage and the external voltage. When the battery voltage is less than the external voltage, the BMS is automatically awakened.

[0105] In this embodiment, whether it is the input of the external key switch (Key_ON) or the input of the reset (RESET) button of the battery itself, after being processed by the circuit, it is sent to the power module to wake up the power of the BMS system, so that the lithium start battery enters the working state. This wake-up mode is also the necessary working mode for system program download and parameter calibration. That is to say, whether it is future program upgrade or parameter calibration, the system must be woken up through this wake-up input first; when the input or output current of the lithium battery exceeds ±2.2 A, the BMS system will automatically generate a "working wake-up" and enter the normal working state from the off state. This wake-up method is the main wake-up method of the lithium start power supply and basically works in this wake-up method under normal working conditions. When the lithium start power supply is in a static state or has a very low power output, to ensure the minimum power consumption of the system, the BMS system shuts itself down. When in this state (very low power output) for a long time, the lithium battery itself will also slowly consume. When the consumption reaches the warning threshold (set at 20 V here), the system will generate an "over-discharge wake-up", wake up the BMS, and cut off the protection contactor to completely shut down the external output of the lithium start, protecting the lithium battery from damage due to over-discharge. Then the system will automatically shut down the control part of the BMS and cut off all consumption; when the lithium start battery shuts down all outputs due to over-discharge wake-up (to protect the lithium battery from damage due to over-discharge), in order to restore it to the normal state, the lithium start power supply needs to be charged (using a dedicated charging device or charging with other lithium batteries). At this time, the system will generate a "forced charging wake-up", wake up the BMS, and then connect the protection contactor so that the start power supply can be normally charged and thus restore the normal working state.

[0106] The specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. Without conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A wake-up control device applied to a battery management system, comprising a battery pack, a battery management system and a relay, wherein the battery pack, the battery management system and the relay are electrically connected to each other; Characterized in that, The battery management system includes a MOS switch, a current sampling module, a system wake-up control module, a power control module and an MCU control strategy module, wherein: The output end of the battery pack is electrically connected to the first end of the relay, and the input end of the battery pack is electrically connected to the second end of the current sampling module; The first end of the current sampling module is electrically connected to the second end of the MOS switch, and the third end of the current sampling module is electrically connected to the system wake-up control module and the MCU control strategy module respectively, for sampling the current and voltage of the battery pack and the external power supply; The system wake-up control module is electrically connected to the power control module, the MCU control strategy module and the output end of the battery pack respectively, and is used to control the power control module to supply power to the MCU control strategy module when the charging and discharging process of the battery pack does not belong to a preset working condition, so that the MCU control strategy module controls the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack; The power control module is electrically connected to the MCU control strategy module and the output end of the battery pack respectively, and is used to supply power to the MCU control strategy module; The MCU control strategy module is electrically connected to the second end of the relay, and the third end of the MOS switch is electrically connected to the MCU control strategy module, and is used to control the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack; The system wake-up control module includes at least one module or a combination of multiple modules among a key switch, a reset wake-up module, a working wake-up module, an over-discharge wake-up module and a forced charging wake-up module, and is used to perform wake-up control on the battery management system, so that the power control module provides electric energy for the MCU control strategy module, and so that the MCU control strategy module controls the battery pack based on the preset conditions satisfied by the charging and discharging process of the battery pack; The working wake-up module is used to wake up the battery management system when the current of the battery pack meets the first preset condition; the over-discharge wake-up module is used to wake up the battery management system when the open-circuit voltage of the battery pack meets the second preset condition.

2. The wake-up control device applied to a battery management system according to claim 1, Characterized in that, The system wake-up control module includes the working wake-up module; When the discharge current of the battery pack exceeds the first preset threshold or the charging current exceeds the second preset threshold, the working wake-up module wakes up the battery management system.

3. The wake-up control device applied to a battery management system according to claim 1, Characterized in that, The system wake-up control module includes the over-discharge wake-up module and the forced charging wake-up module; When the open - circuit voltage of the battery pack is less than a third preset threshold, the over - discharge wake - up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack; When an external power supply is connected, the forced - charging wake - up module wakes up the battery management system, causing the battery pack to charge to turn on the external output of the battery pack.

4. The wake - up control device applied to a battery management system according to claim 1, characterized in that, the system wake - up control module includes the working wake - up module, the over - discharge wake - up module and the forced - charging wake - up module; When the discharge current of the battery pack exceeds a first preset threshold or the charging current exceeds a second preset threshold, the working wake - up module wakes up the battery management system; When the open - circuit voltage of the battery pack is less than a third preset threshold, the over - discharge wake - up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack; When an external power supply is connected, the forced - charging wake - up module wakes up the battery management system, causing the battery pack to charge to turn on the external output of the battery pack.

5. The wake - up control device applied to a battery management system according to claim 1, characterized in that, the system wake - up control module includes the key switch, the reset wake - up module, the working wake - up module, the over - discharge wake - up module and the forced - charging wake - up module; When there is an input from an external key switch or an input from the reset button of the battery pack, the key switch and the reset wake - up module wake up the battery management system; When the discharge current of the battery pack exceeds a first preset threshold or the charging current exceeds a second preset threshold, the working wake - up module wakes up the battery management system; When the open - circuit voltage of the battery pack is less than a third preset threshold, the over - discharge wake - up module wakes up the battery management system so that the battery management system shuts down the external output of the battery pack; When an external power supply is connected, the forced - charging wake - up module wakes up the battery management system, causing the battery pack to charge to turn on the external output of the battery pack.

6. A wake - up control circuit applied to a battery management system for implementing the wake - up control device applied to a battery management system according to any one of claims 1 to 5.

7. The wake - up control circuit applied to a battery management system according to claim 6, characterized in that, the working wake - up module is implemented by the following circuit elements; The circuit components include operational amplifiers U5A, U5B, U7A, U7B, comparators U8A, U8B, resistors R1, R3, R8, R9, R10, R13, R16, R18, R22, R24, R25, R26, R27, R28, R30, R31, R35, R41, R42, R44, R46, R47, capacitors C24, C26, C28, C29, C30, C35, C36, C37, C38, C41, C42, C43, C44, C45; The first end of the resistor R26 is connected to the bus current, the second end of the resistor R26 is respectively connected to the first end of the capacitor C36, the first end of the resistor R24, and the third end of the operational amplifier U5A. The second ends of the capacitor C36 and the resistor R24 are respectively grounded. The first end of the resistor R28 is connected to the reference current, the second end of the resistor R28 is respectively connected to the first end of the capacitor C37, the first end of the resistor R30, and the second end of the operational amplifier U5A. The fourth end of the operational amplifier U5A is grounded, the fifth end of the operational amplifier U5A is connected to the battery pack, the first end of the operational amplifier U5A is respectively connected to the second end of the capacitor C37, the second end of the resistor R30, and the first end of the resistor R25. The second end of the resistor R25 is respectively connected to the first end of the capacitor C35, the first end of the resistor R22, and the fifth end of the operational amplifier U5B. The first end of the resistor R27 is grounded, the second end of the resistor R27 is respectively connected to the first end of the capacitor C38, the first end of the resistor R31, and the sixth end of the operational amplifier U5B. The seventh end of the operational amplifier U5B is respectively connected to the second end of the capacitor C38, the second end of the resistor R31, and the first end of the resistor R35. The second end of the resistor R35 is respectively connected to the first end of the capacitor C30 and the third end of the comparator U8A. The second end of the capacitor C30 is grounded, the first end of the capacitor C30 is connected to the third end of the comparator U8A. The second end of the comparator U8A and the first end of the capacitor C26 are respectively connected to the reference current. The fourth end of the comparator U8A, the second end of the capacitor C26, and the first end of the capacitor C24 are respectively grounded. The first end of the comparator U8A is respectively connected to the second end of the capacitor C24, the first end of the resistor R46, and the second end of the resistor R41. The first end of the resistor R41 and the fifth end of the comparator U8A are connected to the battery pack. The second end of the resistor R46 is connected to the power control module; The first end of the resistor R10 is connected to the reference current. The second end of the resistor R10 is respectively connected to the first end of the capacitor C29, the first end of the resistor R8, and the third end of the operational amplifier U7A. The second ends of the capacitor C29 and the resistor R8 are respectively grounded. The first end of the resistor R42 is connected to the bus current. The second end of the resistor R42 is respectively connected to the first end of the capacitor C41, the first end of the resistor R44, and the second end of the operational amplifier U7A. The fourth end of the operational amplifier U7A is grounded. The fifth end of the operational amplifier U7A is connected to the battery pack. The first end of the operational amplifier U7A is respectively connected to the second end of the capacitor C41, the second end of the resistor R44, and the first end of the resistor R9. The second end of the resistor R9 is respectively connected to the first end of the capacitor C28, the first end of the resistor R3, and the fifth end of the operational amplifier U7B. The first end of the resistor R18 is grounded. The second end of the resistor R18 is respectively connected to the first end of the capacitor C42, the first end of the resistor R47, and the sixth end of the operational amplifier U7B. The seventh end of the operational amplifier U7B is respectively connected to the second end of the capacitor C42, the second end of the resistor R47, and the first end of the resistor R13. The second end of the R13 is respectively connected to the first end of the capacitor C43 and the fifth end of the comparator U8B. The second end of the capacitor C43 is grounded. The first end of the capacitor C43 is connected to the fifth end of the comparator U8B. The sixth end of the comparator U8B and the first end of the capacitor C45 are respectively connected to the reference current. The second end of the capacitor C45 and the first end of the capacitor C44 are respectively grounded. The seventh end of the comparator U8B is respectively connected to the second end of the capacitor C44, the first end of the resistor R16, and the second end of the resistor R1. The first end of the resistor R1 is connected to a 6V voltage. The second end of the resistor R16 is connected to the power control module.

8. The wake-up control circuit applied to the battery management system according to claim 6, characterized in that, the over-discharge wake-up module is implemented by the following circuit elements; The circuit elements include a resistor R43, a resistor R45, a resistor R48, a resistor R49, a resistor R53, a capacitor C25, a capacitor C27, a zener diode D11, and a comparator U6B; The first end of the resistor R48 is connected to the battery voltage. The second end of the resistor R48 is respectively connected to the first end of the capacitor C27, the first end of the resistor R53, the first end of the voltage stabilizing diode D11, and the sixth end of the comparator U6B. The second end of the capacitor C27, the second end of the resistor R53, the second end of the voltage stabilizing diode D11, and the first end of the capacitor C25 are connected and grounded. The first end of the resistor R45 is connected to the bus voltage. The second end of the resistor R45 is connected to the fifth end of the comparator U6B. The seventh end of the comparator U6B is respectively connected to the second end of the resistor R43, the first end of the resistor R49, and the second end of the capacitor C25. The first end of the resistor R43 is connected to the battery pack. The second end of the resistor R49 is connected to the power control module.

9. The wake-up control circuit applied to the battery management system according to claim 6, characterized in that, the forced charging wake-up module is implemented by the following circuit elements; The circuit elements include a resistor R32, a resistor R33, a resistor R37, a resistor R39, a resistor R40, a capacitor C21, a capacitor C22, a capacitor C23, and a comparator U6A; The first end of the resistor R32 is connected to an external voltage. The second end of the resistor R32 is respectively connected to the third end of the comparator U6A, the first end of the capacitor C22, and the first end of the resistor R39. The first end of the resistor R33 is connected to the battery voltage. The second end of the resistor R33 is respectively connected to the first end of the resistor R40, the first end of the capacitor C23, and the second end of the comparator U6A. The fifth end of the comparator U6A is connected to the battery pack. The first end of the comparator U6A is respectively connected to the second end of the capacitor C21 and the first end of the resistor R37. The second end of the R37 is connected to the power control module. The second end of the capacitor C22, the second end of the resistor R39, the second end of the resistor R40, the second end of the capacitor C23, the fourth end of the comparator U6A, and the first end of the capacitor C21 are connected and grounded.

10. The wake-up control circuit applied to the battery management system according to claim 6, characterized in that, the key switch and the reset wake-up module are implemented by the following circuit elements; The circuit elements include a diode D, a capacitor C, a resistor R1, a resistor R2, a resistor R3, and a resistor R4; The key switch socket or the reset button is respectively connected to the first end of the capacitor C, the first end of the resistor R1, and the first end of the resistor R2. The second end of the resistor R1 is respectively connected to the first end of the resistor R3, the power supply module, and the first end of the resistor R4. The second end of the resistor R3 is connected to the MCU control strategy module. The second end of the capacitor C, the second end of the resistor R2, and the second end of the resistor R4 are respectively grounded.

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