Lithium battery zero-volt emergency charging method and system and special lithium battery for centralized power supply

Abstract

According to the lithium battery zero-volt emergency charging method, the lithium battery zero-volt emergency charging system and the lithium battery special for the centralized power supply, in the system, when the lithium battery is in the zero-volt state, the activation input module is connected to the external activation system, low-voltage and small-current power supply is carried out through the external activation system, and when the external activation system carries out low-voltage and small-current power supply, the lithium battery is charged. The external activation system performs detection to obtain lithium battery parameters including real-time residual electric quantity, voltage and other parameter values, and when the charging of the lithium battery reaches a preset residual electric quantity threshold value in the external activation system, the external activation system stops low-voltage low-current power supply for the lithium battery, so that the lithium battery supplies power at a normal voltage value. And meanwhile, the BMS is bypassed, the lithium battery does not need to be disassembled for maintenance, and the convenience is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a zero-volt emergency power replenishment method and system for lithium batteries and a dedicated lithium battery for centralized power supply. Background Art

[0002] BMS usually refers to the Battery Management System, which is an electronic system used to manage and protect battery packs. The main functions of BMS include monitoring battery voltage, current, temperature and other parameters to ensure that the battery operates within a safe operating range and prevent abnormal conditions such as overcharging, over-discharging, over-temperature and over-current, thereby avoiding serious consequences such as thermal runaway. BMS can also complete the evaluation of battery power and health status, provide users with accurate power display, enhance users' understanding of battery status, and predict battery life and performance degradation to help users maintain and replace batteries in a timely manner and extend battery life.

[0003] The zero-volt state of a lithium battery usually refers to the battery voltage dropping to 0V. This situation may be caused by a variety of reasons, such as battery over-discharge, internal short circuit, battery aging, external factors (such as impact, fall, extrusion, etc.) or charger failure.

[0004] The current battery pack needs to be charged through the BMS system. If the battery is not used for a long time, the battery cell will be depleted and the battery cell voltage will be close to 0v. When the battery cell is in the 0V state, the existing BMS system cannot be activated and needs to be removed and activated before the battery can be charged. Summary of the invention

[0005] The technical problem to be solved by this application is that the current battery pack charging needs to go through the BMS system. If the battery is not used for a long time, the battery cell will be depleted and the battery cell voltage will be close to 0v. When the battery cell is in the 0V state, the existing BMS system cannot be activated and needs to be removed and activated before the battery can be charged.

[0006] In order to solve the above problems, in order to solve the above technical problems or at least partially solve the above technical problems, the present application provides a lithium battery zero-volt emergency power replenishment method, system and a dedicated lithium battery for a centralized power supply.

[0007] In a first aspect, the present invention discloses a zero-volt emergency power replenishment system for a lithium battery, which includes an activation input module connected to a lithium battery; The activation input module is used to connect to an external activation system to provide low-voltage power to the lithium battery. The external activation system obtains lithium battery parameters in real time during the power supply process, and the lithium battery parameters include real-time remaining power; When the lithium battery is in a zero-volt state, the activation input module is connected to an external activation system for low-voltage power supply. The external activation system presets a remaining power threshold. When the real-time remaining power of the lithium battery exceeds the remaining power threshold, the external activation system stops providing low-voltage power supply to the lithium battery.

[0008] Preferably, it comprises a management control module and an input-output module, wherein the management control module is connected to the lithium battery, and the management control module is connected to the input-output module; The input-output module inputs power to the lithium battery or connects to the lithium battery to output power, and the management control module monitors and controls the battery charging and discharging process.

[0009] Preferably, it comprises a switching switch, the switching switch is respectively connected to the activation input module or the management control module; When the lithium battery is in a zero-volt state, the switching switch disconnects the input-output module, and connects the activation input module to connect the lithium battery to an external activation system for low-voltage power supply.

[0010] Preferably, the management control module includes a management unit, a control unit and a wireless communication unit, the management unit is connected to the control unit, the control unit is connected to a switch, and the wireless communication unit is connected to the control unit.

[0011] Preferably, it comprises a monitoring module, the monitoring module is integrated in the management control module, the monitoring module is connected to the control unit, and the monitoring module is connected to the lithium battery.

[0012] Preferably, the management unit comprises a power estimation subunit and a data acquisition subunit, and the power estimation subunit is connected to the data acquisition subunit; The data acquisition subunit acquires parameters of the lithium battery, and the power estimation subunit estimates the power of the lithium battery according to the parameters acquired by the data acquisition subunit.

[0013] In a second aspect, the present invention discloses a lithium battery dedicated to a centralized power supply, which includes the above-mentioned lithium battery zero-volt emergency power replenishment system and a lithium battery pack.

[0014] In a third aspect, the present invention discloses a zero-volt emergency power replenishment method for a lithium battery, which is applicable to the above-mentioned zero-volt emergency power replenishment system for a lithium battery, and specifically comprises the following steps: The lithium battery is connected to an external activation system to detect the remaining power of the lithium battery. When the lithium battery is in a zero-volt state, the activation input module is connected to the external activation system, and the external activation system supplies power to the lithium battery. The external activation system supplies low voltage power to the lithium battery, and the external activation system detects the power value in the lithium battery in real time; When the power value in the lithium battery reaches a first threshold value preset by the external activation system, the lithium battery is disconnected from the external activation system, and the lithium battery is connected to a power source with a normal voltage value for charging.

[0015] Preferably, the steps of connecting the lithium battery to the external activation system include: The monitoring module in the lithium battery detects its own power level. The monitoring module presets a second threshold. When the power level is lower than the preset second threshold, the lithium battery stops normal input and output power and connects to the external activation system.

[0016] Preferably, the lithium battery is connected to an external activation system to detect the remaining power of the lithium battery. When the lithium battery is in a zero-volt state, the activation input module is connected to the external activation system, and the external activation system supplies power to the lithium battery, specifically including: The lithium battery is directly connected to the external activation system, which supplies power to the lithium battery. The external activation system directly detects or the monitoring module in the lithium battery detects the remaining power of the lithium battery after power is supplied to it. When the lithium battery is in a low power state and cannot normally supply power to the management control module, the external activation system supplies power to the lithium battery.

[0017] The above technical solution provided by this application has the following advantages compared with the prior art: The present application provides a zero-volt emergency power replenishment method and system for lithium batteries, and a lithium battery dedicated to a centralized power supply. The system mentions that when the lithium battery is in a zero-volt state, the activation input module is connected to the external activation system, and low-voltage and low-current power is supplied through the external activation system. When the external activation system is supplying low-voltage and low-current power, the external activation system detects and obtains lithium battery parameters, including real-time remaining power, voltage and other parameter values. When the lithium battery is charged to a remaining power threshold preset in the external activation system, the external activation system stops supplying low-voltage and low-current power to the lithium battery, and allows the lithium battery to supply power at a normal voltage value, thereby restoring the lithium battery to a normal state of use. At the same time, the BMS system is bypassed, and there is no need to disassemble the lithium battery for maintenance, thereby improving convenience.

[0018] The method mentions that when the lithium battery is in a zero-volt state, the lithium battery stops supplying power to the outside and stops charging the lithium battery through an external power supply. The lithium battery is connected to an external activation system through an activation input module. The external activation system directly supplies low-voltage and low-current power to the lithium battery, thereby allowing the lithium battery pack to resume normal use. The operator can restore the lithium battery to normal use by himself, avoiding disassembling the lithium battery for repair or sending it to after-sales for repair, which is more convenient to use.

[0019] The lithium battery dedicated to centralized power supply mentioned that a zero-volt emergency power replenishment system for lithium batteries is adopted. When the lithium battery is in a zero-volt state, an external activation system is directly used for low-voltage and low-current charging to restore the lithium battery to normal state and power the management unit. Then, the external power supply or load is connected through the input and output module for normal charging or power supply. There is no need to disassemble and repair or send it for repair. Users can control the recharging of the lithium battery by themselves. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0022] Figure 1 A module for a lithium battery zero-volt emergency power supply system provided in this application Figure 1 ; Figure 2 A module for a lithium battery zero-volt emergency power supply system provided in this application Figure 2 ; Figure 3 A module diagram of a management and control module of a lithium battery zero-volt emergency power replenishment system provided in this application; Figure 4 The steps of a zero-volt emergency charging method for lithium batteries provided in this application are as follows: Figure 1 ; Figure 5 The steps of a zero-volt emergency charging method for lithium batteries provided in this application are as follows: Figure 2 .

[0023] Description of reference numerals: 1. Lithium battery zero-volt emergency power supply system; 2. External activation system; 11. Management control module; 111, management unit; 1111, power estimation subunit; 1112, data acquisition subunit; 112. Control unit; 113. Wireless communication unit; 12. Activate the input module; 13. Switch the switch; 14. Input and output modules; 15. Monitoring module. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of this application clearer, the technical solutions in this application will be clearly and completely described below in conjunction with the drawings in this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0025] First, see Figure 1-3 The present invention discloses a zero-volt emergency power replenishment system 1 for lithium batteries, which is used to replenish power for lithium batteries in a zero-volt state. When a lithium battery is in a zero-volt state, the circuit inside the lithium battery cannot work normally due to the lack of normal power supply, and the external power supply cannot charge the lithium battery normally through the BMS system. At the same time, the lithium battery cannot provide external power through the BMS system. The lithium battery can be a single battery or a battery pack composed of multiple batteries.

[0026] The lithium battery zero-volt emergency power supply system 1 includes a management control module 11, an activation input module 12, and an input-output module 14. The management control module 11 is connected to the lithium battery, and the management control module 11 is connected to the input-output module 14. The management control module 11 monitors and controls the charging and discharging process of the lithium battery, obtains the parameters of the lithium battery, and detects the remaining power of the lithium battery. The activation input module 12 is connected to the external activation system 2 to supply low-voltage and low-current power to the lithium battery, and gradually restores the lithium battery to normal. The input of low voltage and low current can avoid damage to the lithium battery. The external activation system 2 obtains the lithium battery parameters in real time, and the lithium battery parameters include real-time remaining power, voltage, current and other data; when the lithium battery is in a zero-volt state, the activation input module 12 is connected to the external activation system 2 for low-voltage and low-current power supply. The external activation system 2 presets a remaining power threshold. According to the real-time remaining power of the lithium battery exceeding the remaining power threshold, the external activation system 2 stops supplying low-voltage and low-current power to the lithium battery.

[0027] Specifically, when the lithium battery is in a zero-volt state, the activation input module 12 is connected to the external activation system 2, and low-voltage and low-current power is supplied through the external activation system 2. When the external activation system 2 is supplying low-voltage and low-current power, the external activation system 2 detects and obtains lithium battery parameters, including real-time remaining power, voltage and other parameter values. When the lithium battery charging reaches the remaining power threshold preset in the external activation system 2, the external activation system 2 stops supplying low-voltage and low-current power to the lithium battery, and allows the lithium battery to supply power at a normal voltage value, so that the lithium battery can be restored to a normal state of use, and bypasses the management and control module 11 at the same time, and there is no need to disassemble the lithium battery for maintenance, thereby improving convenience. The external activation system 2 has a built-in charging circuit that can provide low-voltage and low-current power supply. The external activation system 2 has a built-in detection module that can detect the remaining power inside the connected lithium battery. Since the lithium battery is in a zero-volt state, and there are many reasons for being in a zero-volt state, a low-voltage and low-current power supply is required to ensure that the lithium battery can be restored to a normal state. It is impossible to supply power according to the normal voltage value of the input and output module 14 to avoid damage to the lithium battery.

[0028] As an embodiment, a control switch is provided inside the external activation system 2, and the control switch is used to connect or disconnect the external activation system to power the lithium battery. A control switch is provided inside the external activation system 2, and the control switch can realize power disconnection or normal power supply. According to the detection of the remaining power inside the connected lithium battery, the control module inside the external activation system 2 can start or shut down the control switch, so that after the power of the lithium battery is restored to a certain value, the external activation system 2 can automatically disconnect the power supply to the lithium battery, and the lithium battery is charged to a normal voltage value through the input and output module 14. In addition, the low power threshold can be customized, and when the power of the lithium battery is restored to exceed the threshold, the control switch can be disconnected.

[0029] As an embodiment, the external activation system 2 obtains the real-time remaining power of the lithium battery in real time. When the real-time remaining power is higher than the remaining power threshold, a signal is sent to notify the operator to stop the low-voltage and low-current power supply, so that the lithium battery can be charged at a normal voltage. The signal sent to notify the operator can be transmitted to the upper system by an electrical signal, an acoustic signal, an optical signal, etc.

[0030] In this embodiment, the activation input module 12 uses a Type-C interface and a serial port, wherein the Type-C interface is used for low-voltage and low-current power supply of the external activation system, and the serial port is used for the external activation system to receive data signals. However, the activation input module 12 is not limited to the combination of the Type-C interface and the serial port in this embodiment, and other interfaces that can simultaneously supply power and transmit data can be used.

[0031] As an embodiment, the activation input module 12 is only provided with one Type-C interface, that is, the external activation system is connected through a single Type-C interface to realize the two functions of charging and data transmission, thereby reducing the setting of interfaces.

[0032] As an embodiment, when the lithium battery is in a low power state and the management control module 11 cannot work normally, the external activation system 2 can be used to supply low voltage and low current to the lithium battery to restore it to a normal state, and then charge it normally through the input and output module 14.

[0033] As an example, see Figure 2 The lithium battery zero-volt emergency power supply system 1 includes a switching switch 13; the switching switch 13 is connected to the activation input module 12 or the input-output module 14, the switching switch 13 is connected to the lithium battery, and the input-output module 14 inputs power to the lithium battery or connects the lithium battery to output power.

[0034] It can be understood that when the lithium battery reaches a zero-volt state, the switching switch 13 disconnects the connection with the input-output module 14, stops the lithium battery from supplying power to the outside and stops charging the lithium battery through an external power supply, and the switching switch 13 connects the activation input module 12 with the lithium battery, and the activation input module 12 is connected to the external activation system 2, and the lithium battery is supplied with low voltage and low current through the external activation system 2, so that the lithium battery returns to a normal state of use, and bypasses the BMS system at the same time, there is no need to disassemble the lithium battery for maintenance, thereby improving convenience.

[0035] Optionally, the switching switch 13 adopts a mechanical switch or an electromagnetic switch. That is, the switching switch 13 can adopt a mechanical switch, which is switched by manual operation. When the lithium battery is low and needs to be powered by the external activation system 2, the switching switch 13 is manually operated to switch it to the position of connecting to the activation input module 12, and the external activation system 2 supplies power to the lithium battery. After the external activation system 2 charges the lithium battery for a certain period of time, the external activation system 2 detects that the lithium battery power reaches a certain value, and sends a signal to the operator to manually operate the switching switch 13 to switch to the position where the lithium battery is connected to the input-output module 14, so that the two are connected, and the lithium battery can be charged through the input-output module 14; the switching switch 13 can adopt an electromagnetic switch, and the lithium battery power is detected by the management control module 11, and the switching switch 13 is controlled to connect to the activation input module 12 or the input-output module 14 according to the lithium battery power. The electromagnetic switch can reduce manual participation and make the system more automated. In this embodiment, the switching switch 13 adopts an electromagnetic switch, but the switching switch 13 is not limited to using an electromagnetic switch.

[0036] As an embodiment, the input-output module 14 includes a positive terminal and a negative terminal, and the positive terminal and the negative terminal are connected to the positive and negative electrodes of the connection device corresponding to the positive and negative electrodes of the lithium battery.

[0037] The management control module 11 includes a management unit 111 and a control unit 112, wherein the management unit 111 is connected to the control unit 112, and the control unit 112 is connected to the switching switch 13, wherein the management unit 111 collects parameters of the lithium battery, including voltage value, current value, etc., and estimates the current battery power according to the parameters of the lithium battery, and the control unit 112 controls the charging and discharging of the battery, and transmits the data of the management unit 111 to the upper management system.

[0038] The system includes a monitoring module 15, which is integrated in the management control module 11, connected to the control unit 112, connected to the lithium battery, and used to monitor the health status of the lithium battery. The monitoring module 15 performs evaluation based on data collected by the management unit 111.

[0039] As an embodiment, when the activation input module 12 is connected to the external activation system 2, the monitoring module 15 can obtain power by connecting to the external activation system 2, that is, the monitoring module 15 can operate normally under the low-voltage and low-current power supply of the external activation system 2. The monitoring module 15 is connected to the switching switch 13. The monitoring module 15 determines whether the switching switch 13 needs to be switched to one end of the input-output module 14 based on the power value obtained in the detection management control module 11, so that the lithium battery can be charged at a normal voltage value to achieve a degree of automation.

[0040] As an embodiment, a low power threshold value may be preset in the monitoring module 15. When the management unit 111 detects that the current remaining power of the battery is lower than the low power threshold value, the switching switch 13 is switched to the activation input module 12 through an electrical signal, the lithium battery is connected to the activation input module 12, and the connection between the lithium battery and the input-output module 14 is disconnected, so that the lithium battery is connected to the external activation system 2 for charging. Subsequently, the lithium battery is depleted after being placed for a long time and is in a zero-volt state. The external activation system 2 is directly connected to the activation input module 12 to provide voltage supply to the lithium battery. At the same time, a low-voltage and low-current power supply threshold value is preset in the monitoring module 15. When the external activation system 2 provides low-voltage and low-current power supply to the lithium battery, the monitoring module 15 detects that the power of the lithium battery exceeds the low-voltage and low-current power supply threshold value, and controls the switching switch 13 to disconnect from the activation input module 12 and connect the input-output module 14, so that the lithium battery obtains power through the input-output module 14.

[0041] The management unit 111 includes a power estimation subunit 1111 and a data acquisition subunit 1112. The power estimation subunit 1111 is connected to the data acquisition subunit 1112. The data acquisition subunit 1112 acquires parameters of the lithium battery. The power estimation subunit 1111 estimates the power of the lithium battery according to the parameters acquired by the data acquisition subunit 1112.

[0042] Specifically, the data acquisition subunit 1112 is connected to the lithium battery and acquires the parameters of the lithium battery in real time, including voltage, current, temperature and other parameters. The power estimation subunit 1111 estimates the power of the lithium battery according to the parameters acquired by the data acquisition subunit 1112, and determines the current remaining power of the lithium battery. The management unit 111 is a battery management system (BMS), which is used to monitor the voltage, current, temperature and other parameters of the battery, estimate the power state of the lithium battery, ensure that the battery operates within a safe working range, and prevent abnormal conditions such as overcharging, over-discharging, over-temperature and over-current of the battery, thereby extending the service life of the battery and improving the performance of the battery.

[0043] The management control module 11 includes a wireless communication unit 113, and the wireless communication unit 113 is connected to the control unit 112. Specifically, the wireless communication unit 113 can transmit the information in the management control module 11 to the upper management system through wireless signals, and transmit the remaining power of the lithium battery and the parameters of the lithium battery obtained in the management control module 11 to the upper management system, so as to obtain the status of the lithium battery in real time.

[0044] Optionally, the wireless communication unit 113 adopts any one of Bluetooth connection, WiFi connection, ZigBee, and 5G.

[0045] The management control module 11 includes a signal processing unit, which is connected to the control unit 112. The signal processing unit can transmit data signals to the upper management system through a connecting line. It can be understood that the signal processing unit can transmit the relevant information of the lithium battery through wired transmission. The signal processing unit can use a TYPE-C interface or a serial port.

[0046] The management control module 11 includes an indicator light, which is connected to the control unit. The indicator light is directly powered by a lithium battery. The indicator light can show the operator whether the low-voltage and low-current charging of the lithium battery in the zero-volt state is successful. When the lithium battery returns to normal from the zero-volt state, the indicator light lights up to remind the operator to disconnect the external activation system and connect a power supply with a normal voltage value through the input and output module to charge the lithium battery.

[0047] In the second aspect, the present invention discloses a dedicated lithium battery for centralized power supply, which includes the above-mentioned lithium battery zero-volt emergency power supply system and a lithium battery pack. The dedicated lithium battery for centralized power supply is installed in the centralized power supply of fire emergency equipment to provide power for the centralized power supply.

[0048] Specifically, a lithium battery zero-volt emergency power replenishment system is adopted. When the lithium battery is in a zero-volt state, an external activation system is directly used to perform low-voltage and low-current charging to restore the lithium battery to a normal state and power the management unit. Then, the external power supply or load is connected through the input and output module to perform normal charging or power supply. There is no need to disassemble and repair or send it for repair. The user can control the recharging of the lithium battery by himself.

[0049] Among them, the management control module, input and output module, activation input module, switching switch, and monitoring module are integrated on the same circuit board, which improves the degree of product integration and reduces the occupation of internal space.

[0050] As an embodiment, when a switching switch is provided for the lithium battery dedicated to the centralized power supply, the switching switch can switch the lithium battery to access the activation input module or the input-output module.

[0051] As an embodiment, the positive terminal and the negative terminal are provided by copper pillars, which can reduce the connection lines between the input and output modules and the circuit board and reduce the production cost of the equipment.

[0052] Thirdly, see Figure 4-5 The present invention discloses a zero-volt emergency power replenishment method for a lithium battery, which is applicable to the above-mentioned zero-volt emergency power replenishment system for a lithium battery, and specifically comprises the following steps: Step S1: The monitoring module in the lithium battery detects its own power level. The monitoring module presets a second threshold. When the power level is lower than the preset second threshold, the lithium battery stops normal input and output power and connects to the external activation system.

[0053] Step S2: the lithium battery is connected to an external activation system to detect the remaining power of the lithium battery. When the lithium battery is in a zero volt state, the activation input module is connected to the external activation system, and the external activation system supplies power to the lithium battery. Step S3: the external activation system supplies low voltage power to the lithium battery, and the external activation system detects the power value in the lithium battery in real time; Step S4: When the power value in the lithium battery reaches a first threshold value preset by the external activation system, the lithium battery is disconnected from the external activation system and connected to a power source with a normal voltage value for charging.

[0054] Specifically, in step S1, the monitoring module of the lithium battery itself periodically detects its own power. When the power is lower than the second threshold, the normal input and output power can be stopped. The normal input and output power can be stopped by switching the lithium battery access port through the switching switch, so that the lithium battery is disconnected from the normal charging and discharging through the BMS system, and is charged by an external power supply instead. That is, before the lithium battery is about to enter a low-power state or a zero-volt state, it is switched to a state of external power charging, so that the lithium battery can be directly connected to the external power supply for power supply later, avoiding manual switching and achieving the purpose of automatic switching. In addition, when an automated structure is adopted, an electromagnetic switch is provided inside, which can be switched to an external power supply for charging in advance when the lithium battery enters a zero-volt state. Furthermore, when it is detected that the battery has entered a low-power state or is about to enter a zero-volt state, an electrical signal can be sent to the upper system or an audible and visual signal can be issued for early warning, so that the operator can be informed of the current state of the lithium battery and charge the lithium battery.

[0055] Specifically, in step S2, the conditions for the intervention of the external activation system are clarified, that is, when the lithium battery power is so low that it affects the operation of the BMS system, it starts to supply power. The external activation system itself has the function of detecting the power level. When the lithium battery is in a low power state or even a zero volt state, the external activation system charges the lithium battery with a low voltage and a small current to restore the lithium battery to a normal state, allowing the BMS system and other control modules to operate normally.

[0056] Specifically, in step S3, the external activation system detects the lithium battery, which can ensure dynamic monitoring of the lithium battery power during the power supply process so as to timely grasp the power recovery status.

[0057] Specifically, in step S4, when the power in the lithium battery reaches the preset first threshold, the lithium battery can provide normal operation for the BMS system and other control modules. At this time, the lithium battery no longer needs to be charged by the low-voltage and low-current power supply of the external activation system, but can be charged by a power supply with a normal voltage value, thereby speeding up the charging of the lithium battery and fully charging the lithium battery.

[0058] It can be understood that when the lithium battery is in a zero-volt state, the lithium battery is disconnected from the input and output module, the lithium battery stops supplying power to the outside and stops charging the lithium battery through an external power supply, the lithium battery is connected to the activation input module, and the activation input module is connected to the external activation system to directly supply low-voltage and low-current power to the lithium battery, so that the lithium battery pack can be restored to normal use. The operator can restore the lithium battery to normal use by himself, avoiding disassembling the lithium battery for repair or sending it to after-sales for repair, which is more convenient to use.

[0059] As an embodiment, the switching switch of the lithium battery can switch the port connected to the lithium battery through manual operation. Under manual operation, the lithium battery can be powered by an external power supply voltage or charged and discharged at the normal voltage of the input and output module.

[0060] As an embodiment, a special power detection device, that is, an external activation system, is provided outside the lithium battery, so as to detect the power of the lithium battery simultaneously with the internal monitoring module of the lithium battery. When the external detection device detects that the power is lower than the preset second threshold, the lithium battery is forced to switch to the state of connection with the external activation system through the external control circuit, rather than relying solely on the automatic switching mechanism inside the lithium battery. It can be understood that the external activation system can be connected to the outside of the lithium battery for a long time, so as to detect the power value and related parameters of the lithium battery by external detection for a long time.

[0061] As an embodiment, a monitoring module is set inside the lithium battery, and a low-voltage and low-current power supply is provided through an external activation system. The monitoring module can operate normally. The monitoring module detects the power of the lithium battery itself. When the power of the lithium battery exceeds a first threshold, the control switching switch is switched to a position connected to the input-output module, so that the lithium battery can be connected to a power supply with a normal voltage value for charging.

[0062] As an embodiment, when the power of the lithium battery reaches a preset first threshold, multiple parameters of the lithium battery are tested and confirmed again, such as power stability, BMS system status, etc. Only when all parameters meet the normal power supply requirements, the connection with the external activation system is disconnected and a power supply with a normal voltage value is connected to improve safety.

[0063] Step S2 specifically includes: Step S21: the lithium battery is directly connected to the external activation system, the external activation system is used to power the lithium battery, and the external activation system directly detects or the monitoring module in the lithium battery is powered on to detect the remaining power of the lithium battery; Step S22: When the lithium battery is in a low power state and cannot normally power the BMS system, an external activation system powers the lithium battery.

[0064] It can be understood that after the lithium battery is connected to the external activation system, the external activation system detects the power of the lithium battery instead of directly supplying power to the lithium battery. When the external activation system detects that the lithium battery is insufficient to maintain the normal operation of the BMS system, the external activation system supplies power to the lithium battery. That is, the external activation system detects various parameters of the lithium battery, determines its health status, and confirms whether the lithium battery meets the requirements for low-voltage and low-current charging, thereby ensuring the safety of the operation process.

[0065] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0066] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0067] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0068] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be connected, detachably connected, or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms should not be understood as necessarily referring to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification.

[0071] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

[0072] The above is a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A lithium battery zero-volt emergency power supply system, characterized in that: comprising an activation input module, wherein the activation input module is connected to the lithium battery; The activation input module is used to connect to an external activation system to provide low-voltage power to the lithium battery. The external activation system obtains lithium battery parameters in real time during the power supply process, and the lithium battery parameters include real-time remaining power; When the lithium battery is in a zero-volt state, the activation input module is connected to an external activation system for low-voltage power supply. The external activation system presets a remaining power threshold. When the real-time remaining power of the lithium battery exceeds the remaining power threshold, the external activation system stops providing low-voltage power supply to the lithium battery.

2. The system according to claim 1, characterized in that It includes a management control module and an input-output module, wherein the management control module is connected to the lithium battery, and the management control module is connected to the input-output module; The input-output module inputs power to the lithium battery or connects to the lithium battery to output power, and the management control module monitors and controls the battery charging and discharging process.

3. The system according to claim 2, characterized in that It includes a switching switch, the switching switch is respectively connected to the activation input module or the management control module; When the lithium battery is in a zero-volt state, the switching switch disconnects the input-output module, and connects the activation input module to connect the lithium battery to an external activation system for low-voltage power supply.

4. The system according to claim 2, characterized in that The management control module includes a management unit, a control unit and a wireless communication unit. The management unit is connected to the control unit, the control unit is connected to a switch, and the wireless communication unit is connected to the control unit.

5. The system according to claim 3, characterized in that It includes a monitoring module, which is integrated in the management control module, connected to the control unit, and connected to the lithium battery.

6. The system according to claim 4, characterized in that The management unit includes a power estimation subunit and a data acquisition subunit, and the power estimation subunit is connected to the data acquisition subunit; The data acquisition subunit acquires parameters of the lithium battery, and the power estimation subunit estimates the power of the lithium battery according to the parameters acquired by the data acquisition subunit.

7. A lithium battery for centralized power supply, characterized in that: A lithium battery zero-volt emergency power replenishment system and a lithium battery pack comprising any one of claims 1 to 6 above.

8. A zero-volt emergency power replenishment method for a lithium battery, applicable to the zero-volt emergency power replenishment system for a lithium battery according to any one of claims 1 to 6, characterized in that: The specific steps include: The lithium battery is connected to an external activation system to detect the remaining power of the lithium battery. When the lithium battery is in a zero-volt state, the activation input module is connected to the external activation system, and the external activation system supplies power to the lithium battery. The external activation system supplies low voltage power to the lithium battery, and the external activation system detects the power value in the lithium battery in real time; When the power value in the lithium battery reaches a first threshold value preset by the external activation system, the lithium battery is disconnected from the external activation system, and the lithium battery is connected to a power source with a normal voltage value for charging.

9. The method according to claim 8, characterized in that The following steps are included before the lithium battery is connected to the external activation system: The monitoring module in the lithium battery detects its own power level. The monitoring module presets a second threshold. When the power level is lower than the preset second threshold, the lithium battery stops normal input and output power and connects to the external activation system.

10. The method according to claim 8, characterized in that The lithium battery is connected to an external activation system to detect the remaining power of the lithium battery. When the lithium battery is in a zero-volt state, the activation input module is connected to the external activation system, and the external activation system supplies power to the lithium battery, specifically including: The lithium battery is directly connected to the external activation system, which supplies power to the lithium battery. The external activation system directly detects or the monitoring module in the lithium battery detects the remaining power of the lithium battery after power is supplied to it. When the lithium battery is in a low power state and cannot normally supply power to the management control module, the external activation system supplies power to the lithium battery.

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