Lithium battery pack and lithium battery device

Abstract

The utility model discloses a lithium battery pack and a lithium battery device, which are applied to the technical field of lithium battery packs, the lithium battery pack comprises a switching module, an awakening module and a first control module, the switching module is used for transmitting voltage of an external power supply module to the awakening module; when the voltage of the external power supply module is greater than a preset voltage threshold, a wake-up signal is output to the first control module, and then the first control module wakes up the lithium battery pack based on the wake-up signal. Therefore, the voltage of the external power supply module is transmitted to the wake-up module, and the wake-up module outputs the wake-up signal to the first control module when the voltage of the external power supply module is greater than the preset voltage threshold value, so that the first control module wakes up the lithium battery pack based on the wake-up signal, the lithium battery pack can continue to supply power, and automatic activation is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery pack technical field especially relates to a lithium battery pack and lithium battery device. BACKGROUND

[0002] With the rapid development of lithium battery pack technology, the automation management of battery system is realized, and the intelligentization of battery system monitoring is an important trend of the development of lithium battery pack control system at present. Compared with the traditional lead-acid battery, since lithium battery pack has the advantages of green environmental protection, no pollution, long cycle life, high energy density, can discharge large current and the like, lithium battery pack has been widely used in communication base station. At the same time, in order to reduce the static power consumption of lithium battery pack, prevent the BMS (Battery Management System, battery management system) from consuming the power in lithium battery pack when warehousing and transportation or not working, usually let lithium battery pack automatically enter sleep mode to reduce power consumption when warehousing and transportation or not working, but lithium battery pack needs to be activated by loading external activation signal to enter normal working mode after being in sleep mode, so that lithium battery pack can continue to supply power. At present, the external power module needs to detect the voltage of lithium battery pack to output voltage, when lithium battery pack enters sleep mode, lithium battery pack has no voltage, and the external power module cannot activate lithium battery pack, resulting in that lithium battery pack cannot supply power. Although a key switch can be used to load external activation signal to wake up lithium battery pack, but this way needs to press the external activation signal manually, and cannot realize automatic activation. SUMMARY

[0003] The utility model aims at providing a lithium battery pack and lithium battery device, can wake up lithium battery pack in sleep state, so that lithium battery pack can continue to supply power, realizes automatic activation.

[0004] In order to solve the above technical problem, the utility model provides a lithium battery pack, including battery body and first control module, still including switching module and wake -up module;

[0005] The input of switching module is connected with external power module, and the output is connected with the first end of wake -up module, is used for transmitting the voltage of external power module to wake -up module;

[0006] The second end of wake -up module is connected with first control module, is used for outputting wake -up signal to first control module when the voltage of external power module is greater than preset voltage threshold value;

[0007] The first control module is used for waking up lithium battery pack based on wake -up signal.

[0008] Optionally, the wake-up module comprises a first resistor, an optocoupler, a first diode, a second diode, a third diode and a detection interface.

[0009] A first end of the first resistor is connected with a positive output end of the adapter module, and a second end of the first resistor is connected with a positive input end of the optocoupler.

[0010] A negative input end of the optocoupler is connected with an anode of the first diode, an emitter of the optocoupler is connected with a direct current, and a collector of the optocoupler is connected with a common end of an anode of the second diode and an anode of the third diode.

[0011] A cathode of the first diode is connected with a negative output end of the adapter module.

[0012] A cathode of the second diode is connected with the first control module.

[0013] A cathode of the third diode is connected with the detection interface.

[0014] The detection interface is used for detecting whether the external power module is online.

[0015] Optionally, the wake-up module further comprises a second resistor, a voltage stabilizing diode and a third resistor.

[0016] A first end of the second resistor is connected with a second end of the first resistor, and a second end of the second resistor is connected with the positive input end of the optocoupler.

[0017] An anode of the voltage stabilizing diode is connected with the negative output end of the adapter module, and a cathode of the voltage stabilizing diode is connected with the cathode of the first diode.

[0018] A first end of the third resistor is connected with a common end of the third diode and the detection interface, and a second end of the third resistor is grounded.

[0019] Optionally, a second control module is further included, a first end of the second control module is connected with the wake-up module, a second end of the second control module is connected with a battery body, and the second control module is used for waking up the lithium battery pack based on the wake-up signal, and releasing an under-voltage protection state when the lithium battery pack is not in a sleep mode and a minimum single cell voltage of a battery cell is greater than a protection value.

[0020] Optionally, the second control module comprises a discharge MOS tube and a control chip.

[0021] A gate of the discharge MOS tube is connected with a second end of the control chip, a source of the discharge MOS tube is connected with the battery body, and a drain of the discharge MOS tube is connected with the wake-up module.

[0022] The first end of the control chip is connected with the wake-up module, and is configured to wake up the battery body based on the wake-up signal, and control the discharge MOS tube to be turned on for a preset time when the lithium battery pack is not in a sleep mode but in an under-voltage protection state and the lowest single cell voltage is greater than a protection value, and the under-voltage protection state is released when a charging current is detected within the preset time.

[0023] Optionally, the adapter module comprises a first interface and a second interface.

[0024] The first interface is connected with the external power module.

[0025] The second interface is connected with the wake-up module.

[0026] Optionally, the adapter module further comprises a third interface, and the third interface is connected with the first interface of the adapter module of the next lithium battery pack.

[0027] Optionally, the positive electrode of the third interface is connected with the positive electrode of the first interface and the positive electrode of the second interface, and the negative electrode of the third interface is connected with the negative electrode of the first interface and the negative electrode of the second interface.

[0028] To solve the above technical problems, the utility model further provides a lithium battery device, including multiple groups of lithium battery packs as above, the first interface of the first group of lithium battery packs is connected with the external power module, the third interface of the first group of lithium battery packs is connected with the first interface of the next group of lithium battery packs, the third interface of the last group of lithium battery packs is connected with the first interface of the next group of lithium battery packs.

[0029] The application provides a lithium battery pack and a lithium battery device. The lithium battery pack comprises an adapter module, a wake-up module and a first control module. The adapter module is configured to transmit the voltage of an external power module to the wake-up module, so as to output a wake-up signal to the first control module when the voltage of the external power module is greater than a preset voltage threshold. Then, the first control module wakes up the lithium battery pack based on the wake-up signal. As can be seen, the voltage of the external power module is transmitted to the wake-up module, the wake-up module outputs a wake-up signal to the first control module when the voltage of the external power module is greater than a preset voltage threshold, and the first control module wakes up the lithium battery pack based on the wake-up signal, so that the lithium battery pack can continue to supply power and realize automatic activation. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the prior art and embodiments, obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0031] Figure 1 A structure schematic diagram of a lithium battery pack and an external power module is provided in the present application.

[0032] Figure 2 A principle diagram of a wake-up module is provided in the present application.

[0033] Figure 3 A structure schematic diagram of a switching module is provided in the present application.

[0034] Figure 4 A structure schematic diagram of a lithium battery device and an external power module is provided in the present application. DETAILED DESCRIPTION

[0035] The core of the present application is to provide a lithium battery pack and a lithium battery device, which can wake up the lithium battery pack in a dormant state, so that the lithium battery pack can continue to supply power and realize automatic activation.

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the following will combine the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application, obviously, the described embodiments are only some embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0037] In order to reduce the static power consumption of the lithium battery pack and prevent the BMS (Battery Management System, battery management system) from consuming the power in the lithium battery pack when it is in storage and transportation or not working, the lithium battery pack is usually automatically put into a dormant mode to reduce power consumption when it is in storage and transportation or not working, but the lithium battery pack needs to be activated by loading an external activation signal to enter a normal working mode after it is in the dormant mode, so that the lithium battery pack can continue to supply power. At present, the external power module needs to detect the voltage of the lithium battery pack to output voltage, and when the lithium battery pack enters the dormant mode, the lithium battery pack has no voltage, so the external power module cannot activate the lithium battery pack, resulting in that the lithium battery pack cannot supply power. Although a key switch can be used to load an external activation signal to wake up the lithium battery pack, this way needs to manually press the external activation signal, and cannot realize automatic activation.

[0038] Please refer to Figure 1 shown, Figure 1 The utility model provides a kind of lithium battery group and the structural schematic diagram of external power module.

[0039] The lithium battery group, including battery body and first control module 1, further include switching module 2 and wake-up module 3;

[0040] The input end of switching module 2 is connected with external power module 4, and the output end is connected with the first end of wake-up module 3, for transmitting the voltage of external power module 4 to wake-up module 3;

[0041] The second end of wake-up module 3 is connected with first control module 1, for outputting wake-up signal to first control module 1 when the voltage of external power module 4 is greater than preset voltage threshold;

[0042] First control module 1 is used to wake up lithium battery group based on wake-up signal.

[0043] The lithium battery group includes battery body, first control module 1, switching module 2 and wake-up module 3, specifically, first control module 1 and wake-up module 3 are arranged in BMS, switching module 2 includes two interfaces, one interface is connected with external power module 4, and the other interface is connected with wake-up module 3, external power module 4 can step-down and rectify alternating current to provide the required direct current for lithium battery group, the voltage of the direct current is the voltage of external power module 4, and the direct current is input from the interface connected with external power module 4 and output from the interface connected with wake-up module 3, when wake-up module 3 receives the direct current, it will judge the size relation between the voltage of external power module 4 and preset voltage threshold, if the voltage of external power module 4 is greater than preset voltage threshold, it is determined that external power module 4 is online, wake-up module 3 will output wake-up signal to first control module 1, and BMS will automatically wake up lithium battery group, if the minimum single cell voltage of lithium battery group after wake-up is greater than protection value, BMS can normally output voltage, and lithium battery group can normally power supply, at this time, first control module 1 can control to close wake-up module 3, to avoid repeated wake-up, and realize the intelligentization of lithium battery group work. Wherein, the lithium battery group can be 48V lithium battery group, and 48V is the nominal voltage value of lithium battery group, considering the measurement error and environmental influence and other factors, so preset voltage threshold can be 46V, and the protection value of the cell of lithium battery group can be 2.7V.

[0044] It can be seen that, by transmitting the voltage of external power module 4 to wake-up module 3, wake-up module 3 outputs wake-up signal to first control module 1 when the voltage of external power module 4 is greater than preset voltage threshold, so that first control module 1 wakes up lithium battery group based on wake-up signal, so that lithium battery group can continue to power supply, and automatic activation is realized.

[0045] On the basis of the above embodiments:

[0046] As an optional embodiment, the wake-up module 3 comprises a first resistor R1, an optical coupler UR, a first diode D1, a second diode D2, a third diode D3 and a detection interface Power OFF;

[0047] The first end of the first resistor R1 is connected with the positive output end of the adapter module 2, and the second end of the first resistor R1 is connected with the positive input end of the optical coupler UR;

[0048] The negative input end of the optical coupler UR is connected with the anode of the first diode D1, the emitter of the optical coupler UR is connected with a direct current, and the collector of the optical coupler UR is connected with the common end of the anode of the second diode D2 and the anode of the third diode D3;

[0049] The cathode of the first diode D1 is connected with the negative output end of the adapter module 2;

[0050] The cathode of the second diode D2 is connected with the first control module 1;

[0051] The cathode of the third diode D3 is connected with the detection interface Power OFF;

[0052] The detection interface Power OFF is used for detecting whether the external power module 4 is online.

[0053] Specifically, when the wake-up module 3 receives a direct current, the wake-up module 3 judges the size relationship between the voltage of the external power module 4 and a preset voltage threshold value, if the detection interface Power OFF of the wake-up module 3 monitors that the voltage of the external power module 4 is greater than the preset voltage threshold value, it is determined that the external power module 4 is online, the wake-up module 3 will output a wake-up signal to the first control module 1, and the BMS will automatically wake up the lithium battery pack,

[0054] Further, in order to improve the anti-interference ability, the photoelectric isolation technology is adopted in the wake-up module 3, and the optical coupler UR is arranged in the wake-up module 3, the optical coupler UR comprises a light emitting source and a light receiver, the light emitting source and the light receiver are assembled in the same closed shell and are isolated from each other by a transparent insulator. The pin of the light emitting source is the input end, the pin of the light receiver is the output end, the light emitting source can be a light emitting diode, and the light receiver can be a photosensitive diode or a photosensitive triode. Specifically, please refer to the principle diagram of the wake-up module shown in the figure. Figure 2 Figure 2 The principle diagram of the wake-up module provided by the utility model.

[0055] ​Since the optical coupler UR has three functions: light emission, light reception, and signal amplification, when the voltage of the external power supply module 4 is transmitted to the wake-up module 3, the input electrical signal will drive the light-emitting diode to emit light of a certain wavelength. The light received by the photodetector will generate a photocurrent, which will be further amplified and output, thus completing the electrical-optical-electrical conversion.

[0056] As can be seen, this embodiment utilizes the electro-optical-electro-electrical conversion characteristics of the optocoupler UR to achieve signal isolation and transmission using optical methods, which can effectively prevent electrical interference.

[0057] As an optional embodiment, the wake-up module 3 further includes a second resistor R2, a Zener diode Z, and a third resistor R3;

[0058] The first end of the second resistor R2 is connected to the second end of the first resistor R1, and the second end of the second resistor R2 is connected to the positive input terminal of the optocoupler UR.

[0059] The anode of Zener diode Z is connected to the negative output terminal of adapter module 2, and the cathode of Zener diode Z is connected to the cathode of first diode D1.

[0060] The first end of the third resistor R3 is connected to the common terminal of the third diode D3 and the detection interface Power OFF, and the second end of the third resistor R3 is grounded.

[0061] In this embodiment, considering the potential presence of parasitic capacitance at the input of the optocoupler UR, which could affect the normal signal transmission of the optocoupler UR, a second resistor R2 is provided between the positive and negative input terminals of the optocoupler UR. Even if parasitic capacitance exists at the input of the optocoupler UR and stores charge, the second resistor R2 will quickly discharge the charge within the parasitic capacitance, preventing the turn-on voltage of the LED from being reached, allowing the LED to switch on and off normally. When the light source of the optocoupler UR is an LED, the reverse breakdown voltage of the LED is typically low, usually only around 6V. To prevent the optocoupler UR from breaking down when the input voltage is high, a Zener diode Z is connected in series at the negative input terminal of the optocoupler UR. This effectively limits the input voltage, preventing it from exceeding the withstand voltage range of the optocoupler UR, thereby protecting the optocoupler UR. Furthermore, to effectively suppress noise and protect signal transmission from interference, a third resistor R3 is also provided at the Power OFF detection interface in this embodiment.

[0062] It can be seen that the second resistor R2 is arranged between the positive input end and the negative input end of the optical coupler UR, the charge stored in the parasitic capacitor can be discharged when the parasitic capacitor exists at the input end of the optical coupler UR, the normal work of the optical coupler UR is ensured, a zener diode Z is connected in series at the negative input end of the optical coupler UR, the voltage of the input end can be effectively limited to avoid exceeding the voltage resistance range of the optical coupler UR, so that the optical coupler UR is protected, and the third resistor R3 is arranged at the detection interface Power OFF, and the anti-interference ability of signal transmission is improved.

[0063] As an optional embodiment, the second control module is further included, a first end of the second control module is connected with the wake-up module 3, and a second end of the second control module is connected with the battery body, and the second control module is used for waking up the lithium battery pack based on the wake-up signal, and the under-voltage protection state is released when the lithium battery pack is not in the sleep mode and is in the under-voltage protection state and the minimum single cell voltage of the battery cell is greater than the protection value.

[0064] Specifically, the second control module is arranged in the BMS, when the second control module receives the wake-up signal output by the wake-up module 3, the BMS will automatically wake up the lithium battery pack, when the lithium battery pack is not in the sleep mode and is in the under-voltage protection state, if the minimum single cell voltage of the lithium battery pack after being woken up is greater than the protection value, the second control module will release the under-voltage protection state of the lithium battery pack, so that the lithium battery pack is charged by the external power module 4 when the battery voltage of the lithium battery pack is too low. It should be noted that the second control module and the first control module 1 can be one control module.

[0065] It can be seen that the second control module is further arranged, the under-voltage protection state is released when the lithium battery pack is not in the sleep mode and is in the under-voltage protection state and the minimum single cell voltage of the battery cell is greater than the protection value, so that the lithium battery pack is charged by the external power module 4 when the voltage of the lithium battery pack is too low.

[0066] As an optional embodiment, the second control module includes a discharge MOS tube and a control chip;

[0067] The gate of the discharge MOS tube is connected with the second end of the control chip, the source of the discharge MOS tube is connected with the battery body, and the drain of the discharge MOS tube is connected with the wake-up module 3;

[0068] The first end of the control chip is connected with the wake-up module 3, and is used for waking up the battery body based on the wake-up signal, and controlling the discharge MOS tube to be opened for a preset time when the lithium battery pack is not in the sleep mode and is in the under-voltage protection state and the minimum single cell voltage is greater than the protection value, and the under-voltage protection state is released when the charging current is detected within the preset time.

[0069] Specifically, when the control chip receives the wake-up signal output by the wake-up module 3, the BMS will automatically wake up the lithium battery pack. When the lithium battery pack is in the undervoltage protection state without entering the sleep mode, if the lowest single voltage of the lithium battery pack after waking up is greater than the protection value, the second control module will control the discharge MOS tube to forcibly open for a preset time, so that the external power module 4 can detect the battery voltage of the lithium battery pack. If the discharge current of the lithium battery pack is detected within the set time, it indicates that the battery voltage of the lithium battery pack is higher than the preset voltage threshold, and the lithium battery pack will enter the undervoltage protection state again. If no charging current of the lithium battery pack is detected within the preset time, and the external power module 4 is detected to be online, the protection is tried to be removed again after a preset delay time, so as to charge the lithium battery pack by using the external power module 4 when the voltage of the lithium battery pack is too low. The set time is less than the preset time. The preset time can be 15S, the set time can be 3S, and the preset delay time can be 20min.

[0070] It can be seen that when the lithium battery pack is in the undervoltage protection state without entering the sleep mode and the lowest single voltage is greater than the protection value, the control chip controls the discharge MOS tube to open for a preset time. If the lithium battery pack has a discharge current, it indicates that the battery voltage of the lithium battery pack is higher than the preset voltage threshold, and the lithium battery pack will enter the undervoltage protection state again.

[0071] As an optional embodiment, the switching module 2 includes a first interface 11 and a second interface 22.

[0072] The first interface 11 is connected with the external power module 4.

[0073] The second interface 22 is connected with the wake-up module 3.

[0074] Specifically, the switching module 2 includes a first interface 11 and a second interface 22, the first interface 11 is the input end of the switching module 2, the first interface 11 is connected with the external power module 4, used to receive the voltage of the external power module 4, and the voltage of the external power module 4 is transmitted to the wake-up module 3 through the second interface 22, i.e. the output end of the switching module 2.

[0075] It can be seen that the first interface 11 and the second interface 22 as the input end and the output end of the switching module 2 can transmit the voltage of the external power module 4 to the wake-up module 3.

[0076] As an optional embodiment, the switching module 2 further includes a third interface 33, and the third interface 33 is connected with the first interface 11 of the switching module 2 of the next lithium battery pack.

[0077] Specifically, considering that if a lithium battery pack is connected with an external power module 4, the number of required external power modules 4 is relatively large, therefore, the third interface 33 is arranged on the adapter module 2, the third interface 33 is connected with the first interface 11 of the adapter module 2 of the next lithium battery pack, so that multiple lithium battery packs can share one external power module 4, and the occupation of system resources is reduced.

[0078] It can be seen that the third interface 33 of the adapter module 2 is arranged, the third interface 33 is connected with the first interface 11 of the adapter module 2 of the next lithium battery pack, so that multiple lithium battery packs can share one external power module 4, the requirement for the number of external power modules 4 is reduced, and the resource utilization rate is improved.

[0079] As an optional embodiment, the positive electrode of the third interface 33 is connected with the positive electrode of the first interface 11 and the positive electrode of the second interface 22, and the negative electrode of the third interface 33 is connected with the negative electrode of the first interface 11 and the negative electrode of the second interface 22.

[0080] In order to make the voltage detected by the adapter module 2 of all lithium battery packs consistent with the size of the voltage of the external power module 4, the positive electrode of the third interface 33 of the adapter module 2 is connected with the positive electrode of the first interface 11 and the positive electrode of the second interface 22, and the negative electrode of the third interface 33 is connected with the negative electrode of the first interface 11 and the negative electrode of the second interface 22, so as to ensure that the size of the voltage output from the third interface 33 is consistent with the size of the voltage of the external power module 4. Figure 3 As shown in the specific embodiment, Figure 3 The utility model provides a kind of structure schematic diagram of adapter module.

[0081] It can be seen that the positive electrode of the third interface 33 of the adapter module 2 is connected with the positive electrode of the first interface 11 and the positive electrode of the second interface 22, and the negative electrode of the third interface 33 is connected with the negative electrode of the first interface 11 and the negative electrode of the second interface 22, so as to ensure that the size of the voltage output from the third interface 33 is consistent with the size of the voltage of the external power module 4, and improve the reliability of lithium battery pack.

[0082] The utility model further provides a kind of lithium battery device, including multiple groups as above-mentioned lithium battery pack, the first interface of first group lithium battery pack is connected with external power module 4, the third interface of first group lithium battery pack is connected with the first interface of next group lithium battery pack, the third interface of last group lithium battery pack is connected with the first interface of next group lithium battery pack.

[0083] Specifically, the lithium battery device includes all lithium battery groups in the same communication site, all the lithium battery groups are divided into N groups of lithium battery groups, the external power module 4 is connected with the first interface of the first group of lithium battery groups, the third interface of the first group of lithium battery groups is connected with the first interface of the next group of lithium battery groups, the third interface of the last group of lithium battery groups is connected with the first interface of the next group of lithium battery groups. Figure 4 Figure 4 The lithium battery device provided by the utility model and the structural diagram of the external power module are shown, wherein the lithium battery device includes N groups of lithium battery groups, the external power module 4 is a switching power supply, and the switching power supply is connected with the first interface of the first group of lithium battery groups through a 48V activation line.

[0084] In addition, the lithium battery device provided by the utility model is introduced, and the embodiments of the lithium battery group are referred to above, and the utility model will not be described here.

[0085] It can be seen that the voltage of the external power module 4 is transmitted to the wake-up module 3, the wake-up module 3 outputs a wake-up signal to the first control module 1 when the voltage of the external power module 4 is greater than the preset voltage threshold, so that the first control module 1 wakes up the lithium battery group based on the wake-up signal, so that the lithium battery group can continue to supply power, and automatic activation is realized.

[0086] The embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device disclosed by the embodiment, since it corresponds to the method disclosed by the embodiment, the description is relatively simple, and the related parts are referred to the method part.

[0087] The skilled person can further realize that the units and algorithm steps of each example described in combination with the embodiments disclosed in the present text can be realized in electronic hardware, computer software or combination of both, in order to clearly show the interchangeability of hardware and software, the composition and steps of each example have been described in the above description. The functions are described in general. Whether the functions are executed in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the utility model.

[0088] ​The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A lithium battery pack comprising a battery body and a first control module, characterized in that, The adapter module and the wake-up module are further included; The input end of the adapter module is connected with an external power module, and the output end is connected with the first end of the wake-up module, for transmitting the voltage of the external power module to the wake-up module; The second end of the wake-up module is connected with the first control module, for outputting a wake-up signal to the first control module when the voltage of the external power module is greater than a preset voltage threshold; The first control module is used for waking up the lithium battery pack based on the wake-up signal.

2. The lithium battery of claim 1, wherein, The wake-up module includes a first resistor, an optical coupler, a first diode, a second diode, a third diode and a detection interface; The first end of the first resistor is connected with the positive output end of the adapter module, and the second end of the first resistor is connected with the positive input end of the optical coupler; The negative input end of the optical coupler is connected with the anode of the first diode, the emitter of the optical coupler is connected with a direct current, and the collector of the optical coupler is connected with the common end of the anode of the second diode and the anode of the third diode; The cathode of the first diode is connected with the negative output end of the adapter module; The cathode of the second diode is connected with the first control module; The cathode of the third diode is connected with the detection interface; The detection interface is used for detecting whether the external power module is online.

3. The lithium battery of claim 2, wherein the lithium metal anode is a lithium foil anode. The wake-up module further includes a second resistor, a voltage stabilizing diode and a third resistor; The first end of the second resistor is connected with the second end of the first resistor, and the second end of the second resistor is connected with the positive input end of the optical coupler; The anode of the voltage stabilizing diode is connected with the negative output end of the adapter module, and the cathode of the voltage stabilizing diode is connected with the cathode of the first diode; The first end of the third resistor is connected with the common end of the third diode and the detection interface, and the second end of the third resistor is grounded.

4. The lithium battery of any one of claims 1 to 3, wherein, A second control module is further included, the first end of the second control module is connected with the wake-up module, the second end of the second control module is connected with a battery body, for waking up the lithium battery pack based on the wake-up signal, and removing an under-voltage protection state when the lithium battery pack does not enter a sleep mode and the lowest single cell voltage of a battery cell is greater than a protection value.

5. The lithium battery of claim 4, wherein the lithium metal anode is a lithium foil anode. The second control module includes a discharge MOS tube and a control chip; The gate of the discharge MOS tube is connected with the second end of the control chip, the source of the discharge MOS tube is connected with the battery body, and the drain of the discharge MOS tube is connected with the wake-up module; The first end of the control chip is connected with the wake-up module, for waking up the battery body based on the wake-up signal, and controlling the discharge MOS tube to be turned on for a preset time when the lithium battery pack does not enter the sleep mode and is in the under-voltage protection state and the lowest single cell voltage is greater than the protection value, and removing the under-voltage protection state when a charging current is detected within the preset time.

6. The lithium battery of claim 1, wherein the lithium metal anode is a lithium foil anode. The adapter module includes a first interface and a second interface; The first interface is connected with the external power module; The second interface is connected with the wake-up module.

7. The lithium battery of claim 6, wherein the lithium metal anode is a lithium foil anode. The adapter module further comprises a third interface, which is connected with the first interface of the adapter module of the next lithium battery pack.

8. The lithium battery of claim 7, wherein the lithium metal anode is a lithium foil anode. The positive pole of the third interface is connected with the positive poles of the first interface and the second interface, and the negative pole of the third interface is connected with the negative poles of the first interface and the second interface.

9. A lithium battery device, characterized by, The application further provides a lithium battery pack system comprising a plurality of lithium battery packs as claimed in claim 6, wherein the first interface of the first lithium battery pack is connected with the external power module, the third interface of the first lithium battery pack is connected with the first interface of the next lithium battery pack, and the third interface of the last lithium battery pack is connected with the first interface of the next lithium battery pack.

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