Early warning method and system for water inflow of standby battery pack of communication base station and battery pack

Abstract

The invention belongs to the technical field of new energy, and relates to a communication base station standby battery pack water inflow extremely early warning method and system and a battery pack. The method comprises the following steps: acquiring temperature data and time data of each temperature sampling point by using each temperature sensor; calculating a temperature extreme value difference value and a temperature extreme value change rate according to the collected temperature data; counting and extracting the change range of the temperature extreme value difference value when the fault occurs, the duration corresponding to the change range of the temperature extreme value difference value, and the change range of the temperature extreme value change rate and the duration corresponding to the change range of the temperature extreme value change rate; setting a judgment condition corresponding to each fault early warning level; and determining the fault early warning level of the standby battery pack of the communication base station and sending the fault early warning level to the FSU controller for early warning. The temperature sensing temperature value jump identification is carried out by adopting the temperature extreme value change of the temperature sensor in the standby battery pack of the communication base station, the water inlet extremely early warning identification of the standby battery pack of the communication base station is completed, the cost is extremely low, and the accuracy is high.

Description

Technical Field

[0001] The present invention belongs to the field of new energy technology, and specifically relates to a very early warning method, system and battery pack for water ingress in a backup battery pack of a communication base station. Background Art

[0002] The backup battery packs in communication base stations provide emergency power during utility power outages and are directly related to communication security. These base station backup battery packs consist of a battery pack, an outer casing, a BMS control panel, and a temperature sensor. However, they lack sealing and are not waterproof. Water ingress and condensation are common when the equipment room leaks, the outdoor cabinet doors deform, or the indoor humidity is excessive. While the initial impact of water ingress or condensation is minimal, over time, they can gradually cause abnormal BMS temperature and voltage signal acquisition and communication failures. This can lead to corrosion of electrical components, short-circuiting of high-voltage wiring, and even thermal runaway of the battery due to arcing and heat release, resulting in significant economic losses and safety hazards for the base station.

[0003] Currently, the market lacks an effective early warning solution for water ingress in battery packs, and mainly relies on manual regular unpacking and visual inspection. This method not only has high operation and maintenance costs, but also makes it difficult to identify extremely early water ingress faults due to the inability to open the pack for long-term inspection, resulting in a high missed detection rate. If humidity or water immersion sensors are added, the battery pack design needs to be modified, which increases costs and conflicts with standardized operation and maintenance.

[0004] The evolutionary cycle of severe battery failures caused by water ingress provides a window for extremely early warning. If early warning and intervention can be achieved at the initial stage of water ingress or condensation, subsequent cascading failures can be avoided, significantly reducing operation and maintenance costs. Therefore, communication base stations urgently need a low-cost, highly accurate, and extremely early warning solution for battery pack water ingress that does not change the existing design. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a very early warning method, system and battery pack for water ingress in a backup battery pack of a communication base station.

[0006] In a first aspect, the present invention provides a very early warning method for water ingress in a backup battery pack of a communication base station, comprising: Several temperature sensors are installed in the base station backup battery pack. The BMS and FSU controller complete low-voltage power-up, and the FSU controller runs. The FSU controller uses each temperature sensor to collect temperature data and time data at each temperature sampling point; the temperature data includes the maximum and minimum temperature values. When moisture enters the base station backup battery pack, the temperature sensor short-circuits and the temperature jumps. The BMS calculates the temperature extreme value difference and the temperature extreme value change rate based on the collected temperature data. The BMS collects and extracts the duration of the temperature extreme value difference change range and the temperature extreme value difference change range, as well as the duration of the temperature extreme value change rate change range and the temperature extreme value change rate change range when the base station backup battery pack fails. The BMS sets the judgment conditions corresponding to each fault warning level based on the change range of the temperature extreme value difference, the duration corresponding to the change range of the temperature extreme value difference, the change range of the temperature extreme value change rate, and the duration corresponding to the change range of the temperature extreme value change rate. The BMS determines the fault warning level of the backup battery pack of the communication base station based on the temperature data collected by the temperature sensor, the judgment conditions corresponding to each fault warning level, and the range of the effective temperature value of the temperature sensor, and sends it to the FSU controller for warning.

[0007] In a second aspect, the present invention provides an extremely early warning system for water ingress in a backup battery pack of a communication base station, comprising: Several temperature sensors, BMS and FSU controllers installed in the base station backup battery pack; After the BMS and FSU controllers complete low-voltage power-up, the FSU controller starts running and uses various temperature sensors to collect temperature data and time data at each temperature sampling point; the temperature data includes the maximum and minimum temperature values; When moisture enters the base station backup battery pack, the temperature sensor short-circuits and the temperature jumps. The BMS calculates the temperature extreme value difference and the temperature extreme value change rate based on the collected temperature data. The BMS collects and extracts the duration of the temperature extreme value difference change range and the temperature extreme value difference change range, as well as the duration of the temperature extreme value change rate change range and the temperature extreme value change rate change range when the base station backup battery pack fails. The BMS sets the judgment conditions corresponding to each fault warning level based on the change range of the temperature extreme value difference, the duration corresponding to the change range of the temperature extreme value difference, the change range of the temperature extreme value change rate, and the duration corresponding to the change range of the temperature extreme value change rate. The BMS determines the fault warning level of the backup battery pack of the communication base station based on the temperature data collected by the temperature sensor, the judgment conditions corresponding to each fault warning level, and the range of the effective temperature value of the temperature sensor, and sends it to the FSU controller for warning.

[0008] In a third aspect, the present invention provides a battery pack, including an extremely early warning system for water ingress in a backup battery pack of a communication base station.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, the temperature extreme value difference is the difference between the maximum value of the temperature of the single cell and the minimum value of the temperature of the single cell.

[0011] Furthermore, the temperature extreme value difference and the temperature extreme value change rate are calculated based on the collected temperature data, including: assuming the temperature extreme value is The minimum temperature is , the temperature extreme difference is The temperature extreme value change rate is , is time, then the temperature extreme value difference is: ; The rate of change of temperature extremes is: .

[0012] Furthermore, the judgment conditions corresponding to each fault warning level are set, including: if the temperature extreme value difference is greater than the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the temperature extreme value difference is greater than the first temperature value for a duration greater than the set duration, then the fault warning level is the first fault warning level; if the temperature extreme value difference is greater than or equal to the second temperature value and less than or equal to the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the temperature extreme value difference is greater than the second temperature value and less than or equal to the first temperature value for a duration greater than the set duration, then the fault warning level is the second fault warning level; the first temperature value is greater than the second temperature value.

[0013] Furthermore, the first temperature value is 10° C.; the second temperature value is 5° C.; the set threshold value of the temperature extreme value change rate is 0.5° C. / s; and the set time length is 2s.

[0014] Furthermore, the temperature sensor is an NTC temperature sensor.

[0015] Furthermore, when the BMS recognizes that the temperature extreme value change rate meets the corresponding judgment condition, it sends a water inlet fault flag message corresponding to the fault warning level to the FSU to complete the water inlet fault warning level push.

[0016] Furthermore, the range of the effective temperature value of the temperature sensor is -20°C to 80°C, and the fault warning level of the backup battery pack of the communication base station is determined only when the temperature data of all temperature sensors are effective values.

[0017] The beneficial effects of the present invention are: after analyzing a large amount of base station battery pack water ingress data, the present invention uses the temperature extreme value changes of the internal temperature sensor of the communication base station backup battery pack to identify the temperature sense temperature value jump, and then completes the extremely early warning identification of water ingress to the communication base station backup battery pack, by analyzing the water ingress failure and development evolution characteristics of a large amount of data after the communication base station backup battery pack is water ingressed, and at the same time combining the failure characteristics of the temperature sensor in the current base station backup battery system, a comprehensive analysis is performed, and the judgment conditions corresponding to the fault warning are set, and the water ingress fault warning identification is completed several days to several months before the electrical fault and thermal runaway fault. At the same time, the cost is extremely low and the accuracy is high, and it can effectively complete the extremely early warning identification before the electrical components such as batteries and BMS are corroded or fail due to water ingress, greatly reducing the cost of fault replacement and manual disposal caused by water ingress failure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the very early warning method for water ingress to a backup battery pack of a communication base station provided in Example 1 of the present invention; Figure 2 Flowchart for troubleshooting backup battery packs for communication base stations. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Example 1 As an example, Figure 1 As shown, to solve the above technical problems, this embodiment provides a very early warning method for water ingress in a backup battery pack of a communication base station, including: Several temperature sensors are installed in the base station backup battery pack. The BMS and FSU controller complete low-voltage power-up, and the FSU controller runs. The FSU controller uses each temperature sensor to collect temperature data and time data at each temperature sampling point; the temperature data includes the maximum and minimum temperature values. When moisture enters the base station backup battery pack, the temperature sensor short-circuits and the temperature jumps. The BMS calculates the temperature extreme value difference and the temperature extreme value change rate based on the collected temperature data. The BMS collects and extracts the duration of the temperature extreme value difference change range and the temperature extreme value difference change range, as well as the duration of the temperature extreme value change rate change range and the temperature extreme value change rate change range when the base station backup battery pack fails. The BMS sets the judgment conditions corresponding to each fault warning level based on the change range of the temperature extreme value difference, the duration corresponding to the change range of the temperature extreme value difference, the change range of the temperature extreme value change rate, and the duration corresponding to the change range of the temperature extreme value change rate. The BMS determines the fault warning level of the backup battery pack of the communication base station based on the temperature data collected by the temperature sensor, the judgment conditions corresponding to each fault warning level, and the range of the effective temperature value of the temperature sensor, and sends it to the FSU controller for warning.

[0021] The present invention analyzes the water ingress failure and development evolution characteristics of a large amount of data after water ingress to the backup battery pack of a communication base station. At the same time, combined with the failure characteristics of the temperature sensor in the current base station backup battery system, a comprehensive analysis is performed to set the judgment conditions corresponding to the fault warning, and complete the water ingress fault warning identification several days to months before the electrical failure and thermal runaway failure. It has the advantages of extremely low cost and high accuracy (water ingress warning accuracy > 98%). It can effectively complete extremely early warning identification before electrical components such as batteries and BMS are corroded or fail due to water ingress, greatly reducing the cost of fault replacement and manual disposal caused by water ingress failure.

[0022] The present invention analyzes a large amount of historical data on water-infiltrated battery packs, conducts a comprehensive comparative analysis of relevant collected signals in an artificially simulated battery pack water ingress spray test, and combines a comprehensive analysis with the design characteristics of relevant components such as sensor circuits to obtain an extremely early warning method for water ingress in base station backup battery packs based on the change characteristics of NTC temperature sensing values.

[0023] Optionally, the temperature extreme value difference is the difference between the maximum value of the single cell temperature and the minimum value of the single cell temperature.

[0024] Optionally, calculate the temperature extreme value difference and temperature extreme value change rate based on the collected temperature data, including: assuming the temperature extreme value is The minimum temperature is , the temperature extreme difference is The temperature extreme value change rate is , is time, then the temperature extreme value difference is: ; The rate of change of temperature extremes is: .

[0025] Optionally, determination conditions corresponding to each fault warning level are set, including: if the temperature extreme value difference is greater than the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the duration of the temperature extreme value difference being greater than the first temperature value is greater than the set duration, then the fault warning level is the first fault warning level; if the temperature extreme value difference is greater than or equal to the second temperature value and less than or equal to the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the duration of the temperature extreme value difference being greater than the second temperature value and less than or equal to the first temperature value is greater than the set duration, then the fault warning level is the second fault warning level; the first temperature value is greater than the second temperature value.

[0026] Optionally, the first temperature value is 10°C; the second temperature value is 5°C; the set threshold value of the temperature extreme value change rate is 0.5°C / s; and the set time is 2s. The fault diagnosis process is as shown in the attached Figure 2 The base station backup battery pack fault diagnosis flow chart shown in the figure specifically includes the following steps: calculating the temperature extreme value difference and the temperature extreme value change rate; if the temperature extreme value difference is greater than 10°C, the temperature extreme value change rate is greater than 0.5°C / s, and the temperature extreme value difference is greater than 10°C for a duration greater than 2 seconds, the fault warning level is the first fault warning level; if the temperature extreme value difference is greater than or equal to 5°C and less than or equal to 10°C, the temperature extreme value change rate is greater than the set threshold, and the temperature extreme value difference is greater than 5°C and less than or equal to 10°C for a duration greater than 2 seconds, the fault warning level is the second fault warning level.

[0027] Optionally, the temperature sensor is an NTC temperature sensor.

[0028] The base station backup battery pack can optionally use an NTC (Negative Temperature Coefficient) temperature sensor. An NTC is a thermistor whose resistance decreases rapidly as the temperature rises. It is typically manufactured by soldering a high-temperature sintered ceramic sheet to a low-voltage circuit and then encapsulating it with glue.

[0029] Because the base station backup battery pack has poor sealing and is basically not waterproof, when water enters the battery pack or condensation occurs, an external short circuit or internal water vapor intrusion short circuit may occur at the NTC temperature sensor glue connection, causing the ceramic resistor and circuit welding points to heat up, resulting in loose solder joints and poor internal resistance. The typical characteristic is that the temperature value of the temperature sensor frequently jumps up and down.

[0030] When an external condensation short circuit or internal moisture intrusion occurs at the water inlet of the NTC temperature sensor's potting structure, the initial symptoms are that the ceramic resistor inside the NTC temperature sensor heats up due to the external or internal short circuit, resulting in poor contact between the ceramic resistor and the solder. This in turn causes frequent changes in the internal resistance of the NTC temperature sensor, manifested as frequent and high-frequency jumps in the NTC temperature sensor's temperature value, which may fluctuate up and down multiple times within 1 second. (Temperature is a process variable, and in actual backup battery pack scenarios, the temperature change does not exceed 1°C per second.)

[0031] In the water ingress warning scheme of the present invention, since there are usually 4-5 temperature sensors in the base station backup battery pack, and when water or condensation occurs in the base station backup battery pack, all temperature sensors may cause external short circuit or internal short circuit due to water ingress or water vapor condensation, thereby causing temperature jump, and the temperature value jump amplitude is proportional to the degree of water ingress and condensation. Therefore, after analyzing a large amount of communication base station battery data, the temperature sensor temperature value jump is identified by the extreme temperature change of the internal temperature sensing temperature of the communication base station backup battery pack, thereby completing the extremely early warning identification of water ingress in the base station backup battery pack.

[0032] Optionally, when the BMS recognizes that the temperature extreme value change rate meets the corresponding judgment condition, it sends a water inlet fault flag message corresponding to the fault warning level to the FSU to complete the water inlet fault warning level push.

[0033] Optionally, the range of the effective temperature value of the temperature sensor is -20°C to 80°C, and the fault warning level of the backup battery pack of the communication base station is determined only when the temperature data of all temperature sensors are effective values.

[0034] Specifically, the specific judgment process of the extremely early warning method for water ingress to the backup battery pack of a communication base station is as follows: When the BMS and FSU controller complete low-voltage power-up, the FSU controller wakes up and completes the self-test: By default, there are 4-5 temperature sampling points T1, T2, ..., T5 in the backup battery pack of a communication base station. When the BMS detects that the temperature value in the battery pack meets all of the following conditions, the BMS sends a battery pack water ingress fault flag to the dynamic environment monitoring system, corresponding to the first fault warning level: Battery pack temperature extreme value difference 5℃< ≤10℃, the temperature values ​​of all NTC temperature sensors are effective values ​​between -20℃~80℃, and the temperature extreme value change rate ≥0.5℃ / s, and the duration is greater than or equal to 2s.

[0035] (2) When the BMS detects that the temperature value inside the battery pack meets all of the following conditions, the BMS sends a battery pack water ingress fault flag to the dynamic environment monitoring system, corresponding to the second fault warning level: Communication base station backup battery pack temperature extreme value difference >10℃, the temperature values ​​of all NTC temperature sensors are effective values ​​between -20℃~80℃, and the temperature extreme value change rate ≥0.5℃ / s, and the duration is greater than or equal to 2s.

[0036] This method does not require the addition of new sensors. It only uses the early evolution characteristics of the data of the existing NTC temperature sensor during the water ingress process to conduct mining and analysis, and completes the design of the relevant water ingress very early warning scheme. The warning identification scheme of the present invention selects the very early stage of water ingress inside the battery pack. The NTC temperature sensor inside the backup battery pack of the communication base station has an external short circuit or internal short circuit and fever caused by slight water ingress. At this time, the battery pack, BMS board and sampling harness inside the battery pack have not failed. At this stage, timely warning is pushed. After the after-sales or operation and maintenance personnel complete the on-site disposal (such as cleaning and drying the accumulated water), they only need to replace the NTC temperature sensor to complete the fault and water ingress risk elimination, avoiding the next step of related battery and high and low voltage harness corrosion and short circuit risks after water ingress, and minimizing the system loss after water ingress. It has great safety benefits as well as economic and social value, and has great potential for industrial promotion.

[0037] Example 2 Based on the same principle as the method shown in Example 1 of the present invention, an embodiment of the present invention further provides an extremely early warning system for water ingress in a backup battery pack of a communication base station, comprising: Several temperature sensors, BMS and FSU controllers installed in the base station backup battery pack; After the BMS and FSU controllers complete low-voltage power-up, the FSU controller starts running and uses various temperature sensors to collect temperature data and time data at each temperature sampling point; the temperature data includes the maximum and minimum temperature values; When moisture enters the base station backup battery pack, the temperature sensor short-circuits and the temperature jumps. The BMS calculates the temperature extreme value difference and the temperature extreme value change rate based on the collected temperature data. The BMS collects and extracts the duration of the temperature extreme value difference change range and the temperature extreme value difference change range, as well as the duration of the temperature extreme value change rate change range and the temperature extreme value change rate change range when the base station backup battery pack fails. The BMS sets the judgment conditions corresponding to each fault warning level based on the change range of the temperature extreme value difference, the duration corresponding to the change range of the temperature extreme value difference, the change range of the temperature extreme value change rate, and the duration corresponding to the change range of the temperature extreme value change rate. The BMS determines the fault warning level of the backup battery pack of the communication base station based on the temperature data collected by the temperature sensor, the judgment conditions corresponding to each fault warning level, and the range of the effective temperature value of the temperature sensor, and sends it to the FSU controller for warning.

[0038] Optionally, the temperature extreme value difference is the difference between the maximum value of the single cell temperature and the minimum value of the single cell temperature.

[0039] Optionally, calculate the temperature extreme value difference and temperature extreme value change rate based on the collected temperature data, including: assuming the temperature extreme value is The minimum temperature is , the temperature extreme difference is The temperature extreme value change rate is , is time, then the temperature extreme value difference is: ; The rate of change of temperature extremes is: .

[0040] Optionally, determination conditions corresponding to each fault warning level are set, including: if the temperature extreme value difference is greater than the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the duration of the temperature extreme value difference being greater than the first temperature value is greater than the set duration, then the fault warning level is the first fault warning level; if the temperature extreme value difference is greater than or equal to the second temperature value and less than or equal to the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the duration of the temperature extreme value difference being greater than the second temperature value and less than or equal to the first temperature value is greater than the set duration, then the fault warning level is the second fault warning level; the first temperature value is greater than the second temperature value.

[0041] Optionally, the first temperature value is 10°C; the second temperature value is 5°C; the set threshold of the temperature extreme value change rate is 0.5°C / s; and the set time is 2s.

[0042] Optionally, the temperature sensor is an NTC temperature sensor.

[0043] Optionally, when the BMS recognizes that the temperature extreme value change rate meets the corresponding judgment condition, it sends a water inlet fault flag message corresponding to the fault warning level to the FSU to complete the water inlet fault warning level push.

[0044] Optionally, the range of the effective temperature value of the temperature sensor is -20°C to 80°C, and the fault warning level of the backup battery pack of the communication base station is determined only when the temperature data of all temperature sensors are effective values.

[0045] Example 3 Based on the same working principle as the system shown in Example 2 of the present invention, the embodiment of the present invention further provides a battery pack, including an extremely early warning system for water ingress in a backup battery pack of a communication base station.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A very early warning method for water ingress in a backup battery pack of a communication base station, characterized in that: include: Several temperature sensors are installed in the base station backup battery pack. The BMS and FSU controller complete low-voltage power-up, and the FSU controller runs. The FSU controller uses each temperature sensor to collect temperature data and time data at each temperature sampling point; the temperature data includes the maximum and minimum temperature values. When moisture enters the base station backup battery pack, the temperature sensor short-circuits and the temperature jumps. The BMS calculates the temperature extreme value difference and the temperature extreme value change rate based on the collected temperature data. The BMS collects and extracts the duration of the temperature extreme value difference change range and the temperature extreme value difference change range, as well as the duration of the temperature extreme value change rate change range and the temperature extreme value change rate change range when the base station backup battery pack fails. The BMS sets the judgment conditions corresponding to each fault warning level based on the change range of the temperature extreme value difference, the duration corresponding to the change range of the temperature extreme value difference, the change range of the temperature extreme value change rate, and the duration corresponding to the change range of the temperature extreme value change rate. The BMS determines the fault warning level of the backup battery pack of the communication base station based on the temperature data collected by the temperature sensor, the judgment conditions corresponding to each fault warning level, and the range of the effective temperature value of the temperature sensor, and sends it to the FSU controller for warning.

2. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 1, characterized in that: The temperature extreme value difference is the difference between the maximum value of the single cell temperature and the minimum value of the single cell temperature.

3. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 1, characterized in that: Calculate the temperature extreme value difference and temperature extreme value change rate based on the collected temperature data, including: assuming the temperature extreme value is The minimum temperature is , the temperature extreme difference is The temperature extreme value change rate is , is time, then the temperature extreme value difference is: ； The rate of change of temperature extremes is: 。 4. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 1, characterized in that: The judgment conditions corresponding to each fault warning level are set, including: if the temperature extreme value difference is greater than the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the temperature extreme value difference is greater than the first temperature value for a duration greater than the set duration, then the fault warning level is the first fault warning level; if the temperature extreme value difference is greater than or equal to the second temperature value and less than or equal to the first temperature value, and the temperature extreme value change rate is greater than the set threshold, and the temperature extreme value difference is greater than the second temperature value and less than or equal to the first temperature value for a duration greater than the set duration, then the fault warning level is the second fault warning level; the first temperature value is greater than the second temperature value.

5. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 3, characterized in that: The first temperature value is 10°C; the second temperature value is 5°C; the set threshold of the temperature extreme value change rate is 0.5°C / s; and the set time is 2s.

6. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 1, characterized in that: The temperature sensor is an NTC temperature sensor.

7. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 1, characterized in that: When the BMS recognizes that the temperature extreme value change rate meets the corresponding judgment condition, it sends a water inlet fault flag message corresponding to the fault warning level to the FSU to complete the water inlet fault warning level push.

8. The method for early warning of water ingress to a backup battery pack of a communication base station according to claim 1, characterized in that: The effective value range of the temperature sensor is -20°C to 80°C, and the fault warning level of the communication base station backup battery pack is determined only when the temperature data of all temperature sensors are effective values.

9. The communication base station backup battery pack water ingress early warning system is characterized by: include: Several temperature sensors, BMS and FSU controllers installed in the base station backup battery pack; After the BMS and FSU controllers complete low-voltage power-up, the FSU controller starts running and uses various temperature sensors to collect temperature data and time data at each temperature sampling point; the temperature data includes the maximum and minimum temperature values; When moisture enters the base station backup battery pack, the temperature sensor short-circuits and the temperature jumps. The BMS calculates the temperature extreme value difference and the temperature extreme value change rate based on the collected temperature data. The BMS collects and extracts the duration of the temperature extreme value difference change range and the temperature extreme value difference change range, as well as the duration of the temperature extreme value change rate change range and the temperature extreme value change rate change range when the base station backup battery pack fails. The BMS sets the judgment conditions corresponding to each fault warning level based on the change range of the temperature extreme value difference, the duration corresponding to the change range of the temperature extreme value difference, the change range of the temperature extreme value change rate, and the duration corresponding to the change range of the temperature extreme value change rate. The BMS determines the fault warning level of the backup battery pack of the communication base station based on the temperature data collected by the temperature sensor, the judgment conditions corresponding to each fault warning level, and the range of the effective temperature value of the temperature sensor, and sends it to the FSU controller for warning.

10. A battery pack, characterized in that: It includes the extremely early warning system for water ingress in the backup battery pack of a communication base station as described in claim 9.

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