Battery degradation diagnostic system and method for diagnosing battery degradation using this battery degradation diagnostic system

Abstract

The objective is to provide a battery degradation diagnosis system that allows for easy updates of degradation diagnosis algorithms and other related components. [Solution] The battery degradation diagnosis system 10 is characterized by comprising: a measurement unit 12 that measures the voltage, current, and temperature of the battery 4 at the site where the battery 4 is used; a transmitting and receiving unit 14 that transmits the voltage, current, and temperature data measured by the measurement unit 12; and a degradation diagnosis server unit 16 that stores the voltage, current, and temperature data transmitted by the transmitting and receiving unit 14, obtains correction information and characteristic information necessary to diagnose the degradation of the battery 4 based on the voltage, current, and temperature data, and performs correction processing and calculation processing based on the DC resistance value to perform the diagnosis.

Claims

1. A measuring unit for measuring the voltage, current, and temperature of a storage battery at a site where the storage battery is used, A transmitting unit that transmits the voltage, current, and temperature data measured by the measuring unit, The voltage, current, and temperature data transmitted by the transmitting unit are stored, a battery characteristic data table pre-stored for each battery model is referenced, coefficients A and B are obtained from the battery characteristic data table based on the voltage and temperature, and a function F is used with coefficients A and B and the DC resistance value obtained based on the stored data as arguments. A degradation diagnosis server unit calculates the capacity retention rate of the storage battery using the formula: Capacity retention rate (SOH) = coefficient A × F (DC resistance value) + constant B, A battery degradation diagnostic system characterized by having the following features.

2. In the battery degradation diagnosis system according to claim 1, The battery degradation diagnosis system is characterized in that the degradation diagnosis server unit performs a degradation diagnosis of the battery based on the accumulated voltage, current, and temperature data.

3. In the battery degradation diagnosis system according to claim 2, The battery degradation diagnosis system is characterized in that the degradation diagnosis server unit predicts the degradation of the battery based on the accumulated degradation diagnosis results of the battery.

4. In the battery degradation diagnosis system according to claim 2, The battery degradation diagnosis system is characterized in that the degradation diagnosis server unit learns information regarding the degradation prediction of the battery and updates the degradation prediction algorithm.

5. In the battery degradation diagnosis system according to claim 2, The battery degradation diagnosis system is characterized in that the degradation diagnosis server unit learns information related to the degradation diagnosis of the battery and updates the degradation diagnosis algorithm.

6. In the battery degradation diagnosis system according to claim 1, The battery degradation diagnostic system is characterized in that the measurement unit performs measurements of the voltage and current of the battery at multiple points by waveform observation.

7. A measuring unit for measuring the voltage, current, and temperature of a storage battery at a site where the storage battery is used, A transmitting unit that transmits the voltage, current, and temperature data measured by the measuring unit, The voltage, current, and temperature data transmitted by the transmitting unit are stored, a battery characteristic data table pre-stored for each battery model is referenced, coefficients A and B are obtained from the battery characteristic data table based on the voltage and temperature, and a function F is used with coefficients A and B and the DC resistance value obtained based on the stored data as arguments. A degradation diagnosis server unit calculates the capacity retention rate of the storage battery using the formula: Capacity retention rate (SOH) = coefficient A × F (DC resistance value) + constant B, A method for diagnosing battery degradation using a battery degradation diagnostic system equipped with, A first step involves measuring the voltage, current, and temperature of the storage battery using the measuring unit, A second step involves using the transmitting unit to transmit the voltage, current, and temperature data acquired in the first step to the degradation diagnosis server unit, A third step involves performing a degradation diagnosis of the storage battery using the degradation diagnosis server unit, A method for diagnosing the deterioration of a storage battery, characterized by comprising the following features.

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