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Online detection method and device for health status of storage battery

A technology of health status and detection method, which is applied in the direction of measuring devices, measuring electricity, and measuring electric variables, etc., can solve the problems of battery internal resistance reduction and inability to fully reflect the battery health status, and achieve the effect of accurate detection

Active Publication Date: 2013-03-06
埃斯倍风电科技(青岛)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] With the continuous charging and discharging of the battery, its capacity in the saturated state will continue to decrease, while the internal resistance will continue to increase. When the internal resistance increases to a certain level, the corresponding saturated capacity can no longer meet the requirements of the load circuit. Power supply requirements, that is, the health status of the battery is aging and needs to be replaced. It can be seen that the internal resistance of the battery can indirectly reflect the health status of the battery, but if the battery is damaged by battery puncture, it will cause the internal resistance of the battery to decrease. The size of the resistance does not fully reflect the health status of the battery

Method used

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  • Online detection method and device for health status of storage battery
  • Online detection method and device for health status of storage battery

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Embodiment 1

[0028] Example 1, such as figure 1 As shown, the present embodiment discloses a method for online detection of battery health status, the method includes the following steps:

[0029] The charging circuit that charges the battery needs to be disconnected before starting the test.

[0030] (1) Perform DC discharge on the battery, discharge for 3 seconds to remove the virtual voltage of the battery, and then check the voltage of the battery. If it is lower than 95% of the rated value, the battery is damaged;

[0031] (2) Use the AC constant current generating device to send an AC signal of a fixed frequency to the battery, and measure the internal resistance of the battery according to the principle of the AC method, specifically: collect the AC voltage signal of the generating device and the AC voltage signal of the battery, and compare the two Carry out the multiplication operation, input the result signal of the operation into the low-pass filter to filter out the AC voltage...

Embodiment 2

[0034] Embodiment 2, this embodiment discloses an online detection method of battery health status, the method includes the following steps:

[0035] The charging circuit that charges the battery needs to be disconnected before starting the test.

[0036] (1) Perform DC discharge on the battery, discharge for 60 seconds to remove the virtual voltage of the battery, and then check the voltage of the battery. If it is lower than 85% of the rated value, the battery is damaged;

[0037] (2) Use an AC constant current generating device to send an AC signal of a fixed frequency to the battery, obtain the internal resistance of the battery according to the principle of measuring the internal resistance of the battery by the AC method, and then correct the internal resistance value according to the ambient temperature, using IEEE 1188- According to the standards disclosed in Annex C of 1996, if the corrected internal resistance value exceeds 20% of the rated value, the battery is agin...

Embodiment 3

[0040] Embodiment 3, this embodiment discloses an online detection method for battery health status, the method includes the following steps:

[0041] The charging circuit that charges the battery needs to be disconnected before starting the test.

[0042] (1) Perform DC discharge on the battery, discharge for 10 seconds to remove the virtual voltage of the battery, and then check the voltage of the battery. If it is lower than 90% of the rated value, the battery is damaged;

[0043] (2) Use an AC constant current generating device to send an AC signal of a fixed frequency to the battery, obtain the internal resistance of the battery according to the principle of measuring the internal resistance of the battery by the AC method, and then correct the internal resistance value according to the ambient temperature. If the corrected internal resistance If the resistance value exceeds 30% of the rated value, the battery is aging; in addition, according to the corresponding curve of...

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Abstract

The invention discloses an online detection method for the health status of a storage battery. The method comprises the following steps of: (1) performing direct-current discharge on the storage battery for a certain period of time to remove empty voltage of the storage battery, and detecting the voltage of the storage battery; (2) transmitting an alternating-current signal of a fixed frequency to the storage battery by using an alternating-current constant-current generating device, and obtaining the internal resistance of the storage battery according to a principle for measuring the internal resistance of a battery with an alternating-current method; and (3) in a primary detection process, performing the steps (1) and (2) simultaneously or in any sequence. According to the online detection method disclosed by the invention, the detection of the presence of damage such as battery puncture through direct-current discharge on the storage battery is combined with detection of the internal resistance of the storage battery with the alternating-current method, so that the health status of the storage battery is reflected accurately under the condition of keeping the storage battery on line.

Description

technical field [0001] The invention relates to the field of battery detection, in particular to an on-line detection method and device for the state of battery health in the field. Background technique [0002] Redundant power supply design is a common power supply design method, which means that the system connects the battery and the power line in parallel to the load circuit. When the power line is normal, the power line supplies power to the load circuit and keeps charging the battery. Keep it in a state of capacity saturation; when the power line is interrupted, switch to the battery for power supply, so that the battery can only be used as a backup power supply when the power line is interrupted. In order to ensure that the battery can work normally, it is necessary to check its health state, to avoid the situation that the battery cannot work normally after the power line is interrupted. [0003] With the continuous charging and discharging of the battery, its capac...

Claims

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Application Information

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IPC IPC(8): G01R31/36
Inventor 江显平王谦巩长义曲吉桢孙鹏飞席文静
Owner 埃斯倍风电科技(青岛)有限公司