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Energy storage battery safety monitoring method

A safety monitoring and energy storage battery technology, applied in secondary battery testing, secondary battery, secondary battery repair/maintenance, etc., can solve the problems of rare research, gas production, slowness, etc. The effect of strong electromagnetic interference and low cost

Pending Publication Date: 2022-01-14
SHANGHAI YUYUAN POWER TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

And fundamentally speaking, battery expansion is also an unavoidable problem. During the long-term use of the battery, the electrolyte in the battery is slowly consumed, and the internal side reactions will slowly produce gas, so it will expand. Even if you continue to use it, The charging and discharging efficiency and life of the battery are also greatly reduced, so it is necessary to monitor the safety of the battery during use
The current battery management system mainly monitors the temperature, voltage, and current of the battery pack in real time, and lacks the monitoring of the expansion of the battery cell, because the expansion of the battery cell is not obvious during use, and it is a slow process.
In addition, due to the limitation of installation space and use cost, there are few researches in this area.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] see Figure 1~4 , an energy storage battery safety monitoring method, the monitoring structure includes

[0033] Cell module 1, which is assembled by applying an appropriate amount of heat-conducting silica gel between several cells;

[0034] The end plate clamping assembly is arranged at both ends of the cell module 1, and it includes a fixed end plate 2 fixedly placed on one side of the cell module 1 and a fixed end plate 2 close to the cell module 1 constituted by a sliding end plate 3 on the other side and the bottom is not fixed;

[0035] The expansion pressure measuring mechanism is arranged on one side of the sliding end plate 3, and it is composed of a U-shaped plate arranged parallel to the sliding end plate 3 and having a fixed bottom end, and a middle sliding plate 12 that is movably arranged on the inner side of the U-shaped plate , and the U-shaped plate is composed of a spring support plate 11 on the front side and a fixed back plate 14 on the rear side,...

Embodiment 2

[0042] see Figure 1~4 , an energy storage battery safety monitoring method, taking a cell module composed of multiple cells as an example, the monitoring method includes

[0043] First, fix the fixed end plate of the sheet metal material to one end of the battery pack by welding or bolting, apply an appropriate amount of heat-conducting silica gel between the cells to form a group, and place the cell module against the fixed end plate. Then place the sliding end plate on the right side of the cell module. When the cell module expands, the sliding end plate will move to the right, the spring will be compressed, and the compression force will be transmitted to the pressure sensor, so as to obtain the rebound force generated by the expansion of the cell module, and the pressure sensor can detect the pressure value And store, so as to obtain the expansion rebound force of the battery module in different stages of charging and discharging.

[0044] The telescopic spring can be a...

Embodiment 3

[0052] see Figure 1~4 , an energy storage battery safety monitoring method, taking a single cell as an example, the monitoring method includes

[0053] First, fix the fixed end plate of the sheet metal material to one end of the battery pack by welding or bolting, then place a single cell, and place the cell against the fixed end plate. Then place the sliding end plate on the right side of the cell. When the cell expands, the sliding end plate will move to the right, the spring will be compressed, and the compression force will be transmitted to the pressure sensor, so as to obtain the rebound force caused by the expansion of the cell. The pressure sensor can detect and store the pressure value, so that Obtain the expansion rebound force of the battery cell at different stages of charge and discharge.

[0054] The telescopic spring can be a spiral mold spring with a load of 137N, a spring constant of 3.1N / mm, an inner and outer diameter of the spring of 12-15mm, a free leng...

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Abstract

The invention discloses an energy storage battery safety monitoring method, which employs a battery cell module, an end plate clamping assembly, an expansion pressure measuring mechanism and an expansion distance measuring mechanism. The energy storage battery safety monitoring method has the beneficial effects that: an expansion bounce value generated when the battery cell module expands can be monitored, and whether grouping modes fail or not can be evaluated through utilizing the bounce and the tensile strength of the material; and the expansion displacement of the battery cell module in the charging and discharging process can be monitored, so that the expansion degree of the battery cell module is evaluated, the expansion condition of the battery cell module is comprehensively monitored by combining expansion force measurement and distance measurement of the battery cell module, and the method plays an important role in monitoring battery cell expansion, predicting battery cell fire and analyzing fire reasons.

Description

technical field [0001] The invention relates to a battery monitoring method, in particular to an energy storage battery safety monitoring method, and belongs to the technical field of new energy batteries. Background technique [0002] At present, fires occur frequently in the energy storage industry. A large number of lithium batteries are stored in energy storage power stations. Once the fire is out of control, the fire cannot be controlled at all. One of the important reasons for the fire of lithium batteries is due to the expansion of the battery. When the battery is charging and discharging, the internal temperature of the battery continues to rise, the gas generated during the activation process expands, the internal pressure of the battery increases, and the pressure reaches a certain level. Scars, that is, rupture, causing swelling, leakage, fire, and even explosion. And fundamentally speaking, battery expansion is also an unavoidable problem. During the long-term u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/42H01M10/48G01L5/00
CPCH01M10/4207H01M10/482H01M10/4285G01L5/00Y02E60/10
Inventor 尚德华刘越
Owner SHANGHAI YUYUAN POWER TECH CO LTD