Method and device for measuring specific heat capacity of battery
A technology of specific heat capacity and battery, applied in the field of battery testing, can solve problems such as deviation of measurement results, and achieve the effect of accurate measurement
Pending Publication Date: 2021-06-25
苏州玛瑞柯测试科技有限公司
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Problems solved by technology
[0004] However, when measuring the specific heat capacity of a battery with an accelerating calorimeter (ARC), there will be deviations in the measurement results due to some measurement errors in the equipment itself and factors such as different battery sizes and weights.
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[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0040] In one embodiment of the present invention, a method for measuring the specific heat capacity of a battery is provided, which includes the following steps:
[0041] S1. Put the standard sample in the adiabatic chamber for heating, and at the same time ensure that the ambient temperature in the adiabatic chamber tracks the temperature of the standard sample in real time and keeps it consistent, and obtains the temperature change curve of the standard sample with time;
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The invention is suitable for the technical field of battery detection, and provides a method and device for measuring the specific heat capacity of a battery, and the method comprises the following steps: placing a standard sample in a heat insulation cavity for heating, meanwhile, ensuring that the environment temperature in the heat insulation cavity tracks the temperature of the standard sample in real time and keeps consistent, and obtaining a curve of the temperature of the standard sample changing along with time; calculating to obtain a specific heat capacity measurement value of the standard sample; obtaining a calibration coefficient of the specific heat capacity according to the specific heat capacity measurement value of the standard sample and the specific heat capacity theoretical value of the standard sample; according to the same method, obtaining a time-varying curve of the temperature of the to-be-measured battery; and calculating the specific heat capacity of the to-be-measured battery according to the time-varying curve of the temperature of the to-be-measured battery and the calibration coefficient of the specific heat capacity. According to the method, the calibration coefficient of the specific heat capacity can be obtained by firstly measuring the specific heat capacity of the standard sample of the known capacitor, so that the specific heat capacity of the battery can be measured more accurately according to the calibration coefficient.
Description
technical field [0001] The invention belongs to the technical field of battery detection, and in particular relates to a method and a device for measuring the specific heat capacity of a battery. Background technique [0002] Lithium-ion batteries generally use materials containing lithium elements as electrodes, which are representatives of modern high-performance batteries. Since lithium-ion batteries are prone to safety problems due to thermal runaway, battery thermal management is a vital means to ensure the safe use of lithium-ion batteries. [0003] Among them, battery thermal management not only needs to monitor the temperature of the battery, but also to control the speed of the battery temperature rise, and the specific heat capacity of the lithium-ion battery determines its own temperature rise and temperature rise under various charging and discharging conditions. Rate, is a relational thermal parameter for battery thermal management. [0004] However, when meas...
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IPC IPC(8): G01N25/20
CPCG01N25/20
Inventor 薛钢刘彬王潇俊刘占鸿代畅赵菊琴
Owner 苏州玛瑞柯测试科技有限公司