Constant temperature and isopiestic pressure type thermal battery electric performance test system and test method thereof

Abstract

The invention discloses a constant temperature and isopiestic pressure type thermal battery electric performance test system and a test method thereof. The test system comprises an electric performance test system and a test device arranged inside a glove box, wherein the test device comprises a constant temperature and isopiestic pressure system and a thermal battery assembly system which are matched with each other; the constant temperature and isopiestic pressure system comprises a first heating furnace plate and a second heating furnace plate between which a gap is formed; the first heating furnace plate is connected with a pressure machine, and the thermal battery assembly system is arranged between the first heating furnace plate and the second heating furnace plate; the thermal battery assembly system comprises a conducting clamp which is positioned between the first heating furnace plate and the second heating furnace plate and is electrically connected with the electric performance test system; and the conducting clamp is internally provided with a thermal battery. According to a single thermal battery discharge system and the test method disclosed by the invention, the disadvantages of an existing single thermal battery discharge test system are overcome, the thermal battery can be activated quickly, the system has relatively ideal single thermal battery discharge conditions, and the uniformity of single thermal battery discharge can be improved greatly.

Description

technical field [0001] The invention belongs to the technical field of thermal batteries, and in particular relates to a constant temperature and constant pressure type thermal battery electric performance testing system and a testing method thereof. Background technique [0002] Thermal battery is a kind of chemical power source. It is a primary battery activated by heating. Its electrolyte is molten salt, which is solid at room temperature and non-conductive. When in use, the molten salt is melted into an ion conductor by heating, and the battery is activated to start discharging. Since the electrolyte of the thermal battery is solid at normal temperature, there is almost no self-discharge phenomenon, and the thermal battery has a long storage time, which can reach 20 years. The molten electrolyte has high conductivity, so hot batteries can be discharged at high current densities. Thermal batteries are widely used in weaponry due to their high reliability, long storage li...

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Problems solved by technology

At present, there are two main ways to heat a single thermal battery. One is to pressurize and heat the upper and lower furnace plates. This method directly contacts the battery conductive fixture and applies pressure. It has the advantages of fast activation of the single thermal battery and high test efficiency. However, the pressure of the test equipment is uncontrollable. At the same time, some equipment is used directly in the air, and the influence of oxygen on the test results cannot be ruled out, and the test results will produce certain deviations; another method is the furnace body (tube furnace, high temperature furnace) Heating, first put the battery in the test mold, and then heat it in the furnace body. The advantage of this test method is that it can be protected by inert gas to avoid oxidation of the electrode material, but the pressure of this test method cannot be adjusted, and the activation time is longer , the replacement mold cycle is long, and the test efficiency is low. In addition, if the tube furnace is not placed in a dry room (controlled humidity) for this test method, the water vapor in the air will mix with the battery negative electrode material LiSi or LiSi during the assembly process. LiB reacts and affects test results

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