Gas sampling method and device

A technology of gas sampling and gas sampler, which is applied in the direction of sampling device and test sample preparation, etc. It can solve the problems of high loss of sampling needle, difficulty in obtaining gas samples, and difficulty in sampling itself, so as to reduce equipment loss and provide accuracy , to avoid the effect of interference

Active Publication Date: 2010-09-29
SHENZHEN HIGHPOWER TECH CO LTD
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Problems solved by technology

The current sampling method and device, sampling itself is relatively difficult, the l...

Method used

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  • Gas sampling method and device
  • Gas sampling method and device
  • Gas sampling method and device

Examples

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Embodiment Construction

[0034] like figure 1 The gas sampler includes a sampling needle 1 and a gas collection cylinder 2, the gas collection cylinder 2 includes a sampling port (not shown in the figure) arranged at the end of the gas collection cylinder body, and one end is inserted into a suction / The exhaust push rod 3 and the secondary sampling port 4 provided on the wall of the gas collector, the secondary sampling port 4 is sealed by a sealing device (the present embodiment adopts a rubber gasket, and of course other materials with good elasticity can also be used. similar material), the sampling needle 1 is installed on the sampling port, and the hardness of the sampling needle 1 is greater than that of the explosion-proof ball in the corresponding battery. Because the positive hole of the Ni-MH battery is small, it is difficult to align, easy to stick off, and the explosion-proof ball is relatively hard, use a small, not hard sample needle to directly insert into the positive hole to sample a...

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Abstract

The invention relates to a method for sampling gas in a battery, which comprises the following steps of: A, sampling the gas in the battery for the first time into a gas sampler; B, pre-mixing the gas sampled for the first time; and C, sampling the pre-mixed gas for the second time to a detection device. The invention also relates to a gas sampler, which comprises a sampling needle and a gas collecting cylinder, wherein the gas collecting cylinder comprises a sampling port on one end part of the body of the gas collecting cylinder, a gas suction/exhaust push rod of which one end is inserted into the body of the gas collecting cylinder, and a secondary sampling port on the wall of the gas collecting cylinder; the secondary sampling port is sealed by a sealing device; and the sampling needle is arranged at the sampling port. The gas sampling method and the gas sampler can overcome the defects of difficult sampling, high equipment loss, and difficult acquisition of uniform gas samples in the prior art.

Description

technical field [0001] The invention relates to a gas sampling method and device, in particular to a sampling method and device for gas inside a nickel-hydrogen battery. Background technique [0002] Ni-MH batteries are widely used in various portable household appliances, digital cameras, mobile communications and other fields, as an important clean energy in chemical power sources. However, the internal pressure of the gas generated inside the Ni-MH battery affects the use and storage of the battery. The negative electrode of the MH / Ni battery is composed of a hydrogen storage alloy that can reversibly absorb and release hydrogen, and the positive electrode is a Ni(OH)2 electrode. The following reactions will occur during battery charging: [0003] Positive electrode: Ni(OH)2+OH-→NiOOH+H2O+e- a [0004] 4OH-→O2+2H2O+4e- b [0005] Negative electrode: M+H2O+e-→MHads+OH- c [0006] MHads→MHabs d [0007] MHads+H2O→H2+OH-e [0008] Reaction a is the reaction that occurs...

Claims

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Application Information

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IPC IPC(8): G01N1/22G01N1/38
Inventor 魏小华段芳孔令坤李文良
Owner SHENZHEN HIGHPOWER TECH CO LTD
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