A fuel cell stack
A technology of fuel cell stacks and single cells, which is applied in the direction of fuel cells, circuits, electrical components, etc., and can solve problems such as dangerous, high-temperature melting seals, membrane electrodes, and battery short circuits, so as to improve safety and reliability and avoid Fuel cell internal resistance, effect of reducing battery power generation capacity
Active Publication Date: 2018-04-20
北京长征天民高科技有限公司
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Problems solved by technology
Therefore, if there is a slight deviation or misalignment when assembling the battery, two bipolar plates or multiple bipolar plates will short-circuit and burn the bipolar plates due to contact, or even melt the seals and membrane electrodes at high temperature, causing fire, explosion, etc. Phenomenon
In addition, during the use of the battery, the seal will become thinner and the secondary ring of the membrane electrode will be damaged, which will lead to a short circuit of the battery, which is extremely dangerous
Method used
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[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0019] The fuel cell stack provided by the embodiment of the present invention includes a plurality of stacked single cells. refer to figure 1 , which is a front view of a single cell of a fuel cell according to an embodiment of the present invention. The single cell 5 includes: a membrane electrode 4 , a cathode plate 301 , an anode plate 302 and an insulating sleeve 1 . The membrane electrode 4 is arranged between the cathode plate 301 and the anode plate 302. The cathode plate 301 and the anode plate 302 are composed of two flow field plates 3 of the same size, and are respectively arranged on the four sides of each flow field plate 3 Insulation sleeve1. Wherein, the cathode plate 301 and the anode plate 302 together...
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The invention discloses a fuel cell stack. The fuel cell stack is formed by stacking a plurality of single cells; a single cell comprises metal bipolar plates, a membrane electrode and a sealing element; the metal bipolar plates comprise a negative plate and a positive plate composed of two flow field plates with same size; insulation sleeves are arranged on four sides of each flow field plate respectively; and a clamping groove in clamping connection with the edge of each flow field plate is formed in the corresponding insulation sleeves. The membrane electrode is clamped between the negative plate and the positive plate, and is suppressed by the negative plate and the positive plate; sealing grooves are formed in the negative plate and the positive plate around the membrane electrode; and the sealing element for filling the periphery of the membrane electrode is filled in the sealing groove. The fuel cell stack provided by the invention can reduce the risk of short circuits, and the safety and reliability of the fuel cell stack are improved.
Description
technical field [0001] The invention relates to the field of fuel cells, in particular to a fuel cell stack. Background technique [0002] A fuel cell is a device that converts chemical energy stored in hydrogen fuel and oxidant (oxygen) directly into electricity. The basic principle is that hydrogen and oxygen (air) undergo oxidation and reduction reactions respectively to generate water and generate heat and electricity. It has outstanding advantages such as high energy conversion efficiency, low-temperature start-up, environmental friendliness, low noise, safety and reliability, high specific power and specific energy density. It has good application prospects in the fields of mobile power, fixed power stations and transportation. It is considered to be one of the most effective means to solve environmental pollution and energy crisis. It has attracted the attention of domestic and foreign governments, car companies and scientific and technological workers. [0003] A f...
Claims
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IPC IPC(8): H01M8/0276H01M8/2465H01M8/247
CPCH01M8/0276H01M8/2465H01M8/247Y02E60/50
Inventor 宋艳平张广孟杜宏斌翟俊香顾艳田中辉靳殷实张宝春
Owner 北京长征天民高科技有限公司