TWI220803B - The adjustable end plate structures for the fuel cells - Google Patents

Abstract

The present invention provides the adjustable end plate structures for the fuel cells, which are applied in a fuel cell system to lock a fuel cell pile between two end plates via a tying lock device. An adjustable device structure is arranged on the two end plates for adjusting and controlling the bent deformation of the two end plates. A connection device is connected to the adjustable device structure. Therefore, an adjustable end plate device structure of cell battery is constructed to enable the end plate to bear suitable force or torque, thereby maintaining the flatness of the end plate to enhance the airtight capability of the fuel cell system.

Description

! 22〇8〇3 V. Description of the Invention (l) [Technical Field] The present invention relates to an adjustable end plate assembly structure of a fuel cell, which is used to maintain the flatness of the end plate and the airtightness of the fuel cell system. [Prior technology] A fuel cell is a power generation device that directly converts chemical energy stored in fuel into electrical energy through electrochemical oxidation and reduction reactions. It has the advantage of high power generation efficiency; if a fuel cell uses hydrogen as a fuel, the reaction After the water is generated, there is no problem of pollutant discharge. In addition, it has the advantages of low noise, simple installation, and easy modular operation. Therefore, it has become the fourth generation power generation device after hydraulic, thermal and nuclear power. Please refer to "Figure 1", taking a proton exchange membrane fuel cell (pEMFC) as an example, which includes a plurality of battery cells, each of which is mainly composed of a proton exchange membrane (PEM) located on the two sides of the center A catalyst layer 2 is provided for each, and a diffusion layer 3 is provided for each of the catalyst layers. Finally, two bi-polar plates (Bi-Polar piate) 4, current collector 5 and end PI ate are sandwiched. ) Is composed of 6 cells, and then the above components are closely combined together with a predetermined contact pressure to form a battery cell. Because fuel cells are used in practice, in order to obtain sufficient power, a plurality of the above battery cells are usually combined. The body stack is connected in series to form a battery stack 10, and the two end plates i 2, 1 3 'provided at the longitudinally opposite ends of the battery stack 10 and a plurality of peripheral plates passing through the two end plates 1 2, 1 3 The tie rods 14 lock the battery stack 10 between the two end plates 12 and 13 (see "Figure 2"). Please refer to "Figure 3", which is a conventional fuel cell, which includes a battery stack 10, two end plates 1, 2, 13 and a plurality of tie rods 14. The conventional fuel cell further includes a plurality of elasticity. Element 50, which is fixed to the lower end plate

Page 6 V. Description of Invention (2) _

The locking degree of the A-tie rod 14 between 1 3 and the ends of each tie rod 14 is such that while the tie rods 14 are fixed, the dust force of each lower end plate 13 can be adjusted to make 7 ^ pieces as possible. The elastic recovery force of 50 is applied to the electric contact pressure. The best pressure to guide this kind of battery is required for each layer of battery. Keep the manual pressure to adjust the position. The lower end is mainly for the operating pressure near the 50 where the elastic element 50 is located. The pressure can be 1 3 Therefore, it can only ensure that the operating pressure of the remote location is controlled elastically, within the required range, and the overall flatness of the battery cell cannot be effectively pressed, and in order to ensure the degree of locking when locking each tie rod 14 Therefore, it is necessary to accurately measure the other known fuel cell of each tie rod, 48 5 6 60, which reveals a recording showing the female slamming 4 Republic of China Patent Bulletin No. "), the uniform pressure Fuel cells with per capita pressure (see "4-Central area in the peripheral area ... end plate 1 () 0, ⑴, each end plate contains 1 ...., central area of 110 :: natural battery · 14 ° Set on the two end plates 1 1 η to free f, product 3 binding device 1 2 0 set on both end plates 1 0 0, σ, one product ^ to lock the fuel cell stack 1 4 0 on two End plate 1 0 0, 1 1 0 4 ^ The pressure device includes a pressure bellows, which is installed in the fuel cell 0, mountain 0, 1 10, the main feature of which is the grooves 1 0 1 and 1 1 2 formed in the upper and lower end plates η 0 of the fuel cell stack 140, and there are several uniform pressure devices in the grooves 10 1 and 1 1 2 102, U3, and the pressure device often sadly applies a pressure within a certain range to the stack 140. ^ For the fuel cell known in the province, see US Patent No. 6, 4 2 8, 9 2 1 B1, A method and device for compressing a fuel cell stack in Zhongjie Road (see "figure 5"), which include: a plurality of fuel cell stacks 15 and an upper end plate accessory package

Page 7 V. Description of the invention (3) --- Contains an upper plate 1 7 a plurality of screws ~ collector plate or distribution plate 1 7 2, lower end plate accessories 1 6 0 and 1 9 丨, 1 8 0 'and Each bolt fitting includes a bolt 194 and a nut specifically stripped. A bolt 1 9 4 includes a head end 192 and a threaded rod portion 193; the pile is 150, and a dry / self-made pair The upper plate 171 exerts a compressive force to lock the fuel cell 171? , I are adjusted by a plurality of screws 1 8 0 distributed on the upper plate 1 7 1 to adjust the upper plate for A moment and compressive force, so as to avoid the upper plate 1 7 1 to pass through the field due to the tension. The large moment and the plant; the plurality of screws 180 in the central area of the upper plate 171 will withstand a maximum of 1 80, the need for-posture shrinkage force 'and this fuel cell device has a plurality of screws by \ adjust its locking degree' also makes The operation process is complicated. On the side, a screw battery is used to estimate the battery system, and the end plate is placed at two moments of the stacked battery pack to be flexed: it is used for support and fixation, resulting in the end plate being subject to the screw preload and the problem. Therefore, It will make the fuel cell system leak the reactive gas [content ~ Tianyuan integrity airtightness, causing safety problems in use. The purpose of the present invention is to improve the integrity and safety of the adjustable end plate battery of the end plate. The purpose is to strengthen the airtightness of the fuel cell system and the flexibility of the flat end plate. With the proper combination of the fuel cell device structure of the present invention, a suitable fuel can be constructed, which will greatly improve the power generation efficiency and the fuel cell system. The adjustable end plate assembly structure of the gas-tight fuel cell includes: two end plates having a plurality of tie holes for a tie-locking device to be arranged thereon to lock the fuel cell stack in two Between end plates; an adjustable component structure used to adjust and control the flexure and deformation of one end plate and adjust the force distribution and range of the two end plates. It has a plurality of blocks, and there is a single block on the block. Or plural

Page 8 1220803 V. Description of the invention (4) hole; and a plurality of screws are placed in the locking holes of the aforementioned block; a connecting device is used to combine the above-mentioned adjustable component structure, and the fuel cell The adjustable end plate assembly structure can make the end plate bear proper force or moment, and effectively maintain the flatness of the end plate and the air tightness of the fuel cell system. [Implementation method] The detailed description and technical content of the present invention are described below with reference to the drawings: Please refer to "Figures 6, 7, and 8", which is an adjustable end plate assembly structure and a schematic sectional view of the present invention. Including one end plate 2000, a plurality of screws 2 2 1, a plurality of nuts 2 2 2 and a plurality of blocks 2 3 0 for supporting the screws 2 2 1 are placed on the surface of the end plate 2000, The block body 2 3 0 has a locking hole 2 3 1 corresponding to the screw 2 2 1 and the nut 2 2 2, which is used to provide a lock for the nut 2 2 2 and the screw 2 2 丨 and an end plate. There are a plurality of connecting rods 2 5 0 and a plurality of cross-shaped connecting devices 2 4 0 on the surface of 2 0 0. The connecting devices 2 4 0 are used to connect a plurality of screws 2 2 丨 and a plurality of connecting rods 2 5 0. A plurality of tie holes 26, which are located on the surface of the end plate 200, are used to lock the end plate 200 of the fuel cell system. ^ The screw 221 is inserted into the locking hole 231 on the block 230, and is inserted into the second screw, —J ', then the connection device 240 is connected to the screw, 21 and the connecting rod 25 0 rft $ ^ I pair each nut 2 2 2 When the locking force is applied, the end plate 200 can be urged when the force is applied, and the shape can be shaped: #The force is applied to each nut m by a different combination of the locking force 2000. ^ The control end is distributed The behavior of the plate 200 is deformed, and the end plate 2 50 can be adjusted above and outside. 连 ^^ 置 240 may have an internal screw 241 to correspond to the connecting rods ',', and the connecting rods 2 5 0 Screw in the connection device 2 4 0 to make the connection

1220803 V. Description of the invention (5) The buckle and the connecting device 240 are tied and connected with each other (see "Figure 16"). As described in "Figure 6", the first embodiment of 可 敕 敕 Ί and Ί Γ is based on the use of the upper ^? Η π ν 丌 正式 formally assembled board assembly structure, including two identical structures of Gujing installed in fuel power and Detachment, a total of a plurality of screws 2 2 and a plurality of nuts 2 2 2 2 3 corresponding to the screws 2 2 1,, ',, 2 2 1 block 2 3 0, and the block 2 3 Q has a locking hole on the _ i / V, so the nut 2 2 2 and the screw 2 2 1 are used for locking, and the other two end plates are 200, two or more connecting devices 240, and a plurality of connecting rods. 250, can connect plural ^ stem 221 to form an adjustable component structure, which can be used to adjust and control the behavior of two I ^ 200 deflections, and the force distribution of the end plate 2000 can be adjusted; The coupling device includes a plurality of tie rod nuts 62 corresponding to the tie holes 26 and is used to lock a plurality of tie rods 26 tied to the two end plates 200 to form a horse-locked fuel pool stack 2 For the purpose of 70. Please refer to "Fig. 10", which is a schematic diagram of an adjustable end plate assembly of the present invention, and the connection device 34o is designed in a square shape. Including one end ^ 3 0 0 'on the surface of the end plate 3 00 a plurality of screws 3 2 2 a plurality of nuts 2' and a plurality of blocks 3 3 3 to support the screw 32, the block The body 3 3 〇 has a locking hole 3 3 1 corresponding to the screw 3 2 1 and the nut 3 2 2 to provide a lock for the nut 3 2 2 and the screw 321, and the surface of the end plate 300 A connection f 3 3 0 is provided for connection with a plurality of screws 3 2 1, and a plurality of tie holes 3 6 0 on the end plate 3 00 are used to lock the end plate of the fuel cell system 〇〇 用。 3 00. Please refer to "Figure 11", which is the second embodiment of the present invention, which uses the adjustable end plate assembly structure of Figure 10 above, so that the combination can be turned.

Page 10 1220803 V. Description of the invention (6) ~~~-一 ~ ^-The whole module structure is a square shape. Please refer to "Figures 12 and 13", which is another schematic diagram of the adjustable structure and the embodiment of the present invention. The connecting device 44 is designed as a human-made type. The above-mentioned components and connecting devices are the same as those in the previous embodiment The 440 lock 5 'makes the adjustable assembly structure in a cross shape. Please refer to "Figures 14 and 5", which is another aspect of the present invention-the structure of the adjustable end plate, the structure is not intended and a schematic diagram of its embodiment. The connecting device 5 4 0 is designed as an X shape, the same In the foregoing embodiment, the above-mentioned components are locked with the connecting device 540 so that the combined adjustable component structure is X-shaped. Benmemin can also be located between the end plates 200, 300, 400, 50 0 and the fuel cell stack 2 70, 3 70, 47 0, 5 70, with an elastic buffer layer structure, which is used to absorb the locking action For the end plates 2000, 300, 400, 5000 and the fuel cell stacks 270, 370, 470, 570, the concentration stress caused by the transfer to the fuel is reduced. The force components of the battery stack 2 70, 3 70, 4 70, and 57 0 prevent the carbon plate from being damaged due to excessive bonding force. In summary, the above are merely preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. That is, all equivalent changes and modifications made according to the content of the scope of patent application of the present invention shall be the technical scope of the present invention.

1220803 Schematic description [Schematic description] Figure 1, a schematic diagram of the basic composition and structure of a proton exchange membrane fuel cell. FIG. 2 is a schematic structural diagram of a conventional fuel cell. FIG. 3 is a schematic structural diagram of another conventional fuel cell. FIG. 4 is a schematic structural diagram of another conventional fuel cell. FIG. 5 is a schematic structural diagram of another conventional fuel cell. FIG. 6 is a schematic structural diagram of an adjustable end plate assembly according to the present invention. Fig. 7 is a sectional view taken along the line A-A in Fig. 6. Fig. 8 is a sectional view taken along the line B-B in Fig. 6; FIG. 9 is a schematic diagram of a first embodiment of the present invention. FIG. 10 is a schematic structural diagram of another adjustable end plate assembly according to the present invention. FIG. 11 is a schematic diagram of a second embodiment of the present invention. Fig. 12 is a schematic structural diagram of another adjustable end plate assembly according to the present invention. FIG. 13 is a schematic diagram of a third embodiment of the present invention. FIG. 14 is a schematic structural diagram of another adjustable end plate assembly according to the present invention. Fig. 15 is a schematic diagram of a fourth embodiment of the present invention. Figure 16 is an exploded view of the connection device. [Illustration of Symbols] 1 ...... proton exchange membrane 2 ...... catalyst layer 3 ...... diffusion layer 4 ...... bipolar plate 5 .... ..Collector board 10 ... battery stack

Page 121220803 Brief description of the drawings 14 ..... • Tie bar 5 0 ..... • Elastic element 1 0 Bu 112 ... Groove 102 '113 ... Uniform Pressure device 120 ... Binding device 160 " ... Lower end plate fitting 171 ......... Upper plate 172 ... The current collector or distribution plate 192 " ... head end 193 " ... Threaded rod part 194 ...… bolt 180 ^ 22b 32b 42b 521 ... screw 2 3 0 ^ 330, 430, 5 3 0 ... block 23b 33b 43b 5 31 .. .... Locking hole 2 40 ~ 340, 440, 5 4 0 ...... Connecting device: 2 41 " · ... Internal thread 2 5 0 " ·… Connecting rod 251 ···… External thread 2 6 0 ^ 360, 460, 5 6 0 ... Tie holes 6, 12, 13, 100, 110, 200, 300, 400, 500 ... End plate 191 > 222, 322, 422, 522 ... Nuts 26, 36, 46, 561 ... Tie rods 2 6 2, 3 6 2, 4 6 2, 5 6 2 ... Tie rod nuts 1 4 0, 1 5 0, 2 7 0, 3 7 0 , 4 7 0, 5 7 0 ... fuel cell stack

Page 13

Claims (1)

1220803 6. Scope of patent application 1. An adjustable end plate assembly structure for a fuel cell, comprising: two end plates having a plurality of tie holes therein; a fuel cell stack disposed between the two end plates; a tie lock Device including a plurality of tie rods and a plurality of tie rod nuts for locking the fuel cell stack between the two end plates; an adjustable component structure including a plurality of blocks and a plurality of screws And a plurality of nuts, wherein the block body is provided with a locking hole provided on the two end plates to support the screw and used for locking the screw and the nut, the adjustable component The structure is used to adjust and control the flexure and deformation of the end plate, and adjust the force distribution and range of the end plate; the connecting device includes a single or a plurality of connecting rods for connecting the adjustable ends of the two end plates Component structure. 2. The adjustable end plate assembly structure for a fuel cell as described in item 1 of the scope of the patent application, wherein the two end plates may be provided with a single or multiple elastic buffer layer structures on the edge or central portion of the end plate, and the fuel cell Heap touch. 3. The adjustable end plate assembly structure for a fuel cell as described in item 1 of the scope of patent application, wherein the tie rod of the tie locking device passes through the tie hole of the two end plates and uses the tie screw Cap locked. 4. The adjustable end plate assembly structure of the fuel cell according to item 1 of the patent application, wherein the screw of the adjustable assembly structure is inserted into the locking hole of the block body, and the nut The screw is locked with the block. 5. The adjustable end plate assembly structure for a fuel cell as described in item 1 of the scope of the patent application, wherein the connection device has internal threads, and the adjustable assembly structures are tied and connected to each other. Page 14 1220803 Page 15