Contactor for CVM and bipolar plate of hydrogen fuel cell stack
阅读说明：本技术 一种用于氢燃料电池电堆的cvm与双极板的接触器 (Contactor for CVM and bipolar plate of hydrogen fuel cell stack ) 是由 王天喜 贺萍 于 2019-10-14 设计创作，主要内容包括：本发明涉及一种用于氢燃料电池电堆的CVM与双极板的接触器,包括PCB板、位于左右两侧的电堆压板、位于电堆压板之间的双极板层,双极板层由多个双极板堆叠而成,PCB板固定在电堆压板上,PCB板与双极板之间设置有金属弹片,金属弹片一端焊接在PCB板底端,金属弹片另一端与双极板接触连接,PCB板上焊接有接插件,接插件与外部导线插拔连接,PCB板上印制有导线,金属弹片与接插件通过印制在PCB板上的导线连接；本发明使得工序大大简化,成本降低,且可靠性大幅提高,利于批量化生产,且PCB上的元件全部采用贴片结构,可用机器自动化焊接,从而生产效率高,避免了由人工操作造成的一致性差,可靠性低等缺点。(The invention relates to a contactor of a CVM (continuously variable capacitor) and a bipolar plate for a hydrogen fuel cell stack, which comprises a PCB (printed Circuit Board), stack pressing plates positioned on the left side and the right side and a bipolar plate layer positioned between the stack pressing plates, wherein the bipolar plate layer is formed by stacking a plurality of bipolar plates; the invention greatly simplifies the working procedure, reduces the cost, greatly improves the reliability, is beneficial to batch production, and elements on the PCB are all in a patch structure and can be automatically welded by a machine, thereby having high production efficiency and avoiding the defects of poor consistency, low reliability and the like caused by manual operation.)
1. A contactor for a CVM and bipolar plate of a hydrogen fuel cell stack, characterized by: including PCB board (1), be located the pile clamp plate (2) of the left and right sides, be located the bipolar plate layer between pile clamp plate (2), bipolar plate layer is piled up by a plurality of bipolar plate (3) and forms, PCB board (1) is fixed on pile clamp plate (2), be provided with metal shrapnel (4) between PCB board (1) and bipolar plate (3), metal shrapnel (4) one end welding is in PCB board (1) bottom, the metal shrapnel (4) other end is connected with bipolar plate (3) contact, the welding has connector (5) on PCB board (1), connector (5) are connected with the external conductor plug, the printing has the wire on PCB board (1), metal shrapnel (4) are connected through the wire of printing on PCB board (1) with connector (5).
2. The CVM and bipolar plate contactor for a hydrogen fuel cell stack of claim 1, wherein: PCB board (1) tilting is installed on pile clamp plate (2), is located and is provided with fixed orifices (6) on pile clamp plate (2) of one side, is located and is provided with bar groove (7) that extend along the fore-and-aft direction on pile clamp plate (2) of opposite side, PCB board (1) one end is fixed in fixed orifices (6) department, the PCB board (1) other end is fixed in bar groove (7) department to adjust the contained angle between PCB board (1) and pile clamp plate (2) through the position that PCB board (1) other end was fixed on bar groove (7), so that the length adaptation of PCB board (1) is the length between two pile clamp plate (2).
3. The CVM and bipolar plate contactor for a hydrogen fuel cell stack of claim 1, wherein: PCB board (1) tilting is installed on pile clamp plate (2), all is provided with a plurality of screw holes (8) on pile clamp plate (2) that are located the left and right sides, a plurality of screw holes (8) are along fore-and-aft direction evenly distributed on pile clamp plate (2), both ends are respectively through screw fixation in screw hole (8) department of pile clamp plate (2) about PCB board (1) to fix the position at screw hole (8) through adjustment PCB board (1) both ends and adjust the contained angle between PCB board (1) and pile clamp plate (2), so that the length of PCB board (1) adapts to the length between two pile clamp plates (2).
4. The contactor of CVM and bipolar plate for hydrogen fuel cell stack according to claim 2 or 3, wherein: the number of the metal elastic sheets (4) is the same as that of the bipolar plates (3), and the metal elastic sheets are arranged in a one-to-one correspondence manner.
5. The CVM and bipolar plate contactor for a hydrogen fuel cell stack of claim 4 wherein: the upper end of the metal elastic sheet (4) is welded at the bottom end of the PCB (1) through a machine paster, and the other end of the metal elastic sheet (4) is in contact connection with the bipolar plate (3) through elasticity.
[ technical field ]
The invention relates to the technical field of fuel cells, in particular to a contactor for a CVM and a bipolar plate of a hydrogen fuel cell stack.
[ background art ]
In a hydrogen fuel cell stack (abbreviated as stack), a Cell Voltage Monitor (CVM) is used for measuring the voltage of a single cell of the stack, and when the cell voltage is abnormal, protective measures or alarms need to be taken as soon as possible to prevent irreparable consequences to the stack. The structure is that each bipolar plate is led out by a lead wire, then is connected to a signal conditioning circuit, is connected to an ADC after being processed, converts analog quantity into digital signals and transmits the digital signals to a processor for processing. The bipolar plate has a plurality of lead-out ways, and the following two ways are mainly used: the first method is to drill a hole on the bipolar plate, then insert a lead, drip silver glue, and realize connection after the silver glue is solidified; the second method is to insert metal sheets during the production of the bipolar plate, and then to connect with the lead by welding after the production of the galvanic pile is finished. However, the above-described conventional practice of connecting the bipolar plate to the lead wire has the following problems:
for the first method, holes are drilled in the bipolar plate, wires are inserted, and the connection is cured with silver paste. The method has the advantages of troublesome operation and low reliability, and the lead wire must be pretreated by adding tin to prevent the copper wire of the lead wire from being oxidized and prevent the lead wire from being scattered and connected with other bipolar plates to cause short circuit. Moreover, the process is strictly controlled by the silver paste dispensing, too much can be connected with other bipolar plates to cause short circuit, and too little can cause the connection reliability to be reduced. In addition, the silver paste generally needs to be left for a long time or be heated to shorten the curing time, and after curing, the silver paste is not so strong that the lead falls off with a little force, so that the lead reinforcing process is generally added.
In the second method, a metal sheet is sandwiched in the process of manufacturing the bipolar plate, and the process is also complicated and the production cost is high. Moreover, the wire and the metal sheet are welded finally, manual welding is generally needed, the production efficiency is low, and the reliability is not high.
[ summary of the invention ]
The invention aims to solve the defects and provide a contactor for a CVM and a bipolar plate of a hydrogen fuel cell stack, which greatly simplifies the working procedure, reduces the cost, greatly improves the reliability, is beneficial to batch production, and avoids the defects of poor consistency, low reliability and the like caused by manual operation.
In order to realize above-mentioned purpose design a contactor that is used for CVM and bipolar plate of hydrogen fuel cell pile, including
Further, 1 tilting of PCB board is installed on
Further, 1 tilting of PCB board is installed on
Furthermore, the number of the metal elastic sheets 4 is the same as that of the bipolar plates 3, and the metal elastic sheets are arranged in a one-to-one correspondence manner.
Furthermore, the upper end of the metal elastic sheet 4 is welded at the bottom end of the
Compared with the prior art, the invention provides a contactor of a CVM and a bipolar plate for a hydrogen fuel cell stack, which adopts a metal elastic sheet to be welded on a PCB (printed circuit board) through a machine paster, then the PCB is fixed on stack pressing plates at two sides of the stack, the metal elastic sheet is connected with the bipolar plate through the elasticity of the metal elastic sheet, and then the metal elastic sheet is connected with the bipolar plate through a connector on the PCB in a plugging and pulling way, thereby processes of punching, inserting a lead, dispensing, curing, reinforcing the lead and the like on the bipolar plate are not needed, processes of clamping the metal sheet, welding the lead and the like during the production of the bipolar plate are also not needed, the contactor greatly simplifies the processes, reduces the cost, greatly improves the reliability and is beneficial to batch production; and, through using PCB as the carrier, the component on the PCB all adopts the paster structure, and usable machine automation welding to production efficiency is high, has avoided the uniformity that is caused by manual operation poor, reliability low grade shortcoming. In addition, because the stack is formed by stacking a plurality of bipolar plates, if the pressure is different during assembly, the length of the stack is different, in order to prevent the installation error of the contactor caused by the length change of the stack, the invention is provided with a length adapting structure, the PCB is not vertically installed with a stack pressing plate, but is obliquely installed at a certain included angle, and the length change of the stack is adapted through a strip-shaped groove structure or a plurality of screw holes.
[ description of the drawings ]
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a first schematic diagram of a top view of the present invention;
FIG. 3 is a schematic top view of the present invention;
in the figure: 1.
[ detailed description of the invention ]
The invention is further described below with reference to the accompanying drawings:
as shown in the attached drawing, the invention provides a contactor of a CVM (continuously variable capacitor) and a bipolar plate for a hydrogen fuel cell stack, which comprises a PCB (printed Circuit Board) 1, stack pressing
The contactor uses the PCB as a carrier, all elements on the PCB adopt a surface mounted structure, and automatic welding can be carried out by a machine, so that the production efficiency is high, and the defects of poor consistency, low reliability and the like caused by manual operation are avoided. The contactor mainly comprises a PCB, a metal elastic sheet welded on the PCB, a connector welded on the PCB, and a lead printed on the PCB, wherein the metal elastic sheet welded on the PCB is used for being connected with a bipolar plate through elasticity, the connector welded on the PCB is used for being connected with an external lead, and the lead printed on the PCB is used for connecting the metal elastic sheet with the connector.
The invention has simple installation mode, and only two screws are needed to be fixed on the pile pressing plates at two sides of the pile. Since the stack is formed by stacking a plurality of bipolar plates, if the pressure is different during assembly, the length of the stack is different. In order to prevent the installation error of the contactor caused by the change of the pile length, the invention is provided with a length adapting structure, and the PCB is not vertically installed with the electric pile pressing plates at the two ends, but is obliquely installed at a certain included angle. One of the methods is as shown in figure 2, a PCB is obliquely installed on a pile
Because the pile compresses tightly degree and bipolar plate thickness and can have the error when different production batches, the length that finally leads to between the finished product pile clamp plate can be different, and the length after the PCB board is processed is fixed, consequently, the strip groove of scheme one and the a plurality of screw holes of scheme two, all be for the contained angle between adjustment PCB board and the pile clamp plate, the length that makes the length adaptation pile clamp plate of PCB board between the length, can make on the PCB board shell fragment just in time can the one-to-one contact to the bipolar plate like this.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.