阅读说明：本技术 一种用于燃料电池的电池成组连接结构及连接方法 (Battery grouping connection structure and connection method for fuel battery ) 是由 王煦阳 苏岳锋 陈来 冉艳 杨晨星 于 2020-12-08 设计创作，主要内容包括：本发明提供一种用于燃料电池的电池成组连接结构及连接方法,涉及燃料电池技术领域,其中一种用于燃料电池的电池成组连接结构,包括燃料电池堆单元、第一连接板以及第二连接板,燃料电池堆单元包括电池主体、第一极板和第二极板,第一连接板上设置有第一延伸板和第二延伸板,第二延伸板设置有活动板,第一连接板上设置有第一凹槽,第一延伸板上设置有电磁件,活动板上设置有磁性件,活动板为弧形,第二连接板设置有凸起块、卡槽和第二凹槽,第一延伸板和第二连接板的数量均至少为一个。本发明结构简单,组装方便,对燃料电池堆组装,当电压大于一定值时自动不可再次叠加,组装精度高,安装效率高,傻瓜式操作,出错率低,适用性广。(The invention provides a battery grouping connection structure and a connection method for a fuel battery, and relates to the technical field of fuel batteries, wherein the battery grouping connection structure for the fuel battery comprises a fuel battery stack unit, a first connection plate and a second connection plate, the fuel battery stack unit comprises a battery main body, a first polar plate and a second polar plate, the first connection plate is provided with a first extension plate and a second extension plate, the second extension plate is provided with a movable plate, the first connection plate is provided with a first groove, the first extension plate is provided with an electromagnetic part, the movable plate is provided with a magnetic part, the movable plate is arc-shaped, the second connection plate is provided with a convex block, a clamping groove and a second groove, and the number of the first extension plate and the second connection plate is at least one. The invention has simple structure, convenient assembly, automatic non-overlapping when the voltage is larger than a certain value, high assembly precision, high installation efficiency, simple operation, low error rate and wide applicability.)

1. A cell gang connection structure for a fuel cell, characterized in that: the fuel cell stack comprises a fuel cell stack unit (1), a first connecting plate (2) and a second connecting plate (3), wherein the fuel cell stack unit (1) comprises a cell main body (11), a first polar plate (12) arranged at the end part of the cell main body (11) and a second polar plate (13) arranged at one end, far away from the first polar plate (12), of the cell main body (11), a first extending plate (21) and a second extending plate (22) are arranged on the first connecting plate (2), one side, close to the first extending plate (21), of the second extending plate (22) is connected with a movable plate (23) through a spring (221), a first groove (24) used for being connected with the first polar plate (12) is arranged on the first connecting plate (2), the first groove (24) is arranged between the first extending plate (21) and the movable plate (23), be provided with on first extension board (21) with electromagnetism piece (211) that first recess (24) electricity is connected, be provided with magnetism spare (25) on fly leaf (23), fly leaf (23) are close to one side of first extension board (21) has at least partly for the arc, second connecting plate (3) tip is provided with protruding piece (31), second connecting plate (3) are kept away from the one end of protruding piece (31) is provided with draw-in groove (32), second connecting plate (3) side be provided with be used for with second recess (33) that second polar plate (13) are connected, the quantity of first extension board (21) and second connecting plate (3) all is one at least, the length of second connecting plate (3) is not less than adjacent two distance between first extension board (21).

2. A cell gang connection structure for a fuel cell according to claim 1, wherein: the movable plate (23) is close to one side of the first extension plate (21) and comprises a straight edge (231), a first arc-shaped edge (232) and a second arc-shaped edge (233), the second arc-shaped edge (233) is arranged on one side, away from the second connecting plate (3), of the first arc-shaped edge (232), the straight edge (231) is arranged on one side, close to the second connecting plate (3), of the first arc-shaped edge (232), the first arc-shaped edge (232) is a part of a regular arc edge, and the second arc-shaped edge (233) is a part of an elliptic arc edge.

3. A cell gang connection structure for fuel cells as claimed in claim 2, wherein: the straight edge (231) is tangent to the first arcuate edge (232), and the first arcuate edge (232) is tangent to the second arcuate edge (233).

4. A cell gang connection structure for a fuel cell according to claim 3, wherein: an angle between the straight edge (231) and the first extension plate (21) is not smaller than an angle between the first arc-shaped edge (232) and the first extension plate (21), and an angle between the first arc-shaped edge (232) and the first extension plate (21) is not smaller than an angle between the second arc-shaped edge (233) and the first extension plate (21).

5. A cell gang connection structure for a fuel cell according to claim 1, wherein: the first connecting plate (2) and the second connecting plate (3) are both conductive plates.

6. A cell gang connection structure for a fuel cell according to claim 1, wherein: at least one part of each of the first connecting plate (2) and the second connecting plate (3) is arc-shaped.

7. A cell gang connection structure for a fuel cell according to claim 1, wherein: at least one part of one side of the battery main body (11) close to the movable plate (23) is arc-shaped.

8. The method of connecting a cell gang connection structure for fuel cells as claimed in any one of claims 1 to 7, characterized by comprising the steps of:

s1: a plurality of groups of first extension plates, second extension plates and movable plates are arranged on one side, close to the second connecting plate, of the first connecting plate;

s2: arranging a cell main body of the fuel cell stack unit on one side of the first connecting plate close to the second connecting plate, so that one end of the cell main body close to the first polar plate is inserted into the first groove between the first extending plate and the movable plate;

s3: a second connecting plate is arranged at one end, close to the second polar plate, of the battery main body, so that the second polar plate is inserted into a second groove of the second connecting plate, and a convex block at the end part of the second connecting plate is inserted into a clamping groove of the second connecting plate below the second polar plate;

s4: after the second connecting plate is inserted, the two pole plates of the fuel cell stack unit are successfully connected, the electromagnetic part in the first extending plate is electrified, the electrified voltage is the sum of the voltages of all the installed fuel cell stack units, and the electromagnetic part generates magnetism to attract the magnetic part in the movable plate, so that the movable plate approaches to the first extending plate;

s5: judging whether the movable plate extrudes the first polar plate at the end part of the cell main body out of the first groove or not, if so, the fuel cell stack unit cannot be installed; on the contrary, the second connecting plate at the end of the fuel cell stack unit is fixed, and the step S2 is continuously performed until the movable plate presses the first electrode plate of the cell main body out of the first groove.

9. The connecting method of a cell gang connecting structure for a fuel cell according to claim 8, characterized in that:

when step S1 is executed, the side edge of the movable plate on the side close to the first extending plate is composed of a straight edge, a first arc-shaped edge taken from a part of the circular arc edge, and a second arc-shaped edge taken from a part of the elliptical arc edge, the straight edge is tangent to the first arc-shaped edge, and the first arc-shaped edge is tangent to the second arc-shaped edge.

10. The connecting method of a cell gang connecting structure for a fuel cell according to claim 8, characterized in that:

after step S3 is performed, all the fuel cell stack units are connected in parallel by the first and second connecting plates having conductivity at both ends of the fuel cell stack units.

Technical Field

The invention relates to the technical field of fuel cells, in particular to a cell grouping connection structure and a cell grouping connection method for a fuel cell.

Background

In the face of the challenges of fossil energy depletion and environmental problems, the replacement of fossil energy with new energy is a necessary trend in social development. Hydrogen energy has received much attention in recent years as a clean renewable energy source; as an important aspect of hydrogen energy application, the fuel cell automobile industry has been developed in recent years, and the fuel cell has advantages that the fuel cell is efficient because it converts gibbs free energy of chemical energy of fuel into electric energy by electrochemical reaction, and is not limited by carnot cycle effect; in addition, fuel cells use fuel and oxygen as raw materials; meanwhile, no mechanical transmission part is arranged, so that no noise pollution is caused, and the discharged harmful gas is little and the pollution is small.

In practical applications, the fuel cell is not used as a single cell, but is typically used in the form of a fuel cell stack. In a large-scale fuel cell device for power generation, such as several tens of Kilowatts (KW) to several Megawatts (MW), a large capacity is obtained by connecting a plurality of small-capacity fuel cell stacks (stacks). For example, chinese patent application CN104752741A provides a fuel cell stack connection control device and a control method thereof, wherein the fuel cell stack connection control device includes a plurality of n fuel cell stacks and a power adjusting unit connected to the plurality of fuel cell stacks, and the control device includes: a memory that stores a first threshold value for starting an operation of the fuel cell stack connection control device, a second threshold value including 0 to the first threshold value, and a boundary value for dividing the second threshold value into at least two small ranges; a plurality of stack voltage sensing parts which respectively sense voltages of the plurality of fuel cell stacks; and a control section that determines whether the sensed voltage decreases by the first threshold value or more, and controls an operation of the conversion section so as to group one or more fuel cell stacks having voltages respectively associated with the at least two small ranges in each group when the sensed voltage decreases by the first threshold value or more.

However, the fuel cell stack renting connection method still has the following problems: the assembly mode is complicated, voltage judgment of one connection is required to be carried out every time a unit of fuel cell stack is assembled, the efficiency is low, all electronic devices need splicing experience of workers to assemble and read data, the requirement on the installation experience of battery group installation is high, errors can occur, and the installation effect is not ideal.

Therefore, in order to solve the above problems, it is necessary to design a reasonably efficient cell grouping connection structure for fuel cells.

Disclosure of Invention

The invention aims to provide a cell grouping connection structure for fuel cells, which has the advantages of simple structure, convenient assembly, no need of detection once every time a fuel cell stack is installed, automatic non-overlapping when the voltage is greater than a certain value when the fuel cell stack is assembled, high assembly precision, high installation efficiency, simple operation, low operation requirement and low error rate, and is suitable for various fuel cell stack assembly conditions.

In order to achieve the purpose, the invention is realized by adopting the following technical scheme:

a battery grouping connection structure for a fuel battery comprises a fuel battery stack unit, a first connection plate and a second connection plate, wherein the fuel battery stack unit comprises a battery main body, a first pole plate arranged at the end part of the battery main body and a second pole plate arranged at one end of the battery main body far away from the first pole plate, a first extension plate and a second extension plate are arranged on the first connection plate, a movable plate is arranged at one side, close to the first extension plate, of the second extension plate through spring connection, a first groove used for being connected with the first pole plate is arranged on the first connection plate, the first groove is arranged between the first extension plate and the movable plate, an electromagnetic piece electrically connected with the first groove is arranged on the first extension plate, a magnetic piece is arranged on the movable plate, and at least one part of one side, close to the first extension plate, of the movable plate is arc-shaped, the end part of the second connecting plate is provided with a convex block, one end of the second connecting plate, which is far away from the convex block, is provided with a clamping groove, the side edge of the second connecting plate is provided with a second groove used for being connected with the second pole plate, the number of the first extending plates and the second connecting plate is at least one, and the length of the second connecting plate is not less than two adjacent distances between the first extending plates.

Preferably, one side of the movable plate, which is close to the first extending plate, includes a straight edge, a first arc-shaped edge and a second arc-shaped edge, the second arc-shaped edge is disposed on one side of the first arc-shaped edge, which is far from the second connecting plate, and the straight edge is disposed on one side of the first arc-shaped edge, which is close to the second connecting plate.

Preferably, the straight edge is tangent to the first arc-shaped edge, and the first arc-shaped edge is tangent to the second arc-shaped edge.

Preferably, the first arc-shaped side is a part of a regular arc-shaped side, and the second arc-shaped side is a part of an elliptical arc-shaped side.

Preferably, an angle between the straight edge and the first extension plate is not smaller than an angle between the first arc-shaped edge and the first extension plate, and an angle between the first arc-shaped edge and the first extension plate is not smaller than an angle between the second arc-shaped edge and the first extension plate.

Preferably, the first and second connection plates are conductive plates

Preferably, the number of the springs is at least one.

Preferably, at least a part of each of the first connecting plate and the second connecting plate is arc-shaped.

Preferably, at least a portion of one side of the battery main body adjacent to the movable plate is arc-shaped.

The present invention also provides a method for connecting a cell gang connection structure for a fuel cell, comprising the steps of:

s1: a plurality of groups of first extension plates, second extension plates and movable plates are arranged on one side, close to the second connecting plate, of the first connecting plate;

s2: transversely arranging a cell main body of the fuel cell stack unit on one side of the first connecting plate close to the second connecting plate, so that one end of the cell main body close to the first polar plate is inserted into the first groove between the first extending plate and the movable plate;

s3: a second connecting plate is arranged at one end, close to the second polar plate, of the battery main body, so that the second polar plate is inserted into a second groove of the second connecting plate, and a convex block at the end part of the second connecting plate is inserted into a clamping groove of the second connecting plate below the second polar plate;

s4: after the second connecting plate is inserted, the two pole plates of the fuel cell stack unit are successfully connected, the electromagnetic part in the first extending plate is electrified, the electrified voltage is the sum of the voltages of all the installed fuel cell stack units, and the electromagnetic part generates magnetism to attract the magnetic part in the movable plate, so that the movable plate approaches to the first extending plate;

s5: judging whether the movable plate extrudes the cell main body out of the first groove or not, if so, the fuel cell stack unit cannot be installed; on the contrary, the second connecting plate at the end of the fuel cell stack unit is fixed, and the step S2 is continuously performed until the movable plate presses the cell main body out of the first groove.

As a preferable aspect of the present invention, in step S1, the side edge of the movable plate on the side close to the first extending plate is composed of a straight edge, a first arc-shaped edge taken from a part of the circular arc-shaped edge, and a second arc-shaped edge taken from a part of the elliptical arc-shaped edge, the straight edge is tangent to the first arc-shaped edge, and the first arc-shaped edge is tangent to the second arc-shaped edge.

In a preferred embodiment of the present invention, after step S3 is executed, all the fuel cell stack units are connected in parallel by the first connecting plate and the second connecting plate having conductivity at both ends of the fuel cell stack units.

The invention relates to a battery grouping connection structure and a connection method for a fuel battery, which have the beneficial effects that: simple structure, the equipment is convenient, need not to pile every fuel cell of installation and just detects once, when assembling fuel cell, can not superpose once more automatically when voltage is greater than a definite value, and the equipment precision is high, and the installation effectiveness is high, fool's operation, and the operation requirement is low, and the error rate is low, applicable in various fuel cell pile equipment condition.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a cell gang connection structure for a fuel cell of the invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

fig. 3 is a schematic structural view of a movable plate in an embodiment of a cell grouping connection structure for a fuel cell according to the present invention;

FIG. 4 is a schematic view showing an installation flow of a connection method of a cell gang connection structure for a fuel cell according to the present invention;

in the figure: 1. the fuel cell stack unit, 11, the cell main part, 12, the first polar plate, 13, the second polar plate, 2, first connecting plate, 21, first extension board, 211, electromagnetism piece, 22, the second extension board, 221, spring, 23, the fly leaf, 231, straight flange, 232, first arc limit, 233, the second arc limit, 24, first recess, 25, magnetism piece, 3, the second connecting plate, 31, protruding piece, 32, draw-in groove, 33, the second recess.

Detailed Description

The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.

Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the modules and steps set forth in these embodiments and steps do not limit the scope of the invention unless specifically stated otherwise.

Meanwhile, it should be understood that the flows in the drawings are not merely performed individually for convenience of description, but a plurality of steps are performed alternately with each other.

The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

Techniques, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.

The first embodiment is as follows: as shown in fig. 1 to 4, which are only one embodiment of the present invention, a cell grouping connection structure for a fuel cell includes a fuel cell stack unit 1, a first connection plate 2 and a second connection plate 3, the fuel cell stack unit 1 includes a cell main body 11, a first pole plate 12 disposed at an end of the cell main body 11, and a second pole plate 13 disposed at an end of the cell main body 11 away from the first pole plate 12, the first connection plate 2 is provided with a first extension plate 21 and a second extension plate 22, one side of the second extension plate 22 close to the first extension plate 21 is provided with a movable plate 23 by a spring 221, the first connection plate 2 is provided with a first groove 24 for connecting with the first pole plate 12, the first groove 24 is disposed between the first extension plate 21 and the movable plate 23, the first extension plate 21 is provided with an electromagnet 211 electrically connected with the first groove 24, the movable plate 23 is provided with a magnetic part 25, at least one part of one side of the movable plate 23 close to the first extension plate 21 is arc-shaped, the end part of the second connection plate 3 is provided with a protrusion block 31, one end of the second connection plate 3 far away from the protrusion block 31 is provided with a clamping groove 32, the side edge of the second connection plate 3 is provided with a second groove 33 used for being connected with the second pole plate 13, the number of the first extension plate 21 and the second connection plate 3 is at least one, and the length of the second connection plate 3 is not less than the distance between two adjacent first extension plates 21.

In the present invention, the fuel cell stack unit 1 is disposed between a first connection plate 2 and a second connection plate 3, the first connection plate 2 is connected with a first electrode plate 12 of the fuel cell stack unit 1, the second connection plate 3 is connected with a second electrode plate 13 of the fuel cell stack unit 1, a plurality of fuel cell stack units 1 are disposed between the first connection plate 2 and the second connection plate 3, when the first connecting plate 2 and the second connecting plate 3 are both conductive members, the voltage between the first connecting plate 2 and the second connecting plate 3 is equal to the sum of the voltages of the plurality of fuel cell stack units 1 (the resistances of the first connecting plate 2 and the second connecting plate 3 are ignored), the whole fuel cell stack unit 1, the first connecting plate 2 and the second connecting plate 3 form a large-scale fuel cell to discharge outwards, at this time, the first connecting plate 2 is a discharge electrode, and the second connecting plate 3 is another discharge electrode.

Firstly, a fuel cell stack unit 1, a first connecting plate 2 and a second connecting plate 3 are connected, a first groove 24 is arranged on the first connecting plate 2, a second groove 33 is arranged on the second connecting plate 3, the fuel cell stack unit 1 comprises a cell main body 11, a first pole plate 12 arranged at the end part of the cell main body 11 and a second pole plate 13 arranged at one end of the cell main body 11 far away from the first pole plate 12, the first pole plate 12 is inserted into the first groove 24, the second pole plate 13 is inserted into the second groove 33, the connection of the fuel cell stack unit 1, the first connecting plate 2 and the second connecting plate 3 is completed, and a plurality of fuel cell stack units 1 are connected in parallel.

It should be noted that the first connecting plate 2 is an integral plate, but the second connecting plates 3 are multiple, the end portions of the second connecting plates 3 are provided with protruding blocks 31, one end of the second connecting plate 3, which is far away from the protruding blocks 31, is provided with a clamping groove 32, and one second connecting plate 3 is inserted into the clamping groove 32 of the other second connecting plate 3 through the protruding blocks 31 at the end portions, so that the splicing of the multiple second connecting plates 3 is completed.

Then, the structure of the first connection plate 2 is described, the first extension plate 21 and the second extension plate 22 are disposed on the first connection plate 2, the movable plate 23 is disposed on one side of the second extension plate 22 close to the first extension plate 21 through the connection of the spring 221, the first groove 24 is disposed between the first extension plate 21 and the movable plate 23, the movable plate 23 is disposed between the first extension plate 21 and the second extension plate 22 and can extend and retract toward the first extension plate 21 under the elasticity of the spring 221, and when the fuel cell stack unit 1 is connected to the first connection plate 2, the first electrode plate 12 is inserted into the first groove 24, and the cell body 11 is disposed between the first extension plate 21 and the movable plate 23.

The number of the first extension plates 21 is at least one, and the same, the number of the second extension plates 22, the movable plate 23 and the first grooves 24 is at least one, in fact, a group of connection units consisting of one first extension plate 21, one second extension plate 22, one movable plate 23 and one first groove 24 is used for connecting one fuel cell stack unit 1, and the length of the second connection plate 3 is not less than the distance between two adjacent first extension plates 21, generally, the length of the second connection plate 3 is not equal to the distance between two adjacent first extension plates 21, so that each time one fuel cell stack unit 1 is installed, one second connection plate 3 can be installed, and the installation of multiple groups of fuel cell stack units 1 is completed in sequence.

Finally, for the control of the total voltage when multiple sets of fuel cell stack units 1 are connected, the first extension plate 21 is provided with the electromagnetic element 211 electrically connected with the first groove 24, the movable plate 23 is provided with the magnetic element 25, after multiple fuel cell stack units 1 are installed between the first connection plate 2 and the second connection plate 3, it can be understood that a large-scale fuel cell capable of discharging is formed, at this time, the electromagnetic element 211 on the first extension plate 21 is electrified, the electrified voltage of the electromagnetic element 211 is equal to the sum of the voltages of all the fuel cell stack units 1, the electromagnetic element 211 is electrified to generate magnetism, magnetic attraction is generated on the magnetic element 25 on the movable plate 23, the movable plate 23 is attracted to the first extension plate 21, and it should be noted that the larger the electrified voltage of the electromagnetic element 211 (the sum of the voltages of all the fuel cell stack units 1), the stronger the magnetism of the magnetic element 211 is, the greater the attraction capacity of the movable plate 23, the greater the displacement of the movable plate 23 toward the first extension plate 21 under the magnetic attraction force, until the sum of the voltages of all the fuel cell stack units 1 is too large (exceeds a certain threshold), the movable plate 23 presses the cell main body 11 between the movable plate 23 and the first extension plate 21 under the magnetic attraction force, and at least a part of the side of the movable plate 23 close to the first extension plate 21 is arc-shaped, so that the cell main body 11 is pressed until the first electrode plate 12 is separated from the first groove 24, and at this time, it can be directly considered that a new fuel cell stack unit 1 should not be assembled.

That is, when all the fuel cell stack units 1 are grouped in parallel, if the sum of the voltages of all the fuel cell stack units 1 does not reach the predetermined threshold, normal installation is possible; on the contrary, once one fuel cell stack unit 1 is newly installed and the sum of the voltages of all the fuel cell stack units 1 is greater than the predetermined threshold, the fuel cell stack unit 1 cannot be installed.

And in order to avoid the previously installed fuel cell stack unit 1 from being detached from the first connection plate 2, there may be two arrangements:

firstly, every time a fuel cell stack unit 1 and a second connecting plate 3 are installed, if the fuel cell stack unit 1 is not separated from the first connecting plate 2, the second connecting plate 3 is fixedly connected with other second connecting plates 3 which are installed previously; if a certain fuel cell stack unit 1 is detached from the first connecting plate 2 when being installed, the fuel cell stack unit 1 and the second connecting plate 3 behind the fuel cell stack unit are not fixedly installed;

secondly, the solenoid 211 may be switched, and only the solenoid 211 at the newly installed fuel cell stack unit 1 is in a circuit closed state, the movable plate 23 is away from the first extension plate 21 under the tension of the spring 221, and the solenoids 211 at the already installed fuel cell stack units 1 are in a circuit open state, and the already installed fuel cell stack units 1 cannot be pushed out.

Generally, the first method is more suitable for fixing all the fuel cell stack units 1 that have been installed, and facilitating transportation and use.

In summary, the cell grouping connection steps of a large fuel cell are as follows: firstly, arranging a plurality of groups of first extension plates 21, second extension plates 22, movable plates 23 and first grooves 24 on one side, close to the second connecting plate 3, of the first connecting plate 2; arranging the cell main body 11 of the fuel cell stack unit 1 on one side of the first connecting plate 2 close to the second connecting plate 3, so that one end of the cell main body 11 close to the first electrode plate 12 is inserted into the first groove 24 between the first extending plate 21 and the movable plate 23; then, a second connecting plate 3 is arranged at one end of the battery body 11 close to the second pole plate 13, so that the second pole plate 13 is inserted into a second groove 33 of the second connecting plate 3, and the convex block 31 at the end part of the second connecting plate 3 is inserted into a clamping groove 32 of the second connecting plate 3 below; at this time, the second connecting plate 3 is inserted and connected, then the two pole plates of the fuel cell stack unit 1 are successfully connected, the electromagnetic element 211 in the first extending plate 21 is energized, the energizing voltage is the sum of the voltages of all the installed fuel cell stack units 1, and the electromagnetic element 211 generates magnetic attraction to the magnetic element 25 in the movable plate 23, so that the movable plate 23 approaches to the first extending plate 21; finally, judging whether the movable plate 23 extrudes the first polar plate 12 of the cell main body 11 out of the first groove 24, if so, the fuel cell stack unit 1 cannot be installed; on the contrary, the second connecting plate 3 at the end of the fuel cell stack unit 1 is fixed, and the next fuel cell stack unit 1 is continuously mounted until the movable plate 23 presses the first plate 12 of the cell body 11 of the fuel cell stack unit 1 being mounted out of the first groove 24, so that the fuel cell stack unit 1 cannot be mounted.

The battery grouping connection structure for the fuel battery has the advantages of simple structure, convenient assembly, no need of detecting once every time one fuel battery stack is installed, automatic non-overlapping when the voltage is greater than a certain value during the assembly of the fuel battery stack, high assembly precision, high installation efficiency, simple operation, low operation requirement and low error rate, and is suitable for various fuel battery stack assembly conditions.

In the second embodiment, as also shown in fig. 1 to 3, which is only one embodiment of the present invention, based on the first embodiment, in the battery grouping connecting structure for a fuel cell of the present invention, preferably, a side of the movable plate 23 close to the first extending plate 21 includes a straight edge 231, a first arc-shaped edge 232, and a second arc-shaped edge 233, the second arc-shaped edge 233 is disposed on a side of the first arc-shaped edge 232 away from the second connecting plate 3, the straight edge 231 is disposed on a side of the first arc-shaped edge 232 close to the second connecting plate 3, the straight edge 231 is tangent to the first arc-shaped edge 232, the first arc-shaped edge 232 is tangent to the second arc-shaped edge 233, the first arc-shaped edge 232 is a part of a regular arc-shaped edge, and the second arc-shaped edge 233 is a part of an elliptical arc-shaped edge, as shown in fig. 3.

At this time, it is also required that the angle between the straight edge 231 and the first extension plate 21 is not smaller than the angle between the first arc-shaped edge 232 and the first extension plate 21, and the angle between the first arc-shaped edge 232 and the first extension plate 21 is not smaller than the angle between the second arc-shaped edge 233 and the first extension plate 21, and it should be noted that, the closer to the first connection plate 2, the smaller the angle between the movable plate 23 and the first extension plate 21, and accordingly, the greater the displacement amount of the movable plate 23 pressing the cell main body 11 so that the first electrode plate 12 is separated from the first groove 24 per unit length of the movable plate 23 close to the first extension plate 21, the greater the voltage of the fuel cell to be assembled (up to several megawatts), the voltage change of each fuel cell stack unit 1 can only be small relative to the total voltage, and the movable plate 23 is actually displaced only a small amount toward the first extension plate 21, this makes it possible to convert the amount of displacement of the small movable plate 23 into a large displacement of the cell main body 11 as much as possible, so that the mounting accuracy of the plurality of fuel cell stack units 1 is higher.

And at least a portion of one side of the battery main body 11 close to the movable plate 23 is arc-shaped, which is more convenient for the battery main body 11 to be pressed by the movable plate 23 to displace.

It should be noted that, the first arc-shaped edge 232 is a part of a regular arc-shaped edge, the second arc-shaped edge 233 is a part of an elliptical arc-shaped edge, and in the process that the movable plate 23 moves from the end far away from the first connecting plate 2 to the end close to the first connecting plate 2, not only the angle between the movable plate 23 and the first extending plate 21 becomes smaller, but also the speed at which the angle between the movable plate 23 and the first extending plate 21 becomes smaller gradually, and what is more, the speed at which the angle between the movable plate 23 and the first extending plate 21 becomes smaller also passes through three sequentially smaller variation amounts, so that the farther the battery main body 11 is away from the first connecting plate 2, the smaller the displacement amount of the battery main body 11 is, and the smaller the speed at which the displacement amount becomes smaller, even the speed at which the displacement amount becomes smaller passes through three sequentially smaller variation speeds, so as to ensure that no matter what kind of fuel is, which all have the best accuracy and the best squeeze displacement amount without causing the battery body 11 to be broken by being detached from the first connection plate 2 too quickly.

Third embodiment, as also shown in fig. 1 to 3, which is only one embodiment of the present invention, based on the first embodiment, in the battery grouped connecting structure for a fuel cell of the present invention, the number of the springs 211 is at least one, so that the movable plate 23 is displaced toward the first extending plate 21 as a whole, and the pressing force on the battery main body 11 is more uniform.

Also, the first connecting plate 2 and the second connecting plate 3 are at least partially arc-shaped, and there are two explanations here:

firstly, the edges of the first connecting plate 2 and the second connecting plate 3 are arc-shaped, so that the cell frames can be conveniently installed at the outer sides of the first connecting plate 2 and the second connecting plate 3, and all the fuel cell stack units 1, the first connecting plate 2 and the second connecting plate 3 can be conveniently installed for use;

secondly, the first connecting plate 2 and the second connecting plate 3 are arc-shaped extending, generally speaking, the first connecting plate 2 and the second connecting plate 3 are two plate bodies parallel to each other, but in order to save the occupied space of the whole cell stack, the first connecting plate 2 and the second connecting plate 3 can be annular, and the second connecting plate 3 is located outside the first connecting plate 2, that is, outside the first connecting plate 2 arranged in an annular shape, the fuel cell stack unit 1 and the second connecting plate 3 are sequentially installed, it should be noted that the head and the tail ends of the first connecting plate 2 and the second connecting plate 3 can not be connected together, and short circuit is avoided.

In the second explanation, the length of the second connecting plate 3 is greater than the distance between two adjacent first extension plates 21, and the circumference of the circle of the outer ring is greater than the circumference of the circle of the inner ring.

And it is further possible in the context of the second explanation that the first connecting plate 2 is a helically flared arc, and that a helically flared second connecting plate 3 is mounted on the outside of the first connecting plate 2 of the helically flared arc.

In a fourth embodiment, as shown in fig. 4, the present invention further provides a method for connecting a cell gang connection structure for a fuel cell in all the above embodiments, comprising the steps of:

s1: a plurality of groups of first extension plates, second extension plates and movable plates are arranged on one side, close to the second connecting plate, of the first connecting plate;

s2: transversely arranging a cell main body of the fuel cell stack unit on one side of the first connecting plate close to the second connecting plate, so that one end of the cell main body close to the first polar plate is inserted into the first groove between the first extending plate and the movable plate;

s3: a second connecting plate is arranged at one end, close to the second polar plate, of the battery main body, so that the second polar plate is inserted into a second groove of the second connecting plate, and a convex block at the end part of the second connecting plate is inserted into a clamping groove of the second connecting plate below the second polar plate;

s4: after the second connecting plate is inserted, the two pole plates of the fuel cell stack unit are successfully connected, the electromagnetic part in the first extending plate is electrified, the electrified voltage is the sum of the voltages of all the installed fuel cell stack units, and the electromagnetic part generates magnetism to attract the magnetic part in the movable plate, so that the movable plate approaches to the first extending plate;

s5: judging whether the movable plate extrudes the cell main body out of the first groove or not, if so, the fuel cell stack unit cannot be installed; on the contrary, the second connecting plate at the end of the fuel cell stack unit is fixed, and the step S2 is continuously performed until the movable plate presses the cell main body out of the first groove.

When step S1 is executed, the side edge of the movable plate on the side close to the first extending plate is composed of a straight edge, a first arc-shaped edge taken from a part of the circular arc edge, and a second arc-shaped edge taken from a part of the elliptical arc edge, the straight edge is tangent to the first arc-shaped edge, and the first arc-shaped edge is tangent to the second arc-shaped edge.

After step S3 is performed, all the fuel cell stack units are connected in parallel by the first and second connecting plates having conductivity at both ends of the fuel cell stack units.

The battery grouping connection structure and the connection method for the fuel battery are simple in structure and convenient to assemble, detection is not needed once each fuel battery stack is installed, when the fuel battery stacks are assembled, the fuel battery stacks cannot be automatically overlapped again when the voltage is larger than a certain value, the assembly precision is high, the installation efficiency is high, the fuel battery grouping connection structure and the connection method are easy to operate, the operation requirement is low, the error rate is low, and the battery grouping connection structure and the connection method for the fuel battery are suitable for various fuel battery stack assembly conditions.

The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.