Portable fuel cell residual electricity discharging device

Abstract

The utility model discloses a portable fuel cell residual electricity discharging device which comprises a device shell, an internal circuit and a connecting part, the internal circuit is connected with the connecting part, and the internal circuit and the connecting part are both installed on the device shell; the device shell comprises a shell body and a shell cover, the internal circuit comprises a load resistor, a fuse and a digital display voltmeter, the load resistor is connected with the fuse in series, the digital display voltmeter is connected with the load resistor in parallel, and the digital display voltmeter is connected with the fuse in parallel; and the load resistor, the fuse and the digital display voltmeter are fixedly connected in the shell. Compared with the prior art, the residual electricity inside the galvanic pile after the activation test is quickly consumed, so that the production safety is ensured, and the service life of the galvanic pile is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell structural design, and in particular to a portable fuel cell residual charge discharge device. Background Technology

[0002] In the post-performance testing process of fuel cells, the common method is to purge the stack and then allow it to stand until all residual electrical energy is completely consumed before proceeding with subsequent operations. However, after the activation test of the fuel cell stack, residual hydrogen cannot be completely purged out, causing the residual hydrogen to continue to undergo electrochemical reactions and generate electricity. This residual charge not only poses a significant safety hazard to operators but also affects the lifespan of the stack. Currently, there is a lack of portable residual charge discharge devices in production, which not only affects production efficiency but also threatens operational safety. Utility Model Content

[0003] In view of this, the present invention proposes a portable fuel cell residual charge discharge device, which rapidly consumes the residual charge inside the fuel cell stack after activation testing, thereby ensuring production safety and extending the service life of the fuel cell stack.

[0004] The technical solution of this utility model is as follows:

[0005] This utility model discloses a portable fuel cell residual charge discharge device, comprising a device shell, an internal circuit, and a connecting part. The internal circuit is connected to the connecting part, and both the internal circuit and the connecting part are mounted on the device shell. The device shell includes a housing and a cover. The internal circuit includes a load resistor, a fuse, and a digital voltmeter. The load resistor and the fuse are connected in series, and the digital voltmeter is connected in parallel with both the load resistor and the fuse. The load resistor, the fuse, and the digital voltmeter are all fixedly connected inside the housing.

[0006] Specifically, the housing edge is provided with a mounting groove, and the cover is provided with mounting buckles around its perimeter. The housing and the cover are connected to each other through the mounting groove and the buckles.

[0007] Specifically, the housing has heat dissipation holes on both sides, and a thermal insulation support is provided between the housing and the load resistor, with the thermal insulation support fixed to the housing.

[0008] Specifically, the heat dissipation holes are square and arranged symmetrically on both sides of the housing.

[0009] Specifically, the cover is provided with mounting holes, and the digital display voltmeter is fixedly connected to the cover through the mounting holes.

[0010] Specifically, both the housing and the cover are made of insulating plastic.

[0011] Specifically, the connection portion includes two alligator clips with wires, which are connected to the housing via the wires.

[0012] Specifically, the tail of the alligator clip is covered with insulating rubber.

[0013] This invention is mainly used for residual discharge after activation testing and other operating condition tests of fuel cell stacks. The device dissipates the residual charge in the stack through a load resistor and is equipped with a digital voltmeter to monitor the residual voltage. When the device experiences a current overload, the fuse will blow to protect the equipment. This device has the following advantages:

[0014] 1. Integrated design: Compact size, easy to use in various scenarios.

[0015] 2. Real-time monitoring: The digital voltmeter can monitor the discharge process in real time to ensure operational safety.

[0016] 3. Overload protection: The fuse will automatically blow when the current is overloaded to protect the equipment.

[0017] 4. Thermal insulation design: Thermal insulation material separates the load resistor from the casing to prevent the casing from melting due to the resistor heating up.

[0018] 5. Flexible connection: The positive and negative poles are connected to the fuel cell stack using alligator clips, which is suitable for fuel cell stacks with different load copper busbar structures. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only one embodiment of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Identical parts are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "bottom surface," "top surface," "inner," and "outer" refer to directions toward or away from the geometric center of a specific part, respectively.

[0021] Figure 1 This is a schematic diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the internal circuitry in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the device housing in an embodiment of this utility model.

[0024] The meanings of the reference numerals in the above figures are as follows:

[0025] 1. Device casing;

[0026] 11. Shell; 12. Shell cover;

[0027] 2. Load resistance;

[0028] 3. Fuse;

[0029] 4. Digital voltmeter;

[0030] 5. Thermal insulation support;

[0031] 6. Alligator clips. Detailed Implementation

[0032] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments and accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] Unless otherwise defined, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having” and any variations thereof in the specification, claims and foregoing description of the invention are intended to cover non-exclusive inclusion.

[0034] In the description of the specific embodiments of this utility model, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this utility model, "multiple" means two or more, unless otherwise explicitly defined.

[0035] In this invention, the reference to "embodiment" means that a specific feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this invention can be combined with other embodiments.

[0036] In the description of this utility model embodiment, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, in this utility model, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0037] Throughout this invention, numerical values ​​represent approximate measurements or limits of a range to cover minute deviations from a given value, as well as embodiments having approximately the mentioned value and embodiments having the exact mentioned value. Except for the working examples provided at the end of the detailed description, all numerical values ​​of parameters, quantities, or conditions in the appended claims should be understood to be modified in all cases by the term “about,” regardless of whether “about” actually appears before the numerical value. “About” indicates that the stated numerical value allows for some minute inaccuracy that is somewhat close to the exact value of the value; approximately or reasonably close to the value; almost. If the inaccuracy provided by “about” is not otherwise understood in this common sense in the art, then “about” as used in this invention at least indicates a variation that can be produced by common methods of measuring and using such parameters. For example, “about” may include a variation of less than or equal to 5%, optionally less than or equal to 4%, optionally less than or equal to 3%, optionally less than or equal to 2%, optionally less than or equal to 1%, optionally less than or equal to 0.5%, and in some respects, optionally less than or equal to 0.1%.

[0038] Additionally, the disclosure of the range includes the disclosure of all values ​​across the entire range and the disclosure of further subdivided ranges, including the endpoints and subranges given for these ranges.

[0039] The embodiments of the present invention will be described in more detail below through examples. It should be noted that the embodiments of the present invention are not limited to these examples.

[0040] In the post-performance testing process of fuel cells, the common method is to purge the stack and then allow it to stand until all residual electrical energy is completely consumed before proceeding with subsequent operations. However, after the activation test of the fuel cell stack, residual hydrogen cannot be completely purged out, causing the residual hydrogen to continue to undergo electrochemical reactions and generate electricity. This residual charge not only poses a significant safety hazard to operators but also affects the lifespan of the stack. Currently, there is a lack of portable residual charge discharge devices in production, which not only affects production efficiency but also threatens operational safety.

[0041] In view of this, the present invention proposes a portable fuel cell residual charge discharge device, which rapidly consumes the residual charge inside the fuel cell stack after activation testing, thereby ensuring production safety and extending the service life of the fuel cell stack.

[0042] The technical solution of this utility model is as follows:

[0043] In one specific embodiment, such as Figures 1-3 As shown, a portable fuel cell residual charge discharge device includes a device housing 1, an internal circuit, and a connecting part. The internal circuit is connected to the connecting part, and both the internal circuit and the connecting part are mounted on the device housing 1. The device housing 1 includes a shell 11 and a cover 12. The internal circuit includes a load resistor 2, a fuse 3, and a digital voltmeter 4. The load resistor 2 and the fuse 3 are connected in series, and the digital voltmeter 4 is connected in parallel with the load resistor 2 and the fuse 3. The load resistor 2, the fuse 3, and the digital voltmeter 4 are all fixedly connected inside the shell 11.

[0044] In some embodiments, the housing 11 is provided with a mounting groove along its edge, and the cover 12 is provided with mounting buckles around its perimeter. The housing 11 and the cover 12 are connected by the mounting groove and the buckles.

[0045] In some embodiments, heat dissipation holes are provided on both sides of the housing 11, and a heat insulation support 5 is provided between the housing 11 and the load resistor 2, with the heat insulation support 5 fixed on the housing 11.

[0046] In some alternative embodiments, the heat dissipation holes are square and arranged symmetrically on both sides of the housing 11.

[0047] In some embodiments, the housing 12 is provided with mounting holes, through which the digital display voltmeter 4 is fixedly connected to the housing 12.

[0048] In some alternative embodiments, both the housing 11 and the cover 12 are made of insulating plastic.

[0049] In some embodiments, the connection portion includes two alligator clips 6 with wires, which are connected to the housing 11 via wires.

[0050] In some alternative implementations, the tail of the alligator clip 6 is covered with insulating rubber.

[0051] Through the above settings, this invention rapidly consumes the residual electricity inside the fuel cell stack after activation testing, ensuring production safety and extending the stack's service life. The working principle is mainly that the device consumes the residual electricity in the fuel cell stack through the load resistor 2, and is equipped with a digital voltmeter 4 to monitor the residual voltage of the fuel cell stack. When the device experiences a current overload, the fuse 3 will blow to protect the equipment.

[0052] The specific working process of this utility model is as follows: After the fuel cell stack activation test purging is completed, the alligator clips 6 of the device are connected to the positive and negative terminals of the copper busbar of the stack load respectively. The load resistor 2 begins to consume the residual charge of the stack. The digital display voltmeter 4 monitors the remaining voltage of the stack in real time. When the voltage drops to within the safe range, the discharge is considered complete. If the current exceeds the maximum safe value, the fuse 3 blows to ensure the safety of the stack and the device.

[0053] It should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A portable fuel cell residual charge discharge device, characterized in that, It includes a device housing, an internal circuit, and a connecting part, wherein the internal circuit is connected to the connecting part, and both the internal circuit and the connecting part are mounted on the device housing; The device housing includes a housing and a cover, and the internal circuit includes a load resistor, a fuse, and a digital voltmeter. The load resistor is connected in series with the fuse, and the digital voltmeter is connected in parallel with the load resistor and the digital voltmeter is connected in parallel with the fuse. The load resistor, the fuse, and the digital voltmeter are all fixedly connected inside the housing.

2. The portable fuel cell residual charge discharge device as described in claim 1, characterized in that, The housing has a mounting slot along its edge, and the cover has mounting buckles around its perimeter. The housing and the cover are connected by the mounting slots and the buckles.

3. A portable fuel cell residual charge discharge device as described in claim 2, characterized in that, The housing has heat dissipation holes on both sides, and a heat insulation support is provided between the housing and the load resistor, with the heat insulation support fixed to the housing.

4. A portable fuel cell residual charge discharge device as described in claim 3, characterized in that, The heat dissipation holes are square and arranged symmetrically on both sides of the housing.

5. A portable fuel cell residual charge discharge device as described in claim 4, characterized in that, The housing cover is provided with mounting holes, and the digital display voltmeter is fixedly connected to the housing cover through the mounting holes.

6. A portable fuel cell residual charge discharge device as described in claim 5, characterized in that, Both the housing and the cover are made of insulating plastic.

7. A portable fuel cell residual charge discharge device as described in claim 1, characterized in that, The connection portion includes two alligator clips with wires, which are connected to the housing via the wires.

8. A portable fuel cell residual charge discharge device as described in claim 7, characterized in that, The tail of the alligator clip is covered with insulating rubber.

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