Fuel cell monolithic voltage acquisition device

Abstract

The utility model discloses a monolithic voltage acquisition device for a fuel cell, which relates to the technical field of fuel cells and comprises a bipolar plate, a probe plate, a probe, a probe groove formed in one side of a cooling surface of the bipolar plate, and a voltage acquisition module, according to the fuel cell monolithic voltage acquisition device, the stainless steel probe design is adopted, the bending portion of the stainless steel probe is inserted into the probe groove to be matched with the probe groove by means of the elasticity of the stainless steel probe, so that the voltage of the fuel cell monolithic voltage acquisition device can be acquired, and the voltage of the fuel cell monolithic voltage acquisition device can be acquired. A simple and efficient support structure can be realized, the problems of probe virtual connection, easy falling in vibration and the like are solved, and the installation is convenient; meanwhile, the vibration requirements in all directions in the actual working condition can be met, the probe can be in good contact with the polar plate, the vibration requirements in all directions of a vehicle can be met, and meanwhile the influence of accumulated tolerance caused by stacking can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a fuel cell single-chip voltage acquisition device. Background Art

[0002] The core unit of a fuel cell is the stack, which consists of a single cell, a power-collecting end plate, and a fastening device. The theoretical output voltage of a single cell is only 1.229V at most, and when current flows, it is about 0.7-0.8V. This means that to provide a usable voltage, multiple single cells must be connected in series through bipolar plates.

[0003] The fuel cell single-chip voltage acquisition device is an important device used to monitor the voltage of each single cell in the fuel cell stack in real time. In practical applications, the fuel cell single-chip voltage acquisition device is widely used in various fuel cell systems, such as transportation (such as new energy vehicles), household appliances, aerospace and other fields. By monitoring the voltage changes of single cells in real time, potential fault problems can be discovered and handled in a timely manner to ensure the safe and stable operation of the fuel cell system.

[0004] When collecting voltage on a single fuel cell chip, the probe is usually soldered directly onto the circuit board to achieve a high degree of product integration. There are three specific ways to use the probe:

[0005] Solution 1: Retractable probe

[0006] The probe is assembled from three parts, two sleeves connected by a spring. The compression and rebound of the spring solve the problem of probe loosening caused by vehicle vibration during actual use. However, this solution can only meet the vibration of the vehicle in one direction. In actual operation, the vehicle vibrates in multiple directions, namely, X, Y, and Z directions. The telescopic probe can meet the vibration in the Z direction. As for the vibration in the XY directions, the two sleeves of this solution will be stuck because the probe has no elasticity, thus losing the telescopic function.

[0007] Solution 2: Sliding probe

[0008] The probe is installed in a base plate with a guide groove. The probe moves in the Z-axis in the guide groove. The solution is similar to Solution 1. It can only meet the vibration in the Z direction and cannot meet the vibration in the XY direction.

[0009] Solution 3: Spring wire probe

[0010] The spring wire probe is tough and can meet the vibration requirements of the vehicle in all directions. However, because the steel wire is thin, it cannot guarantee good contact with the fuel cell, and there will be deviations between the actual data and the feedback data.

[0011] In summary, the present invention provides a fuel cell single-chip voltage acquisition device. Utility Model Content

[0012] In view of the deficiencies in the prior art, the present invention provides a fuel cell single-chip voltage acquisition device, which solves the problems raised by the above-mentioned background technology.

[0013] To achieve the above objectives, the present invention is implemented through the following technical solutions: A fuel cell single-chip voltage acquisition device, including a bipolar plate and a probe plate, further comprising:

[0014] a probe, one end of which is mounted on the probe plate;

[0015] A probe groove is provided on one side of the cooling surface of the bipolar plate;

[0016] One end of the probe extending into the probe groove is provided with a bent portion, and one end of the bent portion is provided with a pointed end in an angled form.

[0017] As a further technical solution of the present invention, one end of the probe is connected to an external detection device through a probe plate, and the other end of the probe extends into a probe slot.

[0018] As a further technical solution of the present invention, the probe groove is rectangular, and the inner corners of the probe groove are arc angles. A limiting step is added in the probe groove to prevent the probe from falling off.

[0019] As a further technical solution of the present invention, the curved portion of the probe extending into the probe groove is arc-shaped.

[0020] As a further technical solution of the present invention, the probe groove is rectangular, and the inner corners of the probe groove are right angles, and the curved portion of the probe extending into the probe groove is diamond-shaped.

[0021] As a further technical solution of the present invention, the probe is made of stainless steel.

[0022] The utility model provides a fuel cell single-chip voltage acquisition device, which has the following beneficial effects compared with the existing technology:

[0023] A fuel cell single-chip voltage acquisition device designed in this paper adopts a stainless steel probe design. The stainless steel probe uses its own elasticity to extend its bent portion into the probe groove to cooperate with it, which can realize a simple and efficient support structure. At the same time, it solves the problems of probe virtual connection and easy falling off during vibration, and is easy to install. At the same time, it can meet the vibration requirements in various directions in actual working conditions, and can not only ensure that the probe can make good contact with the plate, but also meet the vibration requirements of the vehicle in various directions. At the same time, it can solve the influence of cumulative tolerance caused by stacking. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of the probe slot in Example 1;

[0025] Figure 2 is a cross-sectional view of the probe groove in Example 1;

[0026] Figure 3 This is a schematic diagram of the state when the probe is not inserted into the probe slot in Example 2;

[0027] Figure 4 This is a schematic diagram of the state of the probe when it is inserted into the probe slot in Example 2.

[0028] In the figure: 1. Bipolar plate; 2. Probe plate; 3. Probe; 4. Probe slot; 5. Limiting step. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] Example 1

[0031] like Figure 1 and 2 As shown, a fuel cell single-chip voltage acquisition device includes a bipolar plate 1 and a probe plate 2, and also includes:

[0032] A probe 3, one end of which is mounted on the probe plate 2 and connected to an external detection device through the probe plate 2, and the other end of which extends into the probe slot 4;

[0033] The probe groove 4 is provided on the cooling surface side of the bipolar plate 1. The probe groove 4 is rectangular, and the inner corners of the probe groove 4 are arc angles. A limiting step 5 is added in the probe groove 4 to prevent the probe 3 from falling off.

[0034] One end of the probe 3 extending into the probe slot 4 is provided with a bent portion, and one end of the bent portion is provided with a tip in an angled form. The bent portion of the probe 3 extending into the probe slot 4 is arc-shaped.

[0035] In this embodiment, a limiting step 5 is added to the probe groove 4 of the bipolar plate 1. The other side of the probe groove 4 of the bipolar plate 1 is a flat plate. There is a certain height difference between the limiting step 5 and the flat plate to facilitate the insertion of the probe 3. After insertion, it is moved toward the bottom of the probe groove 4. The blocking of the limiting step 5 and the elasticity of the probe 3 itself can prevent it from falling out. Moreover, the probe is made of 316L stainless steel and has good bending strength. After the probe 3 is inserted into the probe groove 4, it contacts the groove edge of the probe groove 4 through its own elasticity to conduct electricity. Moreover, the tip of the tail of the probe 3 penetrates into the interior of the bipolar plate 1, which can destroy the oxide layer on the surface of the bipolar plate 1 and is more conducive to conductivity.

[0036] Example 2

[0037] like Figure 3 and 4 As shown, a fuel cell single-chip voltage acquisition device includes a bipolar plate 1 and a probe plate 2, wherein the probe 3 is made of stainless steel, and further includes:

[0038] A probe 3, one end of which is mounted on the probe plate 2 and connected to an external detection device through the probe plate 2, and the other end of which extends into the probe slot 4;

[0039] The probe groove 4 is opened on the cooling surface side of the bipolar plate 1. The probe groove 4 is rectangular, and the internal corner of the probe groove 4 is a right angle. One end of the probe 3 extending into the probe groove 4 is provided with a bending portion, and one end of the bending portion is provided with a tip in the form of an angle. The bending portion of the probe 3 extending into the probe groove 4 is diamond-shaped.

[0040] In this embodiment, the inner corner of the probe groove 4 is designed to be a right angle, and the curved portion of the probe 3 is designed to be a diamond shape, so that the curved portion of the probe 3 is conveniently inserted into the probe groove 4. Due to its own elasticity, it can be better fixed in the probe groove 4 and is not easy to fall off. The pointed tip at the tail end can pierce the oxide layer of the bipolar plate 1, which is more conducive to conductivity, thereby ensuring detection accuracy. Secondly, as Figure 4 As shown, when the probe 3 is not inserted into the probe slot 4, its curved portion is approximately 90 degrees rhombus. When the curved portion is inserted into the probe slot 4, it is squeezed by the probe slot 4 and the elasticity of the curved portion itself, so that the curved portion inserted into the probe slot 4 becomes a flat rhombus. Figure 3 shown.

[0041] The above description is merely a preferred embodiment of the present invention. It should be noted that those skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications should be considered within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described or explained in this invention shall, unless otherwise specified or limited, be implemented in accordance with conventional means in the art.

Claims

1. A fuel cell single-chip voltage acquisition device, comprising a bipolar plate (1) and a probe plate (2), characterized in that: Also includes: A probe (3), one end of which is mounted on the probe plate (2); A probe groove (4) is provided on one side of the cooling surface of the bipolar plate (1); One end of the probe (3) extending into the probe groove (4) is provided with a bent portion, and one end of the bent portion is provided with a pointed end in an angled form.

2. A fuel cell single-chip voltage acquisition device according to claim 1, characterized in that: One end of the probe (3) is connected to an external detection device through a probe plate (2), and the other end of the probe (3) extends into a probe slot (4).

3. A fuel cell single-chip voltage acquisition device according to claim 1, characterized in that: The probe groove (4) is rectangular, and the inner corners of the probe groove (4) are arc angles. A limiting step (5) for preventing the probe (3) from falling off is added in the probe groove (4).

4. A fuel cell single-chip voltage acquisition device according to claim 3, characterized in that: The curved portion of the probe (3) extending into the probe groove (4) is arc-shaped.

5. The fuel cell single-chip voltage acquisition device according to claim 1, characterized in that: The probe groove (4) is rectangular, and the inner corner of the probe groove (4) is a right angle, and the curved portion of the probe (3) extending into the probe groove (4) is rhombus-shaped.

6. A fuel cell single-chip voltage acquisition device according to claim 1, characterized in that: The probe (3) is made of stainless steel.

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