Voltage acquisition terminal, voltage acquisition device and fuel cell system

Abstract

The utility model provides a voltage acquisition terminal, a voltage acquisition device and a fuel cell system, the voltage acquisition terminal comprises a pin and a sleeve sleeved on the pin in a sliding manner; a plurality of elastic terminals are arranged at the insertion end of the contact pin, each elastic terminal is arranged in a manner of expanding outwards along the radial direction of the contact pin and can be clamped in a voltage acquisition hole of a component to be acquired, and the sleeve is used for enabling each elastic terminal to enter the sleeve when the sleeve slides towards the insertion section of the contact pin. The voltage acquisition terminal provided by the utility model is convenient to plug and unplug, has better connection stability, is beneficial to solving the problems of inconvenience in use and poorer connection stability of the traditional pin, has excellent corrosion resistance, avoids the situation that the test result is influenced by oxidation corrosion, and improves the test efficiency. Therefore, voltage collection of the fuel cell system is facilitated, and the product quality of the fuel cell system is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a voltage acquisition terminal. The utility model also relates to a voltage acquisition device provided with the voltage acquisition terminal, and a fuel cell system provided with the voltage acquisition device. Background Art

[0002] Hydrogen energy and fuel cell systems are important pathways to clean energy supply and optimize energy consumption. They are widely applicable across a wide range of sectors, including aerospace, transportation, industrial production, and household life. In a fuel cell system, the fuel cell stack is where the electrochemical reaction occurs and electricity is generated. A fuel cell stack typically consists of dozens or even hundreds of individual cells connected in series. The operating status of each cell directly impacts the performance and lifespan of the entire stack.

[0003] In addition, the voltage of a single cell is the most intuitive parameter indicator reflecting the working status of a single cell. Therefore, a single cell voltage acquisition device (CVP) is required to monitor the voltage of the single cells in the battery stack online in real time. When it is found that the voltage of a single cell exceeds the safe voltage range, the system can take corresponding fault handling measures in time, or adjust the whole machine operation control strategy to ensure the normal operation of the battery stack, thereby protecting the battery stack and extending the service life of the battery stack.

[0004] However, existing cell voltage collection devices (CVPs) mainly include pin-type, adhesive-type, spring-type, and elastic-ring-type. Pin-type CVP technology collects cell voltage signals by inserting a pin for collecting voltage reference into an inspection hole provided on the side of the bipolar plate. However, the existing technology suffers from poor connection reliability between the pin and the inspection hole, making it difficult to withstand the impact and vibration under operating conditions. In severe cases, the pin can easily loosen and fall off, resulting in voltage signal loss, making voltage collection more difficult and detrimental to improving the quality of fuel cell products. Utility Model Content

[0005] In view of this, the present invention aims to provide a voltage collection terminal for a fuel cell, which has good collection stability.

[0006] In order to achieve the above-mentioned purpose, the technical solution of the utility model is achieved as follows:

[0007] A voltage collection terminal comprises a pin and a sleeve slidably sleeved on the pin;

[0008] The insertion end of the pin is provided with a plurality of elastic terminals, each of which is arranged to expand radially outward along the pin and can be clamped in the voltage collection hole of the component to be collected, and when the sleeve is used to slide toward the insertion section of the pin, each of the elastic terminals can enter the sleeve.

[0009] Furthermore, the plurality of elastic terminals are evenly arranged along the circumference of the pin.

[0010] Furthermore, the number of the elastic terminals is between 2 and 12.

[0011] Furthermore, the elastic terminal includes a connecting portion having one end connected to the plug pin, and a hook portion provided at the other end of the connecting portion.

[0012] Furthermore, the end of the hook portion is chamfered.

[0013] Furthermore, a plurality of the elastic terminals are integrally formed on the pins.

[0014] Furthermore, the pins and / or the elastic terminals are made of titanium alloy material.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] The voltage collection terminal of the fuel cell described in the utility model can first gather together multiple elastic terminals by sliding a sleeve to facilitate the insertion of multiple elastic terminals into the voltage collection hole. Then, the sleeve can be slid again to make the multiple elastic terminals expand outward and pop out and clamped in the voltage collection hole, thereby preventing the pin from falling off from the voltage collection hole. This not only facilitates the connection between the voltage collection terminal and the voltage collection hole, but also improves the connection stability between the two and realizes stable voltage collection, thereby benefiting the improvement of the quality of fuel cell products.

[0017] Furthermore, evenly distributing multiple elastic terminals along the circumference of the pin improves the stability of their connection with the voltage collection hole during expansion. Setting the number of elastic terminals between 2 and 12 facilitates the fabrication of the voltage collection terminal and ensures a stable connection between the pin and the voltage collection hole. The elastic terminal primarily comprises a connecting portion and a hook portion, resulting in a simple structure that reduces fabrication complexity and cost.

[0018] Secondly, the chamfered end of the hook facilitates smooth insertion of the elastic terminal into the sleeve, facilitating the bundling of multiple elastic terminals and facilitating insertion and removal of the pin from the voltage collection port. The multiple elastic terminals are integrally formed on the pin, ensuring overall structural strength and stability. Both the pin and the elastic terminals are constructed from titanium alloy, addressing the corrosion vulnerability of conventional pins and enabling this voltage collection terminal to maintain robust data collection in a variety of harsh environments.

[0019] In addition, another object of the present invention is to provide a voltage collection device, in which the voltage collection terminal as described above is provided.

[0020] In addition, another object of the present invention is to provide a fuel cell system, in which the above-mentioned voltage acquisition device is provided.

[0021] Furthermore, the voltage collection device is used to collect the voltage of a single cell in the fuel cell system; the component to be collected is a bipolar plate in the single cell, and the voltage collection hole is an inspection hole on the bipolar plate.

[0022] The voltage collection device and fuel cell system described in the present invention are both provided with the above-mentioned voltage collection terminal, which can greatly increase the connection stability between the pin and the voltage collection hole, so that the pin is locked and will not fall off, thereby ensuring the effect of voltage collection and improving the product quality of the fuel cell system. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0024] Figure 1 This is a schematic structural diagram of the voltage acquisition terminal according to an embodiment of the present utility model;

[0025] Figure 2 This is a structural diagram of the multiple elastic terminals and the voltage collection holes according to an embodiment of the present utility model;

[0026] Figure 3 This is a schematic structural diagram of the chamfer according to an embodiment of the present utility model;

[0027] Figure 4 This is a structural diagram of an embodiment of the present utility model when there are four elastic terminals;

[0028] Figure 5 This is a structural diagram of an embodiment of the present utility model when there are eight elastic terminals;

[0029] Description of reference numerals:

[0030] 11. Pin; 111. Elastic terminal; 1111. Connecting portion; 1112. Hook portion; 11121. Chamfer; 12. Sleeve;

[0031] 2. Components to be collected; 21. Voltage collection hole. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0033] In the following description, specific details such as specific system structures and techniques are provided for purposes of illustration rather than limitation to facilitate a thorough understanding of the embodiments of the present application. However, it will be apparent to those skilled in the art that the present application may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid obscuring the description of the present application with unnecessary detail.

[0034] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," and "outer" appear to indicate orientation or positional relationships, these are based on the orientation or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, if terms such as "first" and "second" appear, they are used solely for descriptive purposes and should not be construed as indicating or implying relative importance.

[0035] Furthermore, in the description of this utility model, unless otherwise explicitly defined, the terms "mounted," "connected," "connection," and "connector" should be interpreted broadly. For example, they can refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0036] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0037] Example 1

[0038] This embodiment relates to a voltage collection terminal, which can solve the problem of easy falling off and corrosion of the traditional pin 11, thereby improving the stability of voltage collection and ensuring the accuracy of the collection results.

[0039] In terms of overall structure, Figure 1 As shown, the voltage collection terminal of this embodiment includes a pin 11 and a sleeve 12 that is slidably mounted on the pin 11. Furthermore, a plurality of elastic terminals 111 are provided at the insertion end of the pin 11. Each elastic terminal 111 is radially outwardly arranged along the pin 11 and can be snapped into the voltage collection hole 21 of the component 2 to be collected. When the sleeve 12 slides toward the insertion end of the pin 11, each elastic terminal 111 can enter the sleeve 12.

[0040] At this time, as set above, the sleeve 12 can be manipulated to slide so that the multiple elastic terminals 111 are first gathered together, so that the multiple elastic terminals 111 can be inserted into the voltage collection hole 21. Then, the sleeve 12 can be slid again to make the multiple elastic terminals 111 expand outward and pop out and clamped in the voltage collection hole 21, thereby preventing the pin 11 from falling off from the voltage collection hole 21. This not only facilitates the connection between the voltage collection terminal and the voltage collection hole 21, but also improves the connection stability between the two and the stable collection of voltage.

[0041] Based on the above overall introduction, in detail, in this embodiment, when it is necessary to pull out the pin 11 from the voltage collection hole 21, the multiple elastic terminals 111 can be first gathered in the sleeve 12 and then pulled out. In this way, the convenience of pulling out the pin 11 can be improved.

[0042] Secondly, it is worth mentioning that the voltage acquisition terminal of this embodiment is particularly suitable for collecting the voltage of each single cell in a fuel cell system. It is typically used in conjunction with a voltage inspection meter in a voltage acquisition device. In the fuel cell system, the component to be collected 2 can be a bipolar plate in a single cell, and the voltage acquisition hole 21 can be an inspection hole on the bipolar plate. Of course, related structural components not mentioned in the voltage acquisition terminal, voltage acquisition device, and fuel cell system of this embodiment can all be referred to fuel cell products well known to those skilled in the art and will not be described in detail here.

[0043] In this embodiment, as a preferred implementation form, Figure 1 and Figure 2 As shown, multiple elastic terminals 111 are evenly arranged along the circumference of the pin 11. It is understandable that evenly distributing multiple elastic terminals 111 along the circumference of the pin 11 can help improve the stability of the connection between the multiple elastic terminals 111 and the voltage collection hole 21 when expanding outward.

[0044] At this time, see Figure 1 、 Figure 4 and Figure 5As shown, in this embodiment, as a preferred implementation form, the number of elastic terminals 111 is between 2 and 12. The advantage of such a setting is that it is convenient for preparing the voltage collection terminal and can ensure the connection stability between the pin 11 and the voltage collection hole 21.

[0045] In specific implementation, the number of the elastic terminals 111 in this embodiment can be as follows: Figure 4 The four shown in , or as Figure 5 The eight shown in the figure are used to reduce the difficulty of manufacturing the voltage collection terminal while ensuring a good connection effect of the pin 11. Moreover, the cross-section of the pin 11 of this embodiment is preferably set to be circular, and the cross-section when the multiple elastic terminals 111 are folded together is preferably the same circular shape as the pin 11.

[0046] In addition, see Figure 3 As shown, in this embodiment, as a preferred implementation form, the elastic terminal 111 includes a connecting portion 1111 connected to the pin 11 at one end, and a hook portion 1112 provided at the other end of the connecting portion 1111. It can be understood that the elastic terminal 111 mainly includes the connecting portion 1111 and the hook portion 1112, which simplifies the structure and helps reduce the difficulty and cost of manufacturing.

[0047] And, as a preferred embodiment, continue to refer to Figure 3 As shown in FIG, the end of the hook portion 1112 of this embodiment is provided with a chamfer 11121 to facilitate the smooth entry of the elastic terminal 111 into the sleeve 12, that is, to facilitate the bundling of multiple elastic terminals 111 together, and to facilitate the insertion or removal of the pin 11 from the voltage collection hole 21. Figure 3 In the state shown, as a preferred arrangement, the top and bottom of the hook portion 1112 are both provided with chamfers 11121 to facilitate the sleeve 12 to retract the multiple elastic terminals 111 .

[0048] Furthermore, in this embodiment, as a preferred implementation form, multiple elastic terminals 111 are integrally formed on the pin 11 to ensure the overall structural strength of the pin 11 and its stability in use. At the same time, the integral molding setting is also conducive to ensuring the molding quality of the pin 11.

[0049] It's also worth noting that conventional pins 11 often use cylindrical copper or aluminum wires, which can easily oxidize over time, leading to poor contact and increased resistance, affecting test results. Therefore, as a preferred implementation, in this embodiment, both the pins 11 and each elastic terminal 111 are made of titanium alloy. This takes advantage of the excellent corrosion resistance of titanium alloy, addressing the corrosion vulnerability of conventional pins 11 and ensuring that this voltage acquisition terminal maintains excellent data acquisition stability in a variety of harsh environments.

[0050] Moreover, it is understandable that since the titanium alloy material has a memory function, it is also beneficial to the deformation restoration of each elastic terminal 111, that is, each elastic terminal 111 has better elastic performance, thereby improving the use effect and life of the pin 11.

[0051] The voltage collection terminal of this embodiment not only has good corrosion resistance, but also facilitates the connection between the voltage collection terminal and the voltage collection hole 21, and can improve the connection stability between the two to achieve stable voltage collection. This can solve the problem that the surface of the traditional pin 11 is easily oxidized after long-term use, resulting in poor contact and increased resistance, as well as the problem of insufficient connection stability between the traditional pin 11 and the voltage collection hole 21, thereby benefiting the improvement of the quality of fuel cell products.

[0052] Example 2

[0053] This embodiment relates to a voltage acquisition device, which is provided with the voltage acquisition terminal in Embodiment 1. This embodiment also relates to a fuel cell system, which is provided with the voltage acquisition device described above.

[0054] In specific implementation, in the above-mentioned fuel cell system, as a preferred embodiment, the voltage acquisition device of this embodiment is used to collect the voltage of a single cell in the fuel cell system, and as described in Example 1, the component 2 to be collected is the bipolar plate in the single cell, and the voltage collection hole 21 is the inspection hole on the bipolar plate.

[0055] The voltage collection device and fuel cell system of this embodiment, by configuring the voltage collection terminal of the first embodiment, can solve the problems of easy oxidation of the surface of the traditional pin 11 after long-term use and insufficient connection stability between the traditional pin 11 and the voltage collection hole 21, thereby having better voltage collection stability and collection result accuracy, thereby improving the quality of fuel cell products.

[0056] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A voltage acquisition terminal, characterized by: It comprises an insertion pin (11) and a sleeve (12) slidably sleeved on the insertion pin (11); The insertion end of the plug pin (11) is provided with a plurality of elastic terminals (111), each of the elastic terminals (111) is arranged to expand radially outwards along the plug pin (11) and can be snapped into the voltage collection hole (21) of the component to be collected (2), and when the sleeve (12) is used to slide toward the insertion section of the plug pin (11), each of the elastic terminals (111) can enter the sleeve (12).

2. The voltage acquisition terminal according to claim 1, characterized in that: The plurality of elastic terminals (111) are evenly arranged along the circumference of the plug pin (11).

3. The voltage acquisition terminal according to claim 1, characterized in that: The number of the elastic terminals (111) is between 2 and 12.

4. The voltage acquisition terminal according to claim 1, characterized in that: The elastic terminal (111) comprises a connecting portion (1111) connected to the plug pin (11) at one end, and a hook portion (1112) provided at the other end of the connecting portion (1111).

5. The voltage acquisition terminal according to claim 4, characterized in that: The end of the hook portion (1112) is provided with a chamfer (11121).

6. The voltage acquisition terminal according to claim 1, characterized in that: A plurality of elastic terminals (111) are integrally formed on the plug pin (11).

7. The voltage acquisition terminal according to any one of claims 1 to 6, characterized in that: The insert pin (11) and / or each of the elastic terminals (111) are made of titanium alloy material.

8. A voltage acquisition device, characterized in that: The voltage collection device is provided with the voltage collection terminal according to any one of claims 1 to 7.

9. A fuel cell system, characterized in that: The fuel cell system is provided with the voltage acquisition device according to claim 8.

10. The fuel cell system according to claim 9, characterized in that: The voltage acquisition device is used to acquire the voltage of a single cell in the fuel cell system; The component to be collected (2) is a bipolar plate in the single battery, and the voltage collection hole (21) is an inspection hole on the bipolar plate.

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