Fuel cell voltage acquisition component and fuel cell voltage monitoring device

Abstract

The utility model provides a fuel cell voltage acquisition component and a fuel cell voltage monitoring device. The fuel cell voltage acquisition component of the utility model includes a box body and a voltage acquisition module arranged on the box body; the voltage acquisition module includes a circuit board located in the box body, and a first electrical connection part and a second electrical connection part connected to the circuit board; an end of the first electrical connection part away from the circuit board extends from the first side of the box body, and is used to abut and connect with a battery cell in a battery stack, and an end of the second electrical connection part away from the circuit board extends from the second side of the box body, and is used to connect with an external voltage monitoring device. The fuel cell voltage acquisition component of the utility model is conducive to improving the convenience of use, and is also conducive to ensuring the reliability of electrical connection during use, thereby helping to improve the accuracy of voltage acquisition data, and further to improve the accuracy of fuel cell voltage monitoring data, and has a good use effect.

Description

Technical Field

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

[0002] Membrane Electrode Assembly (MEA), also known as membrane electrode, is a key core component of fuel cell power generation. The membrane electrode and the bipolar plates on both sides of the membrane electrode constitute the basic unit of the fuel cell - the fuel cell cell. The membrane electrode consists of a proton exchange membrane and catalyst layers on both sides. It separates hydrogen and oxygen and promotes the transmission of electrons and ions. It helps to convert hydrogen and oxygen into electrical energy. Fuel cell membrane electrode testing can measure the quality of membrane electrode products and provide assistance for future improvements. At the same time, with the help of some electrochemical testing methods, the working state of the membrane electrode can also be characterized. The accuracy of the data in the process of testing the membrane electrode of the fuel cell voltage monitoring device has a great impact on the subsequent development progress and development direction.

[0003] In the prior art, fuel cell voltage monitoring is usually done by punching holes and inserting pins on the cathode flow field plate and the anode flow field plate, or by fixing the voltage monitoring line to the current collector with bolts. However, the use of the punching and inserting pin connection method has the risk of an unreliable connection leading to an emergency stop of the test. The method of fixing the voltage monitoring line to the current collector by bolts is prone to inaccurate voltage monitoring data due to the loss of contact resistance between the graphite plate and the current collector, and when the voltage monitoring line is fixed to the current collector by bolts, the frequent disassembly will affect the work efficiency. Utility Model Content

[0004] In view of this, the utility model aims to provide a fuel cell voltage acquisition component to improve the convenience of use and the reliability of electrical connection during use.

[0005] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0006] A fuel cell voltage acquisition component,

[0007] It comprises a box body, and a voltage collection module arranged on the box body;

[0008] The voltage acquisition module includes a circuit board located in the box body, and a first electrical connection portion and a second electrical connection portion connected to the circuit board;

[0009] One end of the first electrical connection portion away from the circuit board extends out from the first side of the box body and is used to abut and connect with the battery cell in the battery stack. One end of the second electrical connection portion away from the circuit board extends out from the second side of the box body and is used to connect with an external voltage monitoring device.

[0010] Furthermore, the first electrical connection portion includes a spring pin connected to the circuit board, and the spring pin is abutted and connected to the electrode plate in the battery cell; the box body has a first via hole penetrating the first side surface, and the spring pin extends from the first via hole to the outside of the box body.

[0011] Furthermore, the spring ejector pins are multiple and arranged at intervals, each of the spring ejector pins is provided with the first via hole, and each of the spring ejector pins is used to abut and connect with different battery cells in the battery stack.

[0012] Furthermore, the second electrical connection portion includes an electrical connection connector connected to the circuit board, the box body has a second via hole penetrating the second side surface, and the electrical connection connector extends from the second via hole to the outside of the box body.

[0013] Furthermore, the electrical connection connector is a quick-connect connector.

[0014] Furthermore, the box body is provided with a connecting hole, and the box body can be fixed on an external carrier through a connecting piece located in the connecting hole.

[0015] Furthermore, the connecting hole is an elongated hole, and the connecting member can move along the length direction of the connecting hole.

[0016] Furthermore, the box body includes a base and a cover plate that are snap-fitted together, and a accommodating cavity for accommodating the circuit board is formed between the base and the cover plate; the first side surface is the side of the base facing the battery unit; the second side surface is the side of the cover plate away from the base, or the second side surface is the side where the side portion of the cover plate is located.

[0017] Furthermore, the base and the cover are detachably connected.

[0018] Compared with the prior art, the utility model has the following advantages:

[0019] The fuel cell voltage acquisition component described in the utility model sets the voltage acquisition module on the box body, and makes the first electrical connection part and the second electrical connection part extend from the first side surface and the second side surface of the box body respectively. In this way, the first connection part and the second connection part can be conveniently connected to the battery cells in the battery stack and the external voltage monitoring equipment respectively, which is beneficial to improving the convenience of use and also beneficial to ensuring the reliability of the electrical connection during use, thereby facilitating the improvement of the accuracy of the voltage acquisition data, and further facilitating the improvement of the accuracy of the fuel cell voltage monitoring data, and has a good use effect.

[0020] In addition, the first electrical connection part adopts a spring pin, and the spring pin passes through the first via hole and elastically contacts the plate in the battery unit, which can reduce the risk of test suspension due to the wiring harness falling off in the prior art, and the problem of inaccurate test data due to the loss of contact resistance, thereby further ensuring the reliability of the electrical connection between the first connection part and the plate. The spring pins are arranged in multiple intervals, and the first via hole is provided for each spring pin, which can ensure the safety of use and also provide better protection for the circuit board.

[0021] Secondly, the second electrical connection part adopts an electrical connection connector, which is conducive to the connection between the second connection part and the external voltage monitoring device. Moreover, the electrical connection connector adopts a quick-plug connector, which can further facilitate the connection with the voltage monitoring harness of the external voltage monitoring device, and can improve the convenience of use and installation efficiency. The connection hole is provided to facilitate the installation and fixation of the box body on the external carrier. Setting the connection hole as a long hole allows the connector to be fixed at different positions of the long hole, so that the installation position of the box body relative to the external carrier is adjustable, so that it can be suitable for voltage collection of battery stacks of different thicknesses, and can improve the versatility of the collection component.

[0022] In addition, the box body adopts a base and a cover plate that are connected by buckling, and a receiving cavity is arranged between the base and the cover plate, which has a simple structure and is conducive to the installation and fixation of the circuit board. The base and the cover plate are detachably connected, which is conducive to the disassembly and replacement of the voltage acquisition module.

[0023] Another object of the present invention is to provide a fuel cell voltage monitoring device, comprising a clamp that can be clamped on a fuel cell stack, the fuel cell voltage collection component as described above arranged on the clamp, and a voltage monitoring device connected to the second electrical connection portion.

[0024] The fuel cell voltage monitoring device of the present utility model can effectively ensure the reliability of the electrical connection between the voltage collection component and the battery unit by adopting the above-mentioned fuel cell voltage collection component, thereby improving the accuracy of the fuel cell voltage monitoring data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0026] Figure 1 It is a structural schematic diagram of the application state of the fuel cell voltage acquisition component according to an embodiment of the utility model;

[0027] Figure 2 This is a structural schematic diagram of the matching state of the fuel cell and the clamp according to the embodiment of the utility model;

[0028] Figure 3 This is a structural schematic diagram of a fuel cell voltage acquisition assembly according to an embodiment of the utility model from a first viewing angle;

[0029] Figure 4 This is a structural schematic diagram of a fuel cell voltage acquisition assembly according to an embodiment of the utility model from a second viewing angle;

[0030] Figure 5 This is a structural schematic diagram of the fuel cell voltage acquisition assembly according to an embodiment of the utility model from a third viewing angle;

[0031] Figure 6 This is a schematic diagram of the structure of the base according to an embodiment of the utility model;

[0032] Figure 7 This is a schematic diagram of the structure of the cover plate according to an embodiment of the utility model;

[0033] Figure 8 This is a schematic diagram of the structure of the voltage acquisition module described in an embodiment of the utility model;

[0034] Fig. 9 This is a structural schematic diagram of the voltage acquisition module and the base in the embodiment of the utility model;

[0035] Description of reference numerals:

[0036] 1. Box body; 2. Voltage acquisition module; 3. Second threaded connector; 4. First threaded connector; 6. Battery stack; 7. Clamp; 8. Connector;

[0037] 11. Base; 12. Cover; 21. Circuit board; 22. Spring ejector pin; 23. Quick connector; 60. Collector plate; 61. Battery cell; 71. First fixing hole; 101. Connecting hole; 110. First receiving groove; 111. First through hole; 112. First threaded hole; 113. Second threaded hole; 121. Second receiving groove; 122. Second through hole; 123. Second mounting hole; 210. First mounting hole; 211. Pre-set wire. DETAILED DESCRIPTION

[0038] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0039] In the description of the present invention, it should be noted that if there are terms such as "upper", "lower", "inner", "outer" and the like indicating orientation or positional relationship, they are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, if there are terms such as "first" and "second", they are also used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In addition, in the description of the present invention, unless otherwise clearly defined, the terms "installation", "connection", "connection" and "connector" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood in combination with specific circumstances.

[0041] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0042] Embodiment 1

[0043] The present embodiment relates to a fuel cell voltage acquisition component, which is conducive to improving the convenience of use and the reliability of electrical connection during use, and is conducive to improving the reliability of fuel cell acquisition data, and further helps to improve the accuracy of fuel cell voltage monitoring data.

[0044] In terms of overall structure, Figures 1 to 5 As shown, the fuel cell voltage acquisition assembly of this embodiment includes a box body 1, and a voltage acquisition module 2 arranged on the box body 1. The voltage acquisition module 2 includes a circuit board 21 located in the box body 1, and a first electrical connection part and a second electrical connection part connected to the circuit board 21. One end of the first electrical connection part away from the circuit board extends from the first side surface of the box body 1, and is used to abut and connect with the battery cell 61 in the battery stack 6, and one end of the second electrical connection part away from the circuit board extends from the second side surface of the box body 1, and is used to connect with an external voltage monitoring device.

[0045] At this time, the voltage acquisition module 2 is set on the box body 1, and the first electrical connection part and the second electrical connection part on the circuit board 21 extend from the first side and the second side of the box body 1 respectively, wherein the first side and the second side are different sides on the box body 1, so that the first connection part and the second connection part are respectively connected to the battery cell 61 in the battery stack 6 and the external voltage monitoring device, thereby helping to improve the convenience of use and also helping to ensure the reliability of electrical connection during use, thereby helping to improve the accuracy of voltage acquisition data and also helping to improve the accuracy of fuel cell voltage monitoring data.

[0046] Based on the above overall structure, in detail, as a preferred embodiment, the circuit board 21 of this embodiment preferably adopts a PCB circuit board 21, which can realize the voltage monitoring of multiple membrane electrodes and the voltage detection of the short stack fuel cell stack and the whole stack fuel cell stack. Among them, the medium stack fuel cell stack is a whole formed by connecting multiple fuel cell units 61 in parallel. The short stack fuel cell stack is a whole formed by combining a small number of fuel cell units 61 together.

[0047] Continue to view Figures 1 to 5 , and combined with Figure 8 As shown, in this embodiment, as a preference, the first electrical connection portion includes a spring pin 22 connected to the circuit board 21, the spring pin 22 is connected to the plate in the battery cell 61, the box body 1 has a first through hole 111 penetrating the first side surface, and the spring pin 22 extends from the first through hole 111 to the outside of the box body 1. In specific implementation, one end of the spring pin 22 is welded to the circuit board 21 and electrically connected to the preset wire 211 on the circuit board 21. The other end of the spring pin 22, that is, the end of the spring pin 22 away from the circuit board 21, passes through the first through hole 111 and extends to the outside of the box body 1, and when in use, the spring pin 22 elastically abuts against the cathode plate and the anode plate in the battery cell 61, which can reduce the risk of test suspension caused by the falling of the wire harness in the prior art, and the problem of inaccurate test data caused by the loss of contact resistance, thereby further ensuring the reliability of the electrical connection between the first connection portion and the plate.

[0048] Specifically, the spring ejector pins 22 are arranged in a plurality at intervals, and a first via hole 111 is provided corresponding to each spring ejector pin 22, and each spring ejector pin 22 is used to abut and connect with different battery cells 61 in the battery stack 6. The plurality of spring ejector pins 22 are respectively provided corresponding to the cathode plate and the anode plate in the battery cell 61, so that it is convenient to collect the pressure of each battery cell 61 in the battery stack 6. And a first via hole 111 is provided corresponding to each spring ejector pin 22, which can not only ensure the safety of use, but also play a better protective role on the circuit board.

[0049] Still viewing Figures 1 to 5 , and combined with Figure 8 As shown, the second electrical connection part of this embodiment, as a preferred embodiment, includes an electrical connection connector connected to the circuit board 21, the box body 1 has a second through hole 122 penetrating the second side surface, and the electrical connection connector extends to the outside of the box body from the second through hole 122. The provision of the electrical connection connector facilitates the connection of the second connection part with the voltage monitoring harness of the external voltage monitoring device.

[0050] As a further preferred embodiment, in this embodiment, the electrical connection connector adopts a quick-plug connector 23. In specific implementation, the quick-plug connector 23 is also welded and connected to the circuit board 21, and is also electrically connected to the preset wire 211 on the circuit board 21. At this time, the spring ejector 22 and the quick-plug connector 23 are connected through the preset wire 211. The quick-plug connector 23 can further facilitate the connection between the voltage acquisition module 2 and the voltage monitoring harness of the external voltage monitoring device, thereby improving the convenience of use and installation efficiency.

[0051] In order to facilitate the installation of the box body 1 on the external carrier, in this embodiment, a connection hole 101 is provided on the box body 1, and the box body 1 can be fixed on the external carrier through a connection member 8 located in the connection hole 101. The connection hole can be a circular hole or a long hole, and the connection hole can be arranged in the circumference of the box body or in the middle of the box body.

[0052] As a further preferred embodiment, in this embodiment, the connection hole 101 is a long hole, and the connector 8 can move along the length direction of the connection hole 101. The external carrier is, for example, a clamp 7 for clamping the battery stack 6, or other components for fixing the battery stack 6. By setting the connection hole 101 as a long hole and allowing the connector 8 to move along the length direction of the connection hole 101 to adjust the installation position of the box body 1 relative to the external carrier, it can be suitable for voltage collection of battery stacks of different thicknesses, and the versatility of the collection component can be improved.

[0053] See also Figures 3 to 9 As shown, the box body 1 of this embodiment includes a base 11 and a cover plate 12 that are snap-fitted together, and a receiving cavity for receiving the circuit board 21 is formed between the base 11 and the cover plate 12. By adopting the base 11 and the cover plate 12 that are snap-fitted together, the structure of the box body 1 is relatively simple, and it is also convenient to install and fix the circuit board 21. The above-mentioned first side surface is specifically the side of the base 11 facing the battery cell 61, and the above-mentioned second side surface is the side of the cover plate 12 away from the base, or the second side surface is the side where the side portion of the cover plate 12 is located. In this way, the first through hole 111 and the second through hole 122 are respectively arranged on different sides of the box body, which is not only conducive to the abutment connection between the spring ejector pin 22 and each battery cell, but also conducive to the quick-plug connector 23 and the external voltage monitoring device connector.

[0054] In terms of specific structure, a first accommodating groove 110 is provided on the base 11, and a second accommodating groove 121 is provided on the cover plate 12. When the cover plate 12 is buckled and connected to the base 11, the first accommodating groove 110 and the second accommodating groove 121 form an accommodating cavity for accommodating the circuit board 21.

[0055] Moreover, in order to facilitate the fixation of the circuit board 21 in the accommodating cavity, in the present embodiment, preferably, a plurality of first threaded holes 112 are provided at the bottom of the first accommodating groove 110, and the plurality of first threaded holes 112 correspond one-to-one to the first mounting holes 210 on the circuit board 21, and the circuit board 21 is fixedly installed in the first accommodating groove 110 by screwing the first threaded connector 4 provided in the first mounting hole 210 and the first threaded hole 112.

[0056] It should be noted that, in addition to providing the first receiving groove 110 on the base 11 and the second receiving groove 121 on the cover plate 12, it is also possible to provide only the first receiving groove 110 on the base 11, or only the second receiving groove 121 on the cover plate 12. In this case, a receiving cavity may be formed between the first receiving groove 110 and the side wall of the cover plate 12 facing the base 11, or a receiving cavity may be formed between the second receiving groove 121 and the side wall of the base 11 facing the cover plate 12. In addition, it should also be noted that, in addition to being fixed in the first receiving groove 110, the circuit board 21 may also be fixed in the second receiving groove 121.

[0057] In addition, in this embodiment, the base 11 and the cover 12 are detachably connected, which is conducive to the disassembly and replacement of the voltage acquisition module 2. Figures 4 to 9 As shown, a plurality of second mounting holes 123 are provided on the circumference of the cover plate 12, and a plurality of second threaded holes 113 are provided on the circumference of the base 11. The plurality of second mounting holes 123 correspond to the plurality of second threaded holes 113 one by one. The cover plate 12 is threadedly connected to the base 11 by threading the second threaded connector 3 passing through the second mounting holes 123 with the second threaded holes 113. This ensures the reliability of the connection between the cover plate 12 and the base 11, and also facilitates the detachability of the cover plate 12 and the base 11.

[0058] Of course, it is understandable that in addition to being screwed together, the cover 12 and the base 11 can also be connected by a snap-fit ​​structure provided between the cover 12 and the base 11, so that a detachable connection between the cover 12 and the base 11 can be achieved.

[0059] In this embodiment, the connection hole 101 is arranged on the box body 1, as a preferred embodiment, the connection hole 101 passes through the cover plate 12 and the base 11, and the long axis direction of the connection hole 101 is the same as the stacking direction of the battery cells 61 in the battery stack 6, so that the installation position of the box body 1 relative to the external carrier can be adjusted, thereby improving the versatility of use and the convenience of disassembly and assembly of the fuel cell voltage acquisition component.

[0060] The fuel cell voltage acquisition component of this embodiment can improve the convenience of use, and is also conducive to ensuring the reliability of electrical connection during use, thereby facilitating the improvement of the accuracy of voltage acquisition data, and the improvement of the accuracy of fuel cell voltage monitoring data, and has a good use effect.

[0061] Embodiment 2

[0062] The present embodiment relates to a fuel cell voltage monitoring device, which includes a clamp 7 that can be clamped on a fuel cell stack 6, a fuel cell voltage acquisition component of embodiment 1 arranged on the clamp 7, and a voltage monitoring device connected to the second electrical connection part.

[0063] Among them, look back Figure 1 and Figure 2 As shown, the battery stack 6 has a plurality of battery cells 61 stacked together, each of which has a membrane electrode, and a cathode plate and an anode plate connected to both sides of the membrane electrode. Along the stacking direction, current collecting plates 60 are respectively provided on the outermost battery cells. The clamp 7 includes a first clamp block and a second clamp block arranged at intervals, and the first clamp block and the second clamp block are respectively in contact with the current collecting plates 60 on both sides of the battery stack 6 to clamp the plurality of battery cells 61.

[0064] To facilitate the installation of the fuel cell voltage collection assembly, in this embodiment, a first fixing hole 71 is provided on the fixture 7, and the connecting hole 101 on the box body 1 corresponds to the first fixing hole 71. The box body 1 is fixed in the first fixing hole 71 by the connecting member 8 passing through the connecting hole 101, that is, the fuel cell voltage collection assembly is connected to the fixture 7. The connecting member 8 is preferably a bolt.

[0065] When in use, after the battery stack 6 to be tested is clamped on the fixture 7, the fuel cell voltage collection assembly is connected to the fixture 7 through the connector 8, and the spring pin 22 is elastically pressed against the cathode plate and anode plate of each battery unit 61. Then the quick-plug connector 23 is connected to the voltage monitoring harness of the external test equipment, so that the voltage of the battery stack 6 can be monitored.

[0066] The fuel cell voltage monitoring device of this embodiment, by adopting the fuel cell voltage acquisition component of the first embodiment, can effectively ensure the reliability of the electrical connection between the voltage acquisition component and the battery unit 61, thereby improving the accuracy of the fuel cell voltage monitoring data.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fuel cell voltage acquisition component, characterized in that: It comprises a box body (1), and a voltage collection module (2) arranged on the box body (1); The voltage acquisition module (2) comprises a circuit board (21) located in the box body (1), and a first electrical connection portion and a second electrical connection portion connected to the circuit board (21); One end of the first electrical connection portion away from the circuit board (21) extends out from the first side surface of the box body (1) and is used to abut and connect with the battery cell (61) in the battery stack (6); one end of the second electrical connection portion away from the circuit board (21) extends out from the second side surface of the box body (1) and is used to connect with an external voltage monitoring device.

2. The fuel cell voltage acquisition assembly according to claim 1, characterized in that: The first electrical connection portion comprises a spring pin (22) connected to the circuit board (21), the spring pin (22) being abutted and connected to a pole plate in the battery unit (61); The box body (1) has a first through hole (111) penetrating the first side surface, and the spring ejector pin (22) extends from the first through hole (111) to the outside of the box body (1).

3. The fuel cell voltage acquisition assembly according to claim 2, characterized in that: The spring ejector pins (22) are multiple and arranged at intervals, each of the spring ejector pins (22) is provided with the first through hole (111), and each of the spring ejector pins (22) is used to abut and connect with different battery cells (61) in the battery stack (6).

4. The fuel cell voltage acquisition assembly according to claim 1, characterized in that: The second electrical connection portion comprises an electrical connection connector connected to the circuit board (21); The box body (1) has a second through hole (122) penetrating the second side surface, and the electrical connection connector extends from the second through hole (122) to the outside of the box body (1).

5. The fuel cell voltage acquisition assembly according to claim 4, characterized in that: The electrical connection connector is a quick-plug connector (23).

6. The fuel cell voltage acquisition assembly according to claim 1, characterized in that: The box body (1) is provided with a connection hole (101), and the box body (1) can be fixed on an external carrier via a connection piece (8) located in the connection hole (101).

7. The fuel cell voltage acquisition assembly according to claim 6, characterized in that: The connecting hole (101) is an elongated hole, and the connecting member (8) is capable of moving along the length direction of the connecting hole (101).

8. The fuel cell voltage acquisition assembly according to any one of claims 1 to 7, characterized in that: The box body (1) comprises a base (11) and a cover plate (12) which are buckled together, and a receiving cavity for receiving the circuit board (21) is formed between the base (11) and the cover plate (12); The first side surface is a side of the base (11) facing the battery unit (61); The second side surface is a side of the cover plate (12) away from the base (11), or the second side surface is a side where a side portion of the cover plate (12) is located.

9. The fuel cell voltage acquisition assembly according to claim 8, characterized in that: The base (11) and the cover plate (12) are detachably connected.

10. A fuel cell voltage monitoring device, characterized in that: It comprises a clamp (7) capable of being clamped on a fuel cell stack (6), a fuel cell voltage acquisition assembly according to any one of claims 1 to 9 arranged on the clamp (7), and a voltage monitoring device connected to the second electrical connection portion.

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