Electrical connection structure for voltage inspection of metal single battery

Abstract

The utility model relates to the technical field of fuel cells, in particular to an electrical connection structure for voltage inspection of a metal single cell. Comprising an electrical connection device, the electrical connection device comprises a plugging main body and a plurality of inspection lines, the plugging main body comprises a comb tooth structure, the comb tooth structure comprises a plurality of comb tooth units arranged at intervals, and each comb tooth unit comprises an internal comb tooth structure, an inspection line limiting groove and an external comb tooth structure used for separating single battery inspection pieces one by one. The internal comb tooth structure and the external comb tooth structure are both provided with slopes, the inclination angle alpha of the slopes is 10-30 degrees, and the end of the external comb tooth structure extends out of the side face of the plug-in body. And one ends of a plurality of inspection lines penetrate through the plugging main body at intervals and then are fixed in the inspection line limiting grooves. The connecting structure provided by the utility model has a combing and guiding function, so that pile short circuit caused by extrusion due to improper installation of the two inspection sheets of the adjacent single batteries can be effectively prevented, and the safety risk of pile burning due to short circuit is reduced.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell technology, specifically to an electrical connection structure for voltage monitoring of metal single cells. Background Technology

[0002] In the field of fuel cell technology, the voltage difference between two adjacent single cells is called the single-cell voltage. Single-cell voltage is a crucial state parameter for judging the overall performance of a fuel cell stack. The magnitude, fluctuation, and consistency of the stack voltage reflect the health status of the cells, making voltage control and fault diagnosis indispensable for fuel cells. To monitor the operating status of the cells, each single cell is connected to a voltage monitoring unit, which transmits the single cell's voltage value in real time. The connection structure for single-cell voltage monitoring is one of the key components of a fuel cell; its correct installation and reliable use largely determine electrical safety and the accuracy of voltage acquisition, significantly impacting the overall fault diagnosis and performance output of the fuel cell. Current technologies often fail to effectively prevent errors during the installation of single-cell voltage monitoring connection structures, leading to deformation of the monitoring plates and causing adjacent single cell monitoring plates to be squeezed together, potentially causing a short circuit in the stack. Therefore, ensuring that adjacent monitoring plates do not squeeze together and that the monitoring lines make good contact with the single-cell monitoring plates is a technical problem that needs to be solved. Utility Model Content

[0003] The problem to be solved is to provide an electrical connection structure for voltage inspection of metal single cells, ensuring that two adjacent inspection plates do not squeeze each other, that the inspection line makes good contact with the single cell inspection plate, and that adjacent inspection plates are not squeezed together.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an electrical connection structure for voltage inspection of metal single batteries, comprising an electrical connection device, the electrical connection device comprising a plug-in body and several inspection lines, the plug-in body comprising a comb tooth structure, the comb tooth structure comprising multiple comb tooth units arranged at intervals, the comb tooth unit comprising an inner comb tooth structure, an inspection line limiting groove and an outer comb tooth structure for separating the single battery inspection pieces piece by piece, both the inner and outer comb tooth structures having a slope, the inclination angle α of the slope being 10° to 30°, the end of the outer comb tooth structure extending out of the side of the plug-in body; one end of several inspection lines passing through the plug-in body at intervals and then fixed in the inspection line limiting groove.

[0005] Preferably, the spacing between adjacent comb tooth units is 1mm to 1.5mm, which is suitable for the thickness of a single battery inspection plate.

[0006] Preferably, the depth of the inspection line limiting groove is 0.5 to 1.0 mm.

[0007] Preferably, the plug-in body is further provided with a snap-fit ​​part, which includes a snap-fit ​​end.

[0008] Preferably, the number of inspection lines is 8 to 10, arranged in a parallel modular layout.

[0009] Preferably, both the upper and lower surfaces of the internal comb structure and the external comb structure have slopes, and the slopes of the upper and lower surfaces have the same inclination angle.

[0010] Compared with the prior art, this utility model provides an electrical connection structure for voltage inspection of metal single cells, which has the following advantages: the inclined guide design of the inner and outer comb structure ensures that adjacent single cell inspection pieces are separated and accurately positioned, avoiding misconnection, multiple connection or compression, and significantly reducing the risk of short circuit in the fuel cell stack; the inspection line limiting groove makes the inspection line and the single cell inspection piece form a stable electrical connection, reducing voltage acquisition errors caused by poor contact; the single plug-in body integrates several inspection lines, which improves the assembly efficiency several times, and is suitable for large-scale fuel cell production; Attached Figure Description

[0011] Figure 1 The figure shown is an isometric view of the electrical connection device of this utility model;

[0012] Figure 2 The diagram shown is a schematic diagram of the comb tooth structure involved in this utility model;

[0013] Figure 3 The image shown is a side view of the adjacent external comb tooth structure involved in this utility model;

[0014] Figure 4 The image shown is a top view of the electrical connection device of this utility model;

[0015] Figure 5 The diagram shown is a schematic diagram of the electrical connection device of this utility model in use;

[0016] Explanation of reference numerals in the attached drawings: 1. Battery stack; 2. Single cell; 21. Single cell inspection plate; 22. Single cell inspection groove; 3. Electrical connection device; 31. Plug-in body; 32. Inspection line; 33. Snap-in part; 34. Snap-in end; 35. Comb structure; 4. Comb unit; 41. Internal comb structure; 42. Inspection line limiting groove; 43. External comb structure. Detailed Implementation

[0017] The technical solutions of the present utility model will now be described with reference to the accompanying drawings in the embodiments of the present utility model:

[0018] To address the problems described in the background art, this utility model provides an electrical connection structure for voltage inspection of metal single-cell batteries, including an electrical connection device 3. The electrical connection device 3 includes a plug-in body 31 and several inspection lines 32, preferably 8 to 10 lines arranged in a parallel modular configuration. The plug-in body 31 includes a comb structure 35, which comprises multiple spaced comb units 4. Each comb unit 4 includes an inner comb structure 41, inspection line limiting grooves 42, and an outer comb structure 43 for separating the single-cell inspection pieces 21 piece by piece. Both the inner comb structure 41 and the outer comb structure 43 have slopes, such as... Figures 2-3 The slope shown has an inclination angle of α, which ranges from 10° to 30°. The external comb structure 43 and the internal comb structure 41 guide the single battery inspection piece 21 to be embedded into the inspection line limiting groove 42 through the slope, and form a stable electrical connection with the inspection line 32. The upper and lower surfaces of the internal comb structure 41 and the external comb structure 43 are both sloped, and the inclination angles of the upper and lower surfaces are the same to facilitate the insertion of adjacent single battery inspection pieces 21. The end of the external comb structure 43 extends out of the side of the insertion body 31. One end of several inspection lines 32 passes through the insertion body 31 at intervals and is fixed in the inspection line limiting groove 42.

[0019] Figure 2 The depth of the inspection line limiting groove 42 is d, and the range of d can be 0.5 to 1.0 mm. The width of the inspection line limiting groove 42 matches the thickness tolerance of the single battery inspection piece 21, and the thickness tolerance range of the single battery inspection piece 21 is ±0.05 mm. Figure 3 The figure shown is a side view of the adjacent external comb tooth structure involved in this utility model. The minimum horizontal spacing between adjacent comb tooth units 4 is h, which is used to adapt to the thickness of the single battery inspection piece 21. The maximum spacing at the slope of the upper and lower external comb tooth structure 43 is H, which facilitates the insertion of the single battery inspection piece 21. Generally, the range of h to H is selected from 1mm to 1.5mm.

[0020] The plug-in body 31 is also provided with a snap-fit ​​part 33, which includes a pressing end and a snap-fit ​​end 34. The snap-fit ​​part 33 is located at one end of the plug-in body 31. The snap-fit ​​end 34 is adapted to the single battery inspection groove 22. The cross-sectional shape of the snap-fit ​​end 34 is an inverted trapezoid, which is complementary to the geometry of the single battery inspection groove 22. The pressing end of the snap-fit ​​part 33 is provided with an elastic buffer layer, and the pressing stroke is 2-4mm.

[0021] The existing electrical connection structure for single-cell voltage inspection lacks an internal comb structure 41 and an external comb structure 43 in the plug-in body 31. This makes it impossible to confirm during installation whether the single-cell inspection piece 21 inside the plug-in body 31 is correctly connected to the inspection line 32. This leads to technical problems such as deformation of the single-cell inspection piece 21, poor contact between the inspection line 32 and the single-cell inspection piece 21, and two adjacent single-cell inspection pieces 21 being squeezed together. These issues can cause short-circuit faults in the fuel cell stack voltage, potentially posing a significant safety risk during fuel cell burn-in testing. The present invention can effectively solve the above problems. Specifically, the electrical connection device 3 shown in the figure includes an inspection line 32 and a plug-in body 31. The inspection line 32 is used to connect to the single battery inspection piece 21. The inspection line 32 passes through the plug-in body 31. Each inspection line 32 is fixed between two adjacent comb tooth units 4 on the plug-in body 31. The plug-in body 31 is used for detachable connection with the single battery inspection piece 21. The inspection line 32 passes through the plug-in body 31 and is used for electrical connection after contact with the single battery inspection piece. For multiple adjacent single battery inspection pieces 21, the external comb tooth structure 43 on the plug-in body 31 can be used for assembly and combing of each piece. The internal comb tooth structure 41 can guide the single battery inspection piece 21 to be connected and fastened to the inspection line 32.

[0022] Specifically, the electrical connection device 3 is a highly integrated structure containing several inspection lines 32 arranged in parallel. The plug-in body 31 can be fixed to a single battery. The inspection lines 32 contact the single battery inspection plate 21 to form an electrical signal connection, thereby acquiring the single battery voltage signal. Optionally, the number of inspection lines 32 can be set to 8 to 10 based on the plug-in body 31. That is, after one plug-in body 31 completes its positioning and plugging, 8 to 10 inspection lines 32 can be connected, increasing assembly efficiency by 8 to 10 times. By modularizing the inspection lines 32, several inspection lines 32 are integrated on a single plug-in body 31. During assembly, the plug-in bodies 31 are close to each other, achieving rapid assembly.

[0023] The comb tooth unit 4 on the insertion body 31 extends linearly from the inside of the insertion body 31 to the outside, and each guide comb tooth structure adopts the same slope design. During assembly, after the external comb tooth structure 43 makes contact with the single battery inspection piece 21, observe and confirm whether the external comb tooth effectively distinguishes the single battery inspection pieces one after another, ensuring no misconnection or multiple connections. Then, press the insertion body 31 firmly so that each comb tooth unit 4 inside the insertion body 31 is separated by a single battery inspection piece 21. The slope guide on the comb tooth can guide the single battery inspection piece 21 to be inserted into the inspection line limiting groove 42, thereby achieving accurate connection between the single battery inspection piece 21 and the inspection line 32. This ensures that during the assembly process, the inspection line 32 can be connected one-to-one with the single battery inspection piece 21.

[0024] One end of the connector body 31 with the comb-like structure 35 can contact the single battery 2, which is arranged vertically. After the inspection line limiting groove 42 is fixed with the single battery inspection piece 21, the inspection line 32 can make contact with the single battery inspection piece 21 to form a stable electrical signal connection. The comb-like structure 35 on the connector body 31 is used to guide and distinguish multiple single battery inspection pieces 21, ensuring that each adjacent single battery inspection piece 21 can be effectively separated. After the single battery inspection pieces 21 are separated by the comb-like structure 35, they are guided along the slope of the comb-like structure into the inspection line limiting groove 42. The connector body 31 has multiple inspection line limiting grooves 42, which are used to limit and fix the single battery inspection pieces 21. The snap-fit ​​part 33 is connected above the comb tooth structure 35. The snap-fit ​​part 33 includes a connected pressing end and a snap-fit ​​end 34. The snap-fit ​​end 34 is used to snap into the single battery inspection groove 22.

[0025] like Figure 5 The stack 1 shown includes several individual cells 2; each individual cell 2 is provided with an individual cell inspection plate 21, and an individual cell inspection groove 22 is provided on one side of the individual cell inspection plate 21. When using this device, first position the plug-in body, align the snap-fit ​​end 34 of the plug-in body 31 with the single-battery inspection groove 22, and gently press the pressing end of the snap-fit ​​part 33 until the snap-fit ​​end 34 is fully embedded in the groove; then comb the inspection pieces, inserting multiple single-battery inspection pieces 21 sequentially into the gaps of the external comb structure 43 of the plug-in body 31, ensuring that each single-battery inspection piece 21 is separated by the external comb structure 43; then guide and fix it, pressing the single-battery inspection piece 21 along the slope direction of the internal comb structure 41, so that it slides into the inspection line limiting groove 42, until the inspection line 32 and the contact point of the single-battery inspection piece 21 are completely in contact; finally, check the connection, observe whether the external comb structure 43 separates the single-battery inspection pieces 21, and after confirming that there is no misconnection, press the plug-in body 31 again to ensure a firm snap-fit. It should be noted that: repeating the above steps to install multiple plug-in bodies 31 side by side to achieve module expansion can realize rapid batch connection.

[0026] This invention provides an electrical connection structure for voltage monitoring of metal single-cell batteries. Through the internal comb structure 41, external comb structure 43, and monitoring line limiting groove 42 of the insertion body 31, precise separation and fixation of the single-cell monitoring pieces 21 are achieved. The inclined guide design α of the comb unit 4 (10°–30°) and the layout of the monitoring line 32 effectively prevent short circuits caused by the squeezing of adjacent single-cell monitoring pieces 21 and significantly improve assembly efficiency. The elastic buffer and groove adaptation design of the snap-fit ​​part 33 further ensure connection stability. This structure solves the problems of poor contact, assembly misalignment, and high safety risks in the prior art, and is suitable for voltage monitoring systems of fuel cell stacks.

[0027] The above embodiments are merely some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. An electrical connection structure for voltage inspection of a metal single cell, comprising an electrical connection device (3), the electrical connection device (3) comprising a plug-in body (31) and a plurality of inspection lines (32), characterized in that: The plug-in body (31) includes a comb structure (35), the comb structure (35) includes multiple comb units (4) arranged at intervals, the comb unit (4) includes an inner comb structure (41), an inspection line limiting groove (42) and an outer comb structure (43) for separating the single battery inspection pieces (21) piece by piece. Both the inner comb structure (41) and the outer comb structure (43) have slopes, the slope angle α is 10° to 30°, and the end of the outer comb structure (43) extends out of the side of the plug-in body (31); one end of several inspection lines (32) passes through the plug-in body (31) at intervals and is fixed in the inspection line limiting groove (42).

2. The electrical connection structure for voltage monitoring of a metal single cell according to claim 1, characterized in that: The spacing between adjacent comb units (4) is 1mm to 1.5mm, which is suitable for the thickness of the single battery inspection plate (21).

3. The electrical connection structure for voltage monitoring of a metal single cell according to claim 2, characterized in that: The depth of the inspection line limiting groove (42) is 0.5 to 1.0 mm.

4. The electrical connection structure for voltage monitoring of a metal single cell according to claim 1, characterized in that: The plug-in body (31) is also provided with a snap-fit ​​part (33), which includes a snap-fit ​​end (34).

5. The electrical connection structure for voltage monitoring of a metal single cell according to claim 1, characterized in that: The number of inspection lines (32) is 8 to 10, arranged in a parallel modular layout.

6. The electrical connection structure for voltage monitoring of a metal single cell according to claim 1, characterized in that: The upper and lower surfaces of the internal comb structure (41) and the external comb structure (43) are both sloped, and the slopes of the upper and lower surfaces have the same inclination angle.

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