Single battery piece test clamp and method
By designing a detachable fixture module and clamping module, the problems of adaptation and misalignment of battery cells in the stack environment in the prior art are solved, and efficient and low-cost single-cell cell testing is achieved.
Patent Information
- Application Number
- CN202411474146.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2024-12-31
AI Technical Summary
The existing single-cell test fixtures are difficult to restore the battery cells in the stack working environment and are difficult to adapt to different battery cells for testing. They are costly and have low repeatability, and the battery cells are prone to misalignment during testing and handling.
A single cell test fixture including a clamp module and a clamping module is designed, and the battery cell is pre-clided between the metal connector through the clamping module of the first clamp seat and the second clamping seat, and a flow is set. Field channels and channels are used to simulate the stack environment and can be detached and replaced metal connectors to meet different test needs, reducing costs.
It effectively avoids misalignment of the battery cells during testing and handling, reduces the manufacturing cost of the test fixture, and improves the repeatability and adaptability of the test.
Smart Images
Figure CN119224383A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of solid oxide batteries, and in particular to a single battery sheet testing fixture and method. Background Art
[0002] Solid oxide cell (SOC) is an all-solid-state electrochemical device that converts chemical energy stored in fuel and oxidant into electrical energy in an efficient and environmentally friendly manner at medium and high temperatures. Solid oxide cells are roughly divided into two types: one is cylindrical, in which the electrodes and solid electrolytes are covered around the cylindrical surface, and the other is planar, in which the solid electrolyte and electrodes are made into a planar shape. Compared with cylindrical solid oxide fuel cells, planar solid oxide fuel cells have a higher power density per unit volume, so they have a wider range of application prospects. As the core of the battery stack, the flat cell plays an important role in the performance of the battery stack. The detection of flat cells has a key guiding significance for the preparation of flat cells. At present, the single cell test fixture adopts an integrated all-ceramic structure or an all-metal structure, which is difficult to restore the cell in the working environment of the battery stack and difficult to adapt to different cell tests. It is costly and has low repeatability. In addition, the cell is easily misplaced during testing and handling, which is not conducive to the testing and research of single cells. Summary of the invention The purpose of the present invention is to provide a single cell test fixture and method, which can restore the cell in the working environment of the battery stack, adapt to different cell tests, and effectively avoid the easy dislocation of the cell during testing and transportation, so as to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.
[0003] The technical solutions adopted to solve the above technical problems are: The present invention provides a single cell test fixture, comprising: A clamp module, comprising a first clamp seat, a second clamp seat, a first metal connector and a second metal connector, the first clamp seat and the second clamp seat are arranged opposite to each other, the first metal connector is detachably arranged on a side of the first clamp seat facing the second clamp seat, the second metal connector is detachably arranged on a side of the second clamp seat facing the first clamp seat, a first flow field channel is arranged on a side of the first metal connector facing the second metal connector, a second flow field channel is arranged on a side of the second metal connector facing the first metal connector, the first clamp seat is provided with a first air inlet channel and a first air outlet channel respectively connected to the first flow field channel, and the second clamp seat is provided with a second air inlet channel and a second air outlet channel respectively connected to the second flow field channel; The clamping module is configured to clamp the first clamping seat and the second clamping seat to each other.
[0004] The beneficial effects of the present invention are: When in use, the battery cell to be tested is arranged between the first metal connector and the second metal connector, and the first clamping seat and the second clamping seat are clamped by the clamping module, so that the battery cell is pre-clamped between the first metal connector and the second metal connector, which effectively avoids the battery cell from being easily misplaced during testing and transportation. At this time, one side of the battery cell is fitted with the first flow field channel to form an air flow channel, and the other side of the battery cell is fitted with the second flow field channel to form a hydrogen flow channel. The first air inlet channel, the air flow channel and the first air outlet channel are connected in sequence to form an air flow channel, and the second air inlet channel, the hydrogen flow channel and the second air outlet channel are connected in sequence to form a hydrogen flow channel. During the test, the working environment of the battery cell in the battery stack is restored as much as possible. In addition, the first metal connector is detachably arranged on the first clamp seat, and the second metal connector is detachably arranged on the second clamp seat. The present application can disassemble and replace the first metal connector and the second metal connector. The first metal connector and the second metal connector can be disassembled and replaced according to different test requirements or with the wear and tear of long-term use. The material of the first clamp seat and the second clamp seat can be selected from low-cost insulating materials, and the first metal connector and the second metal connector are distinguished. Compared with the traditional all-ceramic structure and the all-metal structure, the manufacturing cost of the test fixture is reduced.
[0005] As a further improvement of the above technical solution, a first embedding groove is provided on a side surface of the first clamping seat facing the second clamping seat, and the first metal connecting body is embedded in the first embedding groove; A second embedding groove is provided on a side surface of the second clamping seat facing the first clamping seat, and the second metal connecting body is embedded in the second embedding groove.
[0006] As a further improvement of the above technical solution, the first flow field channel is provided with a first flow field inlet and a first flow field outlet respectively penetrating the first metal connector, the first air inlet channel is provided with a first air inlet docking port located in the first embedding groove, the first air outlet channel is provided with a first air outlet docking port located in the first embedding groove, the first air inlet docking port is docked and connected with the first flow field inlet, and the first air outlet docking port is docked and connected with the first flow field outlet; The second flow field channel is provided with a second flow field inlet and a second flow field outlet respectively penetrating the second metal connector, the second air inlet channel is provided with a second air inlet docking port located in the second embedded groove, the second air outlet channel is provided with a second air outlet docking port located in the second embedded groove, the second air inlet docking port is dockingly connected to the second flow field inlet, and the second air outlet docking port is dockingly connected to the second flow field outlet.
[0007] As a further improvement of the above technical solution, the edge of the first embedded groove is provided with a first notch groove extending outward, and the first metal connecting body is provided with a first connecting electrode extending from the first notch groove; The edge of the second embedded groove is provided with a second notch groove extending outward, and the second metal connecting body is provided with a second connecting electrode extending from the second notch groove.
[0008] As a further improvement of the above technical solution, a plurality of positioning pins are provided between the first clamping seat and the second clamping seat, and the first clamping seat and the second clamping seat are respectively inserted into two ends of the positioning pins.
[0009] As a further improvement of the above technical solution, the clamping module includes two clamping frames and at least one clamping mechanism. The first clamping seat and the second clamping seat are clamped between the two clamping frames. At least one clamping mechanism is connected between the two clamping frames so that the two clamping frames clamp the first clamping seat and the second clamping seat.
[0010] As a further improvement of the above technical solution, the clamping mechanism includes a connecting bolt and a connecting nut, and the connecting bolt passes through the two clamping frames and is threadedly connected to the connecting nut.
[0011] As a further improvement of the above technical solution, the clamping mechanism also includes a clamping spring, which is sleeved on the connecting bolt, one end of the clamping spring acts on the connecting nut, and the other end acts on one of the clamping frames.
[0012] As a further improvement of the above technical solution, two clamping modules are provided, and the two clamping modules are clamped on both sides between the first clamping seat and the second clamping seat, and the clamping mechanisms are respectively provided at both ends between the two clamping frames.
[0013] The present invention also provides a single cell testing method, which is applicable to the single cell testing fixture. The single cell testing method includes: Placing the battery cell to be tested between the first metal connector and the second metal connector, and making the two side surfaces of the battery cell to be tested correspond to the first flow field channel and the second flow field channel respectively; Clamping the first clamping seat and the second clamping seat together to pre-clamp the battery cell to be tested between the first metal connector and the second metal connector; Pressurizing between the first clamping seat and the second clamping seat according to a preset test pressure by a pressurizing device; introducing air and hydrogen into the first air inlet passage and the second air inlet passage; Discharge information between the first metal connecting bodies is detected.
[0014] Other features and advantages of the present invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein: The present invention will be further described below in conjunction with the accompanying drawings and embodiments; Figure 1 This is a structural schematic diagram of an embodiment of a single cell test fixture provided by the present invention; Figure 2 This is an exploded view of an embodiment of a single cell test fixture provided by the present invention; Figure 3 is a cross-sectional view of an embodiment of a single cell test fixture provided by the present invention; Figure 4 is a structural schematic diagram of an embodiment of the second metal connector provided by the present invention; Figure 5 This is a structural schematic diagram of an embodiment of the second clamping base provided by the present invention; Figure 6 This is a schematic diagram of the process steps of an embodiment of the single cell testing method provided by the present invention; Figure Number: The fixture module 100; the first clamping seat 110; the first air inlet channel 111; the first air inlet interface 1111; the first air outlet channel 112; the first air outlet interface 1121; the first embedding groove 113; the first notch groove 1131; the circular groove 114; the second clamping seat 120; the second air inlet channel 121; the second air inlet interface 1211; the second air outlet channel 122; the second air outlet interface 1221; the second embedding groove 123; the first metal connector 130; the first flow field channel 131; the second notch groove 1231; the first flow field inlet 1311; the first flow field outlet 1312; the first connecting electrode 132; the second metal connector 140; the second flow field channel 141; the linear guide groove 1411; the second flow field inlet 1412; the second flow field outlet 1413; the inlet distribution groove 1414; the outlet confluence groove 1415; the second connecting electrode 142; Clamping module 200; clamping frame 210; connecting bolt 220; connecting nut 230; clamping spring 240; washer 250; Positioning pin 300; Ventilation pipe 400; Battery cell 500. DETAILED DESCRIPTION
[0016] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.
[0017] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0018] In the description of the present invention, if there are words such as "several", it means one or more, "more" means more than two, greater than, less than, exceed, etc. are understood as not including the number, and above, below, within, etc. are understood as including the number.
[0019] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0020] Solid oxide batteries are roughly divided into two types: one is a cylindrical type, in which the electrodes and electrolytes are covered around the cylindrical surface, and the other is a planar type, in which the electrolyte and electrodes are made into a flat shape. Compared with cylindrical solid oxide fuel cells, planar solid oxide fuel cells have a higher power density per unit volume, so they have a wider range of application prospects. As the core of the battery stack, the flat battery cell plays an important role in the performance of the battery stack. The detection of flat batteries has a key guiding significance for the preparation of flat batteries. At present, single-cell test fixtures all use an integrated all-ceramic structure or an all-metal structure, which makes it difficult to restore the battery cell 500 in the working environment of the battery stack, and it is difficult to adapt to different battery cell 500 tests. The cost is high and the repeatability is low. In addition, the battery cell 500 is easy to be misplaced during testing and handling, which is not conducive to the testing and research of single-cell batteries.
[0021] Therefore, an embodiment of the present invention proposes a single cell test fixture that can restore the cell 500 in the working environment of the battery stack and adapt to different cell 500 tests, effectively avoiding the cell 500 from being easily misplaced during testing and transportation.
[0022] like Figure 1 and Figure 2 As shown, the single cell test fixture of the embodiment of the present invention includes a fixture module 100 and a clamping module 200 .
[0023] like Figure 1 As shown, the clamp module 100 of the embodiment of the present invention includes a first clamp seat 110, a second clamp seat 120, a first metal connector 130 and a second metal connector 140. The first clamp seat 110 and the second clamp seat 120 are arranged relative to each other. In this embodiment, the first clamp seat 110 and the second clamp seat 120 are arranged relative to each other up and down as an example. In some other embodiments, the first clamp seat 110 and the second clamp seat 120 can be arranged relative to each other along other directions.
[0024] Furthermore, the first clamping seat 110 and the second clamping seat 120 are ceramic components respectively, and are made of ceramic materials to achieve the function of insulation.
[0025] The first metal connector 130 and the second metal connector 140 are respectively made of metal materials of conventional battery stack connecting plates, such as Figure 3 As shown, the first metal connector 130 is detachably mounted on the bottom surface of the first clamping seat 110, and the second metal connector 140 is detachably mounted on the top surface of the second clamping seat 120. The bottom surface of the first metal connector 130 is provided with a first flow field channel 131, and the top surface of the second metal connector 140 is provided with a second flow field channel 141. The shapes of the first flow field channel 131 and the second flow field channel 141 are determined according to different battery stacks, such as Figure 4 As shown, the second flow field channel 141 of this embodiment is a plurality of straight guide grooves 1411 arranged side by side, and the straight guide grooves 1411 are extended left and right. The structure of the first flow field channel 131 is the same as that of the second flow field channel 141. In some other embodiments, the first flow field channel 131 and the second flow field channel 141 are a plurality of curved guide grooves arranged side by side.
[0026] like Figure 3 As shown, the first clamp seat 110 is provided with a first air inlet channel 111 and a first air outlet channel 112, and the first air inlet channel 111 and the first air outlet channel 112 are respectively connected to the inlet and outlet of the first flow field channel 131, and the second clamp seat 120 is provided with a second air inlet channel 121 and a second air outlet channel 122, and the second air inlet channel 121 and the second air outlet channel 122 are respectively connected to the inlet and outlet of the second flow field channel 141.
[0027] The clamping module 200 is configured to clamp the first clamping seat 110 and the second clamping seat 120 to each other.
[0028] When in use, the battery cell 500 to be tested is arranged between the first metal connector 130 and the first metal connector 130, and the first clamping seat 110 and the second clamping seat 120 are clamped by the clamping module 200, so that the battery cell 500 is pre-clamped between the first metal connector 130 and the second metal connector 140, which effectively avoids the battery cell 500 from being easily misplaced during the test and transportation process. At this time, one side of the battery cell 500 is attached to the first flow field groove 131 to form an air flow channel, and the other side of the battery cell 500 is attached to the second flow field groove 141 to form a hydrogen flow channel. The first air inlet channel 111, the air flow channel and the first air outlet channel 112 are connected in sequence to form an air flow path, and the second air inlet channel 121, the hydrogen flow channel and the second air outlet channel 122 are connected in sequence to form a hydrogen flow channel. The two metal connectors 130 and 140 are connected to form a hydrogen flow path, and the battery cell 500 is restored to the working environment of the battery stack as much as possible during the test. In addition, the first metal connector 130 is detachably arranged on the first clamp seat 110, and the second metal connector 140 is detachably arranged on the second clamp seat 120. The present application can disassemble and replace the first metal connector 130 and the second metal connector 140. The first metal connector 130 and the second metal connector 140 can be disassembled and replaced according to different test requirements or with wear and tear due to long-term use. The material of the first clamp seat 110 and the second clamp seat 120 can be selected from low-cost ceramic materials, and the first metal connector 130 and the second metal connector 140 are distinguished. Compared with the traditional all-ceramic structure and the all-metal structure, the manufacturing cost of the test fixture is reduced.
[0029] Furthermore, if Figure 3 As shown, the bottom surface of the first clamping seat 110 of the embodiment of the present invention is provided with a first embedding groove 113, the shape and size of the first embedding groove 113 match the first metal connector 130, and the first metal connector 130 is embedded in the first embedding groove 113 to achieve the positioning installation of the first metal connector 130, as shown in FIG. Figure 5 As shown, the top surface of the second clamp seat 120 is provided with a second embedding groove 123, and the second metal connector 140 is embedded in the second embedding groove 123 to achieve the positioning installation of the second metal connector 140. The second clamp seat 120 of this embodiment is similar to the first clamp seat 110 in structure and is symmetrically arranged up and down.
[0030] like Figure 3As shown, the first flow field channel 131 of the present embodiment is provided with a first flow field inlet 1311 and a first flow field outlet 1312 which respectively penetrate the top and bottom surfaces of the first metal connector 130, and the first air inlet channel 111 is provided with a first air inlet docking port 1111 located in the first embedding groove 113, and the first air outlet channel 112 is provided with a first air outlet docking port 1121 located in the first embedding groove 113. After the first metal connector 130 is embedded in the first embedding groove 113, the first air inlet docking port 1111 is connected to the first flow field inlet 1311, and the first air outlet docking port 1121 is connected to the first flow field outlet 1312. In the embodiment of the present invention, glass sealing is used between the first air inlet docking port 1111 and the first flow field inlet 1311, and between the first air outlet docking port 1121 and the first flow field outlet 1312.
[0031] like Figure 3 As shown, the second flow field channel 141 is provided with a second flow field inlet 1412 and a second flow field outlet 1413 that respectively penetrate the top surface and the bottom surface of the second metal connector 140. Figure 5 As shown, the second air inlet channel 121 is provided with a second air inlet docking port 1211 located in the second embedding groove 123, and the second air outlet channel 122 is provided with a second air outlet docking port 1221 located in the second embedding groove 123. After the second metal connector 140 is embedded in the second embedding groove 123, the second air inlet docking port 1211 is docked and connected with the second flow field inlet 1412, and the second air outlet docking port 1221 is docked and connected with the second flow field outlet 1413. In the embodiment of the present invention, glass sealing is respectively adopted between the second air inlet docking port 1211 and the second flow field inlet 1412, and between the second air outlet docking port 1221 and the second flow field outlet 1413.
[0032] like Figure 4 As shown, the left and right sides of the second flow field channel 141 are respectively provided with an inlet distribution groove 1414 and an outlet confluence groove 1415, the second flow field inlet 1412 is provided at the middle position of the inlet distribution groove 1414, and the second flow field outlet 1413 is provided at the middle position of the outlet confluence groove 1415, the gas is evenly distributed to the linear guide groove 1411 through the inlet distribution groove 1414, and the gas passing through the plurality of linear guide grooves 1411 is confluenced to the second flow field outlet 1413 through the outlet confluence groove 1415. The first flow field channel 131 is also provided with an inlet distribution groove 1414 and an outlet confluence groove 1415.
[0033] The first air inlet channel 111 , the first air outlet channel 112 , the second air inlet channel 121 and the second air outlet channel 122 of the present embodiment are all externally connected to a ventilation pipe 400 , and are connected to the air supply device and the air collection device through the ventilation pipe 400 .
[0034] In the embodiment of the present invention, the edge of the first embedding groove 113 is provided with a first notch groove 1131 extending outward, the first metal connector 130 is provided with a first connection electrode 132 extending from the first notch groove 1131 , and the external testing equipment is electrically connected to the first connection electrode 132 .
[0035] The edge of the second embedding groove 123 is provided with a second notch groove 1231 extending outward, and the second metal connector 140 is provided with a second connecting electrode 142 extending from the second notch groove 1231. The external test equipment is connected to the second connecting electrode 142 to realize the collection of the test signal of the battery stack unit.
[0036] In order to avoid misalignment between the first clamp seat 110 and the second clamp seat 120, a plurality of positioning pins 300 are provided between the first clamp seat 110 and the second clamp seat 120, and the two ends of the positioning pins 300 are respectively inserted into the first clamp seat 110 and the second clamp seat 120. In this embodiment, four positioning pins 300 are provided, and the four positioning pins 300 are respectively arranged at the four corners between the first clamp seat and the second clamp seat 120.
[0037] like Figure 1 and Figure 2 As shown, the clamping module 200 of the embodiment of the present invention includes two clamping frames 210 and at least one clamping mechanism. The first clamping seat 110 and the second clamping seat 120 are clamped between the two clamping frames 210. The clamping mechanism is connected between the two clamping frames 210 so that the two clamping frames 210 clamp the first clamping seat 110 and the second clamping seat 120 up and down, and clamp the first metal connector 130 and the first metal connector 130 to achieve pre-tightening of the battery cell 500.
[0038] The clamping mechanism includes a connecting bolt 220 and a connecting nut 230 . The connecting bolt 220 passes through the two clamping frames 210 and is threadedly connected to the connecting nut 230 . The preload force is adjusted by the threaded cooperation between the connecting bolt 220 and the connecting nut 230 .
[0039] Furthermore, the clamping mechanism also includes a clamping spring 240, which is sleeved on the connecting bolt 220. One end of the clamping spring 240 acts on the connecting nut 230, and the other end acts on one of the clamping frames 210. The clamping spring 240 is used to increase the pre-clamping elastic force of the two clamping frames 210 to achieve elastic clamping, and the expansion and contraction of the clamping spring 240 can be adjusted by screwing the connecting nut 230 to adjust the size of the elastic force.
[0040] In this embodiment, washers 250 are disposed at both upper and lower ends of the clamping spring 240 to improve the stability of the abutment.
[0041] In the embodiment of the present invention, two clamping modules 200 are provided, and the two clamping modules 200 are clamped on the left and right sides between the first clamping seat 110 and the second clamping seat 120. Clamping mechanisms are respectively provided at the front and rear ends between the two clamping frames 210, so that the stability of clamping the first clamping seat 110 and the second clamping seat 120 can be improved, and a pressurized action surface can be formed in the middle between the first clamping seat 110 and the second clamping seat 120.
[0042] In this embodiment, a circular groove 114 is provided on the top surface of the first clamping seat 110 to place the pressure rod during the test process.
[0043] like Figure 6 As shown, the embodiment of the present invention also provides a single cell testing method, which includes the following steps: Step S100: placing the battery cell 500 to be tested between the first metal connector 130 and the second metal connector 140, and making the two side surfaces of the battery cell 500 to be tested correspond to the first flow field channel 131 and the second flow field channel 141 respectively; Step S200: Clamp the first clamping seat 110 and the second clamping seat 120 to each other, so as to pre-clamp the battery cell 500 to be tested between the first metal connector 130 and the second metal connector 140; Step S300: applying pressure between the first clamping seat 110 and the second clamping seat 120 according to a preset test pressure by a pressurizing device; Step S400: introducing air and hydrogen into the first air inlet passage 111 and the second air inlet passage 121 Step S500 : detecting discharge information between the first metal interconnectors 130 and the first metal interconnectors 130 .
[0044] In step S200, two clamping mechanisms are used to press the front and rear ends of the two clamping frames 210 to clamp the first clamping seat 110 and the second clamping seat 120 to each other. Specifically, according to the pre-tightening requirement, the connecting nut 230 is screwed to clamp the first clamping seat 110 and the second clamping seat 120 by the elastic force of the clamping spring 240; At this time, the top surface of the battery cell 500 is attached to the first flow field groove 131 to form an air flow channel, and the bottom surface of the battery cell 500 is attached to the second flow field groove 141 to form a hydrogen flow channel. The first air inlet channel 111, the air flow channel and the first air outlet channel 112 are connected in sequence to form an air flow path, and the second air inlet channel 121, the hydrogen flow channel and the second air outlet channel 122 are connected in sequence to form a hydrogen flow path.
[0045] In step S300 , the test fixture is placed in a pressurizing device, and the test fixture is pressurized by bringing an upper mold and a lower mold of the pressurizing device closer to each other.
[0046] The present invention adopts a repeatable and detachable test fixture to restore the battery cell 500 in the working environment of the battery stack as much as possible during the test process. The metal connector is replaceable, which reduces the cost of the single battery cell test fixture compared to the traditional all-ceramic structure and all-metal structure. The positioning pin 300 and the clamping frame 210 can fix the position of the single battery to each other during the test and transportation process, and will not be misaligned, thereby reducing human factors.
[0047] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.
Claims
1. A single cell test fixture, characterized in that: include: A clamp module, comprising a first clamp seat, a second clamp seat, a first metal connector and a second metal connector, the first clamp seat and the second clamp seat are arranged opposite to each other, the first metal connector is detachably arranged on a side of the first clamp seat facing the second clamp seat, the second metal connector is detachably arranged on a side of the second clamp seat facing the first clamp seat, a first flow field channel is arranged on a side of the first metal connector facing the second metal connector, a second flow field channel is arranged on a side of the second metal connector facing the first metal connector, the first clamp seat is provided with a first air inlet channel and a first air outlet channel respectively connected to the first flow field channel, and the second clamp seat is provided with a second air inlet channel and a second air outlet channel respectively connected to the second flow field channel; The clamping module is configured to clamp the first clamping seat and the second clamping seat to each other.
2. The single cell test fixture according to claim 1, characterized in that: A first embedding groove is provided on a side surface of the first clamping seat facing the second clamping seat, and the first metal connecting body is embedded in the first embedding groove; A second embedding groove is provided on a side surface of the second clamping seat facing the first clamping seat, and the second metal connecting body is embedded in the second embedding groove.
3. The single cell test fixture according to claim 2, characterized in that: The first flow field channel is provided with a first flow field inlet and a first flow field outlet respectively penetrating the first metal connector, the first air inlet channel is provided with a first air inlet docking port located in the first embedding groove, the first air outlet channel is provided with a first air outlet docking port located in the first embedding groove, the first air inlet docking port is connected to the first flow field inlet by docking, and the first air outlet docking port is connected to the first flow field outlet by docking; The second flow field channel is provided with a second flow field inlet and a second flow field outlet respectively penetrating the second metal connector, the second air inlet channel is provided with a second air inlet docking port located in the second embedded groove, the second air outlet channel is provided with a second air outlet docking port located in the second embedded groove, the second air inlet docking port is dockingly connected to the second flow field inlet, and the second air outlet docking port is dockingly connected to the second flow field outlet.
4. The single cell test fixture according to claim 2, characterized in that: The edge of the first embedded groove is provided with a first notch groove extending outward, and the first metal connecting body is provided with a first connecting electrode extending from the first notch groove; The edge of the second embedded groove is provided with a second notch groove extending outward, and the second metal connecting body is provided with a second connecting electrode extending from the second notch groove.
5. The single cell test fixture according to claim 1, characterized in that: A plurality of positioning pins are arranged between the first clamping seat and the second clamping seat, and the first clamping seat and the second clamping seat are respectively inserted into two ends of the positioning pins.
6. The single cell test fixture according to claim 1, characterized in that: The clamping module includes two clamping frames and at least one clamping mechanism. The first clamping seat and the second clamping seat are clamped between the two clamping frames. At least one clamping mechanism is connected between the two clamping frames so that the two clamping frames clamp the first clamping seat and the second clamping seat.
7. The single cell test fixture according to claim 6, characterized in that: The clamping mechanism comprises a connecting bolt and a connecting nut. The connecting bolt passes through the two clamping frames and is threadedly connected with the connecting nut.
8. The single cell test fixture according to claim 7, characterized in that: The clamping mechanism also includes a clamping spring, which is sleeved on the connecting bolt, one end of the clamping spring acts on the connecting nut, and the other end acts on one of the clamping frames.
9. The single cell test fixture according to any one of claims 6 to 8, characterized in that: The clamping modules are provided with two, and the two clamping modules are clamped at two sides between the first clamping seat and the second clamping seat, and the clamping mechanisms are respectively provided at both ends between the two clamping frames.
10. A single cell testing method, characterized in that: The single cell testing fixture according to any one of claims 1 to 9 is applicable, and the single cell testing method comprises: Placing the battery cell to be tested between the first metal connector and the second metal connector, and making the two side surfaces of the battery cell to be tested correspond to the first flow field channel and the second flow field channel respectively; Clamping the first clamping seat and the second clamping seat together to pre-clamp the battery cell to be tested between the first metal connector and the second metal connector; Pressurizing between the first clamping seat and the second clamping seat according to a preset test pressure by a pressurizing device; introducing air and hydrogen into the first air inlet passage and the second air inlet passage; Discharge information between the first metal connecting bodies is detected.