An in-situ battery testing auxiliary device and an in-situ battery testing system

Abstract

The present invention relates to the technical field of in-situ battery testing, and discloses an in-situ battery testing auxiliary device and an in-situ battery testing system. The in-situ battery testing auxiliary device includes an elastic member and a housing. An opening is provided on the right side of the housing, and a cover body is detachably connected to the opening. Inside the housing, a first semiconductor refrigeration chip, a battery under test, and a second semiconductor refrigeration chip are sequentially arranged from left to right; the elastic member enables the first semiconductor refrigeration chip, the battery under test, and the second semiconductor refrigeration chip to be in contact with each other in sequence. The heat of the first semiconductor refrigeration chip and the second semiconductor refrigeration chip is conducted to both poles of the battery under test, and a cryogenic environment below -25 °C can be provided for the battery under test; light-transmitting holes are coaxially provided on the left side wall of the housing, the first semiconductor refrigeration chip, the second semiconductor refrigeration chip, the elastic member, and the cover body, and the axes of the light-transmitting holes are all arranged in the middle of the battery under test; during use, by aligning the light-transmitting holes with the optical path of the spectral tester, the in-situ testing of the battery under test can be carried out.

Description

Technical Field

[0001] The present invention relates to the technical field of in-situ battery testing, and particularly to an in-situ battery testing auxiliary device and an in-situ battery testing system. Background Art

[0002] With the increasing global energy demand and the rapid consumption of fossil fuels, the development of sustainable energy and corresponding electrochemical energy storage or conversion technologies has developed rapidly in recent years. Among the core components of energy conversion and storage technologies such as secondary metal batteries and supercapacitors, the electrolyte and electrode materials of the battery and their interfacial structure are the key steps affecting the overall performance of the battery, and at the same time are important entry points for technological improvement and innovation.

[0003] Currently, for the structural evolution of electrolyte and electrode materials during charge and discharge, a spectroscopic test instrument is required. During the test, the battery to be tested is placed between the light source and the detector of the spectroscopic tester through an in-situ battery testing auxiliary device. The incident light emitted by the light source is converted into outgoing light after passing through the electrode or electrolyte of the battery, and the outgoing light is irradiated onto the detector. By analyzing the characteristics of the outgoing light, the analysis of the structural evolution of the electrolyte and electrode materials during charge and discharge is realized.

[0004] The Chinese invention patent with the application publication number CN113008886A discloses a device suitable for in-situ observation of lithium batteries at high and low temperatures. By setting a copper tube in the in-situ battery testing auxiliary device and introducing a heat exchange medium into the copper tube, an ambient temperature in the range of -25°C to 50°C is provided for the battery to be tested. However, it cannot provide an ultra-low temperature environment below -25°C for the battery to be tested. Summary of the Invention

[0005] The technical problem to be solved by the present invention is that the existing in-situ battery testing auxiliary device cannot provide an ultra-low temperature environment below -25°C for the battery to be tested.

[0006] To solve the above technical problem, the present invention provides an in-situ battery testing auxiliary device, including an elastic member and a housing. An opening is provided on the right side of the housing, and a cover body is detachably connected to the opening. Inside the housing, a first semiconductor refrigeration sheet, a battery to be tested, and a second semiconductor refrigeration sheet are sequentially attached from left to right; the elastic member is arranged between the left side wall of the housing and the first semiconductor refrigeration sheet and / or between the second semiconductor refrigeration sheet and the cover body;

[0007] The left side wall of the housing, the first semiconductor refrigeration sheet, the second semiconductor refrigeration sheet, the elastic member, and the cover body are all coaxially provided with a first light-transmitting hole, and the axes of the first light-transmitting holes extend corresponding to the middle part of the battery to be tested.

[0008] As a preferred solution, the battery in-situ test auxiliary device further includes a power supply, a controller, a first heat conduction sheet, a second heat conduction sheet, a first temperature detection component connected to the first heat conduction sheet, and a second temperature detection component connected to the second heat conduction sheet;

[0009] The first heat conduction sheet is arranged between the first semiconductor refrigeration sheet and the battery under test, and the second heat conduction sheet is arranged between the second semiconductor refrigeration sheet and the battery under test. Second light-transmitting holes coaxially arranged with the first light-transmitting hole are provided in the middle of the first heat conduction sheet and the second heat conduction sheet;

[0010] Both the first semiconductor refrigeration sheet and the second semiconductor refrigeration sheet are electrically connected to the power supply; the first temperature detection component, the second temperature detection component, the first semiconductor refrigeration sheet, the second semiconductor refrigeration sheet, and the power supply are all electrically connected to the controller.

[0011] As a preferred solution, a first groove is provided on the left side of the first heat conduction sheet, and the right side of the first semiconductor refrigeration sheet is inserted into the first groove; a second groove is provided on the right side of the second heat conduction sheet, and the left side of the second semiconductor refrigeration sheet is inserted into the second groove.

[0012] As a preferred solution, a battery fixing frame is connected to one side of the first heat conduction sheet facing the battery under test and / or one side of the second heat conduction sheet facing the battery under test, and the end of the battery under test is inserted into the battery fixing frame.

[0013] As a preferred solution, the battery in-situ test auxiliary device further includes an electrochemical workstation, and both the first heat conduction sheet and the second heat conduction sheet are connected to the electrochemical workstation.

[0014] As a preferred solution, the battery in-situ test auxiliary device further includes a pump body, a water tank, a first heat dissipation block, and a second heat dissipation block; the first heat dissipation block, the first semiconductor refrigeration sheet, the battery under test, the second semiconductor refrigeration sheet, the second heat dissipation block, and the elastic member are arranged in sequence from left to right;

[0015] A first circulating water flow channel is provided in the first heat dissipation block, and a second circulating water flow channel is provided in the second heat dissipation block; the pump body, the first circulating water flow channel, the second circulating water flow channel, and the water tank are sequentially connected through pipelines; Third light-transmitting holes coaxially arranged with the first light-transmitting hole are provided in the middle of the first heat dissipation block and the second heat dissipation block.

[0016] As a preferred solution, both the first heat dissipation block and the second heat dissipation block are copper blocks,

[0017] As a preferred solution, the elastic member is an elastic foam board.

[0018] As a preferred solution, each of the light-transmitting holes is a round hole, and the diameter of each light-transmitting hole is greater than or equal to 1 mm and less than or equal to 5 mm.

[0019] A battery in-situ testing system includes the above-mentioned battery in-situ testing auxiliary device, and the battery in-situ testing system further includes a spectral tester;

[0020] The spectral tester is provided with a light source and a detector. The battery in-situ testing auxiliary device is arranged between the light source and the detector, and the axes of the light-transmitting holes are arranged to coincide with the optical path of the light source.

[0021] Compared with the prior art, the beneficial effects of a battery in-situ testing auxiliary device of the present invention are as follows:

[0022] The battery in-situ testing auxiliary device according to an embodiment of the present invention includes an elastic member and a housing. The right side of the housing is provided with an opening, and a cover body is detachably connected to the opening. A first semiconductor refrigerating sheet, a battery under test, and a second semiconductor refrigerating sheet are sequentially arranged in the housing from left to right; the elastic member is arranged between the left side wall of the housing and the first semiconductor refrigerating sheet and / or between the second semiconductor refrigerating sheet and the cover body. The elastic member makes the first semiconductor refrigerating sheet, the battery under test, and the second semiconductor refrigerating sheet abut against each other in sequence, so that the cooling capacity of the first semiconductor refrigerating sheet and the second semiconductor refrigerating sheet is conducted to both poles of the battery under test. The first semiconductor refrigerating sheet and the second semiconductor refrigerating sheet have rapid refrigeration and can provide an ultra-low temperature environment below -25°C for the battery under test; the left side wall of the housing, the first semiconductor refrigerating sheet, the second semiconductor refrigerating sheet, the elastic member, and the cover body are all coaxially provided with light-transmitting holes, and the axes of the light-transmitting holes are all arranged in the middle of the battery under test; during use, the battery in-situ testing auxiliary device is placed between the light source and the detector of the spectral tester, and the light-transmitting holes are aligned with the optical path of the spectral tester, so that the battery under test can be tested in-situ. Description of the Drawings

[0023] Figure 1 is an exploded view of the battery in-situ testing auxiliary device according to an embodiment of the present invention;

[0024] Figure 2 is an assembled view of the battery in-situ testing auxiliary device according to an embodiment of the present invention;

[0025] Figure 3 is an exploded view of the battery under test;

[0026] Figure 4 is a schematic diagram of the battery in-situ testing system;

[0027] In the figure, 100 is an auxiliary device for in-situ testing of a battery; 1 is a housing; 2 is an elastic member; 3 is a cover; 41 is a first semiconductor refrigeration chip; 42 is a first heat sink; 5 is a battery under test; 51 is an electrolyte material; 52 is a positive electrode material; 53 is a negative electrode material; 54 is a positive electrode battery case; 55 is a negative electrode battery case; 61 is a second semiconductor refrigeration chip; 62 is a second heat sink; 7 is a first light-transmitting hole; 8 is a first heat conduction sheet; 9 is a second heat conduction sheet; 10 is a first temperature detection member; 11 is a second temperature detection member; 12 is a pump body; 13 is a water tank; 14 is an electrochemical workstation; 15 is a battery fixing frame; 161 is a light source; 162 is a detector; 17 is a connecting bolt; 18 is a nut; 21 is a power supply; 22 is a solid-state relay; 23 is a temperature control instrument; 24 is a computer. Detailed implementation manners

[0028] The following combines the accompanying drawings and embodiments to further describe in detail the specific implementation manners of the present invention. The following embodiments are used to illustrate the present invention, but are not used to limit the scope of the present invention.

[0029] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 should not be construed as a limitation of the present invention. It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0030] As Figures 1 to 4 shown, a preferred embodiment of an auxiliary device 100 for in-situ testing of a battery according to an embodiment of the present invention includes an elastic member 2 and a housing 1. The right side of the housing 1 is provided with an opening, and a cover 3 is detachably connected to the opening. Inside the housing 1, a first semiconductor refrigeration chip 41, a battery under test 5, and a second semiconductor refrigeration chip 61 are sequentially attached from left to right; the elastic member 2 is arranged between the left side wall of the housing 1 and the first semiconductor refrigeration chip 41 and / or between the second semiconductor refrigeration chip 61 and the cover 3; the elastic member 2 can make the first semiconductor refrigeration chip 41, the battery under test 5, and the second semiconductor refrigeration chip 61 abut against each other in sequence, so that the heat of the first semiconductor refrigeration chip 41 and the second semiconductor refrigeration chip 61 is conducted to both poles of the battery under test, and the semiconductor refrigeration component can provide a cryogenic ambient temperature lower than -25°C to the battery under test.

[0031] The left side wall of the housing 1, the first semiconductor refrigerating sheet 41, the second semiconductor refrigerating sheet 61, the elastic member 2, and the cover 3 are all coaxially provided with a first light-transmitting hole 7, and the axes of the first light-transmitting holes 7 are correspondingly arranged in the middle of the battery 5 to be measured. During use, as Figure 4 shown, place the battery in-situ test auxiliary device 100 between the light source 161 and the detector 162 of the spectral tester, so that the first light-transmitting hole 7 is aligned with the optical path of the spectral tester, and the battery to be measured can be tested in-situ. Specifically, the housing 1 and the cover 3 are detachably connected by a connecting bolt 17. The housing 1 is provided with a bolt mounting hole for the connecting bolt 17 to pass through. After the connecting bolt 17 passes through the bolt mounting hole, it is screwed with a nut 18.

[0032] Among them, in order to accurately control the ambient temperature of the battery to be measured, the battery in-situ test auxiliary device further includes a power supply 21, a controller, a first heat conduction sheet 8, a second heat conduction sheet 9, a first temperature detection member 10 connected to the first heat conduction sheet 8, and a second temperature detection member 11 connected to the second heat conduction sheet 9; the first heat conduction sheet 8 is arranged between the first semiconductor refrigerating sheet 41 and the battery 5 to be measured, the second heat conduction sheet 9 is arranged between the second semiconductor refrigerating sheet 61 and the battery 5 to be measured, and the middle parts of the first heat conduction sheet 8 and the second heat conduction sheet 9 are both provided with second light-transmitting holes coaxially arranged with the first light-transmitting hole 7.

[0033] Both the first semiconductor refrigerating sheet 41 and the second semiconductor refrigerating sheet 61 are electrically connected to the power supply 21. By adjusting the output power of the power supply 21, the refrigerating power of the first semiconductor refrigerating sheet 41 and the second semiconductor refrigerating sheet 61 can be adjusted. The first temperature detection member 10, the second temperature detection member 11, the first semiconductor refrigerating sheet 41, the second semiconductor refrigerating sheet 61, and the power supply 21 are all electrically connected to the controller. The first temperature detection member 10 and the second temperature detection member 11 respectively detect the temperature of the first heat conduction sheet 8 and the temperature of the second heat conduction sheet 9. When the temperatures detected by the first temperature detection member 10 and the second temperature detection member 11 are higher than the set temperature, the controller sends an electrical signal to the power supply 21, so that the output power of the power supply 21 increases, thereby increasing the refrigerating power of the first semiconductor refrigerating sheet 41 and the second semiconductor refrigerating sheet 61, and reducing the temperatures of the first heat conduction sheet 8 and the second heat conduction sheet 9 to the set value.

[0034] Specifically, as Figure 1 、 Figure 4As shown, the first temperature detector 10 and the second temperature detector 11 are both thermistors. The controller includes a temperature control instrument 23 and a solid-state relay 22. The control end of the solid-state relay 22 is connected to the output end of the temperature control instrument 23. The first semiconductor refrigeration chip 41 and the second semiconductor refrigeration chip 61 are connected in series and then connected in series with the power supply 21 and the output end of the solid-state relay 22 in sequence. The first temperature detector 10 and the second temperature detector 11 are connected to the input port of the temperature control instrument 23, converting the temperature environment information of the battery under test into an electrical signal and delivering it to the temperature control instrument 23 to form a refrigeration working circuit.

[0035] In this embodiment, as Figure 1 , Figure 4 shown, the battery in-situ test auxiliary device 100 further includes a pump body 12, a water tank 13, a first heat sink 42, and a second heat sink 62; the first heat sink 42, the first semiconductor refrigeration chip 41, the battery under test 5, the second semiconductor refrigeration chip 61, the second heat sink 62, and the elastic member 2 are arranged in sequence from left to right; specifically, the elastic member 2 is an elastic foam board, and the elastic foam board can ensure a large contact area between the elastic member 2 and the second heat sink 62, so as to ensure that the elastic force of the elastic member 2 is evenly applied to each position of the second heat sink 62, further ensuring full contact between the second heat sink 62 and the second semiconductor refrigeration chip 61; the first heat sink 42 is provided with a first circulating water flow channel, and the second heat sink 62 is provided with a second circulating water flow channel; the pump body 12, the first circulating water flow channel, the second circulating water flow channel, and the water tank 13 are sequentially connected through pipes, and third light-transmitting holes coaxial with the first light-transmitting hole 7 are provided in the middle of the first heat sink 42 and the second heat sink 62.

[0036] Specifically, the right side of the first semiconductor refrigeration chip 41 is the refrigeration side, and the left side of the first semiconductor refrigeration chip 41 is the heat dissipation side. The setting of the first heat sink 42 can ensure the refrigeration effect of the first semiconductor refrigeration chip 41; the left side of the second semiconductor refrigeration chip 61 is the refrigeration side, and the right side of the second semiconductor refrigeration chip 61 is the heat dissipation side. The setting of the second heat sink 62 can ensure the refrigeration effect of the second semiconductor refrigeration chip 61. Among them, both the first semiconductor refrigeration chip 41 and the second semiconductor refrigeration chip 61 are copper blocks.

[0037] In this embodiment, a first groove is provided on the left side of the first heat conduction sheet 8, and the right side of the first semiconductor refrigeration sheet 41 is inserted into the first groove. The setting of the first groove can increase the contact area between the refrigerating side of the first semiconductor refrigeration sheet 41 and the first heat conduction sheet 8, improving the heat conduction efficiency. At the same time, the first groove can position the first semiconductor refrigeration sheet 41 and the first heat conduction sheet 8, facilitating the assembly of the battery in-situ test auxiliary device 100. A second groove is provided on the right side of the second heat conduction sheet 9, and the left side of the second semiconductor refrigeration sheet 61 is inserted into the second groove. The setting of the second groove can increase the contact area between the refrigerating side of the second semiconductor refrigeration sheet 61 and the second heat conduction sheet 9, and at the same time realize the installation and positioning between the second semiconductor refrigeration sheet 61 and the second heat conduction sheet 9.

[0038] In this embodiment, as Figure 4 shown, the battery in-situ test auxiliary device 100 further includes an electrochemical workstation 14, and both the first heat conduction sheet 8 and the second heat conduction sheet 9 are connected to the electrochemical workstation 14. In addition to conducting heat, the first heat conduction sheet 8 and the second heat conduction sheet 9 are also used to transmit electrochemical test signals, and the first heat conduction sheet 8 and the second heat conduction sheet 9 can be made of metals such as stainless steel, copper, nickel, and aluminum.

[0039] In this embodiment, a battery fixing frame 15 is connected to the side of the first heat conduction sheet 8 facing the battery under test 5 and / or the side of the second heat conduction sheet 9 facing the battery under test 5, and the end of the battery under test 5 is inserted into the battery fixing frame 15. The setting of the battery fixing frame 15 facilitates the positioning and installation of the battery under test 5 on the first heat conduction sheet 8 and / or the second heat conduction sheet 9.

[0040] In this embodiment, each of the first light-transmitting holes 7 is a circular hole, and the diameter of each first light-transmitting hole 7 is greater than or equal to 1 mm and less than or equal to 5 mm.

[0041] In this embodiment, as Figure 2 shown, the battery under test 5 includes a positive electrode battery case 54, a positive electrode material 52, an electrolyte material 51, a negative electrode material 53, and a negative electrode battery case 55. The positive electrode battery case 54 and the negative electrode battery case 55 are used for the electrolyte material 51, the negative electrode material 53, and the negative electrode battery case 55. In this embodiment, according to experimental requirements, light-transmitting holes can be opened at the centers of non-tested materials to avoid interference of non-tested materials with the spectroscopic test signals of the tested materials. For example, when testing the electrolyte material 51, light-transmitting holes are opened at the centers of the positive electrode material 52 and the negative electrode material 53.

[0042] A battery in-situ test system includes the above-mentioned battery in-situ test auxiliary device 100, and the battery in-situ test system further includes a spectroscopic tester. The spectroscopic tester is provided with a light source 161 and a detector 162. The battery in-situ test auxiliary device 100 is arranged between the light source 161 and the detector 162, and the axes of all the first light-transmitting holes 7 are arranged to coincide with the optical path of the light source 161.

[0043] Specifically, the spectral tester can perform X-ray scattering / diffraction / reflection / absorption spectroscopy / imaging, neutron scattering / diffraction / reflection / imaging, ultraviolet-visible absorption spectroscopy, infrared spectroscopy, and Raman spectroscopy. The electrochemical workstation 14 is connected to the positive and negative electrodes of the material to be tested and is also connected to the computer 24 to form an electrochemical test unit. The electrochemical test unit is placed in a dry and inert gas atmosphere. The user inputs the required temperature on the temperature control instrument 23, and the temperature control instrument 23 adjusts the temperature of the sample to be tested according to the set cooling program. The light source 161, the detector 162, the electrochemical workstation 14, and the computer 24 start working simultaneously to realize the characterization of the electrochemical information and the structural information revealed by spectroscopy of the battery or the sample with temperature and working process as variables.

[0044] In summary, the embodiment of the present invention provides a battery in-situ test auxiliary device, which realizes the function of providing an ultra-low temperature environment temperature below -25°C to the battery to be tested by setting the first semiconductor refrigeration chip and the second semiconductor refrigeration chip, and can be widely applied to common spectral testers, providing conditions for ultra-low temperature battery in-situ testing. The battery in-situ test system of the embodiment of the present invention realizes the testing of the structure and electrochemical performance of the battery in an ultra-low temperature environment through the electrochemical workstation and the spectral tester, has powerful functions and convenient operation, and has high versatility.

[0045] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and substitutions can be made, and these improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An in-situ test auxiliary device for a battery, characterized in that, It includes an elastic member (2) and a housing (1). The right side of the housing (1) is provided with an opening, and a cover body (3) is detachably connected to the opening. Inside the housing (1), a first semiconductor refrigerating sheet (41), a battery under test (5), and a second semiconductor refrigerating sheet (61) are sequentially attached from left to right; the elastic member (2) is arranged between the left side wall of the housing (1) and the first semiconductor refrigerating sheet (41) and / or between the second semiconductor refrigerating sheet (61) and the cover body (3); The left side wall of the housing (1), the first semiconductor refrigerating sheet (41), the second semiconductor refrigerating sheet (61), the elastic member (2), and the cover body (3) are all coaxially provided with a first light-transmitting hole (7), and the axes of the first light-transmitting holes (7) extend corresponding to the middle of the battery under test (5); The battery in-situ test auxiliary device further includes an electrochemical workstation (14), a first heat conducting sheet (8), and a second heat conducting sheet (9). The first heat conducting sheet (8) is arranged between the first semiconductor refrigerating sheet (41) and the battery under test (5), and the second heat conducting sheet (9) is arranged between the second semiconductor refrigerating sheet (61) and the battery under test (5); the first heat conducting sheet (8) and the second heat conducting sheet (9) are both connected to the electrochemical workstation (14); the first heat conducting sheet (8) and the second heat conducting sheet (9) are both metal parts, and the first heat conducting sheet (8) and the second heat conducting sheet (9) are both used for heat conduction and also for conducting electrochemical test signals.

2. The in-situ test auxiliary device for a battery according to claim 1, wherein, The battery in-situ test auxiliary device further includes a power supply (21), a controller, a first temperature detection part (10) connected to the first heat conducting sheet (8), and a second temperature detection part (11) connected to the second heat conducting sheet (9); The middle parts of the first heat conducting sheet (8) and the second heat conducting sheet (9) are both provided with second light-transmitting holes coaxially arranged with the first light-transmitting hole (7); The first semiconductor refrigerating sheet (41) and the second semiconductor refrigerating sheet (61) are both electrically connected to the power supply (21); the first temperature detection part (10), the second temperature detection part (11), the first semiconductor refrigerating sheet (41), the second semiconductor refrigerating sheet (61), and the power supply (21) are all electrically connected to the controller.

3. The in-situ battery testing auxiliary device according to claim 2, characterized in that, The left side of the first heat conducting sheet (8) is provided with a first groove, and the right side of the first semiconductor refrigerating sheet (41) is inserted into the first groove; the right side of the second heat conducting sheet (9) is provided with a second groove, and the left side of the second semiconductor refrigerating sheet (61) is inserted into the second groove.

4. The in-situ battery testing auxiliary device according to claim 2, characterized in that, A battery fixing frame (15) is connected to one side of the first heat conducting sheet (8) opposite to the battery under test (5) and / or one side of the second heat conducting sheet (9) opposite to the battery under test (5), and the end of the battery under test (5) is inserted into the battery fixing frame (15).

5. The in-situ battery testing assistance device according to claim 1, wherein The battery in-situ test auxiliary device further includes a pump body (12), a water tank (13), a first heat sink (42), and a second heat sink (62); the first heat sink (42), the first semiconductor refrigeration chip (41), the battery under test (5), the second semiconductor refrigeration chip (61), the second heat sink (62), and the elastic member (2) are arranged in sequence from left to right; The first heat sink (42) is provided with a first circulating water flow channel, and the second heat sink (62) is provided with a second circulating water flow channel; the pump body (12), the first circulating water flow channel, the second circulating water flow channel, and the water tank (13) are sequentially connected through pipelines; third light-transmitting holes coaxial with the first light-transmitting holes (7) are provided in the middle of both the first heat sink (42) and the second heat sink (62).

6. The in-situ battery testing auxiliary device according to claim 5, wherein Both the first heat sink (42) and the second heat sink (62) are copper blocks.

7. The in-situ battery testing auxiliary device according to claim 1, characterized in that, The elastic member (2) is an elastic foam board.

8. The in-situ battery test assistance device according to claim 1, characterized in that Each of the first light-transmitting holes (7) is a circular hole, and the diameter of each of the first light-transmitting holes (7) is greater than or equal to 1 mm and less than or equal to 5 mm.

9. An in-situ battery testing system, characterized in that, The battery in-situ test system further includes a spectral tester, including the battery in-situ test auxiliary device according to any one of claims 1 to 8; The spectral tester is provided with a light source (161) and a detector (162), the battery in-situ test auxiliary device is arranged between the light source (161) and the detector (162), and the axes of the light-transmitting holes are arranged to coincide with the optical path of the light source (161).

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