Battery charging and discharging gas production test tool

Abstract

The utility model provides a battery charging and discharging gas production test tool which comprises a detection box composed of a lower shell and an upper shell, an inner cavity is arranged between the lower shell and the upper shell, and a pressure sensor is arranged at the top end of the inner cavity; an air inlet communicated with the outside is formed in one side end of the inner cavity, and an air outlet communicated with the outside is formed in the other side end of the inner cavity; a first tab connecting part is arranged on one side of the inner cavity, a second tab connecting part is arranged on the other side of the inner cavity, and the first tab connecting part comprises two groups of first clamping assemblies. The first tab connecting part with the two groups of first clamping assemblies can be used for clamping batteries with tabs on the same side, electrically connecting the tabs and then detecting the tabs, and the second tab connecting part of the second clamping assembly with a relatively long length is arranged at the other end, so that the tabs of the batteries can be conveniently clamped and detected when the tabs of the batteries are on two sides; the clamping mode can ensure that the connecting terminal stably clamps the battery tab, the clamping is more stable, and data fluctuation or errors during testing are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of battery detection, in particular to a battery charging and discharging gas generation testing tool. Background Art

[0002] Batteries, as new energy devices that can convert electrical energy into chemical energy, have attracted considerable attention. However, due to complex chemical reactions during the charge and discharge process, these batteries often produce gas, which increases the internal pressure and causes flatulence, negatively impacting battery performance. Publication No. CN116243180A describes an in-situ testing method for gas production during charge and discharge of soft-pack batteries. This method provides a gas production test mold for detecting battery gas production. However, this mold is relatively crude and cannot accurately connect to battery electrodes of different models and types. Furthermore, the connection method is cumbersome and the connection effect is unstable, which can easily lead to data fluctuations and errors. Furthermore, the mold has poor sealing properties and is prone to leakage, further affecting data accuracy.

[0003] In view of this, the applicant filed this application after studying the existing technology. Utility Model Content

[0004] The utility model provides a battery charging and discharging gas generation test tool, which aims to improve at least one of the above technical problems.

[0005] In order to solve the above technical problems, the utility model provides a battery charging and discharging gas production test tool, including a detection box composed of a lower shell and an upper shell, an inner cavity for placing the battery is provided between the lower shell and the upper shell, and a pressure sensor is provided at the top of the inner cavity; one side end of the inner cavity is provided with an air inlet connected to the outside, and the other side end is provided with an air outlet connected to the outside; a first pole ear connection part is provided on one side of the inner cavity, and a second pole ear connection part is provided on the other side, and the first pole ear connection part includes two groups of symmetrically arranged first clamping assemblies, and the two first clamping assemblies are arranged at intervals.

[0006] As a further optimization, the first clamping assembly includes a first connecting terminal, a first connecting frame, a first pressure plate and a plurality of first pins, the first pressure plate is arranged between the first connecting terminal and the first connecting frame, the upper end of the first pin is connected to the first connecting frame, and the lower end is connected to the bottom end of the inner cavity, and the first pin passes through the first pressure plate and is slidably connected.

[0007] As a further optimization, the first clamping assembly also includes multiple first springs, which are arranged on the first pin, and the upper end of the first spring is against the first connecting frame, and the lower end is against the first pressure plate.

[0008] As a further optimization, an inclined portion is provided at one end of the first pressure plate close to the battery.

[0009] As a further optimization, the second tab connection portion includes a second clamping assembly, the second clamping assembly includes a second connecting terminal, a second connecting frame, a second pressure plate and a plurality of second pins, the second pressure plate is arranged between the second connecting terminal and the second connecting frame, the upper end of the second pin is connected to the second connecting frame, and the lower end is connected to the bottom end of the inner cavity, and the second pin passes through the second pressure plate and is slidably connected.

[0010] As a further optimization, the second clamping assembly also includes multiple second springs, which are arranged on the second pin, and the upper end of the second spring is against the second connecting frame, and the lower end is against the second pressure plate.

[0011] As a further optimization, an annular groove is provided at the upper end of the lower shell, and a sealing member is provided in the annular groove.

[0012] As a further optimization, the air inlet is located on the lower shell, and the air outlet is located on the upper shell.

[0013] As a further optimization, the detection box is provided with a plurality of screw holes for connecting the lower shell and the upper shell.

[0014] By adopting the above technical solution, the utility model can achieve the following technical effects:

[0015] The present application provides a battery charge and discharge gas production test tool, including a test box consisting of a lower shell and an upper shell, an inner cavity for placing the battery is provided between the lower shell and the upper shell, and a pressure sensor is provided at the top of the inner cavity; an air inlet connected to the outside is provided at one end of the inner cavity, and an air outlet connected to the outside is provided at the other end; a first tab connection portion is provided on one side of the inner cavity, and a second tab connection portion is provided on the other side, and the first tab connection portion includes two sets of first clamping assemblies. The first tab connection portion with two sets of first clamping assemblies can clamp and electrically connect batteries with tabs on the same side for testing, and a second tab connection portion of a longer second clamping assembly is provided at the other end. When the battery tabs are on both sides, it is also convenient to clamp and test the battery tabs. In addition, the clamping method can ensure that the connection terminals stably clamp the battery tabs, which is more stable and avoids data fluctuations or errors during testing. At the same time, the test box of the present application has good airtightness, avoids air leakage, ensures accuracy during data analysis, and can simultaneously test and analyze pressure data. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 This is a structural diagram of a battery charging and discharging gas production test tool of the utility model;

[0018] Figure 2 It is a partial cross-sectional schematic diagram of one side of the lower shell of the utility model;

[0019] Figure 3 This utility model Figure 2 A in the middle is an enlarged schematic diagram;

[0020] Figure 4 It is a partial cross-sectional schematic diagram of the other side of the lower shell of the utility model;

[0021] Figure 5 It is a right side view of the upper shell of the utility model.

[0022] Markings in the figure: 1. Detection box; 2. Lower shell; 3. Upper shell; 4. Inner cavity; 5. Pressure sensor; 6. Air inlet; 7. Air outlet; 8. Battery; 9. First clamping assembly; 10. First connecting terminal; 11. First connecting frame; 12. First pressure plate; 13. First pin; 14. First spring; 15. Inclination portion; 16. Second clamping assembly; 17. Second connecting terminal; 18. Second connecting frame; 19. Second pressure plate; 20. Second pin; 21. Second spring; 22. Annular groove; 23. Sealing member; 24. Screw hole. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Depend on Figures 1 to 5 As shown, an embodiment of the utility model provides a battery charge and discharge gas production test tool, including a detection box 1 composed of a lower shell 2 and an upper shell 3, an inner cavity 4 for placing a battery 8 is provided between the lower shell 2 and the upper shell 3, and a pressure sensor 5 is provided at the top of the inner cavity 4; one side end of the inner cavity 4 is provided with an air inlet 6 connected to the outside, and the other side end is provided with an air outlet 7 connected to the outside, the air inlet 6 is connected to a carrier gas system (not shown in the figure) through an air inlet pipe for introducing inert gas into the inner cavity 4, and the air outlet 7 is connected to a gas composition analysis instrument such as a mass spectrometer or a chromatograph through an air outlet pipe for analysis.

[0025] Preferably, a first tab connection portion is provided on one side of the inner cavity 4, and a second tab connection portion is provided on the other side. The first tab connection portion includes two symmetrically arranged first clamping assemblies 9, with the two first clamping assemblies 9 spaced apart. The first clamping assembly 9 includes a first connection terminal 10, a first connecting frame 11, a first pressure plate 12, and a plurality of first pins 13. The first pressure plate 12 is provided between the first connection terminal 10 and the first connecting frame 11. The upper ends of the first pins 13 are connected to the first connecting frame 11, and the lower ends are connected to the bottom of the inner cavity 4. The first pins 13 pass through the first pressure plate 12 and slide into contact. The first connection terminal 10 is provided at the bottom of the inner cavity 4, and one end near the side wall of the inner cavity 4 is connected to the outside via an electrical wire. The first pins 13 allow the first pressure plate 12 to move stably in the longitudinal direction, making it parallel to the first connection terminal 10. This allows the tab of the battery 8 to be clamped and electrically connected when inserted between the first connection terminal 10 and the first pressure plate 12.

[0026] Furthermore, the first clamping assembly 9 includes a plurality of first springs 14, which are mounted on the first pin 13. The upper ends of the first springs 14 abut against the first connecting frame 11, and the lower ends abut against the first pressure plate 12. The provision of the first springs 14 allows the first springs 14 to exert elastic force on the first pressure plate 12 after the tabs of the battery 8 are inserted, allowing the first pressure plate 12 to stably clamp the tabs of the battery 8 against the first connecting terminal 10, thereby ensuring a stable electrical connection.

[0027] As a preferred embodiment, the first pressure plate 12 is provided with an angled portion 15 at one end close to the battery 8. By providing an inclined or curved angled portion 15 at one end of the first pressure plate 12 for clamping the battery 8 tab, the insertion of the battery 8 tab can be smoother and more convenient.

[0028] Preferably, the second tab connection portion includes a second clamping assembly 16, which includes a second connection terminal 17, a second connecting frame 18, a second pressure plate 19, and a plurality of second pins 20. The second pressure plate 19 is disposed between the second connection terminal 17 and the second connecting frame 18. The upper ends of the second pins 20 are connected to the second connecting frame 18, and the lower ends are connected to the bottom end of the inner cavity 4. The second pins 20 pass through the second pressure plate 19 and slide into contact therewith. The second pins 20 allow the second pressure plate 19 to move stably in the longitudinal direction, making it parallel to the second connection terminal 17. This allows the tab of the battery 8 to be clamped and electrically connected when it is inserted between the second connection terminal 17 and the second pressure plate 19.

[0029] Furthermore, the second clamping assembly 16 includes a plurality of second springs 21, which are mounted on the second pin 20. The upper ends of the second springs 21 abut against the second connecting frame 18, and the lower ends abut against the second pressure plate 19. By providing the second springs 21, when the battery 8 tab is inserted, the elastic force exerted by the second springs 21 on the second pressure plate 19 allows the second pressure plate 19 to stably clamp the battery 8 tab to the second connecting terminal 17, ensuring a stable electrical connection. The second pressure plate 19 can also be configured with an angled portion similar to the first pressure plate 12 to facilitate insertion of the battery 8 tab.

[0030] Among them, the length of the second tab connection portion is greater than the length of a set of first clamping components 9, so that it is more convenient to connect the battery 8 tabs. In this embodiment, by providing a first tab connection portion with two sets of first clamping components 9 at one end of the detection box 1, the battery 8 with the tabs on the same side can be clamped and electrically connected for testing, and further providing a second tab connection portion of a second clamping component 16 with a longer length at the other end. In this way, if the battery 8 tabs are on both sides, it is also convenient to clamp and test the battery 8 tabs. At the same time, the clamping method in this embodiment can ensure that the connection terminal stably clamps the battery 8 tabs, which is more stable and avoids data fluctuations or errors during testing.

[0031] Preferably, an annular groove 22 is provided at the upper end of the lower housing 2, and a seal 23 is disposed within the annular groove 22. The seal 23 ensures a seal within the inner cavity 4 when the upper and lower housings 3 and 2 are closed. The wires connected to the inner cavity 4 pass through the first connecting bracket 11 and the second connecting bracket 18, respectively, and then connect to the connection terminals. These two brackets are closely positioned against the sidewalls of the inner cavity 4, sealing the gaps between the wires and the inner cavity 4 wall, further ensuring a sealed interior.

[0032] Preferably, the air inlet 6 is located on the lower shell 2 and the air outlet 7 is located on the upper shell 3. Since the density of the inert gas is relatively high, the air inlet 6 is set at a low position and the air outlet 7 is set at a high position, which can effectively increase the speed of the carrier gas process.

[0033] During testing, an inert gas is first introduced into the inner cavity 4 through the air inlet 6 to ensure that the entire inner cavity 4 is filled, and the outgoing gas is collected at the air outlet 7 to perform a blank test to ensure that there are no impurities in the inner cavity 4. Then, a charge-discharge cycle reaction is performed through the first tab connection or the second tab connection, and the gas leaving the air outlet 7 is collected and analyzed at each stage. Preferably, the pressure sensor 5 provided in the inner cavity 4 can be pressed against the surface of the battery 8 below during testing, so that the pressure data can be tested and analyzed simultaneously during the gas analysis, and the expansion data of the battery 8 can be collected and analyzed.

[0034] The detection box 1 is provided with a plurality of screw holes 24 for connecting the lower shell 2 and the upper shell 3. The screw holes 24 are arranged in a ring shape on the detection box 1, so as to ensure a tight connection between the upper shell 3 and the lower shell 2 from various positions, thereby further ensuring the internal airtightness.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A battery charge and discharge gas production test tool, characterized in that: The invention comprises a detection box consisting of a lower shell and an upper shell, an inner cavity for placing a battery is provided between the lower shell and the upper shell, and a pressure sensor is provided at the top of the inner cavity; an air inlet connected to the outside is provided at one end of the inner cavity, and an air outlet connected to the outside is provided at the other end; a first pole lug connecting portion is provided on one side of the inner cavity, and a second pole lug connecting portion is provided on the other side, and the first pole lug connecting portion includes two groups of symmetrically arranged first clamping assemblies, and the two first clamping assemblies are arranged at intervals.

2. A battery charge and discharge gas production test tool according to claim 1, characterized in that The first clamping assembly includes a first connecting terminal, a first connecting frame, a first pressure plate and a plurality of first pins. The first pressure plate is arranged between the first connecting terminal and the first connecting frame. The upper end of the first pin is connected to the first connecting frame, and the lower end is connected to the bottom end of the inner cavity. The first pin passes through the first pressure plate and is slidably connected.

3. A battery charge and discharge gas production test tool according to claim 2, characterized in that The first clamping assembly also includes a plurality of first springs, which are arranged on the first pin, and the upper end of the first spring is against the first connecting frame, and the lower end is against the first pressure plate.

4. A battery charge and discharge gas production test tool according to claim 2, characterized in that , the first pressure plate is provided with an inclined portion at one end close to the battery.

5. A battery charge and discharge gas production test tool according to claim 1, characterized in that The second tab connection portion includes a second clamping assembly, which includes a second connecting terminal, a second connecting frame, a second pressure plate and a plurality of second pins. The second pressure plate is arranged between the second connecting terminal and the second connecting frame. The upper end of the second pin is connected to the second connecting frame, and the lower end is connected to the bottom end of the inner cavity. The second pin passes through the second pressure plate and is slidably connected.

6. A battery charge and discharge gas production test tool according to claim 5, characterized in that The second clamping assembly also includes a plurality of second springs, which are arranged on the second pin. The upper end of the second spring is against the second connecting frame, and the lower end is against the second pressure plate.

7. A battery charge and discharge gas production test tool according to claim 1, characterized in that The upper end of the lower shell is provided with an annular groove, and a sealing member is provided in the annular groove.

8. A battery charge and discharge gas production test tool according to claim 1, characterized in that , the air inlet is located on the lower shell, and the air outlet is located on the upper shell.

9. A battery charge and discharge gas production test tool according to claim 1, characterized in that The detection box is provided with a plurality of screw holes for connecting the lower shell and the upper shell.

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