Battery cell performance test current terminal anti-oxidation device

Abstract

The utility model relates to a kind of electric core performance test current terminal anti-oxidation device, belong to new energy battery technical test field, comprising: shell, shell is equipped with flap, transparent lens is equipped in the middle of flap, the inside both sides of shell are equipped with insulating gel filler, the outer wall of shell is equipped with knob that can be extruded with gel filler;Shell top and bottom are equipped with with shell inside intercommunication connection port, two connection ports are respectively connected with first air pipe and second air pipe, first air pipe is connected with the air pipe that can be inhaled inert gas.This utility model can solve the problem of the resistance rise of the connection between the tab of the electric core and the current terminal, which affects the safety and accuracy of the electric core test.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery testing technology, specifically to an anti-oxidation device for the current terminal of a battery cell performance test. Background Technology

[0002] With the depletion of traditional energy sources and increasingly serious environmental problems, lithium batteries, with their high energy density, long lifespan, and environmental friendliness, are widely used in new energy vehicles, aerospace, communications, and other fields. In recent years, the rapid development of lithium batteries has led to an increase in related standard testing. Especially during long-term cycle testing, the connection between the cell tabs and current terminals is prone to oxidation due to continuous charging and discharging, causing an increase in resistance at the connection point. This seriously affects the safety and accuracy of cell testing. Therefore, an anti-oxidation device for the current terminals in cell performance testing is proposed to solve the aforementioned problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an anti-oxidation device for the current terminal of a battery cell performance test. This device has the advantage of preventing oxidation at the connection point between the battery cell tab and the current terminal due to continuous charging and discharging, which causes the temperature at the connection point to rise. This solves the problem of seriously affecting the safety and accuracy of battery cell testing.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] An anti-oxidation device for current terminals of battery cell performance testing includes a housing, a flip cover with a transparent lens in the middle, insulating gel-like fillers on both sides inside the housing, and a knob on the outer wall of the housing that can be squeezed against the gel-like fillers.

[0006] The top and bottom of the shell are provided with connection ports that communicate with the inside of the shell. The two connection ports are respectively connected to the first air guide pipe and the second air guide pipe. The first air guide pipe is connected to a vent pipe that can introduce inert gas.

[0007] In this embodiment, the knob adjusts the gel-like filler on both sides inside the housing, which can achieve a sealing treatment of the rigidly connected battery cell tabs and current terminals that are prone to thermal expansion and contraction under temperature changes, thus avoiding a deterioration in sealing performance during use.

[0008] In one embodiment, the transparent lens is made of a thermochromic material.

[0009] In this embodiment, a transparent lens made of thermochromic material is used, which changes color with temperature to indicate that the connection point is too hot.

[0010] In one embodiment, the first air guide tube includes an upper section, a middle section, and a lower section that are integrally connected in sequence. The lower section of the first air guide tube is sealed to the connection port and communicates with the inside of the housing. The upper section of the first air guide tube can be connected to a vent pipe.

[0011] In this embodiment, by setting a first gas guide tube, a corresponding temperature protection gas that meets the test requirements, i.e. an inert gas, can be introduced. This gas can both remove the heat generated by the current charging and discharging and protect the current terminal connection from oxidation.

[0012] In one embodiment, the middle section of the first air tube is upright, that is, it remains vertical and perpendicular to the ground.

[0013] In this embodiment, by setting the middle section of the first gas guide tube to be vertical, it is easier to obtain the gas flow rate.

[0014] In one embodiment, two needle valves are provided on the middle section of the first air guide tube, and the tube body between the two needle valves is set as a concentric shaped tube, that is, the upper diameter of the concentric shaped tube is larger than the lower diameter, and a conical rotor is installed inside the concentric shaped tube.

[0015] In this embodiment, by setting a conical rotor, the height to which the conical rotor is raised can be used to identify the amount of gas flow.

[0016] In one embodiment, the outer wall of the concentric shaped tube is engraved with air flow rate markings.

[0017] In this embodiment, the height of the conical rotor can be visually observed through the air flow scale, and the gas flow rate at that time can be obtained.

[0018] In one embodiment, the housing, flip cover, transparent lens, and first air duct are all made of insulating materials resistant to high and low temperatures, that is, the housing, flip cover, knob, and first air duct are all made of polytetrafluoroethylene.

[0019] In this embodiment, the components made of polytetrafluoroethylene (PTFE) can prevent short circuits in the battery cells during use.

[0020] In one embodiment, the connection ports at the top and bottom of the housing are staggered.

[0021] In this embodiment, by staggering the connection ports, it is easier to remove heat from the connection point between the battery cell's tabs and the current terminals.

[0022] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0023] By adjusting the gel-like filling material on both sides inside the housing using a knob, the rigid connection between the battery cell tabs and the current terminals, which are prone to thermal expansion and contraction under temperature changes, can be sealed to prevent the sealing performance from deteriorating during use. The first gas duct can be used to introduce a protective gas at the corresponding temperature that meets the test requirements, i.e., an inert gas, which can both remove the heat generated by current charging and discharging and protect the current terminal connection from oxidation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of this utility model;

[0025] Figure 2 This is a schematic diagram of the first air duct structure of this utility model. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1 An anti-oxidation device for the current terminal of a battery cell performance test in this embodiment includes a housing 1, and a flip cover 2 that can be opened and closed is provided in the middle of the housing 1.

[0028] In some embodiments of this utility model, such as Figure 1 As shown, the flip cover 2 can be opened manually. The flip cover 2 is folded upwards to facilitate the installation of the battery cell's tabs and current terminals in the housing 1. In addition, in this embodiment, the flip cover 2 and the housing 1 are the same, both made of high-temperature and low-temperature resistant insulating material, namely polytetrafluoroethylene, to avoid short circuit problems of the battery cell during use.

[0029] In some embodiments of this utility model, the inner sides of the housing 1 are provided with insulating gel-like filler 4 (the gel-like filler 4 is wrapped with a thin film for insulation), and the outer wall of the housing 1 is provided with a knob 5. The inside of the knob 5 can be inserted into the inside of the housing 1 and can contact and squeeze the gel-like filler 4. In this embodiment, the gel-like filler 4 is made of insulating material.

[0030] In this embodiment, since the battery cell tab and current terminal are usually rigidly connected, they will deform due to thermal expansion and contraction as the test temperature changes. Ordinary rigid sealing methods will deteriorate due to temperature changes. Therefore, in this embodiment, the extrusion pressure is adjusted by knob 5. The flexible seal of the gel filler 4 can still ensure the sealing performance under a certain pressure when the rigid material deforms.

[0031] In some embodiments of this utility model, such as Figure 1 As shown, the top and bottom of the housing 1 are provided with connection ports 6 that communicate with the interior of the housing 1 and are sealed at the connection points. The connection ports 6 at the top and bottom of the housing 1 are staggered, which can be understood as the center points of the two connection ports 6 not being on the same center line. The two connection ports 6 are respectively sealed to a first gas guide pipe 7 and a second gas guide pipe. The first gas guide pipe 7 is connected to a vent pipe that allows inert gas to be introduced. When the inert gas is introduced, it has a specified temperature, which can both remove the heat generated by the current charging and discharging and protect the current terminal connection from oxidation. The staggered arrangement of the connection ports 6 at the top and bottom can ensure that the introduced gas flows through the entire housing 1 and avoid the formation of gas flow dead zones.

[0032] like Figure 2 As shown, the first air duct 7 includes an integrated upper section 71, a middle section 72, and a lower section 73. The lower section 73 of the first air duct 7 is sealed to the connection port 6 and communicates with the interior of the housing 1. The upper section 71 of the first air duct 7 can be connected to a vent pipe. The upper section 71 of the first air duct 7 and the ports of the second air duct 12 away from the corresponding connection port 6 are also equipped with sealing caps 11. When the vent pipe is not connected, the two sealing caps 11 can be used to seal the upper section 71 of the first air duct 7 and the ports of the second air duct 12 away from the corresponding connection port 6. In this embodiment, the first air duct 7 and the sealing caps 11 are the same as the housing 1, both made of high-temperature and low-temperature resistant insulating materials, that is, also made of polytetrafluoroethylene material, to avoid short circuit problems of the battery cell during use.

[0033] In this embodiment, the middle section 72 of the first air duct 7 is upright, that is, it remains vertical and perpendicular to the ground. It should also be understood that the lower section 73 of the first air duct 7 is also upright, while the upper section 71 of the first air duct 7 can be a curved section.

[0034] In this embodiment, as Figure 2 As shown, two needle valves 8 are provided on the middle section 72 of the first air guide tube 7. The tube body between the two needle valves 8 is configured as a concentric shaped tube, that is, the diameter of the upper section 721 of the concentric shaped tube is larger than the diameter of the lower section 722, that is, the concentric shaped tube is thicker at the top and thinner at the bottom. Figure 2 As can be seen, the diameter of the entire concentric irregular tube gradually decreases from top to bottom. A conical rotor 9 is installed inside the concentric irregular tube.

[0035] In addition, in this embodiment, the outer wall of the concentric shaped tube is engraved with an air flow rate scale 10. The value of the air flow rate scale is determined based on the different heights the conical rotor 9 rises when different volumes of gas are introduced at this point during manufacturing. In use, the height at which the conical rotor 9 rises corresponds to the gas flow rate; different flow rates will raise the conical rotor 9 to different heights. In use, the gas flow rate can be adjusted using the needle valve 8 on the lower side, or the current gas flow rate can be determined by observing the height of the conical rotor 9 (the function of determining the gas flow rate can be illustrated by, for example, in similar tests, through experience, for cells tested using the same method, as long as the gas flow rate is adjusted to the corresponding value, the temperature at the tab and connection terminal can be kept stable and will not rise abnormally). It should be noted that, for example, if... Figure 2 When the conical rotor 9 is at the bottom of the concentric tube, the corresponding scale value is 0. When it is at the top, the corresponding scale value is the maximum value n (n is a positive value greater than 0). The gas flow rate value corresponding to the height of the conical rotor 9 has been approved in advance. The scale value of the air flow rate scale 10 is set according to the approval, and will not be described in detail here.

[0036] In some embodiments of this invention, a transparent lens 3 is provided in the middle of the flip cover 2. The transparent lens 3 is made of a thermochromic material (the specific material is not described in detail here; any material that can achieve this function can be used in this invention). It can change color with temperature changes; for example, it can be colorless and transparent below 60°C and turn blue above 60°C, thereby indicating that the temperature at the connection point (the connection between the battery cell's tab and the current terminal) is too high. In this embodiment, the size of the transparent lens 3 can be set as needed, as long as it allows clear observation of the desired part inside the housing 1.

[0037] The working principle of the above embodiments is as follows:

[0038] Fold the cover 2 upwards to open it. First, insert the two ends of the current terminals through the holes in the two gel fillers 4 from inside the housing 1. Then, insert the battery cell's tabs from outside the housing 1 into the holes in the two gel fillers 4 and connect them to the two ends of the current terminals respectively. The connection is completed into a long strip. After completion, close the cover 2, and then use the knob 5 to adjust and squeeze the gel fillers 4 to seal the battery cell tabs and current terminals. Note that if the battery cell is relatively large, such as when the distance between the two tabs of the battery cell is greater than... Figure 1 The lateral length of the inner casing (when the battery cell is not placed inside casing 1 during operation).

[0039] Next, connect the top connection port 6 of the housing 1 to the lower section 73 of the first air guide pipe 7, then connect the upper section 71 of the first air guide pipe 7 to the vent pipe, and connect the bottom connection port of the housing 1 to the second air guide pipe 12 (at this time, the second air guide pipe 12 is kept unobstructed to remove heat from the connection between the battery cell tab and the current terminal). Fully open the lower needle valve 8 and the upper needle valve 8, and introduce test protection cooling gas through the vent pipe. The gas flow rate can be controlled by adjusting the opening of the lower needle valve 8 by observing the air flow scale 10 corresponding to the height of the conical rotor 9. During the test, the condition of the battery cell tab and the current terminal can be observed through the transparent lens 3. If the transparent lens 3 changes color, it indicates that the temperature at the connection between the battery cell tab and the current terminal is abnormal and needs to be dealt with. The handling process will not be described in detail here.

[0040] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0041] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A device for preventing oxidation of a current terminal of a battery performance test, characterized by: Includes a housing (1), the housing (1) is provided with a flip cover (2), the flip cover (2) is provided with a transparent lens (3) in the middle, the inside of the housing (1) is provided with insulating gel filler (4) on both sides, and the outer wall of the housing (1) is provided with a knob (5) that can be squeezed with the gel filler (4); The top and bottom of the shell (1) are provided with connection ports (6) that communicate with the inside of the shell (1). The two connection ports (6) are respectively connected to the first gas guide pipe (7) and the second gas guide pipe (12). The first gas guide pipe (7) is connected to a vent pipe that can introduce inert gas.

2. The device of claim 1, wherein the device is configured to be placed on the current terminal of the battery cell during the performance test of the battery cell. The transparent lens (3) is made of thermochromic material.

3. The device of any one of claims 1-2, wherein the device is configured to be placed on a current terminal of an electrochemical cell during a performance test of the electrochemical cell. The first air duct (7) includes an upper section (71), a middle section (72) and a lower section (73) connected in sequence. The lower section (73) of the first air duct (7) is sealed to the connection port (6) and communicates with the inside of the housing (1). The upper section (71) of the first air duct (7) can be connected to the air pipe.

4. The device of claim 3, wherein the device is configured to be placed on the current terminal of the battery cell during the performance test of the battery cell. The middle section (72) of the first air duct (7) is upright, that is, it remains vertical and perpendicular to the ground.

5. The device of claim 4, wherein the device is configured to be placed on the current terminal of the battery cell during the performance test of the battery cell. Two needle valves (8) are provided on the middle section (72) of the first air guide tube (7). The tube body between the two needle valves (8) is set as a concentric shaped tube, that is, the diameter of the upper section (721) of the concentric shaped tube is larger than the diameter of the lower section (722). A conical rotor (9) is installed inside the concentric shaped tube.

6. The device of claim 5, wherein the device is configured to be placed on the current terminal of the battery cell during the performance test of the battery cell. The outer wall of the concentric shaped tube is engraved with air flow rate markings (10).

7. The device of claim 1, wherein the device is configured to be placed on a current terminal of an electrical cell during a performance test of the electrical cell. The housing (1), flip cover (2), transparent lens (3) and first air duct (7) are all made of insulating materials resistant to high and low temperatures, that is, the housing (1), flip cover (2), knob (5) and first air duct (7) are all made of polytetrafluoroethylene.

8. The anti-oxidation device for the current terminal of a battery cell performance test according to claim 1, characterized in that, The connection ports (6) at the top and bottom of the housing (1) are staggered.

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