Gas production detection device for battery formation

Abstract

The utility model relates to a battery formation gas production detection device, which comprises a collection part, a gas detection part and a control part, and is characterized in that the collection part is provided with a collection cavity which is used for being communicated with a liquid injection hole of a battery; the detection assembly is arranged in the collection cavity; the waterproof breathable part is arranged in the collection cavity and located on the upstream of the detection assembly, and the technical problem that the detection assembly is prone to corrosion failure can be solved through the battery formation gas production detection device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of battery detection, and more particularly, to a device for detecting gas generated during battery formation. Background Art

[0002] During the manufacturing process of batteries, such as lithium batteries, the formation process is one of the most critical processes, which is the process of initially charging newly produced batteries. The quality of the battery formation process will directly affect many performance characteristics of the final battery product, such as capacity, lifespan, and safety.

[0003] In related technologies, when using a detection component to detect the gas generated during battery formation, the detection component is in direct contact with the corrosive electrolyte volatilized during formation, which causes the detection component to be easily corroded and fail. Summary of the Utility Model

[0004] The purpose of the present disclosure is to provide a device for detecting gas generated during battery formation, which can solve the technical problem that the detection component is easily corroded and fails.

[0005] To achieve the above purpose, the present disclosure provides a device for detecting gas generated during battery formation, including: a collection member provided with a collection cavity for communicating with the liquid injection hole of the battery; a detection component disposed in the collection cavity; and a waterproof and breathable member disposed in the collection cavity and located upstream of the detection component.

[0006] Optionally, the waterproof and breathable member is configured as a waterproof and breathable membrane.

[0007] Optionally, the collection member is provided with a first opening communicating with the collection cavity, and the device for detecting gas generated during battery formation includes an installation structure that closes the first opening and is detachably connected to the collection member, and the detection component and the waterproof and breathable member are disposed on the installation structure.

[0008] Optionally, the installation structure includes an installation plate and a clamp. The clamp is sleeved on the outer periphery of the collection member and clamps the installation plate and the waterproof and breathable member. The installation plate covers the first opening, and the detection component is fixed to the inner side of the installation plate.

[0009] Optionally, the installation plate is provided with positioning holes. The detection component is disposed on a circuit board, and a fastener is disposed between the circuit board and the installation plate, and the fastener is threadedly connected to the positioning holes.

[0010] Optionally, the clamp clamps a support mesh, and the waterproof and breathable membrane covers the support mesh.

[0011] Optionally, the installation structure further includes a sealing ring for providing sealing at the connection between the collection member and the mounting plate, and the support mesh is connected within the sealing ring.

[0012] Optionally, the detection assembly includes at least one of a pressure sensor, a temperature sensor, and a gas sensor.

[0013] Optionally, the collection member is provided with a second opening communicating with the collection chamber, and the battery formation gas production detection device includes a connection structure detachably connected to the second opening and used for communicating with the liquid injection hole of the battery.

[0014] Optionally, the collection member is provided with a third opening communicating with the collection chamber, and a pressure relief valve is installed on the third opening.

[0015] Optionally, the collection member is provided with a fourth opening communicating with the collection chamber, and the fourth opening is used for connecting a functional component.

[0016] Optionally, the functional component is one of a pressure transmitter, a pressure gauge, and a vacuum pump.

[0017] Through the above technical solution, when detecting the gas produced during battery formation, the gas generated in the battery formation process can enter the collection chamber through the liquid injection hole. Since corrosive electrolyte will also volatilize during the battery formation process, that is, the volatilized electrolyte will enter the collection chamber together with the gas through the liquid injection hole. Therefore, by providing a waterproof and breathable component that can pass gas and block the passage of water molecules upstream of the detection assembly, the volatilized electrolyte cannot contact the detection assembly. Thus, the setting of the waterproof and breathable component can prevent the corrosive electrolyte from contacting the detection assembly, and thereby solve the technical problem that the detection assembly is prone to corrosion and failure, ensuring the service life of the detection assembly and the accuracy of the detection result of the gas produced during formation.

[0018] Other features and advantages of the present disclosure will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present disclosure, and constitute a part of the specification, and are used to explain the present disclosure together with the following specific implementation, but do not constitute a limitation to the present disclosure. In the drawings:

[0020] Figure 1 is a schematic structural diagram of a battery formation gas production detection device provided by an embodiment of the present disclosure;

[0021] Figure 2 is an exploded view of a battery formation gas production detection device provided by an embodiment of the present disclosure;

[0022] Figure 3It is a schematic diagram of the detection component of the battery formation gas generation detection device provided by an embodiment of the present disclosure.

[0023] Description of reference numerals

[0024] 1 - Collection member, 11 - Collection chamber, 12 - First opening, 13 - Second opening, 14 - Third opening, 15 - Fourth opening, 2 - Detection component, 21 - Pressure sensor, 22 - Temperature sensor, 23 - Gas sensor, 3 - Waterproof and breathable member, 4 - Mounting structure, 41 - Mounting plate, 42 - Clamp, 43 - Fastener, 44 - Support net, 45 - Sealing ring, 5 - Connecting structure, 51 - Connecting pipe, 52 - First flange, 53 - Second flange, 54 - Third flange, 55 - First vacuum clamp, 56 - Second vacuum clamp, 6 - Pressure relief valve, 10 - Circuit board, 20 - Liquid injection hole. Detailed implementation manners

[0025] The following details the specific implementation manners of the present disclosure with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only for the purpose of illustrating and explaining the present disclosure, and are not used to limit the present disclosure.

[0026] In the present disclosure, unless otherwise stated, the orientation terms "inside, outside" refer to "inside, outside" relative to the contour of the corresponding component itself. In addition, the use of terms such as "first", "second", etc. is for the purpose of distinguishing different components, and does not have sequence and importance. In addition, when referring to the accompanying drawings in the following description, the same reference numerals in different drawings represent the same elements. Those skilled in the art should understand that the above definitions are only for explaining and illustrating the present disclosure, and should not be construed as a limitation of the present disclosure.

[0027] According to the specific implementation manner of the present disclosure, referring to Figures 1 to 3 as shown, a battery formation gas generation detection device is provided, including: a collection member 1, the collection member 1 is provided with a collection chamber 11, and the collection chamber 11 is used to communicate with the liquid injection hole 20 of the battery; a detection component 2, disposed in the collection chamber 11; and a waterproof and breathable member 3, disposed in the collection chamber 11 and located upstream of the detection component 2.

[0028] Through the above technical solution, when performing formation gas production detection on the battery, the gas generated during the battery formation process can enter the collection chamber 11 through the liquid injection hole 20. Since corrosive electrolyte will also volatilize during the battery formation process, that is, the volatilized electrolyte will enter the collection chamber 11 together with the gas through the liquid injection hole 20. Therefore, by arranging a waterproof and breathable component 3 that can pass gas and block the passage of water molecules upstream of the detection component 2, the volatilized electrolyte cannot come into contact with the detection component 2. Thus, the arrangement of the waterproof and breathable component 3 can prevent the corrosive electrolyte from contacting the detection component 2. Thereby, the technical problem that the detection component 2 is prone to corrosion and failure can be solved, ensuring the service life of the detection component 2 and the accuracy of the formation gas production detection result.

[0029] In some embodiments of the present disclosure, referring to Figure 2 as shown, the waterproof and breathable component 3 can be configured as a waterproof and breathable membrane. In this way, by setting the waterproof and breathable component 3 as a thin film structure, the occupied space of the waterproof and breathable component 3 can be saved, and at the same time, the gas can quickly pass through the waterproof and breathable membrane, reducing the influence of the waterproof and breathable component 3 on the gas passing rate. Among them, the waterproof and breathable membrane can be made of anti-corrosive materials to avoid being corroded itself. For example, the waterproof and breathable membrane can be made of polypropylene material, or adjusted accordingly according to the selection of the electrolyte components in the battery, such as being replaced with polytetrafluoroethylene, nylon and other materials. The present disclosure does not make specific limitations on this.

[0030] In some embodiments of the present disclosure, referring to Figure 2 as shown, the collection member 1 is provided with a first opening 12 communicating with the collection chamber 11. The battery formation gas production detection device includes a mounting structure 4. The mounting structure 4 closes the first opening 12 and is detachably connected to the collection member 1. The detection component 2 and the waterproof and breathable component 3 are arranged on the mounting structure 4. In this way, by arranging the mounting structure 4 to close the first opening 12, the airtightness of the collection chamber 11 can be ensured, avoiding the influence of gas leakage on the detection accuracy of the detection component 2. At the same time, the mounting structure 4 is detachably connected to the collection member 1, facilitating the quick disassembly and replacement of the waterproof and breathable component 3 and the detection component 2 on the mounting structure 4.

[0031] In some embodiments of the present disclosure, referring to Figure 2As shown, the mounting structure 4 may include a mounting plate 41 and a clamp 42. The clamp 42 is sleeved on the outer periphery of the collecting member 1 and clamps the mounting plate 41 and the waterproof and breathable member 3. The mounting plate 41 covers the first opening 12, and the detection assembly 2 is fixed to the inner side of the mounting plate 41. In this way, since the clamp 42 is sleeved on the outer periphery of the collecting member 1, when the mounting plate 41 is clamped, the connection between the mounting plate 41 and the collecting member 1 can be realized, and the waterproof and breathable member 3 can be clamped between the mounting plate 41 and the first opening 12 of the collecting member 1, realizing the fixation of the waterproof and breathable member 3. In addition, by clamping the clamp 42, the sealing performance of the connection between the collecting member 1 and the mounting plate 41 can be ensured, preventing the gas in the collecting member 1 from escaping, and the installation operation of the clamp 42 is simple, facilitating the disassembly, assembly and replacement of the mounting plate 41 and the waterproof and breathable member 3.

[0032] Among them, the clamp 42 may also be set to other connection structures that can connect the mounting member to the collecting member 1 and ensure the sealing performance. The present disclosure does not make specific limitations on this.

[0033] In some embodiments of the present disclosure, referring to Figure 2 and Figure 3 As shown, positioning holes are provided on the mounting plate 41. The detection assembly 2 is arranged on the circuit board 10, and a fastener 43 is arranged between the circuit board 10 and the mounting plate 41. The fastener 43 is threadedly connected to the positioning holes. In this way, the installation position of the circuit board 10 can be quickly positioned through the positioning holes, and the circuit board 10 is threadedly connected to the positioning holes through the fastener 43, with simple operation and improved disassembly and assembly efficiency of the circuit board 10.

[0034] Among them, the circuit board 10 and the mounting plate 41 may also be connected through other connection structures to realize the detachable connection between the circuit board 10 and the mounting plate 41. The present disclosure does not make specific limitations on this.

[0035] In some embodiments of the present disclosure, referring to Figure 2 As shown, a support net 44 is clamped by the clamp 42, and the waterproof and breathable membrane covers the support net 44. In this way, the support net 44 can support the waterproof and breathable membrane, and also ensure the flatness of the waterproof and breathable membrane, preventing the waterproof and breathable membrane from folding, shrinking, etc., which may cause the volatile electrolyte to pass through the waterproof and breathable membrane and contact the detection assembly 2, damaging the detection assembly 2. In addition, by arranging the support net 44 to support the waterproof and breathable membrane, the occurrence of damage to the waterproof and breathable membrane caused by gas extrusion can also be reduced.

[0036] In some embodiments of the present disclosure, referring to Figure 2As shown, the mounting structure 4 further includes a sealing ring 45 for providing sealing at the connection between the collecting member 1 and the mounting plate 41, and the support net 44 is connected within the sealing ring 45. In this way, by providing the sealing ring 45, the sealing performance and reliability of the connection between the collecting member 1 and the mounting plate 41 can be further ensured, thus avoiding the influence of gas leakage on the detection accuracy. Additionally, by connecting the support net 44 within the sealing ring 45, the space within the sealing ring 45 can be utilized to arrange the support net 44 and the waterproof and breathable membrane, which is beneficial for the compact design of the battery formation gas detection device.

[0037] In some embodiments of the present disclosure, referring to Figure 2 and Figure 3 as shown, the detection assembly 2 includes at least one of a pressure sensor 21, a temperature sensor 22, and a gas sensor 23. In this way, it is possible to simultaneously detect changes in the gas temperature, pressure, or gas type and concentration inside the battery, improve the comprehensiveness of gas detection, and improve the detection efficiency. Among them, the pressure sensor 21 can be a capacitive pressure sensor, and its working principle is that a capacitor composed of a metal film and a fixed electrode, and the metal film generates deformation under the influence of pressure, which will change the current value of the capacitor to generate an output signal. The temperature sensor 22 can be a thermistor-type temperature sensor, and its working principle is that the resistance value of the metal film changes linearly with temperature, and by measuring the resistance value, the actual working temperature inside the battery can be reflected. The gas sensor 23 can be a thermal conductivity gas sensor, and its working principle is that gases with different thermal conductivity have different heat conduction abilities to the thermistor to generate an output signal.

[0038] In addition, the temperature sensor 22 can be replaced with a thermistor semiconductor sensor, the pressure sensor 21 can be replaced with a piezoresistive pressure sensor, the gas sensor 23 can be replaced with an infrared sensor, etc. The detection assembly 2 can also include other sensors or detection devices capable of detecting gas parameters, and the present disclosure does not make specific limitations in this regard.

[0039] In some embodiments of the present disclosure, referring to Figure 1 and Figure 2 as shown, the collecting member 1 can be provided with a second opening 13 communicating with the collecting cavity 11. The battery formation gas detection device includes a connection structure 5, and the connection structure 5 is detachably connected to the second opening 13 and is used to communicate with the liquid injection hole 20 of the battery. In this way, one end of the connection structure 5 can communicate with the liquid injection hole 20 of the battery, and the other end can communicate with the second opening 13, so as to transport the gas inside the battery to the collecting cavity 11 through the liquid injection hole 20 for detection, ensuring the reliability during the gas transmission process. Among them, the connection structure 5 is detachably connected to the second opening 13, which is beneficial for the disassembly and assembly of the connection structure 5 and the collecting member 1. Here, the present disclosure does not limit the specific structure of the connection structure 5, and the present disclosure will be introduced in detail in the following embodiments.

[0040] Among them, in some embodiments, referring to Figure 2 As shown, a boss with an external thread can be welded at the liquid injection hole 20 of the battery. And, the communication structure 5 includes a first flange 52, a second flange 53, a third flange 54, and a connecting pipe 51. Among them, the first flange 52 can be configured as an in-thread ferrule of a flange plate, for sealing connection with the boss through threads. The second flange 53 and the third flange 54 can be configured as ferrule interfaces of a flange plate. Two ends of the connecting pipe 51 are respectively connected to the second flange 53 and the third flange 54, so that one end of the connecting pipe 51 can be hermetically connected to the first flange 52 by the second flange 53 through a first vacuum clamp 55 and a sealing ring 45, and the other end of the connecting pipe 51 can be hermetically connected to the second opening 13 of the collecting member 1 by the third flange 54 through a second vacuum clamp 56 and a sealing ring 45, thereby ensuring the reliability of the connection between the connecting pipe 51 and the liquid injection hole 20 and between the connecting pipe 51 and the second opening 13 of the collecting member 1, so as to realize the sealed communication between the liquid injection hole 20 and the second opening 13.

[0041] In some embodiments of the present disclosure, referring to Figure 1 and Figure 2 As shown, the collecting member 1 can be provided with a third opening 14 communicating with the collecting cavity 11, and a pressure relief valve 6 is installed on the third opening 14. In this way, by providing the pressure relief valve 6, overpressure events in the collecting cavity 11 can be prevented, damage to the detection component 2 caused by excessive air pressure in the collecting cavity 11 can be avoided, and the safety of the detection device is also ensured.

[0042] In some embodiments of the present disclosure, referring to Figure 2 As shown, the collecting member 1 can be provided with a fourth opening 15 communicating with the collecting cavity 11, and the fourth opening 15 is used to connect a functional component. By opening the fourth opening 15 to connect the functional component, the functional component can be set as a detection element for detecting the gas in the collecting cavity 11 or other elements for assisting detection. Among them, the fourth opening 15 can be sealed according to specific test requirements, or the functional component can be connected through the communication structure 5.

[0043] In some embodiments of the present disclosure, the functional component can be one of a pressure transmitter, a pressure gauge, and a vacuum pump. Among them, the pressure transmitter can convert the pressure signal of the gas in the collecting cavity 11 into a start signal or an electric signal to realize control and remote transmission to other devices. The pressure gauge can detect the pressure of the gas in the collecting cavity 11 to compare with the value of the pressure sensor 21 to check the accuracy of the pressure sensor 21. The vacuum pump can pump out gas molecules to reduce the gas pressure in the collecting cavity 11 so that the collecting cavity 11 reaches the required vacuum degree to meet the conditions for gas detection.

[0044] Next, referring to Figures 1 to 3As shown, this disclosure will introduce the specific usage process of the battery formation gas production detection device in detail in combination with the above specific embodiments. When detecting the gas produced during battery formation, the gas generated inside the battery is discharged from the liquid injection hole 20. At this time, both the gas and the volatile electrolyte discharged together with the gas can enter the collection chamber 11 through the connection structure 5 and flow to the waterproof breathable component 3. Since the waterproof breathable component 3 has waterproof property and can pass gas, the gas to be detected can pass through the waterproof breathable component 3 to reach the detection component 2, so that the pressure sensor 21, temperature sensor 22 and gas sensor 23 can detect the pressure, temperature, type and concentration of the gas. The volatile electrolyte will be blocked by the waterproof breathable component 3, avoiding contact with the detection component 2 and damaging the sensor, ensuring the accuracy of the detection by the pressure sensor 21, temperature sensor 22 and gas sensor 23.

[0045] The preferred embodiments of this disclosure have been described in detail above in conjunction with the accompanying drawings. However, this disclosure is not limited to the specific details in the above embodiments. Within the scope of the technical concept of this disclosure, various simple modifications can be made to the technical solutions of this disclosure, and these simple modifications all fall within the protection scope of this disclosure.

[0046] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, this disclosure will not separately describe various possible combination methods.

[0047] Furthermore, any combination can be made among various different embodiments of this disclosure as long as it does not violate the idea of this disclosure, and it should also be regarded as the content disclosed by this disclosure.

Claims

1. A battery formation gas generation detection device, characterized in that, Comprising: A collecting member provided with a collecting chamber for communicating with the liquid injection hole of the battery; A detection assembly disposed in the collecting chamber; And A waterproof and breathable member disposed in the collecting chamber and located upstream of the detection assembly.

2. The battery formation gas generation detection device according to claim 1, wherein The waterproof and breathable member is configured as a waterproof and breathable membrane.

3. The battery formation gas generation detection device according to claim 1 or 2, characterized in that The collecting member is provided with a first opening communicating with the collecting chamber. The battery formation gas production detection device includes a mounting structure that closes the first opening and is detachably connected to the collecting member. The detection assembly and the waterproof and breathable member are disposed on the mounting structure.

4. The battery formation gas generation detection device according to claim 3, wherein, The mounting structure includes a mounting plate and a clamp. The clamp is sleeved on the outer periphery of the collecting member and clamps the mounting plate and the waterproof and breathable member. The mounting plate covers the first opening, and the detection assembly is fixed to the inner side of the mounting plate.

5. The battery formation gas generation detection device according to claim 4, wherein The mounting plate is provided with positioning holes. The detection assembly is disposed on a circuit board, and a fastener is disposed between the circuit board and the mounting plate. The fastener is threadedly connected to the positioning holes.

6. The battery formation gas generation detection device according to claim 4, wherein, The clamp clamps a support net, and the waterproof and breathable membrane covers the support net.

7. The battery formation gas generation detection device according to claim 6, wherein, The mounting structure further includes a sealing ring for providing a seal at the connection between the collecting member and the mounting plate. The support net is connected within the sealing ring.

8. The battery formation gas generation detection device according to claim 1, characterized in that The detection assembly includes at least one of a pressure sensor, a temperature sensor, and a gas sensor.

9. The battery formation gas generation detection device according to claim 1, characterized in that The collecting member is provided with a second opening communicating with the collecting chamber. The battery formation gas production detection device includes a communicating structure that is detachably connected to the second opening and is used for communicating with the liquid injection hole of the battery.

10. The battery formation gas generation detection device according to claim 1, wherein, The collecting member is provided with a third opening communicating with the collecting chamber, and a pressure relief valve is installed on the third opening.

11. The battery formation gas generation detection device according to claim 1 or 8, characterized in that, The collecting member is provided with a fourth opening communicating with the collecting chamber, and the fourth opening is used for connecting a functional component.

12. The battery formation gas generation detection device according to claim 11, characterized in that, The functional component is one of a pressure transmitter, a pressure gauge, and a vacuum pump.

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