Device for measuring gas in battery

Abstract

The utility model provides a battery internal gas measuring device, and belongs to the technical field of batteries. The battery internal gas measuring device comprises a sealing element, a sampling needle head, a gas pressure sensor and a gas collector. The sealing element is used for being attached to the surface of the battery; the sampling needle head is used for sequentially puncturing the sealing element and the surface of the battery along a preset path so as to release gas in the battery; the gas pressure sensor is communicated with the sampling needle head and is used for measuring the gas pressure when the sampling needle head pierces the surface of the battery; the gas collector is used for being communicated with the sampling needle head to collect gas.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery internal gas measurement device. Background Art

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages in energy conservation and environmental protection. For electric vehicles, battery technology is an important factor in their development.

[0003] Batteries will produce a large amount of gas during charging and discharging and under certain storage conditions, causing the battery to swell and even catch fire and explode, which has a great impact on the safety performance of the battery. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the background technology. To this end, one object of the present application is to provide a battery internal gas measurement device to improve the measurement accuracy of the gas inside the battery.

[0005] The embodiment of the present application provides a battery internal gas measurement device, which includes a seal, a sampling needle, an air pressure sensor and a gas collector. The seal is used to adhere to the surface of the battery; the sampling needle is used to pierce the seal and the surface of the battery in sequence along a preset path to release the gas inside the battery; the air pressure sensor is connected to the sampling needle and is used to measure the gas pressure of the gas during the process of the sampling needle piercing the surface of the battery; the gas collector is used to connect to the sampling needle to collect the gas.

[0006] In the technical solution of the embodiment of the present application, the sampling needle pierces the seal and the battery surface along a preset path, so that the gas inside the battery is discharged through the sampling needle, and the gas pressure is measured by the pressure sensor, and the gas is collected by the gas collector, thereby realizing the pressure measurement and gas collection of the gas inside the battery. In addition, by attaching the seal to the surface of the battery, the probability of the battery failing to be airtight during the measurement of the gas inside the battery is reduced, and no additional space is introduced, which is conducive to the measurement of the gas pressure inside the battery and the collection of the gas inside the battery, and improves the measurement accuracy of the gas inside the battery.

[0007] In some embodiments, the battery internal gas measurement device includes a stopper, which is used to limit the maximum distance that the sampling needle penetrates into the battery. The stopper can control the maximum distance that the sampling needle penetrates into the battery, reducing the probability of safety problems such as short circuit caused by the sampling needle penetrating too far into the battery, thereby improving the safety of the process of measuring the gas inside the battery.

[0008] In some embodiments, the stopper includes a stopper plate and a stopper rod, the stopper rod is configured to move synchronously with the sampling needle, and the stopper plate is configured to abut against the stopper rod when the sampling needle penetrates the battery at a maximum distance along a preset path, so as to prevent the sampling needle from further penetrating the battery. By using the stopper plate and the stopper rod to limit the sampling needle, the stopper structure is simple and easy to implement.

[0009] In some embodiments, the seal is used to be attached to the explosion-proof valve of the battery. By attaching the seal to the explosion-proof valve of the battery, it is convenient to collect the gas inside the battery and measure the air pressure, making the measurement of the gas inside the battery more time-saving and labor-saving, and helping to improve efficiency.

[0010] In some embodiments, the sealing member is a sheet-like structure, and can completely cover the explosion-proof valve when attached to the explosion-proof valve. By making the sealing member completely cover the explosion-proof valve when attached to the explosion-proof valve, the probability of the explosion-proof valve rupturing and causing gas leakage when the sampling needle pierces the sealing member and the explosion-proof valve can be reduced, which helps to improve safety.

[0011] In some embodiments, the material of the sealing member includes rubber. By making the material of the sealing member include rubber, the manufacturing cost of the sealing member can be reduced, and the sealing effect of the sealing member can be improved.

[0012] In some embodiments, the battery internal gas measurement device further includes: a bottom plate for carrying the battery; and two clamps, which are disposed above the bottom plate and opposite to each other and are used to clamp the battery. The battery is clamped and fixed by the bottom plate and the two clamps, which effectively keeps the battery stable during gas measurement. At the same time, the device is suitable for internal gas measurement of batteries of different sizes, which greatly improves the practicality of the battery internal gas measurement device.

[0013] In some embodiments, the battery internal gas measurement device further comprises a slide rail, and the two clamps are connected to the bottom plate via the slide rail so that the distance between the two clamps can be adjusted. The two clamps are connected to the bottom plate via the slide rail so that the distance between the two clamps can be adjusted, making the structure of the battery internal gas measurement device simpler.

[0014] In some embodiments, the battery internal gas measurement device further comprises a switch valve disposed between the sampling needle and the gas collector. By disposing the switch valve between the sampling needle and the gas collector, the gas pressure inside the battery measured by the gas pressure sensor can be made more accurate.

[0015] In some embodiments, the battery internal gas measurement device further includes a driver for driving the sampling needle to move toward or away from the battery. The driver drives the sampling needle to move toward or away from the battery, so that the sampling needle can move in multiple directions, thereby improving the efficiency of the battery internal gas measurement device.

[0016] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0018] Figure 1 A schematic diagram of a battery internal gas measurement device according to some embodiments of the present application;

[0019] Figure 2 for Figure 1 Left view of

[0020] Figure 3 for Figure 1 A partial enlarged view of

[0021] Figure 4 Schematic diagram of the battery structure of some embodiments of the present application.

[0022] Description of reference numerals:

[0023] 1000. Battery internal gas measuring device;

[0024] 110, seal; 120, sampling needle; 130, air pressure sensor; 140, gas collector; 150, stopper; 151, stop plate; 152, stop rod; 160, bottom plate; 170, clamp; 171, slide rail; 180, switch valve; 190, driver;

[0025] 200. Battery; 201. Explosion-proof valve. DETAILED DESCRIPTION

[0026] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0028] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0029] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0030] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0035] There are many complex chemical reactions in the working process of the battery, and chemical reactions are very likely to produce gas. In addition, during the actual use of the battery, abuse often occurs, under which conditions it is easier to produce gas, causing the battery to swell and even catch fire and explode, which has a great impact on the safety performance of the battery. Therefore, it is particularly important to find the cause of battery failure due to bloating.

[0036] By detecting the gas pressure and gas composition inside the battery, it can help analyze the mechanism of electrode thickening, electrolyte consumption and other irreversible reactions inside the battery, assist in the development of better electrolyte formulas, electrode materials, and production processes, and provide data support for charging and discharging strategies and temperature.

[0037] In related technologies, when detecting the gas pressure and gas composition inside the battery, the battery needs to be modified to a certain extent, such as stripping off the sealing nails, etc., which deviates from the actual mass-produced battery state. In addition, the battery needs to go through multiple component transfer links in the process of connecting to the air pressure sensor. The more transfer links, the greater the probability of airtight failure of the battery, which in turn leads to abnormal gas composition of the collected gas. Excessively long connecting pipes will also introduce additional space, causing the gas to be diluted, affecting the detected gas pressure.

[0038] Based on this, the embodiment of the present application discloses a battery internal gas measurement device, in which the sampling needle pierces the seal and the battery surface along a preset path, so that the gas inside the battery is discharged through the sampling needle, and the gas pressure is measured by the pressure sensor, and the gas is collected by the gas collector, thereby realizing the pressure measurement and gas collection of the gas inside the battery. And by attaching the seal to the surface of the battery, the probability of the battery failing to be airtight during the measurement of the gas inside the battery is reduced, and no additional space is introduced, which is conducive to the gas pressure measurement and the collection of the gas inside the battery, and improves the measurement accuracy of the gas inside the battery.

[0039] The battery internal gas measuring device disclosed in the embodiment of the present application can be used, but is not limited to, to measure the gas production at different stages inside a lithium battery.

[0040] The present application embodiment provides a battery internal gas measurement device 1000, Figure 1 A schematic diagram of a battery internal gas measurement device according to some embodiments of the present application; Figure 2 for Figure 1 Left view of Figure 3 for Figure 1 A partial enlarged view of Figure 4 Schematic diagram of the battery structure of some embodiments of the present application. Figures 1 to 4 As shown, the battery internal gas measurement device 1000 includes a seal 110, a sampling needle 120, an air pressure sensor 130 and a gas collector 140. The seal 110 is used to adhere to the surface of the battery 200; the sampling needle 120 is used to pierce the seal 110 and the surface of the battery 200 in sequence along a preset path to release the gas inside the battery 200; the air pressure sensor 130 is connected to the sampling needle 120 and is used to measure the air pressure of the gas during the process of the sampling needle 120 piercing the surface of the battery 200; the gas collector 140 is used to communicate with the sampling needle 120 to collect the gas.

[0041] In an example, the material of the seal 110 may include a material with good ductility under pressure, such as rubber. The size of the seal 110 may match the surface area of ​​the battery 200, and the seal 110 may be fixed and pressed on the surface of the battery 200. The seal 110 may be attached to any position on the surface of the battery 200, such as the explosion-proof valve 201. The seal 110 is attached to the surface of the battery 200, which can improve the sealing of the battery 200 during the process of measuring the gas inside the battery 200.

[0042] In the example, the sampling needle 120 is used to pierce the surface of the seal 110 and the battery 200, one end of the needle is placed inside the battery 200, and the other end is connected to the gas collector 140. In order to ensure the safety of the sampling process, the sampling needle 120 can pierce the surface of the seal 110 and the battery 200 in sequence along a preset path at a slower speed, and the distance that the sampling needle 120 penetrates into the battery 200 can be controlled.

[0043] In the example, the air pressure sensor 130 is connected to the sampling needle 120, and displays the pressure to which the sampling needle 120 is subjected in the process of piercing the seal 110 and the surface of the battery 200. The pressure change of the air pressure sensor 130 can be used to determine whether the sampling needle 120 has pierced the surface of the battery 200. After piercing the surface of the battery 200, the movement of the sampling needle 120 can be stopped to prevent the sampling needle 120 from piercing too deep into the battery 200. In order to further improve safety, before measuring the gas inside the battery 200, the internal structure of the battery 200 can be tested and observed to determine the position where the sampling needle 120 pierces the surface of the battery 200 and the gap between the internal pole piece, and to limit the maximum distance that the sampling needle 120 can penetrate into the battery 200.

[0044] In the example, the air pressure sensor 130 can record the air pressure in the sampling needle 120 in real time, observe the state of the sampling needle 120 in the process of piercing the surface of the battery 200, and accurately determine whether the surface of the battery 200 is punctured by the change in pressure. When the surface of the battery 200 is punctured, the sampling needle 120 can be promptly controlled to stop further penetration, thereby improving the safety of the sampling process.

[0045] In the example, the gas collector 140 is connected to the sampling needle 120, and the gas inside the battery 200 can be collected in the gas collector 140 after being discharged through the sampling needle 120. In this way, the gas inside the battery 200 can be physically and chemically analyzed, and the test results such as the gas production, gas production components, and the proportion of each component of the battery 200 can be obtained, so that further performance analysis and improvement of the battery 200 can be carried out.

[0046] In the embodiment of the present application, the sampling needle 120 pierces the sealing member 110 and the surface of the battery 200 along a preset path, so that the gas inside the battery 200 is discharged through the sampling needle 120, and the gas pressure is measured by the gas pressure sensor 130, and the gas is collected by the gas collector 140, thereby realizing the gas pressure measurement and gas collection of the gas inside the battery 200. In addition, by attaching the sealing member 110 to the surface of the battery 200, the probability of the battery 200 failing to be airtight during the gas measurement inside the battery 200 is reduced, and no additional space is introduced, thereby facilitating the gas pressure measurement inside the battery 200 and the collection of the gas inside the battery 200, and improving the measurement accuracy of the gas inside the battery 200.

[0047] According to some embodiments of the present application, the battery internal gas measurement device 1000 may include a stopper 150 , and the stopper 150 is used to limit the maximum distance that the sampling needle 120 penetrates into the battery 200 .

[0048] In the example, when the sampling needle 120 penetrates the battery 200 too far, it may cause a short circuit or even a fire or other safety accidents. The maximum distance can be set by the gap between the position where the sampling needle 120 penetrates the surface of the battery 200 and the internal electrode of the battery 200. The maximum distance that the sampling needle 120 penetrates the battery 200 can be the distance between the position where the sampling needle 120 penetrates the surface of the battery 200 and the internal electrode of the battery 200.

[0049] In an example, the stopper 150 may limit the maximum distance that the sampling needle 120 penetrates into the interior of the battery 200 by preventing the sampling needle 120 from further penetrating into the interior of the battery 200 .

[0050] In the embodiment of the present application, the maximum distance that the sampling needle 120 penetrates into the interior of the battery 200 can be controlled by the limiter 150, thereby reducing the probability of safety problems such as short circuits caused by the sampling needle 120 penetrating too far into the interior of the battery 200, thereby improving the safety of the process of measuring the gas inside the battery 200.

[0051] According to some embodiments of the present application, the limiter 150 includes a limit plate 151 and a limit rod 152, the limit rod 152 is configured to move synchronously with the sampling needle 120, and the limit plate 151 is configured to abut against the limit rod 152 when the sampling needle 120 penetrates the interior of the battery 200 along a preset path at a maximum distance, so as to prevent the sampling needle 120 from further penetrating the interior of the battery 200.

[0052] In an example, the limiting rod 152 may be a limiting bolt. The moving direction and moving displacement of the limiting rod 152 may be the same as the moving direction and moving displacement of the sampling needle 120 .

[0053] In the example, the limit plate 151 may be an insulating plate, and the limit plate 151 may be located above the battery 200. The limit plate 151 may limit the movement of the limit rod 152. When the sampling needle 120 penetrates the battery 200 along the preset path at the maximum distance, the limit rod 152 will abut against the limit plate 151 and thus cannot continue to move along the preset path. Since the limit rod 152 is configured to move synchronously with the sampling needle 120, when the limit rod 152 cannot continue to move along the preset path, the sampling needle 120 cannot continue to move along the preset path, thereby preventing the sampling needle 120 from further penetrating the battery 200.

[0054] In the embodiment of the present application, the sampling needle 120 is limited by using the limiting plate 151 and the limiting rod 152 , so that the limiter 150 has a simple structure and is easy to implement.

[0055] According to some embodiments of the present application, the seal 110 is used to be attached to the explosion-proof valve 201 of the battery 200 .

[0056] In the example, the seal 110 is attached to the explosion-proof valve 201 of the battery 200. During the gas measurement process inside the battery 200, the seal 110 and the explosion-proof valve 201 can be sequentially pierced along a preset path using a needle. Since the explosion-proof valve 201 of the battery 200 will rupture when the pressure inside the battery 200 reaches a certain threshold, the area where the explosion-proof valve 201 is located is weaker in structural strength than other areas of the battery 200 housing, and the sampling needle 120 is easier to pierce.

[0057] In the embodiment of the present application, by attaching the seal 110 to the explosion-proof valve 201 of the battery 200, it is convenient to collect the gas inside the battery 200 and measure the air pressure, so that the measurement of the gas inside the battery 200 is more time-saving and labor-saving, which helps to improve efficiency.

[0058] According to some embodiments of the present application, the sealing member 110 is a sheet-like structure, and can completely cover the explosion-proof valve 201 when attached to the explosion-proof valve 201 .

[0059] In the example, when the sampling needle 120 pierces the explosion-proof valve 201, the explosion-proof valve 201 is prone to rupture, which may cause leakage of gas inside the battery 200. The seal 110 is a sheet-like structure, and when attached to the explosion-proof valve 201, it can completely cover the explosion-proof valve 201. Even if the explosion-proof valve 201 is ruptured, the seal 110 can prevent gas leakage, and the pressure measurement is more accurate, and the collected gas is more accurate. The explosion-proof valve 201 places the sheet-like seal 110 directly above the explosion-proof valve 201.

[0060] In the embodiment of the present application, by enabling the seal 110 to completely cover the explosion-proof valve 201 when attached to the explosion-proof valve 201, the probability of gas leakage caused by rupture of the explosion-proof valve 201 when the sampling needle 120 pierces the seal 110 and the explosion-proof valve 201 can be reduced, which helps to improve safety.

[0061] According to some embodiments of the present application, the material of the sealing element 110 includes rubber.

[0062] In the example, rubber, as a highly elastic polymer material with reversible deformation, is elastic at room temperature and can produce a large deformation under a very small external force, and can return to its original shape after the external force is removed.

[0063] Exemplarily, based on the compressive ductility of rubber and the sealing property of structural adhesive, the periphery of the seal 110 is sealed with structural adhesive. When a uniform external force is applied to the seal 110, the sampling needle 120 pierces the seal 110 and continues to gradually advance until it pierces the surface of the battery 200. The seal 110 tends to stretch and deform toward the sampling needle 120, and finally wraps the outer edge of the sampling needle 120, thereby effectively avoiding the leakage of gas inside the battery 200 and the air pressure measurement error of the gas inside the battery 200 by the air pressure sensor 130.

[0064] In the embodiment of the present application, by making the material of the seal 110 include rubber, the manufacturing cost of the seal 110 can be reduced, and at the same time, the sealing effect of the seal 110 can be improved.

[0065] According to some embodiments of the present application, the battery internal gas measurement device 1000 further includes: a bottom plate 160 for carrying the battery 200 ; and two clamps 170 , which are disposed above the bottom plate 160 and opposite to each other and are used to clamp the battery 200 .

[0066] In the example, the bottom plate 160 may be an insulating plate to ensure that the battery 200 is in a safe environment. The clamp 170 may be a clamping plate, the inner wall of which contacts the side wall of the battery 200, and the two clamping plates are arranged opposite to each other to clamp the battery 200, that is, the bottom plate 160 and the clamp 170 may realize the positioning of the battery 200 in the battery internal gas measurement device 1000.

[0067] In an example, the distance between the two clamps 170 can be adjusted so that batteries 200 of different sizes can be positioned and fixed.

[0068] In the embodiment of the present application, the battery 200 is clamped and fixed by the base plate 160 and the two clamps 170, so that the battery 200 can be effectively kept stable during gas measurement. At the same time, the device is suitable for internal gas measurement of batteries 200 of different sizes, which greatly improves the practicality of the battery internal gas measurement device 1000.

[0069] According to some embodiments of the present application, the battery internal gas measuring device 1000 further includes a slide rail 171 , and the two clamps 170 are connected to the bottom plate 160 via the slide rail 171 so that the distance between the two clamps 170 can be adjusted.

[0070] In the example, the two clamps 170 are connected to the bottom plate 160 via the slide rails 171, and the two clamps 170 can move on the bottom plate 160 via the slide rails 171, and the two clamps 170 can move closer to or farther from each other, which is conducive to the two clamps 170 being able to clamp batteries 200 of different specifications.

[0071] In addition, in this embodiment, in terms of structural setting, a plurality of positioning structures may be provided between the bottom plate 160 and the two clamps 170, and the positioning structures may be, for example, a stopper provided on the bottom plate 160 and a stopper bolt provided on the clamp 170, wherein the plurality of stopper bolts are arranged at intervals along the outer circumference of the clamp 170. Through the cooperation between the stopper and the stopper bolt, the spacing between the two clamps 170 is adjustable.

[0072] In the embodiment of the present application, the two clamps 170 are connected to the bottom plate 160 via the slide rails 171 so that the distance between the two clamps 170 can be adjusted, making the structure of the battery internal gas measuring device 1000 simpler.

[0073] According to some embodiments of the present application, the battery internal gas measurement device 1000 further includes a switch valve 180 disposed between the sampling needle 120 and the gas collector 140 .

[0074] In the example, a switch valve 180 is provided between the sampling needle 120 and the gas collector 140. When the air pressure sensor 130 measures the pressure of the gas inside the battery 200, the switch valve 180 is in a closed state. After the air pressure sensor 130 measures and obtains normal air pressure data, the switch valve 180 is opened, and the gas flows into the gas collector 140 due to the air pressure difference to achieve gas collection.

[0075] In the embodiment of the present application, by providing a switch valve 180 between the sample needle and the gas collector 140, the air pressure inside the battery 200 measured by the air pressure sensor 130 can be made more accurate.

[0076] According to some embodiments of the present application, the battery internal gas measurement device 1000 further includes a driver 190 for driving the sampling needle 120 to move toward or away from the battery 200 .

[0077] In the example, the driver 190 can be a manual driver, such as a hand wheel, and the sampling needle 120 can be driven to move toward or away from the battery 200 by twisting the hand wheel in different directions. The driver 190 can also be an electric driver, such as a servo motor, the operating speed of the servo motor is set in a slower speed range, and the distance of the needle penetration can be controlled by setting the time, thereby improving the safety of the gas collection process inside the battery 200.

[0078] In the embodiment of the present application, the sampling needle 120 is driven by the driver 190 to move toward or away from the battery 200 , so that the sampling needle 120 can move in multiple directions, thereby improving the efficiency of the battery internal gas measurement device 1000 .

[0079] The technical solution of the present application is described below by means of a specific embodiment. Figures 1 to 4 As shown,

[0080] The battery internal gas measurement device 1000 includes a seal 110, a sampling needle 120, an air pressure sensor 130 and a gas collector 140. The seal 110, the material of the seal 110 includes rubber, the seal 110 is a sheet structure, and can completely cover the explosion-proof valve 201 when attached to the explosion-proof valve 201. The sampling needle 120 is used to pierce the seal 110 and the surface of the battery 200 in sequence along a preset path to release the gas inside the battery 200. The air pressure sensor 130 is connected to the sampling needle 120 and is used to measure the air pressure of the gas during the process of the sampling needle 120 piercing the surface of the battery 200. The gas collector 140 is used to communicate with the sampling needle 120 to collect gas.

[0081] The battery internal gas measuring device 1000 may include a limiter 150, which includes a limiter plate 151 and a limiter rod 152. The limiter rod 152 is configured to move synchronously with the sampling needle 120, and the limiter plate 151 is configured to abut against the limiter rod 152 when the sampling needle 120 penetrates the interior of the battery 200 along a preset path at a maximum distance, so as to prevent the sampling needle 120 from further penetrating the interior of the battery 200.

[0082] The battery internal gas measuring device 1000 further includes a bottom plate 160 and a slide rail 171. The bottom plate 160 is used to carry the battery 200. Two clamps 170 are arranged above the bottom plate 160 and opposite to each other, and are used to clamp the battery 200. The two clamps 170 are connected to the bottom plate 160 through the slide rail 171 so that the distance between the two clamps 170 can be adjusted.

[0083] The battery internal gas measuring device 1000 further includes a switch valve 180 disposed between the sampling needle 120 and the gas collector 140 .

[0084] The battery internal gas measurement device 1000 further includes a driver 190 for driving the sampling needle 120 to move toward or away from the battery 200 .

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery internal gas measuring device, characterized in that: include: A sealing member (110) for attaching to a surface of a battery (200); A sampling needle (120) is used to sequentially pierce the sealing member (110) and the surface of the battery (200) along a preset path to release the gas inside the battery (200); an air pressure sensor (130), connected to the sampling needle (120), and used to measure the air pressure of the gas during the process of the sampling needle (120) piercing the surface of the battery (200); A gas collector (140) is used to communicate with the sampling needle (120) to collect the gas.

2. The device according to claim 1, characterized in that The device comprises a stopper, and the stopper is used to limit the maximum distance that the sampling needle (120) penetrates into the interior of the battery (200).

3. The device according to claim 2, characterized in that The limiter comprises a limit plate (151) and a limit rod (152); the limit rod (152) is configured to move synchronously with the sampling needle (120); and the limit plate (151) is configured to abut against the limit rod (152) when the sampling needle (120) penetrates into the interior of the battery (200) along the preset path at the maximum distance, so as to prevent the sampling needle (120) from further penetrating into the interior of the battery (200).

4. The device according to any one of claims 1 to 3, characterized in that The sealing member (110) is used for being attached to the explosion-proof valve (201) of the battery (200).

5. The device according to claim 4, characterized in that The sealing member (110) is a sheet-like structure, and when attached to the explosion-proof valve (201), it is able to completely cover the explosion-proof valve (201).

6. The device according to any one of claims 1 to 5, characterized in that The material of the sealing member (110) includes rubber.

7. The device according to any one of claims 1 to 6, characterized in that The device also includes: A bottom plate (160) for carrying the battery (200); Two clamps (170) are arranged above the bottom plate (160) and opposite to each other, and are used to clamp the battery (200).

8. The device according to claim 7, characterized in that The device further comprises a slide rail (171), and the two clamps are connected to the base plate (160) via the slide rail (171), so that the distance between the two clamps (170) can be adjusted.

9. The device according to any one of claims 1 to 8, characterized in that The device further comprises a switch valve (180) arranged between the sampling needle (120) and the gas collector.

10. The device according to any one of claims 1 to 9, characterized in that The device also includes a driver (190) for driving the sampling needle (120) to move toward or away from the battery (200).

Images