Cylindrical battery charging and discharging produced gas collecting device

Abstract

The invention relates to the technical field of battery internal gas collection, and provides a cylindrical battery charging and discharging produced gas collection device which comprises a fixing base, a supporting frame, a gas collection sealing unit and a charging and discharging probe unit, the gas collection sealing unit comprises a gas collection head, and a gas-liquid mixing channel and a gas channel which are arranged at an angle to each other are formed in the gas collection head; the gas-liquid mixing channel is hermetically communicated with the interior of the battery through a connector, and the gas channel is connected with a gas pressure meter or gas analysis equipment through a gas outlet; the charge-discharge probe unit is adapted to provide a discharge current or a detection voltage to the battery. The gas generation condition in the battery can be monitored in real time in the charging and discharging process of the battery, the working condition in the battery is maintained, and a battery development engineer can master the real condition in the working process of the battery more accurately; meanwhile, due to the arrangement of gas-liquid separation, gas collection is facilitated, the occupied space of a gas channel is small, the gas production pressure and the gas production rate in the battery can be more accurately measured, and the experiment accuracy is improved.

Description

Technical Field

[0001] The invention relates to the technical field of battery internal gas collection, and in particular to a cylindrical battery charging and discharging gas collection device. Background Art

[0002] In recent years, the new energy industry has flourished. In the battery industry, lithium batteries and sodium batteries have developed rapidly. At present, during the use of these new energy batteries, chemical / electrochemical decomposition of electrode materials or electrolytes will more or less produce gas, which often accelerates the failure of the battery, resulting in extremely high maintenance costs and safety hazards. Therefore, analyzing the gas generation problem during battery charging and discharging is an effective means to improve battery reliability and service life.

[0003] In the relevant technical field, the existing battery gas collection devices all use sealed cavities to contain batteries, and the generated gas first enters the cavity space, and then enters the detection room or gas storage room through other means. This method of collecting gas is likely to damage the working environment inside the battery; at the same time, due to the compressibility of gas, the measured gas production is not accurate; and it is impossible to dynamically measure the gas production status of the battery during the charging and discharging process. In other words, the existing battery gas collection devices cannot truly reflect the gas production behavior of the battery, resulting in inaccurate research results. Summary of the invention

[0004] The present invention provides a cylindrical battery charging and discharging gas collection device, which is used to solve the defect that the existing battery gas collection devices in the prior art cannot truly reflect the gas production behavior of the battery, resulting in inaccurate research results. The present application can monitor the gas production inside the battery in real time during the battery charging and discharging process, maintain the internal working conditions of the battery, and help battery development engineers to more accurately grasp the actual situation of the battery working process; at the same time, the gas-liquid separation setting is conducive to gas collection, and the gas channel occupies a small space, which can more accurately measure the gas production pressure and gas production inside the battery, thereby improving the accuracy of the experiment.

[0005] The present invention provides a cylindrical battery charging and discharging gas collection device, comprising: Fixed seat; A support frame, the support frame having a connecting end and a free end, the connecting end is connected to the fixing seat, the free end extends along the height direction, and a battery placement position is formed between the connecting end and the free end; A gas collecting and sealing unit, the gas collecting and sealing unit is connected to the support frame and is located on the free end, the gas collecting and sealing unit includes a gas collecting head, the gas collecting head has a gas-liquid mixing channel and a gas channel arranged at an angle to each other, the gas-liquid mixing channel extends in the height direction, the gas collecting head also has a connecting port and a gas outlet, the connecting port is arranged toward the battery placement position, the gas-liquid mixing channel is in sealed communication with the interior of the battery through the connecting port, and the gas channel is connected to a barometer or a gas analysis device through the gas outlet; A charge and discharge probe unit is disposed on the fixing seat and the gas collecting and sealing unit respectively, and is suitable for providing a discharge current or a detection voltage to the battery.

[0006] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the gas collection sealing unit also includes a hollow bolt, a gas docking channel is provided in the hollow bolt, the first end of the hollow bolt extends into the gas channel from the gas outlet to connect the gas docking channel with the gas-liquid mixing channel, and the first end of the hollow bolt protrudes from the gas-liquid mixing channel, and the second end of the hollow bolt is used to connect with the gas outlet and the barometer or gas analysis equipment.

[0007] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the gas collecting and sealing unit also includes an adjusting support and an elastic member, the adjusting support is installed on the free end of the support frame, the gas collecting head is connected to the side of the adjusting support facing the battery, the elastic member is sleeved on the gas collecting head, and the elastic member abuts between the gas collecting head and the adjusting support.

[0008] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the adjustment support includes a connecting plate, a movable plate and a spiral push rod, the connecting plate is fixedly connected to the support frame, the movable plate is arranged on the side of the connecting plate facing the battery placement position, one end of the spiral push rod passes through the connecting plate and is connected to the movable plate, the spiral push rod is suitable for adjusting the distance between the connecting plate and the movable plate, and the gas collecting head is clamped on the movable plate by a set screw.

[0009] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the charging and discharging probe unit includes a positive probe and a negative probe, the positive probe is arranged on the side of the fixing seat facing the battery placement position, and the negative probe is arranged on the side of the movable plate facing the battery placement position.

[0010] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the fixing seat includes a seat body and an upper cover, a accommodating cavity is formed between the seat body and the upper cover, the upper cover is arranged on a boss facing the battery placement position, one of the positive pole probe or the negative pole probe in the charging and discharging probe unit is retractably arranged on the boss, and the power line and signal line of the positive pole probe or the negative pole probe are accommodated in the accommodating cavity.

[0011] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the support frame includes at least two U-shaped support rods, the open ends of the two U-shaped support rods are connected to the fixing seat, and the bent ends of the U-shaped support rods are connected to the gas collecting and sealing unit.

[0012] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the cylindrical battery charging and discharging gas collection device also includes at least two battery clamp units, the two battery clamp units are relatively arranged on both sides of the battery placement position, the battery clamp is movably connected to the support frame along the height direction, and the battery clamp module is suitable for clamping the battery in the battery placement position.

[0013] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the battery clamp unit includes a push rod, a slider and a clamp block, the slider is slidably mounted on the support frame along the height direction, the push rod is passed through the slider, and the clamp block is provided on the end of the push rod close to the battery, and the push rod is suitable for adjusting the distance between the clamp block and the slider.

[0014] According to a cylindrical battery charging and discharging gas collection device provided by the present invention, the clamping block has a first clamping surface and a second clamping surface placed toward the battery, and the first clamping surface and the second clamping surface are arranged at an obtuse angle.

[0015] The present application arranges a charge and discharge probe unit on a fixed seat and a gas collecting and sealing unit, so as to monitor the gas generation inside the battery in real time during the charge and discharge process, maintain the internal working condition of the battery, and help battery development engineers to more accurately grasp the actual situation of the battery during operation; at the same time, a gas-liquid mixing channel and a gas channel are formed inside the gas collecting head at an angle to each other, and the gas-liquid mixing channel extends in the height direction to facilitate the gas-liquid separation, which can effectively prevent the electrolyte from overflowing and enable the electrolyte to flow back, which is helpful for gas collection; through the connection setting of the connecting port, the battery probe can be integrated on the outside of the gas collecting and sealing unit, and will not be contaminated and corroded by the electrolyte or gas; and the gas channel occupies a small space, so it can more accurately measure the gas production pressure and gas production inside the battery, thereby improving the accuracy of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of an embodiment of a cylindrical battery charging and discharging gas collection device provided by the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure of a medium cylindrical battery charging and discharging gas collection device equipped with a battery.

[0019] Figure 3 yes Figure 1 Schematic diagram of the structure of the CIMC sealing unit.

[0020] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0021] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0022] Reference numerals: 10. Cylindrical battery charging and discharging gas collection device; 100, fixed seat; 110, seat body; 120, upper cover; 121, boss; 130, accommodating cavity; 200, support frame; 210, connection end; 220, free end; 300, battery placement; 400, gas collection sealing unit; 410, gas collection head; 411, gas-liquid mixing channel; 412, gas channel; 413, connection port; 414, gas outlet; 420, sealing ring; 430, hollow bolt; 431, gas docking channel; 440, adjustment support; 441, connection plate; 442, movable plate; 443, screw push rod; 444, set screw; 450, elastic member; 500, charge and discharge probe unit; 510, positive electrode probe; 520, negative electrode probe; 600, battery clamp unit; 610, push rod; 620, slider; 630, clamp block; 631, first clamping surface; 632, second clamping surface; 20.Battery. DETAILED DESCRIPTION

[0023] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0024] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0025] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0026] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0027] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0028] Combine the following Figures 1 to 5 , the fully automatic cleaning and fractionation probe device provided by the embodiment of the present invention is described in detail through specific embodiments and application scenarios.

[0029] like Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a cylindrical battery charge and discharge gas collection device 10, which includes a fixed seat 100, a support frame 200, a gas collection sealing unit 400 and a charge and discharge probe unit 500, the support frame 200 has a connecting end 210 and a free end 220, the connecting end 210 is connected to the fixed seat 100, the free end 220 extends along the height direction, and a battery 20 placement position 300 is formed between the connecting end 210 and the free end 220; the gas collection sealing unit 400 is connected to the support frame 200 and is located on the free end 220, the gas collection sealing unit 400 includes a gas collection head 410, and the inside of the gas collection head 410 is formed There are a gas-liquid mixing channel 411 and a gas channel 412 arranged at an angle to each other, the gas-liquid mixing channel 411 extends in the height direction, the gas collecting head 410 also has a connecting port 413 and an air outlet 414, the connecting port 413 is arranged toward the battery 20 placement position 300, the gas-liquid mixing channel 411 is connected to the internal seal of the battery 20 through the connecting port 413, and the gas channel 412 is connected to a barometer or a gas analysis device through the air outlet 414; the charging and discharging probe unit 500 is respectively arranged on the fixing seat 100 and the gas collecting sealing unit 400, and the charging and discharging probe unit 500 is suitable for providing a discharge current or a detection voltage to the battery 20.

[0030] The fixing base 100 is the foundation of the entire device, providing a stable support platform for other components (such as the support frame 200, the gas collection and sealing unit 400, etc.), ensuring the overall stability of the device during the test. The fixing base 100 ensures that the entire device will not shake or tilt during the experiment, and provides a solid platform for the placement and operation of the battery 20.

[0031] The connection end 210 of the support frame 200 is tightly connected to the fixing seat 100 to ensure the stability of the structure; the free end 220 extends in the height direction to support the gas collection sealing unit 400 and form a battery 20 placement position 300. The battery 20 placement position 300 formed between the connection end 210 and the free end 220 ensures that the battery 20 can be correctly placed and kept stable, which is convenient for charging, discharging and gas collection operations.

[0032] The gas collection and sealing unit 400 is connected to the free end 220 of the support frame 200, and is used to collect and analyze the gas generated inside the battery 20. The gas collection and sealing unit 400 fits tightly with the top of the battery 20 to achieve a sealed connection to prevent the gas and electrolyte inside the battery 20 from leaking during the test.

[0033] A gas-liquid mixing channel 411 and a gas channel 412 are formed inside the gas collecting head 410. The gas-liquid mixing channel 411 extends in the height direction, which is conducive to gas-liquid separation. The design of the gas-liquid mixing channel 411 allows the gas and liquid to be effectively separated, and the gas channel 412 ensures that the pure gas after separation can be smoothly exported. The gas is guided to the gas outlet 414 through the gas channel 412, and the electrolyte flows back to the inside of the battery 20 by gravity.

[0034] The connection port 413 is disposed toward the battery 20 placement position 300, and is sealed and connected to the inside of the battery 20 through the connection port 413, ensuring that the gas can smoothly enter the gas collecting head 410.

[0035] Specifically, the gas collection unit can be sealed and connected to the battery 20 through a sealing ring 420. The sealing ring 420 can be made of fluororubber or other materials to avoid corrosion by the electrolyte. It is embedded in the connection port 413 to play a sealing role.

[0036] The gas outlet 414 of the gas collecting head 410 is connected to an external barometer or gas analysis equipment to collect and export the gas generated inside the battery 20. This helps to monitor the gas generation of the battery 20 in real time during the charging and discharging process.

[0037] The gas path in the gas collecting head 410 takes up little space, and can more accurately measure the gas pressure and gas volume inside the battery 20. The setting of the gas collecting head 410 allows the probe to be integrated outside the gas collecting sealing unit 400, without being contaminated and corroded by the electrolyte and gas.

[0038] The charge and discharge probe unit 500 is respectively arranged on the fixing seat 100 and the gas collecting and sealing unit 400, and can monitor the voltage and provide the current in real time during the charge and discharge process of the battery 20. This helps to understand the working state and performance of the battery 20.

[0039] The probe takes into account factors such as current carrying capacity, corrosion resistance and voltage detection accuracy to ensure the accuracy and reliability of the test. At the same time, the position layout of the probe is reasonable to avoid interference with the gas-liquid mixing channel 411 and the gas channel 412.

[0040] The present application sets a charge and discharge probe unit 500 on the fixing seat 100 and the gas collecting and sealing unit 400, so as to monitor the gas generation inside the battery 20 in real time during the charge and discharge process of the battery 20, maintain the internal working condition of the battery 20, and help the battery 20 development engineers to more accurately grasp the actual situation of the battery 20 during the working process; at the same time, the interior of the gas collecting head 410 is formed with a gas-liquid mixing channel 411 and a gas channel 412 arranged at an angle to each other, and the gas-liquid mixing channel 411 extends in the height direction to facilitate the gas-liquid separation, which can effectively prevent the electrolyte from overflowing and enable the electrolyte to flow back, which is helpful for gas collection; through the connection setting of the connecting port 413, the probe of the battery 20 can be integrated on the outside of the gas collecting and sealing unit 400, and will not be contaminated and corroded by the electrolyte or gas; and the gas channel 412 occupies a small space, and can more accurately measure the gas production pressure and gas production inside the battery 20, thereby improving the accuracy of the experiment.

[0041] Reference Figures 3 to 5 In some embodiments of the present invention, the gas collecting sealing unit 400 also includes a hollow bolt 430, a gas docking channel 431 is provided in the hollow bolt 430, the first end of the hollow bolt 430 extends from the gas outlet 414 into the gas channel 412 to connect the gas docking channel 431 with the gas-liquid mixing channel 411, and the first end of the hollow bolt 430 protrudes from the gas-liquid mixing channel 411, and the second end of the hollow bolt 430 is used to connect with the gas outlet 414 and a barometer or a gas analysis device.

[0042] It is understandable that a gas docking channel 431 is provided inside the hollow bolt 430 for connecting the internal gas-liquid mixing channel 411 and the external barometer or gas analysis equipment. The first end of the hollow bolt 430 extends into the gas channel 412 through the gas outlet 414, and connects the gas docking channel 431 with the gas-liquid mixing channel 411. The second end of the hollow bolt 430 is used to connect with an external barometer or gas analysis equipment. The first end of the hollow bolt 430 protrudes from the gas-liquid mixing channel 411, which can effectively prevent the electrolyte from entering the gas channel 412. Since the electrolyte is heavier than the gas, the protruding part can prevent the electrolyte from flowing out with the gas, thereby achieving a better gas-liquid separation effect and ensuring the accuracy of the measurement data. At the same time, the second end of the hollow bolt 430 is simply and conveniently connected to the external equipment, which is convenient for the experimenter to connect or disconnect the barometer or gas analysis equipment at any time, thereby improving the flexibility and convenience of the experimental operation.

[0043] Reference Figures 3 to 5In some embodiments of the present invention, the gas collecting sealing unit 400 also includes an adjusting support 440 and an elastic member 450. The adjusting support 440 is installed on the free end 220 of the support frame 200. The gas collecting head 410 is connected to the side of the adjusting support 440 facing the battery 20. The elastic member 450 is sleeved on the gas collecting head 410, and the elastic member 450 is abutted between the gas collecting head 410 and the adjusting support 440.

[0044] It is understandable that the adjustment support 440 is mounted on the free end 220 of the support frame 200, providing a stable installation foundation for the gas collecting head 410. In this way, the gas collecting head 410 can be more stably connected to the device to ensure that it will not be displaced due to vibration or external force during the test process.

[0045] The adjustment support 440 is suitable for fine-tuning the position of the gas collecting head 410. Since different types of cylindrical batteries 20 may have different heights and sizes, the contact position and sealing effect between the gas collecting head 410 and the top of the battery 20 can be easily adjusted by adjusting the support 440 to ensure the accuracy and reliability of the test.

[0046] The elastic member 450 is mounted on the gas collecting head 410 and abuts between the gas collecting head 410 and the adjusting support 440. The elastic member 450 can play a buffering role during the downward pressure of the adjusting support 440, and the strength is controlled to be able to withstand the air pressure value of 1.1MPa, which can effectively control the downward pressure; at the same time, it can also play a role of constant value pressure relief when the air path is closed to measure the closed air pressure inside the battery 20, preventing the battery 20 from being over-pressured and causing safety risks, thereby ensuring safety during the test.

[0047] In some embodiments of the present invention, the adjustment support 440 includes a connecting plate 441, a movable plate 442 and a screw push rod 443. The connecting plate 441 is fixedly connected to the support frame 200. The movable plate 442 is arranged on the side of the connecting plate 441 facing the battery 20 placement position 300. One end of the screw push rod 443 passes through the connecting plate 441 and is connected to the movable plate 442. The screw push rod 443 is suitable for adjusting the distance between the connecting plate 441 and the movable plate 442. The gas collecting head 410 is clamped on the movable plate 442 by a set screw 444.

[0048] It can be understood that the connecting plate 441 is a bridge between the adjusting support 440 and the support frame 200, and it is tightly combined with the support frame 200 through a fixed connection (such as bolts, welding, etc.) to ensure the overall stability of the adjusting support 440. The connecting plate 441 provides a stable supporting platform for the movable plate 442 and the screw push rod 443, so that they can be moved and adjusted within a predetermined range.

[0049] The movable plate 442 is located on the side of the battery 20 placement position 300 and is used to install the gas collecting head 410. The gas collecting head 410 is clamped on the movable plate 442 by the set screw 444, and the gas collecting head 410 is prevented from rotating. The movable plate 442 can move relative to the connecting plate 441 under the action of the screw push rod 443, thereby changing the spacing between the connecting plate 441 and the movable plate 442. This spacing adjustment function allows the gas collecting head 410 to be more accurately close to or away from the top of the battery 20 to adapt to different models of cylindrical batteries 20.

[0050] The screw push rod 443 is used to adjust the distance between the connecting plate 441 and the movable plate 442 . The position of the movable plate 442 can be accurately adjusted by rotating the screw push rod 443 , thereby adjusting the distance between the gas collecting head 410 and the battery 20 .

[0051] The design of the adjustment support 440 enables the gas collection and sealing unit 400 to more flexibly adapt to the testing requirements of different types of cylindrical batteries 20. By rotating the spiral push rod 443, the distance between the gas collection head 410 and the top of the battery 20 can be accurately adjusted to ensure that the gas collection head 410 can fit tightly on the top of the battery 20 to prevent leakage of gas and electrolyte.

[0052] Of course, in some embodiments, the adjustment support 440 may also include a sliding block, which is mounted on the support frame 200 and connected to the movable plate. In this way, the moving path of the movable plate can be accurately positioned by sliding quickly, thereby improving the overall stability of the device while also improving the overall matching accuracy of the device.

[0053] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the charge and discharge probe unit 500 includes a positive probe 510 and a negative probe 520. The positive probe 510 is arranged on the side of the fixing seat 100 facing the battery 20 placement position 300, and the negative probe 520 is arranged on the side of the movable plate 442 facing the battery 20 placement position.

[0054] It is understandable that the charge and discharge probe unit 500 is divided into two positive and negative electrodes. The positive electrode probe 510 can be fixed to the center of the upper part of the fixing seat 100 by screws, with the top pin facing upward and the tail connected to the power line and the signal line. The negative electrode probe 520 can be fixed to the movable plate 442 of the gas collection sealing unit 400 by screws, close to the gas collection head 410. The main function of the charge and discharge probe unit 500 is to provide charge and discharge current and detect the voltage of the battery 20.

[0055] In some embodiments of the present invention, the fixing base 100 includes a base body 110 and an upper cover 120, and a accommodating cavity 130 is formed between the base body 110 and the upper cover 120. The upper cover 120 is arranged on a boss 121 on the side facing the battery 20 placement position 300. One of the positive pole probe 510 or the negative pole probe 520 in the charging and discharging probe unit 500 is retractably arranged on the boss 121, and the power line and signal line of the positive pole probe 510 or the negative pole probe 520 are accommodated in the accommodating cavity 130.

[0056] It is understandable that the fixing seat 100 includes a seat body 110 and an upper cover 120, and a receiving cavity 130 is formed between the two to protect the power line and signal line at the tail of the positive probe 510. The upper cover 120 is provided with a boss 121 around the positive probe 510, which is lower than the probe and can be flush after the probe is compressed. The boss 121 serves to provide a positioning platform for the battery 20 to prevent the battery 20 from being over-pressed and damaging the positive probe 510.

[0057] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the support frame 200 includes at least two U-shaped support rods, the open ends of the two U-shaped support rods are connected to the fixing seat 100, and the bent ends of the U-shaped support rods are connected to the gas collecting sealing unit 400.

[0058] It is understandable that the support frame 200 can be two U-shaped support rods or U-shaped tubes, and of course can also be multiple or single, which is not particularly limited here. The opening of the U-shaped support rod passes through the four corresponding through holes of the upper cover 120 downward, and is supported in the corresponding mounting groove of the base body 110. The tops of the two U-shaped support rods are fixed to the gas collection and sealing unit 400 to form a stable and reliable structure.

[0059] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the cylindrical battery charging and discharging gas collection device 10 also includes at least two battery clamp units 600, which are relatively arranged on both sides of the battery 20 placement position 300, and the battery 20 clamp is movably connected to the support frame 200 along the height direction. The battery 20 clamp module is suitable for clamping the battery 20 in the battery 20 placement position 300.

[0060] It is understandable that the main function of the battery clamp unit 600 is to clamp the cylindrical battery 20 placed in the battery 20 placement position 300 to prevent the battery 20 from moving or falling off due to vibration, gas generation, etc. during the test process. Stable contact between the battery 20 and the charge and discharge probe and the gas collection and sealing unit 400 is ensured, thereby improving the accuracy and reliability of the test.

[0061] The two battery clamp units 600 are relatively disposed on both sides of the battery 20 placement position 300, so that clamping force can be applied to the battery 20 from both sides at the same time, forming a more balanced and stable clamping effect.

[0062] The battery 20 clamp is movably connected to the support frame 200 in the height direction, so that the battery 20 clamp can be adjusted according to cylindrical batteries 20 of different heights and sizes. By adjusting the height position of the battery 20 clamp, it can be ensured that they can accurately clamp the battery 20 and adapt to the testing requirements of different models of batteries 20.

[0063] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the battery clamp unit 600 includes a push rod 610, a slider 620 and a clamp block 630. The slider 620 is slidably mounted on the support frame 200 along the height direction. The push rod 610 is passed through the slider 620. A clamp block 630 is provided on one end of the push rod 610 that is placed close to the battery 20. The push rod 610 is suitable for adjusting the distance between the clamp block 630 and the slider 620.

[0064] It is understandable that the push rod 610 is the main driving component of the battery clamp unit 600. The push rod 610 is inserted into the slider 620 and can be adjusted within a certain range. One end of the push rod 610 is connected or fixed with a clamping block 630 for clamping the battery 20; the other end can be connected with an operating handle, a motor or other driving device for controlling the push rod 610.

[0065] The slider 620 is slidably mounted on the support frame 200 in the height direction, so that the battery clamp unit 600 can move freely in the vertical direction to accommodate cylindrical batteries 20 of different heights. At the same time, the slider 620 also provides a mounting platform for the push rod 610 and the clamp block 630, ensuring the stability of the entire clamp unit.

[0066] The clamp block 630 is a component of the battery clamp unit 600 that directly contacts the battery 20. It usually has a groove or clamping surface that matches the shape of the battery 20 to ensure a secure clamping of the battery 20. The clamp block 630 is connected to the slider 620 via the push rod 610. When the push rod 610 moves, the clamp block 630 moves accordingly, thereby changing the clamping force between the battery 20 and the clamp block 630.

[0067] Reference Figure 1 and Figure 2 In some embodiments of the present invention, the clamping block 630 has a first clamping surface 631 and a second clamping surface 632 placed toward the battery 20, and the first clamping surface 631 and the second clamping surface 632 are arranged at an obtuse angle.

[0068] It is understandable that in this embodiment, the first clamping surface 631 and the second clamping surface 632 are set at an obtuse angle on the clamping block 630, so that the clamping block 630 can not only adapt to cylindrical batteries 20 of different diameters, but also ensure the stability of the battery 20 during the experiment. At the same time, the obtuse angle setting enables the clamping block 630 to better fit the cylindrical surface of the battery 20, prevent damage to the battery 20 during the clamping process, and improve the reliability of the clamping.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A cylindrical battery charging and discharging gas collection device, characterized in that: include: Fixed seat; A support frame, the support frame having a connecting end and a free end, the connecting end is connected to the fixing seat, the free end extends along the height direction, and a battery placement position is formed between the connecting end and the free end; A gas collecting and sealing unit, the gas collecting and sealing unit is connected to the support frame and is located on the free end, the gas collecting and sealing unit includes a gas collecting head, the gas collecting head has a gas-liquid mixing channel and a gas channel arranged at an angle to each other, the gas-liquid mixing channel extends in the height direction, the gas collecting head also has a connecting port and a gas outlet, the connecting port is arranged toward the battery placement position, the gas-liquid mixing channel is in sealed communication with the interior of the battery through the connecting port, and the gas channel is connected to a barometer or a gas analysis device through the gas outlet; A charge and discharge probe unit is disposed on the fixing seat and the gas collecting and sealing unit respectively, and is suitable for providing a discharge current or a detection voltage to the battery.

2. The cylindrical battery charging and discharging gas collection device according to claim 1, characterized in that: The gas collecting and sealing unit also includes a hollow bolt, in which a gas docking channel is provided, and the first end of the hollow bolt extends from the gas outlet into the gas channel to connect the gas docking channel with the gas-liquid mixing channel, and the first end of the hollow bolt protrudes from the gas-liquid mixing channel, and the second end of the hollow bolt is used to connect to the gas outlet and the barometer or gas analysis equipment.

3. The cylindrical battery charging and discharging gas collection device according to claim 2, characterized in that: The gas collecting and sealing unit also includes an adjusting support and an elastic member. The adjusting support is installed at the free end of the support frame, the gas collecting head is connected to the side of the adjusting support facing the battery, the elastic member is sleeved on the gas collecting head, and the elastic member is abutted between the gas collecting head and the adjusting support.

4. The cylindrical battery charging and discharging gas collection device according to claim 3, characterized in that: The adjustment support includes a connecting plate, a movable plate and a spiral push rod. The connecting plate is fixedly connected to the support frame. The movable plate is arranged on the side of the connecting plate facing the battery placement position. One end of the spiral push rod passes through the connecting plate and is connected to the movable plate. The spiral push rod is suitable for adjusting the distance between the connecting plate and the movable plate. The gas collecting head is clamped on the movable plate by a set screw.

5. The cylindrical battery charge and discharge gas collection device according to claim 4, characterized in that: The charge and discharge probe unit comprises a positive probe and a negative probe. The positive probe is arranged on a side of the fixing seat facing the battery placement position, and the negative probe is arranged on a side of the movable plate facing the battery placement position.

6. The cylindrical battery charge and discharge gas collection device according to any one of claims 1 to 5, characterized in that: The fixing seat includes a seat body and an upper cover, a receiving cavity is formed between the seat body and the upper cover, the upper cover is arranged on a boss facing the battery placement position, one of the positive pole probe or the negative pole probe in the charging and discharging probe unit is retractably arranged on the boss, and the power line and signal line of the positive pole probe or the negative pole probe are accommodated in the receiving cavity.

7. The cylindrical battery charge and discharge gas collection device according to any one of claims 1 to 5, characterized in that: The support frame includes at least two U-shaped support rods, the open ends of the two U-shaped support rods are connected to the fixing seat, and the bent ends of the U-shaped support rods are connected to the gas collecting and sealing unit.

8. The cylindrical battery charge and discharge gas collection device according to any one of claims 1 to 5, characterized in that: The cylindrical battery charging and discharging gas collection device also includes at least two battery clamp units, which are relatively arranged on both sides of the battery placement position. The battery clamp is movably connected to the support frame along the height direction, and the battery clamp module is suitable for clamping the battery in the battery placement position.

9. The cylindrical battery charging and discharging gas collection device according to claim 8, characterized in that: The battery clamp unit includes a push rod, a slider and a clamping block. The slider can be slidably mounted on the support frame along the height direction. The push rod is inserted into the slider. The clamping block is provided on one end of the push rod close to the battery. The push rod is suitable for adjusting the distance between the clamping block and the slider.

10. The cylindrical battery charging and discharging gas collection device according to claim 9, characterized in that: The clamping block has a first clamping surface and a second clamping surface placed toward the battery, and the first clamping surface and the second clamping surface are arranged at an obtuse angle.

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