Battery thermal runaway gas production measuring system

Abstract

The utility model relates to the technical field of battery thermal runaway experimental equipment, in particular to a battery thermal runaway gas production measuring system. The battery thermal runaway gas production measuring system comprises an impeller, a clamping assembly and a control assembly. Wherein the clamping assembly is configured to be clamped on the battery cover plate, and the impeller is movably connected with the clamping assembly. The control assembly is in signal connection with the impeller, and the control assembly can control the impeller to rotate around the clamping assembly and is arranged above an anti-explosion valve of the battery cover plate; the control assembly can receive rotating speed signals of blades in the impeller and cross section area signals of the blades and calculate the flow speed of gas flowing through the impeller and the gas flow in unit time. The battery thermal runaway gas production measuring system can accurately monitor the gas flow rate at the explosion-proof valve when the battery is subjected to thermal runaway, is simple and convenient to operate and low in cost, and improves the working efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of battery thermal runaway experimental equipment, and in particular to a battery thermal runaway gas generation measurement system. Background Technology

[0002] During thermal runaway testing, the battery's internal chemical reactions become uncontrolled under overcharge or overheating conditions. This causes the battery's explosion-proof valve to open, releasing a large amount of heat and flammable gases rapidly, leading to a sharp rise in battery temperature. If the rate of gas generation during thermal runaway is too high, and the flow rate of the venting gas from the explosion-proof valve is insufficient, the internal pressure of the battery may increase dramatically, potentially causing a fire or explosion. Therefore, testing the rate of gas generation and flow rate during thermal runaway can effectively assess battery safety performance and help guide improvements in battery safety design and management.

[0003] In existing technologies, measuring the amount and rate of gas generation during battery thermal runaway primarily involves placing the battery inside an insulated, sealed container. When the battery triggers thermal runaway and releases a large amount of gas, the gas generation rate is approximated using the ideal gas law by monitoring the temperature and pressure inside the insulated container throughout the thermal runaway test. Subsequently, the total amount of gas inside the insulated container is measured to calculate the total amount of gas released after the battery's thermal runaway. This testing method cannot accurately monitor the gas flow rate escaping from the battery's explosion-proof valve; furthermore, the insulated container equipment is expensive, and the pre-test preparation process is cumbersome, reducing the efficiency of the test.

[0004] Therefore, there is an urgent need to design a battery thermal runaway gas generation measurement system to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a battery thermal runaway gas generation measurement system that can accurately monitor the gas flow rate at the explosion-proof valve when the battery experiences thermal runaway. The system is simple and convenient to operate, low in cost, and improves work efficiency.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] This utility model provides a battery thermal runaway gas generation measurement system, including:

[0008] impeller;

[0009] A clamping assembly configured to clamp onto a battery cover, wherein the impeller is movably connected to the clamping assembly;

[0010] A control component is connected to the impeller via a signal. The control component is capable of controlling the impeller to rotate around the clamping assembly and be positioned above the explosion-proof valve of the battery cover. The control component is also capable of receiving the rotational speed signal and the cross-sectional area signal of the blades in the impeller and calculating the gas velocity and gas flow rate per unit time flowing through the impeller.

[0011] As an optional technical solution for a battery thermal runaway gas generation measurement system, the clamping assembly includes a connector and two clamping plates. The two clamping plates are arranged opposite to each other. One end of the connector is elastically connected to one of the clamping plates, and the other end is elastically connected to the other clamping plate. The clamping plates are clamped on the large surface of the battery casing, and the connector is located above the battery cover and surrounds the explosion-proof valve.

[0012] As an optional technical solution for a battery thermal runaway gas generation measurement system, the clamping assembly includes a first elastic element and a second elastic element. One end of the first elastic element is connected to the connecting member, and the other end is connected to one of the clamping pieces. One end of the second elastic element is connected to the connecting member, and the other end is connected to the other clamping piece.

[0013] As an optional technical solution for a battery thermal runaway gas generation measurement system, the width of the connector is smaller than the width of the battery cover.

[0014] As an optional technical solution for a battery thermal runaway gas generation measurement system, the connector has a flange, the impeller is fastened to the connector and forms an accommodating space with the flange, and the explosion-proof valve is located within the accommodating space.

[0015] As an optional technical solution for a battery thermal runaway gas generation measurement system, the impeller is also equipped with an electric bearing. One end of the electric bearing is connected to the impeller, and the other end is connected to the connector. The electric bearing is signal-connected to the control component, which can control the electric bearing to rotate forward or backward, so that the impeller is engaged with the connector or the connector is disengaged.

[0016] As an optional technical solution for a battery thermal runaway gas generation measurement system, the battery thermal runaway gas generation measurement system further includes at least two clamping end plates, which are clamped on the large surface of the battery casing, and the clamping piece is located between the battery and the clamping end plates.

[0017] As an optional technical solution for a battery thermal runaway gas generation measurement system, the battery thermal runaway gas generation measurement system also includes a fixing component. The clamp end plate is provided with multiple mounting holes, and the two ends of the fixing component are respectively inserted into the mounting holes located on both sides of the battery.

[0018] As an optional technical solution for a battery thermal runaway gas generation measurement system, the battery thermal runaway gas generation measurement system further includes a heating plate, which is disposed between the clamp end plate and the clamping plate, and is used to heat the battery.

[0019] As an optional technical solution for a battery thermal runaway gas generation measurement system, the clamping component is a metal part.

[0020] The beneficial effects of this utility model include at least the following:

[0021] This invention provides a battery thermal runaway gas generation measurement system, which includes an impeller, a clamping assembly, and a control assembly. The clamping assembly is configured to clamp onto a battery cover, and the impeller is movably connected to the clamping assembly. The control assembly is signal-connected to the impeller and can control the impeller to rotate around the clamping assembly and be positioned above the explosion-proof valve of the battery cover. Furthermore, the control assembly can receive the rotational speed signal and the cross-sectional area signal of the blades in the impeller and calculate the gas velocity and gas flow rate per unit time flowing through the impeller.

[0022] In the above-described process, when a battery experiences thermal runaway, the explosion-proof valve opens, allowing the gas inside the battery to escape. The impeller is movably connected to the clamping assembly. At this time, the control component controls the impeller's rotation, enabling it to engage with the clamping assembly and be positioned above the explosion-proof valve. The impeller rotates under the influence of the airflow. The control component calculates the gas velocity and flow rate through the impeller area in real time based on the blade rotation speed and cross-sectional area signals, displaying this information on the control component's screen for operator reference. This battery thermal runaway gas generation measurement system can monitor the gas velocity escaping from the explosion-proof valve after thermal runaway is triggered by the impeller positioned above it. Simultaneously, the cross-sectional area available for gas passage within the impeller is constant, allowing the control component to calculate the gas flow rate per unit time during battery thermal runaway, improving test accuracy. Furthermore, this battery thermal runaway gas generation measurement system is easy to operate and install, improving work efficiency and eliminating the need for the insulated sealing tanks found in existing technologies, significantly reducing costs. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0024] Figure 1This is a top view of the battery thermal runaway gas generation measurement system provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the battery thermal runaway gas generation measurement system provided in this embodiment of the utility model;

[0026] Figure 3 This is an exploded view of the fastener, clamp end plate, heating plate, and battery provided in the embodiment of this utility model.

[0027] Figure Labels

[0028] 10. Battery;

[0029] 100 Impeller; 200 Clamping assembly; 210 Connector; 2101 Flange; 220 Clamping plate; 300 Control assembly; 400 Electric bearing; 500 Clamp end plate; 510 Mounting hole; 600 Fixture; 700 Heating plate. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0037] This embodiment provides a battery thermal runaway gas generation measurement system, which can accurately monitor the gas flow rate at the explosion-proof valve when the battery experiences thermal runaway. It is simple and convenient to operate, low in cost, and improves work efficiency.

[0038] like Figures 1-3As shown, the battery thermal runaway gas generation measurement system mainly includes an impeller 100, a clamping assembly 200, and a control assembly 300. The clamping assembly 200 is configured to clamp onto the battery cover, and the impeller 100 is movably connected to the clamping assembly 200. The control assembly 300 is signal-connected to the impeller 100. The control assembly 300 can control the impeller 100 to rotate around the clamping assembly 200 and position it above the explosion-proof valve of the battery cover; and the control assembly 300 can receive the rotational speed signal and the cross-sectional area signal of the blades in the impeller 100, and calculate the gas velocity and gas flow rate per unit time flowing through the impeller 100.

[0039] Based on the above design, when the battery 10 experiences thermal runaway, the explosion-proof valve opens, allowing the gas inside the battery 10 to escape. The impeller 100 is movably connected to the clamping assembly 200. At this time, the control assembly 300 controls the impeller 100 to rotate, so that the impeller 100 can be fastened onto the clamping assembly 200 and positioned above the explosion-proof valve. The impeller 100 rotates under the action of airflow. The control assembly 300 calculates the gas velocity and gas flow rate in the impeller 100 area in real time based on the rotational speed signal and cross-sectional area signal of the blades in the impeller 100, and displays them on the screen of the control assembly 300 for the operator to read. This battery thermal runaway gas generation measurement system can monitor the gas flow rate escaping from the explosion-proof valve in real time after the battery 10 experiences thermal runaway via an impeller 100 positioned above the explosion-proof valve. Simultaneously, the cross-sectional area of ​​the impeller 100 for gas passage is constant, and the control component 300 can calculate the gas flow rate per unit time during battery 10 thermal runaway, improving test accuracy. Furthermore, this system is easy to operate and install, improving work efficiency and eliminating the need for the insulated sealed container found in existing technologies, significantly reducing costs. Moreover, this system can be tested directly in an explosion-proof enclosure or an open safe room, exhibiting lower environmental requirements and enhancing its flexibility and applicability.

[0040] It should be noted that during the actual test, after the battery 10 experiences thermal runaway and gas escapes from the explosion-proof valve, the control component 300 then controls the impeller 100 to rotate and engage above the explosion-proof valve. This ensures that the explosion-proof valve can open normally when the battery 10 experiences thermal runaway, and also ensures the safety of the impeller 100, preventing gas from damaging the impeller 100 at the moment the explosion-proof valve opens.

[0041] Optionally, the control component 300 in this embodiment is existing technology. The control component 300 has the function of real-time reading, displaying, storing data, and driving the impeller 100 to rotate. The control component 300 has a built-in PLC control circuit board. The control component 300 can convert the rotational speed signal and cross-sectional area signal of the blades in the impeller 100 into the gas velocity and gas flow rate per unit time flowing through the impeller 100 according to the compiled computer program. The control component 300 can be set as a common type of controller, such as a main unit. Its specific structure and working principle will not be described in detail in this embodiment.

[0042] Specifically, before testing battery 10, impeller 100 is in the open state. During the test, after the explosion-proof valve of battery 10 is opened by video monitoring or the sound of the explosion-proof valve opening is heard, the control component 300 sends a signal to rotate impeller 100 and engage it with clamping component 200. That is, impeller 100 is fixed above the explosion-proof valve of battery 10. The gas escape rate and flow rate after the valve of battery 10 is opened are monitored in real time and displayed and recorded by control component 300. After the test is completed, the data recorded by control component 300 can be copied and exported through a mobile storage device for easy analysis of the gas production rate and amount of gas produced throughout the entire test process of battery 10.

[0043] like Figures 1-2 As shown, the clamping assembly 200 in this embodiment includes a connector 210, two clamping pieces 220, a first elastic member, and a second elastic member (the first and second elastic members are not shown in the figure). The two clamping pieces 220 are arranged opposite to each other. One end of the connector 210 is elastically connected to one of the clamping pieces 220, and the other end is elastically connected to the other clamping piece 220. The clamping pieces 220 are clamped on the large surface of the battery 10 casing. The connector 210 is located above the battery cover and surrounds the explosion-proof valve. One end of the first elastic member is connected to the connector 210, and the other end is connected to one of the clamping pieces 220. One end of the second elastic member is connected to the connector 210, and the other end is connected to the other clamping piece 220.

[0044] The arrangement of the first and second elastic elements can improve the stability and reliability of the two clamping pieces 220 clamping the large surface of the battery 10 casing, and reduce or avoid the risk of the clamping assembly 200 falling off due to gas impact during the test.

[0045] The connector 210 is located above the battery cover and surrounds the explosion-proof valve to avoid obstructing the explosion-proof valve and affecting gas discharge. At the same time, it also allows the impeller 100 to be located above the explosion-proof valve after being fastened, thereby improving the accuracy of the impeller 100 in monitoring the gas flow rate.

[0046] In this embodiment, the width of the connector 210 is smaller than the width of the battery cover, which makes it easier for the two clamping pieces 220 to clamp the large surface of the battery 10 housing, thereby improving the stability and reliability of the clamping assembly 200 clamping the battery 10.

[0047] Furthermore, in this embodiment, the connector 210 is annular and coaxially arranged with the explosion-proof valve. This improves the accuracy of the impeller 100 in monitoring gas velocity and gas flow rate per unit time, and reduces measurement errors.

[0048] Furthermore, in this embodiment, the connector 210 has a flange 2101. The impeller 100 is fastened to the connector 210 and forms an accommodating space with the flange 2101. The explosion-proof valve is located within the accommodating space. The flange 2101 allows the gas escaping from the explosion-proof valve to flow as far as possible into the area where the impeller 100 is located, improving the accuracy of the impeller 100 in monitoring the gas flow rate and the gas flow rate per unit time, and reducing the phenomenon of gas escaping to the surroundings.

[0049] like Figures 1-2 As shown, in this embodiment, the impeller 100 is also equipped with an electric bearing 400. One end of the electric bearing 400 is connected to the impeller 100, and the other end is connected to the connector 210. The electric bearing 400 is signal-connected to the control component 300, which can control the electric bearing 400 to rotate forward or backward, so that the impeller 100 is engaged with or disengaged from the connector 210. For example, the electric bearing 400 can engage the impeller 100 with the connector 210 by rotating forward, and disengage it by rotating backward, thus opening the accommodating space at the connector 210. The rotation angle of the impeller 100 can be set from 0 degrees to 180 degrees.

[0050] Optionally, the electric bearing 400 in this embodiment is a conventional component available on the market, and can be configured as a cylindrical roller bearing, deep groove ball bearing, tapered roller bearing, etc.

[0051] like Figure 3 As shown, in this embodiment, the battery thermal runaway gas generation measurement system further includes a fixing member 600, a heating plate 700, and at least two clamping end plates 500. The clamping end plates 500 are clamped on the large surface of the battery 10's casing, and clamping pieces 220 are located between the battery 10 and the clamping end plates 500. The clamping end plates 500 are provided with multiple mounting holes 510. The two ends of the fixing member 600 pass through the mounting holes 510 located on both sides of the battery 10. The heating plate 700 is disposed between the clamping end plates 500 and the clamping pieces 220, and is used to heat the battery 10. This allows the clamping end plates 500 on both sides of the battery 10 to jointly clamp the heating plate 700 and the clamping pieces 220, reducing or avoiding the phenomenon of the heating plate 700 falling off or the clamping pieces 220 loosening, thus improving the reliability of the test. It also ensures that the heating plate 700 is in full contact with the large surface of the battery 10's casing, ensuring heating efficiency.

[0052] It should be noted that the size of the heating plate 700 is the same as the large surface size of the battery 10 casing, and the size of the heating plate 700 is larger than the size of the clamping piece 220, so as to ensure that the heating plate 700 is in contact with the large surface of the battery 10 casing, which facilitates heat transfer.

[0053] Optionally, the fixing member 600 in this embodiment can be configured as a fixing arm with a stud, and the fixing arm is locked in conjunction with a nut.

[0054] Optionally, the clamping component 200 and the impeller 100 in this embodiment are both metal parts. For example, the clamping component 200 and the impeller 100 can be made of stainless steel to improve high temperature resistance and corrosion resistance. They can withstand the corrosion of electrolyte and high temperature after thermal runaway of battery 10, and can be reused to save costs.

[0055] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0056] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A battery thermal runaway gas generation measurement system, characterized in that, include: Impeller (100); A clamping assembly (200) configured to clamp onto a battery cover, wherein the impeller (100) is movably connected to the clamping assembly (200); A control component (300) is connected to the impeller (100) by signal. The control component (300) can control the impeller (100) to rotate around the clamping component (200) and be placed above the explosion-proof valve of the battery cover. The control component (300) can receive the rotational speed signal and the cross-sectional area signal of the blades in the impeller (100) and calculate the gas velocity and gas flow rate per unit time flowing through the impeller (100).

2. The battery thermal runaway gas generation measurement system according to claim 1, characterized in that, The clamping assembly (200) includes a connector (210) and two clamping pieces (220). The two clamping pieces (220) are arranged opposite to each other. One end of the connector (210) is elastically connected to one of the clamping pieces (220), and the other end is elastically connected to the other clamping piece (220). The clamping pieces (220) are clamped on the large surface of the battery (10) housing. The connector (210) is located above the battery cover and surrounds the explosion-proof valve.

3. The battery thermal runaway gas generation measurement system according to claim 2, characterized in that, The clamping assembly (200) includes a first elastic member and a second elastic member. One end of the first elastic member is connected to the connector (210), and the other end is connected to one of the clamping pieces (220). One end of the second elastic member is connected to the connector (210), and the other end is connected to the other clamping piece (220).

4. The battery thermal runaway gas generation measurement system according to claim 2, characterized in that, The width of the connector (210) is smaller than the width of the battery cover.

5. The battery thermal runaway gas generation measurement system according to claim 2, characterized in that, The connector (210) has a flange (2101), the impeller (100) is fastened to the connector (210) and surrounds the flange (2101) to form an accommodating space, and the explosion-proof valve is located in the accommodating space.

6. The battery thermal runaway gas generation measurement system according to claim 2, characterized in that, An electric bearing (400) is also provided on the impeller (100). One end of the electric bearing (400) is connected to the impeller (100), and the other end is connected to the connector (210). The electric bearing (400) is signal-connected to the control component (300). The control component (300) can control the electric bearing (400) to rotate forward or backward, so that the impeller (100) is engaged with the connector (210) or the connector (210) is disengaged.

7. The battery thermal runaway gas generation measurement system according to claim 2, characterized in that, The battery thermal runaway gas generation measurement system also includes at least two clamping end plates (500), which are clamped on the large surface of the battery (10) housing, and the clamping piece (220) is located between the battery (10) and the clamping end plate (500).

8. The battery thermal runaway gas generation measurement system according to claim 7, characterized in that, The battery thermal runaway gas generation measurement system also includes a fixing component (600). The clamp end plate (500) is provided with a plurality of mounting holes (510). The two ends of the fixing component (600) are respectively inserted into the mounting holes (510) located on both sides of the battery (10).

9. The battery thermal runaway gas generation measurement system according to claim 7, characterized in that, The battery thermal runaway gas generation measurement system also includes a heating plate (700), which is disposed between the clamp end plate (500) and the clamping piece (220) and is used to heat the battery (10).

10. The battery thermal runaway gas generation measurement system according to any one of claims 1-9, characterized in that, The clamping assembly (200) is a metal part.

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