High and low temperature test oven for lithium battery

Abstract

The utility model discloses a lithium battery high low temperature test temperature box relates to battery test technical field, including box and the hot -blast system of being located in the box, install the placement pipe in the box, and the air outlet of hot -blast system is located the inside of placement pipe bottom end, and the bottom disc is rotatably installed to placement pipe bottom end, and the temperature sensor that is annular array distribution is installed to the bottom disc, and the inner wall of placement pipe is provided with the dynamic turbulence component that sets up with annular array distribution and presents spiral vortex channel, still include controller, and dynamic turbulence component obtains the feedback dynamic adjustment of temperature sensor's wind direction through controller. Through vortex channel guide airflow spiral flow, match annular array temperature sensor real -time feedback temperature difference, and then cooperate dynamic turbulence component dynamic regulation airflow, eliminate the local temperature difference caused by battery obstruction, guarantee each point temperature dynamic stability, improve battery heating performance detection accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of battery testing technology, and specifically relates to a high and low temperature test chamber for lithium batteries. Background Technology

[0002] A battery electrical performance testing chamber is a device used to simulate different temperature environments to test the electrical performance of batteries under various temperature conditions. Battery electrical performance parameters, such as capacity, internal resistance, and charge / discharge efficiency, change with temperature. Uneven temperature distribution can cause batteries or battery modules in different locations to be subjected to varying temperature conditions, resulting in differences in their electrical performance parameters. This can lead to test results that do not accurately reflect the battery's true performance under standard or actual operating temperatures.

[0003] Chinese patent CN111624501 describes a constant-temperature charging test chamber for power batteries. This chamber primarily works by varying the number and power of the PIC heating element and thermoelectric cooler, setting the temperature controller, and using a fan. While the fan can bring a specific area within the chamber to the set temperature, its inability to rotate prevents airflow from circulating to all areas. This can lead to significant temperature differences in certain areas. This is a drawback of existing battery testing chambers: uneven temperature distribution within the chamber affects the accuracy of battery thermal performance testing. Utility Model Content

[0004] In view of the problems mentioned in the background art, the purpose of this utility model is to provide a high and low temperature test chamber for lithium batteries to solve the problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A high and low temperature test chamber for lithium batteries includes a chamber body and a hot air system located inside the chamber body. A placement tube is installed inside the chamber body, and the air outlet of the hot air system is located inside the bottom end of the placement tube. A chassis is rotatably installed at the bottom end of the placement tube, and temperature sensors arranged in a ring array are installed on the chassis. A spiral vortex channel is opened on the inner wall of the placement tube, and dynamic turbulence components are arranged in a ring array. The chamber also includes a controller, and the dynamic turbulence components dynamically adjust the airflow direction by obtaining feedback from the temperature sensors through the controller.

[0007] The battery to be tested is placed on the chassis. The hot air system creates the testing environment, and the vortex channel is used to guide the airflow, making the hot air flow more uniform. Multiple temperature sensors monitor the temperature at each point in real time and transmit the results to the controller. The controller determines whether the temperature at each point is uniform and controls the dynamic turbulence component based on the results. The dynamic turbulence component adjusts its direction to make the temperature inside the tube more uniform.

[0008] Preferably, the direction of the air outlet is consistent with the rotation direction of the vortex channel.

[0009] When the air inlet direction of the blower is consistent with the rotation direction of the vortex channel, the hot flow flows smoothly along the spiral path of the vortex channel without having to overcome the impact resistance of the reverse airflow, thus avoiding local heat accumulation caused by airflow obstruction; the hot flow rises steadily in a spiral along the channel, forming a uniform airflow field of "annular convection".

[0010] Preferably, the hot air system includes a blower and an electric heater, with the blower's outlet blowing air upwards through a placement pipe, and the electric heater located on one side of the blower.

[0011] The blower is used to provide airflow in the direction of the vortex vortex, and the electric heater is used to provide a high-temperature environment.

[0012] Preferably, a heat dissipation vent is provided through the upper side wall of the enclosure.

[0013] The ventilation vents can effectively regulate the internal temperature of the enclosure and prevent overheating.

[0014] Preferably, the dynamic turbulence component includes a rotating plate and a second motor. The rotating plate extends along the height direction of the placement tube, and the output shaft of the second motor is fixedly connected to the rotating plate. The rotating plate rotates around the height direction of the placement tube to guide the flow.

[0015] Based on the monitoring of the temperature sensor, under the control of the controller, the second motor drives the rotating plate to rotate around the height direction, so that the rotating plate changes the interception direction of the heat flow, thereby making the temperature inside the tube more uniform.

[0016] Preferably, the rotating plate is rectangular, and multiple sets of linked guide vanes are rotatably installed inside the rotating plate, with the guide vanes rotating around the horizontal direction to guide the flow.

[0017] Multiple sets of guide vanes work together to form a "louvered" vertical heat flow guide, which aims to make the temperature inside the tube more uniform.

[0018] Preferably, a third motor is mounted on the rotating plate, any guide vane is fixedly connected to the output end of the third motor, the temperature sensor is electrically connected to the input end of the controller, and both the second and third motors are electrically connected to the output end of the controller.

[0019] Temperature sensors are used to monitor the temperature at various points. The controller judges and controls the second and third motors based on the feedback from the temperature sensors. The second motor controls the rotating plate to rotate horizontally, and the third motor controls the guide vanes to rotate vertically.

[0020] Preferably, a first motor is installed at the bottom of the placement tube, the central shaft of the chassis is fixedly connected to the output shaft of the first motor, multiple sets of batteries are placed on the chassis, and the first motor drives the chassis to rotate.

[0021] The first motor drives the chassis to rotate, ensuring that the battery is heated evenly during testing. This avoids localized overheating or uneven temperature distribution, thus improving the accuracy and reliability of the test results.

[0022] Preferably, a detector for testing is fixedly installed at the bottom of the chassis. The detector is electrically connected to the battery being tested and to the controller.

[0023] The detector can monitor the battery's operating status in high-temperature environments in real time and transmit the data to the controller, facilitating accurate analysis and evaluation of battery performance.

[0024] Preferably, the chassis rotates repeatedly from 0 to 180°.

[0025] The first motor drives the chassis to rotate back and forth to prevent the wiring harness from getting tangled.

[0026] This invention proposes a high and low temperature test chamber for lithium batteries. It guides the airflow in a spiral flow through a vortex channel, uses a ring array temperature sensor to provide real-time feedback on the temperature difference, and dynamically adjusts the airflow with a dynamic turbulence component to eliminate local temperature differences caused by battery obstruction, ensuring dynamic temperature stability at all points and improving the accuracy of battery thermal performance testing.

[0027] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of a lithium battery high and low temperature test chamber proposed in this utility model;

[0029] Figure 2 This is a three-dimensional structural diagram of the internal detection device of a high and low temperature test chamber for lithium batteries proposed in this utility model;

[0030] Figure 3 This is a front sectional view of the internal testing device of a high and low temperature test chamber for lithium batteries proposed in this utility model;

[0031] Figure 4 for Figure 2 Enlarged view of point B in the middle;

[0032] Figure 5 for Figure 2 Enlarged view of point A in the middle.

[0033] Reference numerals: 1. Cabinet; 2. Vent; 3. Control panel; 4. Base; 5. Cabinet door; 6. Chassis; 7. Vortex channel; 8. Blower; 9. Electric heater; 10. Controller; 11. Rotating plate; 12. Connector; 13. First motor; 14. Guide vane; 15. Third motor; 16. Connecting rod; 17. Bracket; 18. Second motor; 19. Temperature sensor; 20. Placement tube. Detailed Implementation

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar symbols 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.

[0035] Example 1

[0036] refer to Figures 1 to 5 The lithium battery high and low temperature test chamber described in this embodiment includes a chamber body 1. The front of the chamber body 1 is provided with a cabinet door 5, and the bottom of the chamber body 1 is fixed with a base 4. Multiple chamber bodies 1 can be stacked. The cabinet door 5 facilitates the placement and removal of batteries, and the base 4 enhances the stability of the device.

[0037] The housing 1 is equipped with a placement tube 20. The air outlet of the hot air system is located inside the bottom of the placement tube 20. A chassis 6 is rotatably mounted on the bottom of the placement tube 20. Temperature sensors 19 arranged in a ring array are mounted on the chassis 6. The inner wall of the placement tube 20 is provided with a spiral vortex channel 7 and dynamic turbulence components are arranged in a ring array. The housing 20 also includes a controller 10. The dynamic turbulence components dynamically adjust the airflow direction by receiving feedback from the temperature sensors 19 through the controller 10.

[0038] Preferably, the direction of the air outlet is consistent with the rotation direction of the vortex channel 7. The heat flow is smooth along the spiral path of the vortex channel without having to overcome the impact resistance of the reverse airflow, thus avoiding local heat accumulation caused by airflow obstruction; the heat flow rises steadily in a spiral along the channel, forming a uniform airflow field of "annular convection".

[0039] Preferably, the hot air system includes a blower 8 and an electric heater 9. The air outlet of the blower 8 blows air upward along the vortex channel 7 through the placement pipe 20. The electric heater 9 is located on one side of the blower 8 to provide ambient temperature. A heat dissipation vent 2 is provided through the upper side wall of the housing 1. The heat dissipation vent 2 can effectively regulate the internal temperature of the housing and avoid overheating.

[0040] The dynamic flow-disrupting component includes a rotating plate 11 and a second motor 18. The rotating plate 11 extends along the height direction of the placement tube 20, and the output shaft of the second motor 18 is fixedly connected to the rotating plate 11. The rotating plate 11 rotates around the height direction of the placement tube 20 to guide the flow. The second motor 18 drives the rotating plate 11 to rotate around the height direction, causing the rotating plate 11 to change the direction of heat flow interception, thereby making the temperature inside the placement tube 20 more uniform.

[0041] Specifically, the dynamic aerodynamic component includes two sets of brackets 17, with a rotating plate 11 rotatably mounted between the two sets of brackets 17. A second motor 18 is mounted on one set of brackets 17, and the output shaft of the second motor 18 passes through the bracket 17 and is fixedly connected to the rotating plate 11. The output shaft of the second motor 18 is vertical, and the rotating plate 11 deflects and aerodynamically rotates around the vertical direction.

[0042] The rotating plate 11 is rectangular in shape, and multiple sets of linked guide vanes 14 are rotatably mounted inside the rotating plate 11. The guide vanes 14 rotate horizontally to guide the flow. A set of connecting rods 16 is installed on each side of the multiple sets of guide vanes 14, and the two ends of the guide vanes 14 are rotatably connected to the connecting rods 16 on both sides. A third motor 15 is mounted on the rotating plate 11, and any guide vane 14 is fixedly connected to the output end of the third motor 15.

[0043] Preferably, the output shaft of the third motor 15 is fixedly connected to the topmost guide vane 14, and the third motor 15 drives multiple sets of guide vanes 14 to fan up and down to guide the flow through the connecting rod 16. The multiple sets of guide vanes 14 work together to form a "louvered" vertical heat flow, which also aims to make the temperature inside the placement tube 20 more uniform.

[0044] The bottom of the placement tube 20 is provided with an installation groove, in which the first motor 13 is installed. The central shaft of the chassis 6 is fixedly connected to the output shaft of the first motor 13. Multiple sets of batteries are placed on the chassis 6. The first motor 13 drives the chassis 6 to rotate, so that the batteries can be heated evenly during the testing process, avoiding the problem of local overheating or uneven temperature, and improving the accuracy and reliability of the test results.

[0045] A detector 12 for testing is fixedly mounted on the bottom of the chassis 6. The detector 12 is electrically connected to the battery under test and to the controller 10. The detector 12 can monitor the battery's operating status in real time under high temperature conditions and transmit the data to the controller 10, facilitating accurate analysis and evaluation of battery performance.

[0046] Preferably, the detectors 12 are symmetrically mounted on both sides of the chassis 6, and the batteries on both sides of the chassis 6 are electrically connected to the two sets of detectors 12 respectively.

[0047] Preferably, the chassis 6 rotates repeatedly from 0 to 180°. The first motor 13 drives the chassis 6 to rotate back and forth to prevent the wire harness from getting tangled.

[0048] A control panel 3 is installed on one side of the cabinet door 5. The control panel 3 is electrically connected to the controller 10. The first motor 13, the two sets of detectors 12 and the electric heater 9 are all electrically connected to the controller 10. The controller 10 controls the first motor 13 to start and rotate repeatedly from 0 to 180°. While ensuring that the wire harness does not get tangled, the battery rotates and is heated evenly. The control panel 3 allows for convenient observation of the battery status detected by the detectors 12, control of the first motor 13 and control of the temperature of the electric heater 9.

[0049] Temperature sensors 19 are all electrically connected to the input terminals of controller 10, and the second motor 18 and the third motor 15 are both electrically connected to the output terminals of controller 10. Temperature sensors 19 monitor the temperature at various locations and feed the results back to controller 10. Controller 10 controls the second motor 18 and the third motor 15 to guide the rotating plate 11 and the guide vane 14 horizontally and vertically, respectively, to even out the temperature at various locations. The ambient temperature at each location can be observed through control panel 3.

[0050] The device guides the hot flow through the vortex channel 7, and is equipped with a rotating plate 11 in a ring array and a linkage guide plate 14. Combined with the real-time monitoring of the temperature sensor 19, it accurately solves the problem of large local temperature differences in existing temperature chambers, ensures dynamic temperature stability at all points inside the chamber, and improves the uniformity of battery heating and detection accuracy. The controller 10 coordinates the electronic control components, the chassis 6 rotates to prevent local overheating, and the detector 12 collects battery operating data in real time, providing reliable support for performance evaluation. It has a high degree of intelligence.

[0051] It should be understood that the terms "length", "thickness", "upper", "lower", "inner", "outer", "axial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and 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.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0053] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0054] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0055] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high and low temperature test chamber for lithium batteries, comprising a chamber body (1) and a hot air system located inside the chamber body (1), characterized in that: The housing (1) is equipped with a placement tube (20). The air outlet of the hot air system is located inside the bottom of the placement tube (20). The bottom of the placement tube (20) is rotatably mounted with a chassis (6). Temperature sensors (19) are installed on the chassis (6) in a ring array. The inner wall of the placement tube (20) is provided with a spiral vortex channel (7) and dynamic turbulence components are arranged in a ring array. The housing (20) also includes a controller (10). The dynamic turbulence components obtain feedback from the temperature sensors (19) through the controller (10) and dynamically adjust the airflow direction.

2. The lithium battery high and low temperature test chamber according to claim 1, characterized in that: The direction of the air outlet is consistent with the rotation direction of the vortex channel (7).

3. The lithium battery high and low temperature test chamber according to claim 1, characterized in that: The hot air system includes a blower (8) and an electric heater (9). The outlet of the blower (8) blows air upward through the placement pipe (20), and the electric heater (9) is located on one side of the blower (8).

4. The lithium battery high and low temperature test chamber according to claim 3, characterized in that: A heat dissipation vent (2) is provided through the upper side wall of the enclosure (1).

5. The lithium battery high and low temperature test chamber according to claim 1, characterized in that: The dynamic turbulence assembly includes a rotating plate (11) and a second motor (18). The rotating plate (11) extends along the height direction of the placement tube (20). The output shaft of the second motor (18) is fixedly connected to the rotating plate (11). The rotating plate (11) rotates around the height direction of the placement tube (20) to guide the flow.

6. The lithium battery high and low temperature test chamber according to claim 5, characterized in that: The rotating plate (11) is rectangular. Multiple sets of linked guide vanes (14) are installed inside the rotating plate (11). The guide vanes (14) rotate around the horizontal direction to guide the flow.

7. The lithium battery high and low temperature test chamber according to claim 6, characterized in that: A third motor (15) is installed on the rotating plate (11). Any guide vane (14) is fixedly connected to the output end of the third motor (15). The temperature sensor (19) is electrically connected to the input end of the controller (10). The second motor (18) and the third motor (15) are both electrically connected to the output end of the controller (10).

8. The lithium battery high and low temperature test chamber according to claim 1, characterized in that: The bottom of the placement tube (20) is equipped with a first motor (13), and the central shaft of the chassis (6) is fixedly connected to the output shaft of the first motor (13). The first motor (13) drives the chassis (6) to rotate.

9. The lithium battery high and low temperature test chamber according to claim 8, characterized in that: A detector (12) for detection is fixedly installed at the bottom of the chassis (6), and the detector (12) is electrically connected to the controller (10).

10. The lithium battery high and low temperature test chamber according to claim 9, characterized in that: The chassis (6) rotates repeatedly from 0 to 180°.

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