Lithium battery aging test device capable of simulating temperature and humidity

Abstract

The invention provides a lithium battery aging test device capable of simulating temperature and humidity, which comprises a test box body and a test box cover, and further comprises a connecting pipe, one end of the connecting pipe is connected with the test box body, the other end of the connecting pipe is connected with an air blowing mechanism, and a plurality of water mist nozzles, a refrigeration module and a heating module are arranged in the connecting pipe; a humidity sensor, a temperature sensor and a pressure release valve communicated with the outside are arranged in the test box body; the controller is electrically connected with the air blowing mechanism, the water mist spray head, the refrigeration module, the heating module, the humidity sensor and the temperature sensor, air is blown into the test box body through the air blowing mechanism after refrigeration of the refrigeration module or heating of the heating module, it is guaranteed that the internal temperature of the test box body is equal, all end faces of a lithium battery are evenly heated, and the test efficiency is improved. And the accuracy of test results is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of battery aging test devices, and in particular to a lithium battery aging test device capable of simulating temperature and humidity. Background Art

[0002] The main purpose of lithium battery aging testing is to evaluate the performance degradation of lithium batteries under different conditions by simulating actual usage scenarios, including changes in key parameters such as battery capacity, internal resistance and voltage, and to predict the actual service life of the battery.

[0003] For example, Chinese patent document CN118795365A discloses a lithium battery aging test system that can simulate temperature and humidity. It uses a cooling and heating module to provide heat, and then rotates the rotating assembly to make the battery evenly heated. However, since the heating surface of the battery is different at each moment, it is still impossible to ensure that the heating of each end face of the battery is consistent, which in turn affects the detection accuracy. In addition, the structure of the cooling and heating module and the rotating assembly is relatively complex, which increases the manufacturing cost of the above system. Summary of the invention

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a lithium battery aging test device that can simulate temperature and humidity to solve the problems mentioned in the above background technology section.

[0005] The present invention is achieved through the following technical solutions:

[0006] A lithium battery aging test device capable of simulating temperature and humidity comprises a test box body and a test box cover, and also comprises a connecting pipe, one end of the connecting pipe is connected to the test box body, and the other end of the connecting pipe is connected to a blower mechanism, wherein the connecting pipe is provided with a plurality of water mist nozzles, a refrigeration module and a heating module; and also comprises a controller, wherein the test box body is provided with a humidity sensor and a temperature sensor, and a pressure relief valve connected to the outside; and the controller is electrically connected to the blower mechanism, the water mist nozzles, the refrigeration module, the heating module, the humidity sensor and the temperature sensor.

[0007] Furthermore, it also includes a vibration component, which includes a bottom plate, a plurality of springs connected between the bottom of the test box and the bottom plate, and a vibration motor arranged on the bottom plate, wherein the output end of the vibration motor is connected to the bottom of the test box.

[0008] Furthermore, the connecting pipe includes a soft pipe section and a hard pipe section, and the water mist nozzle, the refrigeration module and the heating module are arranged in the hard pipe section.

[0009] Furthermore, the hair dryer is fixedly mounted on the bottom plate.

[0010] Furthermore, a four-way tube is provided in the test box, one end of the four-way tube is connected to the connecting tube, and the other end of the four-way tube constitutes an upper channel, a middle channel and a lower channel, and the middle channel is aligned with the lithium battery; the four-way tube is provided with a solenoid valve electrically connected to the controller, and the solenoid valve selectively selects one of the upper channel, the middle channel and the lower channel to be in a conducting state.

[0011] Furthermore, the middle channel is provided with a grille plate.

[0012] Furthermore, an air flow rate sensor electrically connected to the controller is provided at the front end of the middle channel.

[0013] Furthermore, the test box has a plurality of screws arranged at intervals, the lithium battery is disposed between the screws, and also includes a pressing plate connected to the screws, the pressing plate passes through the screws and abuts against the upper end of the lithium battery.

[0014] Furthermore, the pressing plate is provided with terminals for contacting the positive and negative electrodes of the lithium battery, and a wire connected to the terminals, and the other end of the wire extends out of the test box.

[0015] Furthermore, the refrigeration module is a semiconductor refrigeration sheet, and the heating module is a semiconductor heating sheet.

[0016] The beneficial effects of the present invention are as follows: a lithium battery aging test device capable of simulating temperature and humidity comprises a test box body and a test box cover, and also comprises a connecting pipe, one end of the connecting pipe is connected to the test box body, and the other end of the connecting pipe is connected to a blower mechanism, wherein the connecting pipe is provided with a plurality of water mist nozzles, a cooling module and a heating module; and also comprises a controller, wherein the test box body is provided with a humidity sensor and a temperature sensor, and a pressure relief valve connected to the outside; the controller is electrically connected to the blower mechanism, the water mist nozzle, the cooling module, the heating module, the humidity sensor and the temperature sensor, and after cooling by the cooling module or heating by the heating module, the wind is blown into the test box body through the blower mechanism, thereby ensuring that the internal temperature of the test box body is uniform, so that each end face of the lithium battery is heated evenly, and the accuracy of the test result is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a stereogram of the present invention.

[0018] Figure 2 It is another stereogram of the present invention.

[0019] Figure 3 This is an exploded view of the pressing plate and the lithium battery of the present invention.

[0020] The above drawings include the following reference numerals:

[0021] 1. Test box body; 11. Screw; 12. Pressing plate; 121. Terminal block; 2. Test box cover; 3. Connecting pipe; 31. Soft pipe section; 32. Hard pipe section; 4. Blowing mechanism; 5. Vibration assembly; 51. Bottom plate; 52. Spring; 53. Vibration motor; 6. Cross-way pipe; 61. Upper channel; 62. Lower channel; 63. Middle channel; 7. Pressure relief valve; A. Lithium battery. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0023] Reference Figures 1 to 3 As shown, a device for simulating temperature and humidity aging test of lithium battery A comprises a test box 1 and a test box cover 2, wherein the test box cover 2 is used to close the opening of the test box 1. It also comprises a connecting pipe 3, one end of which is connected to the test box 1, and the other end of which is connected to a blower mechanism 4, wherein the connecting pipe 3 is provided with a plurality of water mist nozzles, a cooling module and a heating module; it also comprises a controller, wherein the test box 1 is provided with a humidity sensor and a temperature sensor, and a pressure relief valve 7 connected to the outside; the controller is electrically connected to the blower mechanism 4, the water mist nozzle, the cooling module, the heating module, the humidity sensor and the temperature sensor.

[0024] When in use, the air in the connecting pipe 3 is cooled or heated by the cooling module or the heating module, and then the air is blown into the test box 1 by the blower mechanism 4. When the temperature sensor detects that the temperature reaches the set value, it transmits a signal to the controller, and the controller controls the working power of the cooling module or the heating module to maintain the temperature of each part inside the test box 1 to ensure that the lithium battery A is heated evenly. When it is necessary to adjust the humidity in the test box 1, the water mist nozzle is controlled to open, and the water mist is blown into the test box 1 by the blower mechanism 4. When the humidity sensor detects that the humidity reaches the set value, it transmits a signal to the controller to maintain the internal temperature of each test box 1 to ensure that each end face of the lithium battery A is subjected to the same heat and humidity, thereby ensuring the accuracy of the test results.

[0025] When the cooling module or the heating module heats or cools the test box 1, the pressure will change. The pressure in the test box 1 is adjusted by the pressure relief valve 7 to avoid the pressure factor affecting the test accuracy of the lithium battery A.

[0026] Since the lithium battery A may be installed on a vehicle and there is vibration during the driving of the vehicle, in order to test whether the vibration will affect the aging of the lithium battery A, the temperature and humidity simulating lithium battery A aging test device of the present invention also includes a vibration component 5.

[0027] Specifically, the vibration assembly 5 includes a bottom plate 51, a plurality of springs 52 connected between the bottom of the test box 1 and the bottom plate 51, and a vibration motor 53 disposed on the bottom plate 51, wherein the output end of the vibration motor 53 is connected to the bottom of the test box 1. The vibration environment is simulated by the operation of the vibration motor 53, and the influence of the vibration on the aging degree of the lithium battery A is tested.

[0028] The connecting pipe 3 includes a soft pipe section 31 and a hard pipe section 32. The water mist nozzle, the refrigeration module and the heating module are arranged in the hard pipe section 32. Due to the existence of the soft pipe section 31, when the vibration motor 53 drives the test box 1 to vibrate, the vibration will not be transferred to the hair dryer 4, the water mist nozzle, the refrigeration module and the heating module, etc., causing the above-mentioned components to be damaged due to vibration.

[0029] In addition, the air blowing mechanism 4 is fixed to the bottom plate 51, thereby ensuring the integrity of the entire lithium battery A aging test device and facilitating transportation.

[0030] The test box 1 is provided with a four-way pipe 6, one end of which is connected to the connecting pipe 3, and the other end of the four-way pipe 6 constitutes an upper channel 61, a middle channel 63 and a lower channel 62, and the middle channel 63 is aligned with the lithium battery A; the four-way pipe 6 is provided with a solenoid valve electrically connected to the controller, and the solenoid valve selectively selects one of the upper channel 61, the middle channel 63 and the lower channel 62 to be in a conducting state.

[0031] Specifically, the upper channel 61 is vertically arranged upward, the lower channel 62 is vertically arranged downward, and the middle channel 63 is horizontally extended, so as to facilitate the processing and forming of the cross-way pipe 6 .

[0032] When the refrigeration module is started, the controller controls the solenoid valve so that air is discharged from the connecting pipe 3 through the upper pipe. Blowing the cold air upward can utilize the natural tendency of cold air to fall, thereby more effectively cooling the entire test box 1. When the heating module is started, the controller controls the solenoid valve so that air is discharged from the connecting pipe 3 through the lower pipe. Blowing the hot air downward can utilize the natural tendency of hot air to rise, thereby more effectively heating the entire test box 1. This reduces the working time of the refrigeration module or the heating module and reduces power consumption.

[0033] When the battery is installed in a high-speed mechanism such as a car or an aircraft, the existing design is to guide the external air to contact the battery to cool the battery. In order to simulate the effect of air flow rate on the aging degree of lithium battery A, the solenoid valve is controlled by the controller to discharge the air from the connecting pipe 3 through the middle channel 63. The middle channel 63 is aligned with the lithium battery A so that the airflow blows towards the lithium battery A, thereby testing the effect of the flow rate on the aging degree of the lithium battery A.

[0034] The middle channel 63 is provided with a grid plate, which can disperse the airflow, increase the air outlet area, and increase the contact area between the lithium battery A and the airflow, which is closer to the actual use situation.

[0035] An air velocity sensor electrically connected to the controller is provided at the front end of the middle channel 63. The air velocity sensor determines the air velocity and feeds back a signal to the controller, which controls the power of the blower mechanism 4.

[0036] The test box 1 is provided with a plurality of screws 11 arranged at intervals, and the lithium battery A is disposed between the screws 11, and further includes a pressing plate 12 connected to the screws 11, the pressing plate 12 passes through the screws 11 and abuts against the upper end of the lithium battery A. The lithium battery A is fixed by the pressing plate 12 to prevent shaking during vibration.

[0037] The pressing plate 12 is provided with a terminal 121 abutting against the positive and negative electrodes of the lithium battery A, and a wire (not shown in the figure) connected to the terminal, and the other end of the wire extends out of the test box 1. Through the terminal 121 provided on the pressing plate 12, the external test circuit can pass through the wire and then enter the terminal 121, and connect the terminal 121 to the positive and negative electrodes of the lithium battery A to ensure that the circuit will not be disconnected during the vibration process.

[0038] The refrigeration module is a semiconductor refrigeration sheet, and the heating module is a semiconductor heating sheet. In the prior art, the semiconductor refrigeration sheet can reduce the temperature to -60°C, and the semiconductor heating sheet can increase the temperature to 50°C, which meets the requirements of simulating various temperature environments for using lithium battery A. The air blowing mechanism 4 can be a blower, etc., and the air blowing mechanism 4 cooperates with the refrigeration module or the heating module to achieve rapid cooling of the inside of the test box 1, quickly reach the environmental temperature requirements for the detection of lithium battery A, and save electricity.

[0039] Among them, the controller can selectively turn on the hair dryer 4, the water mist nozzle, the cooling module, the heating module and the vibration motor 53 to simulate the set humidity, temperature, wind speed, vibration and other environmental combinations, which is closer to the actual battery usage environment.

[0040] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0041] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0042] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lithium battery aging test device capable of simulating temperature and humidity, comprising a test box (1) and a test box cover (2), characterized in that: It also comprises a connecting pipe (3), one end of which is connected to the test box (1), and the other end of which is connected to a blower mechanism (4), wherein a plurality of water mist nozzles, a cooling module and a heating module are arranged in the connecting pipe (3); It also includes a controller, wherein the test box (1) is provided with a humidity sensor and a temperature sensor, and a pressure relief valve (7) connected to the outside; the controller is electrically connected to the hair dryer (4), the water mist nozzle, the cooling module, the heating module, the humidity sensor and the temperature sensor.

2. A lithium battery aging test device capable of simulating temperature and humidity according to claim 1, characterized in that: The invention also comprises a vibration component (5), the vibration component (5) comprising a bottom plate (51), a plurality of springs (52) connected between the bottom of the test box (1) and the bottom plate (51), and a vibration motor (53) arranged on the bottom plate (51), wherein the output end of the vibration motor (53) is connected to the bottom of the test box (1).

3. A lithium battery aging test device capable of simulating temperature and humidity according to claim 2, characterized in that: The connecting pipe (3) comprises a soft pipe section (31) and a hard pipe section (32), and the water mist nozzle, the refrigeration module and the heating module are arranged in the hard pipe section (32).

4. A lithium battery aging test device capable of simulating temperature and humidity according to claim 3, characterized in that: The blower mechanism (4) is fixedly mounted on the bottom plate (51).

5. A lithium battery aging test device capable of simulating temperature and humidity according to claim 1, characterized in that: The test box (1) is provided with a four-way pipe (6), one end of which is connected to the connecting pipe (3), and the other end of which forms an upper channel (61), a middle channel (63) and a lower channel (62), wherein the middle channel (63) is aligned with the lithium battery (A); the four-way pipe (6) is provided with a solenoid valve electrically connected to the controller, wherein the solenoid valve selectively places the upper channel (61), the middle channel (63) and the lower channel (62) in a conducting state.

6. A lithium battery aging test device capable of simulating temperature and humidity according to claim 5, characterized in that: The middle channel (63) is provided with a grid plate.

7. A lithium battery aging test device capable of simulating temperature and humidity according to claim 5, characterized in that: An air flow rate sensor electrically connected to the controller is provided at the front end of the middle channel (63).

8. The lithium battery aging test device capable of simulating temperature and humidity according to claim 1, characterized in that: The test box (1) is provided with a plurality of screw rods (11) arranged at intervals, the lithium battery (A) is arranged between the screw rods (11), and further comprises a pressing plate (12) connected to the screw rods (11), the pressing plate (12) passing through the screw rods (11) and abutting against the upper end of the lithium battery (A).

9. A lithium battery aging test device capable of simulating temperature and humidity according to claim 8, characterized in that: The pressing plate (12) is provided with a terminal post (121) for contacting the positive and negative electrodes of the lithium battery (A), and a wire connected to the terminal post, the other end of the wire extending out of the test box (1).

10. A lithium battery aging test device capable of simulating temperature and humidity according to any one of claims 1 to 9, characterized in that: The refrigeration module is a semiconductor refrigeration sheet, and the heating module is a semiconductor heating sheet.

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