Lithium battery performance testing device

Abstract

The utility model discloses a lithium battery performance testing device which comprises a constant temperature box, a simulation transmission mechanism, a pressure testing assembly, a controller and the like. Wherein the thermotank is internally provided with an automobile battery pack which is arranged on the test vehicle, and the automobile battery pack is connected with the resistance detector; the simulation transmission mechanism simulates the vehicle motion according to the power of the vehicle battery pack and checks the cruising ability of the vehicle battery pack. The internal temperature of the constant temperature box is regulated through the constant temperature device, the cruising ability of the automobile battery pack at different environment temperatures is simulated, the internal resistance and voltage of the automobile battery pack are measured through the resistance detector, the performance detection of the automobile battery pack is realized, and the cruising power supply ability of the automobile battery pack can be effectively detected.

Description

Technical Field

[0001] This utility model relates to the field of electric vehicle battery performance testing technology, and in particular to a lithium battery performance testing device. Background Technology

[0002] With the rapid development and promotion of new energy electric vehicles, the performance of batteries is the primary concern for car owners and manufacturers. As batteries are a crucial energy source for the continuous driving range of vehicles, the performance testing of new energy electric vehicle batteries is particularly important. While resistance testers can be used to test the internal resistance and voltage of batteries, they cannot simulate the performance of batteries when installed in a car.

[0003] For example, the existing literature with the technical publication number CN220491009U proposes a lithium battery performance testing device. During the wiring process with the battery, the overall circuit is not connected, which can avoid electric shock to the operator during the wiring process and ensure the safety of the operator. However, the above-mentioned related technology has the following defects: its testing equipment is only used to detect the internal resistance and voltage of electric vehicle batteries under normal conditions. It cannot simulate the battery's range in the vehicle's transmission system, or the range performance of the vehicle's transmission system under repeated braking conditions. At the same time, it cannot simulate the battery's range under different ambient temperatures.

[0004] Therefore, a lithium battery performance testing device is needed in reality to test the range of car battery packs. It can simulate the damping effect of different forces when the vehicle is moving, detect the output power of the car battery pack, and achieve the purpose of multi-functional performance testing of car battery packs. Utility Model Content

[0005] To address the aforementioned problems, the purpose of this invention is to provide a lithium battery performance testing device that simulates the vehicle's movement under different ambient temperatures to test the range of the car battery pack.

[0006] The objective of this utility model can be achieved through the following technical solution: a lithium battery performance testing device, comprising:

[0007] The constant temperature chamber is set on the test vehicle and has a built-in car battery pack, which is connected to a resistance tester.

[0008] The simulated transmission mechanism, installed on the test vehicle, simulates the vehicle's movement based on the power of the car battery pack, and verifies the range of the car battery pack.

[0009] By combining a constant temperature chamber with a resistance tester, the battery's internal resistance, voltage, and temperature adaptability can be detected simultaneously, solving the problem that traditional tests can only measure static parameters at room temperature. By simulating the power load of a real vehicle through a transmission mechanism simulation, the battery's range degradation under dynamic operating conditions can be quantified, and range assessment can be carried out dynamically.

[0010] As a further improvement of this utility model, it also includes:

[0011] The pressure testing assembly, located on the test vehicle, combines with the simulation transmission mechanism to simulate the damping effect of different forces during vehicle simulation motion; the controller, located on the test vehicle, is used to control the pressure testing assembly and the simulation transmission mechanism.

[0012] By simulating acceleration and braking scenarios with adjustable damping, the battery output power fluctuations can be accurately detected.

[0013] As a further improvement of this utility model, the constant temperature chamber is fixedly equipped with a constant temperature device, which can regulate the temperature inside the constant temperature chamber and accurately control the high or low temperature environment, which is beneficial for verifying the performance stability of the car battery pack under extreme temperatures.

[0014] As a further embodiment of this utility model, the simulation transmission mechanism includes a motor, the output end of which is connected to a speed-changing gear set, and the speed-changing gear set is connected to a drive shaft; the speed-changing gear set is used to reproduce the changes in the vehicle's transmission ratio, and the energy consumption characteristics of the battery at different vehicle speeds are detected.

[0015] As a further embodiment of this utility model, the pressure testing assembly includes an electric push rod, the piston rod of the electric push rod is driven by a spring, the spring is fixedly connected to a slide block, the slide block is fixedly connected to a C-shaped damping sleeve, and the C-shaped damping sleeve elastically presses against the drive shaft.

[0016] Spring buffers prevent mechanical shocks, more closely mimicking the gradual change in resistance under real road conditions. Elastic contact reduces hard friction between the drive shaft and the damping sleeve, extending equipment life.

[0017] As a further embodiment of this utility model, the transmission connection of the gear set includes two transmission shafts, and the pressure testing assembly includes two electric push rods, which are respectively located at both ends of the transmission shafts; the symmetrical layout avoids shaft wear caused by unilateral pressure and improves the testing accuracy.

[0018] As a further improvement of this utility model, a cover is rotatably installed on the upper end of the constant temperature chamber, and a resistance detector is elastically snapped onto the cover.

[0019] The instrument can be installed without tools, facilitating maintenance or model replacement. The flexible snap-fit ​​design prevents the instrument from loosening when the test vehicle is moved, ensuring data stability.

[0020] As a further embodiment of this utility model, the electric push rod is fixedly connected to a base, and the base is fixedly mounted on the test vehicle.

[0021] As a further embodiment of this utility model, both ends of the drive shaft are rotatably connected to L-shaped plates, which are fixedly mounted on the test vehicle. The L-shaped plates are connected to the C-shaped damping sleeves by insertion. The insertion structure prevents the drive shaft from moving radially, while allowing axial fine adjustment to adapt to changes in the pressure of the damping sleeves.

[0022] As a further improvement of this invention, a damping rubber pad is detachably mounted on the C-shaped damping sleeve, and a sliding block is mounted on the test vehicle. This allows for quick and easy replacement of rubber pads of different hardness to simulate varying road resistance; the sliding block ensures that the damping sleeve remains in contact with the drive shaft, preventing localized wear caused by bias pressure.

[0023] The beneficial effects of this utility model are:

[0024] 1. This utility model uses a constant temperature device to regulate the internal temperature of the constant temperature chamber, simulating the range of a car battery pack under different ambient temperatures. It uses a resistance detector to measure the internal resistance and voltage of the car battery pack, thereby realizing the performance testing of the car battery pack. The car battery pack powers the motor for range testing, and the range power supply capability of the car battery pack can be detected.

[0025] 2. This utility model, through the combination of a constant temperature chamber and a constant temperature device, can accurately control the temperature of the test environment, simulate the performance of automotive battery packs under extreme conditions such as high and low temperatures, solve the problem that traditional testers cannot assess the impact of temperature on battery range, provide data support for battery design optimization, and a single device can replace multiple devices such as traditional separate temperature test chambers, internal resistance testers, and power load platforms, which can reduce equipment investment and test cycle, and is suitable for multiple stages of battery production, R&D and quality control.

[0026] 3. This utility model simulates the power transmission path of a real vehicle by using a motor, a gear set, and a drive shaft. Combined with the electric push rod and C-shaped damping sleeve of the pressure testing component, the damping force of the drive shaft is dynamically adjusted to reproduce the vehicle's acceleration, braking, and other operating conditions, and to accurately detect the output power and stability of the car battery pack under different loads.

[0027] 4. This utility model uses adjustable damping technology with elastic compression between the spring and the slide to avoid the instantaneous impact caused by traditional mechanical brakes, and more closely reflects the changes in actual driving resistance.

[0028] 5. This utility model integrates a resistance detector directly into the card slot of the cover, which can complete the synchronous measurement of battery internal resistance and voltage without additional wiring, thus improving testing efficiency.

[0029] 6. This utility model continuously supplies power to the motor through the car battery pack, and combines the controller to record the running time and energy consumption, quantifies the range degradation characteristics of the battery under different temperatures and loads, and provides accurate range assessment results. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall structure of the battery performance testing device of this utility model;

[0031] Figure 2 This is a partial cross-sectional view of the battery performance testing device of this utility model;

[0032] Figure 3 This utility model relates to a battery performance testing device. Figure 2 Enlarged structural diagram at point A in the middle.

[0033] 1. Test vehicle;

[0034] 2. Incubator; 21. Temperature control device; 22. Cover; 23. Mounting bracket; 24. L-shaped base;

[0035] 3. Resistance tester;

[0036] 4. Simulated transmission mechanism; 41. Motor; 42. Gearbox; 43. Gear set; 44. Drive shaft; 45. L-shaped plate;

[0037] 5. Controller;

[0038] 6. Pressure testing assembly; 61. Electric push rod; 62. Base; 63. Spring; 64. Slide; 65. C-shaped damping sleeve;

[0039] 7. Car battery pack. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of the 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.

[0041] like Figure 1 As shown, this utility model discloses a lithium battery performance testing device, including components such as a test vehicle 1, a constant temperature chamber 2, a simulation transmission mechanism 4, a pressure testing assembly 6, and a controller 5, wherein:

[0042] Test vehicle 1 is equipped with wheels at the bottom and handles on the side for easy movement.

[0043] The constant temperature chamber 2 has an L-shaped base 24 fixedly connected to its bottom surface. The L-shaped base 24 is fixedly mounted on the test vehicle 1. The constant temperature chamber 2 contains a car battery pack 7. A constant temperature device 21 is also fixedly installed inside the constant temperature chamber 2. A cover 22 is rotatably mounted on the upper end of the constant temperature chamber 2. A retainer 23 is fixedly mounted on the upper surface of the cover 22. The retainer 23 is elastically engaged with a resistance detector 3. The resistance detector 3 can be model HM3915. The resistance detector 3 is electrically connected to the car battery pack 7 through a resistance measuring wire. The car battery pack 7 is electrically connected to the motor 41, the controller 5, and the electric push rod 61 through wires.

[0044] The temperature inside the constant temperature chamber 2 can be adjusted by the constant temperature device 21 to simulate the power range of the car battery pack 7 under different ambient temperatures. The internal resistance and voltage of the car battery pack 7 can be measured by the resistance detector 3 to realize the performance test of the car battery pack 7.

[0045] like Figure 2 As shown, the simulation transmission mechanism 4 is installed on the test vehicle 1, and the simulation transmission mechanism 4 simulates the movement of the vehicle by relying on the power of the car battery pack 7.

[0046] The simulation transmission mechanism 4 includes a motor 41, which is fixed on the test vehicle 1. The output end of the motor 41 is connected to a speed-changing gear set 43, and the speed-changing gear set 43 is connected to a transmission shaft 44.

[0047] A simulated transmission mechanism 4 is installed on the test vehicle 1. The car battery pack 7 can power the motor 41. The output end of the motor 41 drives the transmission gear set 43 and the transmission shaft 44 to rotate, which can test the driving power supply capability of the car battery pack 7.

[0048] like Figure 3 As shown, the pressure testing component 6 is installed on the test vehicle 1 and is used in conjunction with the simulation transmission mechanism 4 to simulate the damping effect of different forces when the vehicle is in simulated motion.

[0049] The pressure testing assembly 6 includes an electric push rod 61, which is fixedly connected to a base 62. The base 62 is fixedly mounted on the test vehicle 1. The piston rod of the electric push rod 61 is driven by a spring 63. The spring 63 is fixedly connected to a slide 64. The slide 64 is fixedly connected to a C-shaped damping sleeve 65. The C-shaped damping sleeve 65 elastically presses against the drive shaft 44.

[0050] Both ends of the drive shaft 44 are rotatably connected to L-shaped plates 45, which are fixed on the test vehicle 1. The L-shaped plates 45 are inserted and connected to the C-shaped damping sleeve 65. The drive shaft 44 moves through the gearbox 42, and the end of the drive shaft 44 is rotatably connected to the L-shaped plates 45, so that the drive shaft 44 can rotate stably. The C-shaped damping sleeve 65 elastically holds the drive shaft 44, which can simulate the phenomenon of the drive shaft 44 being obstructed.

[0051] A damping rubber pad is detachably installed on the C-shaped damping sleeve 65. The slide block 64 is slidably mounted on the test vehicle 1. The C-shaped damping sleeve 65 is elastically compressed by the spring 63 and elastically compressed by the damping rubber pad to the drive shaft 44.

[0052] The controller 5, located on the test vehicle 1, is used to control the pressure test assembly 6 and the motor 41, etc. The controller 5 can be electrically connected to the car battery pack 7, the motor 41 and the electric push rod 61 using PLC technology and control circuits. It is a mature control technology and will not be described in detail. The controller 5 can control the speed of the motor 41 and the stroke of the piston rod of the electric push rod 61.

[0053] The principle of this invention is as follows: During performance testing of the battery pack 7 of a new energy vehicle, the battery pack 7 can be placed inside a constant temperature chamber 2. The temperature inside the chamber 2 can be adjusted by a constant temperature device 21 to simulate the battery pack 7's energy range under different ambient temperatures. The internal resistance and voltage of the battery pack 7 can be measured by a resistance meter 3 to achieve performance testing. The controller 5, using PLC technology and control circuitry, is electrically connected to the battery pack 7, motor 41, and electric push rod 61 to control the speed and electric... The stroke of the piston rod of push rod 61 enables the electric motor 41, which powers the car battery pack 7, to rotate. The output end of motor 41 drives the transmission gear set 43 and the transmission shaft 44 to rotate. This can detect the driving power supply capability of the car battery pack 7. The controller 5 can control the operation of electric push rod 61. The extension and retraction of the piston rod of electric push rod 61 can be changed by the deformation of spring 63, which in turn causes the C-shaped damping sleeve 65 to change the force pressing the transmission shaft 44. This can simulate the damping rotation effect of transmission shaft 44, thereby simulating and detecting the output power of car battery pack 7, and achieving the purpose of multi-functional performance testing.

[0054] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and concept of this utility model, should be included within the scope of protection of this utility model.

[0055] It should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" 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.

[0056] 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.

[0057] 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.

[0058] 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.

Claims

1. A lithium battery performance testing device, characterized in that, include: A constant temperature chamber (2) is installed on the test vehicle (1) and has a built-in car battery pack (7). The car battery pack (7) is connected to a resistance tester (3). The simulated transmission mechanism (4) is installed on the test vehicle (1) and simulates the vehicle movement based on the power of the car battery pack (7) to test the range of the car battery pack (7).

2. The lithium battery performance testing device according to claim 1, characterized in that, Also includes: The pressure testing component (6) is installed on the test vehicle (1) and combined with the simulation transmission mechanism (4) to simulate the damping effect of different forces when the vehicle is in simulated motion; The controller (5) is located on the test vehicle (1) and is used to control the pressure test assembly (6) and the simulation transmission mechanism (4).

3. The lithium battery performance testing device according to claim 2, characterized in that, The constant temperature chamber (2) is fixedly equipped with a constant temperature device (21), which can regulate the temperature inside the constant temperature chamber (2).

4. The lithium battery performance testing device according to claim 3, characterized in that, The constant temperature chamber (2) is rotatably mounted with a cover (22), and a resistance detector (3) is elastically snapped onto the cover (22).

5. The lithium battery performance testing device according to claim 2, characterized in that, The simulated transmission mechanism (4) includes a motor (41), the output end of which is connected to a speed-changing gear set (43), and the speed-changing gear set (43) is connected to a transmission shaft (44).

6. The lithium battery performance testing device according to claim 5, characterized in that, The pressure testing assembly (6) includes an electric push rod (61), the piston rod of the electric push rod (61) is driven by a spring (63), the spring (63) is fixedly connected to a slide (64), the slide (64) is fixedly connected to a C-shaped damping sleeve (65), and the C-shaped damping sleeve (65) elastically presses against the drive shaft (44).

7. The lithium battery performance testing device according to claim 6, characterized in that, The gear set (43) is connected to two drive shafts (44), and the pressure test assembly (6) includes two electric push rods (61), which are respectively located at both ends of the drive shafts (44).

8. The lithium battery performance testing device according to claim 7, characterized in that, The electric push rod (61) is fixedly connected to a base (62), and the base (62) is fixedly mounted on the test vehicle (1).

9. A lithium battery performance testing device according to claim 7, characterized in that, Both ends of the drive shaft (44) are rotatably connected to L-shaped plates (45), which are fixed on the test vehicle (1). The L-shaped plates (45) are inserted into and connected to the C-shaped damping sleeve (65).

10. A lithium battery performance testing device according to claim 6, characterized in that, The C-shaped damping sleeve (65) is detachably fitted with a damping rubber pad, and the slide block (64) is slidably mounted on the test vehicle (1).

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