CVTN Testing Device and Testing Method for a Battery Module

Abstract

The present invention discloses a CVTN test device and a test method for a battery module, which includes a control box body, a test box body and a temperature control system. The control box body is fixedly connected to the left side of the test box body. Support feet are fixedly connected to the bottoms of both the control box body and the test box body. The test box body is divided into upper and lower layers. A live simulation mechanism is arranged inside the upper layer of the test box body. The live simulation mechanism includes a base, the base is fixedly connected to the top of the control box body, two sliding sleeves are fixedly connected to the bottom of the base, and a sliding rod is slidably connected to the inner surface of the sliding sleeve. The present invention relates to the technical field of battery modules. For the CVTN test device and test method of the battery module, the input motor is started to make the bidirectional threaded rod rotate, so as to adjust the distance between the two first mounting brackets, and manually adjust the distance between the two second mounting brackets, so that battery packs of different sizes can be tested. After installation, the vibration motor is started to make the support plate vibrate up and down.

Description

Technical Field

[0001] The present invention relates to the technical field of battery modules, and particularly to a CVTN test device and a test method for a battery module. Background Art

[0002] The lithium battery module is an important part of the battery pack in new energy vehicles. The performance of its battery, such as energy density, capacity, voltage, etc., are key factors affecting the cruising range, service life, safety and reliability of the battery pack in new energy vehicles.

[0003] The existing CVTN test device only detects and tests a single battery module, but does not detect the working conditions after multiple battery modules are assembled together into a battery pack. In addition, the detection of the battery under different working conditions is not sufficient. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the present invention provides a CVTN test device and a test method for a battery module, which solve the problems that the existing test device does not detect the situation after the battery modules are assembled together and the working conditions of the battery under different working conditions need to be detected.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions: A CVTN test device for a battery module, including a control box body, a test box body and a temperature control system. The control box body is fixedly connected to the left side of the test box body. Support feet are fixedly connected to the bottoms of both the control box body and the test box body. It is characterized in that: The test box body is divided into upper and lower layers. A live simulation mechanism is arranged inside the upper layer of the test box body. The live simulation mechanism includes a base, the base is fixedly connected to the top of the control box body. Two sliding sleeves are fixedly connected to the bottom of the base. A sliding rod is slidably connected to the inner surface of the sliding sleeve. The bottoms of the two sliding rods are fixedly connected to a support plate. A vibration spring is sleeved on the surface of the sliding rod between the sliding sleeve and the relative side of the support plate. Two first motor boxes are fixedly connected to the top of the support plate. A vibration motor is fixedly connected inside the first motor box. The output end of the vibration motor penetrates through the first motor box and extends to the outside of the first motor box. The output end of the vibration motor is fixedly connected to a semi-circular disk. An installation component is arranged below the support plate.

[0006] Preferably, the mounting assembly includes a first limiting groove and a second limiting groove formed inside the support plate. The first limiting groove is in front of the second limiting groove. A bidirectional threaded rod is rotatably connected between the left and right sides of the inner wall of the first limiting groove. A guide rod is fixedly connected between the left and right sides of the inner wall of the second limiting groove. Both sides of the surface of the bidirectional threaded rod are threadedly connected with a first connecting block. The surface of the guide rod is slidably connected with two second connecting blocks on the left and right. One end of the first connecting block and the second connecting block penetrating below the support plate are both fixedly connected with a first mounting bracket. A chute is formed at the bottom of the support plate. The chute is slidably connected with the inner surface of the chute through a connecting block. The front and back of the first mounting bracket are both slidably connected with a second mounting bracket. A second motor box is fixedly connected to the right side of the support plate. An input motor is fixedly connected to the right side of the inner wall of the second motor box. The output end of the input motor is fixedly connected to one end of the bidirectional threaded rod.

[0007] Preferably, two hydraulic cylinders are fixedly connected to the bottom of the inner wall of the test box body. The output ends of both hydraulic cylinders are fixedly connected with a workbench. Two hydraulic devices are fixedly connected to the top of the workbench. The output ends of both hydraulic devices are fixedly connected with a push plate. The push plate is slidably connected with the top of the workbench.

[0008] Preferably, the temperature control system is arranged in the lower layer of the test box body. The temperature control system includes a condenser, a buffer tank and a flow valve. The condenser is fixedly connected between the top and the top of the inner wall of the lower layer of the test box body. A protective box is fixedly connected to the right side of the inner wall of the upper layer of the test box body. An evaporator is fixedly connected between the top and the bottom of the inner wall of the protective box. A fan is arranged inside the protective box. A compressor is fixedly connected to the bottom of the inner wall of the test box body.

[0009] Preferably, the liquid inlet of the condenser is communicated with the liquid outlet of the compressor through a connecting pipe. The liquid outlet of the condenser is connected with the liquid inlet of the buffer tank through a connecting pipe. The liquid outlet of the buffer tank is connected with the liquid inlet of the flow valve through a connecting pipe.

[0010] Preferably, the liquid outlet of the flow valve is connected with the liquid inlet of the evaporator through a connecting pipe. The liquid outlet of the evaporator is connected with the other liquid inlet of the flow valve through a connecting pipe. The liquid outlet of the flow valve is connected with the liquid inlet of the compressor through a connecting pipe.

[0011] Preferably, a plurality of semi-circular grooves are equidistantly formed at the top of the workbench. Ball bearings are arranged inside the semi-circular grooves. The signal access end of the control box body is connected with a battery pack plug and two battery module column head clamps. The battery pack plug and the battery module column head clamps are both inside the test box body. A controller is arranged on the front surface of the control box body.

[0012] The present invention also discloses a test method for a CVTN test device of a battery module, which specifically includes the following steps:

[0013] Step 1: First, detect the battery module. Clamp the battery module stud clamp on the studs of the battery module to detect the current, voltage, and capacity of a single battery module. After the detection is completed, assemble the battery module.

[0014] Step 2: After assembling into a battery pack, place the entire battery pack above the workbench. First, start the hydraulic actuator. The two hydraulic actuators work to make the two push plates move closer to the middle, thereby centering the battery pack. The ball bearings provided on the workbench can facilitate the movement of the battery's position.

[0015] Step 3: After the battery pack is centered, connect the battery pack plug to the battery pack. Then start the input motor. The rotation of the input motor drives the bidirectional threaded rod to rotate. The rotation of the bidirectional threaded rod drives the two first connection blocks to move towards the middle or towards both sides, thereby adjusting the distance between the two first mounting brackets. Manually adjust the distance of the second mounting bracket to match the size of the battery pack. Then start the hydraulic cylinder. The hydraulic cylinder works to push the workbench upward, so that the mounting holes of the battery pack correspond to the mounting holes on the first mounting bracket and the second mounting bracket, and install them with mounting bolts. First, start the vibration motor. The rotation of the vibration motor drives the semi-circular disk to rotate, and through the cooperation of the vibration spring, the support plate vibrates up and down, driving the battery pack to vibrate up and down, thereby simulating the scenario of a car passing through a bumpy road surface for detection. After this detection is completed, start the temperature control system to simulate extremely cold and extremely hot conditions, and then detect and test the working conditions of the battery pack.

[0016] Beneficial effects

[0017] The present invention provides a CVTN test device and a test method for a battery module. Compared with the prior art, it has the following beneficial effects:

[0018] 1. For the CVTN test device and test method of this battery module, a live simulation mechanism is provided inside the upper layer of the test box. The live simulation mechanism includes a base, the base is fixedly connected to the top of the control box, and the bottom of the base is fixedly connected with two left and right sliding sleeves. Starting the input motor makes the bidirectional threaded rod rotate, thereby adjusting the distance between the two first mounting brackets, and manually adjusting the distance between the two second mounting brackets, so that battery packs of different sizes can be tested. After installation, start the vibration motor to make the support plate vibrate up and down, thereby simulating the situation of a car driving on a bumpy road surface, and testing the working conditions of the battery and the installation stability of the battery pack.

[0019] 2. The CVTN test device and test method for this battery module are such that there are two left and right hydraulic cylinders fixedly connected to the bottom of the inner wall of the test chamber. The output ends of both hydraulic cylinders are fixedly connected to a workbench. There are two left and right hydraulic devices fixedly connected to the top of the workbench. When installing the battery pack, the battery pack is lifted by the hydraulic cylinders and the workbench, and the push plate is pushed by the hydraulic device to center the battery pack, thus facilitating the installation.

[0020] 3. The CVTN test device and test method for this battery module are such that the temperature control system is arranged in the lower layer of the test chamber. The temperature control system includes a condenser, a buffer tank and a flow valve. The condenser is fixedly connected between the top of the inner wall of the lower layer of the test chamber and the top. The temperature inside the test chamber is controlled by the temperature control system to simulate the working conditions of the battery in extremely cold and hot situations, thereby enhancing the diversity of test results. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic external view of the present invention;

[0022] Figure 2 is a cross-sectional view of the present invention;

[0023] Figure 3 is a side cross-sectional view of the present invention;

[0024] Figure 4 is a bottom view of the support plate of the present invention;

[0025] Figure 5 is a side cross-sectional view of the support plate of the present invention;

[0026] Figure 6 is a partial schematic view of the workbench of the present invention.

[0027] In the figure: 1 control box, 2 test box, 3 support feet, 4 temperature control system, 41 condenser, 42 buffer tank, 43 flow valve, 44 protection box, 45 evaporator, 46 fan, 47 compressor, 5 actual situation simulation mechanism, 51 base, 52 sliding sleeve, 53 sliding rod, 54 support plate, 55 vibration spring, 56 first motor box, 57 vibration motor, 58 semi-circular disc, 6 installation component, 61 first limit groove, 62 second limit groove, 63 bidirectional threaded rod, 64 guide rod, 65 first connection block, 66 second connection block, 67 chute, 68 first mounting bracket, 69 second mounting bracket, 610 second motor box, 611 input motor, 7 hydraulic cylinder, 8 workbench, 9 hydraulic device, 10 push plate, 11 battery pack plug, 12 battery module column head clamp, 13 controller, 14 semi-circular groove, 15 ball. DETAILED DESCRIPTION OF THE INVENTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] Please refer to Figures 1-6 , the present invention provides a technical solution: a CVTN test device for a battery module, including a control box body 1, a test box body 2, and a temperature control system 4. The control box body 1 is fixedly connected to the left side of the test box body 2. Support feet 3 are fixedly connected to the bottoms of both the control box body 1 and the test box body 2. The test box body 2 is divided into upper and lower layers. A live simulation mechanism 5 is arranged inside the upper layer of the test box body 2. The live simulation mechanism 5 includes a base 51, the base 51 is fixedly connected to the top of the control box body 1. Two left and right sliding sleeves 52 are fixedly connected to the bottom of the base 51. A sliding rod 53 is slidably connected to the inner surface of the sliding sleeve 52. The bottoms of the two sliding rods 53 are fixedly connected to a support plate 54. A vibration spring 55 is sleeved on the surface of the sliding rod 53 between the opposite sides of the sliding sleeve 52 and the support plate 54. Two front and rear first motor boxes 56 are fixedly connected to the top of the support plate 54. A vibration motor 57 is fixedly connected inside the first motor box 56. The output end of the vibration motor 57 penetrates through the first motor box 56 and extends to the outside of the first motor box 56. A semi-circular disk 58 is fixedly connected to the output end of the vibration motor 57. An installation component 6 is arranged below the support plate 54.

[0030] The installation component 6 includes a first limit groove 61 and a second limit groove 62 opened inside the support plate 54. The first limit groove 61 is in front of the second limit groove 62. A bidirectional threaded rod 63 is rotatably connected between the left and right sides of the inner wall of the first limit groove 61. A guide rod 64 is fixedly connected between the left and right sides of the inner wall of the second limit groove 62. The two sides of the surface of the bidirectional threaded rod 63 are threadedly connected with first connection blocks 65. The surface of the guide rod 64 is slidably connected with two left and right second connection blocks 66. The ends of the first connection blocks 65 and the second connection blocks 66 that penetrate to the lower side of the support plate 54 are both fixedly connected with first mounting frames 68. A chute 67 is opened at the bottom of the support plate 54. The chute 67 is slidably connected with the inner surface of the chute 67 through a connection block. The front and back of the first mounting frame 68 are both slidably connected with a second mounting frame 69. A second motor box 610 is fixedly connected to the right side of the support plate 54. An input motor 611 is fixedly connected to the right side of the inner wall of the second motor box 610. The output end of the input motor 611 is fixedly connected to one end of the bidirectional threaded rod 63.

[0031] At the bottom of the inner wall of the test box body 2, there are two hydraulic cylinders 7 fixed and connected on the left and right. The output ends of the two hydraulic cylinders 7 are both fixedly connected with a workbench 8. On the top of the workbench 8, there are two hydraulic devices 9 fixedly connected on the left and right. The output ends of the two hydraulic devices 9 are both fixedly connected with a push plate 10, and the push plate 10 is slidably connected with the top of the workbench 8.

[0032] The temperature control system 4 is arranged in the lower layer of the test box body 2. The temperature control system 4 can simulate an ambient temperature range of -30°C to 50°C. The temperature control system 4 includes a condenser 41, a buffer tank 42 and a flow valve 43. The condenser 41 is fixedly connected between the top and the top of the inner wall of the lower layer of the test box body 2. On the right side of the inner wall of the upper layer of the test box body 2, there is a protective box 44 fixedly connected. Between the top and the bottom of the inner wall of the protective box 44, there is an evaporator 45 fixedly connected. Inside the protective box 44, there is a fan 46 arranged. At the bottom of the inner wall of the test box body 2, there is a compressor 47 fixedly connected.

[0033] The liquid inlet of the condenser 41 is communicated with the liquid outlet of the compressor 47 through a connecting pipe. The liquid outlet of the condenser 41 is connected with the liquid inlet of the buffer tank 42 through a connecting pipe. The liquid outlet of the buffer tank 42 is connected with the liquid inlet of the flow valve 43 through a connecting pipe.

[0034] The liquid outlet of the flow valve 43 is connected with the liquid inlet of the evaporator 45 through a connecting pipe. The liquid outlet of the evaporator 45 is connected with the other liquid inlet of the flow valve 43 through a connecting pipe. The liquid outlet of the flow valve 43 is connected with the liquid inlet of the compressor 47 through a connecting pipe.

[0035] On the top of the workbench 8, a plurality of semi-circular grooves 14 are equidistantly arranged. Inside the semi-circular grooves 14, there are balls 15 arranged. The signal access end of the control box body 1 is connected with a battery pack plug 11 and two battery module stud clamps 12. The battery pack plug 11 and the battery module stud clamps 12 are both located inside the test box body 2. On the front surface of the control box body 1, there is a controller 13 arranged.

[0036] The present invention also discloses a test method for a CVTN test device of a battery module, which specifically includes the following steps:

[0037] Step 1: First, detect the battery module. Clamp the battery module stud clamp 12 on the stud of the battery module, so as to detect the current, voltage and capacity of a single battery module. After the detection is completed, assemble the battery module.

[0038] Step 2: After assembling into a battery pack, place the whole battery pack above the workbench 8. First, start the hydraulic device 9. The two hydraulic devices 9 work to make the two push plates 10 move closer to the middle, so as to center the battery pack. The balls 15 arranged on the workbench 8 can facilitate the movement of the position of the battery.

[0039] Step 3: After the battery pack is centered, connect the battery pack plug 11 to the battery pack, and then start the input motor 611. The rotation of the input motor 611 drives the rotation of the bidirectional threaded rod 63. The rotation of the bidirectional threaded rod 63 drives the two first connection blocks 65 to move towards the middle or towards both sides, thereby adjusting the distance between the two first mounting brackets 68. Manually adjust the distance of the second mounting bracket 69 to match the size of the battery pack. Then start the hydraulic cylinder 7. The hydraulic cylinder 7 works to push the workbench 8 upward, so that the mounting holes of the battery pack correspond to the mounting holes on the first mounting bracket 68 and the second mounting bracket 69, and install them with mounting bolts. First, start the vibration motor 57. The rotation of the vibration motor 57 drives the rotation of the semi-circular disk 58, and through the cooperation of the vibration springs 55, the support plate 54 vibrates up and down, driving the battery pack to vibrate up and down, thereby simulating the scenario of the car passing through a bumpy road surface for detection. After this detection is completed, start the temperature control system 4 to simulate extremely cold and extremely hot conditions, and then detect and test the working condition of the battery pack.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0041] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A CVTN test device for a battery module, comprising a control box body (1), a test box body (2) and a temperature control system (4). The control box body (1) is fixedly connected to the left side of the test box body (2). Support feet (3) are fixedly connected to the bottoms of both the control box body (1) and the test box body (2). It is characterized in that: The test box body (2) is divided into upper and lower layers. Inside the upper layer of the test box body (2), there is a live simulation mechanism (5). The live simulation mechanism (5) includes a base (51). The base (51) is fixedly connected to the top of the control box body (1). At the bottom of the base (51), there are two sliding sleeves (52) fixedly connected on the left and right. The inner surface of the sliding sleeve (52) is slidably connected to a sliding rod (53). The bottoms of the two sliding rods (53) are fixedly connected to a support plate (54). A vibration spring (55) is sleeved on the surface of the sliding rod (53) between the sliding sleeve (52) and the support plate (54) on the opposite side. At the top of the support plate (54), there are two first motor boxes (56) fixedly connected in the front and back. Inside the first motor box (56), there is a vibration motor (57) fixedly connected. The output end of the vibration motor (57) penetrates through the first motor box (56) and extends to the outside of the first motor box (56). The output end of the vibration motor (57) is fixedly connected to a semi-circular plate (58). Below the support plate (54), there is an installation component (6). At the bottom of the inner wall of the test box body (2), there are two hydraulic cylinders (7) fixedly connected on the left and right. The output ends of the two hydraulic cylinders (7) are both fixedly connected to a workbench (8). At the top of the workbench (8), there are two hydraulic devices (9) fixedly connected on the left and right. The output ends of the two hydraulic devices (9) are both fixedly connected to a push plate (10). The push plate (10) is slidably connected to the top of the workbench (8). The temperature control system (4) is arranged in the lower layer of the test box body (2). The temperature control system (4) includes a condenser (41), a buffer tank (42) and a flow valve (43). The condenser (41) is fixedly connected between the top and the top of the inner wall of the lower layer of the test box body (2). On the right side of the inner wall of the upper layer of the test box body (2), there is a protective box (44) fixedly connected. Between the top and the bottom of the inner wall of the protective box (44), there is an evaporator (45) fixedly connected. Inside the protective box (44), there is a fan (46). At the bottom of the inner wall of the test box body (2), there is a compressor (47) fixedly connected.

2. The CVTN test device for a battery module according to claim 1, wherein: The installation component (6) includes a first limiting groove (61) and a second limiting groove (62) opened inside the support plate (54). The first limiting groove (61) is located in front of the second limiting groove (62). A bidirectional threaded rod (63) is rotatably connected between the left and right sides of the inner wall of the first limiting groove (61). A guide rod (64) is fixedly connected between the left and right sides of the inner wall of the second limiting groove (62). Both sides of the surface of the bidirectional threaded rod (63) are threadedly connected with first connection blocks (65). The surface of the guide rod (64) is slidably connected with two second connection blocks (66) on the left and right. One end of the first connection block (65) and the second connection block (66) that penetrate below the support plate (54) are fixedly connected with a first mounting bracket (68). A chute (67) is opened at the bottom of the support plate (54). The chute (67) is slidably connected with the inner surface of the chute (67) through a connection block. The front and back of the first mounting bracket (68) are slidably connected with a second mounting bracket (69). A second motor box (610) is fixedly connected to the right side of the support plate (54). An input motor (611) is fixedly connected to the right side of the inner wall of the second motor box (610). The output end of the input motor (611) is fixedly connected to one end of the bidirectional threaded rod (63).

3. A CVTN test device for a battery module according to claim 2, characterized in that: The liquid inlet of the condenser (41) is communicated with the liquid outlet of the compressor (47) through a connecting pipe. The liquid outlet of the condenser (41) is connected to the liquid inlet of the buffer tank (42) through a connecting pipe. The liquid outlet of the buffer tank (42) is connected to the liquid inlet of the flow valve (43) through a connecting pipe.

4. The CVTN test device for a battery module according to claim 3, characterized in that: The liquid outlet of the flow valve (43) is connected to the liquid inlet of the evaporator (45) through a connecting pipe. The liquid outlet of the evaporator (45) is connected to the other liquid inlet of the flow valve (43) through a connecting pipe. The liquid outlet of the flow valve (43) is connected to the liquid inlet of the compressor (47) through a connecting pipe.

5. The CVTN test device for a battery module according to claim 4, wherein: A plurality of semi-circular grooves (14) are equidistantly opened at the top of the workbench (8). Ball beads (15) are arranged inside the semi-circular grooves (14). The signal access end of the control box body (1) is connected with a battery pack plug (11) and two battery module stud clamps (12). The battery pack plug (11) and the battery module stud clamps (12) are both located inside the test box body (2). A controller (13) is arranged on the front surface of the control box body (1).

6. The testing method of a CVTN testing device for a battery module according to claim 5, characterized in that: Specifically, it includes the following steps: Step 1: First, detect the battery module. Clamp the battery module stud clamp (12) on the stud of the battery module to detect the current, voltage, and capacity of a single battery module. After the detection is completed, assemble the battery module. Step 2: After assembling into a battery pack, place the whole battery pack above the workbench (8). First, start the hydraulic device (9). The two hydraulic devices (9) work to make the two push plates (10) move closer to the middle, so as to center the battery pack. The ball beads (15) arranged on the workbench (8) can facilitate the movement of the position of the battery. Step 3: After the battery pack is centered, connect the battery pack plug (11) to the battery pack, and then start the input motor (611). The rotation of the input motor (611) drives the rotation of the bidirectional threaded rod (63). The rotation of the bidirectional threaded rod (63) drives the two first connection blocks (65) to move towards the middle or towards both sides, thereby adjusting the distance between the two first mounting brackets (68). Then manually adjust the distance of the second mounting bracket (69) to match the size of the battery pack. Next, start the hydraulic cylinder (7). The hydraulic cylinder (7) works to push the workbench (8) upward, so that the mounting holes of the battery pack correspond to the mounting holes on the first mounting bracket (68) and the second mounting bracket (69), and install them with mounting bolts. First, start the vibration motor (57). The rotation of the vibration motor (57) drives the rotation of the semi-circular disc (58), and through the cooperation of the vibration springs (55), the support plate (54) vibrates up and down, driving the battery pack to vibrate up and down, thus simulating the scenario of the car passing through a bumpy road surface for testing. After this test is completed, start the temperature control system (4) to simulate extremely cold and extremely hot conditions, and then test and evaluate the working condition of the battery pack.

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