Lithium battery capacity grading testing device

Abstract

The utility model provides a lithium battery capacity grading testing device which comprises a hollow press bed frame and a press bed arranged in the press bed frame, the press bed frame comprises a press bed frame frame, a fire exit door and a water cooling system, and the press bed comprises a bottom frame, a lifting frame, a top frame, a detection module and a tray. The bottom frame and the top frame are fixedly connected through a main guide shaft, the upper side and the lower side of the top frame are provided with an air cylinder and the detection module respectively, the tray is fixed to the lifting frame, and when capacity grading testing is carried out, the air cylinder drives the lifting frame to move upwards, and the detection module is fixed to the lifting frame. And the lithium battery in the tray is in contact with the detection module. The lithium battery capacity grading testing device has the advantages of being convenient to deploy, high in charging and discharging efficiency and good in temperature control effect.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery testing, in particular to a power lithium battery grading and capacity testing device. Background Technique

[0002] With the rise of the new energy industry, the technological research and development and development prospects of lithium batteries have received key attention from people, and their application fields are also becoming more and more extensive. Grading and capacity is an essential and important link in the production process of lithium batteries.

[0003] In the prior art, the devices that can support grading and capacity mostly adopt a split design, resulting in a large floor area and inconvenient deployment and installation. Existing grading and capacity power supplies all use AC380V power supply and finally convert it into DC5V to charge the battery, with low charge and discharge efficiency. Content of the Utility Model

[0004] The purpose of the utility model is to provide a power lithium battery grading and capacity testing device with convenient deployment and high charge and discharge efficiency.

[0005] In an embodiment of the utility model, a lithium battery grading and capacity testing device is provided, which includes a hollow press bed frame and a press bed arranged in the press bed frame. The press bed frame includes a press bed frame framework, a fire door arranged at the front end of the press bed frame framework, and a water cooling system arranged on both sides inside the press bed frame framework. The press bed includes a bottom frame, a lifting frame, a top frame, a detection module, and a tray. The bottom frame is fixed to the inner bottom surface of the press bed frame framework and is fixedly connected to the top frame through a main guide shaft. The lifting frame is sleeved on the main guide shaft through a linear bearing and is installed between the bottom frame and the top frame. Cylinders and the detection module are respectively arranged on the upper and lower sides of the top frame. The tray is fixed to the lifting frame. When performing grading and capacity testing, the cylinder drives the lifting frame to move upward, so that the lithium battery in the tray contacts the detection module.

[0006] In an embodiment of the utility model, the press bed frame framework is installed on the ground by means of bottom feet.

[0007] In an embodiment of the utility model, the press bed further includes a fire alarm device arranged on the top frame.

[0008] In an embodiment of the utility model, the lithium battery grading and capacity testing device further includes a power supply hanging at the rear end of the press bed frame framework. The power supply includes a power supply part and an electronic control part respectively hanging on the left and right sides at the rear end of the press bed frame framework. The power supply part outputs high-voltage direct current of DC700V.

[0009] In the embodiment of the present utility model, the detection module includes a positive probe, a negative probe, a thermal probe, and a DCDC module. The thermal probe is arranged on one side of the negative probe. The positive probe and the negative probe are respectively connected to the DCDC module through braided wires. The DCDC module is arranged above the positive probe and the negative probe.

[0010] In the embodiment of the present utility model, the detection module is installed on the lifting frame by a slide rail.

[0011] Compared with the prior art, the lithium battery grading and capacity testing device of the present utility model has the following beneficial effects:

[0012] 1. It adopts an integrated structure, which is simple in structure and convenient for installation. From the perspective of cost, compared with the split structure, the integrated structure reduces the laying of a large number of cables, effectively reducing costs; from the perspective of installation and commissioning, the equipment with an integrated structure can be installed and commissioned before delivery after production, saving the installation and commissioning time at the customer site; from the perspective of site utilization rate, the integrated structure does not require a wall-penetrating design, saving the time and cost of factory construction. For the same floor area, the integrated structure can place more equipment than the split structure, effectively improving the site utilization rate.

[0013] 2. The DCDC module is installed above the positive and negative probes, and the probes and the DCDC module are integrally installed, reducing the transfer of current terminals, thereby reducing the laying of cables. At the same time, during later maintenance, the probes and the DCDC module can be pulled out together from the equipment maintenance side for repair, which can shorten the maintenance time and has great advantages in quick maintenance.

[0014] 3. The power supply part can directly output high-voltage direct current of DC700V. From the perspective of charge and discharge efficiency, the utilization rate of electric energy using high-voltage DC charge and discharge is higher than that of conventional grading machines. Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the lithium battery grading and capacity testing device according to the embodiment of the present utility model.

[0016] Figure 2 It is a schematic diagram of the sectional structure of the lithium battery grading and capacity testing device according to the embodiment of the present utility model.

[0017] Description of the reference numerals: 1. Press frame; 11. Press frame framework; 111. Foot cup; 12. Front-end fire door; 13. Water cooling system; 3. Power supply; 31. Power supply part; 32. Electric control part; 2. Press; 21. Bottom framework; 211. Main guiding shaft; 22. Lifting framework; 221. Linear bearing; 23. Top framework; 231. Cylinder; 232. Slide rail; 24. Detection module; 241. Positive probe; 242. Negative probe; 243; Thermal probe; 244. DCDC module; 25. Fire alarm; 26. Tray. Detailed implementation manners

[0018] To make the objectives, technical solutions and beneficial effects of the present utility model clearer and more understandable, the following further describes the present utility model in detail with reference to specific embodiments and the attached drawings. Some but not all of the embodiments of the present utility model will be shown in more comprehensive descriptions with reference to the attached drawings later. In fact, various embodiments of the present utility model can be implemented in many different forms and should not be construed as limited to the embodiments described herein; on the contrary, these embodiments are provided to make the present utility model meet the applicable legal requirements.

[0019] In the description of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "center", "longitudinal", "transverse", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and should not be construed as indicating or implying relative importance.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0021] As Figures 1 to 2 shown, an embodiment of the present utility model provides a lithium battery grading and testing device, which includes a hollow press frame 1, a press 2 disposed inside the press frame 1, and a power supply 3 disposed outside the press frame 1.

[0022] The press bed frame 1 is used to provide a corresponding outer cover and various auxiliary cooperation mechanisms for the press bed 2, and it includes a press bed frame framework 11, a fire door 12 provided at the front end of the press bed frame, and a water cooling system 13 provided on both sides inside the press bed frame framework 11. The press bed frame framework 11 of the press bed frame module 1 is installed on the ground by means of bottom feet 111. The fire door 12 is the access channel for the lithium batteries to be tested. At the same time, when a fire breaks out inside the equipment, the fire door 12 can automatically close to prevent the spread of fire. The water cooling system 13 is provided on both sides inside the press bed frame framework 11.

[0023] The power supply module 3 is suspended at the rear end of the press bed frame framework 11 and is used to realize power conversion and charge and discharge the battery. The power supply 3 includes a power supply part 31 and an electronic control part 32 respectively suspended on the left and right sides at the rear end of the press bed frame framework 11. The power supply part 31 mainly places high-voltage part circuit devices, and its output is high-voltage direct current of DC700V for powering the system. The electronic control part 32 mainly places low-voltage control part circuit devices and is responsible for controlling the electronic components in the whole system.

[0024] The press bed 2 is the main execution mechanism for the grading and capacity testing of lithium batteries, and it is fixedly connected to the press bed frame module 1 through fastening screws. The press bed 2 includes a bottom frame 21, a lifting frame 22, a top frame 23, a detection module 24, a fire alarm device 25, and a tray 26. The bottom frame 21 is fixed to the bottom surface inside the press bed frame framework 11 and is fixedly connected to the top frame 23 through a main guide shaft 211. The lifting frame 22 is sleeved on the main guide shaft 211 through a linear bearing 221 and is installed between the bottom frame 21 and the top frame 23. Cylinders 231 for driving the lifting frame 22 and a detection module 24 for detecting lithium batteries are respectively provided on the upper and lower sides of the top frame 23. The tray 26 is fixed to the lifting frame 23. When performing grading and capacity testing, the cylinder 231 drives the lifting frame 22 to move upward, so that the lithium battery in the tray 26 comes into contact with the detection module 24, thereby performing grading and capacity testing.

[0025] The fire alarm device 25 can adopt a smoke sensor device, which is distributed on the top frame 23. When abnormal smoking or a fire occurs during the operation of the storage location, the fire alarm device 25 will trigger corresponding alarm signals according to the situation to give prompts to the customer terminal for personnel to take timely protection or automatic fire protection.

[0026] In this embodiment, the detection module 24 includes a positive probe 241, a negative probe 242, a thermal probe 243, and a DCDC module 244. The detection module 24 is installed on the lifting frame 22 by a slide rail 232. With the slide rail design, the purpose of being pullable is achieved, reducing the need for personnel. Only one person can independently complete the disassembly and installation of the detection module on one side. The structure is simple and convenient for maintenance. The positive probe 241 and the negative probe 242 are respectively connected to the DCDC module 244 through braided wires, and the regulated power supply output by the DCDC module 244 is used for the grading process of the contacted battery. The thermal probe 243 is fixed on the negative probe 242. The DCDC module 244 is installed above the positive probe 241 and the negative probe 242, reducing the transfer of current terminals and thus reducing the laying of cables.

[0027] In this embodiment, the fire alarm devices 25 are distributed on the top frame 23 of the press module 2. When abnormal smoking or fire occurs during the operation of the storage location, the fire alarm devices 25 will trigger corresponding alarm signals according to the situation to the customer terminal to prompt personnel for timely protection or automatic fire fighting.

[0028] The working process of the lithium battery grading test device of the present utility model is as follows:

[0029] When the external stacker transports the tray 26 filled with battery cells into the press and places it inside, the staff can control the cylinder 231 to work through a button, thereby driving the lifting frame 22 and the tray 26 to move upward. When the tray 26 is lifted in place, the positive probe 241, the negative probe 242, and the thermal probe 243 will contact the battery cells in the tray 26, causing the positive and negative electrode posts of the battery to be pressed against the positive and negative probes respectively. The probes can pierce the oxide layer on the surface of the battery tab to achieve a good contact effect; the thermal probe 243 contacts the housing part of the battery to monitor the battery temperature in real time; after the pressing is completed, the voltage is output by the power supply 3 for the grading process. When the battery completes the grading process, the lifting frame 22 descends, driving the tray 26 back to the initial position. At the same time, the device will feedback a signal to the stacking system, and the stacking system will transfer the graded tray 26 to the next process, thus completing the entire grading test process.

[0030] In summary, the lithium battery grading test device of the present utility model has the following beneficial effects:

[0031] 1. Adopting an integrated structure, it has a simple structure and is easy to install. From the perspective of cost, compared with the split structure, the integrated structure reduces the laying of a large number of cables, effectively reducing costs; from the perspective of installation and commissioning, the equipment with an integrated structure can be installed and commissioned after production and then shipped, saving the installation and commissioning time at the customer site; from the perspective of site utilization rate, the integrated structure does not require a wall-penetrating design, saving the time and cost of factory construction. With the same floor area, the integrated structure can place more equipment than the split structure, effectively improving the site utilization rate.

[0032] 2. The DCDC module is installed above the positive and negative probes, and the probes are integrally installed with the DCDC module, reducing the transfer of current terminals, thus reducing the laying of cables. At the same time, during later maintenance, the probes and the DCDC module can be withdrawn together from the equipment maintenance side for repair, which can shorten the maintenance time and has great advantages in terms of rapid maintenance.

[0033] 3. The power supply part can directly input high-voltage direct current of DC700V. From the perspective of charge and discharge efficiency, the utilization rate of electric energy using high-voltage DC charge and discharge is higher than that of conventional grading machines.

[0034] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, 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 capacity testing device, characterized in that: include: A hollow press frame and a press arranged in the press frame, the press frame including a press frame frame, a fire door arranged at the front end of the press frame frame and a water cooling system arranged on both sides of the press frame frame, the press includes a bottom frame, a lifting frame, a top frame, a detection module and a tray, the bottom frame is fixed to the bottom surface of the press frame frame and is fixedly connected to the top frame via a main guide shaft, the lifting frame is sleeved on the main guide shaft via a linear bearing and is installed between the bottom frame and the top frame, the cylinder and the detection module are respectively arranged on the upper and lower sides of the top frame, the tray is fixed on the lifting frame, and when performing a capacity separation test, the cylinder drives the lifting frame to move upward so that the lithium battery in the tray contacts the detection module.

2. The lithium battery capacity testing device according to claim 1, characterized in that: The press frame is installed on the ground in the form of a bottom foot cup.

3. The lithium battery capacity testing device according to claim 1, characterized in that: The press also includes a fire alarm device disposed on the top frame.

4. The lithium battery capacity testing device according to claim 1, characterized in that: It also includes a power supply suspended at the rear end of the press frame, the power supply includes a power supply part and an electric control part respectively suspended at the left and right sides of the rear end of the press frame, and the power supply part outputs DC700V high-voltage direct current.

5. The lithium battery capacity testing device according to claim 1, characterized in that: The detection module includes a positive probe, a negative probe, a thermistor and a DCDC module. The thermistor is arranged on one side of the negative probe. The positive probe and the negative probe are respectively connected to the DCDC module through braided wires. The DCDC module is arranged above the positive probe and the negative probe.

6. The lithium battery capacity testing device according to claim 1, characterized in that: The detection module is installed on the lifting frame by using a slide rail.

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