X-ray machine for stacked battery AX9000

Stacked cells are new generation batteries having wide-ranging benefits such as increased energy density, reduced internal resistance, and increased discharge ability at high costs. Moreover, they cannot be deformed easily. The invention of these stacked cells has become an anticipated step for further progress in this industry. So the technology of x-ray inspection of batteries is very important in the batteries industry.

 

The process of stack involves attaining flexible size by rolling the cell. This step is not restricted by the winding pin assembly, production way, and high interface uniformity of the pole piece. It will be extensively used in creating automotive-grade power cells in the future.

 

Data reveals new findings by comparing the cells with the traditional winding process. The space utilization rate at the edges of stacked cells becomes more. The energy density can be improved by 5%. The duration of the life cycle as well as the reduced distortion and extension during this cycle is improved by more than 10%. These stacked cells have got increased battery safety, simple structure, and improved structural adaptability.

 

Our instrument is controlled by a programmable logic controller (PLC). It releases X-rays via the X-RAY generator. Next, it passes through the internal structure of the battery. The resultant rays are captured by the imaging system, processed by the related software, and manually estimated. This industrial x ray equipment is used to determine the arrangement of the stacked pieces within the battery and precisely differentiate good products from defective ones. The instrument has a built-in horizontal rotating platform. Hence, it is not essential to fix the battery sideways to prevent the displacement of the pole piece caused due to sideways. It can be placed directly flat and rotated at any angle for inspection. This instrument is quick and convenient to operate while preventing artificial harm to the battery.

 

Advantages：

• This instrument uses a flat inspection table, that helps in varying products without fixture constraints.
• With the help of a micro-focus X-ray tube, the final image remains clearer.
• Easy target setting along with automatic detection.
• Electrical control of Z-axis direction.
• Humanized software interface
• Simple operation
• This system-assisted inspection can minimize production costs, lowers manpower, increase production efficiency, and improve consistent quality.
• The use of software for automatic determination can increase the quality assurance and consistency of the product.
• This equipment comes with convenient process control, SPC software analysis, and quality data analysis.
• Considering all the safety factors, it is designed to ensure the protection of the user.
• The appearance of this equipment is beautiful and generous.
• It has a rotary platform with a C-arm structure design with no fixture. Hence, it is easy for analyzing stacked cells.

 

1. Introduction about the equipment

This semi-automatic x ray battery inspection equipment helps to assess square stacked batteries. It uses the oblique perspective image of the battery edges to check for misalignment of the pole piece. This equipment has automatic positioning to determine the degree of alignment of the cell’s pole piece. It helps in predicting whether the quality of this battery is proper or not.

 

2. Battery information

2.1 Battery form factor

 

    Battery size diagram               

 

 

    2.2 Direction, location, and items of X system inspection are as follows    

Position Name	Design I	Application scope
A cell width	153mm	60-185mm
B core height (without pole lugs)	76mm	60~ 250mm
C Pole lug height	11mm	≤20mm
D Positive pole shoulder width	11.5mm	6-20mm
E Center distance	80mm	60-100mm
F core thickness	4.0mm	4.0-15mm
Number of core layers	25	≤40

 

 

 

 

Inspection direction	Inspection position	Inspection items
Plane direction Battery spin 45°		By illuminating the bottom two corners at 45 degrees, you can see the positive and negative electrode packaging, to detect whether the battery quality is okay or not.

 

2.3 Decision method

A decision is made by comparing the measured value with the standard set interval value. (A decision criterion can be set according to the requirements of the process)

Note: The lower and upper limits of the standard interval are set by customers according to the control ability of their own process.

 

3.Process flow

 

4. Equipment Composition

 

Front View Side View

 

Internal Structure

 

5.Detection ability

1）Measurement precision: ±60μm or less (the real size corresponds to a single pixel).

2) Decision method: Manual decision is the major method, while automatic judgment is auxiliary (automatic judgment algorithm is presented).

 

6.Introduction of functional parts

1) Data statistics: It can determine the distance between anode and cathode of the battery corner, along with output detection data and statistics. Next, it will analyze the minimum and maximum values, average values, etc.

2) Data saving: Save the test data in .csv format. The saved file format is as follows:

 

3) Image saving: You can select to save the judgment image with the original image, data, or both. It is a way for easy inquiry.

 

4) Model switching

• It involves an X-RAY mechanism adjustment, where the common model parameters can be stored in the program.
• Switching time can be ≤ 30 minutes
• Adjustment of the detection point

 

5) The instrument is equipped with an industrial control computer or PLC along with an external system communication function module (Ethernet).

 

7. Safety measures

• This instrument complies with the international safety radiation standards (≤1μSV/hour).
• X-ray instrument will be closed automatically when its maintenance window or door is opened.
• It will be automatically shut down if there is no incoming material for a continuous 10 minutes. This time can anyway be set by a user.
• Set interlock circuit on the maintenance window or door.
• Use the radiation indication sign and use the status indicator to indicate the working status of this X-ray instrument.
• It is possible to measure 1m away from the equipment (operation position)
• The noise of this equipment (Noise) is ≤ 70dB.

 

8. Technical parameters

 

Item		Specific parameters
X-Ray Tube	Brand	American Thermo Fisher
	Type	closed type
	Voltage	90KV(optional 110KV、120KV)
	Current	0.20mA(optional 0.45mA)
	Focusing size	5-15 micron
	Cooling method	Forced air cooling
Image	Imager Types	Flat panel detector (optional: 4″ enhancer)
	Input surface size	114.9mm×64.6mm
	Image size	1248*848
	Resolution	115Lp/cm
	Pixel center distance	74.8µm
Mechanical structure	C-type rotation angle	±15°
	Carriage size	400*350mm
	The rotation angle of the load table	360°
	Weight	≤10kg
Other parameters	Computer	22″LCD monitor/i5CPU/4G memory/500G hard disk
	Dimension	1600mm×1300mm×1900mm
	Weight	about 2000KG
	Power supply	220V-50Hz
	Air source	None
	Power	≤4.8KW
	Temperature and humidity	Temperature：5℃～ 40℃  / Humidity：30 ～ 70RH
	Equipment color	white 7035

 

 

9. Random accessories

The accessory list of this equipment should contain a tool kit, operation manual, maintenance manual, electrical control diagram, spare parts list, software CD, etc.

 

Below mentioned is the list of equipment accessories.

 

No.	Item	Quantity
1	Tool kit	2
2	User’s maintenance manual, electrical control diagram	2
3	Software manual	2
4	X-ray leak detection report	2
5	Equipment factory inspection report	1
6	Certificate of Conformity	1
7	Calibration block	1

 

10. Equipment acceptance

10.1.1: Once the equipment is delivered to Party A, followed by its installation and commission, it will run constantly for 30 days.

10.1.2: In case if the equipment does not reach within 30 days or there is no downtime or failure within 30 days, Party A will begin the acceptance procedure.

10.1.3: The final acceptance criteria are all listed in this agreement.

 

11. Installation, commissioning, and training

11.1 Party A is responsible for the relevant gas, electricity, water, vacuum, and other installation sites.

11.2 Party B is responsible for the installation, commissioning, and system integration of the delivered instrument.

11.3 After the installation of this instrument, a smaller batch trial production will be performed initially. This trial production will be qualified and approved by Party A before it proceeds with the mass production.

11.4 Party B will provide free training for Party A’s appropriate personnel. The training will be on the normal use of equipment, maintenance, defect analysis, troubleshooting, operation safety, emergency handling procedures, etc.

11.5 Party B shall provide an on-site learning plan and training content to Party A. They shall be discretely negotiated by both parties.

 

12. Quality assurance and after-sales service

12.1 The assurance period of this instrument is 12 months from the date of its formal acceptance.

12.2 During this time, Party B is responsible for free maintenance.

12.3 The repair and maintenance of the instrument include everything except wearing parts.

12.4 If the quality of the instrument is improper, Party B shall arrive at the instrument site within 24 hours after receiving Party A’s notice.

12.5 Once when the duration of the warranty period expires, Party B shall still be accountable for providing maintenance and repair services for the equipment. He will be charged only for his reasonable working hours and transportation costs.

12.6 Party B shall only charge the cost of accessories for the purchase and replacement of equipment-related accessories.

 

Annex I: Common brands of accessories

No.	Name	Use brand	Remarks
1	Motion control card	Goodco
2	Servo motor	Panasonic/Omron/Yaskawa
3	Sensor / fiber optic	OMRON/ KEYENCE/SUNX/BANNER
4	Main part bearing	THK、NSK、FSK
5	Linear bearings	THK、HIWIN、IKO
6	Linear guide	THK、HIWIN、PMI、SAMICK
7	Ball screw	HIWIN、THK、TBI
8	Touch screen	Pro-face/OMORN/ Quintessence/Wellen
9	Electric components	Keanshi, Panasonic, Schneider, Siemens
10	Pneumatic components	SMC/CKD
11	AC contactor	Astronergy
12	Industrial control machine	Advantech