I have always admired Medtronic’s technology. This is a company that helps improve the lives of so many people with their medical research and innovations. First of all, they employ more than 86,000 people, of which, 9,600 are scientists and engineers with a goal to alleviate pain, restore health, and help to extend life with their technology.
Their biggest group is Cardiac and Vascular, but what few people know is that Medtronic designs, manufactures, and ships their own batteries for their devices. They feel that this will improve the safety, reliability, and quality of these batteries in their devices, especially residing within the human body.
Gaurav Jain is the Director of Research and Technology at the Medtronic Energy and Component Center (MECC). He says that the materials Medtronics uses to build implantable rechargeable medical device batteries are similar to those in cell phones. The caveat here is that these batteries will power Medtronic’s devices inside the human body. Remember Samsung phone battery fiasco?
There are 250,000 people walking around who have medical implants that use rechargeable Lithium-Ion batteries. Due to Medtronic’s battery designs and their extensive battery test program, there has never been any confirmed battery failures in any of their devices.
(Image courtesy of Medtronic)
Their medical device, the batteries are designed with a much longer life and added stability, with wider margins for safety than typical commercial batteries. They encase their batteries in laser-welded metal and their electrodes are hermetically sealed with glass.
Medtronic uses many proprietary materials for the primary (non-rechargeable) batteries for life support implantable devices. These are unique and distinct compared to the consumer batteries. Jain comments that “In terms of the total energy or power inside that battery, it is, conservatively speaking, about one-twentieth that of a cell phone.”
Cactus Semiconductor is another great innovator in the medical implant arena. They develop implantable medical ASICs spanning areas from pain management to epilepsy and physical disorders. Their solutions can even aid in the delivery of drugs with implants that maintain a regular schedule which helps eliminate a patient forgetting to take their medication.
(Image courtesy of Cactus Semiconductor)
Cactus Semiconductor has the following power management Integrated Circuit (PMIC) technology:
- Wireless Battery Charger
- Boost Converters
- Buck Converters
- Charge Pumps
- USB Power Management
- WLAN DC-DC Converters
- Power Switches
- Slew Controlled Drivers
- Voltage References
- Voltage and Current Power Sensing
- Power Management Supervisor / Controllers
These PMICs manage the power requirements of your system, while extending battery life, reducing battery size and increasing battery capacity. This leads to reducing the size of the final ASIC and overall device.
Watch for my in-depth article with technical insight and methods on EDN regarding this topic
Image-Guided Surgery, EDN
Medical sensors in biomedical electronics, part 2: the brain, heart, and lung, EDN