Printed circuit woven (PCW) sheet, which is composed of copper circuit printed on the glass cloth substrate. The electrode is formed by screen-printing copper on the GC, which is 0.1 mm in thickness and is resistant to heat up to 300 degrees Celsius. Although the copper printed circuit itself has a slightly rigid feel, the majority area of the PCW sheet keeps a flexible feel and allows hybridization for different devices by taking advantage of the technical features below.
- The electric circuits facing each other on both sides of the GC are connected through the GC basket holes and make ease of 0.1-0.2 (space) mm-thick printed circuit formation. (EICISS: Embedded Integrate Conductor in Skelton Substrate).
- Forming resin insulation on a desired area of the GC substrate before printing copper ink allows the coexistence of different types of circuits such as finely printed circuits, single and double-sided circuits, and circuits having stiffness partially.
- Connecting an FPC made by etching to printed copper allows the coexistence of different types of circuits such as ones that need to have specific electric properties or ones to which electronic devices are soldered.
- Physical and mechanical properties, appearance, and environmental resistance of the PCW sheet can be finally adjusted through resin coating, impregnation, and forming processes.
- The new sensor uses a GC substrate in the clearance instead of a conventional double-sided adhesive PET film substrate.
- The surface protection material of the hybrid device can be selected from non-woven or needle-punched fabrics, which offer an option of sewing them directly on the back side of the seat.
- An extensive choice of surface protection materials according to the seat leather material, enables the hybrid device not only to be used in leather seats but fabric seats for lower-priced and commercial vehicles.
- Less than the 0.15-mm-thick flat heating device is configured with a copper feeder circuit on the platform PCW sheet and a printed high-resistance heating carbon film. The carbon film is formed by printing a high-resistance heating carbon ink on both sides fully overlapping the copper feeder circuit of the platform PCW sheet.
- Because the heating carbon ink is not only printed on the surface but absorbed into the platform PCW sheet through basket holes to join both sides together. The heater has a front-back symmetric structure to meet functional requirements for both flexibility and durability.
- The input voltage of the heater can be selected from 12 V or 24 V, and the maximum temperature limit can be easily adjusted by the gap between electrodes. For a conventional seat heater with a heating cable, placing heating and non-heating areas separately is difficult because the heater needs continuous stroke wiring.
- On the other hand, the hybrid heater device allows an isolated layout of the heating and non-heating areas regardless of the location or shape of the platform PCW, by not applying carbon ink for heating onto the undesirable heating area.
- The sensor is arranged closely with a 3.0 mm gap between the devices to the heating device that generates a temperature of approx. 80 degrees Celsius to keep a temperature up to around 40 degrees Celsius.
Heating during cold weather can typically cause a 30-40% drop in range when the cabin heater is deployed which continues to challenge EVs’ ability to fully replace ICE-powered vehicles (refer to SAE MOBILITY ENGINEERING). As I understand per the article on Advanced HVAC Features in June 2022 Automotive Engineering to date, most efforts to improve EV heating performance have focused on electric seat heaters, some electric steering wheel heaters and for the most part, heat pumps built into the HVAC refrigeration system.
According to the article, Radiant Heating is the technology Automakers are concentrating on with Toyota radiant heating targeted for the 2023 bZ4X; but it covers a very small zone. Design HMI has been working with different Seat Heater Technology Providers last few years like AME and WARMTECH and there are potentially some solutions to reduce power consumption for Driver & Passenger Seat Heating. There is a possibility that some lessons learned may be integrated by OEMs as early as 2025 MY Vehicles.
The role of 3D depth sensors in vehicles is growing in importance, from enabling innovative HMI solutions to improving passive safety. Sensors must meet all requirements for driver monitoring to detect driver distraction and fatigue. This enables the offering of a driver monitoring system with secure 3D facial recognition using only one ToF camera from PMD Technologies.
General Motors’ objective was to achieve a 30% overall reduction in energy that would achieve equal or superior passenger comfort based on 2 occupants per vehicle. Comfort was evaluated by maintaining EHT within ±1 ˚C. Refer to Green Car Congress.
Gentherm developed a proof-of-concept microclimate seat-centric climate control system where the Company designed and integrated a two-zone ClimateSense system into a Chevrolet Bolt EV. The ClimateSense system solution comprises advanced thermal delivery methods, integrated electronics, embedded software, and a novel thermophysiology-based human-centric control algorithm.
Pacific Seat Heaters have the power to deliver Healthy Results by using 1K Carbon Fiber Yarn which maximizes the Infrared Heat delivered to your body. The seat heaters radiate heat directly into your body. Your body absorbs this heat allowing it to penetrate past your skin and into tissue and muscles. As heat permeates different parts of your body, you start to relax, experience improved blood circulation and lower blood pressure. Infrared Heat can help make your drive a lot more pleasant and improve your health
Infrared Seat Heaters will soothe your back and lower discs with the deep penetrating heat but adding a Lumbar Support System to assist in correcting your posture is fundamental. Refer https://pacificrestyling.com/pages/automotive-seat-heaters.
The carbon fiber heating elements produce heat very efficiently while the density of the OE vinyl effectively radiates that heat into your cold seat. The result is that you will start to experience deep penetrating warmth in about 60 seconds.
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