Bosch Develops Compact Sensor to Monitor Car Battery Performance
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Bosch have developed an electronic battery sensor (EBS) which in the future will help to avoid most of the breakdowns due to run-down batteries. The sensor with integrated evaluation capability measures such elementary battery physical variables as voltage, current and temperature. Aided by complex software algorithms, it computes all factors which accurately describe the condition of the car battery. It even allows for a situation dependent forecast on the future state-of-charge. In modern vehicles, this information is utilised in a targeted way by the car's energy management to always preserve sufficient battery energy for a guaranteed proper engine start even after a longer period of standing still.
When the information is utilised for the management of alternator and engine, it allows for lower fuel consumption and consequently less exhaust emission and also prolongs the battery's service life. Based on its many years of experience in development and production of complex energy management systems in automobiles, Bosch has now brought the development of hardware and sensor integrated software of the electronic battery sensor to the state of readiness for large-scale production. The Bosch EBS will be installed by an OEM in a car for the first time in 2006.
(Click on the photo to enlarge. High resolution versions are available)
The electronic battery sensor from Bosch consists of a chip which comprises all of the electronics and a shunt for current measurement. The two are joined in an assembly unit with the pole terminal and can be directly connected to the car battery by fitting into the pole niche of commercial car batteries. Compared to other available solutions, this presents a great saving in space and costs.
Aside from the hardware, Bosch developed in conjunction with Varta the software for the battery state detection in the electronic battery sensor, the algorithms of which can be completely integrated into the EBS chip. The sensor directly measures the temperature, voltage and current of the battery and on this basis computes capacity and state-of-charge as well as present and future performance capability. The information is transmitted through a LIN interface to the higher-ranking energy management of the vehicle. The information allows for an optimisation of the battery’s state-of charge. The vehicle can be safely started even after a longer period of standing still or when a large number of electrical consumers stressed the battery on the last drive. Battery monitoring is also of the essence in hybrids with start-stop operation.
The battery sensor, however, has even greater application potential: during production, the function can be utilised for component testing or quiescent current testing. And workshops are given a better chance in diagnostic testing if a customer is frequently troubled by a run-down battery.
Research Material:
The Bosch Group is a leading global manufacturer of automotive and industrial technology, consumer goods, and building technology. In fiscal 2004, some 242 000 associates generated sales of 40 billion euros. Set up in Stuttgart in 1886 by Robert Bosch (1861-1942) as "Workshop for Precision Mechanics and Electrical Engineering," the Bosch Group today comprises a manufacturing, sales, and after-sales service network of some 260 subsidiaries and more than 10 000 service centers in over 130 countries.
The special ownership structure of the Bosch Group guarantees its financial independence and entrepreneurial freedom. It makes it possible for the company to undertake significant up-front investments in the safeguarding of its future, as well as to do justice to its social responsibility in a manner reflective of the spirit and will of its founder. 92 % of the shares of Robert Bosch GmbH are held by the charitable foundation Robert Bosch Stiftung. The entrepreneurial ownership functions are carried out by Robert Bosch Industrietreuhand KG.
Additional information can be accessed at www.bosch.com.
- Monitoring the car battery improves cranking ability
- Hardware and software for battery-state detection and forecast ready for production
- Miniature construction for assembly in the pole niche of car battery
Bosch have developed an electronic battery sensor (EBS) which in the future will help to avoid most of the breakdowns due to run-down batteries. The sensor with integrated evaluation capability measures such elementary battery physical variables as voltage, current and temperature. Aided by complex software algorithms, it computes all factors which accurately describe the condition of the car battery. It even allows for a situation dependent forecast on the future state-of-charge. In modern vehicles, this information is utilised in a targeted way by the car's energy management to always preserve sufficient battery energy for a guaranteed proper engine start even after a longer period of standing still.
When the information is utilised for the management of alternator and engine, it allows for lower fuel consumption and consequently less exhaust emission and also prolongs the battery's service life. Based on its many years of experience in development and production of complex energy management systems in automobiles, Bosch has now brought the development of hardware and sensor integrated software of the electronic battery sensor to the state of readiness for large-scale production. The Bosch EBS will be installed by an OEM in a car for the first time in 2006.
(Click on the photo to enlarge. High resolution versions are available)
The electronic battery sensor from Bosch consists of a chip which comprises all of the electronics and a shunt for current measurement. The two are joined in an assembly unit with the pole terminal and can be directly connected to the car battery by fitting into the pole niche of commercial car batteries. Compared to other available solutions, this presents a great saving in space and costs.
Aside from the hardware, Bosch developed in conjunction with Varta the software for the battery state detection in the electronic battery sensor, the algorithms of which can be completely integrated into the EBS chip. The sensor directly measures the temperature, voltage and current of the battery and on this basis computes capacity and state-of-charge as well as present and future performance capability. The information is transmitted through a LIN interface to the higher-ranking energy management of the vehicle. The information allows for an optimisation of the battery’s state-of charge. The vehicle can be safely started even after a longer period of standing still or when a large number of electrical consumers stressed the battery on the last drive. Battery monitoring is also of the essence in hybrids with start-stop operation.
The battery sensor, however, has even greater application potential: during production, the function can be utilised for component testing or quiescent current testing. And workshops are given a better chance in diagnostic testing if a customer is frequently troubled by a run-down battery.
Research Material:
The Bosch Group is a leading global manufacturer of automotive and industrial technology, consumer goods, and building technology. In fiscal 2004, some 242 000 associates generated sales of 40 billion euros. Set up in Stuttgart in 1886 by Robert Bosch (1861-1942) as "Workshop for Precision Mechanics and Electrical Engineering," the Bosch Group today comprises a manufacturing, sales, and after-sales service network of some 260 subsidiaries and more than 10 000 service centers in over 130 countries.
The special ownership structure of the Bosch Group guarantees its financial independence and entrepreneurial freedom. It makes it possible for the company to undertake significant up-front investments in the safeguarding of its future, as well as to do justice to its social responsibility in a manner reflective of the spirit and will of its founder. 92 % of the shares of Robert Bosch GmbH are held by the charitable foundation Robert Bosch Stiftung. The entrepreneurial ownership functions are carried out by Robert Bosch Industrietreuhand KG.
Additional information can be accessed at www.bosch.com.
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