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Battery with autonomous cell balancing

A storage battery and balancing technology, which is applied in the direction of secondary battery, secondary battery charging/discharging, secondary battery repair/maintenance, etc. It can solve the problems of high battery burden and not ideal

Active Publication Date: 2013-12-04
ROBERT BOSCH GMBH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, limiting to powers of two is not ideal
Furthermore, an increasing number of accumulator cells connected in parallel will be arranged in the charge equalization unit, which means that the wiring of the voltage divider will place an undesirably high load on the accumulator

Method used

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  • Battery with autonomous cell balancing
  • Battery with autonomous cell balancing
  • Battery with autonomous cell balancing

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0030] image 3 A first embodiment of a measuring device for use within the scope of the invention is shown. image 3 and Figure 4 Used to explain the mode of operation of the measuring device for use within the scope of the present invention. Figure 5 A possible embodiment of the measuring device for applications with multiple pairs of battery cells is shown. exist Figure 3 to Figure 5 , terminal points A, B, C and D indicate where additional circuit elements are connected according to the invention, for which circuit elements are in Figure 6 An example is shown in . exist Figure 6 The connection terminals associated with terminal terminals A, B, C and D, respectively, are described by using the same notation in .

[0031] First electrodes of a battery cell 1 of a pair of battery cells 1 connected in series with other pairs of battery cells to one group are connected to two input terminals of a transmission impedance amplifier 12 . The second input of the transfer...

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PUM

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Abstract

The invention relates to a device for balancing the battery cells (1) of a battery comprising a plurality of pairs of battery cells (1). Each pair of battery cells (1) is connected to a charge balancing unit which is designed to balance the cell voltages of the battery cells (1) of the pair of battery cells (1) with respect to each other. The device further has a measuring device (12) which is designed to output a current that is proportional to a minimal cell pair voltage to a plurality of resistors (13) that are connected in series. According to the invention, comparators (24) are provided, each of which is connected to a pole of the first battery cell (1) of an assigned pair of battery cells (1) and to a respective resistor (13) on the input side and to a control electrode of a respective discharging unit (25) on the output side. The comparators are designed to output a control signal that is dependent on a voltage difference. The discharging units (25) are designed to allow a discharge current to flow from the respective pair of battery cells (1) dependent on the control signal.

Description

technical field [0001] The invention relates to a device for balancing (charging equalization) battery cells of an accumulator battery having a plurality of battery cells connected in series, wherein control by a microcontroller is not necessary according to the invention, ie the device can operate autonomously run. Background technique [0002] In the future, battery systems will increasingly be used both in stationary applications and in vehicles such as hybrid and electric vehicles. In order to be able to meet the requirements for power and the adjustable power available for the respective application, a plurality of battery cells are connected in series. Because of the series circuit, the failure of one battery cell leads to failure of the battery and this in turn leads to failure of the entire system, so that particularly safety-related applications place high demands on the reliability of the battery. In order to determine the state of the individual batteries and ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44H01M10/42
CPCY02E60/12H02J7/0063H01M10/425H01M10/441Y02E60/10
Inventor S·布茨曼
Owner ROBERT BOSCH GMBH