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Battery with autonomous cell balancing

一种蓄电池、平衡的技术，应用在二次电池、二次电池充电/放电、二次电池维修/保养等方向，能够解决蓄电池高负担、不是理想等问题

Active Publication Date: 2016-12-07
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 with 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 Image 6 An example is shown in . exist Image 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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Abstract

A device for cell balancing of battery cells of a battery having a plurality of pairs of battery cells (1) is introduced, wherein each pair of battery cells (1) is connected to a charge equalization unit configured to The cell voltages of the battery cells (1) of the pair of battery cells (1) are mutually balanced. The device also has a measuring device (12) configured to output a current proportional to the smallest cell pair voltage to a plurality of series-connected resistors (13). According to the invention, a comparator (24) is provided, which is connected on the input side to the pole of the first battery cell (1) of the associated pair of battery cells (1) and to the corresponding resistor (13), and is connected to the The output side is connected to the control electrode of the corresponding discharge cell (25) and is designed to output a control signal as a function of the voltage difference. Wherein, the discharge unit (25) is configured to allow a discharge current to flow out of the corresponding pair of battery cells (1) according to 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 Patents(China)
IPC IPC(8): H01M10/44H01M10/42
CPCH01M10/425H01M10/441Y02E60/10
Inventor S·布茨曼
Owner ROBERT BOSCH GMBH