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Balancing electrical voltages of electrical accumulator units

A memory cell and electric memory technology, applied in the direction of charge equalization circuit, current collector, electrical components, etc., can solve the problems of memory cell damage, different voltage, etc.

Inactive Publication Date: 2012-07-25
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Especially during the service life of the memory cells, without corresponding countermeasures, this can lead to different voltages of the individual memory cells from each other
Especially in the case of lithium-ion batteries, overcharging or deep discharging of individual memory cells can lead to irreversible damage

Method used

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  • Balancing electrical voltages of electrical accumulator units
  • Balancing electrical voltages of electrical accumulator units
  • Balancing electrical voltages of electrical accumulator units

Examples

Experimental program
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Embodiment Construction

[0022] figure 1 Partially shown is an electrical storage device 201 with a plurality of memory cells 202 connected in series. Each memory unit 202 is implemented as a storage unit 203 . The electrical storage unit 201 is designed as a battery 204 , whereby the storage unit 203 is designed as a battery unit 205 . The first memory cell 206 is connected via a cathode 206' to a line 207 which leads to a node 208 which is connected to a further node 210 by means of a line 209. Node 210 is connected to a memory cell 212 by means of a line 211 . The second memory cell 212 has a positive pole 212' and a negative pole 212". The positive pole 212' is connected to a line 211. The negative pole 212" is connected to a line 215 via a line 213 via a node 214, which leads to a further node 216. From node 216 another wire 217 extends to a third memory cell 218 . The memory cell 218 has, on its part, a positive pole 218' and a negative pole 218", wherein the positive pole 218' is connected ...

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PUM

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Abstract

The invention relates to a method for balancing the electrical voltages of at least two electrical accumulator units (202, 206, 212, 218) that are connected in series. According to the invention, a coil (231, 259) is charged by means of one accumulator unit (202, 212) and the other accumulator unit (202, 206, 218) is charged with the energy of said charged coil (231, 259). Optionally, only the other accumulator unit (202, 206, 218) is charged. In addition, the invention relates to a corresponding electrical accumulator (201).

Description

technical field [0001] The invention relates to a method for equalizing the voltage of at least two electrical memory cells connected in series. Furthermore, the invention relates to a corresponding electrical storage device. Background technique [0002] It can be seen that new battery systems will be used more and more in the future not only in stationary applications, such as in wind power installations, but also in non-stationary applications, such as in motor vehicles, for example in hybrid and electric vehicles, Very high demands are placed on these battery systems in terms of reliability. The background to these high demands is that the failure of the battery system can lead to failure of the entire system relevant to the application or lead to safety-related problems. As an example of a failure, imagine an electric vehicle which, when its traction battery fails, so-called "breaks down" because it can no longer move forward. As a safety-related problem, a wind powe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00H02J7/02
CPCH02J7/0014Y02T10/7055Y02T10/70
Inventor S·布茨曼
Owner ROBERT BOSCH GMBH