Arrangement for measuring a single cell in a rechargeable battery pack and rechargeable battery pack comprising such an arrangement
A technology for measuring devices and battery packs, applied in measuring devices, secondary battery charging/discharging, measuring electricity, etc., can solve problems such as high charging cycle times and high battery loss
Active Publication Date: 2013-01-30
麦太保有限公司
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- Application Information
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Problems solved by technology
This in turn leads to a higher number of charging cycles and thus to a higher wear and tear on the individual cells of the battery pack
Method used
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[0019] The known electric device 11 shown in FIG. 3 has a series circuit 13 composed of a plurality of batteries as a power source. In the example shown, ten batteries 14 connected in series are provided. However, the number of batteries 14 can be changed when needed. The outer first battery 14a shown at the bottom in FIG. 3 is connected to the ground 17 of the electric device 11 with its negative electrode. The outer second battery 14b of the series current 13 is connected to the power supply line 18 of the electric device 11 with its positive electrode. The batteries 14, 14a, and 14b are connected to each other through a connecting branch 20, and a connecting branch 20 respectively connects the positive electrode of one battery 14, 14a with the negative electrode of the adjacent battery 14, 14b. In the example shown, the battery is a lithium ion battery, and the nominal voltage of the lithium ion battery is 4.1V, so that the entire series circuit 13 has a nominal voltage of...
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The invention relates to an arrangement (41) for measuring a cell in a rechargeable battery pack (43), wherein the rechargeable battery pack (43) comprises a series connection (13) composed of a plurality of cells (14, 14a, 14b), wherein two adjacent cells (14, 14a, 14b) are electrically interconnected by means of a connecting branch (20), and wherein the arrangement (41) has a measuring device (27) and comprises a switching device (19), which is equipped to selectively connect exactly one connecting branch (20) to a measuring input (22) of the measuring device (27).; In order to provide an arrangement for measuring a single cell, in which the debalancing of the charge state of the individual cells (14, 14a, 14b) is at least substantially prevented due to the measurements by means of the measuring device, the arrangement (41) comprises at least one load (37) arranged between two connecting branches (20), the load (37) can selectively be brought into an activated operating state or into a deactivated operating state by means of a control signal (s) such that an electric charge can be withdrawn from at least one cell (14, 14a, 14b) during the activated operating state by means of the load (37).
Description
Technical field [0001] The present invention relates to a device for measuring a single cell in a battery pack. The battery pack includes a series circuit composed of a plurality of batteries. Two adjacent batteries are electrically connected to each other through a connecting branch. The device has a measurement The device also includes a switching device, which is configured to selectively connect exactly one connecting branch to the measurement input of the measurement device. The present invention also relates to a battery pack having the device. Background technique [0002] A device for single cell measurement having a switching device and a measuring device is known. In this device, the measuring device is used to measure the potential of the negative electrode of the series circuit with respect to the battery. During the measurement cycle, the switch device connects the positive pole of each battery of the battery pack to the measurement input of the measurement device ...
Claims
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IPC IPC(8): G01R31/36H01M10/44H01M10/48
CPCY02E60/12H01M10/482G01R31/3658G01R31/3606H01M10/441G01R19/16542G01R31/396Y02E60/10G01R31/382
Inventor 贝恩德·维斯纳托比亚斯·贝克
Owner 麦太保有限公司