Detection circuit for detecting battery voltage in battery pack, and battery pack
A technology for detecting circuit and battery voltage, applied in the direction of measuring current/voltage, circuit, secondary battery, etc., can solve the problem of high cost
Inactive Publication Date: 2016-04-20
BOSCH AUTOMOTIVE PROD SUZHOU
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Problems solved by technology
relatively high cost
Method used
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[0017] Illustrative examples of the invention will now be described with reference to the drawings, wherein like reference numerals refer to like elements. The embodiments described below are intended to help those skilled in the art to fully understand the present invention, and are intended to be illustrative rather than limiting. The illustrations of the components, components, modules, devices and equipment bodies in the figures are not necessarily drawn to scale, but only schematically show the relative relationship between these components, components, modules, devices and equipment bodies.
[0018] figure 1 is a schematic circuit diagram, wherein the detection circuit 20 is electrically connected to the detected battery sub-group 10 . Such as figure 1 As shown, the detection circuit 20 is connected between the positive pole and the negative pole of the battery sub-pack 10 to obtain the voltage across the battery sub-pack 10 . The battery sub-pack 10 may only include ...
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The invention provides a detection circuit for detecting battery voltage in a battery pack. The detection circuit comprises a voltage controlled current source which is in bridge connection with the positive pole and the negative pole of a sub battery pack in the battery pack; an output end of the voltage controlled current source is grounded through an output resistor; each battery pack includes one single battery or more than one single battery; the voltage controlled current source includes an operational amplifier and a switch device, wherein a positive phase input end of the operational amplifier is electrically connected with the positive pole of the sub battery pack through a first resistor, and is electrically connected with the negative pole of the sub battery pack through a second resistor; a negative phase input end is electrically connected with the positive pole of the sub battery pack through a third resistor; a control end of the switch device is electrically connected with the output end of the operational amplifier; and a first end of the switch device is electrically connected with the negative phase input end of the operational amplifier, and a second end of the switch device is grounded through the output resistor, so that the voltage at two ends of the output resistor represents the voltage of the sub battery pack. The detection circuit for detecting battery voltage in a battery pack can provide high measuring accuracy.
Description
technical field [0001] The present invention relates to battery packs, and more particularly to techniques for detecting the voltage of cells in the battery pack. Background technique [0002] In the case of high voltage requirements of electrical equipment, it is necessary to connect multiple single cells in series to form a battery pack to obtain high voltage. During the discharge and charge process of the battery pack, due to the differences in capacity and internal resistance of each single battery, during the charge and discharge process, the single battery capacity, internal resistance, voltage, state of charge (SOC) ) and other changes, resulting in problems such as overcharging and over-discharging of individual cells. If this situation is not intervened, it will lead to overall performance degradation and even premature failure of the battery pack. Therefore, the voltage of the single battery needs to be monitored. [0003] For the monitoring of the voltage of th...
Claims
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Login to View More IPC IPC(8): G01R19/00H01M10/48
CPCY02E60/10
Inventor 庞棋峰
Owner BOSCH AUTOMOTIVE PROD SUZHOU