Power supply circuit for voltage acquisition of arbitrary battery
A battery voltage, power supply circuit technology, applied in circuit devices, DC circuits above three wires, DC network circuit devices, etc., can solve the problems of low efficiency, waste of wire accessories and labor, and repeated external wiring, etc., to achieve low cost, avoid The effect of repeated wiring
Pending Publication Date: 2021-05-04
FUZHOU FUGUANG ELECTRONICS
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Problems solved by technology
For example, there are 15 battery cells in total, then chip 1 is connected to the 1st to 12th cell, and chip 2 is connected to the 4th to 15th cell. This method is widely used in BMS battery collection; the problem it brings is the external wiring Repetition is required, wires, accessories and labor are wasted, and the benefit is low
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[0020]The embodiment of the present invention is provided by providing a power supply circuit collected by any stencil voltage, and there is a technical problem that the prior art in the prior art is required, requiring waste of wire, accessories and labor, low-efficiency, and realizes the avoidance of a cumbersome repeating wiring. The technology effect of design goals only with small costs.
[0021]The technical solution in the embodiment of the present invention is to solve the above problems, and the overall idea is as follows:
[0022]The device power supply design requires that the input voltage of V + \ V- must be higher than 11V, and the power supply voltage is higher than the access battery string voltage. Since the single lithium battery is limited to 4.2V, 3 string battery maximum voltage is 12.6V, in order to ensure that the input voltage is higher than 11V, a 15V supply voltage is designed on a specific number of battery strings, several specific numbers of battery strings Th...
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The invention provides a power supply circuit for voltage acquisition of anarbitrary battery. The power supply circuit comprises an LTC-68xx series chip, diode modules, an isolation power supply module and an external power supply, wherein the external power supply is connected to an input end of the isolation power supply module, a negative output end of the isolation power supply module is connected to the diode modules, and a positive output end of the isolation power supply module is connected to a pin V+ of the LTC-68xx series chip; a pin V- of the LTC-68xx series chip is connected to a pin BAT0; and the diode modules are respectively connected to the LTC-68xx series chips. Therefore, the output end voltage of the isolation power supply module is greater than an input battery string voltage and is less than or equal to 70 V; and tedious repeated wiring is avoided, and the design goal is achieved at very low cost.
Description
[Technical field][0001]The present invention relates to a power supply circuit for any stencil voltage collected.【Background technique】[0002]Linear Technology Corporation Developed LTC68XX (e.g., 6804, 6811) series detection chip is currently widely used in lithium battery testing, which has a 12-string battery simultaneously, which supports a few hundred string batteries, and Measuring speed fast measurement error small characteristics. Single chips can be measured within 290s, and the maximum error is 1.2mV.[0003]LTC-68XX (such as 6811) series of chips must be greater than 11V, and should not be less than the total input battery string voltage, the maximum no more than 70V, otherwise the chip overvoltage fault is caused. General case the chip power supply takes from the positive electrode of the collected battery pack. If the number of collected numbers are determined (for fixed acquisition occasions), the chip power supply is easy to determine, but when the number of batteries co...
Claims
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IPC IPC(8): H02J1/08
CPCH02J1/082
Inventor 陈首霞丁利剑
Owner FUZHOU FUGUANG ELECTRONICS