CN214543672U - Multifunctional miniaturized battery management system - Google Patents
Multifunctional miniaturized battery management system Download PDFInfo
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- CN214543672U CN214543672U CN202120189523.0U CN202120189523U CN214543672U CN 214543672 U CN214543672 U CN 214543672U CN 202120189523 U CN202120189523 U CN 202120189523U CN 214543672 U CN214543672 U CN 214543672U
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Abstract
The utility model discloses a multi-functional miniaturized battery management system, including main control chip, main control chip is connected with voltage detection circuit, current detection circuit, temperature acquisition circuit, warning circuit, voltage detection circuit includes that the model is LTC 6804's lithium ion battery monitor, main control chip's power output end is connected with lithium ion battery monitor's power input end. The method has the advantages of monitoring the working state of the battery in real time, balancing and controlling inconsistency and preventing the battery from being damaged due to the phenomena of overcharge, overdischarge, overheating and the like in the charging and discharging use process of the battery pack.
Description
Technical Field
The utility model relates to a battery management field especially relates to a multi-functional miniaturized battery management system.
Background
In recent years, the requirements of people on environment friendliness and sustainable energy development are gradually increased, and the development of new energy becomes the mainstream of the energy development strategy; in the wave of the development of the new energy automobile industry, the power battery industry also keeps the momentum of continuous and rapid growth, the construction scale of the enterprise capacity is rapidly expanded, the development of the new energy automobile is still in the primary stage at present, although the whole automobile and electric drive control technology is basically mature, the power battery is still a key factor which hinders the development of the automobile industry, and the problems of short battery endurance mileage, short battery cycle life and the like exist; among various electronic products, the lithium ion battery has the advantages of high energy density and the like, so that the application is very wide, and the lithium ion battery gradually moves to the field of new energy automobile power; under the situation that global problems and environmental problems become more severe, vehicles are increasingly using storage batteries as main power sources, and lithium ion batteries are brought into ideal selection.
In order to meet the electric automobile power requirement of a high-voltage and large-capacitance battery, a lithium ion battery is often used in a series-parallel combination manner, but as phenomena of overcharge, overdischarge, overheating and the like frequently occur in the use process of charging and discharging of the battery, a problem of inconsistency exists between more or less batteries, which is also unavoidable, so that the use efficiency of the battery is reduced, and the service life of the battery is shortened; the inconsistency problem is exacerbated with the number of uses, and only relevant measures can be taken to inhibit the aggravation, but the problem cannot be fundamentally eliminated.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a multi-functional miniaturized battery management system has the equilibrium and the control of real-time supervision battery operating condition, inconsistency, prevents that the group battery from damaging the advantage of battery because of phenomenons such as overcharge, overdischarge, overheated in the charge-discharge use.
The technical scheme of the utility model is that:
the utility model provides a multi-functional miniaturized battery management system, includes the main control chip, the main control chip is connected with voltage detection circuit, current detection circuit, temperature acquisition circuit, warning circuit, voltage detection circuit includes that the model is LTC 6804's lithium ion battery monitor, the pin 1 of lithium ion battery monitor is connected with first resistance R26's one end, first electric capacity C32 is connected for CZT 5551's paster triode's pin 2 with the model after first resistance R26's the other end is parallelly connected, first electric capacity C32's other end ground connection, pin 34, the pin 35 of lithium ion battery monitor are connected with second electric capacity C10 and third electric capacity C8 respectively, the other end of pin 30, pin 31, second electric capacity C10 of lithium ion battery monitor and the parallelly connected ground connection of the other end of third electric capacity C8, the pin 36 and the parallelly connected back ground connection of pin 40 of lithium ion battery monitor, the pin 41, the pin 42, the pin 43 and the pin 44 of the lithium ion battery monitor are respectively connected with the second resistor 23, the third resistor R22, the fourth resistor R21 and the fifth resistor R20 in parallel, the other ends of the second resistor 23, the third resistor R22, the fourth resistor R21 and the fifth resistor R20 are connected with VREG in parallel, the pin 45 and the pin 46 of the lithium ion battery monitor are respectively connected with the sixth resistor R25 and the seventh resistor R26, the other end of the sixth resistor R25 is connected with the other end of the seventh resistor R26 in parallel and then grounded, and the power output end of the main control chip is connected with the power input end of the lithium ion battery monitor.
The voltage acquisition circuit of the lithium ion battery pack selects an integrated IC (integrated circuit), namely a lithium ion battery monitor with the type of LTC6804, and the voltage of 12 batteries connected in series can be acquired by a single chip at high precision; the 2.5V reference voltage of the ADC in the chip is provided by a patch triode with the model of CZT5551, communication is carried out in an SPI mode, and a pull-up resistor is added into a circuit for ensuring stable communication with a main control chip.
In a further technical scheme, the current detection circuit is connected with a power output end of the main control chip, the current detection circuit comprises a load sampling circuit, a first voltage differential amplifier, a second voltage differential amplifier, a third voltage differential amplifier and a fourth voltage differential amplifier which are sequentially connected, and the first voltage differential amplifier is connected with the fourth voltage differential amplifier.
A voltage difference amplifier with the type INA117 is selected for voltage acquisition at two ends of the sampling resistor connected in series in a loop, and voltage amplification is achieved.
In a further technical scheme, alarm circuit includes the speaker, pin P of speaker is connected with main control chip's power VCC, pin G of speaker is connected with the pin C of triode, pin B and the eighth resistance R1 and the ninth resistance R2 of triode are parallelly connected, the ninth resistance R2 other end is grounded with the parallelly connected back of pin E of triode.
The abnormal state detection of the lithium ion battery pack mainly comprises the conditions of whether the current, the voltage and the charge state are in a normal range or not, and the like, wherein if the abnormal conditions occur, the buzzer alarms to remind a user; the active buzzer of the alarm circuit is driven by a triode, the current which can be output by the main control chip is very small, the buzzer can not be driven by the output TTL level, a current amplification circuit needs to be established, the collector of the triode is connected with one end of the buzzer, the base is connected to the pin of the main control chip through a resistor, and the emitter is grounded.
The utility model has the advantages that:
the utility model discloses have the equilibrium and the control of real-time supervision battery operating condition, inconsistency, prevent that the group battery from damaging the function of battery because of phenomenon such as overcharge, overdischarge, overheated in the charge-discharge use.
Drawings
Fig. 1 is a schematic structural diagram of a voltage detection circuit of a multifunctional miniaturized battery management system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a current detection circuit of the multifunctional miniaturized battery management system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a main control circuit of the multifunctional miniaturized battery management system according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an alarm circuit of the multifunctional miniaturized battery management system according to the embodiment of the present invention.
Detailed Description
The embodiments of the present invention will be further explained with reference to the drawings.
Example (b):
as shown in fig. 1-4, a multi-functional miniaturized battery management system, including the main control chip, the main control chip is connected with voltage detection circuit, current detection circuit, temperature acquisition circuit, alarm circuit, voltage detection circuit includes that the model is LTC 6804's lithium ion battery monitor, lithium ion battery monitor's pin 1 is connected with first resistance R26's one end, first electric capacity C32 is connected with the pin 2 that the model is C55ZT 51's paster triode after the other end of first resistance R26 connects in parallel, the other end ground connection of first electric capacity C32, pin 34, the pin 35 of lithium ion battery monitor are connected with second electric capacity C10 and third electric capacity C8 respectively, the other end of pin 30, pin 31, second electric capacity C10 of lithium ion battery monitor and the other end parallel ground connection of third electric capacity C8, the pin 36 and the pin 40 of lithium ion battery monitor ground connection after connecting in parallel, the pin 41, the pin 42, the pin 43 and the pin 44 of the lithium ion battery monitor are respectively connected with the second resistor 23, the third resistor R22, the fourth resistor R21 and the fifth resistor R20 in parallel, the other ends of the second resistor 23, the third resistor R22, the fourth resistor R21 and the fifth resistor R20 are connected with VREG in parallel, the pin 45 and the pin 46 of the lithium ion battery monitor are respectively connected with the sixth resistor R25 and the seventh resistor R26, the other end of the sixth resistor R25 is connected with the other end of the seventh resistor R26 in parallel and then grounded, and the power output end of the main control chip is connected with the power input end of the lithium ion battery monitor.
The voltage acquisition circuit of the lithium ion battery pack selects an integrated IC (integrated circuit), namely a lithium ion battery monitor with the type of LTC6804, and the voltage of 12 batteries connected in series can be acquired by a single chip at high precision; the 2.5V reference voltage of the ADC in the chip is provided by a patch triode with the model of CZT5551, communication is carried out in an SPI mode, and a pull-up resistor is added into a circuit in order to ensure stable communication with a main control chip; in this embodiment, the temperature acquisition circuit includes a temperature acquisition chip of type DS18B20 connected to the main control chip; the DS18B20 chip is adopted to obtain the indication temperature of the lithium ion battery pack, and the surface temperature of the battery is accurately obtained through sufficient heat transfer; the temperature is processed and then serially output to a main control board through DQ in 12-bit digital quantity, Rup is a pull-up resistor, voltage pull-up of an I/O port of the main control chip is realized by connecting VCC to the other end of the resistor, the situation that the level of the I/O port is uncertain and loses control over DS18B20 is prevented, and the pull-up resistor Rup can be selected to be 4.7k omega or 10k omega; VCC realizes the energy supply of DS18B20 through a VDD pin, and VCC can select a 3.0-5.5V direct-current voltage source; after the main control chip obtains the temperature from the DS18B20, the SOC value of the lithium ion battery pack is corrected as required according to the temperature, and the temperature is displayed in real time for a user to use.
In another embodiment, as shown in fig. 2, the current detection circuit is connected to the power output terminal of the main control chip, the current detection circuit includes a load sampling circuit, a first voltage differential amplifier, and a second voltage differential amplifier, a third voltage differential amplifier, and a fourth voltage differential amplifier connected in sequence, and the first voltage differential amplifier is connected to the fourth voltage differential amplifier.
A voltage difference amplifier with the type INA117 is selected for voltage acquisition at two ends of the sampling resistor connected in series in a loop, and voltage amplification is achieved.
In another embodiment, as shown in fig. 4, the alarm circuit includes a speaker, a pin P of the speaker is connected to a power VCC of the main control chip, a pin G of the speaker is connected to a pin C of the triode, a pin B of the triode is connected in parallel to the eighth resistor R1 and the ninth resistor R2, and the other end of the ninth resistor R2 is connected in parallel to a pin E of the triode and then grounded.
The abnormal state detection of the lithium ion battery pack mainly comprises the conditions of whether the current, the voltage and the charge state are in a normal range or not, and the like, wherein if the abnormal conditions occur, the buzzer alarms to remind a user; the active buzzer of the alarm circuit is driven by a triode, the current which can be output by the main control chip is very small, the buzzer can not be driven by the output TTL level, a current amplification circuit needs to be established, the collector of the triode is connected with one end of the buzzer, the base is connected to the pin of the main control chip through a resistor, and the emitter is grounded.
The above-mentioned embodiments only express the specific embodiments of the present invention, and the description thereof is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.
Claims (3)
1. The utility model provides a multi-functional miniaturized battery management system, its characterized in that, includes the main control chip, the main control chip is connected with voltage detection circuit, current detection circuit, temperature acquisition circuit, warning circuit, the voltage detection circuit includes that the model is LTC 6804's lithium ion battery monitor, the pin 1 and the one end of first resistance R26 of lithium ion battery monitor are connected, first electric capacity C32 is connected with the pin 2 of the paster triode that the model is CZT5551 after the other end of first resistance R26 connects in parallel, the other end ground connection of first electric capacity C32, pin 34, the pin 35 of lithium ion battery monitor are connected with second electric capacity C10 and third electric capacity C8 respectively, the other end of pin 30, pin 31, second electric capacity C10 and the other end parallel ground connection of third electric capacity C8 of lithium ion battery monitor, the pin 36 and the parallelly connected back ground connection of pin 40 of lithium ion battery monitor, the pin 41, the pin 42, the pin 43 and the pin 44 of the lithium ion battery monitor are respectively connected with the second resistor 23, the third resistor R22, the fourth resistor R21 and the fifth resistor R20 in parallel, the other ends of the second resistor 23, the third resistor R22, the fourth resistor R21 and the fifth resistor R20 are connected with VREG in parallel, the pin 45 and the pin 46 of the lithium ion battery monitor are respectively connected with the sixth resistor R25 and the seventh resistor R26, the other end of the sixth resistor R25 is connected with the other end of the seventh resistor R26 in parallel and then grounded, and the power output end of the main control chip is connected with the power input end of the lithium ion battery monitor.
2. The multifunctional miniaturized battery management system of claim 1 wherein the current detection circuit is connected to the power output of the main control chip, the current detection circuit comprises a load sampling circuit, a first voltage differential amplifier, and a second voltage differential amplifier, a third voltage differential amplifier, and a fourth voltage differential amplifier connected in sequence, the first voltage differential amplifier is connected to the fourth voltage differential amplifier.
3. The multifunctional miniaturized battery management system of claim 1 wherein the alarm circuit comprises a speaker, a pin P of the speaker is connected to a power VCC of the main control chip, a pin G of the speaker is connected to a pin C of the transistor, a pin B of the transistor is connected in parallel to an eighth resistor R1 and a ninth resistor R2, and the other end of the ninth resistor R2 is connected in parallel to a pin E of the transistor and then grounded.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120189523.0U CN214543672U (en) | 2021-01-21 | 2021-01-21 | Multifunctional miniaturized battery management system |
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| CN202120189523.0U CN214543672U (en) | 2021-01-21 | 2021-01-21 | Multifunctional miniaturized battery management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115360800A (en) * | 2022-10-20 | 2022-11-18 | 青岛鼎信通讯股份有限公司 | Battery equalization circuit suitable for electric power product |
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2021
- 2021-01-21 CN CN202120189523.0U patent/CN214543672U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115360800A (en) * | 2022-10-20 | 2022-11-18 | 青岛鼎信通讯股份有限公司 | Battery equalization circuit suitable for electric power product |
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