CN210867181U - Multi-string distributed lithium battery protection board - Google Patents
Multi-string distributed lithium battery protection board Download PDFInfo
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- CN210867181U CN210867181U CN201922159637.6U CN201922159637U CN210867181U CN 210867181 U CN210867181 U CN 210867181U CN 201922159637 U CN201922159637 U CN 201922159637U CN 210867181 U CN210867181 U CN 210867181U
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Abstract
The utility model discloses a many clusters distributing type lithium battery protection shield, the utility model provides a many clusters distributing type lithium battery protection shield, including power supply circuit, buffer circuit, RS485 communication circuit, host computer BMS, from BMS, principal and subordinate communication circuit, principal and subordinate identification circuit, relay control circuit, sampling circuit and warning circuit, power supply circuit respectively with host computer BMS, principal and subordinate communication circuit, from the BMS with the buffer circuit electricity is connected, the buffer circuit is connected with RS485 communication circuit electricity, host computer BMS with principal and subordinate communication circuit electricity is connected, through only sending signal for initiative BMS from the BMS, and host computer BMS only accepts from the electromechanical protection request, when the battery is unusual, from BMS sending signal makes the host computer cut off charge-discharge circuit. The utility model provides a many strings of distributed lithium battery protection boards have the effect of effective control circuit and charge-discharge protection.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a many strings of distributing type lithium battery protection boards.
Background
In order to adapt to the application scene of the kart, two 60AH lithium battery packs are designed to be symmetrically used, so that the system balance is facilitated. These two BMS for protecting the lithium battery need to overcome the problem that the existing BMSs on the market cannot communicate with each other.
SUMMERY OF THE UTILITY MODEL
To above-mentioned problem, provide a many cluster distributing type lithium cell protection boards now, aim at realizing that two BMS protection boards divide the labour in coordination, effectively protect the overcharge overdischarge and various states interaction of lithium cell.
The specific technical scheme is as follows:
a multi-string distributed lithium battery protection plate comprises a power supply circuit, an isolation circuit, an RS485 communication circuit, a host BMS, a slave BMS, a master-slave communication circuit, a master-slave identification circuit, a relay control circuit, a sampling circuit and an alarm circuit, wherein the power supply circuit is electrically connected with the host BMS, the master-slave communication circuit, the slave BMS and the isolation circuit respectively, the isolation circuit is electrically connected with the RS485 communication circuit, the host BMS is electrically connected with the master-slave communication circuit, the master-slave communication circuit is electrically connected with the slave BMS, the host BMS is electrically connected with the RS485 communication circuit, the master-slave identification circuit and the sampling circuit respectively, the host BMS is electrically connected with the relay control circuit, and the slave BMS is electrically connected with the alarm circuit.
The multi-string distributed lithium battery protection board further has the characteristic that the master-slave communication circuit comprises a resistor R39, a resistor R40, a field-effect transistor Q1, an electromagnetic relay K1, a diode D10, a capacitor C36, a resistor R38, a diode D9, a resistor R36, a capacitor C37, a photocoupler U8, a resistor R37 and a capacitor C38, the output terminal DOUT1 of the slave BMS is electrically connected with one end of the resistor R39, the resistor R40 is further electrically connected between the other end of the resistor R39 and the ground, the other end of the resistor R39 is further electrically connected with the gate of the field-effect transistor Q1, the source of the field-effect transistor Q1 is grounded, the drain of the field-effect transistor Q1 is electrically connected with the anode of the diode D10 and one end of the coil of the electromagnetic relay K1 respectively, the other end of the coil of the electromagnetic relay K1 and the cathode of the diode D10 are electrically connected with the first output terminal of the power supply circuit, the capacitor C36 and the resistor R38 are sequentially connected in series between a common contact of the electromagnetic relay K1 and a normally open contact of the electromagnetic relay K1, a normally closed contact of the electromagnetic relay K1 is arranged in a suspended manner, an anode of the diode D9 is electrically connected with a second output end of the power supply circuit, a cathode of the diode D9 is electrically connected with one end of the resistor R36, the other end of the resistor R36 is electrically connected with a common contact of the electromagnetic relay K1, a normally open contact of the electromagnetic relay K1 is also electrically connected with an anode of the photocoupler U8, the capacitor C37 is further electrically connected between the anode of the photocoupler U8 and the ground, a cathode and an emitter of the photocoupler U8 are both grounded, a collector of the photocoupler U8 is respectively electrically connected with one end of the resistor R37 and one end of the capacitor C38, and the other end of the resistor R37 is electrically connected with a second output end of the power supply circuit, the other end of the capacitor C38 is grounded, and the collector of the photoelectric coupler is electrically connected to the input DIN1 of the host BMS.
The beneficial effect of above-mentioned scheme is: when the output end DOUT1 of the slave outputs high level, the field effect transistor Q1 is turned on, so that the coil of the electromagnetic relay K1 is energized, and further the photoelectric coupler U8 is turned on, and therefore the input end DIN1 of the master BMS is changed from high level input to low level input, and further the master BMS receives a signal sent by the slave BMS.
The multi-string distributed lithium battery protection board further has the characteristics that the power circuit comprises a voltage stabilizing output circuit, a voltage reducing output circuit and a conversion output circuit, the output end of the voltage stabilizing output circuit is respectively electrically connected with the power input end of the voltage reducing output circuit and the power input end of the conversion output circuit, the input end of the voltage stabilizing output circuit is connected with the voltage of a lithium battery to be tested, the output end of the voltage reducing output circuit is used as the second output end of the voltage stabilizing output circuit and is respectively electrically connected with the other end of the resistor R37 and the anode of the diode D9, and the output end of the conversion output circuit is used as the first output end of the voltage stabilizing output circuit and the cathode of the diode D10 are electrically connected
The beneficial effect of above-mentioned scheme is: the voltage converter is used for converting the voltage input by the multiple strings of lithium batteries into the voltage required by the circuits in the protection board.
In conclusion, the scheme has the beneficial effects that:
the utility model provides an among the many cluster distributed lithium battery protection boards, through only sending signal for initiative BMS from the BMS, and host computer BMS only accepts from the machine protection request, when being unusual from the side battery of machine, makes the host computer cut off the charge-discharge circuit from BMS sending signal. The utility model provides a many strings of distributed lithium battery protection boards have the effect of effective control circuit and charge-discharge protection.
Drawings
Fig. 1 is a block diagram of a circuit structure of a multi-string distributed lithium battery protection board according to the present invention;
fig. 2 is the structure schematic diagram of the master-slave communication circuit of the multi-string distributed lithium battery protection board of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be further described with reference to the following specific examples, which should not be construed as limiting the invention.
Fig. 1 is the utility model discloses a circuit structure block diagram of many strings of distributed lithium battery protection boards, fig. 2 is the utility model discloses a many strings of distributed lithium battery protection boards's principal and subordinate communication circuit schematic diagram, as shown in fig. 1, fig. 2, the many strings of distributed lithium battery protection boards that this embodiment provided: the intelligent monitoring system comprises a power supply circuit, an isolation circuit, an RS485 communication circuit, a master BMS, a slave BMS, a master-slave communication circuit, a master-slave identification circuit, a relay control circuit, a sampling circuit and an alarm circuit, wherein the power supply circuit is respectively electrically connected with the master BMS, the master-slave communication circuit, the slave BMS and the isolation circuit, the isolation circuit is electrically connected with the RS485 communication circuit, the master BMS is electrically connected with the master-slave communication circuit, the master-slave communication circuit is electrically connected with the slave BMS, the master BMS is respectively electrically connected with the RS485 communication circuit, the master-slave identification circuit and the sampling circuit, the master BMS is electrically connected with the relay control.
It should be noted that the isolation circuit adopts a digital isolator with the model number of ADUM1201ARZ, and is used for converting the 5V voltage obtained by the conversion of the power supply circuit into an isolated 5V voltage to supply power to the RS485 communication circuit.
It should be noted that the master-slave identification circuit adopts a chip with the model number of PIC18F46K80-I/PT for identifying whether the lithium battery information comes from the master BMS or the slave BMS, the master BMS controls the on-off of the whole charging and discharging loop in the processing, and the slave BMS provides signals for alarming.
It should be further noted that the relay control circuit is used for receiving a signal of the host BMS to control on/off of the whole charge and discharge circuit.
It should be further noted that the sampling circuit adopts a chip with model number BQ7694003DBT to sample and output the voltage and the current of the multiple strings of lithium batteries.
It should be further noted that the alarm circuit is used for sending alarm information when the lithium battery on the slave side is abnormal.
In the above embodiment, the master-slave communication circuit includes a resistor R39, a resistor R40, a fet Q1, an electromagnetic relay K1, a diode D10, a capacitor C36, a resistor R38, a diode D9, a resistor R36, a capacitor C37, a photocoupler U8, a resistor R37, and a capacitor C38, an output terminal DOUT 38 of the slave BMS is electrically connected to one end of the resistor R38, a resistor R38 is further electrically connected between the other end of the resistor R38 and ground, the other end of the resistor R38 is further electrically connected to a gate of the fet Q38, a source of the fet Q38 is grounded, a drain of the fet Q38 is electrically connected to an anode of the diode D38 and one end of a coil of the electromagnetic relay K38, the other end of the coil of the electromagnetic relay K38 and a cathode of the diode D38 are both electrically connected to a first output terminal of the power supply circuit, a capacitor C38 and a resistor C38 are sequentially connected in series between a common contact of the electromagnetic relay K38 and a, the normally closed contact of the electromagnetic relay K1 is arranged in a suspended mode, the positive electrode of the diode D9 is electrically connected with the second output end of the power circuit, the negative electrode of the diode D9 is electrically connected with one end of the resistor R36, the other end of the resistor R36 is electrically connected with the common contact of the electromagnetic relay K1, the normally open contact of the electromagnetic relay K1 is also electrically connected with the anode of the photoelectric coupler U8, a capacitor C37 is further electrically connected between the anode of the photoelectric coupler U8 and the ground, the cathode and the emitter of the photoelectric coupler U8 are both grounded, the collector of the photoelectric coupler U8 is respectively electrically connected with one end of the resistor R37 and one end of the capacitor C38, the other end of the resistor R37 is electrically connected with the second output end of the power circuit, the other end of the capacitor C38 is grounded, and the collector of the photoelectric coupler is also electrically.
In the above embodiment, the power supply circuit includes a voltage stabilizing output circuit, a voltage reducing output circuit and a converting output circuit, an output end of the voltage stabilizing output circuit is electrically connected to a power input end of the voltage reducing output circuit and a power input end of the converting output circuit, respectively, an input end of the voltage stabilizing output circuit is connected to a voltage of the lithium battery to be tested, an output end of the voltage reducing output circuit is used as a second output end and is electrically connected to the other end of the resistor R37 and a positive electrode of the diode D9, and an output end of the converting output circuit is used as a first output end and is electrically connected to a negative electrode of the diode.
The working principle is as follows: when the lithium battery on the slave side is abnormal, the output end DOUT1 of the slave BMS outputs high level, the field effect transistor Q1 is conducted, so that the coil of the electromagnetic relay K1 is electrified to enable the normally open contact of the electromagnetic relay to be closed, the resistor R38 is in a short-circuit state, the input end DIN1 of the control circuit after the photoelectric coupler U8 is conducted is changed from high level input to low level input, and the master BMS sends out a control signal to the relay control circuit after receiving the signal, so that the lithium battery of the relay control circuit cuts off a charging and discharging loop to protect the lithium battery.
The above is only a preferred embodiment of the present invention, and not intended to limit the scope and the embodiments of the present invention, and it should be appreciated by those skilled in the art that all equivalent substitutions and obvious changes made by the present invention shall be included in the scope of the present invention.
Claims (3)
1. The utility model provides a many strings of distributed lithium cell protection shields which characterized in that: the intelligent monitoring system comprises a power supply circuit, an isolation circuit, an RS485 communication circuit, a host BMS, a slave BMS, a master-slave communication circuit, a master-slave identification circuit, a relay control circuit, a sampling circuit and an alarm circuit, wherein the power supply circuit is respectively electrically connected with the host BMS, the master-slave communication circuit, the slave BMS and the isolation circuit, the isolation circuit is electrically connected with the RS485 communication circuit, the host BMS is electrically connected with the master-slave communication circuit, the master-slave communication circuit is electrically connected with the slave BMS, the host BMS is respectively electrically connected with the RS485 communication circuit, the master-slave identification circuit and the sampling circuit, the host BMS is electrically connected with the relay control circuit, and the slave BMS is electrically connected with the.
2. The multi-string distributed lithium battery protection plate as claimed in claim 1, wherein: the master-slave communication circuit comprises a resistor R39, a resistor R40, a field effect transistor Q1, an electromagnetic relay K1, a diode D10, a capacitor C36, a resistor R38, a diode D9, a resistor R36, a capacitor C37, a photocoupler U8, a resistor R37 and a capacitor C38, wherein an output end DOUT 38 of the slave BMS is electrically connected with one end of the resistor R38, the other end of the resistor R38 is electrically connected with the ground, the other end of the resistor R38 is electrically connected with a grid electrode of the field effect transistor Q38, a source electrode of the field effect transistor Q38 is grounded, a drain electrode of the field effect transistor Q38 is electrically connected with an anode of the diode D38 and one end of a coil of the electromagnetic relay K38 respectively, the other end of the coil of the electromagnetic relay K38 and a cathode of the diode D38 are electrically connected with a first output end of the power supply circuit, and a normally open contact of the resistor R38 and the capacitor C38 are connected in series between a common contact of the electromagnetic relay K38, the normally closed contact of the electromagnetic relay K1 is arranged in a suspension manner, the anode of the diode D9 is electrically connected with the second output end of the power circuit, the cathode of the diode D9 is electrically connected with one end of the resistor R36, the other end of the resistor R36 is electrically connected with the common contact of the electromagnetic relay K1, the normally open contact of the electromagnetic relay K1 is also electrically connected with the anode of the photocoupler U8, the capacitor C37 is electrically connected between the anode of the photocoupler U8 and the ground, the cathode and the emitter of the photocoupler U8 are both grounded, the collector of the photocoupler U8 is electrically connected with one end of the resistor R37 and one end of the capacitor C38 respectively, the other end of the resistor R37 is electrically connected with the second output end of the power supply circuit, the other end of the capacitor C38 is grounded, the collector of the photocoupler is also electrically connected to the input DIN1 of the host BMS.
3. The multi-string distributed lithium battery protection plate as claimed in claim 2, wherein: the power supply circuit comprises a voltage stabilizing output circuit, a voltage reducing output circuit and a conversion output circuit, wherein the output end of the voltage stabilizing output circuit is respectively electrically connected with the power input end of the voltage reducing output circuit and the power input end of the conversion output circuit, the input end of the voltage stabilizing output circuit is connected with the voltage of the lithium battery to be tested, the output end of the voltage reducing output circuit is used as the second output end is respectively electrically connected with the other end of the resistor R37 and the anode of the diode D9, and the output end of the conversion output circuit is used as the first output end and the cathode of the diode D10 are electrically connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922159637.6U CN210867181U (en) | 2019-12-05 | 2019-12-05 | Multi-string distributed lithium battery protection board |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922159637.6U CN210867181U (en) | 2019-12-05 | 2019-12-05 | Multi-string distributed lithium battery protection board |
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| CN210867181U true CN210867181U (en) | 2020-06-26 |
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| CN201922159637.6U Active CN210867181U (en) | 2019-12-05 | 2019-12-05 | Multi-string distributed lithium battery protection board |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234671A (en) * | 2020-09-30 | 2021-01-15 | 重庆辉腾能源股份有限公司 | Cascade battery protection circuit |
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2019
- 2019-12-05 CN CN201922159637.6U patent/CN210867181U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112234671A (en) * | 2020-09-30 | 2021-01-15 | 重庆辉腾能源股份有限公司 | Cascade battery protection circuit |
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