CN219498974U - Multi-battery pack hot plug management circuit - Google Patents
Multi-battery pack hot plug management circuit Download PDFInfo
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- CN219498974U CN219498974U CN202223018163.1U CN202223018163U CN219498974U CN 219498974 U CN219498974 U CN 219498974U CN 202223018163 U CN202223018163 U CN 202223018163U CN 219498974 U CN219498974 U CN 219498974U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model discloses a multi-battery pack hot-plug management circuit, which belongs to the technical field of battery management and comprises an MCU (micro control unit), batteries, a battery control output circuit, a battery voltage sampling circuit and a load circuit, wherein one or more batteries are arranged, each battery is correspondingly provided with a battery control output circuit, and when a plurality of battery control output circuits are combined in parallel for use, a battery pack control output circuit system is formed. In order to prevent the response speed of the system from being affected, the intelligent control system manages 8 batteries at most, and when the battery pack exceeds 8 batteries and even reaches 16 batteries, two management systems are used for parallel operation and are connected through synchronous signals to form a new management system. The discharging and the access of the battery cells can be effectively managed, the design of the current circuit of the battery is convenient to expand, the expansion management of the battery cells is convenient to increase, and the method is suitable for the high-voltage and high-current application scene of the battery.
Description
Technical Field
The utility model belongs to the technical field of battery management, and particularly relates to a multi-battery pack hot-plug management circuit.
Background
Solar energy and batteries are widely applied as new energy sources, and in some remote places, such as some remote areas or roads inconvenient to pull power grids, power supply of traffic equipment can be achieved by using solar energy and battery packs, but when the battery packs are used for a long time, battery replacement is inevitably needed, and in order to ensure normal operation of the equipment without power failure, a hot plug technology is needed.
In the existing application circuits of multiple groups of battery packs, the hot plug function is supported, but an effective management system is lacked, for example, only one battery is always in discharging when discharging, a plurality of batteries cannot be flexibly managed to discharge simultaneously, after all, the power of one battery is too small, so that the high-power application of the battery packs is limited, and the application state of the battery is often lacked to be indicated.
Disclosure of Invention
The utility model solves the technical problems that: the multi-battery pack hot-plug management circuit solves the problem that a battery pack discharging and battery access system is effectively managed, and is suitable for high-voltage and high-current application scenes of batteries.
The technical scheme is as follows: in order to solve the technical problems, the utility model adopts the following technical scheme:
the utility model provides a many group battery hot plug management circuit, includes MCU, battery control output circuit, battery voltage sampling circuit and load circuit, and the battery is provided with one or more, and every battery corresponds to sets up battery control output circuit, and when a plurality of battery control output circuits parallel combination used, constitutes a group battery control output circuit system.
Further, when the number of the batteries is required to be expanded to 9-16, two battery pack control output circuit systems are adopted to be used in parallel, and form a new system; parallel use also forms a new system if both battery pack control output circuitry has only one or more batteries.
Further, the battery control output circuit comprises a battery control output circuit A and a battery control output circuit B, the output pin of the MCU is connected with the battery control output circuit through a resistor R71 and a switch tube Q27, and the MCU outputs a signal to control the battery control output circuit to be conducted or closed so as to control the battery to discharge or not to discharge.
Further, the battery control output circuit corresponding to the battery 1 comprises a battery control output circuit A1 and a battery control output circuit B1, the battery control output circuit A1 comprises an output driving A1 circuit, an output A1 circuit and a filtering voltage stabilizing circuit, and the battery control output circuit B1 comprises an output driving B1 circuit, an output B1 circuit and a filtering voltage stabilizing circuit.
Further, an output end of the output driving A1 circuit is connected with an input end of the output A1 circuit, an output end of the output A1 circuit is connected with a battery, the output driving A1 circuit comprises a switching tube Q6, a switching tube Q3, a switching tube Q7, a switching tube Q1 and peripheral elements thereof, and the output A1 circuit comprises a switching tube Q5, a switching tube Q2, a MOS tube Q4 and peripheral elements thereof.
Further, in the output driving A1 circuit, the ch1_ct end of the MCU is connected to the base of the switching tube Q6 through a resistor R71, a switching tube Q27, a diode D6, a resistor R16, and a resistor R17, where the resistor R17 is connected in parallel to a capacitor C8, and the diode D7 is used as an e-pole reverse bias protection diode of the switching tube Q6; the diode D3 and the diode D4 are isolation diodes, the C electrode of the switching tube Q6 is connected with the b electrode of the switching tube Q3 through the diode D3, the resistor R7 and the resistor R5, and the C electrode of the switching tube Q3 is connected with a Q3-C network; meanwhile, the C pole of the switching tube Q6 is connected with the base electrode of the switching tube Q7 through a diode D4 and a resistor R14, the resistor R14 is connected with a capacitor C7 in parallel, the e pole of the switching tube Q7 is connected with a diode D8, the C pole of the switching tube Q7 is connected with the b pole of the switching tube Q1 through a resistor R13 and a resistor R9, the resistor R9 is connected with a capacitor C4 in parallel, and the C pole of the switching tube Q1 is connected with a Q1_C network.
Further, the C electrode of the switching tube Q1 is connected with the base electrode of the switching tube Q2 through a resistor R8, a capacitor C5 and a resistor R11 are connected in series and then connected at two ends of the resistor R8 in parallel, and the e electrode of the switching tube Q2 is connected with the G electrode of the MOS tube Q4 through a resistor R6; the Q3-C network is connected with the base electrode of the switch tube Q5 through a resistor R15, a capacitor C6 and a resistor R20 are connected in series and then connected at two ends of the resistor R15 in parallel, and the D pole of the MOS tube Q4 is connected with a diode D1.
Further, the battery voltage sampling circuit realizes detection of battery voltage, and the battery voltage sampling circuit comprises a diode D9, a resistor R22, a resistor R23 and a capacitor C9, wherein the diode D9 is an isolation diode, the resistor R22 and the resistor R23 are voltage dividing resistors, and the capacitor C9 is a filter capacitor.
Further, the state indicating circuit comprises a resistor R24, a resistor R25, an LED1 and an LED2, when the battery is connected to the battery 1 control output circuit, if the battery 1 control output circuit is in an on state, the LED2 is on, and the LED1 is off; if the battery 1 controls the output circuit to be in a closed state, the LED1 is turned on, and the LED2 is turned off; when no battery is connected to the battery 1 control output circuit, neither LED1 nor LED2 is lit.
Further, the load circuit comprises a circuit load R and a capacitor C25, and the capacitor C25 is an output filter capacitor.
The beneficial effects are that: compared with the prior art, the utility model has the following advantages:
the utility model relates to an intelligent control system for managing a plurality of batteries by adopting a high-speed MCU, in order to prevent the response speed of the system from being influenced, the system manages 8 batteries at most, when the battery pack exceeds 8 batteries and even reaches 16 batteries, two management systems are used for parallel operation, and the two systems are connected through a synchronous signal to form a new management system. The MCU performs load voltage detection on each battery in a time-sharing manner by using a fast polling mode so as to judge whether the voltage of the battery meets the discharge requirement, and if the voltage meets the discharge voltage requirement, the MCU controls the corresponding battery control output circuit to conduct and discharge, so that the high-voltage battery is prevented from charging the low-voltage battery; and if the battery of the system is connected in a discharging state, a green LED lamp is used for indicating, and if the battery is in a to-be-discharged state, a red LED is used for indicating, when the hot plug battery is detected to be connected in, the battery discharging switch tube is opened for 3 seconds, and the connector is prevented from spark during connection. The problem of in the hot plug technology application of many batteries, lack intelligent management system is solved, the discharge and the access of group battery can be managed effectively, the current circuit design that need enlarge of battery is convenient, the increase extension management of group battery is convenient, is fit for the high voltage heavy current application scene of group battery.
Drawings
Fig. 1 is a schematic block diagram of a system of 8 battery packs of a multi-battery pack hot-plug management circuit.
Fig. 2 is a schematic block diagram of a multi-battery hot-plug management circuit that extends to a battery system of 16 cells using the two systems.
Fig. 3 is a schematic diagram of a control output circuit of the battery pack hot plug management system battery 1.
Fig. 4 is a flowchart of a main procedure of a battery pack hot plug management method.
Detailed Description
The utility model will be further illustrated with reference to specific examples, which are carried out on the basis of the technical solutions of the utility model, it being understood that these examples are only intended to illustrate the utility model and are not intended to limit the scope thereof.
As shown in fig. 1, the multi-battery pack hot plug tube management circuit comprises an MCU, a battery control output circuit, a +5V voltage stabilizing circuit, a battery voltage sampling circuit, a battery and a load circuit. The battery control output circuit is one path of control output circuit in the system, and comprises a battery control output circuit A and a battery control output circuit B.
The number of the battery can be multiple, and each battery is correspondingly provided with a battery control output circuit, for example, a battery 1 is a battery 1 control output circuit, and the battery 1 consists of a battery control output circuit A1 and a battery control output circuit B1, a battery 2 is a battery 2 control output circuit, and the battery 2 consists of a battery control output circuit A2 and a battery control output circuit B2. As shown in fig. 1, when the battery 1 control output circuit and the same battery 2 control output circuit, battery 3 control output circuit, and the like are used in parallel combination (at most 8 paths), the battery pack control output circuit of the present system can be constituted. As shown in fig. 2, when the battery needs to be expanded to 9 or even 16, two systems can be used in parallel, and two systems form a new system; a new system can also be formed if both systems have only one or more batteries in parallel.
As shown in fig. 1 and 3, the output pin of the MCU is connected with the input end of the battery control output circuit through a resistor R71 and a switch tube Q27, a battery voltage sampling circuit is arranged between the MCU and the battery control output circuit, each battery control output circuit is connected with a status indication circuit, and the output end of each battery control output circuit is connected with a battery. The MCU outputs a signal to control the battery to control the on or off of the output circuit, thereby controlling the battery 1 to discharge or not to discharge. Taking battery 1 (BT 1, 51.2V) as an example, the ch1_ct pin of the MCU is connected to the input end of the battery 1 control output circuit through resistor R71 and a switch tube Q27, the output end of the battery 1 control output circuit is connected to battery 1, and the battery is correspondingly provided with a status indication circuit controlled by the MCU, where the status indication circuit includes red LED1 and green LED2.
In this embodiment, the battery 1 and its control output circuit are taken as examples, and the principle circuit is described: the battery 1 control output circuit consists of a battery control output circuit A1 and a battery control output circuit B1. Wherein the battery control output circuit A1 includes an output drive A1 circuit and an output A1 circuit (the output circuit can be extended to increase the output A2, the output A3, etc. to increase the output current), and a filter voltage stabilizing circuit. The battery control output circuit B1 includes an output driving B1 circuit and an output B1 circuit (the output circuit can be extended to increase the output B2, the output B3, and the like to increase the output current). The output end of the output drive A1 circuit is connected with the input end of the output A1 circuit, and the output end of the output A1 circuit is connected with the battery.
As shown in fig. 3, the filter voltage stabilizing circuit of the battery control output circuit A1: the filter voltage stabilizing circuit comprises a capacitor C2, a capacitor C3 and a diode DZ1 which are connected in parallel. DZ1 is a 15V voltage-stabilizing diode, so that the gate-source voltage of the MOS transistor Q4 is not lower than-15V, and the gate-source voltage safety of the MOS transistor Q4 is ensured.
The output driving A1 circuit mainly comprises a switching tube Q6, a switching tube Q3, a switching tube Q7, a switching tube Q1 and peripheral elements thereof, and specifically comprises a diode D6, a resistor R16, a capacitor C8, a resistor R17, the switching tube Q6, a diode D7, a diode D3, a resistor R7, a resistor R5, a capacitor C1, the switching tube Q3, a diode D4, a resistor R14, a capacitor C7, the switching tube Q7, a diode D8, a resistor R13, a resistor R9, a capacitor C4, a switching tube Q1, a diode D1 and the like. The CH 1-CT end of the MCU is connected with the base electrode of the switching tube Q6 through a resistor R71, a switching tube Q27, a diode D6, a resistor R16 and a resistor R17, the resistor R17 is connected with a capacitor C8 in parallel, and the diode D7 is used as an e-pole reverse bias protection diode of the switching tube Q6; the diode D3 and the diode D4 are isolation diodes, the C electrode of the switching tube Q6 is connected with the base electrode of the switching tube Q3 through the diode D3, the resistor R7 and the resistor R5, and the C electrode of the switching tube Q3 is connected with the Q3_C network; meanwhile, the C electrode of the switching tube Q6 is connected with the base electrode of the switching tube Q7 through a diode D4 and a resistor R14, the resistor R14 is connected with a capacitor C7 in parallel, the E electrode of the switching tube Q7 is connected with a diode D8, the C electrode of the switching tube Q7 is connected with the base electrode of the switching tube Q1 through a resistor R13 and a resistor R9, and the resistor R9 is connected with a capacitor C4 in parallel. The C pole of the switch tube Q1 is connected with a Q1_C network. The diode D8 is an e-pole bias diode of the switching tube Q7, and counteracts the voltage difference generated by the diode D4 at the b pole and the e pole of the switching tube Q7, so that the switching tube Q7 can be reliably cut off; diode D1 is the outside damping diode of MOS pipe Q4, avoids MOS pipe Q4 to appear reverse breakdown.
The output A1 circuit mainly comprises a switch tube Q5, a switch tube Q2, a MOS tube Q4 and peripheral elements thereof, and specifically comprises a resistor R8, a capacitor C5, a resistor R11, a switch tube Q2, a diode D5, a resistor R6, a MOS tube Q4, a capacitor C6, a resistor R15, a resistor R20 and a switch tube Q5. The C electrode of the switching tube Q1 is connected with the base electrode of the switching tube Q2 through a resistor R8, a capacitor C5 and a resistor R11 are connected in series and then connected at two ends of the resistor R8 in parallel, and the e electrode of the switching tube Q2 is connected with the G electrode of the MOS tube Q4 through a resistor R6; the Q3-C network is connected with the base electrode of the switch tube Q5 through a resistor R15, a capacitor C6 and a resistor R20 are connected in series and then connected at two ends of the resistor R15 in parallel, and the D pole of the MOS tube Q4 is connected with a diode D1. The MOS tube Q4 is an output power switching tube, the D2 is an isolation diode, when the switching tube Q5 is cut off, the switching tube Q2 is rapidly conducted, the MOS tube Q4 is rapidly cut off, the MOS tube Q4 and the switching tube Q17 of the output B1 circuit are connected in series, the reverse current filling of the battery pack can be prevented, the two devices are connected in series for use, the voltage division function is achieved in high-voltage output, and the circuit is enabled to work reliably. The output A1 circuit is identical to the output A2 circuit and the output A3 circuit, and when the parallel connection is added, the output current is increased.
The battery control output circuit B1 comprises an output driving B1 circuit, an output B1 circuit and a filtering voltage stabilizing circuit, wherein the output end of the output driving B1 circuit is connected with the input end of the output B1 circuit, and the output B1 circuit is connected with the load circuit. The filtering voltage stabilizing circuit of the battery control output circuit B1 comprises a capacitor C14, a capacitor C15 and a diode DZ2, wherein the DZ2 is a 15V voltage stabilizing diode, so that the gate-source voltage of the switching tube Q17 cannot be lower than-15V, and the gate-source voltage safety of the switching tube Q17 is ensured.
The output driving B1 circuit mainly comprises a switching tube Q19, a switching tube Q16, a switching tube Q20, a switching tube Q14, and peripheral elements thereof, specifically comprises a diode D18, a resistor R51, a capacitor C20, a resistor R52, a resistor Q19, a diode D15, a resistor R42, a resistor R40, a capacitor C13, a switching tube Q16, a diode D16, a resistor R49, a capacitor C19, a switching tube Q20, a diode D20, a resistor R48, a resistor R44, a capacitor C16, a switching tube Q14, a diode D13, and the like, and the specific circuit connection structure is the same as that of the output driving A1, and is not described again. Wherein the diode D19 is an e-pole reverse bias protection diode of Q19; diode D15 and diode D16 are isolation diodes; diode D20 is an e-pole bias diode of Q20, and counteracts the voltage difference generated by diode D16 between the b pole and the e pole of Q20, so that Q20 can be reliably cut off; diode D13 is a Q17 external damping diode that avoids reverse breakdown of Q17.
The output B1 circuit mainly comprises a switch tube Q18, a switch tube Q15, a switch tube Q17 and peripheral elements thereof, and specifically comprises an R43, a capacitor C17, a resistor R46, a switch tube Q15, a diode D14, a diode D17, a resistor R41, a switch tube Q17, a capacitor C18, a resistor R50, a resistor R55 and a switch tube Q18, and the specific circuit connection structure is the same as that of the output A1 circuit and is not repeated. The Q17 is an output power switching tube, the diode D14 is an isolation diode, when the Q18 is cut off, the Q15 is rapidly conducted, the Q17 is rapidly cut off, the Q17 and the Q4 of the output A1 circuit are connected in series, the reverse current filling of the battery pack can be prevented, the two devices are used in series, and the voltage division function is achieved in high-voltage output, so that the circuit is reliable in operation. The output B1 circuit is identical to the output B2 circuit and the output B3 circuit, and when the parallel connection is added, the output current is increased.
+5v voltage stabilizing circuit: the battery voltage of +51.2V_1 is regulated to +5V to supply power to the MCU.
The battery voltage sampling circuit detects the voltage of a battery, and the battery voltage sampling circuit consists of a diode D9, a resistor R22, a resistor R23 and a capacitor C9, wherein the D9 is an isolation diode, the resistors R22 and R23 are voltage dividing resistors, and the C9 is a filter capacitor.
Status indication circuit: including resistor R24, resistor R25, LED1, and LED2. When the battery is connected to the battery 1 control output circuit, if the battery 1 control output circuit is in an on state, the LED2 is turned on, and the LED1 is turned off; if the battery 1 controls the output circuit to be in a closed state, the LED1 is turned on, and the LED2 is turned off; when no battery is connected to the battery 1 control output circuit, neither LED1 nor LED2 is lit.
And a load circuit: the load circuit is composed of R and a capacitor C25, wherein R is a circuit load, and the capacitor C25 is an output filter capacitor.
The working principle of the battery control output circuit is as follows:
when the ch1_ct pin output of the MCU suddenly changes to low level, the transistor Q27 is turned off and the c-pole of Q27 suddenly changes to high level. At this time, the diode D6 of the battery control output circuit A1 is turned off, due to the characteristic of the capacitor, the voltage at the two ends of the capacitor C8 cannot be suddenly changed, but the current suddenly changes, which is equivalent to a momentary short circuit, the switching tube Q6 is rapidly turned on to cause the voltage suddenly changes of the C pole to be low level, which is equivalent to an open circuit after the capacitor C8 is fully charged, the switching tube Q6 is driven by the current through the resistor R17 to be turned on, when the voltage suddenly changes of the C pole of the switching tube Q6 to be low level, one path causes the sudden change of the current of the capacitor C1 through the diode D3, the other path causes the switching tube Q7 and the switching tube Q1 to be rapidly turned off through the diode D4, which is equivalent to a momentary short circuit, the switching tube Q3_c network suddenly changes to be high level, which is equivalent to an open circuit after the capacitor C1 is fully charged, the switching tube Q3 is driven by the current through the resistor R5, which is equivalent to a sudden change of the current suddenly changes of the high level, which is equivalent to cause the switching tube Q6 is turned on, and when the capacitor C6 is fully charged, the current suddenly changes of the Q3_c network is high level, which is equivalent to cause the current suddenly changes of the switching tube Q6, which is equivalent to be rapidly turned on, and the switching tube Q5 is rapidly turned on by the current through the high level, which is equivalent to be turned on by the current through the resistor R5, which is equivalent to be turned on by the voltage when the voltage Q5 and the voltage 2 is fully charged to be low to be turned off 2, and the voltage by the voltage of the voltage 2, which is immediately turned on 2 by the voltage of the voltage 2 and the voltage of the transistor Q2.
When the ch1_ct pin output of the MCU suddenly changes to low level, the transistor Q27 is turned off and the c-pole of Q27 suddenly changes to high level. At this time, the diode D18 of the battery control output circuit B1 is turned off, due to the characteristic of the capacitor, the voltage across the capacitor C20 cannot be suddenly changed but is suddenly changed to a current, which is equivalent to a momentary short circuit, the switching tube Q19 is rapidly turned on to cause the sudden change of the voltage of the C pole to be a low level, the switching tube Q19 is correspondingly turned on by the current through the resistor R52 after the capacitor C20 is fully charged, when the voltage suddenly changed to a low level, one path of the voltage suddenly changes to cause the sudden change of the current of the capacitor C13 through the diode D15, the other path of the voltage rapidly turns off the switching tube Q20 and the switching tube Q14 through the diode D16, the sudden change of the current of the capacitor C13 corresponds to a momentary short circuit, the switching tube Q16 is suddenly changed to a high level, the switching tube Q16 is correspondingly turned on by the current through the current of the resistor R40 after the capacitor C13 is fully charged, the current of the switching tube Q18 is correspondingly suddenly changed to a short circuit, the switching tube Q18 is rapidly turned on by the high level of the current through the resistor R52, and the switching tube Q18 is suddenly changed to a high level, when the voltage of the capacitor C18 is fully charged, the voltage suddenly changes to the voltage of the switching tube Q18 is suddenly changes to a low level, and the voltage of the MOS transistor Q17 is suddenly changes to a low level, and the voltage of the transistor Q17 is suddenly changes to be a low to the voltage through the transistor Q17, the Q17. Instead, the voltage and current of the battery BT1 are output to the load circuits R and C25, i.e., the battery 1 controls the output circuit to be in an on state, the green LED2 is turned on, and the red LED1 is turned off.
When the ch1_ct pin output of the MCU suddenly changes to high level, the transistor Q27 is turned on, and the c pole of Q27 suddenly changes to low level. At this time, D6 of the battery control output circuit A1 is turned on, b of Q6 is turned off at extremely low level by R16, R17 and C8, C of Q6 is turned off at extremely high level, D3 is turned off, b of Q3 is at high level, Q3 is turned off, the network q3_c is at low level, b of Q5 is turned off at extremely low level by R15, C6 and R20, and D2 is turned off; meanwhile, since the C of Q6 is extremely high, D4 is turned off, the turn-off of D4 causes the current mutation of C7, the b of Q7 is suddenly changed to high to turn on, the C of Q7 is extremely low, the b of Q1 is extremely low to turn on through R13, R9 and C4, the C of Q1 outputs high level to turn on Q2 through R8, C5 and R11, and since D2 is also turned off at this time, the gate voltage of Q4 is rapidly raised to turn off, thereby turning off the path of the battery +51.2v_1 to the D end of the network.
When the output of the CH1_CT pin of the MCU suddenly changes to a high level, the switching tube Q27 is conducted, and the c pole of the switching tube Q27 suddenly changes to a low level. At this time, diode D18 of battery control output circuit B1 is turned on, B of switching transistor Q19 is turned off at extremely low level by resistors R51, R52 and C20, C of switching transistor Q19 is extremely high level, diode D15 is turned off, B of switching transistor Q16 is high level, switching transistor Q16 is turned off, network q16_c is low level, B of switching transistor Q18 is turned off at extremely low level by resistors R50, C18 and R50, and D14 is turned off; meanwhile, since the C pole of the switching tube Q19 is extremely high, the diode D16 is turned off, the turn-off of the diode D16 causes the abrupt change of the current of the C19, the b pole of the switching tube Q20 is suddenly changed to high level to be turned on, the C pole of the switching tube Q20 is extremely low level to be turned on, the b pole of the switching tube Q14 is extremely low level to be turned on through the resistor R48, the resistor R44 and the capacitor C16, the C pole of the switching tube Q14 is high level to be turned on through the resistor R43, the capacitor C17 and the resistor R46, and since the diode D14 is turned off at this time, the gate voltage of the MOS tube Q17 is rapidly increased to be turned off, and the path that the +51.2v_out terminal reaches the network D terminal is closed. Instead, the voltage and current of the battery BT1 cannot be output to the load circuit R and the capacitor C25 any more, that is, the battery 1 controls the output circuit to be in the off state, the red LED1 is turned on, and the green LED2 is turned off.
The utility model also discloses a multi-battery pack hot-plug management method, the MCU uses a polling mode to carry out on-load voltage detection on the batteries of each battery control output circuit in a time-sharing way, records each voltage value, judges which battery voltage meets the discharge voltage requirement (for example, the highest battery voltage is used as a standard, the condition that the access battery voltage is not lower than 0.3V of the highest voltage is met), if the discharge requirement is met, controls the corresponding battery control output circuit to be conducted, the battery is discharged, when the voltage difference is too large, the high-voltage battery charges the low-voltage battery with high current, at the moment, the green LED (the LED2 of the battery 1 control output circuit) of the corresponding battery control output circuit is lighted, and the red LED (the LED1 of the battery 1 control output circuit) is extinguished; when the voltage of the connected battery does not meet the discharge voltage requirement, the battery is not discharged, at the moment, a red LED (an LED1 of the battery 1 control output circuit) of the corresponding battery control output circuit is lighted, and a green LED (an LED2 of the battery 1 control output circuit) is extinguished; if the battery control output circuit is not connected with the battery, the LEDs of the corresponding battery control output circuit are turned off.
The system polling detection method is that other battery control output circuits are disconnected, only the battery 1 control output circuit is left to be conducted, and the voltage of the battery 1 is detected; then the control output circuit of the battery 2 is conducted, then the control output circuit of the battery 1 is closed, and the voltage of the battery 2 is detected; then the control output circuit of the battery 3 is conducted, then the control output circuit of the battery 2 is closed, and the voltage of the battery 3 is detected; and then the control output circuit of the battery 4 is conducted, then the control output circuit of the battery 3 is closed, the voltage of the battery 4 is detected, and the 8 paths of battery control output circuits are polled in sequence and then are circularly detected.
When the hot plug battery is detected to be connected, the delay is 3 seconds, and after the battery connector is in good contact, the MCU controls the power supply discharging switch tube to prevent the connector from generating sparks during connection.
When the batteries need to be expanded to 9 or even 16, two systems can be used in parallel, or the number of the batteries is less than 8, and two management systems are also used, and the two systems use synchronous information to form a new system to work.
The flow of the multi-battery pack hot-drawing tube management method is shown in fig. 4, and the specific steps are as follows:
s1: the MCU of the system is powered on and initialized,
s2: detecting the voltage of an online battery after the initialization is finished;
s3: then opening the discharging loop of the battery meeting the discharging voltage requirement,
s4: detecting the number of the online batteries of the system, judging whether the number of the online batteries is 1, if only one battery is online, detecting whether a single battery synchronizing signal exists by the MCU, if no single battery synchronizing signal exists, possibly no second system exists, or the number of the online second systems of more than 1 battery exists, sending the single battery synchronizing signal by the MCU at the moment, preventing the second system of only 1 battery from being connected with the single battery synchronizing signal, and detecting the battery voltage according to the time appointed by the single battery synchronizing signal; if the single cell synchronizing signal exists, detecting the voltage of the battery according to the time appointed by the single cell synchronizing signal, if the voltage of the battery is detected to be not in accordance with the discharging requirement, closing the discharging output of the battery, and if the voltage of the battery is in accordance with the discharging requirement, detecting whether the battery is connected; and when the number of the batteries is not 1, detecting whether a multi-battery synchronous signal exists, if so, indicating that another system has battery access with higher voltage, closing battery discharge loops of all discharged batteries by the system, if not, detecting battery voltage of a battery pack in a polling mode, disconnecting battery output with voltage not meeting discharge requirements, then detecting whether the batteries are accessed, if not, detecting the number of the online batteries, if so, delaying for 3 seconds, controlling the accessed batteries to discharge, and detecting the number of the online batteries.
The foregoing is merely a preferred embodiment of the present utility model and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present utility model, which are intended to be comprehended within the scope of the present utility model.
Claims (6)
1. The multi-battery pack hot-plug management circuit is characterized by comprising an MCU, a battery control output circuit, a battery voltage sampling circuit and a load circuit, wherein one or more batteries are arranged, each battery is correspondingly provided with the battery control output circuit, and when the plurality of battery control output circuits are combined in parallel for use, a battery pack control output circuit system is formed;
the battery control output circuit comprises a battery control output circuit A and a battery control output circuit B, the output pin of the MCU is connected with the battery control output circuit through a resistor R71 and a switch tube Q27, and the MCU outputs a signal to control the battery control output circuit to be conducted or closed so as to control the battery to discharge or not to discharge;
the battery voltage sampling circuit is used for detecting battery voltage and comprises a diode D9, a resistor R22, a resistor R23 and a capacitor C9, wherein the diode D9 is an isolation diode, the resistor R22 and the resistor R23 are voltage dividing resistors, and the capacitor C9 is a filter capacitor;
the load circuit comprises a circuit load R and a capacitor C25, and the capacitor C25 is an output filter capacitor.
2. The multi-battery hot plug management circuit of claim 1, wherein: the battery control output circuit corresponding to the battery 1 comprises a battery control output circuit A1 and a battery control output circuit B1, wherein the battery control output circuit A1 comprises an output driving A1 circuit, an output A1 circuit and a filtering voltage stabilizing circuit, and the battery control output circuit B1 comprises an output driving B1 circuit, an output B1 circuit and a filtering voltage stabilizing circuit.
3. The multi-battery hot plug management circuit of claim 2, wherein: the output end of the output drive A1 circuit is connected with the input end of the output A1 circuit, the output end of the output A1 circuit is connected with a battery, the output drive A1 circuit comprises a switching tube Q6, a switching tube Q3, a switching tube Q7, a switching tube Q1 and peripheral elements thereof, and the output A1 circuit comprises a switching tube Q5, a switching tube Q2, a MOS tube Q4 and peripheral elements thereof.
4. The multi-battery hot plug management circuit of claim 3, wherein: in the output driving A1 circuit, a CH1_CT end of the MCU is connected with a base electrode of the switching tube Q6 through a switching tube Q27, a diode D6, a resistor R16 and a resistor R17, a capacitor C8 is connected in parallel with the resistor R17, and the diode D7 is used as an e-pole reverse bias protection diode of the switching tube Q6; the diode D3 and the diode D4 are isolation diodes, the C electrode of the switching tube Q6 is connected with the b electrode of the switching tube Q3 through the diode D3, the resistor R7 and the resistor R5, and the C electrode of the switching tube Q3 is connected with a Q3-C network; meanwhile, the C pole of the switching tube Q6 is connected with the base electrode of the switching tube Q7 through a diode D4 and a resistor R14, the resistor R14 is connected with a capacitor C7 in parallel, the e pole of the switching tube Q7 is connected with a diode D8, the C pole of the switching tube Q7 is connected with the b pole of the switching tube Q1 through a resistor R13 and a resistor R9, the resistor R9 is connected with a capacitor C4 in parallel, and the C pole of the switching tube Q1 is connected with a Q1_C network.
5. The multi-battery hot plug management circuit of claim 3, wherein: the C electrode of the switching tube Q1 is connected with the base electrode of the switching tube Q2 through a resistor R8, a capacitor C5 and a resistor R11 are connected in series and then connected at two ends of the resistor R8 in parallel, and the e electrode of the switching tube Q2 is connected with the G electrode of the MOS tube Q4 through a resistor R6; the Q3-C network is connected with the base electrode of the switch tube Q5 through a resistor R15, a capacitor C6 and a resistor R20 are connected in series and then connected at two ends of the resistor R15 in parallel, and the D pole of the MOS tube Q4 is connected with a diode D1.
6. The multi-battery hot plug management circuit of claim 1, wherein: the state indicating circuit comprises a resistor R24, a resistor R25, an LED1 and an LED2, when the battery is connected to the battery 1 control output circuit, if the battery 1 control output circuit is in an on state, the LED2 is on, and the LED1 is off; if the battery 1 controls the output circuit to be in a closed state, the LED1 is turned on, and the LED2 is turned off; when no battery is connected to the battery 1 control output circuit, neither LED1 nor LED2 is lit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202223018163.1U CN219498974U (en) | 2022-11-14 | 2022-11-14 | Multi-battery pack hot plug management circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223018163.1U CN219498974U (en) | 2022-11-14 | 2022-11-14 | Multi-battery pack hot plug management circuit |
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| CN202223018163.1U Active CN219498974U (en) | 2022-11-14 | 2022-11-14 | Multi-battery pack hot plug management circuit |
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