Battery management system for household balcony energy storage

Abstract

The utility model discloses a battery management system for household balcony energy storage. The system is connected with a battery and comprises an MCU chip U14, an AFE chip U17, a voltage acquisition module (100), a current acquisition module (200), a temperature acquisition module (300), a charging current detection module (400), a discharging current detection module (500) and a charging and discharging MOS module (600). The MCU chip U14 is respectively connected with the AFE chip U17, the temperature acquisition module (300), the charging current detection module (400) and the discharging current detection module (500); the AFE chip U17 is respectively connected with the voltage acquisition module (100), the current acquisition module (200) and the charging and discharging MOS module (600). According to the utility model, the on-off of the charging and discharging of the battery is controlled by detecting the voltage, temperature and current information of the battery, the over-high and over-high current, voltage and overheating of the battery can be prevented, the battery is further protected, and the battery protection circuit has the advantages of strong reliability and high safety.

Description

TECHNICAL FIELD

[0001] The utility model relates to balcony energy storage technical field, specifically a kind of battery management system for family balcony energy storage. BACKGROUND

[0002] Household balcony energy storage system and energy storage battery are important components of modern family energy management, which provide more independent, environmentally friendly and economical energy solutions for families. It has the following advantages: 1. Enhance energy independence: reduce dependence on the power grid and improve household energy self-sufficiency. 2. Environmental protection and energy saving: use renewable energy to reduce carbon emissions. 3. Reduce electricity costs: store solar power to reduce electricity costs. For example, the Chinese utility model patent with the authorization announcement number CN204465061U discloses a new type of household energy storage battery, which comprises a battery management system, a charging switch and a discharging switch are arranged in the battery management system, one end of the charging switch is connected to the positive electrode of the battery, the discharging switch is connected with a fuse and the negative electrode of the battery, and the battery management system is connected with a display screen, a battery switch and a communication terminal outside. The utility model patent controls the switch of battery charging and discharging through the charging switch and the discharging switch of the battery management system, and realizes the simple management of the battery; but the management effect of the utility model may be limited when facing a large number of batteries or the batteries are in some extreme conditions, and the reliability is poor and the safety is low. UTILITY MODEL CONTENT

[0003] The utility model aims to provide a kind of battery management system for family balcony energy storage. The utility model controls the on-off of battery charging and discharging by detecting the voltage, temperature and current information of battery, can prevent battery current, voltage and overheating, and further protect battery, with the advantages of strong reliability and high safety.

[0004] The technical scheme of the utility model: a kind of battery management system for family balcony energy storage, connected with battery, including MCU chip U14, AFE chip U17, voltage acquisition module, current acquisition module, temperature acquisition module, charging current detection module, discharging current detection module and charge-discharge MOS module;The MCU chip U14 is connected with AFE chip U17, temperature acquisition module, charging current detection module and discharging current detection module respectively;The AFE chip U17 is connected with voltage acquisition module, current acquisition module and charge-discharge MOS module respectively;The charge-discharge MOS module, voltage acquisition module are connected with battery respectively;The current acquisition module is connected with charge-discharge MOS module;The charging current detection module and discharging current detection module are connected with current acquisition module respectively.

[0005] The battery management system for balcony energy storage of the family has a plurality of voltage acquisition subunits connected with the voltage acquisition module; the voltage acquisition subunits are respectively connected with AFE chips U17; the voltage acquisition subunits are connected in parallel; the voltage acquisition subunits comprise resistors RB16, R18, R234, R238, R243, a capacitor C70, diodes D19, D62, a voltage stabilizing diode D49 and a triode Q58; one end of the resistor R18 is connected with one end of the resistor R234 and the positive electrode of the diode D19, and is connected with a port CELL16; the other end of the resistor R234 is connected with one end of the capacitor C70, the negative electrode of the voltage stabilizing diode D62 and the AFE chip U17; the negative electrode of the diode D19 is connected with one end of the resistor RB16, and the other end of the resistor RB16 is connected with the collector of the triode Q58; the base of the triode Q58 is connected with one end of the resistor R238 and the negative electrode of the diode D62; the other end of the resistor R18 is connected with the emitter of the triode Q58, the positive electrode of the diode D62 and one end of the resistor R243; the other end of the resistor R238 is connected with the other end of the capacitor C70, the positive electrode of the voltage stabilizing diode D49, the other end of the resistor R243 and the AFE chip U17.

[0006] The foregoing battery management system for balcony energy storage of a family, the charge-discharge MOS module includes resistance R10, resistance R21, resistance R31, resistance R41, resistance R148, resistance R191, resistance R457, sampling resistance RS17, diode D5, diode D32, diode D380, voltage stabilizing diode D45, voltage stabilizing diode D57, fuse FS1, TVS tube TVS5, TVS tube TVS14, TVS tube TVS26, TVS tube TVS34, capacitor C10, capacitor C13, MOS tube M1 and MOS tube M2;The charge-discharge MOS module is connected with a plurality of charge-discharge MOS subunits, and the charge-discharge MOS subunits are connected in parallel;One end of the resistance R10 is connected with the negative electrode of the diode D32 and is connected with the port DSG;The other end of the resistance R10 is connected with the positive electrode of the diode D32, the negative electrode of the voltage stabilizing diode D45, one end of the resistance R31, one end of the TVS tube TVS34 and the charge-discharge MOS subunit;The other end of the resistance R31 is connected with one end of the resistance R148 and the gate of the MOS tube M1;The positive electrode of the voltage stabilizing diode D45 is connected with the other end of the TVS tube TVS34, the other end of the resistance R148, the source of the MOS tube M1 and the charge-discharge MOS subunit, and is connected with the port D_A;The drain of the MOS tube M1 is connected with the drain of the MOS tube M2, the positive electrode of the diode D380, the positive electrode of the diode D5 and the charge-discharge MOS subunit;The negative electrode of the diode D380 is connected with the negative electrode of the diode D5, one end of the sampling resistance RS17 and one end of the fuse FS1;The other end of the sampling resistance RS17 is connected with the other end of the fuse FS1, one end of the resistance R457, one end of the TVS tube TVS5, one end of the TVS tube TVS14 and one end of the capacitor C10, and is connected with the port B+;The gate of the MOS tube M2 is connected with one end of the resistance R41 and one end of the resistance R191;The other end of the resistance R41 is connected with one end of the TVS tube TVS26, the negative electrode of the voltage stabilizing diode D57 and the charge-discharge MOS subunit, and is connected with the port CHG;The source of the MOS tube M2 is connected with the other end of the resistance R191, the other end of the TVS tube TVS26, the positive electrode of the voltage stabilizing diode D57, one end of the resistance R21, the other end of the TVS tube TVS5, the other end of the TVS tube TVS14, one end of the capacitor C13 and the charge-discharge MOS subunit, and is connected with the port P-;The other end of the resistance R21 is connected with the other end of the resistance R457;The other end of the capacitor C13 is connected with the other end of the capacitor C10.

[0007] The battery management system for balcony energy storage of the foregoing, the charge-discharge MOS subunit includes resistors R42, R79, R149, R231, MOS tube M3 and MOS tube M4; one end of the resistor R79 is connected with the charge-discharge MOS module; the other end of the resistor R79 is connected with one end of the resistor R149 and the gate of the MOS tube M3; the other end of the resistor R149 is connected with the source of the MOS tube M3 and the charge-discharge MOS module; the drain of the MOS tube M3 is connected with the drain of the MOS tube M4 and the charge-discharge MOS module; the gate of the MOS tube M4 is connected with one end of the resistor R231 and one end of the resistor R42; the other end of the resistor R231 is connected with the source of the MOS tube M4 and the charge-discharge MOS module; the other end of the resistor R42 is connected with the charge-discharge MOS module.

[0008] The battery management system for balcony energy storage of the foregoing, the current collection module is connected with a plurality of current collection subunits, and the current collection subunits are connected in parallel; the current collection module includes capacitors C120, C125, C128, resistor R378 and resistor R379; the current collection subunit includes a sampling resistor RS1; one end of the capacitor C120 is connected with one end of the resistor R378, one end of the capacitor C125 and the AFE chip U17; the other end of the capacitor C125 is grounded; the other end of the capacitor C120 is connected with one end of the resistor R379, one end of the capacitor C128 and the AFE chip U17; the other end of the capacitor C128 is grounded; one end of the resistor R378 is connected with one end of the sampling resistor RS1; the other end of the resistor R378 is connected with the other end of the sampling resistor RS1.

[0009] The foregoing battery management system for balcony energy storage of family, the charging current detection module includes resistance R357, resistance R358, resistance R365, resistance R366, resistance R371, resistance R372, resistance R376, resistance R384, resistance R385, resistance R388, resistance R389, capacitor C17, capacitor C20, capacitor C173, capacitor C175, capacitor C176, capacitor C177, capacitor C178, capacitor C179, capacitor C180, capacitor C171 and chip U24;The one end of resistance R357 is connected with one end of capacitor C17 and one end of resistance R366 and is provided with port DA-CHG-CC;The other end of capacitor C17 is grounded;The other end of resistance R366 is grounded;The other end of resistance R357 is connected with one end of resistance R358, one end of capacitor C174 and V1O pin of chip U24;The other end of resistance R358 is connected with the other end of capacitor C174, one end of resistance R372, one end of capacitor C178, one end of capacitor C175 and V1- pin of chip U24;The other end of resistance R372 is connected with the other end of capacitor C178 and is provided with port D_A;The other end of capacitor C175 is connected with one end of resistance R376, one end of resistance R385, one end of capacitor C176 and V1+ pin of chip U24;The other end of resistance R376 is provided with port BAT-;The other end of resistance R385 is grounded;The other end of capacitor C176 is connected with VSS pin of chip U24 and is grounded;One end of capacitor C173 is connected with VCC pin of chip U24 and is connected with 3.3V voltage source;The other end of capacitor C173 is grounded;One end of resistance R365 is connected with one end of resistance R371, one end of capacitor C177 and V2O pin of chip U24;The other end of resistance R365 is connected with one end of capacitor C20 and is provided with port DA-CHG-CC1;The other end of capacitor C20 is grounded;The other end of resistance R371 is connected with the other end of capacitor C177, one end of resistance R389, one end of capacitor C181, one end of capacitor C179 and V2- pin of chip U24;The other end of resistance R389 is connected with the other end of capacitor C181 and port D_A;The other end of capacitor C179 is connected with one end of resistance R388, one end of resistance R384, one end of capacitor C180 and V2+ pin of chip U24;The other end of resistance R388 is connected with port BAT-;The other end of resistance R384 is grounded;The other end of capacitor C180 is grounded.

[0010] The foregoing battery management system for balcony energy storage of family, the discharge current detection module includes resistance R225, resistance R227, resistance R236, resistance R237, resistance R245, resistance R294, resistance R392, resistance R393, resistance R397, resistance R404, resistance R405, capacitor C2, capacitor C30, capacitor C113, capacitor C136, capacitor C140, capacitor C164, capacitor C168, capacitor C182, capacitor C183, capacitor C184, capacitor C185 and chip U23;One end of the resistance R227 is connected to one end of the capacitor C136 and one end of the resistance R236, and is connected with the port DA-DSG-CC;The other end of the capacitor C136 is grounded;The other end of the resistance R236 is grounded;The other end of the resistance R227 is connected to one end of the resistance R225, one end of the capacitor C2 and the V1O pin of the chip U23;The other end of the resistance R225 is connected to the other end of the capacitor C2, one end of the resistance R237, one end of the capacitor C168, one end of the capacitor C113 and the V1- pin of the chip U23;The other end of the resistance R237 is connected to the other end of the capacitor C168 and the port BAT-;The other end of the capacitor C113 is connected to one end of the resistance R294, one end of the resistance R245, one end of the capacitor C164 and the V1+ pin of the chip U23;The other end of the resistance R294 is connected to the port D_A;The other end of the resistance R245 is grounded;The other end of the capacitor C164 is connected to the VSS pin of the chip U23 and grounded;One end of the capacitor C30 is connected to the VCC pin of the chip U23 and connected to a 3.3V voltage source;The other end of the capacitor C30 is grounded;One end of the resistance R392 is connected to one end of the resistance R393, one end of the capacitor C140 and the V2O pin of the chip U24;The other end of the resistance R365 is connected to one end of the capacitor C20 and is connected with the port DA-DSG-CC1;The other end of the capacitor C140 is grounded;The other end of the resistance R393 is connected to the other end of the capacitor C182, one end of the resistance R405, one end of the capacitor C185, one end of the capacitor C183 and the V2- pin of the chip U23;The other end of the resistance R405 is connected to the other end of the capacitor C185 and the port BAT-;The other end of the capacitor C183 is connected to one end of the resistance R404, one end of the resistance R397, one end of the capacitor C184 and the V2+ pin of the chip U23;The other end of the resistance R404 is connected to the port D_A;The other end of the resistance R397 is grounded;The other end of the capacitor C184 is grounded.

[0011] The temperature acquisition module comprises a thermistor RT2, a resistor R307, a resistor R308, a resistor R309 and a capacitor C148; one end of the thermistor RT2 is connected with one end of the resistor R308 and a 3.3V voltage source; the other end of the thermistor RT2 is connected with the other end of the resistor R308, one end of the resistor R307, one end of the resistor R309 and one end of the capacitor C148; the other end of the resistor R307 is grounded; the other end of the capacitor C148 is grounded; and the other end of the resistor R309 is connected with a port MOS-NTC.

[0012] Compared with the prior art, the voltage acquisition module of the utility model acquires the voltage information of the battery, and transmits the voltage information of the battery to the MCU chip U14 through the AFE chip U17; the temperature acquisition module acquires the temperature information of the charge-discharge MOS module, and transmits the temperature information to the MCU chip U14; the charge current detection module and the discharge current detection module acquire the current information of the charge-discharge MOS module when charging and discharging the battery according to the current acquisition module, and transmit the current information to the MCU chip U14; the MCU chip U14 sends control information to the AFE chip U17 according to the voltage, temperature and current information, and the AFE chip U17 controls the on-off of the charge-discharge MOS module according to the control information, prevents the current and voltage from being too high and overheating, and further protects the battery, and has the advantages of high reliability and high safety. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is the circuit diagram of the MCU chip U17;

[0014] Figure 2 is the circuit diagram of the voltage acquisition module;

[0015] Figure 3 is the circuit diagram of the AFE chip U17;

[0016] Figure 4 is the circuit diagram of the voltage acquisition module;

[0017] Figure 5 is the circuit diagram of the charge-discharge MOS module and the current acquisition module;

[0018] Figure 6 is the circuit diagram of the charge-discharge MOS subunit and the current acquisition subunit;

[0019] Figure 7 is the circuit diagram of the charge-discharge MOS subunit;

[0020] Figure 8 is the circuit diagram of the temperature acquisition module;

[0021] Figure 9is a circuit diagram of a charging current detection module;

[0022] Figure 10 is a circuit diagram of a discharging current detection module;

[0023] Figure 11 is a circuit diagram of a power supply module;

[0024] Figure 12 is a circuit diagram of an upper computer communication module.

[0025] The signs in the drawings are: 100-voltage acquisition module, 110-voltage acquisition subunit, 200-current acquisition module, 210-current acquisition subunit, 300-temperature acquisition module, 400-charging current detection module, 500-discharging current detection module, 600-charging and discharging MOS module, 610-charging and discharging MOS subunit. DETAILED DESCRIPTION

[0026] The utility model will be further described below in combination with the drawings and examples, but it is not as the basis for limiting the utility model.

[0027] Embodiment: the battery management system for the energy storage of the family balcony is connected with the battery, including MCU chip U14, AFE chip U17, voltage acquisition module 100, current acquisition module 200, temperature acquisition module 300, charging current detection module 400, discharging current detection module 500 and charging and discharging MOS module 600;The MCU chip U14 is ST32 master control chip, is used for controlling the normal operation of whole battery management system and transmission data, and its inside integrates watchdog system.The MCU chip U14 is connected AFE chip U17, temperature acquisition module 300, charging current detection module 400 and discharging current detection module 500 respectively;The AFE chip U17 is connected voltage acquisition module 100, current acquisition module 200 and charging and discharging MOS module 600 respectively;The charging and discharging MOS module 600, voltage acquisition module 100 are connected with the battery respectively;The current acquisition module 200 is connected charging and discharging MOS module 600;The charging current detection module 400 and discharging current detection module 500 are connected current acquisition module 200 respectively.The MCU chip U14 is as follows: Figure 1As shown, the voltage acquisition module 100 collects the voltage information of the battery, and transmits the voltage information of the battery to the MCU chip U14 through the AFE chip U17; the temperature acquisition module 300 collects the temperature information of the charge-discharge MOS module 600, and transmits the temperature information to the MCU chip U14; the charging current detection module 400 and the discharging current detection module 500 collect the current information of the charge-discharge MOS module 600 when charging and discharging the battery according to the current acquisition module 200, and transmit the current information to the MCU chip U14; the MCU chip U14 sends control information to the AFE chip U17 according to the voltage, temperature and current information, and the AFE chip U17 controls the on-off of the charge-discharge MOS module 600 according to the control information, prevents the current and voltage from being too high and overheating, and further protects the battery, and has the advantages of high reliability and high safety.

[0028] The voltage acquisition module 100 comprises Figures 2 to 4 As shown, the voltage acquisition module 100 is connected with a plurality of voltage acquisition subunits 110; the voltage acquisition subunit 110 is connected with the AFE chip U17; the voltage acquisition subunits 110 are connected in parallel; the voltage acquisition subunit 110 comprises the resistance RB16, the resistance R18, the resistance R234, the resistance R238, the resistance R243, the capacitor C70, the diode D19, the diode D62, the voltage stabilizing diode D49 and the triode Q58; one end of the resistance R18 is connected with one end of the resistance R234 and the positive electrode of the diode D19, and is connected with the port CELL16; the other end of the resistance R234 is connected with one end of the capacitor C70, the negative electrode of the voltage stabilizing diode D62 and the AFE chip U17; the negative electrode of the diode D19 is connected with one end of the resistance RB16, and the other end of the resistance RB16 is connected with the collector of the triode Q58; the base of the triode Q58 is connected with one end of the resistance R238 and the negative electrode of the diode D62; the other end of the resistance R18 is connected with the emitter of the triode Q58, the positive electrode of the diode D62 and one end of the resistance R243; the other end of the resistance R238 is connected with the other end of the capacitor C70, the positive electrode of the voltage stabilizing diode D49, the other end of the resistance R243 and the AFE chip U17. The voltage acquisition module 100 collects the voltage information of the battery, and transmits the voltage information of the battery to the MCU chip U14 through the AFE chip U17, the MCU chip U14 sends control information to the AFE chip U17 according to the voltage information, and the AFE chip U17 controls the on-off of the charge-discharge MOS module 600 according to the control information, prevents the voltage from being too high, and further protects the battery.

[0029] The charge-discharge MOS module 600 comprises Figures 5 to 7As shown, the charging and discharging MOS module 600 includes a resistor R10, a resistor R21, a resistor R31, a resistor R41, a resistor R148, a resistor R191, a resistor R457, a sampling resistor RS17, a diode D5, a diode D32, a diode D380, a zener diode D45, a zener diode D57, a fuse FS1, a TVS tube TVS5, a TVS tube TVS14, a TVS tube TVS26, a TVS tube TVS34, a capacitor C10, a capacitor C13, a MOS tube M1 and a MOS tube M2; the charging and discharging MOS module 600 is connected with a plurality of charging and discharging MOS sub-units 610, the charging and discharging MOS sub-units 610 are connected in parallel; one end of the resistor R10 is connected with the negative electrode of the diode D32 and is connected with a port DSG; the other end of the resistor R10 is connected with the positive electrode of the diode D32, the negative electrode of the zener diode D45, one end of the resistor R31, one end of the TVS tube TVS34 and the charging and discharging MOS sub-unit 610; the other end of the resistor R31 is connected with one end of the resistor R148 and the gate of the MOS tube M1; the positive electrode of the zener diode D45 is connected with the other end of the TVS tube TVS34, the other end of the resistor R148, the source of the MOS tube M1 and the charging and discharging MOS sub-unit 610 and is connected with a port D_A; the drain of the MOS tube M1 is connected with the drain of the MOS tube M2, the positive electrode of the diode D380, the positive electrode of the diode D5 and the charging and discharging MOS sub-unit 610; the negative electrode of the diode D380 is connected with the negative electrode of the diode D5, one end of the sampling resistor RS17 and one end of the fuse FS1; the other end of the sampling resistor RS17 is connected with the other end of the fuse FS1, one end of the resistor R457, one end of the TVS tube TVS5, one end of the TVS tube TVS14 and one end of the capacitor C10 and is connected with a port B+; the gate of the MOS tube M2 is connected with one end of the resistor R41 and one end of the resistor R191; the other end of the resistor R41 is connected with one end of the TVS tube TVS26, the negative electrode of the zener diode D57 and the charging and discharging MOS sub-unit 610 and is connected with a port CHG; the source of the MOS tube M2 is connected with the other end of the resistor R191, the other end of the TVS tube TVS26, the positive electrode of the zener diode D57, one end of the resistor R21, the other end of the TVS tube TVS5, the other end of the TVS tube TVS14, one end of the capacitor C13 and the charging and discharging MOS sub-unit 610 and is connected with a port P-; the other end of the resistor R21 is connected with the other end of the resistor R457; the other end of the capacitor C13 is connected with the other end of the capacitor C10. The charging and discharging MOS module 600 is used for controlling the charging and discharging of the battery.

[0030] The charge-discharge MOS subunit 610 comprises a resistor R42, a resistor R79, a resistor R149, a resistor R231, a MOS tube M3 and a MOS tube M4; one end of the resistor R79 is connected with the charge-discharge MOS module 600; the other end of the resistor R79 is connected with one end of the resistor R149 and the gate of the MOS tube M3; the other end of the resistor R149 is connected with the source of the MOS tube M3 and the charge-discharge MOS module 600; the drain of the MOS tube M3 is connected with the drain of the MOS tube M4 and the charge-discharge MOS module 600; the gate of the MOS tube M4 is connected with one end of the resistor R231 and one end of the resistor R42; the other end of the resistor R231 is connected with the source of the MOS tube M4 and the charge-discharge MOS module 600; and the other end of the resistor R42 is connected with the charge-discharge MOS module 600.

[0031] The current collection module 200 is connected with a plurality of current collection subunits 210, and the current collection subunits 210 are connected in parallel. Figure 3 Figure 5 The current collection module 200 is connected with a plurality of current collection subunits 210, and the current collection subunits 210 are connected in parallel.The current collection module 200 comprises a capacitor C120, a capacitor C125, a capacitor C128, a resistor R378 and a resistor R379; the current collection subunit 210 comprises a sampling resistor RS1; one end of the capacitor C120 is connected with one end of the resistor R378, one end of the capacitor C125 and an AFE chip U17; the other end of the capacitor C125 is grounded; one end of the capacitor C120 is connected with one end of the resistor R379, one end of the capacitor C128 and the AFE chip U17; the other end of the capacitor C128 is grounded; one end of the resistor R378 is connected with one end of the sampling resistor RS1; and the other end of the resistor R378 is connected with the other end of the sampling resistor RS1. The current collection module 200 collects the current during the charging and discharging of the battery through the plurality of current collection subunits 210.

[0032] The charging current detection module 400 is connected with a plurality of charging current detection subunits 410, and the charging current detection subunits 410 are connected in parallel. Figure 9As shown, the charging current detection module 400 includes resistors R357, R358, R365, R366, R371, R372, R376, R384, R385, R388, R389, capacitors C17, C20, C173, C175, C176, C177, C178, C179, C180, C171 and chip U24; one end of the resistor R357 is connected to one end of the capacitor C17 and one end of the resistor R366 and is connected with the port DA-CHG-CC; the other end of the capacitor C17 is grounded; the other end of the resistor R366 is grounded; the other end of the resistor R357 is connected to one end of the resistor R358, one end of the capacitor C174 and the V10 pin of the chip U24; the other end of the resistor R358 is connected to the other end of the capacitor C174, one end of the resistor R372, one end of the capacitor C178, one end of the capacitor C175 and the V1- pin of the chip U24; the other end of the resistor R372 is connected to the other end of the capacitor C178 and is connected with the port D_A; the other end of the capacitor C175 is connected to one end of the resistor R376, one end of the resistor R385, one end of the capacitor C176 and the V1+ pin of the chip U24; the other end of the resistor R376 is connected with the port BAT-; the other end of the resistor R385 is grounded; the other end of the capacitor C176 is connected to the VSS pin of the chip U24 and is grounded; one end of the capacitor C173 is connected to the VCC pin of the chip U24 and is connected with a 3.3V voltage source; the other end of the capacitor C173 is grounded; one end of the resistor R365 is connected to one end of the resistor R371, one end of the capacitor C177 and the V20 pin of the chip U24; the other end of the resistor R365 is connected to one end of the capacitor C20 and is connected with the port DA-CHG-CC1; the other end of the capacitor C20 is grounded; the other end of the resistor R371 is connected to the other end of the capacitor C177, one end of the resistor R389, one end of the capacitor C181, one end of the capacitor C179 and the V2- pin of the chip U24; the other end of the resistor R389 is connected to the other end of the capacitor C181 and the port D_A; the other end of the capacitor C179 is connected to one end of the resistor R388, one end of the resistor R384, one end of the capacitor C180 and the V2+ pin of the chip U24; the other end of the resistor R388 is connected with the port BAT-; the other end of the resistor R384 is grounded; the other end of the capacitor C180 is grounded.The charging current detection module 400 collects the current information of the charge-discharge MOS module 600 when discharging the battery according to the current collection module 200, and transmits the current information to the MCU chip U14; the MCU chip U14 sends control information to the AFE chip U17 according to the current information, and the AFE chip U17 controls the on-off of the charge-discharge MOS module 600 according to the control information, prevents the charging current from being too large, and further protects the battery.

[0033] The discharge current detection module 500 is as shown in the following table: Figure 10As shown, the discharge current detection module 500 includes resistors R225, R227, R236, R237, R245, R294, R392, R393, R397, R404, R405, capacitors C2, C30, C113, C136, C140, C164, C168, C182, C183, C184, C185 and chip U23; one end of the resistor R227 is connected to one end of the capacitor C136 and one end of the resistor R236, and is connected with the port DA-DSG-CC; the other end of the capacitor C136 is grounded; the other end of the resistor R236 is grounded; the other end of the resistor R227 is connected to one end of the resistor R225, one end of the capacitor C2 and the V10 pin of the chip U23; the other end of the resistor R225 is connected to the other end of the capacitor C2, one end of the resistor R237, one end of the capacitor C168, one end of the capacitor C113 and the V1- pin of the chip U23; the other end of the resistor R237 is connected to the other end of the capacitor C168 and the port BAT-; the other end of the capacitor C113 is connected to one end of the resistor R294, one end of the resistor R245, one end of the capacitor C164 and the V1+ pin of the chip U23; the other end of the resistor R294 is connected to the port D_A; the other end of the resistor R245 is grounded; the other end of the capacitor C164 is connected to the VSS pin of the chip U23 and grounded; one end of the capacitor C30 is connected to the VCC pin of the chip U23 and connected to a 3.3V voltage source; the other end of the capacitor C30 is grounded; one end of the resistor R392 is connected to one end of the resistor R393, one end of the capacitor C140 and the V20 pin of the chip U24; the other end of the resistor R365 is connected to one end of the capacitor C20 and is connected with the port DA-DSG-CC1; the other end of the capacitor C140 is grounded; the other end of the resistor R393 is connected to the other end of the capacitor C182, one end of the resistor R405, one end of the capacitor C185, one end of the capacitor C183 and the V2- pin of the chip U23; the other end of the resistor R405 is connected to the other end of the capacitor C185 and the port BAT-; the other end of the capacitor C183 is connected to one end of the resistor R404, one end of the resistor R397, one end of the capacitor C184 and the V2+ pin of the chip U23; the other end of the resistor R404 is connected to the port D_A; the other end of the resistor R397 is grounded; the other end of the capacitor C184 is grounded.The discharge current detection module 500 collects the current information of the charge-discharge MOS module 600 when discharging the battery according to the current collection module 200, and transmits the current information to the MCU chip U14; the MCU chip U14 sends control information to the AFE chip U17 according to the current information, and the AFE chip U17 controls the on-off of the charge-discharge MOS module 600 according to the control information, so as to prevent the discharge current from being too large, thereby protecting the battery.

[0034] The temperature collection module 300, as shown in Figure 8 The temperature collection module 300 includes a thermistor RT2, resistors R307, R308, R309 and a capacitor C148; one end of the thermistor RT2 is connected to one end of the resistor R308 and a 3.3V voltage source; the other end of the thermistor RT2 is connected to the other end of the resistor R308, one end of the resistor R307, one end of the resistor R309 and one end of the capacitor C148; the other end of the resistor R307 is grounded; the other end of the capacitor C148 is grounded; the other end of the resistor R309 is connected to a port MOS-NTC. The temperature collection module 300 collects the temperature information of the charge-discharge MOS module 600 and transmits the temperature information to the MCU chip U14; the MCU chip U14 sends control information to the AFE chip U17 according to the temperature information, and the AFE chip U17 controls the on-off of the charge-discharge MOS module 600 according to the control information, so as to prevent the battery from overheating, thereby protecting the battery.

[0035] In addition, the utility model still is equipped with the power module as Figure 11 B+ power supply input 48V voltage, is given MCU-LDO power supply through linear power stabilization 12V, is used for reducing the battery voltage to 12V and supplies power to the utility model, the utility model still is equipped with the host computer communication module as Figure 12 For realizing the communication between the MCU chip U14 and the host computer, it is convenient to obtain the battery information.

[0036] Working principle: the voltage acquisition module 100 of the utility model collects the voltage information of battery, and transmits the voltage information of battery to MCU chip U14 through AFE chip U17;Temperature acquisition module 300 collects the temperature information of charge-discharge MOS module 600, and transmits the temperature information to MCU chip U14;Charging current detection module 400 and discharging current detection module 500 according to current acquisition module 200 collect the current information of charge-discharge MOS module 600 when charging battery, and transmit the current information to MCU chip U14;MCU chip U14 sends control information according to voltage, temperature and current information to AFE chip U17, and AFE chip U17 controls the on-off of charge-discharge MOS module 600 according to control information, prevents current, voltage and overheating, and further protects battery, with the advantages of strong reliability, high safety.

[0037] The above embodiment only expresses the embodiment of the utility model, and the description is more specific and detailed, but it can not be understood as the limitation of the utility model patent range, and in the embodiment, up, down, left, right, front, back only represent its relative position and not its absolute position.It should be pointed out that for ordinary skilled person in the art, without departing from the concept of the utility model, a number of modifications and improvements can be made, which belong to the protection scope of the utility model.Therefore, the protection scope of the utility model patent should be subject to the appended claims.

Claims

1. A battery management system for domestic balcony energy storage, connected to a battery, characterized in that: The application relates to a battery management system, which comprises an MCU chip U14, an AFE chip U17, a voltage acquisition module (100), a current acquisition module (200), a temperature acquisition module (300), a charging current detection module (400), a discharging current detection module (500) and a charging and discharging MOS module (600); the MCU chip U14 is connected with the AFE chip U17, the temperature acquisition module (300), the charging current detection module (400) and the discharging current detection module (500) respectively; the AFE chip U17 is connected with the voltage acquisition module (100), the current acquisition module (200) and the charging and discharging MOS module (600) respectively; the charging and discharging MOS module (600) and the voltage acquisition module (100) are connected with a battery respectively; the current acquisition module (200) is connected with the charging and discharging MOS module (600); the charging current detection module (400) and the discharging current detection module (500) are connected with the current acquisition module (200) respectively; the MCU chip U14 is an ST32 master control chip; The voltage acquisition module (100) is connected with a plurality of voltage acquisition subunits (110); the voltage acquisition subunits (110) are connected with the AFE chip U17 respectively; the voltage acquisition subunits (110) are connected in parallel; the voltage acquisition subunit (110) comprises a resistor RB16, a resistor R18, a resistor R234, a resistor R238, a resistor R243, a capacitor C70, a diode D19, a diode D62, a voltage stabilizing diode D49 and a triode Q58; one end of the resistor R18 is connected with one end of the resistor R234 and the positive electrode of the diode D19, and is connected with a port CELL16; the other end of the resistor R234 is connected with one end of the capacitor C70, the negative electrode of the voltage stabilizing diode D62 and the AFE chip U17; the negative electrode of the diode D19 is connected with one end of the resistor RB16, and the other end of the resistor RB16 is connected with the collector of the triode Q58; the base of the triode Q58 is connected with one end of the resistor R238 and the negative electrode of the diode D62; the other end of the resistor R18 is connected with the emitter of the triode Q58, the positive electrode of the diode D62 and one end of the resistor R243; the other end of the resistor R238 is connected with the other end of the capacitor C70, the positive electrode of the voltage stabilizing diode D49, the other end of the resistor R243 and the AFE chip U17; The charging and discharging MOS module (600) comprises a resistor R10, a resistor R21, a resistor R31, a resistor R41, a resistor R148, a resistor R191, a resistor R457, a sampling resistor RS17, a diode D5, a diode D32, a diode D380, a voltage stabilizing diode D45, a voltage stabilizing diode D57, a fuse FS1, a TVS tube TVS5, a TVS tube TVS14, a TVS tube TVS26, a TVS tube TVS34, a capacitor C10, a capacitor C13, a MOS tube M1 and a MOS tube M2; the charging and discharging MOS module (600) is connected with a plurality of charging and discharging MOS subunits (610), the charging and discharging MOS subunits (610) are connected in parallel; one end of the resistor R10 is connected with the negative electrode of the diode D32 and is connected with a port DSG; the other end of the resistor R10 is connected with the positive electrode of the diode D32, the negative electrode of the voltage stabilizing diode D45, one end of the resistor R31, one end of the TVS tube TVS34 and the charging and discharging MOS subunit (610); the other end of the resistor R31 is connected with one end of the resistor R148 and the gate of the MOS tube M1; the positive electrode of the voltage stabilizing diode D45 is connected with the other end of the TVS tube TVS34, the other end of the resistor R148, the source of the MOS tube M1 and the charging and discharging MOS subunit (610) and is connected with a port D_A; the drain of the MOS tube M1 is connected with the drain of the MOS tube M2, the positive electrode of the diode D380, the positive electrode of the diode D5 and the charging and discharging MOS subunit (610); the negative electrode of the diode D380 is connected with the negative electrode of the diode D5, one end of the sampling resistor RS17 and one end of the fuse FS1; the other end of the sampling resistor RS17 is connected with the other end of the fuse FS1, one end of the resistor R457, one end of the TVS tube TVS5, one end of the TVS tube TVS14 and one end of the capacitor C10 and is connected with a port B+; the gate of the MOS tube M2 is connected with one end of the resistor R41 and one end of the resistor R191; the other end of the resistor R41 is connected with one end of the TVS tube TVS26, the negative electrode of the voltage stabilizing diode D57 and the charging and discharging MOS subunit (610) and is connected with a port CHG; the source of the MOS tube M2 is connected with the other end of the resistor R191, the other end of the TVS tube TVS26, the positive electrode of the voltage stabilizing diode D57, one end of the resistor R21, the other end of the TVS tube TVS5, the other end of the TVS tube TVS14, one end of the capacitor C13 and the charging and discharging MOS subunit (610) and is connected with a port P-; the other end of the resistor R21 is connected with the other end of the resistor R457; the other end of the capacitor C13 is connected with the other end of the capacitor C10; The charge-discharge MOS subunit (610) comprises a resistor R42, a resistor R79, a resistor R149, a resistor R231, a MOS tube M3 and a MOS tube M4; one end of the resistor R79 is connected with the charge-discharge MOS module (600); the other end of the resistor R79 is connected with one end of the resistor R149 and the gate of the MOS tube M3; the other end of the resistor R149 is connected with the source of the MOS tube M3 and the charge-discharge MOS module (600); the drain of the MOS tube M3 is connected with the drain of the MOS tube M4 and the charge-discharge MOS module (600); one end of the gate of the MOS tube M4 is connected with one end of the resistor R231 and one end of the resistor R42; the other end of the resistor R231 is connected with the source of the MOS tube M4 and the charge-discharge MOS module (600); the other end of the resistor R42 is connected with the charge-discharge MOS module (600); The current collection module (200) is connected with a plurality of current collection subunits (210), and the current collection subunits (210) are connected in parallel; the current collection module (200) comprises a capacitor C120, a capacitor C125, a capacitor C128, a resistor R378 and a resistor R379; the current collection subunit (210) comprises a sampling resistor RS1; one end of the capacitor C120 is connected with one end of the resistor R378, one end of the capacitor C125 and an AFE chip U17; the other end of the capacitor C125 is grounded; one end of the capacitor C120 is connected with one end of the resistor R379, one end of the capacitor C128 and the AFE chip U17; the other end of the capacitor C128 is grounded; one end of the resistor R378 is connected with one end of the sampling resistor RS1; the other end of the resistor R378 is connected with the other end of the sampling resistor RS1; The charging current detection module (400) comprises resistors R357, R358, R365, R366, R371, R372, R376, R384, R385, R388, R389, capacitors C17, C20, C173, C175, C176, C177, C178, C179, C180, C171 and a chip U24; one end of the resistor R357 is connected to one end of the capacitor C17 and one end of the resistor R366 and is provided with a port DA-CHG-CC; the other end of the capacitor C17 is grounded; the other end of the resistor R366 is grounded; the other end of the resistor R357 is connected to one end of the resistor R358, one end of the capacitor C174 and a V10 pin of the chip U24; the other end of the resistor R358 is connected to the other end of the capacitor C174, one end of the resistor R372, one end of the capacitor C178, one end of the capacitor C175 and a V1- pin of the chip U24; the other end of the resistor R372 is connected to the other end of the capacitor C178 and is provided with a port D_A; the other end of the capacitor C175 is connected to one end of the resistor R376, one end of the resistor R385, one end of the capacitor C176 and a V1+ pin of the chip U24; the other end of the resistor R376 is provided with a port BAT-; the other end of the resistor R385 is grounded; the other end of the capacitor C176 is connected to a VSS pin of the chip U24 and is grounded; one end of the capacitor C173 is connected to a VCC pin of the chip U24 and is connected to a 3.3V voltage source; the other end of the capacitor C173 is grounded; one end of the resistor R365 is connected to one end of the resistor R371, one end of the capacitor C177 and a V20 pin of the chip U24; the other end of the resistor R365 is connected to one end of the capacitor C20 and is provided with a port DA-CHG-CC1; the other end of the capacitor C20 is grounded; the other end of the resistor R371 is connected to the other end of the capacitor C177, one end of the resistor R389, one end of the capacitor C181, one end of the capacitor C179 and a V2- pin of the chip U24; the other end of the resistor R389 is connected to the other end of the capacitor C181 and a port D_A; the other end of the capacitor C179 is connected to one end of the resistor R388, one end of the resistor R384, one end of the capacitor C180 and a V2+ pin of the chip U24; the other end of the resistor R388 is connected to a port BAT-; the other end of the resistor R384 is grounded; the other end of the capacitor C180 is grounded; The discharge current detection module (500) comprises a resistor R225, a resistor R227, a resistor R236, a resistor R237, a resistor R245, a resistor R294, a resistor R392, a resistor R393, a resistor R397, a resistor R404, a resistor R405, a capacitor C2, a capacitor C30, a capacitor C113, a capacitor C136, a capacitor C140, a capacitor C164, a capacitor C168, a capacitor C182, a capacitor C183, a capacitor C184, a capacitor C185 and a chip U23; one end of the resistor R227 is connected with one end of the capacitor C136 and one end of the resistor R236, and is connected with a port DA-DSG-CC; the other end of the capacitor C136 is grounded; the other end of the resistor R236 is grounded; the other end of the resistor R227 is connected with one end of the resistor R225, one end of the capacitor C2 and a V10 pin of the chip U23; the other end of the resistor R225 is connected with the other end of the capacitor C2, one end of the resistor R237, one end of the capacitor C168, one end of the capacitor C113 and a V1- pin of the chip U23; the other end of the resistor R237 is connected with the other end of the capacitor C168 and a port BAT-; the other end of the capacitor C113 is connected with one end of the resistor R294, one end of the resistor R245, one end of the capacitor C164 and a V1+ pin of the chip U23; the other end of the resistor R294 is connected with a port D_A; the other end of the resistor R245 is grounded; the other end of the capacitor C164 is connected with a VSS pin of the chip U23 and grounded; one end of the capacitor C30 is connected with a VCC pin of the chip U23 and connected with a 3.3V voltage source; the other end of the capacitor C30 is grounded; one end of the resistor R392 is connected with one end of the resistor R393, one end of the capacitor C140 and a V20 pin of the chip U24; the other end of the resistor R365 is connected with one end of the capacitor C20 and connected with a port DA-DSG-CC1; the other end of the capacitor C140 is grounded; the other end of the resistor R393 is connected with the other end of the capacitor C182, one end of the resistor R405, one end of the capacitor C185, one end of the capacitor C183 and a V2- pin of the chip U23; the other end of the resistor R405 is connected with the other end of the capacitor C185 and a port BAT-; the other end of the capacitor C183 is connected with one end of the resistor R404, one end of the resistor R397, one end of the capacitor C184 and a V2+ pin of the chip U23; the other end of the resistor R404 is connected with a port D_A; the other end of the resistor R397 is grounded; and the other end of the capacitor C184 is grounded. The temperature acquisition module (300) comprises a thermistor RT2, a resistor R307, a resistor R308, a resistor R309 and a capacitor C148; one end of the thermistor RT2 is connected with one end of the resistor R308 and a 3.3V voltage source; the other end of the thermistor RT2 is connected with the other end of the resistor R308, one end of the resistor R307, one end of the resistor R309 and one end of the capacitor C148; the other end of the resistor R307 is grounded; the other end of the capacitor C148 is grounded; and the other end of the resistor R309 is connected with a port MOS-NTC.

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