CN210577836U - Charge-discharge battery module with parallel current sharing and monitoring functions - Google Patents
Charge-discharge battery module with parallel current sharing and monitoring functions Download PDFInfo
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- CN210577836U CN210577836U CN201921181113.0U CN201921181113U CN210577836U CN 210577836 U CN210577836 U CN 210577836U CN 201921181113 U CN201921181113 U CN 201921181113U CN 210577836 U CN210577836 U CN 210577836U
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Abstract
A charge-discharge battery module with parallel current sharing and monitoring functions comprises a shell, a battery pack and a circuit board, wherein the battery pack and the circuit board are arranged inside the shell, an external interface is arranged on the shell, the circuit board comprises a microprocessor and a buck-boost circuit, the external interface comprises a USB TYPE-C interface and a communication interface, the USB TYPE-C interface is connected with the microprocessor through a USB-PD protocol chip, the communication interface comprises a CAN-BUS data transmission port, a CAN-BUS parallel current sharing port and a high-power output interface, the battery pack is respectively connected with the USB TYPE-C interface and the high-power output interface after sequentially passing through the buck-boost circuit and the charge-discharge port switching unit, and the microprocessor is connected with the buck-boost circuit, the charge-discharge port switching unit, the USB-PD protocol chip, the CAN-BUS data transmission port and the CAN-BUS parallel current. The design not only has the parallel current sharing function and the monitoring function, but also has high working efficiency.
Description
Technical Field
The utility model relates to a battery technology field especially relates to a take parallelly connected charge-discharge battery module who flow equalizes and monitor function.
Background
Due to the limitation of objective factors such as volume weight or installation position, in a comprehensive application system involving a plurality of batteries, the series-parallel charging and discharging of the plurality of batteries is inevitable, and because the capacity of a single battery is limited, the series-parallel connection of a plurality of batteries is needed, and the capacity voltage of each battery is different, so that the multi-battery system is relatively complex.
Chinese patent, the utility model discloses a many parallelly connected discharge device of battery and system of authorizing the announcement number as CN208257438U, and the announcement date of authorizing is 2018 12 months 18 days, including a plurality of parallelly connected battery module, battery module includes: a battery for powering the discharge module; a charge permission unit connected to the battery; a discharge allowing unit connected to the charge allowing unit; and a controller connected to the discharge allowing unit and the charge allowing unit, the controller controlling the discharge allowing unit and the charge allowing unit to be turned on or off. Although the utility model discloses a controller control battery module internal switch's closure and disconnection make the circuit have higher controllability to improve the security of circuit, it still has following defect: firstly, the utility model cannot monitor the working state of the battery module in real time and control the output power of the battery module; secondly, when a plurality of battery modules are connected in parallel, the purpose of parallel current sharing cannot be achieved through the controller.
Disclosure of Invention
The utility model aims at overcoming the defect and the problem that do not possess parallelly connected flow equalizing and monitor function that exist among the prior art, providing a take parallelly connected flow equalizing and monitor function's charge-discharge battery module.
In order to achieve the above purpose, the technical solution of the utility model is that: a charge-discharge battery module with parallel current sharing and monitoring functions comprises a shell, a battery pack and a circuit board, wherein the battery pack and the circuit board are arranged in the shell;
the circuit board comprises a microprocessor and a lifting voltage circuit, the external interface comprises a charging and discharging USB interface and a communication interface, the communication interface comprises a CAN-BUS data transmission port and a CAN-BUS parallel current sharing port, the battery pack is connected with the charging and discharging USB interface after sequentially passing through the lifting voltage circuit and a charging and discharging port switching unit, and the microprocessor is respectively connected with the lifting voltage circuit, the charging and discharging port switching unit, the CAN-BUS data transmission port and the CAN-BUS parallel current sharing port;
the CAN-BUS data transmission port is used for transmitting the working state of the charging and discharging battery module;
the CAN-BUS parallel flow equalizing port is used for assembling a plurality of charging and discharging battery modules in parallel and exchanging input and output information of the charging and discharging battery modules mutually.
The charging and discharging USB interface is a USB TYPE-C interface, and the USB TYPE-C interface is connected with the microprocessor through a USB-PD protocol chip.
The communication interface further comprises a high-power output interface, and the high-power output interface is connected with the buck-boost circuit through a charging and discharging port switching unit.
The battery pack is formed by combining 8 batteries in a 4-string and 2-parallel mode.
The circuit board also comprises a battery voltage detection unit, a battery balance control unit and a battery temperature detection unit;
the battery voltage detection unit is connected with the microprocessor, and the microprocessor receives the detection result of the voltage of the single battery output by the battery voltage detection unit and controls whether the boost-buck circuit works or not according to the detection result of the voltage of the single battery;
the battery equalization control unit is connected with the battery voltage detection unit, the battery voltage detection unit controls the battery equalization control unit to be turned on and turned off, the battery equalization control unit comprises a plurality of discharging resistors connected with the battery in parallel, and the battery equalization control unit controls the charging speed of the battery through the discharging resistors;
the battery temperature detection unit is connected with the microprocessor, and the microprocessor receives a battery temperature detection result output by the battery temperature detection unit and controls the charging and discharging current of the boost-buck circuit according to the battery temperature detection result.
Each battery of the battery pack is pasted with a thermistor, and the thermistor is connected with a battery temperature detection unit.
The circuit board still includes a voltage acquisition unit, No. two voltage acquisition units, current detection unit, the group battery is connected with the charge-discharge USB interface through a voltage acquisition unit, the lift voltage circuit in proper order, current detection unit, No. two voltage acquisition units, charge-discharge mouth switching unit back, a voltage acquisition unit, No. two voltage acquisition units, current detection unit is connected with microprocessor respectively, microprocessor controls whether the lift voltage circuit works through a voltage acquisition unit, the input and output voltage that No. two voltage acquisition units gathered, microprocessor controls whether the lift voltage circuit works through the input and output current that current detection unit gathered.
The shell comprises a shell head, a shell body and a shell tail, wherein two ends of the shell body are respectively connected with the shell head and the shell tail, the battery pack and the circuit board are arranged in the shell body, and the charging and discharging USB interface and the communication interface are arranged on the shell head.
The charging and discharging battery module further comprises an LED status indicator lamp, the LED status indicator lamp is arranged on the shell head and connected with the microprocessor, and the LED status indicator lamp is used for displaying the residual electric quantity of the battery pack.
The shell body is made of aluminum alloy.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model relates to a circuit board in charge-discharge battery module with parallel flow equalization and monitoring functions, which comprises a microprocessor and a buck-boost circuit, wherein a communication interface comprises a CAN-BUS data transmission port and a CAN-BUS parallel flow equalization port, a battery pack is connected with a charge-discharge USB interface after sequentially passing through the buck-boost circuit and a charge-discharge port switching unit, and the microprocessor is respectively connected with the buck-boost circuit, the charge-discharge port switching unit, the CAN-BUS data transmission port and the CAN-BUS parallel flow equalization port; the design CAN acquire the working state of the charge-discharge battery module through the CAN-BUS data transmission port, and control the output power of the charge-discharge battery module; through the CAN-BUS parallel flow equalizing port, a plurality of charging and discharging battery modules CAN be assembled in parallel, and during parallel assembly, the microprocessors in each charging and discharging battery module exchange input and output information mutually to adjust input and output of the microprocessor and achieve the purpose of parallel flow equalization. Therefore, the utility model discloses possess parallelly connected function and the monitor function of flow equalizing.
2. The utility model relates to a charge-discharge USB interface in the charge-discharge battery module with parallel flow equalization and monitoring functions is a USB TYPE-C interface, the USB TYPE-C interface is connected with a microprocessor through a USB-PD protocol chip, and the USB TYPE-C interface supports PD quick charge/discharge; the high-power output interface is connected with the buck-boost circuit through the charge-discharge port switching unit, so that the charge-discharge battery module has a high-power output function. Therefore, the utility model discloses work efficiency is high.
3. The utility model relates to a take parallelly connected charge-discharge battery module of flow equalizing and monitoring function in circuit board still includes battery voltage detecting element, battery equalization control unit, battery temperature detecting element, and battery voltage detecting element monitors battery voltage, when taking place to overcharge or put excessively, closes the lift voltage circuit, extension battery life; the battery voltage detection unit controls the battery equalization control unit to be turned on and off, so that uniform loss among batteries is realized, and the service life of the batteries is prolonged; the battery temperature detection unit monitors the temperature of the battery, and the voltage rising and falling circuit can be closed to protect the battery when the temperature is too high; each battery of the battery pack is pasted with a thermistor, and the thermistor is connected with the battery temperature detection unit, so that the reliability of temperature monitoring is improved. Therefore, the utility model discloses long service life, reliability are high.
4. The utility model relates to a group battery is in proper order through a voltage acquisition unit among the parallelly connected charge-discharge battery module of flow equalizing and monitoring function in area, the lift voltage circuit, the current detection unit, No. two voltage acquisition units, be connected with the charge-discharge USB interface behind the charge-discharge mouth switching unit, microprocessor is through a voltage acquisition unit, whether the input/output voltage of No. two voltage acquisition unit collections controls the lift voltage circuit and works, whether microprocessor controls the lift voltage circuit through the input/output current that current detection unit gathered and works, the fine protection of above-mentioned design charge-discharge battery module, the life of charge-discharge battery module has been improved. Therefore, the utility model provides high charge-discharge battery module's life.
5. The utility model relates to a shell includes shell head, shell body, shell tail in the charging and discharging battery module of area parallel connection flow equalizing and monitoring function, and the both ends of shell body are connected with shell head, shell tail respectively for the assembly of charging and discharging battery module is simple and convenient; the LED state indicator lamp is arranged on the shell head and used for displaying the residual electric quantity of the battery pack, so that the use of the charging and discharging battery module is facilitated; the shell body is made of aluminum alloy, so that the heat dissipation of the battery is enhanced. Therefore, the utility model discloses the assembly is simple and convenient, convenient to use, radiating effect are good.
Drawings
Fig. 1 is a self-contained drawing of the present invention.
Fig. 2 is an exploded view of the present invention.
Fig. 3 is a schematic structural diagram of the circuit board in fig. 2.
In the figure: the device comprises a shell 1, a shell head 11, a shell body 12, a shell tail 13, a battery pack 2, a circuit board 3, a microprocessor 31, a voltage boosting and reducing circuit 32, a charging and discharging port switching unit 33, a USB-PD protocol chip 34, a battery voltage detection unit 35, a battery equalization control unit 36, a battery temperature detection unit 37, a first voltage acquisition unit 38, a second voltage acquisition unit 39, a current detection unit 310, a charging and discharging USB interface 4, a communication interface 5, a CAN-BUS data transmission port 51, a CAN-BUS parallel current-sharing port 52, a high-power output interface 53 and an LED state indicator lamp 6.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 3, a charge-discharge battery module with parallel current sharing and monitoring functions comprises a housing 1, a battery pack 2 and a circuit board 3, wherein the battery pack 2 and the circuit board 3 are arranged in the housing, and the housing 1 is provided with an external interface;
the circuit board 3 comprises a microprocessor 31 and a buck-boost circuit 32, the external interface comprises a charge-discharge USB interface 4 and a communication interface 5, the communication interface 5 comprises a CAN-BUS data transmission port 51 and a CAN-BUS parallel current equalizing port 52, the battery pack 2 is connected with the charge-discharge USB interface 4 after sequentially passing through the buck-boost circuit 32 and a charge-discharge port switching unit 33, and the microprocessor 31 is respectively connected with the buck-boost circuit 32, the charge-discharge port switching unit 33, the CAN-BUS data transmission port 51 and the CAN-BUS parallel current equalizing port 52;
the CAN-BUS data transmission port 51 is used for transmitting the working state of the charging and discharging battery module;
the CAN-BUS parallel flow equalizing port 52 is used for assembling a plurality of charging and discharging battery modules in parallel and exchanging input and output information of the charging and discharging battery modules mutually.
The charging and discharging USB interface 4 is a USB TYPE-C interface, and the USB TYPE-C interface is connected with the microprocessor 31 through the USB-PD protocol chip 34.
The communication interface 5 further includes a high-power output interface 53, and the high-power output interface 53 is connected to the buck-boost circuit 32 through the charge/discharge port switching unit 33.
The battery pack 2 is formed by combining 8 batteries in a 4-string 2-parallel mode.
The circuit board 3 further comprises a battery voltage detection unit 35, a battery equalization control unit 36 and a battery temperature detection unit 37;
the battery voltage detection unit 35 is connected with the microprocessor 31, and the microprocessor 31 receives the detection result of the single battery voltage output by the battery voltage detection unit 35 and controls whether the voltage boosting and reducing circuit 32 works or not according to the detection result of the single battery voltage;
the battery equalization control unit 36 is connected with the battery voltage detection unit 35, the battery voltage detection unit 35 controls the battery equalization control unit 36 to be turned on and turned off, the battery equalization control unit 36 comprises a plurality of discharging resistors connected with the battery in parallel, and the battery equalization control unit 36 controls the charging speed of the battery through the discharging resistors;
the battery temperature detecting unit 37 is connected to the microprocessor 31, and the microprocessor 31 receives the battery temperature detection result output by the battery temperature detecting unit 37 and controls the charging and discharging current of the voltage step-up/step-down circuit 32 according to the battery temperature detection result.
Each battery of the battery pack 2 is attached with a thermistor, and the thermistor is connected with a battery temperature detection unit 37.
The circuit board 3 further comprises a voltage acquisition unit 38, a second voltage acquisition unit 39 and a current detection unit 310, the battery pack 2 is connected with the charging and discharging USB interface 4 after sequentially passing through the first voltage acquisition unit 38, the buck-boost circuit 32, the current detection unit 310, the second voltage acquisition unit 39 and the charging and discharging port switching unit 33, the first voltage acquisition unit 38, the second voltage acquisition unit 39 and the current detection unit 310 are respectively connected with the microprocessor 31, the microprocessor 31 controls whether the buck-boost circuit 32 works or not through input and output voltages acquired by the first voltage acquisition unit 38 and the second voltage acquisition unit 39, and the microprocessor 31 controls whether the buck-boost circuit 32 works or not through input and output currents acquired by the current detection unit 310.
The shell 1 comprises a shell head 11, a shell body 12 and a shell tail 13, two ends of the shell body 12 are respectively connected with the shell head 11 and the shell tail 13, the battery pack 2 and the circuit board 3 are both arranged in the shell body 12, and the charging and discharging USB interface 4 and the communication interface 5 are both arranged on the shell head 11.
The charging and discharging battery module further comprises an LED status indicator lamp 6, the LED status indicator lamp 6 is arranged on the shell head 11, the LED status indicator lamp 6 is connected with the microprocessor 31, and the LED status indicator lamp 6 is used for displaying the residual capacity of the battery pack 2.
The shell 12 is made of aluminum alloy.
The principle of the utility model is explained as follows:
the shell body is made of aluminum alloy, so that heat dissipation of the battery can be enhanced, and the battery is protected from explosion caused by overhigh temperature.
The battery pack is formed by combining 8 18650 batteries 4 in series and 2, and each battery body is pasted with a thermistor and connected with a battery temperature detection unit to provide battery temperature parameters for the microprocessor.
USB TYPE-C interface: and the charging and discharging USB interface of the USB-PD protocol is supported.
A high-power output interface: only supports 16.8V/8.3A high-power output; the high-power output interface only supports discharge and can maximally reach 140W output power.
CAN-BUS data transmission interface: and starting a high-power output function, and transmitting the working state of the battery module, such as: battery voltage, battery temperature, battery remaining capacity, output voltage, etc.; through the CAN bus, the upper computer CAN acquire the working state of each parallel battery module, and the upper computer CAN also control the output of the battery modules through the bus.
CAN-BUS parallel flow equalizing port: in some applications requiring large current, a plurality of battery modules CAN be assembled in parallel through the CAN BUS, the output information of the battery modules is exchanged through the CAN-BUS parallel current equalizing ports, then the output of the battery modules is adjusted, the output balance of each battery module is achieved, and the stability and reliability of the system are ensured.
Step-up and step-down circuit: the wide-range DC-DC conversion can support 5-20V to 15V (the value can be different when the battery cell is different) or 15V to 5-20V; the voltage and current input and output by the buck-boost circuit can be set and adjusted through a microprocessor, and the conversion efficiency can reach more than 95%.
Battery voltage detection unit: and the voltage of the battery is monitored, and the voltage lifting circuit is closed when overcharge or overdischarge is about to occur, so that the service life of the battery is prolonged.
A battery equalization control unit: after the battery is used for a long time, capacity loss occurs, and the battery with high loss is fully charged before the battery with low loss; when the batteries are fully charged, the charging is disconnected to prevent overcharging, so that the batteries cannot be fully charged with low loss.
Battery temperature detection unit: the temperature of the battery is monitored, and the voltage boosting and reducing circuit can be closed to protect the battery when the temperature is too high.
USB-PD protocol conversion chip: the USB-DP protocol is converted into IIC protocol to communicate with the microprocessor.
The microprocessor: and the programmable device controls the work of each unit.
When charging the battery: when the charger is inserted into the USB TYPE-C interface, the USB-PD protocol chip obtains the currently inserted maximum voltage and maximum current which are used as power supply equipment and can be supplied through a PD protocol, and informs the microprocessor to prepare to enter a charging state; the microprocessor controls the charging and discharging port switching unit to be switched to a USB TYPE-C interface for input, and then feeds back the input to the USB-PD protocol chip to finish preparation, and the charging can be carried out by maximum voltage and current; then the microprocessor controls the voltage boosting and reducing circuit to adjust the voltage for charging the battery, and the charging voltage is monitored in real time through the voltage acquisition unit; during charging, the input voltage can support the input of various specifications of voltages of 5V, 9V, 12V and 20V, the current supports the maximum 3A, and the input power is 60W at the maximum.
When external power is supplied: when the powered device is inserted into the USB TYPE-C interface, the USB-PD protocol chip obtains the voltage and the current which are currently inserted into the powered device and requested by the device through the PD protocol, and informs the microprocessor to prepare to enter a power supply state; the microprocessor controls the voltage boosting and reducing circuit according to the difference value between the voltage requested by the equipment and the voltage acquired by the voltage acquisition unit, so that the voltage acquired by the voltage acquisition unit meets the requirements of the powered equipment, and then the microprocessor feeds back the voltage to the USB-PD protocol chip for preparing output and switching the charge-discharge port switching unit to the USB TYPE-C interface; when power is supplied, the current detection unit monitors the power supply current in real time so that the power supply current does not exceed the request current of the powered device; when the USB TYPE-C interface discharges, the USB TYPE-C interface can support various voltage outputs of 5V, 9V, 12V and 20V, the maximum output current is 3A, and the maximum output power is 60W. When the powered device is inserted into the high-power output interface, the microprocessor is informed to start the output of the high-power interface through a CAN-BUS data transmission port of the high-power output interface, and the microprocessor adjusts the output voltage to a preset value and then switches the output voltage to the high-power output interface through the charging and discharging port switching unit; the preset value of the output voltage of the high-power output interface is 16.8V, the maximum output current is 8.3A, the rated output power is 100W, and the maximum output power is 140W.
Example 1:
referring to fig. 1 to 3, a charge-discharge battery module with parallel current sharing and monitoring functions comprises a housing 1, a battery pack 2 and a circuit board 3, wherein the battery pack 2 and the circuit board 3 are arranged in the housing, and the housing 1 is provided with an external interface; the circuit board 3 comprises a microprocessor 31 and a buck-boost circuit 32, the external interface comprises a charge-discharge USB interface 4 and a communication interface 5, the communication interface 5 comprises a CAN-BUS data transmission port 51 and a CAN-BUS parallel current equalizing port 52, the battery pack 2 is connected with the charge-discharge USB interface 4 after sequentially passing through the buck-boost circuit 32 and a charge-discharge port switching unit 33, and the microprocessor 31 is respectively connected with the buck-boost circuit 32, the charge-discharge port switching unit 33, the CAN-BUS data transmission port 51 and the CAN-BUS parallel current equalizing port 52; the CAN-BUS data transmission port 51 is used for transmitting the working state of the charging and discharging battery module; the CAN-BUS parallel flow equalizing port 52 is used for assembling a plurality of charge and discharge battery modules in parallel and exchanging input and output information of the charge and discharge battery modules with each other.
Example 2:
the basic contents are the same as example 1, except that:
referring to fig. 1 to 3, the charging and discharging USB interface 4 is a USB TYPE-C interface, and the USB TYPE-C interface is connected to the microprocessor 31 through a USB-PD protocol chip 34; the communication interface 5 further includes a high-power output interface 53, and the high-power output interface 53 is connected to the buck-boost circuit 32 through the charge/discharge port switching unit 33.
Example 3:
the basic contents are the same as example 1, except that:
referring to fig. 1 to 3, the battery pack 2 is formed by combining 8 batteries in a parallel manner with 4 strings 2; the circuit board 3 further comprises a battery voltage detection unit 35, a battery equalization control unit 36 and a battery temperature detection unit 37; the battery voltage detection unit 35 is connected with the microprocessor 31, and the microprocessor 31 receives the detection result of the single battery voltage output by the battery voltage detection unit 35 and controls whether the voltage boosting and reducing circuit 32 works or not according to the detection result of the single battery voltage; the battery equalization control unit 36 is connected with the battery voltage detection unit 35, the battery voltage detection unit 35 controls the battery equalization control unit 36 to be turned on and turned off, the battery equalization control unit 36 comprises a plurality of discharging resistors connected with the battery in parallel, and the battery equalization control unit 36 controls the charging speed of the battery through the discharging resistors; the battery temperature detection unit 37 is connected with the microprocessor 31, and the microprocessor 31 receives the battery temperature detection result output by the battery temperature detection unit 37 and controls the charging and discharging current of the voltage boosting and reducing circuit 32 according to the battery temperature detection result; each battery of the battery pack 2 is attached with a thermistor, and the thermistor is connected with a battery temperature detection unit 37.
Example 4:
the basic contents are the same as example 4, except that:
referring to fig. 1 to 3, the circuit board 3 further includes a first voltage collecting unit 38, a second voltage collecting unit 39, and a current detecting unit 310, the battery pack 2 is connected to the charging and discharging USB interface 4 through the first voltage collecting unit 38, the buck-boost circuit 32, the current detecting unit 310, the second voltage collecting unit 39, and the charging and discharging port switching unit 33 in sequence, the first voltage collecting unit 38, the second voltage collecting unit 39, and the current detecting unit 310 are respectively connected to the microprocessor 31, the microprocessor 31 controls whether the buck-boost circuit 32 operates through the input and output voltages collected by the first voltage collecting unit 38 and the second voltage collecting unit 39, and the microprocessor 31 controls whether the buck-boost circuit 32 operates through the input and output currents collected by the current detecting unit 310.
Example 5:
the basic contents are the same as example 1, except that:
referring to fig. 1 to 3, the housing 1 includes a housing head 11, a housing body 12, and a housing tail 13, two ends of the housing body 12 are respectively connected to the housing head 11 and the housing tail 13, the battery pack 2 and the circuit board 3 are both disposed in the housing body 12, and the charging/discharging USB interface 4 and the communication interface 5 are both disposed on the housing head 11; the charging and discharging battery module further comprises an LED status indicator lamp 6, the LED status indicator lamp 6 is arranged on the shell head 11, the LED status indicator lamp 6 is connected with the microprocessor 31, and the LED status indicator lamp 6 is used for displaying the residual electric quantity of the battery pack 2; the shell 12 is made of aluminum alloy.
Claims (10)
1. The utility model provides a take parallelly connected charge-discharge battery module who flow equalizes and monitor function, includes group battery (2), circuit board (3) of shell (1) and inside setting thereof, group battery (2) are connected with circuit board (3), be provided with external interface, its characterized in that on shell (1):
the circuit board (3) comprises a microprocessor (31) and a boost-buck circuit (32), the external interface comprises a charge-discharge USB interface (4) and a communication interface (5), the communication interface (5) comprises a CAN-BUS data transmission port (51) and a CAN-BUS parallel current-sharing port (52), the battery pack (2) is connected with the charge-discharge USB interface (4) after sequentially passing through the boost-buck circuit (32) and a charge-discharge port switching unit (33), and the microprocessor (31) is respectively connected with the boost-buck circuit (32), the charge-discharge port switching unit (33), the CAN-BUS data transmission port (51) and the CAN-BUS parallel current-sharing port (52);
the CAN-BUS data transmission port (51) is used for transmitting the working state of the charging and discharging battery module;
the CAN-BUS parallel flow equalizing port (52) is used for assembling a plurality of charging and discharging battery modules in parallel and exchanging input and output information of the charging and discharging battery modules mutually.
2. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 1, wherein: the charging and discharging USB interface (4) is a USB TYPE-C interface, and the USB TYPE-C interface is connected with the microprocessor (31) through a USB-PD protocol chip (34).
3. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 2, wherein: the communication interface (5) further comprises a high-power output interface (53), and the high-power output interface (53) is connected with the boost-buck circuit (32) through a charging-discharging port switching unit (33).
4. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 1, wherein: the battery pack (2) is formed by combining 8 batteries in a 4-string and 2-parallel mode.
5. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 4, wherein:
the circuit board (3) further comprises a battery voltage detection unit (35), a battery balance control unit (36) and a battery temperature detection unit (37);
the battery voltage detection unit (35) is connected with the microprocessor (31), and the microprocessor (31) receives the single battery voltage detection result output by the battery voltage detection unit (35) and controls whether the boost-buck circuit (32) works or not according to the single battery voltage detection result;
the battery equalization control unit (36) is connected with the battery voltage detection unit (35), the battery voltage detection unit (35) controls the battery equalization control unit (36) to be turned on and turned off, the battery equalization control unit (36) comprises a plurality of discharging resistors which are connected with the batteries in parallel, and the battery equalization control unit (36) controls the charging speed of the batteries through the discharging resistors;
the battery temperature detection unit (37) is connected with the microprocessor (31), and the microprocessor (31) receives a battery temperature detection result output by the battery temperature detection unit (37) and controls the charging and discharging current of the boost-buck circuit (32) according to the battery temperature detection result.
6. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 5, wherein: each battery of the battery pack (2) is pasted with a thermistor, and the thermistor is connected with a battery temperature detection unit (37).
7. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 1, wherein: the circuit board (3) also comprises a first voltage acquisition unit (38), a second voltage acquisition unit (39) and a current detection unit (310), the battery pack (2) is connected with the charging and discharging USB interface (4) after passing through the first voltage acquisition unit (38), the voltage boosting and reducing circuit (32), the current detection unit (310), the second voltage acquisition unit (39) and the charging and discharging port switching unit (33) in sequence, the first voltage acquisition unit (38), the second voltage acquisition unit (39) and the current detection unit (310) are respectively connected with the microprocessor (31), the microprocessor (31) controls whether the voltage boosting and reducing circuit (32) works or not through input and output voltages acquired by the first voltage acquisition unit (38) and the second voltage acquisition unit (39), and the microprocessor (31) controls whether the voltage boosting and reducing circuit (32) works or not through input and output currents acquired by the current detection unit (310).
8. The charge-discharge battery module with the parallel current sharing and monitoring functions as claimed in claim 1, wherein: the shell (1) comprises a shell head (11), a shell body (12) and a shell tail (13), wherein the two ends of the shell body (12) are respectively connected with the shell head (11) and the shell tail (13), the battery pack (2) and the circuit board (3) are arranged in the shell body (12), and the charging and discharging USB interface (4) and the communication interface (5) are arranged on the shell head (11).
9. The charge-discharge battery module with the parallel current sharing and monitoring functions of claim 8, wherein: the charging and discharging battery module further comprises an LED state indicator lamp (6), the LED state indicator lamp (6) is arranged on the shell head (11), the LED state indicator lamp (6) is connected with the microprocessor (31), and the LED state indicator lamp (6) is used for displaying the residual electric quantity of the battery pack (2).
10. The charge-discharge battery module with the parallel current sharing and monitoring functions of claim 8, wherein: the shell body (12) is made of aluminum alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921181113.0U CN210577836U (en) | 2019-07-25 | 2019-07-25 | Charge-discharge battery module with parallel current sharing and monitoring functions |
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| CN201921181113.0U CN210577836U (en) | 2019-07-25 | 2019-07-25 | Charge-discharge battery module with parallel current sharing and monitoring functions |
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| CN210577836U true CN210577836U (en) | 2020-05-19 |
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| CN201921181113.0U Expired - Fee Related CN210577836U (en) | 2019-07-25 | 2019-07-25 | Charge-discharge battery module with parallel current sharing and monitoring functions |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859552A (en) * | 2021-09-27 | 2021-12-31 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
| CN113921922A (en) * | 2021-10-11 | 2022-01-11 | 苏州联胜新能源科技有限公司 | Battery pack parallel management method, using method and management system, sub-packaging subsystem and energy storage system, and electric vehicle |
-
2019
- 2019-07-25 CN CN201921181113.0U patent/CN210577836U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113859552A (en) * | 2021-09-27 | 2021-12-31 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
| CN113859552B (en) * | 2021-09-27 | 2023-10-24 | 深圳市道通智能航空技术股份有限公司 | Battery management system |
| CN113921922A (en) * | 2021-10-11 | 2022-01-11 | 苏州联胜新能源科技有限公司 | Battery pack parallel management method, using method and management system, sub-packaging subsystem and energy storage system, and electric vehicle |
| CN113921922B (en) * | 2021-10-11 | 2022-06-28 | 苏州联胜新能源科技有限公司 | Battery pack parallel management method, using method and management system, sub-packaging subsystem and energy storage system, and electric vehicle |
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