CN209627036U - A kind of battery management system - Google Patents
A kind of battery management system Download PDFInfo
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- CN209627036U CN209627036U CN201920745248.9U CN201920745248U CN209627036U CN 209627036 U CN209627036 U CN 209627036U CN 201920745248 U CN201920745248 U CN 201920745248U CN 209627036 U CN209627036 U CN 209627036U
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Abstract
The utility model discloses a kind of battery management systems, belong to technical field of battery management, master is to solve the smaller technical problem without being able to satisfy super capacitor equilibrium of existing battery management system euqalizing current, the battery management system includes control chip, temperature sensor, communication chip, capacitor balancing chip, capacitance detecting chips, storage chip, the control chip is separately connected the temperature sensor, communication chip, capacitor balancing chip, capacitance detecting chips, storage chip, the communication ends of the capacitor balancing chip are correspondingly connected with the communication ends of the capacitance detecting chips, the input terminal of the capacitance detecting chips, the input terminal of capacitor balancing chip is used to be separately connected the output end of each super capacitor monomer.The utility model can actively carry out equilibrium, and euqalizing current is big, can effectively meet super capacitor equilibrium.
Description
Technical field
The utility model relates to technical field of battery management, more specifically, it relates to a kind of battery management system.
Background technique
BMS is that the first letter of BATTERY MANAGEMENT SYSTEM referred to as combines, referred to as meaning battery management system
System.The management system of present battery is mainly using passive equilibrium, and the euqalizing current of passive equilibrium BMS is smaller, due to super electricity
The charging and discharging currents for holding application scenarios are larger, and low current equilibrium is not able to satisfy the current requirements of super capacitor equilibrium, therefore at present
Passive equilibrium BMS be not suitable for super capacitor application field.
Utility model content
The technical problems to be solved in the utility model is the above-mentioned deficiency for the prior art, and the utility model provides one kind
Euqalizing current is big, can effectively meet the battery management system of super capacitor equilibrium.
The technical solution of the utility model is: a kind of battery management system, including control chip, temperature sensor, communication
Chip, capacitor balancing chip, capacitance detecting chips, storage chip, the control chip are separately connected the temperature sensor, lead to
Believe chip, capacitor balancing chip, capacitance detecting chips, storage chip, the communication ends of the capacitor balancing chip are correspondingly connected with institute
The communication ends of capacitance detecting chips are stated, the input terminal of the capacitance detecting chips, the input terminal of capacitor balancing chip are used to distinguish
Connect the output end of each super capacitor monomer.
As a further improvement, the CSB pin of the capacitor balancing chip, SDOI pin, SCKB pin respectively correspond
Connect the CSB pin, SDOI pin, SCKB pin of the capacitance detecting chips, the CS pin of the control chip, SCK pin,
SDI pin, SDO pin are connected respectively CS pin, SCK pin, SDI pin, the SDO pin of the capacitance detecting chips.
Further, SCK pin, SDI pin, the SDO pin of the control chip are connected respectively the storage core
SCK pin, SDI pin, the SDO pin of piece.
Further, the capacitor balancing chip is the balancing chip of model LTC3300.
Further, the capacitance detecting chips are the acquisition chip of model LTC6811.
Further, the storage chip is flash memory FLASH.
Further, the communication chip is CAN bus chip, and CAN_TX pin, the CAN_RX of the control chip draw
Foot is connected respectively the CAN_TX pin of the communication chip, CAN_RX pin.
Further, the temperature sensor is the temperature sensor of model NTC.
Further, the single-chip microcontroller that the control chip is model STM32F334.
Beneficial effect
The utility model compared with prior art, has the advantage that are as follows: the utility model is real-time by capacitance detecting chips
It detects the voltage of each super capacitor monomer, current information and is sent to control chip, when the voltage of a certain super capacitor monomer is low
When average voltage, control chip controls capacitor balancing chip, which carries out equilibrium treatment, makes the voltage of each super capacitor monomer
Restore consistent, euqalizing current is big, can effectively meet super capacitor equilibrium；In addition, each super by temperature sensor real-time detection
The temperature of capacitor monomer, when temperature occurs abnormal, control chip exports warning message, to improve balanced stability and safety
Property.
Detailed description of the invention
Fig. 1 is the circuit diagram of the utility model；
Fig. 2 is the circuit diagram of charge/discharge unit in the utility model.
Wherein: U1- controls chip, U2- capacitor balancing chip, U3- capacitance detecting chips, U4- storage chip, U5- communication
Chip.
Specific embodiment
Specific embodiment in reference to the accompanying drawing is described further the utility model.
Refering to fig. 1-2, a kind of battery management system, including control chip U1, temperature sensor, communication chip U5, capacitor
Balancing chip U2, capacitance detecting chips U3, storage chip U4, control chip U1 be separately connected temperature sensor, communication chip U5,
Capacitor balancing chip U2, capacitance detecting chips U3, storage chip U4, the communication ends of capacitor balancing chip U2 are correspondingly connected with capacitor inspection
The communication ends of chip U3 are surveyed, input terminal, the input terminal of capacitor balancing chip U2 of capacitance detecting chips U3 is each for being separately connected
The output end of super capacitor monomer.
In the present embodiment, the single-chip microcontroller that control chip U1 is model STM32F334.Capacitor balancing chip U2 is model
For the balancing chip of LTC3300, LTC3300 is the two-way active balancing based on transformer, and chip interior is integrated with relevant grid
Pole driving circuit, the battery that connects of can contacting to 6 sections be balanced voltage, can by the charge of arbitrarily selected battery its own with
It carries out carrying out transmission back between 12 sections or more.LTC3300 balancing chip can effectively to each super capacitor monomer into
Row equilibrium treatment is mutually cascaded by SPI mode between balancing chip when concatenated super capacitor amount of monomer is more, makes pipe
Voltage range is managed between 11V~1000V.
Capacitance detecting chips U3 is the acquisition chip of model LTC6811, can measure the electricity of up to 12 series-connected cells
Pressure, and have the overall measurement error lower than 1.2mV, the voltage of 0~5V of monomer measurement range, 12 batteries can be complete in 290 μ S
At test, and it can choose lower data acquisition rate and realize that strong noise inhibits.Capacitance detecting chips U3 passes through SPI communication side
Method can reach the high-performance STM32F334 single chip communication of 4.608GHZ with clock frequency, and traffic rate is up to 1Mbps.Capacitor
Detection chip U3 can be connected with 12 capacitor monomers, carry out voltage acquisition.
Storage chip U4 is flash memory FLASH, for storing various balance parameters.Communication chip U5 is CAN bus
Chip, CAN_TX pin, the CAN_RX pin of control chip U1 are connected respectively CAN_TX pin, the CAN_ of communication chip U5
RX pin, host computer are communicated with control chip U1.
Temperature sensor is the temperature sensor of model NTC, obtains temperature value, chip interior by detecting voltage deviation
A/D highest have the conversion speed of 27KHZ, data are transmitted to by control chip U1 by spi bus after converting.When temperature goes out
When now abnormal, control chip U1 exports warning message, to improve balanced stability and safety.
As shown in Figure 1, the CSB pin of capacitor balancing chip U2, SDOI pin, SCKB pin are connected respectively capacitor inspection
CSB pin, SDOI pin, the SCKB pin of chip U3 are surveyed, CS pin, SCK pin, SDI pin, the SDO of control chip U1 draws
Foot is connected respectively CS pin, SCK pin, SDI pin, the SDO pin of capacitance detecting chips U3, controls the SCK of chip U1
Pin, SDI pin, SDO pin are connected respectively the SCK pin, SDI pin, SDO pin of storage chip U4.
In the present embodiment, 12 section serial connected super capacitors respectively with two chip capacitor balancing chip U2 and a piece of capacitance detecting core
Piece U3 connection, i.e. C0~C12 pin of two chip capacitor balancing chip U2 and capacitance detecting chips U3 are separately connected each super capacitor
The both ends of monomer, capacitor monomer are connect by first terminal J1 with capacitor balancing chip U2 and capacitance detecting chips U3.
As shown in Fig. 2, being respectively equipped with charge and discharge list between capacitor balancing chip U2 and the output end of each super capacitor monomer
Member, charge/discharge unit include transformer, metal-oxide-semiconductor component, capacitance component, resistor assembly, diode.C0, C1 interface respectively correspond
Cathode, the anode of first capacitor monomer, the anode of the corresponding second capacitor monomer of C2 interface, remaining interface and so on, C0~
Cn interface is connected respectively C0~C12 pin of capacitor balancing chip U2 and capacitance detecting chips U3.
Such as metal-oxide-semiconductor component includes primary metal-oxide-semiconductor Q11, secondary MOS in charge/discharge unit corresponding with first capacitor monomer
Pipe Q12, capacitance component include first capacitor C11, the second capacitor C12, third capacitor C13, the 4th capacitor C14, the 5th capacitor
C15, the 6th capacitor C16, resistor assembly include first resistor R11, second resistance R12,3rd resistor R13, the 4th resistance R14,
5th resistance R15, the 6th resistance R16, the 7th resistance R17, primary coil one end connection first capacitor monomer of transformer T11
Positive (i.e. C1 interface), the other end connect the drain electrode of primary metal-oxide-semiconductor Q11, and the grid of primary metal-oxide-semiconductor Q11 passes through 3rd resistor R13
The G1P pin of LTC3300 balancing chip is connected, the source electrode of primary metal-oxide-semiconductor Q11 connects the I1P pin of LTC3300 balancing chip,
The source electrode of primary metal-oxide-semiconductor Q11, cathode (the i.e. C0 of first capacitor monomer are connected to after 5th resistance R15, the 6th resistance R16 are in parallel
Interface) between, the positive, negative of first capacitor monomer is connected to after diode D11 is in parallel with first capacitor C11, the second capacitor C12
Between pole, third capacitor C13 is connected to the primary coil both ends of transformer T11 after connecting with first resistor R11.Transformer T11
Secondary coil one end connect secondary pole grade coil one end of the corresponding transformer T21 of the second capacitor monomer, the secondary pole of transformer T11
The coil other end connects the drain electrode of secondary metal-oxide-semiconductor Q12, and the G1S of secondary metal-oxide-semiconductor Q12 grid connection LTC3300 balancing chip draws
Foot, the I1S pin of secondary metal-oxide-semiconductor Q12 source electrode connection LTC3300 balancing chip, the 7th resistance R17 are connected to secondary metal-oxide-semiconductor Q12
Source electrode, first capacitor monomer cathode between, the 4th capacitor C14 be connected to after connecting with second resistance R12 transformer T11 time
Grade coil both ends are connected to secondary coil one end, the first electricity of transformer T11 after the 5th capacitor C15, the 6th capacitor C16 are in parallel
Between the cathode for holding monomer.The mode of connection of other charge/discharge units is similar with the above-mentioned mode of connection.
The principle of capacitor equilibrium: setting equalizing voltage control is 10mv (may be set according to actual conditions occurrence size)
In range, when capacitance detecting chips U3 detects that the voltage of first capacitor monomer is greater than average voltage and be more than average voltage 10mv
When, control chip U1 controls primary metal-oxide-semiconductor Q11 conducting by LTC3300 balancing chip, and the electric energy of first capacitor monomer is passed through
Transformer is transferred in other capacitor monomers, and the voltage between each capacitor monomer is made to restore consistent.When capacitance detecting chips U3 is examined
The voltage of first capacitor monomer is measured less than average voltage and when being more than average voltage 10mv, control chip U1 passes through LTC3300
Balancing chip controls secondary metal-oxide-semiconductor Q12 conducting, and the electric energy of other capacitor monomers is shifted in first capacitor monomer by transformer
The voltage between each capacitor monomer is set to restore consistent.To realize the bidirectional equalization of capacitance voltage.
The utility model has reached 10A due to using active equalization technology, euqalizing current, and monitoring monomer voltage maximum is missed
Difference is in 290 μ v, and charge transfer effciency has reached 90% or more, and anti-interference ability has passed through the test of load current 2400A, work
Temperature has CAN communication interface at -40~80 DEG C, has long-range monitoring, warning function, can manage voltage range 11~
Between 1000V.
The utility model is by the voltage of each super capacitor monomer of capacitance detecting chips real-time detection, current information and sends
Control chip is given, when the voltage of a certain super capacitor monomer is below or above average voltage, control chip controls capacitor is balanced
Chip, which carries out equilibrium treatment, makes the voltage of each super capacitor monomer restore consistent, and euqalizing current is big, can effectively meet super capacitor
It is balanced.
Above are merely preferred embodiments of the utility model, it should be pointed out that for those skilled in the art, In
Under the premise of not departing from the utility model structure, several modifications and improvements can also be made, it is practical new that these all will not influence this
The effect and patent practicability that type is implemented.
Claims (9)
1. a kind of battery management system, it is characterised in that: including control chip (U1), temperature sensor, communication chip (U5), electricity
Hold balancing chip (U2), capacitance detecting chips (U3), storage chip (U4), the control chip (U1) is separately connected the temperature
Sensor, communication chip (U5), capacitor balancing chip (U2), capacitance detecting chips (U3), storage chip (U4), the capacitor are equal
The communication ends of weighing apparatus chip (U2) are correspondingly connected with the communication ends of the capacitance detecting chips (U3), the capacitance detecting chips (U3)
Input terminal, capacitor balancing chip (U2) input terminal be used to be separately connected the output end of each super capacitor monomer.
2. a kind of battery management system according to claim 1, it is characterised in that: the capacitor balancing chip (U2)
CSB pin, SDOI pin, SCKB pin be connected respectively the CSB pins of the capacitance detecting chips (U3), SDOI pin,
SCKB pin, CS pin, SCK pin, SDI pin, the SDO pin of control chip (U1) are connected respectively the capacitor
CS pin, SCK pin, SDI pin, the SDO pin of detection chip (U3).
3. a kind of battery management system according to claim 1, it is characterised in that: the SCK of control chip (U1) draws
Foot, SDI pin, SDO pin are connected respectively the SCK pin, SDI pin, SDO pin of the storage chip (U4).
4. a kind of battery management system according to claim 1, it is characterised in that: the capacitor balancing chip (U2) is type
Number be LTC3300 balancing chip.
5. a kind of battery management system according to claim 1, it is characterised in that: the capacitance detecting chips (U3) are type
Number be LTC6811 acquisition chip.
6. a kind of battery management system according to claim 1, it is characterised in that: the storage chip (U4) is flash memory
Reservoir FLASH.
7. a kind of battery management system according to claim 1, it is characterised in that: the communication chip (U5) is that CAN is total
Core piece, CAN_TX pin, the CAN_RX pin of control chip (U1) are connected respectively the communication chip (U5)
CAN_TX pin, CAN_RX pin.
8. a kind of battery management system according to claim 1, it is characterised in that: the temperature sensor is model
The temperature sensor of NTC.
9. a kind of battery management system according to any one of claims 1 to 8, it is characterised in that: the control chip
(U1) single-chip microcontroller for being model STM32F334.
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| CN201920745248.9U CN209627036U (en) | 2019-05-22 | 2019-05-22 | A kind of battery management system |
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| CN201920745248.9U CN209627036U (en) | 2019-05-22 | 2019-05-22 | A kind of battery management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980753A (en) * | 2019-05-22 | 2019-07-05 | 南阳天一航天科技有限公司 | A kind of battery management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109980753A (en) * | 2019-05-22 | 2019-07-05 | 南阳天一航天科技有限公司 | A kind of battery management system |
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Effective date of registration: 20210721 Address after: 450000 Zhengzhou area of Henan pilot Free Trade Zone, Zhengzhou City, Henan Province Patentee after: Henan zhongzhixing New Energy Technology Co.,Ltd. Address before: 4750 standard workshop of Pangu Avenue in Tongbai industrial agglomeration area, Nanyang City, Henan Province Patentee before: Nanyang Tianyi Space Technology Co.,Ltd. Patentee before: HENAN TIANYI AEROSPACE TECHNOLOGY Co.,Ltd. |