CN105576765B - A kind of voltage collection circuit of multiple batteries - Google Patents
A kind of voltage collection circuit of multiple batteries Download PDFInfo
- Publication number
- CN105576765B CN105576765B CN201610080228.5A CN201610080228A CN105576765B CN 105576765 B CN105576765 B CN 105576765B CN 201610080228 A CN201610080228 A CN 201610080228A CN 105576765 B CN105576765 B CN 105576765B
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- CN
- China
- Prior art keywords
- voltage
- power supply
- acquisition
- battery
- circuit
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention discloses a kind of voltage collection circuit of multiple batteries, including be made of at least two battery cell with series-parallel system battery pack, voltage acquisition harness, acquisition Wiring harness connector, battery management IC, the voltage acquisition harness includes at least three for detecting the voltage acquisition line of each battery cell both end voltage, one end of the voltage acquisition line connects the positive and negative electrode of the battery cell, the other end is connected to acquisition Wiring harness connector and corresponds to input port, and acquisition Wiring harness connector output port is connect with battery management IC input terminal.This circuit is mainly used in BMS system, and line is simple, and each node is clear, facilitates maintenance, and anti-interference is good, and the acquisition precision for the cell voltage that respectively economizes on electricity to battery pack is high, good reliability.
Description
Technical field
The present invention relates to battery management circuit technical field, specially a kind of voltage collection circuit of multiple batteries.
Background technique
It is increasingly extensive with the application of battery electronic equipment as a source of power or device, such as gardens electric tool, electronic
Automobile and hybrid vehicle, battery backup system, power grid energy storage, high power portable device etc..If you need to equipment safety,
Reliably, efficiently, long-lived operation, then need to protect the core component battery pack of equipment, to the electricity of each section single battery
Pressure is monitored, and guarantees that its charge and discharge process in the voltage of safety and temperature range, avoids the generation of super-charge super-discharge electrical phenomena；
The consistency for also needing to guarantee every monomer battery voltage, avoids the trouble or failure by single battery and causes the mistake of whole group battery
Effect, conventional method be enable it is battery balanced, the battery higher to monomer voltage discharges, with reach and whole group other economize on electricity
The equivalent voltage in pond, and error need to be in acceptable extent and scope, to guarantee the consistency of every economize on electricity cell voltage in battery pack.
In certain applications, due to mounting means limitation or because the arrangement of battery voltage acquisition line unreasonable or interference etc. because
Element, the precision that will cause every batteries voltage acquisition is inconsistent, increases so as to cause the inconsistent probability of batteries monomer voltage,
It may cause certain batteries premature failure or failure.
Summary of the invention
The shortcomings that in order to overcome the prior art to refer to, the present invention provide a kind of voltage collection circuit of multiple batteries.
The technical solution adopted by the present invention to solve the technical problems is: a kind of voltage collection circuit of multiple batteries, packet
It includes the battery pack being made of at least two battery cell with series-parallel system, voltage acquisition harness, acquire Wiring harness connector, battery
IC is managed, the voltage acquisition harness includes at least three for detecting the voltage acquisition line of each battery cell both end voltage,
One end of the voltage acquisition line connects the positive and negative electrode of the battery cell, and it is corresponding that the other end is connected to acquisition Wiring harness connector
Input port, acquisition Wiring harness connector output port are connect with battery management IC input terminal.
Preferably, the voltage collection circuit of the multiple batteries further includes power supply circuit；The anode of the power supply circuit is defeated
The total anode for entering end and battery pack connects, and negative input is connect with the total negative terminal of battery pack, power output end and battery management IC
Power end connection；System stability and energy conservation degree can be improved in the power supply circuit.
Preferably, the voltage collection circuit of the multiple batteries further includes supply input line C_n ', the supply input line
One end connect with the total anode of battery pack, the other end with acquisition Wiring harness connector power supply transit ports connect, it is described power supply turn
Port is connect also to connect with the electrode input end of power supply circuit.
Preferably, the voltage collection circuit of the multiple batteries further include power supply branch, it is described power supply branch one end with
The corresponding voltage acquisition line of the total anode of battery pack passes through acquisition Wiring harness connector electrical connection, the anode of the other end and power supply circuit
Input terminal connection.
Preferably, one 0 Ohmic resistances of series connection in the power supply branch.
Preferably, the voltage collection circuit of the multiple batteries further includes micro control unit MCU, the micro control unit MCU with
Multi-string battery management IC is communicatively connected.
The communication modes of the battery management IC and micro control unit MCU are any in CAN or RS232 or RS485 or SPI
It is a kind of.
Preferably, anti-static circuit list is also connected in turn between each acquisition Wiring harness connector and battery management IC
Member, voltage regulator circuit unit and filter circuit unit.
The anti-static circuit unit uses TVS pipe；The voltage regulator circuit unit uses stress levels for the pressure stabilizing of 6.2V
Pipe；The filter circuit unit uses single order RC low-pass filter circuit.
The beneficial effects of the present invention are: the connection circuit that a kind of voltage of batteries of the invention acquires is mainly used in
In BMS system (i.e. battery management system is set battery monitoring, control and manages electrical control system be integrated, complicated),
Its line is simple, and each node is clear, facilitates maintenance, and anti-interference is good, the acquisition for the cell voltage that respectively economizes on electricity to battery pack
Precision is high, good reliability.
Detailed description of the invention
Fig. 1 is schematic block circuit diagram of the invention.
Specific embodiment
The present invention is further detailed with reference to the accompanying drawing.
As shown in Figure 1, a kind of voltage collection circuit of multiple batteries, including by least two battery cell with series-parallel side
The battery pack of formula composition, voltage acquisition harness, acquisition Wiring harness connector, battery management IC, the voltage acquisition harness include extremely
Few three for detecting the voltage acquisition line of each battery cell both end voltage, one end connection electricity of the voltage acquisition line
The positive and negative electrode of pond monomer, the other end are connected to acquisition Wiring harness connector and correspond to input port, acquire Wiring harness connector output port
It is connect with battery management IC input terminal.
The voltage collection circuit of the multiple batteries further includes power supply circuit；The electrode input end and electricity of the power supply circuit
Total anode of pond group connects, and negative input is connect with the total negative terminal of battery pack, the power end of power output end and battery management IC
Connection；System stability and energy conservation degree can be improved in the power supply circuit.
The voltage collection circuit of the multiple batteries further includes supply input line C_n ', one end of the supply input line with
The total anode connection of battery pack, the other end are connect with the power supply transit ports of acquisition Wiring harness connector, and the power supply transit ports are also
It is connect with the electrode input end of power supply circuit.
The voltage collection circuit of the multiple batteries further includes power supply branch, and one end of the power supply branch and battery pack are total
The corresponding voltage acquisition line of anode passes through acquisition Wiring harness connector electrical connection, the electrode input end company of the other end and power supply circuit
It connects.
One 0 Ohmic resistances of series connection in the power supply branch.
The voltage collection circuit of the multiple batteries further includes micro control unit MCU, the micro control unit MCU and multi-string battery
Management IC is communicatively connected.
The communication modes of the battery management IC and micro control unit MCU are any in CAN or RS232 or RS485 or SPI
It is a kind of.
Anti-static circuit unit, pressure stabilizing are also connected in turn between each acquisition Wiring harness connector and battery management IC
Circuit unit and filter circuit unit.
The anti-static circuit unit uses TVS pipe；The voltage regulator circuit unit uses stress levels for the pressure stabilizing of 6.2V
Pipe；The filter circuit unit uses single order RC low-pass filter circuit.
For different uses, installation environment and precision, cost requirement, following two preferred embodiment is provided:
It 1, can when the installation site distance BMS system of battery pack (including battery management IC and micro control unit MCU) is closer
Selection scheme one, i.e., omission voltage acquisition harness in C_n ' voltage acquisition line, while connecting node 1. with node 2. it
Between 0 Ohmic resistance, power supply circuit input terminal connecting line connects one end of 0 Ohmic resistance, and the other end of 0 Ohmic resistance connects electricity
Press the node of gathering line C_n 1..It realizes that power supply circuit takes electricity to acquire with highest node voltage and shares voltage acquisition line C_n, reduces
The arrangement of voltage acquisition line C_n ', reduces costs simultaneously.
2, when the installation site distance BMS system of battery pack farther out when, may be selected scheme two, i.e., connection voltage acquisition harness
In C_n ', while cancel using node 1. and node 2. between 0 Ohmic resistance, by voltage acquisition line C_n and power supply electricity
The connecting node of road input connecting line is arranged at the node B+ of highest battery, using highest node battery voltage acquisition line C_n
Winding displacement is 3. separated later in node with supply input line, reduces current supply circuit and highest node battery voltage acquisition route is done
It disturbs, improves the precision of voltage acquisition, while improving the voltage acquisition precision consistency of every batteries in battery pack, also improve
The reliability of BMS system.
The working principle of this circuit: when battery of the BMS system to charge and discharge carries out passive balanced management, battery management IC
Output control signal, opens corresponding balanced circuit switching, is connected to balanced circuit, the single node pond higher to voltage is put
Fulgurite reason.Power supply when battery management IC is worked normally is usually to take electricity, CB common battery group from the highest node of battery pack
Lowest section cathode, i.e., by battery pack give battery management IC provide power supply.As a result, one node pool voltage acquisition line of most significant end with
Power supply circuit input line will share same node, as battery pack the system position installation site distance BMS farther out, route prolongs
It is long to add interference of the highest node pool voltage acquisition by current supply circuit, will cause highest node pool voltage acquisition error compared with
Greatly, the probability that whole group cell voltage will eventually be caused inconsistent increases, and influences the reliability of electricity system.
As described above, only presently preferred embodiments of the present invention, when cannot be limited the scope of implementation of the present invention with this,
All still belong to this hair according to simple equivalent changes and modifications made by scope of the present invention patent and invention description content generally
In the range of bright patent covers.
Claims (1)
1. a kind of voltage collection circuit of multiple batteries, which is characterized in that including by least two battery cell with series-parallel system
The battery pack of composition, voltage acquisition harness, acquisition Wiring harness connector, battery management IC, the voltage acquisition harness include at least
Three for detecting the voltage acquisition line of each battery cell both end voltage, one end connection battery of the voltage acquisition line
The positive and negative electrode of monomer, the other end are connected to acquisition Wiring harness connector and correspond to input port, acquire Wiring harness connector output port and
The connection of battery management IC input terminal；
Wherein, the voltage collection circuit further includes micro control unit MCU, the micro control unit MCU and multi-string battery management IC with
Communication modes connection；The communication modes of the battery management IC and micro control unit MCU are in CAN or RS232 or RS485 or SPI
Any one；
It wherein, further include power supply circuit, the electrode input end of the power supply circuit and total anode of battery pack connect, cathode input
End is connect with the total negative terminal of battery pack, and power output end is connect with the power end of battery management IC；
Further include supply input line C_n ', one end of the supply input line C_n ' is connect with the total anode of battery pack, the other end with
The power supply transit ports connection of Wiring harness connector is acquired, the power supply transit ports also connect with the electrode input end of power supply circuit
It connects；
It further include power supply branch, one end voltage acquisition line corresponding with the total anode of battery pack of the power supply branch passes through gathering line
The electrode input end of the electrical connection of beam connector, the other end and power supply circuit connects；
One 0 Ohmic resistances of series connection in the power supply branch；
Anti-static circuit unit, voltage regulator circuit are also connected in turn between each acquisition Wiring harness connector and battery management IC
Unit and filter circuit unit；
The anti-static circuit unit uses TVS pipe；
The voltage regulator circuit unit uses stress levels for the voltage-stabiliser tube of 6.2V, and the filter circuit unit uses single order RC low pass
Filter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080228.5A CN105576765B (en) | 2016-02-04 | 2016-02-04 | A kind of voltage collection circuit of multiple batteries |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610080228.5A CN105576765B (en) | 2016-02-04 | 2016-02-04 | A kind of voltage collection circuit of multiple batteries |
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| Publication Number | Publication Date |
|---|---|
| CN105576765A CN105576765A (en) | 2016-05-11 |
| CN105576765B true CN105576765B (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610080228.5A Active CN105576765B (en) | 2016-02-04 | 2016-02-04 | A kind of voltage collection circuit of multiple batteries |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108387846A (en) * | 2018-02-05 | 2018-08-10 | 国网山东省电力公司信息通信公司 | A kind of communications equipment room battery pack on-line monitoring equipment and monitoring method |
| CN109001641A (en) * | 2018-07-04 | 2018-12-14 | 上汽时代动力电池系统有限公司 | A kind of battery modules detection device |
| CN110729502A (en) * | 2019-10-24 | 2020-01-24 | 武汉格罗夫氢能汽车有限公司 | Information acquisition system of proton exchange membrane fuel cell engine |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010135260A2 (en) * | 2009-05-18 | 2010-11-25 | Boston-Power, Inc. | Energy efficient and fast charge modes of a rechargeable battery |
| US8470464B2 (en) * | 2010-10-14 | 2013-06-25 | Alliant Techsystems Inc. | Methods and apparatuses for electrochemical cell monitoring and control |
| EP2770606B1 (en) * | 2011-10-20 | 2019-04-17 | Hitachi Automotive Systems, Ltd. | Battery system monitoring device and charge storage device equipped with same |
| CN103904376B (en) * | 2014-04-23 | 2016-08-17 | 武汉市欧力普能源与自动化技术有限公司 | The control system of a kind of distributed battery management system adaptive optimization and method |
| CN205489642U (en) * | 2016-02-04 | 2016-08-17 | 惠州市蓝微新源技术有限公司 | Voltage acquisition circuit of multisection battery |
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| CN105576765A (en) | 2016-05-11 |
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