CN105576765A - Voltage acquisition circuit for multiple batteries - Google Patents
Voltage acquisition circuit for multiple batteries Download PDFInfo
- Publication number
- CN105576765A CN105576765A CN201610080228.5A CN201610080228A CN105576765A CN 105576765 A CN105576765 A CN 105576765A CN 201610080228 A CN201610080228 A CN 201610080228A CN 105576765 A CN105576765 A CN 105576765A
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- CN
- China
- Prior art keywords
- voltage
- power supply
- battery
- multiple batteries
- wiring harness
- Prior art date
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Classifications
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- 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
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- 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)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a voltage acquisition circuit for multiple batteries. The voltage acquisition circuit comprises a battery pack formed by at least two battery monomers in a serial-parallel way, a voltage acquisition wiring harness, an acquisition wiring harness connector and a battery management IC (Integrated Circuit), wherein the voltage acquisition wiring harness comprises at least three voltage acquisition lines used for detecting voltage across two ends of each battery monomer; one end of each voltage acquisition line is connected to an anode and a cathode of the corresponding battery monomer, and the other end of each voltage acquisition line is connected to a corresponding input port of the acquisition wiring harness connector; and an output port of the acquisition wiring harness connector is connected to an input end of the battery management IC. The voltage acquisition circuit is mainly applied to a BMS (Battery Management System) and has the advantages of simple wiring, clear nodes, convenience for maintenance, good anti-interference performance, high acquisition precision for voltage of each battery of the battery pack and good reliability.
Description
Technical field
The present invention relates to battery management circuit technical field, be specially a kind of voltage collection circuit of multiple batteries.
Background technology
Application using battery as the electronic equipment of power resources or device is day by day extensive, as gardens electric tool, electric automobile and hybrid vehicle, battery backup system, power grid energy storage, high power portable set etc.As needed device security, reliable, efficient, long-lived operation, then need to protect the core component battery pack of equipment, the voltage of each joint cell is monitored, ensures that its charge and discharge process is in the voltage and temperature range of safety, avoids the generation of super-charge super-discharge electrical phenomena; Also need the consistency ensureing every monomer battery voltage, avoid the inefficacy being caused whole Battery pack by the trouble or failure of single battery, conventional method be enable battery balanced, the battery higher to monomer voltage discharges, to reach the voltage be equal to whole group of other batteries, and error need in acceptable extent and scope, to ensure the consistency of every batteries voltage in battery pack.In some application scenario, due to the restriction of mounting means or because factors such as the unreasonable or interference of battery voltage acquisition line arrangement, the precision of every batteries voltage acquisition can be caused inconsistent, thus the probability causing batteries monomer voltage inconsistent increases, and may cause certain batteries premature failure or inefficacy.
Summary of the invention
In order to overcome the shortcoming that prior art is mentioned, the invention provides a kind of voltage collection circuit of multiple batteries.
The technical solution adopted for the present invention to solve the technical problems is: a kind of voltage collection circuit of multiple batteries, comprise the battery pack be made up of with series-parallel system at least 2 battery cells, voltage acquisition wire harness, gather Wiring harness connector, battery management IC, described voltage acquisition wire harness comprises at least three for detecting the voltage acquisition line of each battery cell both end voltage, one end of described voltage acquisition line is just connecting described battery cell, negative pole, the other end is connected to and gathers the corresponding input port of Wiring harness connector, gather Wiring harness connector output port to be connected with battery management IC input.
Preferably, the voltage collection circuit of described multiple batteries also comprises power supply circuits; The electrode input end of described power supply circuits is connected with total anode of battery pack, and negative input is connected with the total negative terminal of battery pack, and power output end is connected with the power end of battery management IC; Described power supply circuits can improve the stability of a system and energy-conservation degree.
Preferably, the voltage collection circuit of described multiple batteries also comprises power supply input line C_n ', one end of described power supply input line is connected with the total anode of battery pack, the other end is connected with the power supply transit ports gathering Wiring harness connector, and described power supply transit ports is also connected with the electrode input end of power supply circuits.
Preferably, the voltage collection circuit of described multiple batteries also comprises power supply branch road, and one end of described power supply branch road voltage acquisition line corresponding with the total anode of battery pack is electrically connected by gathering Wiring harness connector, the other end and power supply circuits electrode input end be connected.
Preferably, series connection one 0 Ohmic resistances in described power supply branch road.
Preferably, the voltage collection circuit of described multiple batteries also comprises micro control unit MCU, and described micro control unit MCU is communicatively connected with multi-string battery Management IC.
The communication modes of described battery management IC and micro control unit MCU is any one in CAN or RS232 or RS485 or SPI.
Preferably, gather described in each between Wiring harness connector and battery management IC and be also connected with anti-static circuit unit, voltage stabilizing circuit unit and filter circuit unit in turn.
Described anti-static circuit unit adopts TVS pipe; Described voltage stabilizing circuit unit adopts voltage withstand class to be the voltage-stabiliser tube of 6.2V; Described filter circuit unit adopts single order RC low-pass filter circuit.
The invention has the beneficial effects as follows: the connection circuit of a kind of voltage of batteries collection of the present invention is mainly used in BMS system (i.e. battery management system, be set battery monitoring, control and manage that be integrated, complicated electrical control system) on, its line is simple, each node is clear, convenient for maintaining, and anti-interference is good, high to the acquisition precision of battery pack each batteries voltage, good reliability.
Accompanying drawing explanation
Fig. 1 is schematic block circuit diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further detailed.
As shown in Figure 1, a kind of voltage collection circuit of multiple batteries, comprise be made up of with series-parallel system at least 2 battery cells battery pack, voltage acquisition wire harness, gather Wiring harness connector, battery management IC, described voltage acquisition wire harness comprises at least three for detecting the voltage acquisition line of each battery cell both end voltage, one end of described voltage acquisition line connects the positive and negative electrode of described battery cell, the other end is connected to and gathers the corresponding input port of Wiring harness connector, gathers Wiring harness connector output port and is connected with battery management IC input.
The voltage collection circuit of described multiple batteries also comprises power supply circuits; The electrode input end of described power supply circuits is connected with total anode of battery pack, and negative input is connected with the total negative terminal of battery pack, and power output end is connected with the power end of battery management IC; Described power supply circuits can improve the stability of a system and energy-conservation degree.
The voltage collection circuit of described multiple batteries also comprises power supply input line C_n ', one end of described power supply input line is connected with the total anode of battery pack, the other end is connected with the power supply transit ports gathering Wiring harness connector, and described power supply transit ports is also connected with the electrode input end of power supply circuits.
The voltage collection circuit of described multiple batteries also comprises power supply branch road, and one end of described power supply branch road voltage acquisition line corresponding with the total anode of battery pack is electrically connected by gathering Wiring harness connector, the other end and power supply circuits electrode input end be connected.
Series connection one 0 Ohmic resistances in described power supply branch road.
The voltage collection circuit of described multiple batteries also comprises micro control unit MCU, and described micro control unit MCU is communicatively connected with multi-string battery Management IC.
The communication modes of described battery management IC and micro control unit MCU is any one in CAN or RS232 or RS485 or SPI.
Gather described in each between Wiring harness connector and battery management IC and be also connected with anti-static circuit unit, voltage stabilizing circuit unit and filter circuit unit in turn.
Described anti-static circuit unit adopts TVS pipe; Described voltage stabilizing circuit unit adopts voltage withstand class to be the voltage-stabiliser tube of 6.2V; Described filter circuit unit adopts single order RC low-pass filter circuit.
For different uses, installation environment and precision, cost requirement, provide following two kinds of preferred versions:
1, when the installation site distance BMS system (comprising battery management IC and micro control unit MCU) of battery pack is nearer, can selection scheme one, namely the voltage acquisition line of the C_n ＇ in voltage acquisition wire harness is omitted, simultaneously connected node 1. and node 2. between 0 Ohmic resistance, power supply circuits input connecting line connects one end of 0 Ohmic resistance, and 1. the other end of 0 Ohmic resistance connects the node of voltage acquisition line C_n.Realize power supply circuits power taking and most high node voltage acquisition common voltage gathering line C_n, decrease the arrangement of voltage acquisition line C_n ＇, reduce cost simultaneously.
2, when the installation site distance BMS system of battery pack is far away, can selection scheme two, namely the C_n ＇ in voltage acquisition wire harness is connected, simultaneously cancel use node 1. and node 2. between 0 Ohmic resistance, connected node voltage acquisition line C_n and power supply circuits being inputted connecting line is arranged on the Node B+place of the highest battery, most high node battery voltage acquisition line C_n is adopted after node 3., to separate winding displacement with power supply input line, reduce the interference of current supply circuit to most high node battery voltage acquisition circuit, improve the precision of voltage acquisition, improve the voltage acquisition precision consistency of every batteries in battery pack simultaneously, also the reliability of BMS system is improved.
The operation principle of this circuit: when BMS system carries out passive balanced management to the battery of discharge and recharge, battery management IC exports control signal, opens corresponding balanced circuit switching, is communicated with balanced loop, carries out electric discharge management to the single node pond that voltage is higher.Power supply when battery management IC normally works is normally from the most high node power taking of battery pack, and the negative pole of the lowest section of CB common battery group, namely provides power supply by battery pack to battery management IC.Thus, most significant end one node pool voltage acquisition line and power supply circuits input line just can share same node, installation site distance BMS alliance as battery pack is far away, the interference that most high node cell voltage collection is subject to current supply circuit is added in the prolongation of circuit, just most high node cell voltage Acquisition Error can be caused larger, the probability that whole Battery pack voltage finally will be caused inconsistent strengthens, and affects the reliability of using electricity system.
As described above, be only preferred embodiment of the present invention, when not limiting scope of the invention process with this, the simple equivalence namely generally done according to the present patent application the scope of the claims and invention description content changes and modifies, and all still remains within the scope of the patent.
Claims (10)
1. the voltage collection circuit of a multiple batteries, it is characterized in that, comprise be made up of with series-parallel system at least 2 battery cells battery pack, voltage acquisition wire harness, gather Wiring harness connector, battery management IC, described voltage acquisition wire harness comprises at least three for detecting the voltage acquisition line of each battery cell both end voltage, one end of described voltage acquisition line connects the positive and negative electrode of described battery cell, the other end is connected to and gathers the corresponding input port of Wiring harness connector, gathers Wiring harness connector output port and is connected with battery management IC input.
2. the voltage collection circuit of a kind of multiple batteries according to claim 1, it is characterized in that, also comprise power supply circuits, the electrode input end of described power supply circuits is connected with total anode of battery pack, negative input is connected with the total negative terminal of battery pack, and power output end is connected with the power end of battery management IC.
3. the voltage collection circuit of a kind of multiple batteries according to claim 2, it is characterized in that, also comprise power supply input line C_n ', one end of described power supply input line is connected with the total anode of battery pack, the other end is connected with the power supply transit ports gathering Wiring harness connector, and described power supply transit ports is also connected with the electrode input end of power supply circuits.
4. the voltage collection circuit of a kind of multiple batteries according to claim 2, it is characterized in that, also comprise power supply branch road, one end of described power supply branch road voltage acquisition line corresponding with the total anode of battery pack is electrically connected by gathering Wiring harness connector, the other end and power supply circuits electrode input end be connected.
5. the voltage collection circuit of a kind of multiple batteries according to claim 4, is characterized in that, one 0 Ohmic resistances of connecting in described power supply branch road.
6. the voltage collection circuit of a kind of multiple batteries according to claim 1, is characterized in that, also comprises micro control unit MCU, and described micro control unit MCU is communicatively connected with multi-string battery Management IC.
7. the voltage collection circuit of a kind of multiple batteries according to claim 6, is characterized in that, the communication modes of described battery management IC and micro control unit MCU is any one in CAN or RS232 or RS485 or SPI.
8. the voltage collection circuit of a kind of multiple batteries according to claim 1, is characterized in that, gathers between Wiring harness connector and battery management IC and be also connected with anti-static circuit unit, voltage stabilizing circuit unit and filter circuit unit in turn described in each.
9. the voltage collection circuit of a kind of multiple batteries according to claim 8, is characterized in that, described anti-static circuit unit adopts TVS pipe.
10. the voltage collection circuit of a kind of multiple batteries according to claim 8, is characterized in that, described voltage stabilizing circuit unit adopts voltage withstand class to be the voltage-stabiliser tube of 6.2V, and described filter circuit unit adopts 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 |
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| CN105576765A true CN105576765A (en) | 2016-05-11 |
| CN105576765B CN105576765B (en) | 2019-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610080228.5A Active CN105576765B (en) | 2016-02-04 | 2016-02-04 | A kind of voltage collection circuit of multiple batteries |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| CN102422504A (en) * | 2009-05-18 | 2012-04-18 | 波士顿电力公司 | Energy efficient and fast charge modes of a rechargeable battery |
| US20120094150A1 (en) * | 2010-10-14 | 2012-04-19 | Alliant Techsystems Inc. | Methods and apparatuses for electrochemical cell monitoring and control |
| CN103891093A (en) * | 2011-10-20 | 2014-06-25 | 日立车辆能源株式会社 | Battery system monitoring device and charge storage device equipped with same |
| CN103904376A (en) * | 2014-04-23 | 2014-07-02 | 武汉市欧力普能源与自动化技术有限公司 | Self-adaptive optimized control system and method of distributive battery management system |
| 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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2016
- 2016-02-04 CN CN201610080228.5A patent/CN105576765B/en active Active
Patent Citations (5)
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| CN102422504A (en) * | 2009-05-18 | 2012-04-18 | 波士顿电力公司 | Energy efficient and fast charge modes of a rechargeable battery |
| US20120094150A1 (en) * | 2010-10-14 | 2012-04-19 | Alliant Techsystems Inc. | Methods and apparatuses for electrochemical cell monitoring and control |
| CN103891093A (en) * | 2011-10-20 | 2014-06-25 | 日立车辆能源株式会社 | Battery system monitoring device and charge storage device equipped with same |
| CN103904376A (en) * | 2014-04-23 | 2014-07-02 | 武汉市欧力普能源与自动化技术有限公司 | Self-adaptive optimized control system and method of distributive battery management system |
| 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 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| Publication number | Publication date |
|---|---|
| CN105576765B (en) | 2019-08-30 |
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