CN104908600A - Safety control system of electric vehicle battery pack - Google Patents
Safety control system of electric vehicle battery pack Download PDFInfo
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- CN104908600A CN104908600A CN201510266542.8A CN201510266542A CN104908600A CN 104908600 A CN104908600 A CN 104908600A CN 201510266542 A CN201510266542 A CN 201510266542A CN 104908600 A CN104908600 A CN 104908600A
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- battery
- control system
- safety control
- battery pack
- electric vehicle
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a safety control system of an electric vehicle battery pack. The safety control system comprises multiple controllable switches, a battery management system and a whole vehicle controller, wherein each controllable switch is serially connected between adjacent two simple batteries; the battery management system is respectively connected with each simple battery of the battery pack, acquires the voltage and the temperature of the simple batteries and the current of the battery pack, and sends to the whole vehicle controller; and the whole vehicle controller is respectively connected with each controllable switch, and controls the connection/disconnection of the corresponding controllable switches according to the voltage, temperature and current information sent by the battery management system. The safety control system adopts the battery management system BMS to acquire the current, the voltage and the temperature of the battery pack in real time, adopts an insulation monitor to detects insulation faults of the battery pack in real time, and uses the whole vehicle controller for controlling the disconnection of the controllable switches among the batteries according to detecting results, so that the risk of battery spontaneous combustion or person electric shock is effectively prevented and warned, and the protection for whole vehicle parts and personal and property safety is realized.
Description
Technical field
The present invention relates to battery of electric vehicle management, particularly a kind of safety control system of battery of electric vehicle group.
Background technology
Electronlmobil is invented prior to internal-combustion engines vehicle, after abdicate dominant position due to the various advantages of combustion engine.Nineteen seventies, there is petroleum-based energy crisis in world wide, is once causing the attention to electronlmobil research and development.After nineteen nineties, verify the use that minable oil reserves only reaches decades, China, along with expanding economy, is transformed into maximum oil importers from oil exportiog countries rapidly, and dependence on external supply degree is more than 50%.The pollution of environment and destruction, also result in the attention of global range national governments.The sense of crisis of the energy, and the pressure of energy-saving and emission-reduction, cause the research and development upsurge of elec. vehicle again.
In electronlmobil, power battery pack is the core component affecting the key indexs such as car load tractive performance, course continuation mileage, cost.But the high-energy-density of power battery pack becomes car load parts the most dangerous on electronlmobil.The main hidden danger that when current internal short-circuit is electrokinetic cell unexpected heat, the hot decrepitate of initiation battery out of control is fried.And overcurrent flows and car body collide and are easy to cause the internal short-circuit of battery.If battery generation insulation fault simultaneously, personnel surprisingly touch the danger that battery probably causes electric shock.Therefore, the situation jeopardizing the person, vehicle part, battery, the outer personal safety as well as the property safety of car detected, disconnect total just always negative relay and service switch when all can not stop harm development, in battery serial connection, many places disconnect electrical connection, effectively can stop the generation of above-mentioned situation.
The simplest technical scheme is series connection place interpolation fuse of every case battery, when there is excess current, disconnect the connection between battery box immediately, allow the precise requirements of maximum current higher to fuse like this, be unfavorable for the protection of actual conditions battery.Application number is use in the patent of 201280019619.6 a kind of to connect a gate-controlled switch at battery connection circuitry, high voltage variable low pressure is realized by the closed and disconnected controlling gate-controlled switch, but higher to the requirement of technique like this and cost improves more, and connection lead is numerous also easily causes interference; Application number is the patent of 201280019619.6, devises a kind of novel secondary battery link, but this parts are also utilize the difference of the fusing point between conductor to realize disconnecting fast.Application number is the patent of 201280019619.6, be a kind of by extra electronic control module to realize the cutout of electric current, relative cost is higher.
Summary of the invention
For overcoming the shortcomings and deficiencies of above-mentioned prior art, the invention provides a kind of safety control system of battery of electric vehicle group.
Technical scheme of the present invention is:
A safety control system for battery of electric vehicle group, comprising:
Some gate-controlled switches, each gate-controlled switch is connected between adjacent two cells respectively;
Battery management system (BMS), battery management system connects each cell of battery pack respectively, gathers the voltage of cell and the electric current of temperature and battery pack, and is sent to entire car controller;
Entire car controller, entire car controller connects each gate-controlled switch respectively, and controls the break-make of corresponding gate-controlled switch according to voltage, temperature and current information that battery management system sends.
Preferably, described safety control system also comprises insulating monitor, and described insulating monitor input end is connected to total anode of battery pack, total negative terminal and insulation ground, and mouth connects entire car controller.
Preferably, described battery management system (BMS) comprises main control module (BCU) and some connected from control module (BMU) respectively, and each being connected to from control module gathers the voltage of cell and the voltage detection unit of temperature signal and temperature sensor.
Preferably, described main control module (BCU) is also connected with the current sensor gathering battery pack total current.
Preferably, described entire car controller is also connected with instrument, and described instrument, with manual switch, controls gate-controlled switch and again closes.
Preferably, described entire car controller is also connected with warning device.
Further preferred, described gate-controlled switch is the one in the circuit parallel of relay, IGBT or half control device and diode.
Advantage of the present invention is:
The safety control system of battery of electric vehicle group provided by the present invention; adopt the electric current of battery management system BMS Real-time Collection battery pack, voltage and temperature; insulating monitor is adopted to carry out the insulation failure detection of battery pack in real time; and according to testing result utilize between vehicle control unit controls battery the disconnection of gate-controlled switch; the danger of effective prevention and warning battery spontaneous combustion or personnel's electric shock, realizes the protection to car load parts and personal safety as well as the property safety.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described:
Fig. 1 is the electrical schematic diagram of the safety control system of battery of electric vehicle group of the present invention;
Fig. 2 is the closed diagram of circuit with disconnecting of gate-controlled switch of the present invention.
Detailed description of the invention
As shown in Figure 1, the safety control system of disclosed battery of electric vehicle group, comprises with lower part:
1. some gate-controlled switches, each gate-controlled switch is connected between adjacent two cells of battery pack respectively, described gate-controlled switch is the one in the circuit parallel of relay, IGBT or half control device and diode, has ambipolar, high-power, the characteristic such as on state resistance is little, saturation pressure reduction.
2. battery management system (BMS), described battery management system (BMS) comprise main control module (BCU) and some respectively connected from control module BMU, each being connected to from control module BMU gathers the voltage of cell and the voltage detection unit of temperature signal and temperature sensor, and voltage and temperature signal is converted into the D and A converter of digital signal; Described main control module (BCU) is connected with the current sensor gathering battery pack total current; Data are delivered to BMU by inner CAN by the detection of monomer battery voltage, temperature, and then are delivered in BCU and process, and battery pack total current is directly detected by current sensor and is delivered in BCU.Battery management system gathers the electric current of the voltage of cell, temperature and battery pack, and is sent to entire car controller.
3. insulating monitor, described safety control system also comprises insulating monitor, and described insulating monitor input end is connected to total anode of battery pack, total negative terminal and insulation ground, and mouth connects entire car controller.Insulating monitor monitors the insulation resistance between total just, the total negative terminal of battery pack and insulation ground, if insulation resistance is lower than setting value, then system sends insulation fault signal to entire car controller.
4. entire car controller, entire car controller connects each gate-controlled switch respectively, and the break-make of gate-controlled switch corresponding to the insulation fault signal control that sends of the voltage sent according to battery management system, temperature and current information and insulating monitor.Described entire car controller is also connected with instrument and warning device, and described instrument is with manual switch, and control gate-controlled switch and again close, warning device gives the alarm.The entire car controller of this programme also can by independent MCU, the replacements such as DSP.
Concrete, several situation entire car controller can disconnect gate-controlled switch below: (1) battery pack total current is excessive, and size of current can have current sensor to obtain; (2) monomer battery voltage is not in controlled range, and voltage can be obtained by the voltage detection unit of BMU; (3) cell temperature is not in controlled range, and temperature can be obtained by temperature sensor; (4) battery report insulation fault, breakdown signal can be obtained by insulating monitor; (5) instrument Non-follow control; Above five kinds of situations can provide signal to entire car controller, are transmitted control signal by vehicle controller, control gate-controlled switch and close, disconnect.
The closed flow process with disconnecting of gate-controlled switch of the present invention, as shown in Figure 2.Only have the hand switch of instrument to control again close gate-controlled switch, after pressing lower hand switch, first current sensor detects total current whether in range of set value, if not, then entire car controller controls gate-controlled switch disconnection automatically, and reports to the police; If total current is in range of set value, then BMU detects cell pressure whether in range of set value, if not, then entire car controller automatically controls gate-controlled switch and disconnects, and reports to the police; If monomer battery voltage is in range of set value, then BMU detects battery temperature whether in range of set value, if do not existed, entire car controller automatically controls gate-controlled switch and disconnects, and reports to the police; If cell temperature is in range of set value, then whether insulating monitor monitoring battery pack there is insulation fault, if there is insulation fault, entire car controller automatically controls gate-controlled switch and disconnects, and reports to the police; If do not report insulation fault, then gate-controlled switch remains closed.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to person skilled in the art can be understood content of the present invention and implement according to this, can not limit the scope of the invention with this.All modifications done according to the Spirit Essence of main technical schemes of the present invention, all should be encompassed within protection scope of the present invention.
Claims (7)
1. a safety control system for battery of electric vehicle group, is characterized in that, comprising:
Some gate-controlled switches, each gate-controlled switch is connected between adjacent two cells respectively;
Battery management system (BMS), battery management system connects each cell of battery pack respectively, gathers the voltage of cell and the electric current of temperature and battery pack, and is sent to entire car controller;
Entire car controller, entire car controller connects each gate-controlled switch respectively, and controls the break-make of corresponding gate-controlled switch according to voltage, temperature and current information that battery management system sends.
2. the safety control system of battery of electric vehicle group according to claim 1, it is characterized in that, described safety control system also comprises insulating monitor, and described insulating monitor input end is connected to total anode of battery pack, total negative terminal and insulation ground, and mouth connects entire car controller.
3. the safety control system of battery of electric vehicle group according to claim 2, it is characterized in that, described battery management system (BMS) comprises main control module (BCU) and some connected from control module (BMU) respectively, and each being connected to from control module gathers the voltage of cell and the voltage detection unit of temperature signal and temperature sensor.
4. the safety control system of battery of electric vehicle group according to claim 3, is characterized in that, described main control module (BCU) is also connected with the current sensor gathering battery pack total current.
5. the safety control system of battery of electric vehicle group according to claim 4, is characterized in that, described entire car controller is also connected with instrument, and described instrument, with manual switch, controls gate-controlled switch and again closes.
6. the safety control system of battery of electric vehicle group according to claim 5, is characterized in that, described entire car controller is also connected with warning device.
7. the safety control system of battery of electric vehicle group according to claim 1, is characterized in that, described gate-controlled switch is the one in the circuit parallel of relay, IGBT or half control device and diode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510266542.8A CN104908600A (en) | 2015-05-25 | 2015-05-25 | Safety control system of electric vehicle battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510266542.8A CN104908600A (en) | 2015-05-25 | 2015-05-25 | Safety control system of electric vehicle battery pack |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105914837A (en) * | 2016-05-25 | 2016-08-31 | 国轩新能源（苏州）有限公司 | Safety protection mechanism for battery system |
| CN105932344A (en) * | 2016-05-13 | 2016-09-07 | 浙江安美科技有限公司 | Cascadable power battery pack safety protection module |
| CN107732985A (en) * | 2016-08-10 | 2018-02-23 | 宁德时代新能源科技股份有限公司 | Distributed battery management system |
| CN109649301A (en) * | 2017-10-10 | 2019-04-19 | 奥迪股份公司 | Spontaneous combustion early warning system and method for vehicle |
| CN112448469A (en) * | 2020-11-06 | 2021-03-05 | 株洲中车时代电气股份有限公司 | Battery redundancy control system |
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| CN112448469A (en) * | 2020-11-06 | 2021-03-05 | 株洲中车时代电气股份有限公司 | Battery redundancy control system |
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Application publication date: 20150916 |