CN102832672A - Charging device and charging method - Google Patents
Charging device and charging method Download PDFInfo
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- CN102832672A CN102832672A CN2012103386442A CN201210338644A CN102832672A CN 102832672 A CN102832672 A CN 102832672A CN 2012103386442 A CN2012103386442 A CN 2012103386442A CN 201210338644 A CN201210338644 A CN 201210338644A CN 102832672 A CN102832672 A CN 102832672A
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- 238000007600 charging Methods 0.000 title claims abstract description 136
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- 239000003792 electrolyte Substances 0.000 abstract description 9
- 238000000354 decomposition reaction Methods 0.000 abstract description 5
- 238000003487 electrochemical reaction Methods 0.000 abstract description 5
- 238000007086 side reaction Methods 0.000 abstract description 5
- 230000008961 swelling Effects 0.000 abstract 1
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- 230000008859 change Effects 0.000 description 4
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- 238000012544 monitoring process Methods 0.000 description 4
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- 238000004146 energy storage Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
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- 240000004859 Gamochaeta purpurea Species 0.000 description 1
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Abstract
The invention discloses a charging device and a charging method. The charging device comprises a high-voltage power supply system used for charging a low-voltage accumulator system and a control unit used for controlling the high-voltage power supply system to provide charging voltage for the low-voltage accumulator system according to the temperature of an environment in which the low-voltage accumulator system is positioned, wherein the high-voltage power supply system is connected with the control unit. When the temperature of the environment in which the low-voltage accumulator system is positioned is higher, the charging voltage of the low-voltage accumulator system is lowered, so that the increase value of the temperature of a battery is lowered so as to lower the side reaction of electrolyte in the battery, reduce the decomposition of the electrolyte, avoid the occurrence of swelling of the battery and enhance the safety performance of the battery; when the temperature of the environment in which the low-voltage accumulator system is positioned is lower, the charging voltage of the low-voltage accumulator system is enhanced, so that the decrease value of the temperature of the battery is lowered so as to avoid the condition of continuously lowering the temperature of the battery due to the fact that the environment is too cold in the temperature, relieve the decrease of the speed of an electrochemical reaction in the battery and enhance the utilization rate of energy; and therefore, the energy is effectively converted into electric energy.
Description
Technical field
The invention belongs to the charging field of low tension battery, be specifically related to a kind of charging device and the charging method of using this charging device charging of battery management system.
Background technology
Present petroleum resources in the world reduce day by day, and incident is the constantly soaring of oil price.Along with progress, people's environmental consciousness of society are more and more stronger, become a target that needing to demand realization urgently so seek a kind of green energy resource that pollutes few and alternative oil.
The electric automobile electrification is as power source, and reduced the pollution of fuel combustion vehicle waste gas to atmospheric environment, also saved oily expense for the driver.Electric automobile more and more obtains the public's approval as a kind of transport facility of environmental protection and energy saving.At present, the main electric power energy-storage units of electric automobile is a high-tension battery, and the energy storage of high-tension battery is appreciable.Simultaneously; Low tension battery is also arranged on the electric automobile; And this low tension battery of 12 volts mainly is responsible for the low-pressure system power supply on the electric automobile; But the finite capacity of its store electrical energy might become the obstacle that limits the electric automobile during traveling distance, so the charging problem of low tension battery also is vital.
In traditional automobile, the electric weight of low tension battery source is to lean on engine rotation to drive small machine generation electric energy to charge to low tension battery.And in electric automobile, generally be to use high-tension battery to pass through direct current and become galvanic transducer (DCDC) and be the low tension battery charging.In the electric automobile during traveling process, low tension battery is in the power consumption state always, is the low tension battery charging so high-tension battery can become the direct current transducer through direct current always.Low tension battery no longer is the obstacle of restriction electric automobile during traveling distance like this.But the low tension battery charging receives Influence of Temperature bigger.No matter what mode the low tension battery in the current electric motor car takes charge, all be a constant voltage values charging of the permission in the charges of this battery.Usually when ambient temperature is high; The heat accumulation that low tension battery produces in charging process can make the temperature of battery raise, and increases the side reaction in the low tension battery, promotes the decomposition of electrolyte; May cause the bag phenomenon that rises of battery, greatly reduce the security performance of battery; When ambient temperature was low, the heat that low tension battery produces in charging process constantly was transmitted in the environment, and the electrochemical reaction in the battery is slow, and capacity usage ratio is low, and the situation that exists low tension battery to be not fully filled.
Summary of the invention
Technical problem to be solved by this invention is to the above-mentioned deficiency that exists in the prior art, and a kind of charging device and charging method are provided.The control unit of the low tension battery system charging voltage of this charging device can effectively be regulated the charging voltage of the low tension battery in the charging process according to low tension battery system ambient temperature of living in, improves the security performance and the capacity usage ratio of battery.
The present invention provides a kind of charging device; Comprise: be used for to low tension battery system charging high voltage supply system, be used for giving the control unit of low tension battery system charging voltage according to the temperature control high voltage supply system of low tension battery system environment of living in; Wherein, said high voltage supply system is connected with said control unit.
Preferably, said charging device also comprises first temperature detecting unit, and said first temperature detecting unit is arranged in the said low tension battery system environment of living in, wherein,
Said first temperature detecting unit is used to detect the temperature of said low tension battery system environment of living in, and detected temperature signal is sent to said control unit.More preferably, said temperature signal sends to said control unit after can convert voltage signal into through temperature sensor.
Preferably, said control unit comprises judge module and voltage control module, and wherein, said high voltage supply system is connected with said voltage control module, and said low tension battery system is connected with said voltage control module; Wherein,
Said judge module is used for giving said voltage control module according to the charging voltage signal of the preset corresponding said low tension battery system ambient temperature of living in of the temperature output of said low tension battery system environment of living in;
Said voltage control module is used to receive the described charging voltage signal of said judge module output, and gives the charging voltage of said low tension battery system according to the said high voltage supply system of said charging voltage signal controlling.
More preferably; Said judge module is used to receive the temperature signal that first temperature detecting unit sends; After receiving said temperature signal in real time; According to the charging voltage signal of the preset corresponding said low tension battery system ambient temperature of living in of the temperature output of low tension battery system environment of living in, said charging voltage signal is exported to said voltage control module with the charging pulse signal;
Said voltage control module is used to receive the described charging pulse signal of said judge module output, and gives the charging voltage of said low tension battery system according to the said high voltage supply system of said charging pulse signal controlling.
Preferably, said voltage control module also comprises second temperature detecting unit, and said second temperature detecting unit is used to detect the temperature of said voltage control module, and detected temperature signal is sent to said voltage control module,
Said voltage control module is used to receive said temperature signal; And judge according to said temperature signal whether said voltage control module works: when said temperature in preset said voltage control module normal working temperature scope, said voltage control module is controlled said voltage control module work; In the said voltage control module normal working temperature scope that said temperature is not being preset, said voltage control module is controlled said voltage control module and is not worked.Voltage control module has effectively realized the overheat protector for self.
Preferably; Said voltage control module is used for judging according to the charging voltage signal of its actual output whether said voltage control module works: in the normal output voltage range of said voltage control module that the charging voltage of said actual output is being preset, said voltage control module is controlled said voltage control module work; In the normal output voltage range of said voltage control module that the charging voltage of said actual output is not being preset, said voltage control module is controlled said voltage control module and is not worked.Voltage control module has effectively realized the overvoltage protection for self.
Preferably, the charging voltage that said voltage control module is given the low tension battery system through pulse width modulating technology (PMW) control high voltage supply system, said voltage control module are that direct current becomes the direct current transducer.
Preferably, said charging device is an electric automobile low tension battery system charging device.
Preferably, said charging device is an electric automobile low tension battery system charging device, and said judge module is entire car controller (VMS), and said high voltage supply system is a high-voltage battery system.
Preferably, said charging voltage is a constant voltage charge voltage.
The present invention also provides the charging method of the above-mentioned charging device charging of a kind of usefulness; Comprise: give the charging of low tension battery system with high voltage supply system; In charging process, give low tension battery system charging voltage with control unit control high voltage supply system according to the temperature of low tension battery system environment of living in.
Charging device provided by the present invention; Ambient temperature of living in is higher when the low tension battery system, reduces the charging voltage of low tension battery system, and the temperature lift-off value of battery is reduced; Thereby the side reaction of electrolyte in the reduction battery; Reduce the decomposition of electrolyte, avoid the battery bag that rises, improved the security performance of battery; Ambient temperature of living in is lower when the low tension battery system; Improve the charging voltage of low tension battery system; The temperature reduction value of battery is reduced, thereby avoid the cold excessively temperature of environment constantly to reduce the temperature of battery, alleviate the reduction of the electrochemical reaction rates in the battery; Improve capacity usage ratio, make energy be effectively converted into electric energy.
Description of drawings
Fig. 1 is the structural representation of the charging device in the embodiment of the invention 1;
Fig. 2 is ambient temperature of living in of the low tension battery in the embodiment of the invention 1 and low tension battery system charging voltage curve chart.
The 1-entire car controller; The 2-direct current becomes the direct current transducer; The 3-high-voltage battery system; 4-low tension battery system; 5-first temperature sensor; 6-second temperature sensor.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with accompanying drawing and embodiment.
Embodiment 1
Present embodiment provides a kind of charging device; As shown in Figure 1; Comprise: be used for to low tension battery system 4 charging high voltage supply system, be used for giving the control unit of low tension battery system 4 charging voltages according to the temperature control high voltage supply system of low tension battery system environment of living in; Wherein, said high voltage supply system is connected with said control unit.When charging for low tension battery system 4,4 chargings have certain influence to low tension battery system 4 ambient temperatures of living in to the low tension battery system.4 ambient temperatures of living in are higher when the low tension battery system, reduce the charging voltage of low tension battery system 4, and the temperature lift-off value of battery is reduced; Thereby the side reaction of electrolyte in the reduction battery; Reduce the decomposition of electrolyte, avoid the battery bag that rises, improved the security performance of battery; 4 ambient temperatures of living in are lower when the low tension battery system; Improve the charging voltage of low tension battery system 4; The temperature reduction value of battery is reduced, thereby avoid the cold excessively temperature of environment constantly to reduce the temperature of battery, alleviate the reduction of the electrochemical reaction rates in the battery; Improve capacity usage ratio, make energy be effectively converted into electric energy.
Preferably; Said charging device also comprises first temperature detecting unit; Said first temperature detecting unit is arranged at said low tension battery system 4 environment of living in; Wherein, said first temperature detecting unit is used to detect the temperature of said low tension battery system 4 environment of living in, and detected temperature signal is sent to said control unit.Preferably, first temperature detecting unit is first temperature sensor 5, and the temperature signal that control unit sends through the temperature sensor that receives can realize monitoring in real time low tension battery system 4 place ambient temperatures.
Preferably, said control unit comprises judge module and voltage control module, and wherein, said high voltage supply system is connected with said voltage control module, and said low tension battery system 4 is connected with said voltage control module; Wherein, said judge module is used for giving said voltage control module according to the charging voltage signal of preset corresponding said low tension battery system 4 ambient temperatures of living in of the temperature output of said low tension battery system 4 environment of living in; Said voltage control module is used to receive the described charging voltage signal of said judge module output, and gives the charging voltage of said low tension battery system 4 according to the said high voltage supply system of said charging voltage signal controlling.Judge module can receive the temperature signal that first temperature sensor 5 sends in real time, and judge module can be according to the low tension battery system that configures 4 ambient temperatures of living in and the charging voltage of coming real-time regulated low tension battery system 4 to the temperature voltage curve chart of the relation between low tension battery system 4 charging voltages like this.As shown in Figure 2, along with the rising of low tension battery system 4 ambient temperatures of living in, the charging voltage that control unit is controlled to low tension battery system 4 reduces among this figure; Along with the reduction of ambient temperature, the charging voltage that control unit is controlled to low tension battery system 4 raises.
More preferably; Said judge module is used to receive the temperature signal that first temperature detecting unit sends; After receiving said temperature signal in real time; According to the charging voltage signal of preset corresponding said low tension battery system 4 ambient temperatures of living in of the temperature of low tension battery system 4 environment of living in output, said charging voltage signal is exported to said voltage control module with the charging pulse signal; Said voltage control module is used to receive the described charging pulse signal of said judge module output, and gives the charging voltage of said low tension battery system 4 according to the said high voltage supply system of said charging pulse signal controlling.
Preferably, said voltage control module also comprises second temperature detecting unit, and said second temperature detecting unit is used to detect the temperature of said voltage control module, and detected temperature signal is sent to said voltage control module; Said voltage control module is used to receive said temperature signal; And judge according to said temperature signal whether said voltage control module works: when said temperature in preset said voltage control module normal working temperature scope, said voltage control module is controlled said voltage control module work; In the said voltage control module normal working temperature scope that said temperature is not being preset, said voltage control module is controlled said voltage control module and is not worked.Preferably, second temperature detecting unit is second temperature sensor 6, and the temperature signal that described voltage control unit sends through second temperature sensor 6 that receives can realize monitoring in real time the temperature of self, reaches the overheat protector function.Voltage control module is originally as an electrical equipment; Because a lot of elements in this electrical equipment all are power components; And heating is big, so need it to have the overheat protector function, monitors self temperature in real time and controls its working in normal preset temperature range; Do not quit work, promptly carry out overheat protector in preset temperature range.
Preferably; Said voltage control module is used for judging according to the charging voltage signal of its actual output whether said voltage control module works: in the normal output voltage range of said voltage control module that the charging voltage of said actual output is being preset, said voltage control module is controlled said voltage control module work; In the normal output voltage range of said voltage control module that the charging voltage of said actual output is not being preset, said voltage control module is controlled said voltage control module and is not worked.Voltage control module this as an electrical equipment, because a lot of component agings or other fortuitous event in this electrical equipment all can take place, so need it to have over-voltage protecting function.
Preferably, said voltage control module is through the charging voltage of pulse width modulating technology control high voltage supply system to low tension battery system 4.
Preferably; Said charging device is electric automobile low tension battery system 4 battery chargers; Said high voltage supply system is a high-voltage battery system 3; Said judge module is an entire car controller 1, and said voltage control module is that direct current becomes direct current transducer 2, and said charging voltage is a constant voltage charge voltage.On electric automobile, entire car controller 1 becomes direct current transducer 2 control high-voltage battery systems 3 through direct current and is 4 chargings of low tension battery system.Wherein, high-voltage battery system 3 is the batteries for the power supply of the high-pressure system of whole electric automobile, and it can be directly charges through the charger interface on the electric automobile and extraneous charging station or family expenses alternating current; It mainly is 14 volts of low pressure that 336 volts of the high pressure of high-voltage battery system 3 converted to low tension battery system 4 that direct current becomes direct current transducer 2; Low tension battery system 4 is the low-pressure system power supply (like car light etc.) on the electric automobile.
Because electric automobile moves in the different environment of being everlasting, so that the charging voltage of the low tension battery system 4 on the electric automobile receives ambient temperature effect is bigger.Entire car controller 1 is received the signal of low tension battery system 4 ambient temperatures of living in that first temperature sensor 5 sends; And according to low tension battery system as shown in Figure 24 ambient temperatures of living in and confirm the voltage that direct current change direct current transducer 2 finally should be exported for the relation curve between low tension battery system 4 charging voltages; Thereby the pulse width modulation voltage signal that provides a duty ratio becomes direct current transducer 2 to direct current; Direct current becomes the parsing of direct current transducer 2 through the pulse-width modulated voltage signal, finally exports the voltage of low tension battery system 4 optimum charging under this temperature.In the charging process along with the variation of low tension battery system 4 place ambient temperatures; The duty ratio of the pulse width modulation voltage signal of entire car controller 1 output is also different, and then has guaranteed in low tension battery system 4 charging processes it is charging under the voltage of optimum charging all the time.The last voltage that indicates of Fig. 2 is that the charges of the low tension battery system 4 in this charging device is interior; And be the constant voltage charge voltage of low tension battery system 4; The value that entire car controller 1 has been regulated the constant voltage charge voltage of low tension battery system 4 according to variations in temperature, low tension battery system 4 is according to the constant voltage charge magnitude of voltage constant voltage charge of regulating.
Direct current on the electric automobile becomes direct current transducer 2 had gentle over-voltage protecting function.Direct current becomes the temperature signal that direct current transducer 2 monitoring in real time second temperature sensor 6 sends; If direct current becomes the temperature of direct current transducer 2 in preset normal working temperature scope; Then direct current change direct current transducer 2 does not send fault-signal, works on; If the temperature of judging direct current change direct current transducer 2 is not in preset normal working temperature scope; Then direct current becomes the control chip that direct current transducer 2 has to himself and sends fault-signal; Control chip quits work, and direct current becomes direct current transducer 2 and quits work, after temperature detection signal is in normal range (NR); Fault-signal disappears, and direct current becomes direct current transducer 2 and works on.Direct current becomes the output voltage signals of direct current transducer 2 monitoring in real time self, if its output voltage in normal output voltage range, then direct current becomes direct current transducer 2 and works on; If the voltage of judging direct current change direct current transducer 2 is not in preset normal output voltage range; Then direct current becomes direct current transducer 2 and sends fault-signal to the internal control chip that himself has; It is out of service that direct current becomes direct current transducer 2 systems; Disappear system restart up to fault-signal.
Present embodiment provides a kind of method of charging, comprising:
Give the low tension battery system 4 chargings with high voltage supply system, in charging process, give low tension battery system 4 charging voltages with control unit control high voltage supply system according to the temperature of environment.
Use the charging method of present embodiment to charge; Higher when low tension battery system 4 ambient temperatures of living in, reduce the charging voltage of low tension battery system 4, the temperature lift-off value of battery is reduced; Thereby the side reaction of electrolyte in the reduction battery; Reduce the decomposition of electrolyte, avoid the battery bag that rises, improved the security performance of battery; 4 ambient temperatures of living in are lower when the low tension battery system; Improve the charging voltage of low tension battery system 4; The temperature reduction value of battery is reduced, thereby avoid the cold excessively temperature of environment constantly to reduce the temperature of battery, alleviate the reduction of the electrochemical reaction rates in the battery; Improve capacity usage ratio, make energy be effectively converted into electric energy.
It is understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For the one of ordinary skilled in the art, under the situation that does not break away from spirit of the present invention and essence, can make various modification and improvement, these modification also are regarded as protection scope of the present invention with improving.
Claims (10)
1. charging device; It is characterized in that; Comprise: be used for to low tension battery system charging high voltage supply system, be used for giving the control unit of low tension battery system charging voltage, wherein according to the temperature control high voltage supply system of low tension battery system environment of living in
Said high voltage supply system is connected with said control unit.
2. according to the said charging device of claim 1, it is characterized in that, also comprise first temperature detecting unit, wherein,
Said first temperature detecting unit is used to detect the temperature of said low tension battery system environment of living in, and detected temperature signal is sent to said control unit.
3. according to claim 1 or 2 said charging devices; It is characterized in that said control unit comprises judge module and voltage control module, wherein; Said high voltage supply system is connected with said voltage control module, and said low tension battery system is connected with said voltage control module; Wherein,
Said judge module is used for giving said voltage control module according to the charging voltage signal of the preset corresponding said low tension battery system ambient temperature of living in of the temperature output of said low tension battery system environment of living in;
Said voltage control module is used to receive the described charging voltage signal of said judge module output, and gives the charging voltage of said low tension battery system according to the said high voltage supply system of said charging voltage signal controlling.
4. according to the said charging device of claim 3; It is characterized in that said voltage control module also comprises second temperature detecting unit, said second temperature detecting unit is used to detect the temperature of said voltage control module; And detected temperature signal sent to said voltage control module
Said voltage control module is used to receive said temperature signal; And judge according to said temperature signal whether said voltage control module works: when said temperature in preset said voltage control module normal working temperature scope, said voltage control module is controlled said voltage control module work; In the said voltage control module normal working temperature scope that said temperature is not being preset, said voltage control module is controlled said voltage control module and is not worked.
5. according to the said charging device of claim 3; It is characterized in that; Said voltage control module is used for judging according to the charging voltage signal of its actual output whether said voltage control module works: in the normal output voltage range of said voltage control module that the charging voltage of said actual output is being preset, said voltage control module is controlled said voltage control module work; In the normal output voltage range of said voltage control module that the charging voltage of said actual output is not being preset, said voltage control module is controlled said voltage control module and is not worked.
6. according to the said charging device of claim 3, it is characterized in that the charging voltage that said voltage control module is given the low tension battery system through pulse width modulating technology control high voltage supply system, said voltage control module are that direct current becomes the direct current transducer.
7. according to any said charging device of claim 1 ~ 6, it is characterized in that it is an electric automobile low tension battery system charging device.
8. according to the said charging device of claim 3, it is characterized in that it is an electric automobile A-battery charging device, said judge module is an entire car controller, and said high voltage supply system is a high-voltage battery system.
9. according to the said charging device of claim 1, it is characterized in that said charging voltage is a constant voltage charge voltage.
10. the charging method with any said charging device charging in the power 1 to 9 is characterized in that, comprising:
Give the charging of low tension battery system with high voltage supply system, in charging process, give low tension battery system charging voltage with control unit control high voltage supply system according to the temperature of low tension battery environment of living in.
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| CN2012103386442A CN102832672A (en) | 2012-09-13 | 2012-09-13 | Charging device and charging method |
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| CN2012103386442A CN102832672A (en) | 2012-09-13 | 2012-09-13 | Charging device and charging method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108054805A (en) * | 2018-01-09 | 2018-05-18 | 杭州快电新能源科技有限公司 | The electric vehicle charge protection system and its charge protection method of a kind of adjustable voltage scope |
| CN111478419A (en) * | 2020-03-18 | 2020-07-31 | 宁波吉利汽车研究开发有限公司 | Charging method and device of super capacitor, electronic equipment and storage medium |
| CN112531817A (en) * | 2020-11-20 | 2021-03-19 | 宝能(广州)汽车研究院有限公司 | Charging control method, device, controller, management system and storage medium |
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| CN112531817A (en) * | 2020-11-20 | 2021-03-19 | 宝能(广州)汽车研究院有限公司 | Charging control method, device, controller, management system and storage medium |
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