CN106160040B - Secondary lithium battery for vehicle - Google Patents
Secondary lithium battery for vehicle Download PDFInfo
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- CN106160040B CN106160040B CN201510160283.0A CN201510160283A CN106160040B CN 106160040 B CN106160040 B CN 106160040B CN 201510160283 A CN201510160283 A CN 201510160283A CN 106160040 B CN106160040 B CN 106160040B
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Abstract
The invention discloses a vehicle secondary lithium battery, which comprises an electric storage unit, a charge/discharge relay, a microprocessor, a control module and an electrode terminal group, wherein the electric storage unit comprises a plurality of battery cells connected in series/parallel, the electrode terminal group comprises a positive electrode terminal and a negative electrode terminal, the charge/discharge relay is electrically connected with the electric storage unit, the charge/discharge relay is further electrically connected with the electrode terminal group, an alternating current/direct current conversion module of a generator in an automobile or a locomotive and electric equipment of the automobile or the locomotive are respectively coupled with the electrode terminal group, the microprocessor is respectively electrically connected with the electric storage unit and the charge/discharge relay, and the microprocessor comprises a charge loop and a discharge loop and is used for detecting the voltage of the electric storage unit and controlling the charge/discharge relay to work; the control module is electrically connected with the electric storage unit and the microprocessor respectively, the control module is further electrically connected with the electrode terminal group, and the microprocessor controls the on/off of the control module.
Description
Technical Field
The present invention relates to a starting battery for an automobile or a locomotive, and more particularly, to a secondary lithium battery for an automobile.
Background
The power supply system of vehicles such as automobiles or locomotives mainly comprises a generator, an AC/DC conversion module and a starting battery, wherein the input end of the AC/DC conversion module is electrically connected with the generator, the output end of the AC/DC conversion module is coupled with the electrode terminal of the starting battery, and the electric equipment of the automobiles or locomotives is coupled with the electrode terminal of the starting battery through an electric lead.
The starting battery mainly provides the electric power needed by the running of a starting motor of the automobile or the locomotive, the running of an engine of the automobile or the locomotive is started through the running of the starting motor, and the running of the engine drives the running of the generator.
As lithium battery technology tends to mature, secondary lithium batteries are gradually applied to starting batteries of automobiles or locomotives; the secondary lithium battery mainly comprises an electric storage unit, a charging circuit, a discharging circuit and a relay, wherein the electric storage unit comprises a plurality of battery cells (cells), the battery cells are connected in series/parallel to form the electric storage unit, the charging circuit and the discharging circuit are respectively electrically connected with the relay, and the charging circuit and the discharging circuit respectively control the on/off of the charging/discharging relay, so that the electric storage unit is charged/discharged.
When the voltage of the electric storage unit is reduced to a rated low voltage value, the discharging circuit controls the relay to be disconnected, the electric storage unit is stopped from discharging outwards, the phenomenon that the service life of the electric storage unit is influenced due to over-discharging of the electric storage unit is avoided, and the over-discharging protection effect is achieved.
When the engine is started, the battery is started to supply power to the starting motor, after the engine is started to run and drives the engine to run and generate power, the generator supplies power to the electric equipment under the condition that the potential difference exists between the generator and the electric storage unit, but the electric storage unit is not discharged, but before the generator runs and generates power, the electric storage unit supplies power to the electric equipment and the starting motor, the electric storage of the electric storage unit is reduced, so that the generator supplies power to charge the electric storage unit, and the stored power of the electric storage unit is recovered to a full state.
When the engine in a flameout state starts to operate, the secondary lithium battery supplies power required by the operation of the starting motor, after the engine operates, the generator operates to supply power to the electric equipment, the secondary lithium battery stops supplying power to the electric equipment, the electric storage of the electric storage unit is reduced, the generator is driven by the engine to operate and generate power, the generator supplies power to the electric equipment and charges the secondary lithium battery, and when the secondary lithium battery recovers the full state of the electric storage, the relay is disconnected, and the electric storage unit stops charging/discharging.
However, in practical use, it is found that, in some cases, when the rechargeable lithium battery recovers the full state of the electric power, the relay is turned off, and the electric power storage unit stops charging/discharging, the ac/dc conversion module also turns off the external discharge, at this time, although the generator keeps running, the electric equipment cannot effectively obtain the power supply from the generator, after a period of time, the ac/dc conversion module is turned on again due to the power demand of the electric equipment, and then the external discharge is resumed, and the electric equipment obtains the power supply from the generator again, although the time for turning off the ac/dc conversion module is very short, a short power shortage phenomenon occurs during the running of the automobile or the locomotive, the service life of the electric equipment is easily reduced, and during the short power shortage time, the power steering wheel operated by the electric power cannot effectively operate, the safety accident of the automobile during running is easily caused.
Disclosure of Invention
The invention mainly aims to provide a secondary lithium battery for a vehicle, which is used for a starting battery of the vehicle or the locomotive.
The invention relates to a vehicle secondary lithium battery, which is a starting battery and comprises an electric storage unit, a charge/discharge relay, a microprocessor, a control module and an electrode terminal group, wherein the electric storage unit comprises a plurality of series/parallel battery cells, the electrode terminal group comprises an anode terminal and a cathode terminal, so that electric power enters/exits the secondary lithium battery through the electrode terminal group, the charge/discharge relay is electrically connected with the electric storage unit, the charge/discharge relay is further electrically connected with the electrode terminal group, an alternating current/direct current conversion module of a generator in an automobile or a locomotive and electric equipment of the automobile or the locomotive are respectively coupled with the electrode terminal group to control the charge/discharge of the electric storage unit, the microprocessor is respectively electrically connected with the electric storage unit and the charge/discharge relay, the microprocessor comprises a charge loop and a discharge loop, the charge/discharge relay is used for detecting the voltage of the electric storage unit and controlling the charge/discharge relay to work;
the control module is respectively electrically connected with the electric storage unit and the microprocessor, the control module is further electrically connected with the electrode terminal group, the microprocessor controls on/off of the control module, and the control module controls the electric storage unit to discharge electricity to the electric equipment;
when the electric storage unit is charged, the control module is switched off, the microprocessor detects the voltage of the electric storage unit, when the electric storage unit is fully charged, the microprocessor controls the charging/discharging relay to be switched off, and the control module is switched on, so that the electric storage unit discharges the electric equipment through the control module;
after the charging/discharging relay is disconnected and the control module is switched on, the microprocessor detects the voltage of the electric storage unit, if the voltage of the electric storage unit is higher than or equal to a third voltage value, the charging/discharging relay is kept disconnected, the control module is kept on, the electric storage unit cannot be charged, if the voltage of the electric storage unit is lower than the third voltage value, the microprocessor controls the charging/discharging relay to be switched on and enables the control module to be disconnected, and the electric storage unit supplies power to the electric equipment through the charging/discharging relay.
When the charging/discharging relay performs overcharge protection and is disconnected, the power storage unit can provide power for the electric equipment through the switching on of the control module, so that the phenomenon of power shortage of the automobile or the locomotive in the running process is avoided, and the reliability of continuous working of the electric equipment and the running safety of the automobile or the locomotive are improved.
Drawings
FIG. 1 is a block diagram of an embodiment of the present invention and a circuit of a generator and an electric device;
fig. 2 is a flowchart of the operation of the embodiment of the present invention.
Description of reference numerals: 1-an electric storage unit; 2-charge/discharge relay; 3-a microprocessor; 5-a control module; 6-electrode terminal group; 8-a generator; and 9-electric equipment.
Detailed Description
As shown in fig. 1, the embodiment of the lithium secondary battery for vehicle according to the present invention includes an electric storage unit 1, a charge/discharge relay 2, a microprocessor 3, a control module 5 and an electrode terminal set 6, wherein the lithium secondary battery for vehicle is a starting battery of a vehicle or a locomotive, the electric storage unit 1 mainly includes a plurality of battery cells, each battery cell is connected in series/parallel to form the electric storage unit 1, the electrode terminal set 6 includes a positive terminal and a negative terminal, so that electric power enters/exits the lithium secondary battery through the electrode terminal set 6, the charge/discharge relay 2 is electrically connected to the electric storage unit 1, the charge/discharge relay 2 is further electrically connected to the electrode terminal set 6, an ac/dc conversion module of a generator 8 in the vehicle or the locomotive and an electric device 9 of the vehicle or the locomotive are respectively coupled to the electrode terminal set 6 to control charge/discharge of the electric storage unit 1, the microprocessor 3 is electrically connected with the power storage unit 1 and the charge/discharge relay 2 respectively, and the microprocessor 3 comprises a charge circuit and a discharge circuit and is used for detecting the voltage of the power storage unit 1 and controlling the charge/discharge relay 2 to work, so that the excessive charge/discharge of the power storage unit 1 is avoided, and the power storage unit 1 is protected.
The control module 5 can select a relay or a Metal Oxide Semiconductor Field Effect Transistor (MOSFET), the control module 5 is electrically connected with the electric storage unit 1 and the electrode terminal group 6 respectively to form a one-way loop, the control module 5 is further electrically connected with the microprocessor 3, the microprocessor 3 controls the on/off of the control module 5, and the control module 5 controls the electric storage unit 1 to discharge electricity utilization equipment 9 through the one-way loop.
In a general case, the charge/discharge relay 2 is in an on state, the control module 5 is in an off state, and the secondary lithium battery for a vehicle can supply electric power to the electric equipment 9. When the engine of the automobile or the locomotive is started to operate from a flameout state, the secondary lithium battery for the automobile provides electric power to enable the starting motor of the automobile or the locomotive to operate. After the engine is started, the engine drives the generator 8 to operate and generate power, because the voltage of the generator 8 is higher than the voltage of the vehicle secondary lithium battery, the potential difference between the generator 8 and the vehicle secondary lithium battery enables the generator 8 to supply power to the electric equipment 9, and although the charge/discharge relay 2 is kept on, the vehicle secondary lithium battery does not supply power to the electric equipment 9; when the engine is started, the lithium secondary battery for vehicle supplies electric power to start the engine, so that the electric power storage of the lithium secondary battery for vehicle is reduced, and the generator 8 supplies electric power to charge the lithium secondary battery for vehicle after operation.
As shown in fig. 1 and 2, when the generator 8 charges the storage unit 1 in the secondary lithium battery for the vehicle, the control module 5 keeps the off state, the microprocessor 3 detects the voltage of the storage unit 1, and determines whether the storage unit 1 is charged to saturation by detecting whether the voltage of each battery cell in the storage unit 1 is higher than a first voltage value and whether the total voltage of the storage unit 1 is higher than a second voltage value, wherein the first voltage value is determined by the saturation voltage of each battery cell, and the second voltage value is determined by the saturation voltage of each battery cell; if the voltage of any battery cell is not higher than the first voltage value or the total voltage of the electric storage unit 1 is not higher than the second voltage value, the charge/discharge relay 2 is kept turned on to continuously charge the electric storage unit 1. The first voltage value may be, but is not limited to, 3.65V and the second voltage value may be, but is not limited to, 14.6V.
When the electric storage unit 1 is charged, if the voltage of each battery cell is higher than the first voltage value and the total voltage of the electric storage unit 1 is higher than the second voltage value, it indicates that the electric storage unit 1 is fully charged, the microprocessor 3 controls the charging/discharging relay 2 to be switched off, the control module 5 is switched on, the charging/discharging relay 2 is switched off to avoid the electric storage unit 1 from being overcharged, so as to achieve the function of overcharge protection, the control module 5 is switched on, and the electric storage unit 1 can discharge electricity to the electric equipment 9 through the control module 5, therefore, even if the alternating current/direct current conversion module of the generator 8 is switched off to discharge the electricity to the outside, the electric equipment 9 can be supplied with the power by the vehicle-used secondary lithium battery, so that the phenomenon that an automobile or a locomotive is lack of electricity in the driving process is avoided, and the reliability.
After the charging of the power storage unit 1 is completed, the microprocessor 3 controls the charging/discharging relay 2 to be switched off to execute the overcharge protection, and after the control module 5 is switched on, the microprocessor 3 detects the voltage of the power storage unit 1; if the voltage of the electric storage unit 1 is higher than or equal to a preset third voltage value, the charge/discharge relay 2 is kept disconnected, the control module 5 is kept turned on, so that the electric storage unit 1 cannot be charged, the phenomenon that the electric storage unit 1 starts to be charged to cause over-charging is avoided, and the electric storage unit 1 is continuously subjected to over-charging protection; if the voltage of the power storage unit 1 is lower than a third voltage value, the microprocessor 3 controls the charge/discharge relay 2 to be switched on and switches off the control module 5, power can enter and exit the power storage unit 1 through the charge/discharge relay 2, so that the power storage unit 1 can supply power to the electric equipment 9 through the charge/discharge relay 2, the generator 8 can charge the power storage unit 1 through the charge/discharge relay 2, the third voltage value is lower than the second voltage value, and the third voltage value can be set according to the saturated storage capacity of the power storage unit 1 and the power consumption of the electric equipment 9 in unit time.
The invention adds the control module 5 outside the charging/discharging loop formed by the existing charging/discharging relay 2 to form a unidirectional loop which can only discharge, so that when the charging/discharging relay 2 executes overcharge protection and is disconnected, the control module 5 is switched on, the power storage unit 1 supplies power to the electric equipment 9, the phenomenon of power shortage of the automobile or the locomotive in the driving process is avoided, and the reliability of continuous work of the electric equipment 9 and the driving safety of the automobile or the locomotive are improved.
Claims (1)
1. A vehicle secondary lithium battery, which is a starting battery, is characterized by comprising an electric storage unit, a charge/discharge relay, a microprocessor, a control module and an electrode terminal group, wherein the electric storage unit comprises a plurality of series/parallel battery cells, the electrode terminal group comprises a positive terminal and a negative terminal, so that electric power enters/exits the secondary lithium battery through the electrode terminal group, the charge/discharge relay is electrically connected with the electric storage unit, the charge/discharge relay is further electrically connected with the electrode terminal group, an AC/DC conversion module of a generator in an automobile or a locomotive and electric equipment of the automobile or the locomotive are respectively coupled with the electrode terminal group to control the charge/discharge of the electric storage unit, the microprocessor is respectively electrically connected with the electric storage unit and the charge/discharge relay, the microprocessor comprises a charging circuit and a discharging circuit, and is used for detecting the voltage of the electric storage unit and controlling the charging/discharging relay to work;
the control module is respectively electrically connected with the electric storage unit and the microprocessor, the control module is further electrically connected with the electrode terminal group, the microprocessor controls on/off of the control module, and the control module controls the electric storage unit to discharge electricity to the electric equipment;
when the electric storage unit is charged, the control module is switched off, the microprocessor detects the voltage of the electric storage unit, when the electric storage unit is fully charged, the microprocessor controls the charging/discharging relay to be switched off, and the control module is switched on, so that the electric storage unit discharges the electric equipment through the control module;
after the charging/discharging relay is disconnected and the control module is switched on, the microprocessor detects the voltage of the electric storage unit, if the voltage of the electric storage unit is higher than or equal to a third voltage value, the charging/discharging relay is kept disconnected, the control module is kept on, the electric storage unit cannot be charged, if the voltage of the electric storage unit is lower than the third voltage value, the microprocessor controls the charging/discharging relay to be switched on and enables the control module to be disconnected, and the electric storage unit supplies power to the electric equipment through the charging/discharging relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510160283.0A CN106160040B (en) | 2015-04-07 | 2015-04-07 | Secondary lithium battery for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510160283.0A CN106160040B (en) | 2015-04-07 | 2015-04-07 | Secondary lithium battery for vehicle |
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| Publication Number | Publication Date |
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| CN106160040A CN106160040A (en) | 2016-11-23 |
| CN106160040B true CN106160040B (en) | 2021-01-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201510160283.0A Active CN106160040B (en) | 2015-04-07 | 2015-04-07 | Secondary lithium battery for vehicle |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137235A (en) * | 1992-10-28 | 1994-05-17 | Secoh Giken Inc | Load current-carrying control device by battery for internal combustion engine running object |
| CN1440583A (en) * | 2000-05-08 | 2003-09-03 | 新晖贸易有限公司 | Intelligent switch for battery |
| CN1918768A (en) * | 2004-02-16 | 2007-02-21 | 卡特姆·德维勒克有限责任公司 | Vehicle power grid comprising battery independent buffering of the generator current |
| CN101976856A (en) * | 2010-06-02 | 2011-02-16 | 张家港思达企业管理有限公司 | Lithium battery starting accumulator for intelligent vehicle |
| CN102862471A (en) * | 2011-07-04 | 2013-01-09 | 上海华普汽车有限公司 | Charging device and charging method of hybrid car |
| CN103326080A (en) * | 2012-03-23 | 2013-09-25 | 三星Sdi株式会社 | Battery pack and method of controlling the same |
| JP2015046992A (en) * | 2013-08-28 | 2015-03-12 | 日産自動車株式会社 | Vehicle power supply device |
-
2015
- 2015-04-07 CN CN201510160283.0A patent/CN106160040B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06137235A (en) * | 1992-10-28 | 1994-05-17 | Secoh Giken Inc | Load current-carrying control device by battery for internal combustion engine running object |
| CN1440583A (en) * | 2000-05-08 | 2003-09-03 | 新晖贸易有限公司 | Intelligent switch for battery |
| CN1918768A (en) * | 2004-02-16 | 2007-02-21 | 卡特姆·德维勒克有限责任公司 | Vehicle power grid comprising battery independent buffering of the generator current |
| CN101976856A (en) * | 2010-06-02 | 2011-02-16 | 张家港思达企业管理有限公司 | Lithium battery starting accumulator for intelligent vehicle |
| CN102862471A (en) * | 2011-07-04 | 2013-01-09 | 上海华普汽车有限公司 | Charging device and charging method of hybrid car |
| CN103326080A (en) * | 2012-03-23 | 2013-09-25 | 三星Sdi株式会社 | Battery pack and method of controlling the same |
| JP2015046992A (en) * | 2013-08-28 | 2015-03-12 | 日産自動車株式会社 | Vehicle power supply device |
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| CN106160040A (en) | 2016-11-23 |
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