CN109204060B - Safety control device for battery pack of electric vehicle - Google Patents
Safety control device for battery pack of electric vehicle Download PDFInfo
- Publication number
- CN109204060B CN109204060B CN201811057292.7A CN201811057292A CN109204060B CN 109204060 B CN109204060 B CN 109204060B CN 201811057292 A CN201811057292 A CN 201811057292A CN 109204060 B CN109204060 B CN 109204060B
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- battery pack
- switch
- relay
- vehicle
- charging
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- 238000007599 discharging Methods 0.000 claims abstract description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
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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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- H02J7/0026—
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Transportation (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention discloses a safety control device for a battery pack of an electric vehicle, which comprises a power battery pack, a relay, a switch loop, a charging loop and an emergency switch, wherein the power battery pack is connected with the relay; the switch loop is connected with the vehicle key switch and used for transmitting a switch signal of a vehicle key; the charging loop is used for transmitting a charging signal for charging the battery pack; the switch loop and the charging loop are both connected to the control part of the relay; the switch part of the relay is connected to the power battery pack; one end of the emergency switch is connected to the control part of the relay, and the other end of the emergency switch is connected to a 12V direct-current storage battery in the vehicle body; and the relay is used for controlling the power battery pack to enter a working state and carry out charging and discharging. On the basis of the original new energy vehicle, the battery pack safety control device is added between the power battery packs, so that the normal state and the safety of the power battery packs during parking and charging are ensured.
Description
Technical Field
The invention relates to the technical field of battery safety, in particular to a safety control device for a battery pack of an electric vehicle.
Background
The battery pack formed by connecting the lithium ion single batteries in series, in parallel or in series-parallel is widely applied to various electric vehicles, such as electric bicycles, electric motorcycles and electric automobiles, and is used for providing power for the electric vehicles and also can be called as a power battery pack; therefore, the safety and the service life of the power battery pack are key core technologies of the battery pack.
With the continuous development of new energy vehicles, the types and the number of the new energy vehicles in the market are continuously increased, and in order to ensure the safety of the whole vehicle, the safety performance of the vehicle in the driving process is ensured, and the safety of the vehicle in the parking and charging processes is also ensured; some vehicles can have faults of both a vehicle key and a charging loop after being parked for a long time, so that the power battery pack can not provide power; sometimes, the phenomenon of mistakenly electrifying the 12V storage battery in the vehicle can also occur when the power battery pack is charged. In order to solve the problems, a battery pack safety control device is added between power battery packs on the basis of an original new energy vehicle, so that the normal state and the safety of the power battery packs during parking and charging are guaranteed.
Disclosure of Invention
Aiming at the current requirements and the defects of the prior art development, the invention provides a safety control device for a battery pack of an electric vehicle, which ensures the normal state and safety of a power battery pack during parking and charging.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a safety control device for a battery pack of an electric vehicle, which comprises: the emergency charging system comprises a power battery pack, a relay, a switch loop, a charging loop and an emergency switch;
the switch loop is connected with the vehicle key switch and used for transmitting a switch signal of a vehicle key;
the charging loop is used for transmitting a charging signal for charging the battery pack;
the switch loop and the charging loop are both connected to the control part of the relay; the switch part of the relay is connected to the power battery pack;
one end of the emergency switch is connected to the control part of the relay, and the other end of the emergency switch is connected to a 12V direct-current storage battery in the vehicle body;
and the relay is used for controlling the power battery pack to enter a working state and carry out charging and discharging.
Preferably, the power battery pack comprises a plurality of single batteries connected in series and is used for supplying power to the power mechanism in the vehicle.
Preferably, the switch circuit comprises a light emitting diode D2 and a diode D3, wherein the cathode of the light emitting diode D2 is connected with the anode of the diode D3, and the anode of the light emitting diode D2 is connected with a vehicle key switch.
Preferably, the charging circuit comprises a transformer and a light emitting diode D1; one end of the transformer is connected with an AC220V power supply, the other end of the transformer outputs direct current 12V for converting the AC220V power supply into the direct current 12V, and one end of the transformer outputting the direct current 12V is connected with the anode of the light emitting diode D1.
Preferably, the cathode of the diode D3 and the cathode of the light emitting diode D1 are connected to the control part of the relay.
Preferably, the relay is a 12V/200A relay.
Preferably, the emergency switch is arranged in the vehicle body and is a manual button switch; the emergency starting device is used for starting a vehicle emergently by closing the emergency switch when a vehicle key switch and a charging loop are both in failure.
Preferably, a protection element is connected in series with a power supply loop of the power battery pack.
Preferably, the protection element is a fuse having a blowing current of 300A.
The invention has the beneficial effects that:
the safety control device for the battery pack is arranged in the vehicle, and is mainly applied to safety control of the power battery pack during parking and charging of the vehicle, so that the normal state and safety of the power battery pack during parking and charging are ensured; the relay control is added, so that the switching and control of the vehicle key switch signal and the charging signal to the power battery pack are realized; the emergency switch is added, so that the power battery pack cannot be started by other circuits under the condition that the vehicle is parked for a long time, and the 12V storage battery in the vehicle supplies power to the vehicle by adopting the emergency switch, so that the purpose of starting the vehicle is achieved; a protection element is added in the power battery pack, so that a battery pack loop is cut off instantly for the occurrence of short-circuit faults when a vehicle runs and stops, and the power supply safety of the power battery pack is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a safety control device for a battery pack of an electric vehicle according to the present invention.
The reference numbers in the drawings are as follows:
100 is a power battery pack, 200 is a switch loop, 201 is a vehicle key switch, 300 is a charging loop, 301 is a transformer, and 400 is an emergency switch.
Detailed Description
The following detailed description of embodiments of the invention is provided in connection with the accompanying drawings and examples:
the first embodiment is as follows: as shown in fig. 1, a safety control device for a battery pack of an electric vehicle according to the present invention includes: a power battery pack 100, a relay, a switch loop 200, a charging loop 300 and an emergency switch 400;
the switch loop 200 is connected with a vehicle key switch 201 and is used for transmitting a switch signal of a vehicle key;
the charging loop 300 is configured to transmit a charging signal for charging the battery pack;
the switch circuit 200 and the charging circuit 300 are both connected to the control part of the relay; the switch part of the relay is connected to the power battery pack 100;
one end of the emergency switch 400 is connected to the control part of the relay, and the other end of the emergency switch is connected to a 12V direct-current storage battery in the vehicle body;
and the relay is used for controlling the power battery pack 100 to enter a working state and charge and discharge.
Example two: another safety control apparatus for a battery pack of an electric vehicle of the present invention includes: a power battery pack 100, a relay, a switch loop 200, a charging loop 300 and an emergency switch 400;
the switch loop 200 is connected with a vehicle key switch 201 and is used for transmitting a switch signal of a vehicle key;
the charging loop 300 is configured to transmit a charging signal for charging the battery pack;
the switch circuit 200 and the charging circuit 300 are both connected to the control part of the relay; the switch part of the relay is connected to the power battery pack 100;
one end of the emergency switch 400 is connected to the control part of the relay, and the other end of the emergency switch is connected to a 12V direct-current storage battery in the vehicle body; the emergency switch 400 is arranged in the vehicle body and is a manual button switch; which is used to emergency start the vehicle by closing the emergency switch 400 when both the vehicle key switch 201 and the charging circuit 300 fail.
And the relay is used for controlling the power battery pack 100 to enter a working state and charge and discharge. Specifically, the relay is connected in the power battery pack 100, and after the relay is electrically closed, the power battery pack 100 can normally work to supply power to the whole vehicle.
The power battery pack 100 includes a plurality of series-connected single batteries for supplying power to a power mechanism in the vehicle.
The switch circuit 200 comprises a light emitting diode D2 and a diode D3, wherein the cathode of the light emitting diode D2 is connected with the anode of a diode D3, and the anode of a light emitting diode D2 is connected with a vehicle key switch 201; specifically, the switching signal of the vehicle key transmitted by the switching circuit 200 is a 12V power signal, and the 12V power signal is also supplied with power by a 12V dc battery in the vehicle.
The charging circuit 300 comprises a transformer 301 and a light emitting diode D1; one end of the transformer 301 is connected with an AC220V power supply, the other end outputs a direct current 12V for converting the AC220V power supply into the direct current 12V, and one end of the transformer 301 outputting the direct current 12V is connected with the cathode of the light emitting diode D1. The cathode of the diode D3 and the cathode of the light-emitting diode D1 are connected to the control part of the relay; the relay is a 12V/200A relay.
A power supply loop of the power battery pack 100 is connected with a protection element in series; the protection element is a fuse, and the fusing current of the fuse is 300A.
As an implementation manner, the relay in this embodiment is a normally open relay of JD1914 model manufactured by RUIKE, and the LEDs D1 and D2 are both LEDs manufactured by Risym; diode D3 was a diode model IN4742 from Zodiac; the transformer 301 is a 22V to 12V transformer from camier.
As shown in fig. 1, the relay in the present apparatus is represented by a relay K1.
The working principle of the safety control device is as follows: when the vehicle key switch 201 is turned on, the switch loop 200 is conducted, the light emitting diode D2 and the diode D3 are conducted in the forward direction, the relay K1 receives a control signal, the switch part of the relay K1 is closed, the power battery pack 100 is driven to be electrified in a high voltage, and the vehicle achieves the purpose of running.
When the vehicle key switch 201 is turned off, the switch loop 200 is disconnected, the control part of the relay K1 is powered off, the power battery pack 100 is powered off at high voltage, and at the moment, when the vehicle is parked for a long time, the power battery pack 100 does not have high-voltage output, so that the safety of the vehicle is ensured.
When the AC220V is used for charging the vehicle, after the external plug is connected, the charging loop 300 is conducted, the transformer 301 converts the AC220V power supply into the direct current of 12V and outputs the direct current to the relay K1, and at the moment, the light-emitting diode D1 is conducted in the forward direction, which indicates that the power battery pack 100 is in a charging state; the control part of the relay K1 is electrified, the switch part is closed, and the power battery pack 100 is electrified at high voltage to charge the whole vehicle; the diode D3 designed in the switch circuit 200 makes the car key switch 201 signal conduct in one direction, and in the process of charging the power battery pack 100, the power supply line connection with the 12V storage battery of the original car is blocked, so that the phenomenon that the 12V electric equipment in the car is electrified by mistake is avoided.
The emergency switch 400 is designed on the device, and the purpose is that when the switch loop 200 of the vehicle key switch 201 fails and the vehicle cannot be started, the emergency switch 400 is pressed, the 12V storage battery of the original vehicle can electrify the electric equipment, the control part of the relay K1 is electrified, the switch part is closed, and the power battery pack 100 is electrified, so that the purpose of starting the vehicle is achieved, and the vehicle can keep normal running under special conditions.
The above shows only the preferred embodiments of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.
Claims (5)
1. An electric vehicle battery pack safety control device, characterized by comprising: the emergency power supply comprises a power battery pack (100), a relay, a switch loop (200), a charging loop (300) and an emergency switch (400);
the switch loop (200) is connected with a vehicle key switch (201) and is used for transmitting a switch signal of a vehicle key; the switch loop (200) comprises a light-emitting diode D2 and a diode D3, wherein the cathode of the light-emitting diode D2 is connected with the anode of a diode D3, and the anode of a light-emitting diode D2 is connected with a vehicle key switch (201);
the charging loop (300) is used for transmitting a charging signal for charging the battery pack; the charging circuit (300) comprises a transformer (301) and a light emitting diode D1; one end of the transformer (301) is connected with an AC220V power supply, the other end of the transformer outputs 12V direct current for converting the AC220V power supply into 12V direct current, and one end of the transformer (301) outputting 12V direct current is connected with the anode of the light emitting diode D1; the cathode of the diode D3 and the cathode of the light-emitting diode D1 are connected to the control part of the relay;
switch circuit (200) and charging circuit (300) all are connected to the control part of relay, specifically include: the cathode of the diode D3 and the cathode of the light-emitting diode D1 are connected to the control part of the relay; the switch part of the relay is connected to a power battery pack (100);
one end of the emergency switch (400) is connected to the control part of the relay, and the other end of the emergency switch is connected to a 12V direct-current storage battery in the vehicle body; the emergency switch (400) is arranged in the vehicle body and is a manual button switch; the emergency starting device is used for starting a vehicle emergently by closing the emergency switch (400) when both the vehicle key switch (201) and the charging circuit (300) are in failure;
and the relay is used for controlling the power battery pack (100) to enter a working state to carry out charging and discharging.
2. The safety control device of the battery pack of the electric vehicle as claimed in claim 1, wherein the power battery pack (100) comprises a plurality of single batteries connected in series for supplying power to a power mechanism in the vehicle.
3. The safety control device for battery pack of electric vehicle as claimed in claim 1, wherein the relay is a 12V/200A relay.
4. The safety control device for the battery pack of the electric vehicle as claimed in claim 1, wherein a protection element is connected in series with a power supply loop of the power battery pack (100).
5. The safety control device for battery pack of electric vehicle as claimed in claim 4, wherein the protection element is a fuse having a blowing current of 300A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057292.7A CN109204060B (en) | 2018-09-11 | 2018-09-11 | Safety control device for battery pack of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811057292.7A CN109204060B (en) | 2018-09-11 | 2018-09-11 | Safety control device for battery pack of electric vehicle |
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| CN109204060A CN109204060A (en) | 2019-01-15 |
| CN109204060B true CN109204060B (en) | 2022-05-17 |
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| CN201811057292.7A Active CN109204060B (en) | 2018-09-11 | 2018-09-11 | Safety control device for battery pack of electric vehicle |
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| CN107994631A (en) * | 2017-11-30 | 2018-05-04 | 北京新能源汽车股份有限公司 | Emergency power-on circuit and method and automobile |
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|---|---|---|---|---|
| CN2420772Y (en) * | 2000-04-26 | 2001-02-21 | 缑泽川 | Common charger for battery and lead accumulator |
| CN101931253A (en) * | 2010-08-31 | 2010-12-29 | 重庆长安汽车股份有限公司 | CAN bus-based pure electric vehicle charging method and system |
| CN202145577U (en) * | 2011-07-19 | 2012-02-15 | 东风汽车股份有限公司 | Pure electric vehicle charging control logic protection circuit |
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| CN109204060A (en) | 2019-01-15 |
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