CN110562095A - Electric automobile, battery voltage regulating circuit and method - Google Patents
Electric automobile, battery voltage regulating circuit and method Download PDFInfo
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- CN110562095A CN110562095A CN201910748765.6A CN201910748765A CN110562095A CN 110562095 A CN110562095 A CN 110562095A CN 201910748765 A CN201910748765 A CN 201910748765A CN 110562095 A CN110562095 A CN 110562095A
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- battery module
- normally open
- power supply
- contact
- battery
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
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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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/18—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries of two or more battery modules
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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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
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention provides an electric automobile, a battery voltage regulating circuit and a method, wherein the voltage regulating circuit comprises a power supply, a conversion circuit and a switch J1, the power supply comprises a plurality of battery modules, the power supply comprises a normal output state and a quick charging state, the conversion circuit changes the overall voltage of the power supply by changing the connection mode of the battery modules, and the switch J1 changes the state of the power supply. According to the invention, the power supply is changed into a quick charging state during charging, so that the overall voltage of the power supply is reduced, and the voltage of the power battery of the electric automobile can accord with the charging voltage range of the charging pile for charging; the power supply is changed into a normal output state during normal use, the voltage value of the power battery of the electric automobile during normal use is not affected, and therefore the universality of the product is improved.
Description
Technical Field
The invention relates to the field of batteries, in particular to an electric automobile, a battery voltage regulating circuit and a battery voltage regulating method.
Background
The electric automobile is a vehicle which takes a vehicle-mounted power supply as power and drives wheels by a motor to run, meets various requirements of road traffic and safety regulations, has a smaller influence on the environment compared with the traditional automobile, has a wide prospect, but is immature in the current technology, and has the main reason of limiting the development of the electric automobile in terms of battery endurance mileage and charging problem.
In order to reduce the charging time problem of the electric automobile during charging, the electric automobile is expected to support a quick charging mode, but the quick charging pile has an allowable charging voltage range, and when the battery voltage of the electric automobile is not within the allowable charging range of the quick charging pile, for example, the allowable charging range of the quick charging pile is 200V-450V, if the power battery voltage of the electric automobile is higher than 450V, the electric automobile cannot be charged through quick charging, so that the charging time is increased, and the experience of people is also reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an electric automobile, a battery voltage regulating circuit and a battery voltage regulating method, so that the voltage of a power battery of the electric automobile can meet the charging voltage range of a charging pile for charging, and the universality of a product is improved.
The purpose of the invention is realized by the following technical scheme:
In a first aspect, the present invention provides a battery voltage regulating circuit, which includes a power supply, a converting circuit and a switch J1, wherein the power supply includes a plurality of battery modules, the power supply includes a normal output state and a fast charging state, the converting circuit changes the overall voltage of the power supply by changing the connection mode of the battery modules, and the switch J1 changes the state of the power supply.
Further, the conversion circuit includes a relay including a plurality of contact switches, and the change in the state of the relay changes the connection manner of the battery module, thereby switching the state of the power supply.
Further, the power supply includes a battery module V1, a battery module V2, a battery module V3, and a battery module V4.
Further, the relay comprises a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open/normally closed contact, a KM4 normally open contact and a KM5 normally open contact, wherein the positive electrode of the battery module V4 is connected with one end of the KM3 normally open contact and the common end is connected with the positive electrode terminal of the power supply, the negative electrode of the battery module V4 is connected with one end of the KM3 normally closed contact and the common end is connected with one end of the KM5 normally open contact, the other end of the KM3 normally closed contact is connected with the other end of the KM3 normally open contact and the common end is connected with the positive electrode of the battery module V3, the negative electrode of the battery module V3 is connected with the positive electrode of the battery module V2 and the common end is connected with the other end of the KM5 normally open contact, one end of the KM4 normally open contact and the ground, the negative electrode of the battery module V35, the other end of KM2 normally closed contact is connected the other end of KM4 normally open contact and public end are connected battery module V1's positive pole, battery module V1's negative pole is connected the other end of KM2 normally open contact and the one end of KM1 normally open contact and the one end of KM1 normally closed contact are connected to public end, the negative terminal that charges fast is connected to the other end of KM1 normally open contact, the other end of KM1 normally closed contact connects the one end of switch J1, the negative terminal of power is connected to the one end of switch J1.
Further, the relay comprises a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact and a KM3 normally open contact, wherein the positive electrode of the battery module V4 is connected with the positive electrode terminal of the power supply, the negative electrode of the battery module V4 is connected with the positive electrode of the battery module V3, the negative electrode of the battery module V3 is connected with the positive electrode of the battery module V2 and the common end is connected with one end of the KM3 normally open contact and the ground, the negative electrode of the battery module V2 is connected with one end of the KM2 normally open contact and the common end is connected with one end of the KM2 normally closed contact, the other end of the KM2 normally closed contact is connected with the other end of the KM3 normally open contact and the common end is connected with the positive electrode of the battery module V1, the negative electrode of the battery module V8 is connected with the other end of the KM2 normally open contact and the common end of the KM1 and one end of the KM, the other end of the KM1 normally-closed contact is connected with one end of a switch J1, and one end of the switch J1 is connected with a negative terminal of a power supply.
Further, the power supply includes a battery module V1, a battery module V2, a battery module V3, a battery module V4, a battery module V5, and a battery module V6.
further, the relay comprises a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open/normally closed contact, a KM4 normally closed contact and a KM5 normally open contact, wherein the positive electrode of the battery module V6 is connected with the positive electrode terminal of the power supply, the negative electrode of the battery module V6 is connected with the positive electrode of the battery module V5, the battery module is connected with the positive electrode of the battery module V4, the common end of the battery module V3 is connected with one end of the KM3 normally open contact, the negative electrode of the battery module V4 is connected with one end of the KM3 normally closed contact, the common end of the battery module V4 is connected with one end of the KM5 normally open contact, the other end of the KM3 normally closed contact is connected with the other end of the KM3 normally open contact, the common end of the battery module V3, the negative electrode of the battery module V63, One end and the ground of KM4 normally open contact, battery module V2's negative pole is connected KM2 normally open contact's one end and common terminal connection KM2 normally closed contact's one end, KM2 normally closed contact's the other end is connected KM4 normally open contact's the other end and common terminal connection battery module V1's positive pole, battery module V1's negative pole is connected KM2 normally open contact's the other end and common terminal connection KM1 normally open contact's one end and KM1 normally closed contact's one end, KM1 normally open contact's the other end is connected the quick charge negative terminal, KM1 normally closed contact's the other end connection switch J1's one end, the negative terminal of power is connected to switch J1's one end.
In a second aspect, the present invention further provides a battery voltage adjusting method, where the battery voltage adjusting method is implemented by the battery voltage adjusting circuit of the first aspect, and includes the following steps: s1: selecting a proper battery voltage regulating circuit for a power supply according to the voltage range which can be provided by the charging equipment; s2: when charging is needed, the power supply is changed from a normal output state to a charging state; the battery voltage is regulated to a voltage range that the charging device can provide.
Further, the step S2 specifically includes the following steps: s1, disconnecting the J1 switch on the normal output circuit of the power supply, changing the state of the relay, and changing the states of all contacts of the relay; s2: the contact state change of the relay changes the connection relation of the battery modules of the power supply, so that part of the power supply modules in all the power supply modules which are originally connected in series are changed into a parallel connection state, and the overall voltage of the power supply is reduced.
In a third aspect, the present invention further provides an electric vehicle, which includes the battery voltage regulating circuit of the first aspect.
the invention has the beneficial effects that: according to the invention, the power supply is changed into a quick charging state during charging, so that the overall voltage of the power supply is reduced, and the voltage of the power battery of the electric automobile can accord with the charging voltage range of the charging pile for charging; the power supply is changed into a normal output state during normal use, the voltage value of the power battery of the electric automobile during normal use is not affected, and therefore the universality of the product is improved.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
Fig. 1 is a circuit schematic of a first embodiment of the present invention.
fig. 2 is an equivalent circuit schematic of the fast charge state of the first embodiment of the present invention.
Fig. 3 is a circuit schematic of a second embodiment of the present invention.
Fig. 4 is an equivalent circuit schematic of a fast charge state of a second embodiment of the present invention.
Fig. 5 is a circuit configuration diagram of a third embodiment of the present invention.
Fig. 6 is an equivalent circuit schematic of a fast charge state of a third embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
example 1.
As shown in fig. 1 and fig. 2, a battery voltage regulating circuit of this embodiment includes a power supply, a converting circuit and a switch J1, in this embodiment, the rated output voltage of the power supply is 600V, the voltage range provided by the fast charging pile is 250V-450V, the converting circuit includes a relay, the power supply includes a battery module V1, a battery module V2, a battery module V3 and a battery module V4, the voltage value of each battery module is equal to 150V, the relay includes a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open/normally closed contact, a KM4 normally open contact and a KM5 normally open contact, the positive electrode of the battery module V4 is connected to one end of the KM3 normally open contact and the common terminal is connected to the positive electrode terminal of the power supply, the negative electrode of the battery module V4 is connected to one end of the KM3 normally closed contact and the common terminal is connected to one end of the KM5 normally open contact, the other end of the KM3 normally closed contact is connected to the other end of the, the negative pole of battery module V3 connects the positive pole of battery module V2 and the other end of common end connection KM5 normally open contact, KM4 normally open contact's one end and ground, the one end of KM2 normally open contact is connected to the negative pole of battery module V2 and the one end of KM2 normally closed contact is connected to the common end, the other end of KM2 normally closed contact is connected the other end of KM4 normally open contact and the positive pole of battery module V1 is connected to the common end, the other end of KM2 normally open contact is connected to the negative pole of battery module V1 and the one end of KM1 normally open contact and the one end of KM1 normally closed contact are connected to the common end, the other end of KM1 normally open contact is connected to the quick charge negative pole terminal, the other end of KM1 normally closed contact is.
The power supply includes a normal output state and a fast charge state, and in this embodiment, the switch J1 is a twist switch optionally having two positions, one of which implements the normal output state of the power supply and the other implements the fast charge state. The normal output state of the power supply is shown in fig. 1, when the switch J1 is closed, the battery module V1, the battery module V2, the battery module V3 and the battery module V4 are connected in series, and the overall output voltage of the power supply is V1+ V2+ V3+ V4; when the rapid charging is needed, the switch J1 is disconnected, the state of the relay is changed, after the state of the relay is changed, the states of all contacts of the relay are changed, the KM1 normally-open contact, the KM2 normally-open contact, the KM3 normally-open contact, the KM4 normally-open contact and the KM5 normally-open contact are closed, the KM1 normally-closed contact, the KM2 normally-closed contact and the KM3 normally-closed contact are all disconnected, and the relay contacts are equivalent to wires in a circuit, so that an equivalent circuit schematic diagram of a battery regulating circuit in the rapid charging state is shown in fig. 2, wherein a battery module V1 is connected with a battery module V2 in parallel, and the battery module V3 is connected with the battery module V4 in parallel. The overall voltage of the power supply in the fast charging state is V2+ V3= V1+ V4, i.e. only 50% of the normal output state of the power supply.
It should be noted that, in the present embodiment, although not shown in the drawings, it should be understood by those skilled in the art that the common terminal of the switch J1 is connected to the circuit, one terminal is connected to the negative terminal of the power supply to control the on/off of the normal output state of the power supply, the other terminal is connected to the coil of the relay to control the state of the relay, and when the power supply normally outputs, the relay does not operate; when the relay acts, the normal output circuit of the power supply is disconnected.
The implementation method of the embodiment is implemented by the battery voltage regulating circuit of the embodiment, and comprises the following steps: s1: a battery voltage regulating circuit for reducing the battery voltage to 50% is selected for the power supply according to the voltage range (250V-450V) which can be provided by the charging equipment; s2: when charging is needed, the switch J1 is screwed to change the power supply from the normal output state to the charging state; the cell voltage was regulated to 300V.
Wherein, step S2 specifically includes the following steps: s201, turning a J1 switch to a quick charging gear so as to change the state of the relay and change the states of all contacts of the relay; s202: the contact state of the relay is changed to change the connection relation of the battery modules of the power supply, so that part of the power supply modules in all the power supply modules which are connected in series originally are changed into a parallel state (an equivalent circuit diagram is shown in figure 2), the whole voltage of the power supply is reduced to 50% of the original voltage, namely 300V, and the power supply voltage is matched with the voltage provided by the rapid charging pile.
Example 2.
As shown in fig. 3 and 4, a battery voltage regulating circuit of this embodiment includes a power supply, a converting circuit and a switch J1, in this embodiment, a rated output voltage of the power supply is 500V, the converting circuit provided by the fast charging pile is in a voltage range of 250V-450V includes a relay, the power supply includes a battery module V1, a battery module V2, a battery module V3 and a battery module V4, voltage values of the battery modules are equal, the relay includes a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open contact, an anode of the battery module V4 is connected to an anode terminal of the power supply, a cathode of the battery module V4 is connected to an anode of the battery module V3, a cathode of the battery module V3 is connected to an anode of the battery module V2 and a common end is connected to one end of the KM3 normally open contact and ground, a cathode of the battery module V2 is connected to one end of the normally open contact of the KM2 and a common end of, the other end of KM2 normally closed contact is connected the other end of KM3 normally open contact and the positive pole of public end connection battery module V1, the other end of KM2 normally open contact is connected to battery module V1's negative pole and the one end of KM1 normally open contact and the one end of KM1 normally closed contact are connected to the public end, the negative terminal that charges fast is connected to the other end of KM1 normally open contact, the other end of KM1 normally closed contact connects switch J1's one end, the negative terminal of power is connected to switch J1's one end.
The power supply includes a normal output state and a fast charge state, and in this embodiment, the switch J1 is a twist switch optionally having two positions, one of which implements the normal output state of the power supply and the other implements the fast charge state. The normal output state of the power supply is shown in fig. 1, when the switch J1 is closed, the battery module V1, the battery module V2, the battery module V3 and the battery module V4 are connected in series, and the overall output voltage of the power supply is V1+ V2+ V3+ V4; when the quick charging is needed, the switch J1 is disconnected, the state of the relay is changed, after the state of the relay is changed, the states of all contacts of the relay are changed, the KM1 normally open contact, the KM2 normally open contact and the KM3 normally open contact are closed, the KM1 normally closed contact and the KM2 normally closed contact are opened, and the relay contacts are equivalent to wires in a circuit, so that an equivalent circuit schematic diagram of the battery regulating circuit in the quick charging state is shown in fig. 4, wherein a battery module V1 is connected with a battery module V2 in parallel, and the battery module V3 is connected with a battery module V4 in series. The overall voltage of the power supply in the fast charging state is V1+ V3+ V4, i.e. only 75% of the power supply in the normal output state.
It should be noted that, in the present embodiment, although not shown in the drawings, it should be understood by those skilled in the art that the common terminal of the switch J1 is connected to the circuit, one terminal is connected to the negative terminal of the power supply to control the on/off of the normal output state of the power supply, the other terminal is connected to the coil of the relay to control the state of the relay, and when the power supply normally outputs, the relay does not operate; when the relay acts, the normal output circuit of the power supply is disconnected.
The implementation method of the embodiment is implemented by the battery voltage regulating circuit of the embodiment, and comprises the following steps: s1: a battery voltage regulating circuit for reducing the battery voltage to 75% is selected for the power supply according to the voltage range (250V-450V) which can be provided by the charging equipment; s2: when charging is needed, the switch J1 is screwed to change the power supply from the normal output state to the charging state; the cell voltage was regulated to 300V.
Wherein, step S2 specifically includes the following steps: s201, turning a J1 switch to a quick charging gear so as to change the state of the relay and change the states of all contacts of the relay; s202: the contact state of the relay is changed to change the connection relation of the battery modules of the power supply, so that part of the power supply modules in all the power supply modules which are originally connected in series are changed into a parallel state (an equivalent circuit diagram is shown in figure 4), the whole voltage of the power supply is reduced to 75% of the original voltage, namely 375V, and the power supply voltage is matched with the voltage provided by the rapid charging pile.
Example 3.
As shown in fig. 5 and fig. 6, a battery voltage regulating circuit of this embodiment includes a power supply, a conversion circuit and a switch J1, a rated output voltage of the power supply in this embodiment is 900V, the voltage range provided by the fast charging pile is 250V-450V, the conversion circuit includes a relay, the power supply includes a battery module V1, a battery module V2, a battery module V3, a battery module V4, a battery module V5 and a battery module V6, voltage values of each battery module are equal, the relay includes a KM1 normally open/closed contact, a KM2 normally open/closed contact, a KM3 normally open/closed contact, a KM4 normally open contact and a KM5 normally open contact, an anode of the battery module V6 is connected to an anode terminal of the power supply, a cathode of the battery module V6 is connected to an anode of the battery module V5, the battery module is connected to an anode of the battery module V4 and a common terminal is connected to one end of the KM3 normally, the negative electrode of the battery module V4 is connected with one end of a KM3 normally closed contact, the common end of the KM5 normally closed contact is connected with the other end of a KM3 normally open contact, the common end of the KM3 normally closed contact is connected with the positive electrode of a KM3 battery module, the negative electrode of the battery module V3 is connected with the positive electrode of a battery module V2, the common end of the KM5 normally open contact is connected with the other end of a KM5 normally open contact, one end of a KM4 normally open contact is connected with the ground, the negative electrode of the battery module V2 is connected with one end of a KM2 normally open contact, the common end of the battery module V2 is connected with one end of a KM2 normally closed contact, the other end of a KM4 normally open contact is connected with the common end of a battery module V1, the negative electrode of the battery module V1 is connected with the other end of a KM2 normally open contact, the common end of the KM1 normally open, one end of the switch J1 is connected to the negative terminal of the power supply.
The power supply includes a normal output state and a fast charge state, and in this embodiment, the switch J1 is a twist switch optionally having two positions, one of which implements the normal output state of the power supply and the other implements the fast charge state. The normal output state of the power supply is shown in fig. 1, when the switch J1 is closed, the battery module V1, the battery module V2, the battery module V3 and the battery module V4 are connected in series, and the overall output voltage of the power supply is V1+ V2+ V3+ V4; when the quick charging is needed, the switch J1 is disconnected, the state of the relay is changed, after the state of the relay is changed, the states of all contacts of the relay are changed, the KM1 normally open contact, the KM2 normally open contact and the KM3 normally open contact are closed, the KM1 normally closed contact and the KM2 normally closed contact are opened, and the relay contacts are equivalent to wires in a circuit, so that an equivalent circuit schematic diagram of the battery regulating circuit in the quick charging state is shown in fig. 4, wherein a battery module V1 is connected with a battery module V2 in parallel, and the battery module V3 is connected with a battery module V4 in series. The overall voltage of the power supply in the fast charging state is V1+ V3+ V4, i.e. only 1/3 of the power supply in the normal output state.
It should be noted that, in the present embodiment, although not shown in the drawings, it should be understood by those skilled in the art that the common terminal of the switch J1 is connected to the circuit, one terminal is connected to the negative terminal of the power supply to control the on/off of the normal output state of the power supply, the other terminal is connected to the coil of the relay to control the state of the relay, and when the power supply normally outputs, the relay does not operate; when the relay acts, the normal output circuit of the power supply is disconnected.
The implementation method of the embodiment is implemented by the battery voltage regulating circuit of the embodiment, and comprises the following steps: s1: a battery voltage regulating circuit for reducing the battery voltage to 1/3 is selected for the power supply according to the voltage range (250V-450V) which can be provided by the charging equipment; s2: when charging is needed, the switch J1 is screwed to change the power supply from the normal output state to the charging state; the cell voltage was regulated to 300V.
Wherein, step S2 specifically includes the following steps: s201, turning a J1 switch to a quick charging gear so as to change the state of the relay and change the states of all contacts of the relay; s202: the contact state of the relay is changed to change the connection relation of the battery modules of the power supply, so that part of the power supply modules in all the power supply modules which are connected in series originally are changed into a parallel state (an equivalent circuit diagram is shown in figure 6), the whole voltage of the power supply is reduced to 1/3% of the original voltage, namely 300V, and the power supply voltage is matched with the voltage provided by the rapid charging pile.
In the present invention, the battery voltage adjusting circuits provided in embodiments 1 to 3 are used in electric vehicles, and can adjust the battery voltage during charging for electric vehicles with different rated output voltages, thereby providing versatility of electric vehicles.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. a battery voltage regulating circuit is characterized by comprising a power supply, a conversion circuit and a switch J1, wherein the power supply comprises a plurality of battery modules, the power supply comprises a normal output state and a quick charging state, the conversion circuit changes the overall voltage of the power supply by changing the connection mode of the battery modules, and the switch J1 changes the state of the power supply.
2. The battery voltage regulating circuit according to claim 1, wherein said switching circuit comprises a relay including a plurality of contact switches, and wherein said relay state change causes a connection of said battery modules to change, thereby switching a state of said power source.
3. The battery voltage regulating circuit according to claim 2, wherein the power source comprises a battery module V1, a battery module V2, a battery module V3, and a battery module V4.
4. The battery voltage regulating circuit according to claim 3, wherein the relay comprises a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open/normally closed contact, a KM4 normally open contact and a KM5 normally open contact, wherein the positive electrode of the battery module V4 is connected with one end of the KM3 normally open contact and the common end is connected with the positive electrode terminal of the power supply, the negative electrode of the battery module V4 is connected with one end of the KM3 normally closed contact and the common end is connected with one end of the KM5 normally open contact, the other end of the KM3 normally closed contact is connected with the other end of the KM3 normally open contact and the common end is connected with the positive electrode of the battery module V3, the negative electrode of the battery module V3 is connected with the positive electrode of the battery module V2 and the common end is connected with the other end of the KM5 normally open contact, one end of the KM4 normally open contact and the ground, the negative electrode of the battery module V2 is connected with The other end of KM2 normally closed contact is connected the other end of KM4 normally open contact and public end are connected the positive pole of battery module V1, battery module V1's negative pole is connected the other end of KM2 normally open contact and the one end of KM1 normally open contact and the one end of KM1 normally closed contact are connected to public end, the negative terminal that charges fast is connected to the other end of KM1 normally open contact, the other end of KM1 normally closed contact connects the one end of switch J1, the negative terminal of power is connected to the one end of switch J1.
5. The battery voltage regulating circuit according to claim 3, wherein the relay comprises a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open contact, a positive electrode of the battery module V4 is connected to a positive electrode terminal of the power supply, a negative electrode of the battery module V4 is connected to a positive electrode of the battery module V3, a negative electrode of the battery module V3 is connected to a positive electrode of the battery module V2 and a common end is connected to one end of the KM3 normally open contact and ground, a negative electrode of the battery module V2 is connected to one end of the KM2 normally open contact and a common end is connected to one end of the KM2 normally closed contact, another end of the KM2 normally closed contact is connected to another end of the KM3 normally open contact and a common end is connected to a positive electrode of the battery module V1, a negative electrode of the battery module V1 is connected to another end of the KM2 normally open contact and a common end of the KM1 and one, the other end of the KM1 normally open contact is connected with a quick charging negative terminal, the other end of the KM1 normally closed contact is connected with one end of a switch J1, and one end of the switch J1 is connected with a negative terminal of a power supply.
6. The battery voltage regulating circuit according to claim 2, wherein the power source comprises a battery module V1, a battery module V2, a battery module V3, a battery module V4, a battery module V5 and a battery module V6.
7. The battery voltage regulating circuit according to claim 6, wherein the relay comprises a KM1 normally open/normally closed contact, a KM2 normally open/normally closed contact, a KM3 normally open/normally closed contact, a KM4 normally open contact and a KM5 normally open contact, a positive electrode of the battery module V6 is connected to a positive electrode terminal of the power supply, a negative electrode of the battery module V6 is connected to a positive electrode of the battery module V5, the battery module is connected to a positive electrode of the battery module V4 and a common end is connected to one end of the KM3 normally open contact, a negative electrode of the battery module V4 is connected to one end of the KM3 normally closed contact and a common end is connected to one end of the KM5 normally open contact, the other end of the KM3 normally closed contact is connected to the other end of the KM3 contact and a common end is connected to a positive electrode of the battery module V3, a negative electrode of the battery module V3 is connected to a positive electrode of the battery V2 and a common, One end and the ground of KM4 normally open contact, battery module V2's negative pole is connected KM2 normally open contact's one end and common terminal connection KM2 normally closed contact's one end, KM2 normally closed contact's the other end is connected KM4 normally open contact's the other end and common terminal connection battery module V1's positive pole, battery module V1's negative pole is connected KM2 normally open contact's the other end and common terminal connection KM1 normally open contact's one end and KM1 normally closed contact's one end, KM1 normally open contact's the other end is connected the quick charge negative terminal, KM1 normally closed contact's the other end connection switch J1's one end, the negative terminal of power is connected to switch J1's one end.
8. A battery voltage adjusting method using the battery voltage adjusting circuit according to any one of claims 1 to 7, comprising the steps of:
S1: selecting a proper battery voltage regulating circuit for a power supply according to the voltage range which can be provided by the charging equipment;
S2: when charging is needed, the power supply is changed from a normal output state to a charging state; the battery voltage is regulated to a voltage range that the charging device can provide.
9. The battery voltage regulation method according to claim 8, wherein the step S2 specifically includes the steps of:
S201, disconnecting a J1 switch on a normal output circuit of the power supply, changing the state of a relay and changing the states of all contacts of the relay;
S202: the contact state change of the relay changes the connection relation of the battery modules of the power supply, so that part of the power supply modules in all the power supply modules which are originally connected in series are changed into a parallel connection state, and the overall voltage of the power supply is reduced.
10. An electric vehicle characterized by comprising the battery voltage regulating circuit according to any one of claims 1 to 7.
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584441Y (en) * | 2002-12-16 | 2003-11-05 | 林孟标 | Battery charging converter for energy-saving electric vehicle |
| CN101826643A (en) * | 2010-05-04 | 2010-09-08 | 郑州德朗能电池有限公司 | Rechargeable power battery |
| CN103534859A (en) * | 2011-03-17 | 2014-01-22 | 电动车芯片能量有限公司 | Battery pack system |
| JP5597728B2 (en) * | 2011-01-26 | 2014-10-01 | 株式会社日立製作所 | Electric vehicle power storage system |
| DE102016008263A1 (en) * | 2016-07-08 | 2017-02-16 | Daimler Ag | Battery arrangement for a motor vehicle |
| CN107599859A (en) * | 2017-09-01 | 2018-01-19 | 苏州达思灵新能源科技有限公司 | Electric power system, control method and the electric automobile of electric automobile |
| CN108448185A (en) * | 2018-05-15 | 2018-08-24 | 朱履明 | Electrokinetic cell system |
| CN109193881A (en) * | 2018-11-23 | 2019-01-11 | 北斗航天汽车（北京）有限公司 | Battery pack and fast charge method with quick-charge function |
-
2019
- 2019-08-14 CN CN201910748765.6A patent/CN110562095A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2584441Y (en) * | 2002-12-16 | 2003-11-05 | 林孟标 | Battery charging converter for energy-saving electric vehicle |
| CN101826643A (en) * | 2010-05-04 | 2010-09-08 | 郑州德朗能电池有限公司 | Rechargeable power battery |
| JP5597728B2 (en) * | 2011-01-26 | 2014-10-01 | 株式会社日立製作所 | Electric vehicle power storage system |
| CN103534859A (en) * | 2011-03-17 | 2014-01-22 | 电动车芯片能量有限公司 | Battery pack system |
| DE102016008263A1 (en) * | 2016-07-08 | 2017-02-16 | Daimler Ag | Battery arrangement for a motor vehicle |
| CN107599859A (en) * | 2017-09-01 | 2018-01-19 | 苏州达思灵新能源科技有限公司 | Electric power system, control method and the electric automobile of electric automobile |
| CN108448185A (en) * | 2018-05-15 | 2018-08-24 | 朱履明 | Electrokinetic cell system |
| CN109193881A (en) * | 2018-11-23 | 2019-01-11 | 北斗航天汽车（北京）有限公司 | Battery pack and fast charge method with quick-charge function |
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