CN221476812U - Power battery charging system and vehicle - Google Patents
Power battery charging system and vehicle Download PDFInfo
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- CN221476812U CN221476812U CN202323239184.0U CN202323239184U CN221476812U CN 221476812 U CN221476812 U CN 221476812U CN 202323239184 U CN202323239184 U CN 202323239184U CN 221476812 U CN221476812 U CN 221476812U
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- switching device
- power battery
- charging
- energy storage
- charging system
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- 238000004146 energy storage Methods 0.000 claims abstract description 35
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 238000010438 heat treatment Methods 0.000 description 13
- 239000003990 capacitor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 8
- 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
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present disclosure relates to a power battery charging system and a vehicle. The charging system (10) comprises a charging port (11), a boosting/energy storage circuit (12), a first switching device (K1), a second switching device (K2) and a third switching device (K3); a first switching device is connected between the charging port and the input end of the boosting/energy storage circuit, the output end of the boosting/energy storage circuit is connected with the power battery (20), and the boosting/energy storage circuit is used for boosting the voltage transmitted by the charging port through the first switching device and transmitting the boosted voltage to the power battery; a second switching device is connected between the charging port and the power battery, and the second switching device is used for directly charging the voltage transmitted at the charging port to the power battery; and a third switching device is connected between the input end of the boosting/energy storage circuit and the internal node of the power battery, and the boosting/energy storage circuit is also used for charging and discharging the power battery through the third switching device. The scheme realizes the switching of various processing demands of the power battery through a simple circuit structure.
Description
Technical Field
The present disclosure relates to the field of electrical circuits for electric vehicles, and in particular, to a power battery charging system and a vehicle.
Background
With the rapid development of new energy vehicles, the electric vehicles have increased in market proportion year by year. In the related art, through the arrangement of the step-up and step-down circuit, the charging equipment with different highest output voltage platforms can be compatible, so that quick charging can be realized, the charging efficiency can be improved, and the charging time can be shortened.
In a low temperature environment, lithium ion batteries are difficult to charge. In the related art, the battery is heated, and a method of providing a heating device outside the battery to raise the overall temperature of the battery may be used.
Disclosure of utility model
An object of the present disclosure is to provide a power battery charging system and a vehicle capable of performing boost charging, direct charging, and capable of heating a battery.
In order to achieve the above object, the present disclosure provides a power battery charging system. The charging system comprises a charging port, a boosting/energy storage circuit, a first switching device, a second switching device and a third switching device;
The power battery is characterized in that the first switching device is connected between the charging port and the input end of the boosting/energy storage circuit, the output end of the boosting/energy storage circuit is connected with the power battery, and the boosting/energy storage circuit is used for boosting the voltage transmitted by the charging port through the first switching device and transmitting the boosted voltage to the power battery;
The second switching device is connected between the charging port and the power battery and is used for directly charging the voltage transmitted by the charging port to the power battery;
The third switching device is connected between the input end of the boost/energy storage circuit and the internal node of the power battery, and the boost/energy storage circuit is further used for charging and discharging the power battery through the third switching device.
Optionally, the boost/tank circuit comprises a tank device and a switch tube combination comprising a plurality of switch tubes connected with the tank device.
Optionally, the switch tube combination comprises an N-phase bridge arm, the energy storage device comprises N inductors, and N is more than or equal to 1.
Optionally, one ends of the N inductors are commonly connected and serve as positive electrode input ends of the boost/energy storage circuit, the other ends of the N inductors are connected with midpoints of the N-phase bridge arms in a one-to-one correspondence manner, a first confluence end of the N-phase bridge arm serves as a positive electrode output end of the boost/energy storage circuit, and a second confluence end of the N-phase bridge arm serves as a negative electrode input end and a negative electrode output end of the boost/energy storage circuit.
Optionally, the switch tube is combined with a bridge arm of the multiplexing motor controller, and the energy storage device multiplexes a coil of the driving motor.
Optionally, the internal node of the power battery is a node between two half-packets of the power battery.
Optionally, the first switching device, the second switching device and the third switching device are relays.
Optionally, the charging port is a direct current charging port.
Optionally, the charging port includes a plurality of charging ports.
The disclosure also provides a vehicle including a power battery and the charging system described above.
Through the technical scheme, the boosting/energy storage circuit can be utilized to boost and charge the power battery by controlling the first switching device to be conducted; the second switching device is controlled to be conducted, so that the power battery can be directly charged; by controlling the third switching device to be turned on, the power battery can be charged and discharged by the boost/tank circuit to heat the battery. The scheme realizes the switching of various processing demands of the power battery through a simple circuit structure.
Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:
Fig. 1 is a block diagram of a power battery charging system according to an exemplary embodiment.
Fig. 2 is a schematic structural view of a power battery charging system according to another exemplary embodiment.
Fig. 3 is a schematic structural view of a power battery charging system according to still another exemplary embodiment.
Fig. 4 is a schematic diagram of the current flow in the direct charge loop in the power battery charging system of fig. 3.
Fig. 5-8 are schematic diagrams of the flow of current during battery heating in a power battery charging system.
Fig. 9 is a block diagram of a vehicle according to an exemplary embodiment.
Description of the reference numerals
10 Charging system 11 charging port 12 boost/tank circuit
111 First charging port 112 second charging port K1 first switching device
K2 second switching device K3 third switching device 20 power battery
K+ main positive relay K-main negative relay R1 pre-charge resistor
KR pre-charge relay C1 first capacitor C2 second capacitor
C3 third capacitor K4 fourth switching device K5 fifth switching device
K6 sixth switching device K7 seventh switching device Linductance
100 Vehicle
Detailed Description
Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.
Fig. 1 is a block diagram of a power battery charging system according to an exemplary embodiment. As shown in fig. 1, the charging system 10 includes a charging port 11, a boost/tank circuit 12, a first switching device K1, a second switching device K2, and a third switching device K3.
A first switching device K1 is connected between the charging port 11 and an input end of the boost/tank circuit 12, an output end of the boost/tank circuit 12 is connected to the power battery 20, and the boost/tank circuit 12 is configured to boost the voltage transmitted from the charging port 11 through the first switching device K1 and transmit the boosted voltage to the power battery 20.
A second switching device K2 is connected between the charging port 11 and the power battery 20, and the second switching device K2 is used for charging the voltage transmitted at the charging port 11 to the power battery 20.
A third switching device K3 is connected between the input terminal of the boost/tank circuit 12 and the internal node of the power battery 20, and the boost/tank circuit 12 is further configured to charge and discharge the power battery 20 through the third switching device K3.
The power battery charging system of the present disclosure can perform direct charging, boost charging and heating of a power battery. Boost/tank circuit 12 may be used to boost charge or heat a power battery. By controlling the on-off of the first, second and third switching devices K1, K2 and K3, the following functions may be performed:
(1) Boost charging: the first switching device K1 is turned on, and the second switching device K2 and the third switching device K3 are turned off.
(2) And (3) direct charging: the second switching device K2 is turned on, and the first switching device K1 and the third switching device K3 are turned off.
(3) Heating the battery: the third switching device K3 is turned on, and the first switching device K1 and the second switching device K2 are turned off.
(4) Direct charging and heating: the second switching device K2 and the third switching device K3 are turned on, and the first switching device K1 is turned off.
The boost/tank circuit 12 has a boost function, and can store and release energy. The charging and discharging of the power cell may be accomplished by alternating both the storing and discharging of the boost/tank circuit 12, thereby achieving the heating of the power cell. The first, second and third switching devices K1, K2 and K3 may be relays, for example. The internal node of the power cell 20 may be any node within the power cell 20.
Through the technical scheme, the boosting/energy storage circuit can be utilized to boost and charge the power battery by controlling the first switching device to be conducted; the second switching device is controlled to be conducted, so that the power battery can be directly charged; by controlling the third switching device to be turned on, the power battery can be charged and discharged by the boost/tank circuit to heat the battery. The scheme realizes the switching of various processing demands of the power battery through a simple circuit structure.
In yet another embodiment, the boost/tank circuit 12 may include a tank device and a switching tube combination including a plurality of switching tubes connected to the tank device. The energy storage device can be used for storing and releasing energy by controlling the on and off of a plurality of switching tubes in the switching tube combination.
Fig. 2 is a schematic structural view of a power battery charging system according to another exemplary embodiment. As shown in fig. 2, the inductor L is an energy storage device, and the switching tube is combined into a one-phase bridge arm (including an upper bridge arm and a lower bridge arm). One end of the inductor L is used as a positive input end of the boost/tank circuit 12, and the other end of the inductor L is connected to a node between the upper bridge arm and the lower bridge arm. One end of the one-phase bridge arm is used as a positive output end of the boost/energy storage circuit 12, and the other end of the one-phase bridge arm is used as a negative output end and a negative input end of the boost/energy storage circuit 12. The first capacitor C1 may also be connected between the negative output terminal and the positive output terminal of the boost/tank circuit 12, to perform a voltage stabilizing function.
When the boost/tank circuit 12 performs the boost function, in the first timing sequence, the lower bridge arm can be controlled to be conducted to store energy for the inductor L; in the second time sequence, the lower bridge arm can be controlled to be turned off, and the upper bridge arm can be controlled to be turned on. When the first time sequence and the second time sequence are alternately executed according to a certain frequency, the current direction in the inductor L is not changed, and the voltage of the inductor L is overlapped with the voltage output by the external charging pile to charge the battery, so that the boosting function is realized.
When the boost/tank circuit 12 performs the function of charging and discharging the power battery with the stored energy to heat the battery, in the first timing, the upper bridge arm is controlled to be turned on, and the inductor L is stored with the discharged energy of the power battery; in the second time sequence, the upper bridge arm is controlled to be disconnected so as to discharge the inductor L; in the third time sequence, the lower bridge arm is controlled to be conducted to charge the inductor L; in the fourth timing, the lower arm is controlled to be turned off to discharge the inductance L. From the first time sequence to the fourth time sequence, the power battery can be circularly controlled according to a certain frequency, and the current between the two parts divided by the power battery oscillates mutually to carry out pulse charge and discharge, so that the power battery can generate heat due to the internal resistance of the battery, and the self-heating of the battery is realized.
The charging port 11 may include a plurality of charging ports. In fig. 2, the charging port 11 includes a first charging port 111 and a second charging port 112. The first charging port 111 is connected to the positive output terminal of the second charging port 112, and the negative output terminal is connected. In this way, double gun charging can be achieved. The charging port 11 is a dc charging port.
In yet another embodiment, the switching tube combination includes N-phase legs, the energy storage device includes N inductors, and N is greater than or equal to 1. Fig. 3 is a schematic structural view of a power battery charging system according to still another exemplary embodiment. As shown in fig. 3, n=3. One end of the N inductors is commonly connected and serves as a positive electrode input end of the boost/energy storage circuit 12, the other ends of the N inductors are correspondingly connected with midpoints of N-phase bridge arms one by one, a first confluence end of the N-phase bridge arms serves as a positive electrode output end of the boost/energy storage circuit 12, and a second confluence end of the N-phase bridge arms serves as a negative electrode input end and a negative electrode output end of the boost/energy storage circuit 12.
When N is greater than 1, the on-off of the corresponding bridge arm can be controlled to realize boosting or heating of the battery by utilizing one or more inductors.
In yet another embodiment, the switching tube combination may multiplex the legs of the motor controller and the energy storage device may multiplex the coils of the drive motor. Therefore, the motor controller and the driving motor can be reused because the vehicle is not driven during charging, the utilization rate of electronic devices is high, devices and cost are saved, and the space in the vehicle is also saved.
In fig. 3, the positive output of the power battery is connected with a main positive relay k+, a main negative relay K-, a pre-charge relay KR and a pre-charge resistor R1. A second capacitor C2 is connected between the negative output terminal and the positive output terminal of the boost/tank circuit 12, and functions to stabilize voltage. The positive electrode output end and the negative electrode output end of the first charging port 111 are respectively connected with a fourth switching device K4 and a fifth switching device K5, and the positive electrode output end and the negative electrode output end of the second charging port 112 are respectively connected with a sixth switching device K6 and a seventh switching device K7. One end of the third capacitor C3 is connected with the positive electrode output end of the first charging port 111 through the fourth switching device K4, and the other end of the third capacitor C3 is connected with the negative electrode output end of the first charging port 111 through the fifth switching device K5. The third capacitor C3 acts as a voltage regulator.
Fig. 4 is a schematic diagram of the current flow in the direct charge loop in the power battery charging system of fig. 3. As shown in fig. 4, the second switching device K2 is turned on, the first switching device K1 and the third switching device K3 are turned off, and the current flows in the direction of the arrow in the figure.
Fig. 5-8 are schematic diagrams of the flow of current during battery heating in a power battery charging system.
In the first timing sequence shown in fig. 5, the motor coil is charged by controlling the upper bridge arm in the three-phase bridge arm to be simultaneously turned on; in the second timing shown in fig. 6, the motor coil is discharged by controlling the upper arm of the three-phase arm to be simultaneously turned off; in the third timing sequence shown in fig. 7, the motor coil is charged by controlling the lower bridge arm of the three-phase bridge arms to be simultaneously turned on; in the fourth timing shown in fig. 8, the motor coils are discharged by controlling the lower arms of the three-phase arms to be simultaneously turned off. The first time sequence to the fourth time sequence are circularly controlled according to a certain frequency, and the corresponding current direction is shown by an arrow in the figure. The power battery is divided into two parts by a node, current oscillates mutually to perform pulse charge and discharge, and heat can be generated by the power battery due to internal resistance of the battery, so that self-heating of the battery is realized. Therefore, the temperature of the battery is quickly increased, and the charging speed of the power battery at low temperature is increased.
Those skilled in the art will appreciate that the direct charge current of fig. 4 and the current for battery heating of fig. 5-8 may be superimposed when direct charge and heating are performed simultaneously.
In yet another embodiment, the internal node of the power cell 20 may be a node between two half-packs of the power cell 20. The two half packs of the power cells 20 are connected in series. In this way, the two half packs are more easily balanced when the power cell is heated.
The present disclosure also provides a vehicle. Fig. 9 is a block diagram of a vehicle according to an exemplary embodiment. As shown in fig. 9, the vehicle 100 includes the power battery 20 and the charging system 10 described above.
The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the embodiments described above, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations are not described further in this disclosure in order to avoid unnecessary repetition.
Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.
Claims (10)
1. A power battery charging system (10), characterized in that the charging system (10) comprises a charging port (11), a boost/tank circuit (12), a first switching device (K1), a second switching device (K2) and a third switching device (K3);
The first switching device (K1) is connected between the charging port (11) and the input end of the boosting/energy storage circuit (12), the output end of the boosting/energy storage circuit (12) is connected with the power battery (20), and the boosting/energy storage circuit (12) is used for boosting the voltage transmitted by the charging port (11) through the first switching device (K1) and transmitting the boosted voltage to the power battery (20);
The second switching device (K2) is connected between the charging port (11) and the power battery (20), and the second switching device (K2) is used for directly charging the voltage transmitted by the charging port (11) to the power battery (20);
The third switching device (K3) is connected between the input end of the boosting/energy storage circuit (12) and the internal node of the power battery (20), and the boosting/energy storage circuit (12) is further used for charging and discharging the power battery (20) through the third switching device (K3).
2. The charging system (10) of claim 1, wherein the boost/tank circuit (12) comprises a tank device and a switch tube combination comprising a plurality of switch tubes connected with the tank device.
3. The charging system (10) of claim 2, wherein the switching tube combination includes an N-phase leg, the energy storage device includes N inductors, and N is greater than or equal to 1.
4. A charging system (10) according to claim 3, wherein one end of the N inductors is commonly connected, as an anode input end of the boost/tank circuit (12), and the other ends of the N inductors are connected to midpoints of the N-phase bridge arms in a one-to-one correspondence, a first confluence end of the N-phase bridge arms is used as an anode output end of the boost/tank circuit (12), and a second confluence end of the N-phase bridge arms is used as a cathode input end and a cathode output end of the boost/tank circuit (12).
5. The charging system (10) of claim 2, wherein the switching tube combination multiplexes legs of a motor controller and the energy storage device multiplexes coils of a drive motor.
6. The charging system (10) of claim 1, wherein the internal node of the power cell (20) is a node between two half-packs of the power cell (20).
7. The charging system (10) according to claim 1, wherein the first switching device (K1), the second switching device (K2) and the third switching device (K3) are relays.
8. The charging system (10) according to claim 1, wherein the charging port (11) is a direct current charging port.
9. The charging system (10) according to claim 1, wherein the charging port (11) comprises a plurality of charging ports.
10. A vehicle characterized by comprising a power battery (20) and a charging system (10) according to any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323239184.0U CN221476812U (en) | 2023-11-28 | 2023-11-28 | Power battery charging system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323239184.0U CN221476812U (en) | 2023-11-28 | 2023-11-28 | Power battery charging system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221476812U true CN221476812U (en) | 2024-08-06 |
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ID=92365374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323239184.0U Active CN221476812U (en) | 2023-11-28 | 2023-11-28 | Power battery charging system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221476812U (en) |
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2023
- 2023-11-28 CN CN202323239184.0U patent/CN221476812U/en active Active
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