CN112688297A - Vehicle-mounted energy storage system based on multiple voltage values and voltage switching method thereof - Google Patents
Vehicle-mounted energy storage system based on multiple voltage values and voltage switching method thereof Download PDFInfo
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- CN112688297A CN112688297A CN202011493940.0A CN202011493940A CN112688297A CN 112688297 A CN112688297 A CN 112688297A CN 202011493940 A CN202011493940 A CN 202011493940A CN 112688297 A CN112688297 A CN 112688297A
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Abstract
The invention provides a vehicle-mounted energy storage system based on multiple voltage values and a voltage switching method thereof, wherein the method comprises the following steps: the positive electrode of the vehicle-mounted energy storage system is connected with the positive electrode of the first battery pack; the negative pole of the vehicle-mounted energy storage system is connected with the negative pole of the second battery pack, the negative pole of the first battery pack is connected with the positive pole of the second battery pack through the first switch, the positive pole of the vehicle-mounted energy storage system is connected with the positive pole of the second battery pack through the second switch, and the negative pole of the first battery pack is connected with the negative pole of the second battery pack through the third switch. According to the vehicle-mounted energy storage system based on various voltage values and the voltage switching method thereof, the two battery packs can control the voltage value of the vehicle-mounted energy storage system through the closed and open states of the three switches, and a transformer is not required to be additionally arranged for adjustment, so that the voltage application requirements under different scenes are met, and the equipment cost of the electric automobile is greatly reduced.
Description
Technical Field
The invention relates to the technical field of new energy batteries, in particular to a vehicle-mounted energy storage system based on multiple voltage values and a voltage switching method thereof.
Background
The current electric automobile uses unified voltage platform, in order to satisfy the power consumption demand of different spare parts on the car, need add the transformer generally and carry out the pressure regulating to satisfy under the different scenes voltage application demand, improved electric automobile's cost in the intangible.
Disclosure of Invention
In order to solve the problems, the invention provides a vehicle-mounted energy storage system based on various voltage values and a voltage switching method thereof.
In order to achieve the above purpose, the invention adopts a technical scheme that:
an on-board energy storage system based on multiple voltage values, comprising: the positive electrode of the vehicle-mounted energy storage system is connected with the positive electrode of the first battery pack; the negative pole of the vehicle-mounted energy storage system is connected with the negative pole of the second battery pack, the negative pole of the first battery pack is connected with the positive pole of the second battery pack through the first switch, the positive pole of the vehicle-mounted energy storage system is connected with the positive pole of the second battery pack through the second switch, and the negative pole of the first battery pack is connected with the negative pole of the second battery pack through the third switch.
Further, the first battery pack and the second battery pack are both 400V battery packs.
The invention also provides a vehicle-mounted energy storage system switching method based on various voltage values, which comprises the following steps: s10, in a non-charging state, turning on the second switch and the third switch, and turning on the first switch, so that the first battery pack and the second battery pack are connected in series; s20, a charging state, wherein the first switch is turned on, and the second switch and the third switch are turned on, so that the first battery pack and the second battery pack are connected in parallel.
Further, the on-board energy storage system includes: the positive electrode of the vehicle-mounted energy storage system is connected with the positive electrode of the first battery pack; the negative pole of the vehicle-mounted energy storage system is connected with the negative pole of the second battery pack, the negative pole of the first battery pack is connected with the positive pole of the second battery pack through the first switch, the positive pole of the vehicle-mounted energy storage system is connected with the positive pole of the second battery pack through the second switch, and the negative pole of the first battery pack is connected with the negative pole of the second battery pack through the third switch.
Further, the first battery pack and the second battery pack are both 400V battery packs.
Compared with the prior art, the technical scheme of the invention has the following advantages:
according to the vehicle-mounted energy storage system based on various voltage values and the voltage switching method thereof, the two battery packs can control the voltage value of the vehicle-mounted energy storage system through the closed and open states of the three switches, and a transformer is not required to be additionally arranged for adjustment, so that the voltage application requirements under different scenes are met, and the equipment cost of the electric automobile is greatly reduced.
Drawings
The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a structural diagram of an on-vehicle energy storage system based on various voltage values according to an embodiment of the invention.
Reference numbers in the figures:
1 a first battery pack, 2 a second battery pack, 3 a first switch, 4 a second switch, 5 a third switch.
Detailed Description
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.
The embodiment provides a vehicle-mounted energy storage system based on multiple voltage values and a voltage switching method thereof, as shown in fig. 1, the vehicle-mounted energy storage system comprises a first battery pack 1 and a second battery pack 2, wherein a positive electrode of the vehicle-mounted energy storage system is connected with a positive electrode of the first battery pack 1, a negative electrode of the vehicle-mounted energy storage system is connected with a negative electrode of the second battery pack 2, a negative electrode of the first battery pack 1 is connected with a positive electrode of the second battery pack 2 through a first switch 3, a positive electrode of the vehicle-mounted energy storage system is connected with a positive electrode of the second battery pack 2 through a second switch 4, and a negative electrode of the first battery pack 1 is connected with a negative electrode of the second battery pack 2 through a third switch 5.
In order to be used with an electric vehicle, the first battery pack 1 and the second battery pack 2 are both 400V battery packs.
The invention also provides a method for switching the vehicle-mounted energy storage systems with various voltage values, which comprises the following steps: s10, in the non-charging state, the second switch 4 and the third switch 5 are opened, and the first switch 3 is turned on, so that the first battery pack 1 and the second battery pack 2 are connected in series; s20, the first switch 3 is turned on, and the second switch 4 and the third switch 5 are turned on, so that the first battery pack 1 and the second battery pack 2 are connected in parallel.
The vehicle-mounted energy storage system comprises: and the anode of the vehicle-mounted energy storage system is connected with the anode of the first battery pack 1. The vehicle-mounted energy storage system comprises a second battery pack 2, wherein the negative electrode of the vehicle-mounted energy storage system is connected with the negative electrode of the second battery pack 2, the negative electrode of the first battery pack 1 is connected with the positive electrode of the second battery pack 2 through a first switch 3, the positive electrode of the vehicle-mounted energy storage system is connected with the positive electrode of the second battery pack 2 through a second switch 4, and the negative electrode of the first battery pack 1 is connected with the negative electrode of the second battery pack 2 through a third switch 5.
The first battery pack 1 and the second battery pack 2 are both 400V battery packs.
The invention realizes the change of the voltage platform of the vehicle-mounted energy storage system by changing the electrical connection structure of the vehicle-mounted energy storage system so as to meet the requirements of matching of vehicle parts and matching of direct-current quick charging voltage and power. The vehicle-mounted energy storage system can be applied to the following conditions:
firstly, when all parts (batteries, a motor controller, an air conditioner and DCDC) of the whole vehicle are 400V, and the charging temperature is reduced, the 400V batteries can be used during driving, an 800V battery system is used in the internal structure of the transformer battery during charging, the thermal power is reduced by one time under the same power, and the charging speed is increased by one time under the same current condition. Most of the current passenger cars are supply chains of 400V platforms, and the supply chains are not required to be adjusted or new technology is not required to be developed by using the structure
And secondly, when all parts (batteries, a motor controller, an air conditioner and DCDC) of the whole vehicle are 800V, but the charging pile cannot output 800V, the 800V batteries can be used during driving, and a 400V battery system is used in the internal structure of the transformer battery during charging so as to be matched with a charging facility. The whole vehicle can use a uniform voltage platform, does not need to be additionally provided with a DCDC transformer for voltage regulation, and can meet the application requirements of double voltage platforms in different scenes.
The above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent structures or equivalent processes that are transformed by the content of the present specification and the attached drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. An on-vehicle energy storage system based on multiple voltage values, characterized by comprising:
the positive electrode of the vehicle-mounted energy storage system is connected with the positive electrode of the first battery pack;
the negative pole of the vehicle-mounted energy storage system is connected with the negative pole of the second battery pack, the negative pole of the first battery pack is connected with the positive pole of the second battery pack through the first switch, the positive pole of the vehicle-mounted energy storage system is connected with the positive pole of the second battery pack through the second switch, and the negative pole of the first battery pack is connected with the negative pole of the second battery pack through the third switch.
2. The vehicle-mounted energy storage system based on multiple voltage values and the voltage switching method thereof according to claim 1, wherein the first battery pack and the second battery pack are 400V battery packs.
3. A vehicle-mounted energy storage system switching method based on multiple voltage values is characterized by comprising the following steps:
s10, in a non-charging state, turning on the second switch and the third switch, and turning on the first switch, so that the first battery pack and the second battery pack are connected in series;
s20, a charging state, wherein the first switch is turned on, and the second switch and the third switch are turned on, so that the first battery pack and the second battery pack are connected in parallel.
4. The vehicle-mounted energy storage system based on multiple voltage values and the voltage switching method thereof according to claim 3, wherein the vehicle-mounted energy storage system comprises:
the positive electrode of the vehicle-mounted energy storage system is connected with the positive electrode of the first battery pack;
the negative pole of the vehicle-mounted energy storage system is connected with the negative pole of the second battery pack, the negative pole of the first battery pack is connected with the positive pole of the second battery pack through the first switch, the positive pole of the vehicle-mounted energy storage system is connected with the positive pole of the second battery pack through the second switch, and the negative pole of the first battery pack is connected with the negative pole of the second battery pack through the third switch.
5. The vehicle-mounted energy storage system based on multiple voltage values and the voltage switching method thereof according to claim 4, wherein the first battery pack and the second battery pack are 400V battery packs.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011493940.0A CN112688297A (en) | 2020-12-17 | 2020-12-17 | Vehicle-mounted energy storage system based on multiple voltage values and voltage switching method thereof |
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| CN202011493940.0A CN112688297A (en) | 2020-12-17 | 2020-12-17 | Vehicle-mounted energy storage system based on multiple voltage values and voltage switching method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207265694U (en) * | 2017-08-15 | 2018-04-20 | 宁夏黑金昊源绿能科技有限公司 | Voltage switching output device and system |
| CN110316008A (en) * | 2019-06-03 | 2019-10-11 | 浙江吉利控股集团有限公司 | A kind of battery system of vehicle and its method for carrying out charge and discharge |
| CN111546944A (en) * | 2020-04-10 | 2020-08-18 | 吉利汽车研究院（宁波）有限公司 | Charging voltage switching device, control method and automobile |
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- 2020-12-17 CN CN202011493940.0A patent/CN112688297A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207265694U (en) * | 2017-08-15 | 2018-04-20 | 宁夏黑金昊源绿能科技有限公司 | Voltage switching output device and system |
| CN110316008A (en) * | 2019-06-03 | 2019-10-11 | 浙江吉利控股集团有限公司 | A kind of battery system of vehicle and its method for carrying out charge and discharge |
| CN111546944A (en) * | 2020-04-10 | 2020-08-18 | 吉利汽车研究院（宁波）有限公司 | Charging voltage switching device, control method and automobile |
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