CN217589316U - Battery system and vehicle - Google Patents
Battery system and vehicle Download PDFInfo
- Publication number
- CN217589316U CN217589316U CN202221037880.6U CN202221037880U CN217589316U CN 217589316 U CN217589316 U CN 217589316U CN 202221037880 U CN202221037880 U CN 202221037880U CN 217589316 U CN217589316 U CN 217589316U
- Authority
- CN
- China
- Prior art keywords
- battery
- parallel
- battery system
- voltage
- series
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The embodiment of the utility model provides a battery system and vehicle relates to battery technical field. The battery system includes: a plurality of battery modules, a parallel switch circuit, and a series switch circuit; the plurality of battery modules are connected in parallel through a parallel switch circuit, or the plurality of battery modules are connected in series through a series switch circuit; the battery modules connected in parallel or in series form a positive terminal and a negative terminal of the battery system, the positive terminal is connected to the charging interface through a main positive relay, and the negative terminal is connected to the charging interface through a main negative relay; when a plurality of battery modules are connected in parallel, the discharging voltage or the charging voltage of the battery system is a first preset voltage; when the plurality of battery modules are connected in series, the charging voltage of the battery system is a second preset voltage, and the first preset voltage is smaller than the second preset voltage. The utility model discloses in, reduced charge time, still reduced the line loss when having promoted voltage, helped promoting battery system efficiency.
Description
Technical Field
The utility model relates to a battery technology field, concretely relates to battery system and vehicle.
Background
With the enhancement of environmental protection consciousness of people, the market of new energy automobiles is also continuously expanded, and lithium batteries are commonly used at present as the power core of the new energy automobiles. In a new energy automobile, due to the complexity of a battery system and a control strategy thereof, different control modes need to be designed to correspond to the state of the system, so as to avoid damage to components in the new energy automobile due to the inconsistency of voltage platforms.
In the use process of the new energy automobile, the problem of slow charging is caused due to large line loss of a charging line; although the charging current can be increased by increasing the diameter of the charging wire to realize quick charging, the problem of serious heat generation exists.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a battery system and vehicle, through the series connection or parallelly connected of a plurality of battery module among the control battery system for battery system can compatible high voltage charging device's quick charge and low voltage charging device's slow speed charge, when a plurality of battery module establish ties, can realize quick charge, has reduced charge time, has still reduced the line loss when having promoted voltage, helps promoting battery system efficiency.
In order to achieve the above object, the present invention provides a battery system, including: a plurality of battery modules, a parallel switch circuit, and a series switch circuit; the plurality of battery modules are connected in parallel by the parallel switch circuit, or the plurality of battery modules are connected in series by the series switch circuit; the battery modules connected in parallel or in series form a positive end and a negative end of the battery system, the positive end is connected to a charging interface through a main positive relay, and the negative end is connected to the charging interface through a main negative relay; when the plurality of battery modules are connected in parallel, the discharging voltage or the charging voltage of the battery system is a first preset voltage; when the plurality of battery modules are connected in series, the charging voltage of the battery system is a second preset voltage, and the first preset voltage is smaller than the second preset voltage.
The utility model also provides a vehicle, include: the battery system, the main positive relay, the main negative relay, the load circuit and the charging interface are arranged on the charging interface; the positive end of the battery system is connected to the charging interface through the main positive relay, and the negative end of the battery system is connected to the charging interface through the main negative relay.
An embodiment of the utility model provides a battery system, include: a plurality of battery modules, a parallel switch circuit, and a series switch circuit; the plurality of battery modules are connected in parallel through a parallel switch circuit, or the plurality of battery modules are connected in series through a series switch circuit; when a plurality of battery modules are connected in parallel, the discharging voltage or the charging voltage of the battery system is a first preset voltage; when the plurality of battery modules are connected in series, the charging voltage of the battery system is a second preset voltage, and the first preset voltage is smaller than the second preset voltage. Based on this, through the series connection or parallelly connected of a plurality of battery module in the control battery system for battery system can be compatible high voltage charging device's quick charge and low voltage charging device's slow speed charge, when a plurality of battery module establish ties, can realize quick charge, has reduced charge time, has still reduced the line loss when having promoted the voltage, helps promoting battery system efficiency.
In one embodiment, the first preset voltage is equal to the voltage of a single battery module; the second preset voltage is equal to N times of the voltage of a single battery module, where N is the number of the battery modules.
In one embodiment, the parallel switch circuit includes: 2 × N-1 parallel switches, between two adjacent battery modules, a positive electrode of one battery module is connected to a positive electrode of the other battery module through the parallel switch, and a negative electrode of one battery module is connected to a negative electrode of the other battery module through the parallel switch; where N is the number of battery modules.
In one embodiment, the series switching circuit includes: n-1 series switches, between two adjacent battery modules, the positive electrode of one battery module is connected to the negative electrode of the other battery module through the series switches; where N is the number of battery modules.
In one embodiment, the battery module is a battery cell or a battery module.
In one embodiment, the vehicle further includes an onboard charging module, the load circuit including: and the positive terminal and the negative terminal are respectively connected to a first DC/DC converter in the load circuit, and the first DC/DC converter is connected to the charging interface through the vehicle-mounted charging module.
In one embodiment, the load circuit further comprises: a second DC/DC converter, a DC/AC converter, a motor, a compressor; the second DC/DC converter, the DC/AC converter and the compressor are electrically connected with the first DC/DC converter respectively; the motor is electrically connected to the second DC/DC converter.
In one embodiment, the vehicle further comprises: the pre-charging circuit is connected in parallel with two ends of the main positive relay; the pre-charge circuit includes: and the pre-charging switch and the pre-charging resistor are connected in series.
In one embodiment, the vehicle further comprises a controller connected to the battery system, the main positive relay, the main negative relay, and the charging interface, respectively.
Drawings
Fig. 1 is a schematic view of a battery system according to a first embodiment of the present invention applied to a vehicle;
fig. 2 is a schematic view of a vehicle according to a second embodiment of the present invention.
Detailed Description
Various embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solution of the invention.
In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that an embodiment can be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.
Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.
Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
As used in this specification and the appended claims, the singular forms "a", "an", and "the" include plural referents unless the context clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "or/and" unless the context clearly dictates otherwise.
In the following description, for the sake of clarity of illustrating the structure and operation of the present invention, directional terms are used, but the terms "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be interpreted as words of convenience and should not be interpreted as limiting terms.
The utility model discloses a first embodiment relates to a battery system can use in electric vehicle, and this battery system can compatible high voltage charging device's quick charge and low voltage charging device's slow speed charge.
The battery system includes; a plurality of battery modules, a parallel switch circuit, and a series switch circuit. The battery module is a battery unit or a battery module.
The plurality of battery modules are connected in parallel through a parallel switch circuit, or the plurality of battery modules are connected in series through a series switch circuit; the battery modules connected in parallel or in series form a positive terminal and a negative terminal of the battery system, the positive terminal is connected to the charging interface through a main positive relay, and the negative terminal is connected to the charging interface through a main negative relay; when a plurality of battery modules are connected in parallel, the discharge voltage or the charge voltage of the battery system is a first preset voltage; when the plurality of battery modules are connected in series, the charging voltage of the battery system is a second preset voltage, and the first preset voltage is smaller than the second preset voltage.
As can be seen from the above, in the battery system, the parallel switch circuit can connect the plurality of battery modules in parallel, the capacity of the battery system after the parallel connection is N times of that of a single battery module (N is the number of the battery modules), at this time, the battery system can be suitable for slow charging in which the charging voltage is the first preset voltage, the output voltage of the battery system is the first preset voltage in the discharging mode to supply power to the load circuit in the vehicle, and the first preset voltage is equal to the voltage of the single battery module. The series switch circuit can enable the plurality of battery modules to be sequentially connected in series, the battery system can be suitable for quick charging with charging voltage being second preset voltage, the second preset voltage is equal to N times of the voltage of a single battery module, and N is the number of the battery modules. The switching on and off of the parallel switch circuit and the series switch circuit can be controlled by a battery management system BMS of the vehicle, that is, the BMS adjusts the parallel connection or the series connection of a plurality of battery modules in the battery system according to the input voltage of the current charging interface.
In one example, a parallel switching circuit includes: and 2 (N-1) parallel switches, wherein between two adjacent battery modules, the positive pole of one battery module is connected to the positive pole of the other battery module through the parallel switches, and the negative pole of one battery module is connected to the negative pole of the other battery module through the parallel switches. The series switching circuit includes: n-1 series switches, between two adjacent battery modules, the positive pole of one battery module is connected to the negative pole of the other battery module through the series switch; where N is the number of battery modules.
Taking an example that the battery system includes two battery modules as an example, please refer to fig. 1, in which the parallel switch circuit includes 2 parallel switches, which are a parallel switch S1 and a parallel switch S2, respectively, and the series switch circuit includes 1 series switch S3.
The two battery modules are respectively a battery module 11 and a battery module 12, the vehicle voltage of the electric vehicle commonly used in the electric vehicle is 500V, and the voltage of the battery module 11 and the voltage of the battery module 12 are both 500V in this embodiment.
The positive pole of the battery 11 is connected to the positive pole of the battery module 12 through the parallel switch S1, the negative pole of the battery module 11 is connected to the negative pole of the battery module 12 through the parallel switch S2, and the negative pole of the battery module 11 is also connected to the positive pole of the battery module 12 through the series switch S3.
The positive pole of the battery module 11 forms the positive pole end of the battery system, the negative pole of the battery module 12 forms the negative pole end of the battery system, the positive pole end of the battery system is connected to one end of a main positive relay S4 of the vehicle, the other end of the main positive relay S4 is connected to the positive input end of the load circuit 2, the negative pole end of the battery system is connected to one end of a main negative relay S5 of the vehicle, and the other end of the main negative relay S5 is connected to the negative input end of the load circuit 2. The positive terminal of the battery system is connected to the charging interface 3 of the vehicle through a main positive relay S4, and the negative terminal of the battery system is connected to the charging interface 3 of the vehicle through a main negative relay S5. In addition, the load circuit 2 is also connected to the charging interface 3 through an on-vehicle charging module 4 of the vehicle; the load circuit 2 is also connected to the BMS system of the vehicle to supply power to the BMS system, which is connected to the parallel switch S1, the parallel switch S2, the series switch S3, the main positive relay S4, and the main negative relay S5, respectively, to control the on/off of each switch, relay.
When the battery system is in a discharging or 500V voltage charging mode, the parallel switch S1 and the parallel switch S2 are conducted, the series switch S3 is disconnected, the battery module 11 and the battery module 12 are connected in parallel, the high-voltage direct current bus is 500VDC, and the capacity of the battery system is 2 times of that of a single battery module; when the battery system is in a 1000V voltage charging mode, the parallel switch S1 and the parallel switch S2 are disconnected, the series switch S3 is connected, rapid charging can be carried out, and at the moment, a vehicle load circuit is isolated from the battery system.
The embodiment provides a battery system, including: a plurality of battery modules, a parallel switch circuit, and a series switch circuit; the plurality of battery modules are connected in parallel through a parallel switch circuit, or the plurality of battery modules are connected in series through a series switch circuit; when a plurality of battery modules are connected in parallel, the discharging voltage or the charging voltage of the battery system is a first preset voltage; when the plurality of battery modules are connected in series, the charging voltage of the battery system is a second preset voltage, and the first preset voltage is smaller than the second preset voltage. Based on this, through the series connection or parallelly connected of a plurality of battery modules in the control battery system for battery system can compatible high voltage charging device's quick charge and low voltage charging device's slow speed charge, when a plurality of battery modules are established ties, can realize quick charge, has reduced charge time, has still reduced the line loss when having promoted the voltage, helps promoting battery system efficiency.
A second embodiment of the present invention relates to a vehicle, please refer to fig. 1 and 2, the vehicle includes: the battery system, the main positive relay S4, the main negative relay S5, the load circuit 2, and the charging interface 3 in the first embodiment; the positive pole end of battery system is connected to interface 3 that charges through main positive relay S4, and the negative pole end of battery system is connected to interface 3 that charges through main negative relay S5. The specific structure of the battery system is as in the first embodiment, and is not described herein again. It should be noted that, in this embodiment, only some components included in the vehicle are referred to, and other components in the vehicle are not described in detail here.
In one example, the vehicle further includes an onboard charging module 4, and the load circuit 2 includes: the first DC/DC converter 21 has a positive terminal and a negative terminal connected to the first DC/DC converter 21 in the load circuit, respectively, and the first DC/DC converter 21 is connected to the charging interface 3 through the vehicle-mounted charging module 4. The electric vehicle voltage commonly used in the electric vehicle is 500V, and in this case, the first DC/DC converter 21 is a 500V DC/DC converter.
In one example, the load circuit 2 further includes: a second DC/DC converter 22, a DC/AC converter 23, a motor 24, a compressor 25; the second DC/DC converter 22, the DC/AC converter 23, and the compressor 25 are electrically connected to the first DC/DC converter 21, respectively; the motor 24 is electrically connected to the DC/AC converter 23. Wherein the second DC/DC converter 21 is used to power the battery management system 5 of the vehicle, the second DC/DC converter 21 being, for example, a 12V DC/DC converter; the DC/AC converter 23 is used to convert the direct current into alternating current to power the motor 24. In addition, the motor 24, the compressor 25, and the like are common components in a vehicle, and are not described one by one.
In one example, the vehicle further includes: the pre-charging circuit is connected in parallel with two ends of the main positive relay S4; the pre-charging circuit includes: and a pre-charging switch S6 and a pre-charging resistor R1 which are connected in series.
In one example, the vehicle further includes a controller connected to the battery system, the main positive relay, the main negative relay, and the charging interface, respectively. The controller may be a battery management system 5 of the vehicle, and the BMS system is connected to the parallel switch S1, the parallel switch S2, the series switch S3, the main positive relay S4, and the main negative relay S5, respectively, to control on/off of each switch and relay.
While the preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.
These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.
Claims (10)
1. A battery system, comprising: a plurality of battery modules, a parallel switch circuit, and a series switch circuit;
the plurality of battery modules are connected in parallel by the parallel switch circuit, or the plurality of battery modules are connected in series by the series switch circuit;
the battery modules connected in parallel or in series form a positive end and a negative end of the battery system, the positive end is connected to a charging interface through a main positive relay, and the negative end is connected to the charging interface through a main negative relay;
when the plurality of battery modules are connected in parallel, the discharging voltage or the charging voltage of the battery system is a first preset voltage; when the plurality of battery modules are connected in series, the charging voltage of the battery system is a second preset voltage, and the first preset voltage is smaller than the second preset voltage.
2. The battery system of claim 1, wherein the first preset voltage is equal to a voltage of a single battery module; the second preset voltage is equal to N times of the voltage of a single battery module, where N is the number of the battery modules.
3. The battery system of claim 1, wherein the parallel switching circuit comprises: 2 x (N-1) parallel switches, between two adjacent battery modules, a positive electrode of one battery module being connected to a positive electrode of the other battery module through the parallel switches, and a negative electrode of one battery module being connected to a negative electrode of the other battery module through the parallel switches; where N is the number of battery modules.
4. The battery system of claim 1, wherein the series switching circuit comprises: n-1 series switches, between two adjacent battery modules, the positive pole of one battery module is connected to the negative pole of the other battery module through the series switches; where N is the number of battery modules.
5. The battery system according to any one of claims 1 to 4, wherein the battery module is a battery cell or a battery module.
6. A vehicle, characterized by comprising: the battery system, the main positive relay, the main negative relay, the load circuit, and the charging interface of any one of claims 1 to 4; the positive end of the battery system is connected to the charging interface through the main positive relay, and the negative end of the battery system is connected to the charging interface through the main negative relay.
7. The vehicle of claim 6, further comprising an onboard charging module, the load circuit comprising: and the positive terminal and the negative terminal of the first DC/DC converter are respectively connected to the first DC/DC converter in the load circuit, and the first DC/DC converter is connected to the charging interface through the vehicle-mounted charging module.
8. The vehicle of claim 7, wherein the load circuit further comprises: the second DC/DC converter, the DC/AC converter, the motor and the compressor; the second DC/DC converter, the DC/AC converter and the compressor are electrically connected with the first DC/DC converter respectively; the motor is electrically connected to the DC/AC converter.
9. The vehicle of claim 6, further comprising: the pre-charging circuit is connected in parallel to two ends of the main positive relay; the pre-charge circuit includes: and the pre-charging switch and the pre-charging resistor are connected in series.
10. The vehicle of claim 6, further comprising a controller connected to the battery system, the main positive relay, the main negative relay, and the charging interface, respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221037880.6U CN217589316U (en) | 2022-04-29 | 2022-04-29 | Battery system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221037880.6U CN217589316U (en) | 2022-04-29 | 2022-04-29 | Battery system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217589316U true CN217589316U (en) | 2022-10-14 |
Family
ID=83548393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221037880.6U Active CN217589316U (en) | 2022-04-29 | 2022-04-29 | Battery system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217589316U (en) |
-
2022
- 2022-04-29 CN CN202221037880.6U patent/CN217589316U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102377215B (en) | Combined heating and pre-charging function and hardware for propulsion batteries | |
| CN110303944B (en) | Electric automobile rapid charging system and method | |
| CN108583347B (en) | Equalization circuit for parallel charging and selective single battery discharging equalization and control method thereof | |
| CN101826745B (en) | Lithium ion power battery lossless charger | |
| CN204425003U (en) | A kind of pre-charge circuit and hybrid vehicle | |
| CN1489236A (en) | Automatic balancing device for series storage battery | |
| CN103568861A (en) | Low cost charger circuit with pre-charge functionality | |
| CN110843530B (en) | Multi-module intelligent driving system of large and medium power electric vehicle and large and medium power electric vehicle thereof | |
| CN103824994B (en) | Set of cells application module | |
| IT201900001099A1 (en) | GROUP AND METHOD OF CHARGING AND POWER SUPPLY FOR AN ELECTRIC VEHICLE, AND ELECTRIC VEHICLE INCLUDING THE CHARGING AND POWER UNIT | |
| CN106340917A (en) | Lithium ion power storage battery power source charging and discharging control system for hybrid power system | |
| CN215244378U (en) | Variable voltage platform charge-discharge system and car | |
| CN114030368A (en) | Electric automobile quick charging system and control method thereof | |
| CN218986364U (en) | Power battery system with load protection function | |
| CN112928747A (en) | Power supply circuit, power supply system and vehicle | |
| CN217589316U (en) | Battery system and vehicle | |
| CN218986403U (en) | Power battery system capable of being pre-charged | |
| CN211468190U (en) | A multi-functional controller and new energy automobile for new energy automobile | |
| CN114365375A (en) | Multi-voltage storage system for an at least partially electrically driven vehicle | |
| CN111668888A (en) | Energy storage system of electric car | |
| CN105846507A (en) | Lead-acid battery large current equalization method based on single-chip microcomputer control | |
| WO2023142086A1 (en) | Battery management apparatus and system | |
| CN114268157A (en) | Power battery, power battery series-parallel connection control method and automobile | |
| CN1858934A (en) | Grouping charging and discharging work method for accumulator | |
| CN2922233Y (en) | Over-charging protecting circuit for power lithium ion cell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |