CN216002281U - Power battery system of electric automobile - Google Patents
Power battery system of electric automobile Download PDFInfo
- Publication number
- CN216002281U CN216002281U CN202122349275.4U CN202122349275U CN216002281U CN 216002281 U CN216002281 U CN 216002281U CN 202122349275 U CN202122349275 U CN 202122349275U CN 216002281 U CN216002281 U CN 216002281U
- Authority
- CN
- China
- Prior art keywords
- battery
- bmu
- parallelly connected
- control module
- module
- 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
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides an electric automobile power battery system, includes the parallelly connected incoming end of connecting in proper order, and parallelly connected battery string module of N group, parallel connection incoming end, N are greater than 1, and battery string module is including setting up BMU control module and the parallelly connected incoming end, BMU execution unit, series connection electric core, the parallelly connected incoming end of connecting in proper order of CAN bus. The utility model discloses a parallelly connected power battery system group battery that constitutes of many strings of battery cluster modules, it is more nimble to make the group battery configuration, guaranteed that each other does not influence and can drop into at any time and withdraw from the group battery between the battery cluster module, the parallelly connected flexibility of battery cluster module has been increased, the new energy automobile's of being convenient for energy recuperation has improved the mileage of continuing a journey, make electric automobile operation safe and reliable more, reached maintenance simple and convenient, the nimble swift purpose of charge mode, whole car life has been improved greatly, there are fine economic benefits and social simultaneously.
Description
Technical Field
The utility model belongs to the technical field of the new energy automobile technique and specifically relates to, especially, relate to an electric automobile power battery system who uses on electric automobile.
Background
With the development of new energy automobiles, as clean energy automobiles, the main energy of electric automobiles is power batteries, in order to meet the high power application requirements of electric automobiles, a power battery system composed of hundreds of power batteries is generally adopted in the prior art to supply power to the electric automobiles, and two ways are generally adopted: firstly, a hundred of high-capacity batteries are connected in series, and secondly, a plurality of hundreds of low-capacity batteries are connected in parallel and then connected in series to form a high-capacity battery pack, but the battery pack has the following defects: that is, because of the defects of the manufacturing process of power batteries, it is difficult to ensure that all batteries in a power battery system maintain high consistency, during the use process, some batteries may be in an overcharged or overdischarged state, and the batteries in an overcharged or overdischarged state for a long time are easily damaged, thereby affecting the use of the whole battery pack, so that both of the above two connection modes of the power batteries have fatal defects, namely, any single body in the series connection link has a problem, which affects the endurance mileage of the whole vehicle, even can not be used, once the battery pack has any problem, only the power battery can be pulled to a professional maintenance factory for maintenance, which wastes time and labor, and affects the working life, and the power batteries composed by the two modes in the prior art have the problem of being incapable of being charged for a long time, therefore, in the prior art, a plurality of battery string modules are adopted, the power battery pack is formed by connecting batteries in parallel and is applied to an electric automobile, so that the problems of safe and reliable operation, simple and convenient maintenance, charging time reduction and the like of the electric automobile are solved, however, when the power battery pack for the electric automobile is formed by connecting a plurality of batteries in series and parallel, the battery strings can be charged and discharged mutually, the battery strings with good health condition can continuously supplement energy to the lagging battery strings, namely once the lagging battery strings appear in the battery pack, the health condition of the whole battery pack is rapidly reduced, and the continuation of the journey is difficult to maintain.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned defect and the problem of prior art, the utility model aims to solve the technical problem that an electric automobile power battery system is provided, a plurality of battery clusters are fit for parallelly connecting as power battery system, for electric automobile provides effectual use power battery, move safe and reliable, maintenance simple and convenient, the flexible swift of charge mode, make electric automobile more have popularization meaning.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides an electric automobile power battery system, includes the parallelly connected incoming end that connects in order, and parallelly connected battery string module of N group, parallel connection incoming end, N are greater than 1, battery string module, including BMU control module and the parallelly connected incoming end, BMU execution unit, series connection electric core, the parallelly connected incoming end that connect in order that sets up the CAN bus, BMU execution unit establishes ties including the charging control module, the discharge control module and the current sampling component that establish ties in order, BMU control module connects BMU execution unit and series connection electric core respectively, the series connection electric core includes that two at least electric cores establish ties and form.
In the above technical solution, the method further comprises the step of connecting the (N + 1) th group of battery string modules in parallel.
In the technical scheme, the charging control module is composed of a non-return diode parallel charging switch, and the discharging control module is composed of a non-return diode parallel discharging switch.
In the technical scheme, the BMU control unit is respectively connected with a current sampling element of the BMU execution unit and a battery core of a series battery core, and has the functions of single battery voltage sampling, single battery temperature sampling, charge and discharge current sampling, over-voltage and under-voltage alarm and protection, high and low temperature alarm and protection, current limiting protection, charge and discharge state control, balance control and protection, parameter calculation such as SOC (system on chip), data storage, intelligent sorting of data, remote transmission of data and the like.
In the above technical solution, the charge switch and the discharge switch include a dc contactor, a solid-state relay, or a contactless switch.
In the above technical solution, the current sampling element includes a shunt or a hall sensor.
In the technical scheme, the power battery system of the electric automobile is charged in four charging modes:
the single group of the battery strings are charged quickly, and one charging gun is used for charging each group of the battery string modules at the same time, so that the batteries can be charged at the maximum current which can be borne by the batteries, and the problem that the quick charging cannot be realized due to the limitation of the capacity and the number of the charging guns is avoided;
the system is charged quickly, all the battery string modules connected in parallel are charged, and the current is the maximum charging current borne by all the batteries so as to achieve the purpose of quick full charging;
slowly charging, namely charging the battery wholly by using the total battery capacity of 0.1 time or the specific requirements of the battery during slow charging for all the battery string modules connected in parallel;
the selective charging is carried out, the battery string module withdrawn due to the fault is put into use again after being recovered, the capacity lags behind a plurality of battery string modules which need to be independently recharged, or the newly replaced battery string modules need to be independently recharged, and one group or a plurality of groups of battery string modules can be selectively and independently recharged.
The utility model discloses can adopt the parallelly connected power battery system group battery of constituteing of multiunit, replace the mode of current single cluster group battery, every cluster series connection electric core can not limit capacity, not limit the type and carry out parallelly connected use, makes the group battery configuration more nimble. The battery string modules are guaranteed not to be affected by each other, the battery pack can be put into and taken out at any time, and if a problem occurs, the battery string modules can be maintained independently or directly replaced without affecting any use. The flexibility of parallel connection of the battery string modules is increased, the energy recovery of the new energy automobile is facilitated, and the endurance mileage is improved. The speed of the attenuation of the endurance mileage is slowed down, the electric automobile runs more safely and reliably, the purposes of simple and convenient maintenance and flexible and quick charging mode are achieved, the service life of the whole automobile is greatly prolonged, and meanwhile, the electric automobile has good economic and social benefits.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
Fig. 1 is a schematic block diagram of a battery string module of the present invention.
Fig. 2 is a schematic structural diagram of a battery string module according to the present invention.
Fig. 3 is a schematic structural diagram of the utility model.
Wherein: the system comprises a BMU execution unit 1, a serial battery cell 2, a parallel connection input end 3, a current sampling element 4, a BMU control module 5, a battery cell 6, a non-return diode 7, a charging switch 8, a discharging switch 9 and a CAN bus 10.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings of the present invention, and obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
According to fig. 1 to fig. 3, an electric vehicle power battery system shown as an embodiment includes parallel access ends connected in sequence, N sets of parallel battery string modules, and an (N + 1) th set of battery string module are connected in parallel with other battery string modules, where N is greater than 1, and in an embodiment N is 5, the battery string modules include a BMU control module provided with a CAN bus, and a parallel access end, a BMU execution unit, a series battery cell, and a parallel access end connected in sequence, where the BMU control module is respectively connected with the BMU execution unit and the series battery cell, and the series battery cell includes at least two battery cells connected in series.
The BMU execution unit comprises a charging control module, a discharging control module and a current sampling element which are sequentially connected in series, wherein the charging control module is composed of a non-return diode parallel charging switch, and the discharging control module is composed of a non-return diode parallel discharging switch.
The BMU control unit is respectively connected with a current sampling element of the BMU execution unit and an electric core of a series electric core, the series electric core comprises at least two electric cores which are connected in series, a CAN bus arranged by the BMU control unit is a main unit for finishing control and protection actions, data are uploaded to the whole group for communication through the CAN bus, and the BMU control unit has the functions of single cell voltage sampling, single cell temperature sampling, charge and discharge current sampling, over-voltage and under-voltage alarm and protection, high and low temperature alarm and protection, current-limiting protection, charge and discharge state control, balance control and protection, parameter calculation such as SOC (system on chip), data storage, intelligent sorting of data and data remote transmission.
The BMU control module controls the charging switch and the discharging switch to be switched on or switched off through the current sampling element to realize the charging and discharging of the series battery cell, and the charging and discharging process can be independently controlled.
The utility model can complete the switching of the charging and discharging two loops formed by the charging control module and the discharging control module by adjusting the charging switch and the discharging switch, the charging control module is connected with a wiring, namely the charging switch is connected with the charging relay and then connected with the charging anode; the discharging control module is connected with a wiring, namely the charging module and the discharging module are connected in series and then connected to the charging relay and the positive electrode of the motor; the total negative is connected with the negative pole of the motor by serially connecting the battery cores and sequentially connecting the Hall sensor and the main negative relay.
The charging switch and the discharging switch are used for controlling the charging and discharging states, can be realized by a direct current contactor, a solid-state relay or a non-contact switch and are determined according to specific working conditions and actual requirements; the current sampling element is one of a shunt or a Hall sensor, and is determined according to specific working conditions and actual requirements.
The selection of the cells in the series cells can be flexibly configured according to actual needs, the types and the capacities of the cells in each series cell must be consistent, but the capacities of the cells in different battery string modules in the same vehicle can be the same or different, and the types of the batteries can be the same or different according to different using modes.
In actual use, a plurality of groups of battery string modules are connected in parallel, the input ends of the battery string modules are connected in parallel to form the power battery pack of the electric automobile, the output electric energy is used for providing power required in the running process of the automobile, and if the electric core of one battery string module has a problem, the normal running of the whole automobile is not influenced; a group of parallel battery string modules are selected randomly to serve as multifunctional battery string modules, can be used according to spare series battery cores, can be connected in parallel to a battery pack for unified use, can also serve as a power supply with a special function (such as heating or refrigeration) for independent use, and can absorb and store input electric energy generated in the running process of an automobile at any time.
In the embodiment of the power battery system of the electric automobile, the battery pack unit is formed by connecting 5+1 battery string modules in parallel, namely 5 battery string modules are connected in parallel, and then a group of standby battery string modules are connected in parallel, 104 lithium iron phosphate power batteries with the voltage of 3.65V/30Ah are selected for each battery string module, the power of the whole automobile is 56.94kWh +11.388kWh, and the driving mileage of the automobile can reach 400km-450km through one-time charging. If the standby battery string module is added to the whole group of battery packs, the endurance mileage is increased 1/5, and the battery string with the fault can be replaced at any time in a standby mode.
The power battery system of the electric automobile is charged in four charging modes:
the single group of the battery strings are charged quickly, and one charging gun is used for charging each group of the battery string modules at the same time, so that the batteries can be charged at the maximum current which can be borne by the batteries, and the problem that the quick charging cannot be realized due to the limitation of the capacity and the number of the charging guns is avoided;
the system is charged quickly, all the battery string modules connected in parallel are charged, and the current is the maximum charging current borne by all the batteries so as to achieve the purpose of quick full charging;
slowly charging, namely charging the battery wholly by using the total battery capacity of 0.1 time or the specific requirements of the battery during slow charging for all the battery string modules connected in parallel;
the selective charging is carried out, the battery string module withdrawn due to the fault is put into use again after being recovered, the capacity lags behind a plurality of battery string modules which need to be independently recharged, or the newly replaced battery string modules need to be independently recharged, and one group or a plurality of groups of battery string modules can be selectively and independently recharged.
When the electric automobile stops, all the battery string modules are in a shelving state, the self-discharge rates can be distinguished due to the differences of the battery string modules, if the electric automobile stops for a long time, a certain voltage difference exists between each group of battery string modules, and in addition, the maintained battery string modules or newly replaced battery string modules and the original battery string modules also have a certain voltage difference.
Assuming that the voltages of any two groups of battery string modules are V1> V2, and V1 is the terminal voltage of the battery string module 1; the V2 is the terminal voltage of the battery string module 2, because the charging loop and the discharging loop of the two groups of battery string modules are completely independent through the control of the non-return diode and the charging and discharging switch, even if V1 is greater than V2, the battery string module 1 will not charge the battery string module 2, therefore, the two groups of battery string modules will not affect each other when charging or placing, when the electric automobile runs normally (the battery discharges), the battery string module 1 preferentially releases energy to provide the power needed by the whole automobile, when the voltage drops to V1 which is V2, the two groups of battery string modules release energy simultaneously.
In the normal driving process of the electric automobile, the two groups of battery string modules simultaneously provide power, if the capacity of a certain battery cell in the battery string module 1 is insufficient, the BMU1 control unit sends a control command to the BMU1 execution unit to disconnect the discharge switch, the battery string module 1 automatically exits the system, the BMU1 control unit carries out balance processing on the laggard battery cell, after the self-repairing is successful, the closed discharge switch is automatically put into the system, the self-repairing is unsuccessful, the whole automobile power can still drive to the nearest maintenance point to maintain the battery string or replace the whole battery string even if only half of the power remains, and the battery string modules are independent from each other, so the maintenance and the replacement are safer and more convenient.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (6)
1. The utility model provides an electric automobile power battery system which characterized in that: including the parallelly connected incoming end of connecting in proper order, N group parallelly connected battery string module, parallel connection incoming end, N is greater than 1, battery string module, including BMU control module and the parallelly connected incoming end, BMU execution unit, the series connection electric core, the parallelly connected incoming end that set up the CAN bus, BMU execution unit including the series connection of order charging control module, discharge control module and current sampling component series connection, BMU control module connects BMU execution unit and series connection electric core respectively, the series connection electric core includes that two at least electric cores establish ties and form.
2. The electric vehicle power battery system of claim 1, wherein: the system also comprises an N +1 th battery string module which is connected in parallel.
3. The power battery system of the electric vehicle according to claim 1 or 2, wherein: the charging control module is composed of a non-return diode parallel charging switch, and the discharging control module is composed of a non-return diode parallel discharging switch.
4. The electric vehicle power battery system of claim 3, wherein: and the BMU control module is respectively connected with a current sampling element of the BMU execution unit and a battery cell of the series battery cell.
5. The electric vehicle power battery system of claim 4, wherein: the current sampling element comprises a shunt or a hall sensor.
6. The electric vehicle power battery system of claim 5, wherein: the charging switch and the discharging switch comprise direct current contactors, solid state relays or contactless switches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122349275.4U CN216002281U (en) | 2021-09-27 | 2021-09-27 | Power battery system of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122349275.4U CN216002281U (en) | 2021-09-27 | 2021-09-27 | Power battery system of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216002281U true CN216002281U (en) | 2022-03-11 |
Family
ID=80584304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122349275.4U Active CN216002281U (en) | 2021-09-27 | 2021-09-27 | Power battery system of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216002281U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715689A (en) * | 2021-09-27 | 2021-11-30 | 哈尔滨莫翠科技有限公司 | Power battery system of electric automobile |
-
2021
- 2021-09-27 CN CN202122349275.4U patent/CN216002281U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113715689A (en) * | 2021-09-27 | 2021-11-30 | 哈尔滨莫翠科技有限公司 | Power battery system of electric automobile |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111431231B (en) | Battery grouping architecture based on flexible connection and redundancy | |
| CN102754301A (en) | Power supply device | |
| CN108336780B (en) | Control method and system for gradient utilization of battery pack | |
| CN109659465A (en) | A kind of battery strings module of electric automobile power battery system | |
| CN108667107B (en) | Storage battery pack equalization circuit comprising auxiliary battery and control method | |
| CN112018862A (en) | Rechargeable battery for transformer substation, rechargeable power supply, secondary system, transformer substation and method | |
| CN209534757U (en) | A kind of electric automobile power battery system | |
| CN205646972U (en) | Zero incessant circulation safety fast switch over group battery | |
| CN114977381A (en) | Energy storage system control circuit with multiple parallel battery clusters and control method thereof | |
| CN208570836U (en) | Under peak load shifting operating condition in communication base station multiple groups battery charge-discharge control system | |
| CN216002281U (en) | Power battery system of electric automobile | |
| CN102545322A (en) | Battery module, power supply system and battery power supply control method | |
| CN112865261B (en) | Energy storage battery, application device thereof and charge and discharge control method | |
| CN109649191A (en) | A kind of electric automobile power battery system | |
| CN111463852A (en) | Control method for equalizing charge of battery pack | |
| CN216184633U (en) | Battery string module for power battery system of electric automobile | |
| CN110854954A (en) | Intelligent scheduling system and scheduling method for battery cluster of energy storage system | |
| CN112803578A (en) | Intelligent distribution network power supply module and management method | |
| CN113715689A (en) | Power battery system of electric automobile | |
| CN209930016U (en) | Energy storage power station | |
| CN114844172A (en) | Battery switching system for unmanned vehicle | |
| CN114552726A (en) | New energy multi-source input low-voltage power distribution system supporting wireless communication | |
| CN113715688A (en) | Battery string module for power battery system of electric automobile | |
| CN212085824U (en) | Parallel control circuit for echelon utilization of power storage battery module | |
| CN114268147A (en) | Energy storage battery management method and system and energy storage battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |