CN114256519A - Battery module loop control device and method, battery assembly and electric vehicle - Google Patents
Battery module loop control device and method, battery assembly and electric vehicle Download PDFInfo
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- CN114256519A CN114256519A CN202111450473.8A CN202111450473A CN114256519A CN 114256519 A CN114256519 A CN 114256519A CN 202111450473 A CN202111450473 A CN 202111450473A CN 114256519 A CN114256519 A CN 114256519A
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000004891 communication Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/581—Devices or arrangements for the interruption of current in response to temperature
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2220/00—Batteries for particular applications
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery module loop control device and method, a battery assembly and an electric vehicle, belonging to the technical field of power battery control. The invention discloses a battery module loop control device and method, a battery assembly and an electric vehicle.A Battery Management System (BMS) judges the request state of a battery module, can reduce the voltage of the battery in the thermal runaway state of the battery, avoids the arc discharge of an internal high-voltage loop, improves the safety performance, can reduce the voltage of the battery in the quick charge of the battery, forms two small battery loops, can be connected with two charging devices, and improves the charging efficiency to two times of the original charging efficiency.
Description
Technical Field
The invention discloses a battery module loop control device and method, a battery assembly and an electric vehicle, and belongs to the technical field of power battery control.
Background
At present, the development prospect of new energy automobiles is very wide. The new energy automobile has the advantages of high energy efficiency, zero emission, no pollution, high specific energy, low noise, high reliability and the like. The power battery system is used as a main energy storage component of the new energy battery vehicle, and mainly ensures the functions of driving of the whole vehicle, the power demand of high-low voltage components, braking energy recovery, energy regulation of a hybrid power engine system and the like. The safety of a power battery assembly is always the key of the quality of the power battery assembly, a series of safety problems of the battery assembly and the problem of low charging speed of an electric vehicle are brought along with the rapid development of the demand of the battery assembly with high energy and high power, after the thermal runaway of the lithium ion battery occurs at present, because the assembly voltage is too high (300-600V), high-voltage arc discharge is easily formed, severe explosion and combustion are generated, how to prevent the high-voltage arc discharge after the thermal runaway is an industrial problem, and at present, because of the limitation of the charging power, the lithium ion power battery cannot realize super rapid charging.
Disclosure of Invention
The invention aims to solve the problems of thermal runaway high-voltage arc discharge of the existing battery and incapability of quick charging due to the limitation of charger power, and provides a battery module loop control device, a battery module loop control method, a battery assembly and an electric vehicle.
The invention aims to solve the problems and is realized by the following technical scheme:
the utility model provides a battery module loop control device, its characterized in that, is including setting up battery module and the high-pressure four-way controller in the battery box, battery module and high-pressure four-way controller electric connection, battery module and high-pressure four-way controller carry out the communication with BMS battery management system respectively and are connected.
Preferably, the battery module comprises at least one pair of first battery module and a second battery module which are symmetrically arranged in a battery box body, the high-voltage four-way controller comprises two rotary switches and two steering engines which are arranged in a controller shell, output shafts of the two steering engines are respectively connected with rotating shafts of the two rotary switches, pins are respectively arranged on two sides of the controller shell, the battery module is respectively connected with the pins, the two steering engines are respectively electrically connected with a BMS battery management system, third ends of the two rotary switches are respectively connected together through a connecting plate, first ends and fourth ends of the two rotary switches are respectively electrically connected with the pins, and the BMS battery management system can control the high-voltage four-way controller (1) through electric signals to realize the state and switching of multiple modes.
Preferably, the pins include a second input pin and a third input pin respectively connected to the first ends of the two rotary switches, and a second output pin and a third output pin respectively connected to the fourth ends of the two rotary switches, and the pins further include a first input pin and a first output pin that are communicated with each other, and a fourth input pin and a fourth output pin that are communicated with each other.
Preferably, the positive electrode and the negative electrode of the first battery module are electrically connected with the first input pin and the second input pin respectively, and the positive electrode and the negative electrode of the second battery module are in communication connection with the third input pin and the fourth input pin respectively.
A battery module loop control method comprises the following steps:
when a BMS battery management system receives a loop regulation request, acquiring request data in the loop regulation request;
identifying the request data, and determining a regulation loop event corresponding to the request data, wherein the regulation loop event comprises: thermal runaway and direct current quick charging;
and generating a steering engine control command according to the adjustment loop items, and sending the steering engine control command to the two steering engines to execute corresponding rotation operation.
Preferably, when the loop adjusting event is thermal runaway, the steering engine control command is to rotate to the second end position of the rotary switch, so as to disconnect the high voltage.
Preferably, when the event of the regulation loop is dc fast charging, it is further determined whether super fast charging is required:
if not, the steering engine control command is no action;
and the steering engine control instruction is that the steering engine is rotated to the fourth end position of the rotary switch to form two high-voltage loops for quick charging, and whether the original loop is recovered or not is judged according to two high-voltage pressure differences.
Preferably, steering wheel control command is for rotating to rotary switch's fourth end position, forms two way high-pressure circuit and fills soon and judge whether resume original circuit through two way high-pressure differential pressure, includes:
the steering engine control instruction is that the steering engine control instruction rotates to the fourth end position of the rotary switch to form two high-voltage loops for quick charging;
acquiring the voltages of the two high-voltage loops and determining the differential pressure of the two high-voltage loops;
judging whether the pressure difference of the two high-pressure loops is qualified or not:
if yes, the steering engine control command is to restore the original loop to rotate to the third end position of the rotary switch;
and if not, loop balancing is carried out and the previous step is repeated until the quality is qualified.
A battery assembly comprises the battery module loop control device, the CSC acquisition system, the battery control unit and the battery high-voltage distribution unit, wherein the battery module loop control device is electrically connected with the CSC acquisition system, the battery control unit and the battery high-voltage distribution unit respectively.
An electric vehicle includes a vehicle body and the battery assembly of any of the above aspects.
Compared with the prior art, the invention has the following beneficial effects:
the invention discloses a battery module loop control device, a battery module loop control method, a battery assembly and an electric vehicle, which judge the request state of a battery module through a BMS battery management system, when the battery module requests the state to be thermal runaway, the high-voltage four-way controller can realize the disconnection of the voltage loop of the whole battery pack and reduce the voltage of the whole high-voltage loop to 0V, thereby reducing the voltage of the battery in the thermal runaway state of the battery, avoiding the arc discharge of an internal high-voltage loop, improving the safety performance, when the battery module requests the state of direct current quick charging, the high-voltage four-way controller equally divides the voltage loop of the whole battery module into two parts to reduce the voltage of the assembly, and through judging the pressure difference and recovering, can reduce battery voltage when the battery fills soon through this function, form two little battery return circuits, can link to each other with two battery charging outfits, promote charge efficiency to original twice.
Drawings
Fig. 1 is an electrical connection diagram of a battery module loop control device according to the present invention.
Fig. 2 is a top view of a high voltage four-way controller in the battery module loop control device of the present invention.
Fig. 3 is a front view of a high voltage four-way controller in a battery module loop control apparatus according to the present invention.
Fig. 4 is a schematic structural diagram of a controller housing of a high-voltage four-way controller in a battery module loop control device according to the present invention.
Fig. 5 is a schematic diagram of electrical connection in a normal state in the battery module loop control device according to the present invention.
FIG. 6 is a flowchart illustrating a method for controlling a circuit of a battery module according to the present invention.
Fig. 7 is a schematic diagram of electrical connection in a thermal runaway state in a battery module loop control device according to the present invention.
Fig. 8 is a schematic diagram of electrical connection in a dc fast charging state in the battery module loop control apparatus according to the present invention.
The battery management system comprises a 1-high-voltage four-way controller, a 11-rotary switch, a 12-steering engine, a 13-connecting plate, a 14-controller shell, a 141-controller cover, a 142-controller shell, a 15-pin, a 151-first input pin, a 152-second input pin, a 153-third input pin, a 154-fourth input pin, a 155-fourth output pin, a 156-third output pin, a 157-second output pin, a 158-first output pin, a 2-BMS battery management system, a 3-battery box, a 4-battery box, a 41-first battery module and a 42-second battery module.
Detailed Description
The invention is further illustrated below with reference to the accompanying figures 1-7:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a first embodiment of the present invention provides a battery module circuit control device based on the prior art, which is characterized by comprising: the battery pack comprises a high-voltage four-way controller 1, a BMS battery management system 2, a battery box 3 and a battery module 4, wherein the battery module 4 and the high-voltage four-way controller 1 are installed in the battery box 3, the battery module 4 is electrically connected with the high-voltage four-way controller 1, the battery module 4 and the high-voltage four-way controller 1 are respectively electrically connected with the BMS battery management system 2, and the structure and the corresponding electrical connection relationship of the above-mentioned components are described in detail.
The battery module 4 includes at least one pair of a first battery module 41 and a second battery module 42 symmetrically disposed in the battery box 3, the first battery module 41 and the second battery module 42 have the same structure and respectively include at least one lower electric core, and each battery module in this embodiment is formed by connecting 6 electric cores in series.
The high-voltage four-way controller 1 is shown in fig. 2-4, and comprises: controller casing 14, two rotary switch 11, two steering wheel 12, connecting plate 13 and establish pin 15 at controller casing 14 both sides, controller casing 14 includes controller lid 141 and the controller shell body 142 of mutual lock, two rotary switch 11 and two steering wheel 12 are symmetry respectively installed in controller casing 14, the output shaft of two steering wheel 12 passes through the coupling joint with two rotary switch 11's pivot respectively, two steering wheel 12 respectively with BMS battery management system 2 electric connection, the third end of two rotary switch 11 links together through connecting plate 13 respectively, two steering wheel 12 can drive two rotary switch 11 rotations respectively.
The pin 15 includes: the first battery module 41 comprises a first input pin 151, a second input pin 152, a third input pin 153, a fourth input pin 154, a first output pin 158, a second output pin 157, a third output pin 156 and a fourth output pin 155, wherein the first input pin 151 and the first output pin 158 are communicated, the fourth input pin 154 and the fourth output pin 155 are communicated, the second input pin 152 and the third input pin 153 are connected with first ends of two rotary switches 11, the second output pin 157 and the third output pin 156 are respectively connected with fourth ends of the two rotary switches 11, positive and negative poles of the first battery module 41 are respectively electrically connected with the first input pin 151 and the second input pin 152, and positive and negative poles of the second battery module 42 are respectively electrically connected with the third input pin 153 and the fourth input pin 154. In the initial state, as shown in fig. 5, the two rotary switches 11 are in the on state, that is, both rotary switches 11 are rotated to the position of the third terminal.
Having described the above description of a battery module circuit control apparatus, the following description of a control method thereof, as shown in fig. 6, includes:
when the BMS battery management system receives a loop adjustment request, acquiring request data in the loop adjustment request;
identifying the request data, and determining a regulation loop event corresponding to the request data, wherein the regulation loop event comprises: thermal runaway and direct current quick charging;
and generating a steering engine control command according to the adjustment loop items, and sending the steering engine control command to the two steering engines 12 to execute corresponding rotation operation.
When the loop regulation event is thermal runaway, the circuit at this time is as shown in fig. 7, and the steering engine control command is to rotate to the second end position of the rotary switch 11, so as to cut off the high voltage.
When the adjustment loop item is the direct current fast charging, further judging whether super fast charging is needed:
if not, the steering engine control command is no action;
if the steering engine control instruction is that the steering engine rotates to the fourth end position of the rotary switch 11, a circuit at the moment is shown in fig. 8, and two high-voltage loops are formed for quick charging;
acquiring two high-voltage loop voltages and determining the pressure difference of the two high-voltage loops;
judging whether the pressure difference of the two high-pressure loops is qualified or not:
if yes, the steering engine control command is to restore the original loop to rotate to the third end position of the rotary switch 11;
and if not, loop balancing is carried out and the previous step is repeated until the quality is qualified.
A second embodiment of the present invention is a battery assembly, which includes the battery module loop control device, the CSC collection system, the battery control unit, and the battery high-voltage distribution unit of the first embodiment, wherein the battery module loop control device is electrically connected to the CSC collection system, the battery control unit, and the battery high-voltage distribution unit, respectively.
A third embodiment of the invention is an electric vehicle including a vehicle body and a battery assembly mounted on the vehicle body.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (10)
1. The utility model provides a battery module loop control device, its characterized in that, including battery module (4) and high-pressure four-way controller (1) of setting in battery box (3), battery module (4) and high-pressure four-way controller (1) electric connection, battery module (4) and high-pressure four-way controller (1) carry out the communication with BMS battery management system (2) respectively and are connected.
2. The battery module loop control device according to claim 1, wherein the battery module (4) comprises at least one pair of a first battery module (41) and a second battery module (42) which are symmetrically arranged in a battery box body (3), the high-voltage four-way controller (1) comprises two rotary switches (11) and two steering engines (12) which are arranged in a controller shell (14), output shafts of the two steering engines (12) are respectively connected with rotating shafts of the two rotary switches (11), pins (15) are respectively arranged on two sides of the controller shell (14), the battery module (4) is respectively connected with the pins (15), the two steering engines (12) are respectively electrically connected with the BMS battery management system (2), third ends of the two rotary switches (11) are respectively connected together through a connecting plate (13), the first end and the fourth end of the two rotary switches (11) are respectively electrically connected with the pins (15), and the BMS battery management system (2) can control the high-voltage four-way controller (1) through electric signals to realize the states and switching of multiple modes.
3. The battery module loop control device according to claim 2, wherein the pins (15) comprise a second input pin (152) and a third input pin (153) respectively connected with the first ends of the two rotary switches (11) and a second output pin (157) and a third output pin (156) respectively connected with the fourth ends of the two rotary switches (11), and the pins (15) further comprise a first input pin (151) and a first output pin (158) which are communicated with each other and a fourth input pin (154) and a fourth output pin (155) which are communicated with each other.
4. The device as claimed in claim 3, wherein the positive and negative poles of the first battery module (41) are electrically connected to the first input pin (151) and the second input pin (152), respectively, and the positive and negative poles of the second battery module (42) are in communication connection with the third input pin (153) and the fourth input pin (154), respectively.
5. A battery module loop control method is characterized by comprising the following steps:
when a loop adjusting request is received, request data in the loop adjusting request is obtained;
identifying the request data, and determining a regulation loop event corresponding to the request data, wherein the regulation loop event comprises: thermal runaway and direct current quick charging;
and generating a steering engine control command according to the adjustment loop item, and sending the steering engine control command to the two steering engines (12) to execute corresponding rotation operation.
6. The battery module loop control method according to claim 5, wherein when the adjustment loop event is thermal runaway, the steering engine control command is to rotate to the second end position of the rotary switch (11) to turn off the high voltage.
7. The method as claimed in claim 5, wherein when the loop adjustment event is dc fast charge, further determining whether super fast charge is required:
if not, the steering engine control command is no action;
and the steering engine control instruction is that the steering engine rotates to the fourth end position of the rotary switch (11) to form two high-voltage loops for quick charging and judges whether to recover the original loop or not according to two high-voltage pressure differences.
8. The battery module circuit control method according to claim 7, wherein the steering engine control command is to rotate to a fourth end position of the rotary switch (11) to form two high-voltage circuits for quick charge and judge whether to recover the original circuit through two high-voltage pressure differences, and the method comprises the following steps:
the steering engine control instruction is that the steering engine control instruction rotates to the fourth end position of the rotary switch (11) to form two paths of high-voltage loops for quick charging;
acquiring the voltages of the two high-voltage loops and determining the differential pressure of the two high-voltage loops;
judging whether the pressure difference of the two high-pressure loops is qualified or not:
if yes, the steering engine control command is to restore the original loop to rotate to the third end position of the rotary switch (11);
and if not, loop balancing is carried out and the previous step is repeated until the quality is qualified.
9. A battery assembly comprising the battery module loop control device, the CSC collection system, the battery control unit and the high-voltage battery distribution unit according to any one of claims 1 to 4, wherein the battery module loop control device is electrically connected to the CSC collection system, the battery control unit and the high-voltage battery distribution unit, respectively.
10. An electric vehicle characterized by comprising a vehicle body and the battery assembly according to claim 9.
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| CN202111450473.8A CN114256519B (en) | 2021-11-30 | 2021-11-30 | Battery module loop control device and method, battery assembly and electric vehicle |
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| CN202111450473.8A CN114256519B (en) | 2021-11-30 | 2021-11-30 | Battery module loop control device and method, battery assembly and electric vehicle |
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| CN114256519B CN114256519B (en) | 2024-04-09 |
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Cited By (1)
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| WO2024055586A1 (en) * | 2022-09-15 | 2024-03-21 | 中国第一汽车股份有限公司 | Alternating-current power battery assembly and control method |
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|---|---|
| CN114256519B (en) | 2024-04-09 |
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