CN111923750B - Power lithium battery system - Google Patents
Power lithium battery system Download PDFInfo
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- CN111923750B CN111923750B CN202010742235.3A CN202010742235A CN111923750B CN 111923750 B CN111923750 B CN 111923750B CN 202010742235 A CN202010742235 A CN 202010742235A CN 111923750 B CN111923750 B CN 111923750B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L1/00—Supplying electric power to auxiliary equipment of vehicles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/24—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries
- B60L58/27—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries for controlling the temperature of batteries by heating
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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
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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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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Sustainable Energy (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to a power lithium battery system. Comprises a box body, a power battery module, a heating component PTC, a power battery module bracket assembly, a high-voltage copper bar and an automatic fire extinguishing device, wherein the power battery module, the heating component PTC, the power battery module bracket assembly, the high-voltage copper bar and the automatic fire extinguishing device are arranged in the box body; the box body comprises a lower power battery box body, an upper power battery box body, a hanging ring and a high-voltage main control box of the power battery; the power battery module bracket assembly is fixed in the lower power battery box body; the power battery upper box body is fixed on the power battery lower box body through a first bolt; the power battery high-voltage main control box is fixed on the power battery upper box body through a second bolt; the hanging ring penetrates through the upper box body of the power battery and is fixed on the power battery module bracket assembly; the power battery module and the automatic fire extinguishing device are both fixed on the power battery module bracket assembly; the high-voltage copper bar is connected with an electrode of the power battery module; the PTC heating components are fixed on the side walls of the two sides of the power battery module. The invention can improve the space utilization rate of the whole vehicle, improve the battery pack capacity and increase the driving range of the whole vehicle.
Description
Technical Field
The invention belongs to the technical field of automobiles, and particularly relates to a power lithium battery system.
Background
Currently, the electric drive of the automobile industry is a necessary trend, and various automobiles are developed towards the electric drive, wherein the automobiles comprise passenger automobiles, commercial automobiles (trucks and buses), special automobiles (engineering automobiles and special-purpose automobiles), low-speed scooter and the like.
Most of electric special vehicles are applied to commercial scenes, the whole vehicle is limited by environmental protection requirements, functional and performance requirements and the like, and compared with other vehicles, considerable economic benefits can be brought, and meanwhile, the sensitivity of the electric special vehicle to the battery cost is slightly low, so that the electric special vehicle is popular in the field.
The power lithium battery system of the general special vehicle mainly comprises a battery cell, a module, a structural member, a heating component, a copper bar, a wire harness, a battery management unit BMU, a distribution box, a charging interface, a discharging interface and other components, the voltage of the general power battery can be realized in a series-parallel combination mode according to the whole vehicle requirement, and the low-voltage component generally needs to be externally connected with a 12V or 24V lead-acid storage battery for power supply.
Disclosure of Invention
The invention provides a power lithium battery system with a simple structure, which can improve the space utilization rate of the whole vehicle, improve the battery pack capacity, increase the driving range of the whole vehicle, and is internally provided with DC/DC, so that the total voltage of the power lithium batteries after being connected in series and parallel can be converted into 12V or 24V output to supply power to battery BMU and the like, thereby saving the cost and space of an external lead-acid storage battery and solving the defects of the traditional power lithium battery system.
The technical scheme of the invention is as follows in combination with the accompanying drawings:
a power lithium battery system comprises a box body, a power battery module 7, a heating component PTC8, a power battery module bracket assembly 9, a high-voltage copper bar 10 and an automatic fire extinguishing device 11, wherein the power battery module 7, the heating component PTC8, the power battery module bracket assembly 9 and the automatic fire extinguishing device 11 are arranged in the box body; the box body comprises a lower power battery box body 1, an upper power battery box body 2, a hanging ring 3 and a high-voltage total power battery control box 5; the power battery module bracket assembly 9 is fixed in the power battery lower box body 1; the power battery upper box body 2 is fixed on the power battery lower box body 1 through a first bolt 4; the power battery high-voltage main control box 5 is fixed on the power battery upper box body 2 through a second bolt 6; the four hanging rings 3 penetrate through four corners of the upper box body 2 of the power battery and are fixed on the power battery module support assembly 9; the power battery module 7 and the automatic fire extinguishing device 11 are both fixed on the power battery module bracket assembly 9; the high-voltage copper bar 10 is connected with an electrode of the power battery module 7; the heating components PTC8 are fixed on the side walls of the two sides of the power battery module 7.
The power battery module support assembly 9 comprises a first support frame 901, a second support frame 902, a support column 903, a hoisting support column 904, an automatic fire extinguishing device support 905, a lower box connecting support 906, a first connecting cushion block 907, a second connecting cushion block 908 and a module support plate 909; the planes of the first support frame 901 and the second support frame 902 are parallel; the second connection pad 908 is welded with the support post 903 into a whole and then welded on the first support frame 901; the first connecting cushion block 907 is fixed on the support column 903 and the second support frame 902 through bolts; the lower end of the lifting support column 904 is welded on the first connecting cushion block 907, and the upper end is in threaded connection with the lifting ring 3; the automatic fire extinguishing apparatus bracket 905 is fixed on the second support frame 902 through bolts; the automatic fire extinguishing device 11 is fixed on an automatic fire extinguishing device bracket 905; a lower box connecting bracket 906 is fixed on the lifting support column 904; the power battery module support assembly 9 is welded with the power battery lower box 1 through the lower box connecting support 906.
The first support frame 901 and the second support frame 902 are respectively provided with a module support plate; the power battery module 7 is fixed on the module support plate.
And an adhesive with the equal thickness of 2mm is smeared between the bottom of the power battery module 7 and the module supporting plate.
The power battery module 7 is formed by connecting battery cells in series and parallel; the power battery modules 7 are connected in series and parallel through the high-voltage copper bars 10 to externally output a battery positive high-voltage interface and a battery negative high-voltage interface, and are input into the battery high-voltage master control box 5.
The front side of the power battery high-voltage general control box 5 is sequentially provided with a power supply positive electrode output 501 and a power supply negative electrode output 502, the rear side is sequentially provided with a first quick-charging positive electrode 503, a first quick-charging negative electrode 504, a second quick-charging positive electrode 505, a second quick-charging negative electrode 506 and a high-voltage starting switch 507, and the right side is provided with a low-voltage interface 508.
The power battery high-voltage main control box 5 is internally provided with a battery pack, a power conversion module, namely DC/DC, a battery pack management module BMU and 10 high-voltage branches; the low-voltage sampling circuit of the power battery module 7 is connected with the battery pack management module BMU; the battery pack management module BMU supplies power by converting the high voltage of the power battery system into 12V or 24V through a power conversion module, namely DC/DC; the positive high-voltage interface of the battery pack is connected to the positive high-voltage interface of the high-voltage main control box 5 through a wire harness, and the negative high-voltage interface of the battery pack is connected to the negative high-voltage interface of the high-voltage main control box 5 through a wire harness; the positive electrode of the battery core in the battery pack is output to a battery positive electrode high-voltage interface, and the negative electrode is output to a battery negative electrode high-voltage interface; the positive electrode and the negative electrode of the heating component PTC8 inside the battery pack are respectively connected to the battery PTC high-voltage interface and connected to the PTC high-voltage interface of the high-voltage master control box 5 through a wire harness.
The high-voltage branches are respectively branches 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 in the high-voltage master control box; the branch 1 in the high-voltage main control box is a main positive circuit, the main positive circuit is connected with a 630A high-voltage fuse and a 350A main positive relay in series, and meanwhile, a 20A pre-charge relay and a 30Ω pre-charge resistor are connected in parallel on the branch to form a pre-charge circuit, and finally, the pre-charge circuit is connected to a power supply positive electrode output 501 connector; the branch circuit 2 in the high-voltage master control box is a first fast charging positive pole loop, the first fast charging positive pole loop is connected with a 630A high-voltage fuse and a 250A fast charging relay 1 in series, and finally is connected to a first fast charging positive pole 503 output connector; the branch circuit 3 in the high-voltage main control box is a second fast-charging positive pole loop; the second fast charge positive pole loop is connected with the 630A high voltage fuse and the 250A fast charge relay 2 in series, and finally is connected to the second fast charge positive pole 505 output connector; the branch circuit 4 in the high-voltage master control box is a main negative circuit, and the main negative circuit is connected with a 350A main negative relay in series and finally connected to a power supply negative electrode output 502 connector; the branch circuit 5 in the high-voltage master control box is a first fast charge negative electrode loop, and the first fast charge negative electrode loop is connected with the 250A fast negative relay 1 in series and finally connected to a first fast charge negative electrode 504 connector; the branch circuit 6 in the high-voltage master control box is a second fast charge negative electrode loop, and the second fast charge negative electrode loop is connected with the 250A fast negative relay 2 in series and finally connected to a second fast charge negative electrode 506 connector; the branch circuit 7 in the high-voltage master control box is a first high-voltage starting circuit loop, the first high-voltage starting circuit loop is connected with a 630A high-voltage fuse and a 20A high-voltage fuse in series, and finally is connected to one end of a connector of the high-voltage starting switch 507; the branch circuit 8 in the high-voltage main control box is a second high-voltage starting circuit loop, and the second high-voltage starting circuit loop is connected with a power conversion module, namely DC/DC in series and finally connected to the other end of the connector of the high-voltage starting switch 507; the branch 9 in the high-voltage total control box is a heating component PTC positive pole loop, and the heating component PTC positive pole loop is connected with a 100A high-voltage fuse and a 50A PTC relay 1 in series, and is connected with a 100A high-voltage fuse and a 50A PTC relay 2 in parallel; the branch circuit 10 in the high-voltage master control box is a heating component, namely a PTC negative electrode loop, and the heating component, namely the PTC negative electrode loop, is directly connected with the main negative loop in parallel.
And the contact surface of the upper power battery box body 2 and the high-voltage total power battery control box 5 is coated with sealant.
The power battery upper box body 2 and the power battery high-voltage main control box 5 are provided with holes for connecting wire harnesses.
The beneficial effects of the invention are as follows:
1) The built-in DC/DC can be converted into 12V or 24V output through the total voltage after the series-parallel connection of the power lithium batteries, so as to supply power to batteries BMU and the like, and the cost and the space of an external lead-acid storage battery are saved;
2) The invention is added with the manual high-voltage starting switch, so that the power failure of the power battery system can be manually controlled, and the power battery feeding caused by long-time parking of a special vehicle is avoided;
3) The BMU and the DC/DC are positioned in the high-voltage main control box, so that the BMU and the DC/DC are convenient to disassemble, maintain and replace in the later period, and the working hours are reduced;
4) The invention meets the special requirements of special vehicles such as large capacity, quick charge and the like, and provides the working principle of a double-loop quick charge battery system, each quick charge loop can charge a battery pack independently, and two quick charge loops can charge the battery pack simultaneously, so that the battery charging time can be greatly shortened as a whole, the charging waiting time of the special vehicle is reduced, and the economic benefit is improved;
5) The invention provides a double-layer module arrangement structure, which improves the space utilization rate of the whole vehicle, improves the battery pack capacity, increases the driving range of the whole vehicle and improves the economic benefit of a special vehicle;
6) The invention provides a double fixing scheme of adopting an adhesive to fix the bottom of a module and a battery box body and adopting a bolt connection between the battery module and the battery box body, so as to improve the structural stability and vibration resistance of a power battery system and further improve the safety of the battery system;
7) Compared with the prior battery structure which utilizes a lower box body to directly bear load, the invention adopts a frame type bearing scheme consisting of two layers of supporting frames, supporting columns and lifting columns, can bear larger weight, and reduces the complexity of the battery box body, thereby reducing the overall cost of the battery structural member and reducing the processing and manufacturing difficulty.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings to be used in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a power cell system;
FIG. 2 is a schematic diagram of a power cell system;
FIG. 3 is a schematic diagram of a high voltage master control box interface in a power battery system;
FIG. 4 is a schematic diagram of the internal structure of the power cell system;
FIG. 5 is a schematic diagram of a power battery module bracket assembly;
fig. 6 is a schematic diagram of a power battery module bracket assembly.
In the figure: 1. a lower box body of the power battery; 2. an upper case of the power battery; 3. a hanging ring; 4. a first bolt; 5. a power battery high-voltage master control box; 6. a power battery high-voltage master control box; 7. a power battery module; 8. a heating assembly PTC; 9. a power battery module bracket assembly; 10. high-voltage copper bars; 11. an automatic fire extinguishing device; 501. the positive electrode of the power supply is output; 502. a negative electrode of the power supply is output; 503. a first fast charge positive electrode; 504. a first fast charge anode; 505. a second fast charge positive electrode; 506. a second fast charge anode; 507. a high voltage start switch; 508. a low voltage interface; 901. a first support frame; 902. a second support frame; 903. a support column; 904. hoisting the support column; 905. a self-extinguishing device bracket; 906. the lower box body is connected with a bracket; 907. a first connecting pad; 908. the second connecting cushion block; 909. and a module support plate.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.
Referring to fig. 2 and 4, a power lithium battery system comprises a box body, a power battery module 7, a heating component PTC8, a power battery module bracket assembly 9, a high-voltage copper bar 10 and an automatic fire extinguishing device 11, wherein the power battery module 7, the heating component PTC8, the power battery module bracket assembly 9, the high-voltage copper bar 10 and the automatic fire extinguishing device 11 are arranged in the box body; the box body comprises a power battery lower box body 1, a power battery upper box body 2, a hanging ring 3 and a power battery high-voltage general control box 5.
The power battery module bracket assembly 9 is fixed in the power battery lower box body 1; the power battery upper box body 2 is fixed on the power battery lower box body 1 through a first bolt 4; the power battery high-voltage main control box 5 is fixed on the power battery upper box body 2 through a second bolt 6; the power battery module 7 and the automatic fire extinguishing device 11 are both fixed on the power battery module bracket assembly 9; the high-voltage copper bar 10 is connected with an electrode of the power battery module 7; the heating assemblies PTC8 are fixed on the side walls of the two sides of the power battery module, and each battery module heats the battery module at low temperature through the two heating assemblies PTC.
Four hanging rings 3 penetrate through four corners of the upper box body 2 of the power battery and are connected with the inside of the power battery system, and are used for transferring during battery transportation, assembly and disassembly.
Referring to fig. 5 and 6, the power battery module support assembly 9 is an important supporting structure of the whole system, and is also a carrier for connecting the components. The battery module in the power battery system is divided into two layers, and is respectively connected and fixed with the two-layer structure of the power battery module bracket assembly 9;
the power battery module support assembly 9 comprises a first support frame 901, a second support frame 902, a support column 903, a hoisting support column 904, an automatic fire extinguishing device support 905, a lower box connecting support 906, a first connecting cushion block 907, a second connecting cushion block 908 and a module support plate 909; the planes of the first support frame 901 and the second support frame 902 are parallel; the second connection pad 908 and the support column 903 are fixed by welding, and are welded and fixed with the first support frame 901 as a whole, so as to improve the overall connection strength; the second support frame 902 is located above the support post 903, and the second support frame 902 and the support post 903 are connected and fixed by a bolt through a first connection pad 907, so that the assembly operability of the upper battery module is facilitated.
The lower end of the lifting support column 904 is welded on the first connecting cushion block 907, and the upper end is in threaded connection with the lifting ring 3; the automatic fire extinguishing device support 905 is fixed on the second supporting frame 902 through bolts, the main function of the lifting support 904 is to accept the upper layer of module and the lower layer of module and transfer the modules to the lifting ring 3 for transferring the power battery system in the links of assembly, transportation and the like, and meanwhile, the lifting support 904 is fixed with the lower box connecting support 906 through bolts, so that the fixing point of the lower box of the battery is increased, the rigidity of the lower box of the battery is improved, and deformation is avoided.
The fire extinguishing apparatus 11 is fixed to a fire extinguishing apparatus holder 905.
The power battery lower box body 1 is fixedly connected with the first supporting frame 901 through welding, meanwhile, the power battery lower box body 1 is fixedly connected with the lower box body connecting support 906 through welding, the lower box body connecting support 906 is fixedly connected with the lifting support 904 through bolts, and the power battery upper box body 2 is fixedly connected with the upper box body through bolts, so that the integral structure of the power battery system is formed.
The first support frame 901 and the second support frame 902 are respectively provided with a module support plate; the power battery module 7 is fixed on the module support plate.
The adhesive with the equal thickness of 2mm is smeared between the bottom of the power battery module 7 and the module support plate, and better connection strength is kept between the power battery module, the module support plate and the support frame after the adhesive is solidified, so that the overall vibration resistance of the battery assembly is improved, and the battery cell and the module are effectively protected from being displaced in the up-down direction. The module support plate and the support frame are connected in a welding mode.
Referring to fig. 1 and 3, the high-voltage power battery high-voltage master control box 5 is used as an external output interface of the whole power battery system for connection of a whole vehicle, a charging pile and the like.
And the contact surface of the upper power battery box body 2 and the high-voltage total power battery control box 5 is coated with sealant.
The power battery upper box body 2 and the power battery high-voltage main control box 5 are provided with holes for connecting wire harnesses.
The power battery high-voltage main control box 5 is internally provided with a battery pack, a power conversion module, namely DC/DC, a battery pack management module BMU and 10 high-voltage branches; the low-voltage sampling circuit of the power battery module 7 is connected with the battery pack management module BMU; the battery pack management module BMU supplies power by converting the high voltage of the power battery system into 12V or 24V through a power conversion module, namely DC/DC; the positive high-voltage interface of the battery pack is connected to the positive high-voltage interface of the high-voltage main control box 5 through a wire harness, and the negative high-voltage interface of the battery pack is connected to the negative high-voltage interface of the high-voltage main control box 5 through a wire harness; the positive electrode of the battery core in the battery pack is output to a battery positive electrode high-voltage interface, and the negative electrode is output to a battery negative electrode high-voltage interface; the positive electrode and the negative electrode of the heating component PTC8 inside the battery pack are respectively connected to the battery PTC high-voltage interface and connected to the PTC high-voltage interface of the high-voltage master control box 5 through a wire harness.
The high-voltage branches are respectively branches 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 in the high-voltage master control box; the branch 1 in the high-voltage main control box is a main positive circuit, the main positive circuit is connected with a 630A high-voltage fuse and a 350A main positive relay in series, and meanwhile, a 20A pre-charge relay and a 30Ω pre-charge resistor are connected in parallel on the branch to form a pre-charge circuit, and finally, the pre-charge circuit is connected to a power supply positive electrode output 501 connector; the branch circuit 2 in the high-voltage master control box is a first fast charging positive pole loop, the first fast charging positive pole loop is connected with a 630A high-voltage fuse and a 250A fast charging relay 1 in series, and finally is connected to a first fast charging positive pole 503 output connector; the branch circuit 3 in the high-voltage main control box is a second fast-charging positive pole loop; the second fast charge positive pole loop is connected with the 630A high voltage fuse and the 250A fast charge relay 2 in series, and finally is connected to the second fast charge positive pole 505 output connector; the branch circuit 4 in the high-voltage master control box is a main negative circuit, and the main negative circuit is connected with a 350A main negative relay in series and finally connected to a power supply negative electrode output 502 connector; the branch circuit 5 in the high-voltage master control box is a first fast charge negative electrode loop, and the first fast charge negative electrode loop is connected with the 250A fast negative relay 1 in series and finally connected to a first fast charge negative electrode 504 connector; the branch circuit 6 in the high-voltage master control box is a second fast charge negative electrode loop, and the second fast charge negative electrode loop is connected with the 250A fast negative relay 2 in series and finally connected to a second fast charge negative electrode 506 connector; the branch circuit 7 in the high-voltage master control box is a first high-voltage starting circuit loop, the first high-voltage starting circuit loop is connected with a 630A high-voltage fuse and a 20A high-voltage fuse in series, and finally is connected to one end of a connector of the high-voltage starting switch 507; the branch circuit 8 in the high-voltage main control box is a second high-voltage starting circuit loop, and the second high-voltage starting circuit loop is connected with a power conversion module, namely DC/DC in series and finally connected to the other end of the connector of the high-voltage starting switch 507; the branch 9 in the high-voltage total control box is a heating component PTC positive pole loop, and the heating component PTC positive pole loop is connected with a 100A high-voltage fuse and a 50A PTC relay 1 in series, and is connected with a 100A high-voltage fuse and a 50A PTC relay 2 in parallel; the branch circuit 10 in the high-voltage master control box is a heating component, namely a PTC negative electrode loop, and the heating component, namely the PTC negative electrode loop, is directly connected with the main negative loop in parallel.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The power lithium battery system is characterized by comprising a box body, a power battery module (7), a heating component PTC (8), a power battery module bracket assembly (9), a high-voltage copper bar (10) and an automatic fire extinguishing device (11), wherein the power battery module (7), the heating component PTC (8) and the power battery module bracket assembly are arranged in the box body; the box body comprises a lower power battery box body (1), an upper power battery box body (2), a lifting ring (3) and a high-voltage total power battery control box (5); the power battery module support assembly (9) is fixed in the power battery lower box body (1); the power battery upper box body (2) is fixed on the power battery lower box body (1) through a first bolt (4); the power battery high-voltage main control box (5) is fixed on the power battery upper box body (2) through a second bolt (6); four lifting rings (3) penetrate through four corners of the upper box body (2) of the power battery and are fixed on the power battery module support assembly (9); the power battery module (7) and the automatic fire extinguishing device (11) are both fixed on the power battery module bracket assembly (9); the high-voltage copper bar (10) is connected with an electrode of the power battery module (7); the heating components PTC (8) are fixed on the side walls of the two sides of the power battery module (7);
the power battery module support assembly (9) comprises a first support frame (901), a second support frame (902), a support column (903), a hoisting support column (904), an automatic fire extinguishing device support (905), a lower box body connecting support (906), a first connecting cushion block (907), a second connecting cushion block (908) and a module support plate (909); the planes of the first support frame (901) and the second support frame (902) are parallel; the second connecting cushion block (908) and the supporting column (903) are welded into a whole and then welded on the first supporting frame (901); the first connecting cushion block (907) is fixed on the support column (903) and the second support frame (902) through bolts; the lower end of the lifting support column (904) is welded on the first connecting cushion block (907), and the upper end of the lifting support column is in threaded connection with the lifting ring (3); the automatic fire extinguishing device bracket (905) is fixed on the second supporting frame (902) through bolts; the automatic fire extinguishing device (11) is fixed on a bracket (905) of the automatic fire extinguishing device; a lower box body connecting bracket (906) is fixed on the lifting support column (904); the power battery module support assembly (9) is welded with the power battery lower box body (1) through a lower box body connecting support (906);
the power battery module (7) is formed by connecting battery cells in series and parallel; the power battery modules (7) are connected in series and parallel through high-voltage copper bars (10) to externally output a battery positive high-voltage interface and a battery negative high-voltage interface, and are input into a battery high-voltage master control box (5);
the front side of the power battery high-voltage main control box (5) is sequentially provided with a power supply positive electrode output (501) and a power supply negative electrode output (502), the rear side of the power battery high-voltage main control box is sequentially provided with a first quick charge positive electrode (503), a first quick charge negative electrode (504), a second quick charge positive electrode (505), a second quick charge negative electrode (506) and a high-voltage starting switch (507), and the right side of the power battery high-voltage main control box is provided with a low-voltage port (508);
the power battery high-voltage main control box (5) is internally provided with a battery pack, a power conversion module (DC/DC), a battery pack management module BMU and 10 high-voltage branches; the low-voltage sampling circuit of the power battery module (7) is connected with the battery pack management module BMU; the battery pack management module BMU supplies power by converting the high voltage of the power battery system into 12V or 24V through a power conversion module, namely DC/DC; the positive high-voltage interface of the battery pack is connected to the positive high-voltage interface of the high-voltage main control box (5) through a wire harness, and the negative high-voltage interface of the battery pack is connected to the negative high-voltage interface of the high-voltage main control box (5) through a wire harness; the positive electrode of the battery core in the battery pack is output to a battery positive electrode high-voltage interface, and the negative electrode is output to a battery negative electrode high-voltage interface; the positive electrode and the negative electrode of the heating component PTC (8) in the battery pack are respectively connected to the battery PTC high-voltage interface and connected to the PTC high-voltage interface of the high-voltage master control box (5) through a wire harness;
the high-voltage branches are respectively branches 1, 2, 3, 4, 5, 6, 7, 8, 9 and 10 in the high-voltage master control box; the branch circuit 1 in the high-voltage main control box is a main positive circuit, the main positive circuit is connected with a 630A high-voltage fuse and a 350A main positive relay in series, meanwhile, a 20A pre-charge relay and a 30Ω pre-charge resistor are connected in parallel on the branch circuit to form a pre-charge circuit, and finally, the pre-charge circuit is connected to a power supply positive electrode output (501) connector; the branch circuit 2 in the high-voltage master control box is a first fast charging positive pole loop, the first fast charging positive pole loop is connected with a 630A high-voltage fuse and a 250A fast charging relay 1 in series, and finally is connected to a first fast charging positive pole (503) output connector; the branch circuit 3 in the high-voltage main control box is a second fast-charging positive pole loop; the second fast charge positive pole loop is connected with a 630A high voltage fuse and a 250A fast charge relay 2 in series and finally connected to a second fast charge positive pole (505) output connector; the branch circuit 4 in the high-voltage master control box is a main negative circuit, and the main negative circuit is connected with a 350A main negative relay in series and finally connected to a power supply negative electrode output (502) connector; the branch circuit 5 in the high-voltage master control box is a first fast charge negative electrode loop, the first fast charge negative electrode loop is connected with the 250A fast negative relay 1 in series, and finally the first fast charge negative electrode loop is connected to a first fast charge negative electrode (504) connector; the branch circuit 6 in the high-voltage master control box is a second fast charge negative electrode loop, the second fast charge negative electrode loop is connected with the 250A fast negative relay 2 in series and finally connected to a second fast charge negative electrode (506) connector; the branch circuit 7 in the high-voltage master control box is a first high-voltage starting circuit loop, the first high-voltage starting circuit loop is connected with a 630A high-voltage fuse and a 20A high-voltage fuse in series, and finally is connected to one end of a connector of a high-voltage starting switch (507); the branch circuit 8 in the high-voltage main control box is a second high-voltage starting circuit loop, and the second high-voltage starting circuit loop is connected with a power conversion module, namely DC/DC in series and finally connected to the other end of the connector of the high-voltage starting switch (507); the branch 9 in the high-voltage total control box is a heating component PTC positive pole loop, and the heating component PTC positive pole loop is connected with a 100A high-voltage fuse and a 50A PTC relay 1 in series, and is connected with a 100A high-voltage fuse and a 50A PTC relay 2 in parallel; the branch circuit 10 in the high-voltage master control box is a heating component, namely a PTC negative electrode loop, and the heating component, namely the PTC negative electrode loop, is directly connected with the main negative loop in parallel.
2. The power lithium battery system according to claim 1, wherein the first support frame (901) and the second support frame (902) are provided with module support plates; the power battery module (7) is fixed on the module support plate.
3. The power lithium battery system according to claim 1, wherein an adhesive with an equal thickness of 2mm is applied between the bottom of the power battery module (7) and the module support plate.
4. The power lithium battery system according to claim 1, wherein the contact surface of the upper power battery box (2) and the high-voltage main power battery control box (5) is coated with sealant.
5. The power lithium battery system according to claim 1, wherein the power battery upper box body (2) and the power battery high-voltage main control box (5) are provided with holes for connecting wire harnesses.
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| CN114759276A (en) * | 2022-02-23 | 2022-07-15 | 中国第一汽车股份有限公司 | Power battery system, electric vehicle and design method |
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