CN111923750A - Power lithium battery system - Google Patents
Power lithium battery system Download PDFInfo
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- CN111923750A CN111923750A CN202010742235.3A CN202010742235A CN111923750A CN 111923750 A CN111923750 A CN 111923750A CN 202010742235 A CN202010742235 A CN 202010742235A CN 111923750 A CN111923750 A CN 111923750A
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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 discloses a power lithium battery system. The power battery pack comprises a box body, and 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 which are arranged in the box body; the box body comprises a power battery lower box body, a power battery upper box body, a lifting ring and a power battery high-voltage master control box; the power battery module bracket assembly is fixed in the lower box body of the power battery; the upper box body of the power battery is fixed on the lower box body of the power battery 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 lifting 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 heating assembly PTC is fixed on the side walls of two sides of the power battery module. The invention can improve the space utilization rate of the whole vehicle, improve the electric quantity of the battery pack 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
At present, the motorization of the automobile industry is a necessary trend, and different types of automobiles are developed to the motorization, including passenger cars, commercial vehicles (trucks and passenger cars), special vehicles (engineering vehicles and special purpose vehicles), low-speed mobility vehicles and the like.
Most of electric special vehicles are applied to commercial scenes, the whole vehicle is subjected to environmental protection requirements, functional and performance requirements and the like, considerable economic benefits can be brought compared with other vehicles, and meanwhile, the sensitivity of the electric special vehicles to battery cost is slightly low, so that the power battery in the field is popular at present.
The general special vehicle power lithium battery system mainly comprises components such as a battery core, a module, a structural component, a heating component, a copper bar, a wire harness, a battery management unit BMU, a distribution box, a charging interface and a discharging interface, the voltage of the general power battery can be realized by combining the power battery in series and parallel according to the requirement of the whole vehicle, and the low-voltage component generally needs to be externally connected into 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 a finished automobile, improve the electric quantity of a battery pack, increase the driving range of the finished automobile, is internally provided with DC/DC, and can convert the total voltage after series-parallel connection of power lithium batteries into 12V or 24V output to further supply power to a battery BMU (battery management unit) and the like, save the cost and space of an external lead-acid storage battery, and solve the defects of the conventional power lithium battery system.
The technical scheme of the invention is described as follows by combining the attached drawings:
a power lithium battery system comprises a box body, and 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 which 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 lifting ring 3 and a power battery high-voltage master 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 master 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 power battery upper box body 2 and are fixed on a 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 assembly PTC8 is fixed on the two side walls 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 support column 903 are welded 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 hoisting strut 904 is welded on the first connecting pad 907, and the upper end is in threaded connection with the hoisting 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 the automatic fire extinguishing device bracket 905; a lower box body connecting bracket 906 is fixed on the hoisting strut 904; and 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 first support frame 901 and the second support frame 902 are both provided with module support plates; the power battery module 7 is fixed on the module support plate.
And an adhesive with the same thickness of 2mm is coated between the bottom of the power battery module 7 and the module supporting plate.
The power battery module 7 is formed by connecting battery electric cores in series and in parallel; and the power battery modules 7 are connected in series and parallel through the high-voltage copper bar 10 to output a battery anode high-voltage interface and a battery cathode high-voltage interface to the outside, and input the high-voltage interfaces into the battery high-voltage master control box 5.
The front side of the power battery high-voltage master 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.
A battery pack, a power supply conversion module (DC/DC), a battery pack management module BMU and 10 high-voltage branches are arranged in the power battery high-voltage master control box 5; the low-voltage sampling circuit of the power battery module 7 is connected with the BMU; the BMU is powered by a power supply conversion module, namely DC/DC, to convert the high voltage of the power battery system into 12V or 24V; the positive electrode high-voltage interface of the battery pack is connected to the positive electrode high-voltage interface of the high-voltage master control box 5 through a wire harness, and the negative electrode high-voltage interface of the battery pack is connected to the negative electrode high-voltage interface of the high-voltage master control box 5 through the wire harness; the positive electrode of the battery cell in the battery pack is output to the battery positive electrode high-voltage interface, and the negative electrode of the battery cell is output to the battery negative electrode high-voltage interface; the positive pole and the negative pole of the heating assembly PTC8 in the battery pack are respectively connected to the battery PTC high-voltage interface and are connected to the PTC high-voltage interface of the high-voltage master control box 5 through a wiring 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; a branch circuit 1 in the high-voltage master 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-charging relay and a 30 omega pre-charging resistor are connected to the branch circuit in parallel to form a pre-charging circuit and finally connected to a power supply positive electrode output 501 connector; the inner branch 2 of the high-voltage master control box is a first quick-charging positive pole loop, and the first quick-charging positive pole loop is connected with a 630A high-voltage fuse and a 250A quick-charging relay 1 in series and is finally connected to an output connector of a first quick-charging positive pole 503; the inner branch 3 of the high-voltage master control box is a second quick-charging positive pole loop; the second quick-charging positive pole loop is connected with a 630A high-voltage fuse and a 250A quick-charging relay 2 in series and is finally connected to a second quick-charging positive pole 505 output connector; the inner branch 4 of 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 is finally connected to a power supply negative electrode output 502 connector; the inner branch 5 of the high-voltage master control box is a first fast-charging negative pole loop, the first fast-charging negative pole loop is connected with a 250A fast negative relay 1 in series and is finally connected to a first fast-charging negative pole 504 connector; the inner branch 6 of the high-voltage master control box is a second fast-charging negative pole loop, the second fast-charging negative pole loop is connected with a 250A fast negative relay 2 in series, and finally, the second fast-charging negative pole loop is connected to a second fast-charging negative pole 506 connector; the inner branch 7 of the high-voltage master control box is a first high-voltage starting circuit loop which is connected with a 630A high-voltage fuse and a 20A high-voltage fuse in series and is finally connected to one end of a connector of a high-voltage starting switch 507; the inner branch 8 of the high-voltage master control box is a second high-voltage starting circuit loop which is connected with a power conversion module, namely DC/DC in series and is finally connected to the other end of the connector of the high-voltage starting switch 507; the high-voltage master control box inner branch 9 is a heating assembly PTC positive pole loop, the heating assembly PTC positive pole loop is connected with a 100A high-voltage fuse and a 50A PTC relay 1 in series, and is simultaneously connected with the 100A high-voltage fuse and the 50A PTC relay 2 in parallel; the inner branch 10 of the high-voltage master control box is a heating assembly, namely a PTC (positive temperature coefficient) negative pole loop, and the heating assembly, namely the PTC negative pole loop is directly connected with the main negative pole loop in parallel.
And a sealant is coated on the contact surface of the power battery upper box body 2 and the power battery high-voltage master control box 5.
And holes for connecting the wiring harnesses are formed in the power battery upper box body 2 and the power battery high-voltage master control box 5.
The invention has the beneficial effects that:
1) the built-in DC/DC can be converted into 12V or 24V output through the total voltage of the series-parallel connection of the power lithium batteries, so that power is supplied to the BMU (battery management unit) and the like, and the cost and the space of an external lead-acid storage battery are saved;
2) according to the invention, the manual high-voltage starting switch is added, so that the power failure of the power battery system can be manually controlled, and the power battery feed caused after a special vehicle is parked for a long time is avoided;
3) the BMU and the DC/DC are positioned in the high-voltage master control box, so that later-stage disassembly, maintenance and replacement are facilitated, and the working hours are reduced;
4) the invention meets the special requirements of large capacity, quick charging and the like of the special vehicle, and provides the working principle of the double-loop quick charging battery system, each quick charging loop can charge the battery pack independently, and two quick charging loops can charge the battery pack simultaneously, so that the battery charging time can be greatly shortened, 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 electric quantity of a battery pack, increases the driving range of the whole vehicle and improves the economic benefit of a special vehicle;
6) the battery module has ultra-large capacity and high weight, and a double fixing scheme that the bottom of the module and a battery box body are fixed by an adhesive and the battery module and the battery box body are connected by a bolt is provided, so that the structural stability and the vibration resistance of the power battery system are improved, and the safety of the battery system is further improved;
7) the invention adopts a frame type bearing scheme consisting of two layers of supporting frames, supporting columns and hoisting columns, compared with the common battery structure which directly bears the load by using the lower box body, the invention can bear larger weight and reduce 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 in the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the contents of the embodiments of the present invention and the drawings without creative efforts.
FIG. 1 is a schematic diagram of a power battery 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 a power battery system;
FIG. 5 is a schematic view of a power battery module support assembly;
fig. 6 is a schematic view of a power battery module bracket assembly.
In the figure: 1. a lower box body of the power battery; 2. the power battery is arranged on the box body; 3. a hoisting 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 element PTC; 9. a power battery module support assembly; 10. high-voltage copper bars; 11. an automatic fire extinguishing device; 501. outputting the positive electrode of the power supply; 502. outputting the negative electrode of the power supply; 503. a first fast positive charge electrode; 504. a first fast-charging cathode; 505. a second fast positive charge electrode; 506. a second fast-charging cathode; 507. a high voltage starting switch; 508. a low-voltage interface; 901. a first support frame; 902. a second support frame; 903. a support pillar; 904. hoisting the support; 905. a self-extinguishing device holder; 906. the lower box body is connected with the bracket; 907. a first connecting cushion block; 908. a second connecting cushion block; 909. the module backup pad.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Referring to fig. 2 and 4, the power lithium battery system comprises a box body, and a power battery module 7, a heating assembly PTC8, a power battery module support assembly 9, a high-voltage copper bar 10 and an automatic fire extinguishing device 11 which 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 lifting ring 3 and a power battery high-voltage master 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 master 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 components PTC8 are fixed on the side walls of two sides of the power battery module, and each battery module is used for heating the battery module at low temperature through two heating components PTC.
Rings 3 have four, pass four angles and the power battery system internal connection of power battery upper box 2 for transportation when battery transportation, assembly, dismantlement.
Referring to fig. 5 and 6, the power battery module support assembly 9 is a key supporting structural member of the whole system and is also a carrier for connecting all 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 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 support column 903 are fixed in a welding mode, and the second connecting cushion block and the support column 903 are integrally welded and fixed with the first support frame 901 to improve the overall connecting strength; the second support frame 902 is located on the support column 903, and the second support frame 902 and the support column 903 are connected and fixed by bolts through the first connecting cushion block 907, so that the assembly operability of the upper battery module is facilitated.
The lower end of the hoisting strut 904 is welded on the first connecting pad 907, and the upper end is in threaded connection with the hoisting ring 3; the automatic fire extinguishing device support 905 passes through the bolt fastening on second braced frame 902, and two-layer module about two-layer about the main effect of hoist and mount pillar 904 is accepted to transmit to rings 3 for power battery system is in the transportation of links such as assembly, transportation, and hoist and mount pillar 904 passes through the bolt fastening with lower box linking bridge 906 simultaneously, increases the fixed point of box under the battery, improves the rigidity of box under the battery, avoids warping.
The automatic fire extinguishing device 11 is fixed on the automatic fire extinguishing device support 905.
The lower power battery box body 1 is fixedly connected with the first supporting frame 901 through welding, meanwhile, the lower power battery box body 1 is fixedly welded with the lower box body connecting support 906, the lower box body connecting support 906 is fixedly connected with the hoisting support 904 through a bolt, and the upper power battery box body 2 is fixedly connected with the upper box body through a bolt, so that the integral structure of the power battery system is formed.
The first support frame 901 and the second support frame 902 are both provided with module support plates; the power battery module 7 is fixed on the module support plate.
Scribble between 7 bottoms of power battery module and the module backup pad and scribble the binder that the uniform thickness is 2mm, the binder solidifies the back and makes and keep better joint strength between power battery module and module backup pad and the braced frame, improves battery assembly's whole resistant vibration nature, has effectively protected electric core and module to take place the displacement in upper and lower direction. The module supporting plate and the supporting frame are connected in a welding mode.
Referring to fig. 1 and fig. 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 connecting a whole vehicle, a charging pile and the like.
And a sealant is coated on the contact surface of the power battery upper box body 2 and the power battery high-voltage master control box 5.
And holes for connecting the wiring harnesses are formed in the power battery upper box body 2 and the power battery high-voltage master control box 5.
A battery pack, a power supply conversion module (DC/DC), a battery pack management module BMU and 10 high-voltage branches are arranged in the power battery high-voltage master control box 5; the low-voltage sampling circuit of the power battery module 7 is connected with the BMU; the BMU is powered by a power supply conversion module, namely DC/DC, to convert the high voltage of the power battery system into 12V or 24V; the positive electrode high-voltage interface of the battery pack is connected to the positive electrode high-voltage interface of the high-voltage master control box 5 through a wire harness, and the negative electrode high-voltage interface of the battery pack is connected to the negative electrode high-voltage interface of the high-voltage master control box 5 through the wire harness; the positive electrode of the battery cell in the battery pack is output to the battery positive electrode high-voltage interface, and the negative electrode of the battery cell is output to the battery negative electrode high-voltage interface; the positive pole and the negative pole of the heating assembly PTC8 in the battery pack are respectively connected to the battery PTC high-voltage interface and are connected to the PTC high-voltage interface of the high-voltage master control box 5 through a wiring 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; a branch circuit 1 in the high-voltage master 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-charging relay and a 30 omega pre-charging resistor are connected to the branch circuit in parallel to form a pre-charging circuit and finally connected to a power supply positive electrode output 501 connector; the inner branch 2 of the high-voltage master control box is a first quick-charging positive pole loop, and the first quick-charging positive pole loop is connected with a 630A high-voltage fuse and a 250A quick-charging relay 1 in series and is finally connected to an output connector of a first quick-charging positive pole 503; the inner branch 3 of the high-voltage master control box is a second quick-charging positive pole loop; the second quick-charging positive pole loop is connected with a 630A high-voltage fuse and a 250A quick-charging relay 2 in series and is finally connected to a second quick-charging positive pole 505 output connector; the inner branch 4 of 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 is finally connected to a power supply negative electrode output 502 connector; the inner branch 5 of the high-voltage master control box is a first fast-charging negative pole loop, the first fast-charging negative pole loop is connected with a 250A fast negative relay 1 in series and is finally connected to a first fast-charging negative pole 504 connector; the inner branch 6 of the high-voltage master control box is a second fast-charging negative pole loop, the second fast-charging negative pole loop is connected with a 250A fast negative relay 2 in series, and finally, the second fast-charging negative pole loop is connected to a second fast-charging negative pole 506 connector; the inner branch 7 of the high-voltage master control box is a first high-voltage starting circuit loop which is connected with a 630A high-voltage fuse and a 20A high-voltage fuse in series and is finally connected to one end of a connector of a high-voltage starting switch 507; the inner branch 8 of the high-voltage master control box is a second high-voltage starting circuit loop which is connected with a power conversion module, namely DC/DC in series and is finally connected to the other end of the connector of the high-voltage starting switch 507; the high-voltage master control box inner branch 9 is a heating assembly PTC positive pole loop, the heating assembly PTC positive pole loop is connected with a 100A high-voltage fuse and a 50A PTC relay 1 in series, and is simultaneously connected with the 100A high-voltage fuse and the 50A PTC relay 2 in parallel; the inner branch 10 of the high-voltage master control box is a heating assembly, namely a PTC (positive temperature coefficient) negative pole loop, and the heating assembly, namely the PTC negative pole loop is directly connected with the main negative pole loop in parallel.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
It is noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A power lithium battery system is characterized by comprising a box body, and 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) which 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 lifting ring (3) and a power battery high-voltage master 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 master 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 power battery upper box body (2) and are fixed on a power battery module bracket 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); and the heating component PTC (8) is fixed on the side walls of two sides of the power battery module (7).
2. The power lithium battery system of claim 1, wherein 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), a self-extinguishing device support (905), a lower box connecting support (906), a first connecting block (907), a second connecting block (908) and a module support plate (909); the planes of the first supporting frame (901) and the second supporting frame (902) are parallel; the second connecting cushion block (908) and the support column (903) are welded into a whole and then welded on the first support frame (901); the first connecting cushion block (907) is fixed on the supporting column (903) and the second supporting frame (902) through bolts; the lower end of the hoisting support column (904) is welded on the first connecting cushion block (907), and the upper end of the hoisting support column is in threaded connection with the hoisting 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 the automatic fire extinguishing device bracket (905); a lower box body connecting bracket (906) is fixed on the hoisting support column (904); and the power battery module bracket assembly (9) is welded with the power battery lower box body (1) through a lower box body connecting bracket (906).
3. The power lithium battery system according to claim 1, wherein each of the first support frame (901) and the second support frame (902) is provided with a module support plate; and the power battery module (7) is fixed on the module supporting plate.
4. The lithium power battery system according to claim 3, characterized in that an adhesive with an equal thickness of 2mm is applied between the bottom of the power battery module (7) and the module support plate.
5. The lithium power battery system according to claim 1, characterized in that the power battery module (7) is composed of battery cells connected in series and in parallel; and the power battery modules (7) are connected in series and parallel through the high-voltage copper bar (10) to output a battery anode high-voltage interface and a battery cathode high-voltage interface to the outside, and input the high-voltage interfaces into the battery high-voltage master control box (5).
6. The power lithium battery system according to claim 1, wherein a power supply positive electrode output (501) and a power supply negative electrode output (502) are sequentially arranged on the front side of the power battery high-voltage master control box (5), 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) are sequentially arranged on the rear side, and a low-voltage interface (508) is arranged on the right side.
7. The power lithium battery system according to claim 6, wherein a battery pack, a power conversion module (DC/DC), a battery pack management module (BMU) and 10 high-voltage branches are arranged in the power battery high-voltage master control box (5); the low-voltage sampling circuit of the power battery module (7) is connected with the BMU; the BMU is powered by a power supply conversion module, namely DC/DC, to convert the high voltage of the power battery system into 12V or 24V; the positive electrode high-voltage interface of the battery pack is connected to the positive electrode high-voltage interface of the high-voltage master control box (5) through a wire harness, and the negative electrode high-voltage interface of the battery pack is connected to the negative electrode high-voltage interface of the high-voltage master control box (5) through the wire harness; the positive electrode of the battery cell in the battery pack is output to the battery positive electrode high-voltage interface, and the negative electrode of the battery cell is output to the battery negative electrode high-voltage interface; and the positive electrode and the negative electrode of the heating assembly PTC (8) in the battery pack are respectively connected to the battery PTC high-voltage interface and are connected to the PTC high-voltage interface of the high-voltage master control box (5) through a wiring harness.
8. The power lithium battery system of claim 1, wherein the high voltage branches are respectively high voltage main control box internal branches 1, 2, 3, 4, 5, 6, 7, 8, 9, 10; a branch circuit 1 in the high-voltage master 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-charging relay and a 30 omega pre-charging resistor are connected to the branch circuit in parallel to form a pre-charging circuit and finally connected to a power supply positive electrode output (501) connector; the high-voltage main control box inner branch 2 is a first quick-charging positive pole loop, the first quick-charging positive pole loop is connected with a 630A high-voltage fuse and a 250A quick-charging relay 1 in series and is finally connected to a first quick-charging positive pole (503) output connector; the inner branch 3 of the high-voltage master control box is a second quick-charging positive pole loop; the second quick-charging positive pole loop is connected with a 630A high-voltage fuse and a 250A quick-charging relay 2 in series and is finally connected to a second quick-charging positive pole (505) output connector; the inner branch 4 of 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 is finally connected to a power supply negative output (502) connector; the high-voltage master control box inner branch 5 is a first fast charge negative pole loop, the first fast charge negative pole loop is connected with a 250A fast negative relay 1 in series, and finally, the first fast charge negative pole loop is connected to a first fast charge negative pole (504) connector; the inner branch 6 of the high-voltage master control box is a second fast-charging negative pole loop, the second fast-charging negative pole loop is connected with a 250A fast negative relay 2 in series, and finally, the second fast-charging negative pole loop is connected to a second fast-charging negative pole (506) connector; the high-voltage master control box inner branch 7 is a first high-voltage starting circuit loop, and the first high-voltage starting circuit loop is connected with a 630A high-voltage fuse and a 20A high-voltage fuse in series and is finally connected to one end of a high-voltage starting switch (507) connector; the inner branch 8 of the high-voltage master control box is a second high-voltage starting circuit loop which is connected with a power conversion module (namely DC/DC) in series and is finally connected to the other end of the connector of the high-voltage starting switch (507); the high-voltage master control box inner branch 9 is a heating assembly PTC positive pole loop, the heating assembly PTC positive pole loop is connected with a 100A high-voltage fuse and a 50A PTC relay 1 in series, and is simultaneously connected with the 100A high-voltage fuse and the 50A PTC relay 2 in parallel; the inner branch 10 of the high-voltage master control box is a heating assembly, namely a PTC (positive temperature coefficient) negative pole loop, and the heating assembly, namely the PTC negative pole loop is directly connected with the main negative pole loop in parallel.
9. The power lithium battery system according to claim 1, wherein a sealant is coated on the contact surface between the power battery upper box body (2) and the power battery high-voltage master control box (5).
10. The power lithium battery system according to claim 1, wherein the power battery upper box body (2) and the power battery high-voltage master control box (5) are provided with holes for connecting a wiring harness.
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| CN114865191A (en) * | 2022-05-26 | 2022-08-05 | 东风时代(武汉)电池系统有限公司 | Double-layer module battery system and vehicle |
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