CN113488734A - Power battery pack system assembly - Google Patents
Power battery pack system assembly Download PDFInfo
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- CN113488734A CN113488734A CN202110627300.2A CN202110627300A CN113488734A CN 113488734 A CN113488734 A CN 113488734A CN 202110627300 A CN202110627300 A CN 202110627300A CN 113488734 A CN113488734 A CN 113488734A
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/204—Racks, modules or packs for multiple batteries or multiple cells
- H01M50/207—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape
- H01M50/209—Racks, modules or packs for multiple batteries or multiple cells characterised by their shape adapted for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/60—Heating or cooling; Temperature control
- H01M10/61—Types of temperature control
- H01M10/613—Cooling or keeping cold
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/62—Heating or cooling; Temperature control specially adapted for specific applications
- H01M10/625—Vehicles
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6551—Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6554—Rods or plates
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/655—Solid structures for heat exchange or heat conduction
- H01M10/6556—Solid parts with flow channel passages or pipes for heat exchange
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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
- H01M10/60—Heating or cooling; Temperature control
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/656—Means for temperature control structurally associated with the cells characterised by the type of heat-exchange fluid
- H01M10/6567—Liquids
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/244—Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/258—Modular batteries; Casings provided with means for assembling
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/271—Lids or covers for the racks or secondary casings
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/284—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders with incorporated circuit boards, e.g. printed circuit boards [PCB]
- H01M50/287—Fixing of circuit boards to lids or covers
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
- H01M50/289—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders characterised by spacing elements or positioning means within frames, racks or packs
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- 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
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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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- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
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- Aviation & Aerospace Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Secondary Cells (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a power battery pack system assembly which comprises a master control unit, a plurality of layers of module units, an assembly support and a liquid cooling system, wherein the plurality of layers of module units are sequentially arranged from top to bottom through the assembly support, the master control unit is arranged above the uppermost module unit, the bottom of each layer of module unit is connected to the liquid cooling system, and each layer of module unit is respectively connected to the master control unit through signals. According to the power battery pack system assembly, the module power supply and the electric system of the master control unit are connected through the high-voltage cable and the low-voltage wire harness, the cable and the wire harness are fixed to the box body and the support through the fixing support, the connection is firm, and the fixing is reliable; the novel structure of system assembly can be effectively promoted, it is firm to guarantee that each subassembly in the battery system connects fixedly, promotes battery system's mechanical properties, and every module has independent liquid cooling system and high-low voltage output unit, and the temperature is balanced controllable, and the electrical properties real time monitoring has guaranteed the quality stability of battery system module.
Description
Technical Field
The invention belongs to the technical field of battery systems in the new energy automobile industry, and particularly relates to a power battery pack system assembly.
Background
At present, lithium ion batteries are more and more widely used, and the lead-acid nickel-chromium batteries are gradually replaced by the lithium ion batteries with the advantages of small volume, light weight, environmental protection and reutilization in the field of electric vehicles. In order to meet market demands, the battery pack needs to meet the requirements of the product on safety and reliability, and meanwhile, the product needs to meet the electrical safety inside the battery pack, so that the service life of the battery pack is guaranteed. At present, the battery system assembly structure and the control unit are single, the fixing and assembly of the internal components of the system have certain limitations, especially when the product vibrates mechanically, the existing assembly structure can not effectively ensure the strength of the product, and the safety performance of the product is influenced, especially for a multi-module unit system assembly with higher voltage and capacity.
Disclosure of Invention
In view of this, the present invention is directed to a power battery pack system assembly to solve the problems of low structural strength, low safety performance, and unstable voltage temperature control of the existing product.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the utility model provides a power battery wraps system assembly, includes total control unit, a plurality of layers of module unit, assembly support and liquid cooling system, and a plurality of layers of module unit set gradually through assembly support top-down, and the unit is always controlled in the top installation of the module unit of the top, and the bottom of every layer of module unit all is connected to the liquid cooling system, and every layer of module unit is signal connection to total control unit respectively.
Further, the module unit is 3, is the first layer module unit, second floor module unit and the first layer module unit that set gradually from bottom to top respectively, and the equal rigid coupling in both sides of every layer of module unit is to assembly support, and the top of third layer module unit is equipped with total accuse unit.
Furthermore, the total control unit comprises a total control box body, and a BDU and a BMS are installed in the total control box body.
Furthermore, the third layer of module unit comprises a box upper cover, a box lower cover, a battery module, a heat conduction pad, a low-voltage plug-in end, a module sampling joint and a high-voltage plug-in end, wherein the box lower cover is arranged below the box upper cover, a BMU, a high-voltage relay and a low-voltage plug-in are arranged on one side of the box lower cover, and the box lower cover is respectively provided with the high-voltage plug-in end and the low-voltage plug-in end; a plurality of battery module of mid-mounting in the box inferior valve, be equipped with the heat conduction pad between battery module and the box inferior valve bottom, one side of every battery module all is equipped with the module sampling and connects, every module sampling connects respectively through the sampling pencil be connected to BMU's mainboard on, BMU is connected to the BMS of total accuse unit through low pressure communication pencil, high-pressure relay is connected to the BMS of total accuse unit through high pressure connection pencil.
Furthermore, the high-voltage plug-in end comprises a positive plug-in end and a negative plug-in end, the positive plug-in end is arranged on one side of the lower case of the case body, and the negative plug-in end is arranged on the other side of the lower case of the case body.
Furthermore, every the integrated liquid cooling pipe of mode that all adopts die-casting of box inferior valve bottom, the liquid cooling system includes inlet tube and outlet pipe, the inlet tube communicates with the water inlet of every liquid cooling pipe, the outlet pipe communicates with the delivery port of every liquid cooling pipe.
Further, the assembly support comprises a main control fixing part, module fixing parts and a hoisting part, the hoisting part is arranged at the top of the assembly support, the main control fixing part is arranged in the middle of the assembly support, the module fixing parts are uniformly distributed below the assembly support, and the number of the module fixing parts is the same as that of the module units;
furthermore, the cross section of the assembly bracket is of a right-angled triangle structure, and the angle of the large acute angle A in the triangle is not less than 80 degrees.
Further, the total control fixing frame is a rectangular shell structure with an opening on one side, a flanging is arranged on one side of the total control fixing frame, a connecting portion is arranged on the other side of the total control fixing frame, the connecting portion is connected to the total control fixing portion through a bolt, and the flanging is fixedly connected to one side of the total control box body.
Compared with the prior art, the power battery pack system assembly provided by the invention has the following advantages:
(1) according to the power battery pack system assembly, the module power supply and the electric system of the master control unit are connected through the high-voltage cable and the low-voltage wire harness, the cable and the wire harness are fixed to the box body and the support through the fixing support, the connection is firm, and the fixing is reliable; the novel structure of system assembly can be effectively improved, the connection and fixation of all components in the battery system are firm, and the mechanical performance of the battery system is improved.
(2) The power battery pack system assembly can monitor the temperature and the voltage of each module at the same time, balance the temperature of each module unit cell by using the liquid cooling system, monitor the voltage of each module unit by using the BMS management system, and control the on-off of the whole battery system circuit by using the BDU management system, thereby improving the stability of product quality.
(3) The power battery pack system assembly is characterized in that a battery module and a master control unit module are independently arranged on the whole battery pack assembly, the whole battery pack assembly is composed of three battery module units and a master control unit, each module unit is independently controlled through a BMU system, and information such as temperature and voltage of a battery cell in the battery module is independently monitored; each module is provided with an independent liquid cooling system and a high-low voltage output unit, the temperature is balanced and controllable, the electrical performance is monitored in real time, and the quality stability of the battery system module is ensured.
(4) According to the power battery pack system assembly, the liquid cooling systems of the battery pack assemblies in the system are distributed into the module units, the bottom of the system adopts a die-casting mode, the liquid cooling pipe assemblies are integrated, the weight of a box body is reduced, the space occupied by the traditional liquid cooling plate is reduced, and the energy density is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of a power battery pack system assembly according to an embodiment of the invention;
fig. 2 is a top view of a third layer module unit according to an embodiment of the invention;
FIG. 3 is a sectional view taken along line A-A of FIG. 2;
FIG. 4 is an enlarged view of portion A of FIG. 3;
FIG. 5 is a diagram illustrating a third level module unit according to an embodiment of the present invention;
FIG. 6 is a schematic view of a lower case of the case according to the embodiment of the present invention;
FIG. 7 is a front view of an assembly support according to an embodiment of the present invention;
FIG. 8 is a side view of an assembly support according to an embodiment of the present invention;
FIG. 9 is a schematic structural diagram of a master control fixing frame according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a liquid cooling system according to an embodiment of the invention;
fig. 11 is a schematic diagram of the high voltage electrical principle according to an embodiment of the present invention.
Description of reference numerals:
1-a master control unit; 2-a third layer module unit; 21-upper cover of the box body; 22-a lower case of the case body; 221-a partition plate; 222-an isolation chamber; 223-module mounting chamber; 23-a battery module; 24-a thermally conductive pad; 25-high voltage plug-in end; 26-low voltage plug-in end; 27-a modular sampling connector; 3-a second layer module unit; 4-a first layer module unit; 5-an assembly support; 51-a master control fixing part; 52-module fixing part; 53-hoisting part; 6-a liquid cooling system; 7-a master control fixing frame; 71-flanging; 72-connecting part.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
Interpretation of terms:
BMS Battery management System (BATTERY MANAGEMENT SYSTEM), electric vehicle BATTERY Management System (BMS) is the important tie of connecting on-vehicle power BATTERY and electric automobile, and its main function includes: monitoring physical parameters of the battery in real time; estimating the state of the battery; online diagnosis and early warning; charging, discharging and pre-charging control; balance management, thermal management, and the like. The BMS includes a plurality of processing modules: the system comprises a data acquisition module, an SOC estimation module, an electrical control module, a safety control module, a thermal management module, a data communication and display module and the like.
BMU (Battery MANAGEMENT Unit) BMU is a MANAGEMENT UNIT for managing a certain BATTERY in the BATTERY system, and the BMU monitors relevant parameters of the BATTERY UNIT, including voltage monitoring, current detection, temperature monitoring, insulation monitoring, relay state monitoring, SOC (state of charge), and the like.
BCU: and an electronic CONTROL UNIT (BATTERY CONTROL UNIT) for controlling or managing the BATTERY system or thermal performance and performing information interaction with other CONTROL UNITs on the vehicle.
The BDU, a Battery pack disconnection Unit (Battery disconnection Unit), is designed specifically for the interior of the Battery pack, and is also one of the high voltage distribution boxes.
The utility model provides a power battery wraps system assembly, as shown in fig. 1 to 11, including total control unit 1, a plurality of layers of module unit, assembly support 5, liquid cooling system 6 and total control mount 7, a plurality of layers of module unit set gradually through assembly support 5 top-down, the unit 1 is always controlled in the top installation of the module unit of the top, the bottom of every layer of module unit all is connected to liquid cooling system 6, every layer of module unit is connected to total control unit 1 respectively. The scheme designs an independent battery system assembly, and ensures the electrical control of the battery pack system assembly and the stability of fixing each module unit and the master control unit. The scheme solves the problems that the traditional battery module and the control unit are single, and the internal components of the system are fixed and assembled with certain limitations. For a multi-module unit system assembly with higher voltage and capacity, a new product is greatly improved in structural strength and voltage temperature control.
In one or more embodiments, the number of the module units is 3, and the module units are respectively a first layer module unit 4, a second layer module unit 3 and a first layer module unit 2 which are sequentially arranged from bottom to top, two sides of each layer of module unit are fixedly connected to an assembly bracket 5, and a master control unit 1 is arranged above the third layer module unit 2. The battery pack assembly is connected with the battery pack module unit and the master control unit 1 through the battery pack assembly bracket 5, so that the internal components of the battery pack are firmly fixed, and the mechanical performance of the battery pack is improved.
The master control unit 1 comprises a master control box body, and a BDU and a BMS are arranged in the master control box body. The total control box body is made of HC340/590DP material and is 2mm thick, and the reinforcing beam and the reinforcing rib structure are arranged in the total control box body to meet the strength requirement.
The third layer of module unit 2 comprises a box upper cover 21, a box lower cover 22, a battery module 23, a heat conducting pad 24, a low-voltage plug-in end 26, a module sampling joint 27 and a high-voltage plug-in end 25, wherein the box lower cover 22 is arranged below the box upper cover 21, a BMU, a high-voltage relay and a low-voltage plug-in are arranged on one side of the box lower cover 22, and the high-voltage plug-in end 25 and the low-voltage plug-in end 26 are respectively arranged at two ends of the box lower cover 22; preferably, the high-voltage plug-in end 25 comprises a positive plug-in end and a negative plug-in end, one side of the lower case 22 of the case body is provided with the positive plug-in end, and the other side is provided with the negative plug-in end; a plurality of battery module 23 of mid-mounting in box inferior valve 22, be equipped with heat conduction pad 24 between battery module 23 and the box inferior valve 22 bottom, one side of every battery module 23 all is equipped with module sampling joint 27, every module sampling joint 27 is connected to BMU's mainboard through the sampling pencil respectively on, BMU is connected to total control unit 1's BMS through low pressure plug-in components end 26 with the voltage and the temperature data of each battery module 23 through low pressure communication pencil, high-voltage relay is connected to total control unit 1's BMS through high-pressure connection pencil. Each battery module 23 is independently controlled through the BMU system, and independently monitors information such as temperature and voltage of an internal battery core of the battery module 23. Each battery module 23 is provided with an independent high-low voltage output unit, so that the real-time monitoring of the electrical performance is realized, and the stability of the quality of the battery system module is ensured.
Box inferior valve 22 is including being upper end open-ended rectangle shell structure, and box inferior valve 22 is inside to be separated into a plurality of module installation cavity 223 and two isolation cavities 222 by a plurality of baffles 221, and two isolation cavities 222 are located the both ends of box inferior valve 22 respectively, and isolation cavities 222 are used for installing BMU, high-voltage relay and low pressure plug-in components, and module installation cavity 223 is used for installing battery module 23.
The bottom of each box lower shell 22 is integrated with a liquid cooling pipe in a die-casting mode, the liquid cooling system 6 comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the water inlet of each liquid cooling pipe, and the water outlet pipe is communicated with the water outlet of each liquid cooling pipe. Preferably, the connection of the liquid cooling system of the three-layer module structure is realized by the integral liquid cooling system 6 through the quick-plug connector and the liquid cooling water pipe. Inside the box inferior valve 22 of each module unit with the liquid cooling system integration, reduce the inside space of box inferior valve 22 and use, with each inside subassembly temperature equilibrium of box inferior valve 22 simultaneously, improve product quality stability, the technology is simple and convenient, assembles simply, is fit for batch production. The independent liquid cooling system 6 is arranged at the bottom of each battery module 23, so that the temperature at the bottom of each battery module 23 is uniform and controllable, and the quality stability of the battery system module is ensured.
The bottom of the lower case 22 of the box body is in a die-casting mode, the liquid cooling pipes are integrated, the weight of the box body is reduced, the space occupied by the traditional liquid cooling plate is effectively reduced, and the energy density of the power battery pack system assembly is greatly improved.
The thickness of the lower shell 22 of the box body is 5mm, the whole box body is formed by casting aluminum, the material cost is low, and the process feasibility is high; the box upper cover 21 adopts PP + 30% GF material, and thickness 3mm has designed the structure of strengthening rib, has promoted the intensity of box upper cover 21.
The assembly support 5 comprises a main control fixing part 51, module fixing parts 52 and a hoisting part 53, the hoisting part 53 is arranged at the top of the assembly support 5, the main control fixing part 51 is arranged in the middle, a plurality of module fixing parts 52 are uniformly distributed below the assembly support 5, and the number of the module fixing parts 52 is the same as that of the module units; the cross section of the assembly bracket 5 is of a right-angled triangle structure, and the angle of a large acute angle A in the triangle is not less than 80 degrees. The stability of the assembly bracket 5 is ensured, and the module unit and the assembly unit 1 which are connected together are integrally fixed on the whole vehicle frame by the flanging.
The two sides of the box lower shell 22 are respectively provided with a plurality of groups of mounting holes, and each group of mounting holes is connected with the module fixing part 52 through bolts, so that the first layer module unit 4, the second layer module unit 3 and the first layer module unit 2 are fixedly connected together through the assembly bracket 5.
The master control fixing frame 7 is of a rectangular shell structure with an opening at one side, so that the weight is light, the overall weight of the equipment is reduced, and meanwhile, materials are saved; always controlling mount 7 one side and being equipped with turn-ups 71, the opposite side is equipped with connecting portion 72, and connecting portion 72 passes through bolted connection to always controlling fixed part 51, and turn-ups 71 fixed connection is to always controlling one side of box body for always controlling unit 1 and module unit fixed connection, and firm in connection, it is fixed reliable.
The BMU of the module unit and the electric system of the master control unit 1 are connected by the battery module 23 through a high-voltage cable and a low-voltage wire harness, and the cable and the wire harness are fixed on the box body lower shell 22 through the assembly support 5, so that the connection is firm and the fixation is reliable. The battery pack assembly is integrally composed of three battery module units and a master control unit, each module unit is independently controlled through a BMU system, and information such as temperature and voltage of an electric core in each battery module is independently monitored. Each battery module is provided with an independent liquid cooling system and a high-low voltage output unit, the temperature is balanced and controllable, the electrical performance is monitored in real time, and the quality stability of the battery system module is ensured.
Fig. 11 is a high-voltage electrical schematic diagram, and the power battery system is composed of a battery pack, a battery management system and an electrical system. The three parts are reasonably matched, and charge and discharge are carried out according to different working conditions and the requirements of the whole vehicle, and meanwhile, the state monitoring, the energy management, the safety management and the health management of the power battery are realized. The battery pack, i.e., the control unit of the battery module 23, wherein the electrical system is composed of a BDU, a high voltage connection and a low voltage control communication harness, and serves as a link between the battery management system and the battery pack, providing reliable hardware support for the battery management system, and being capable of performing power battery energy distribution and safety protection.
In one or more embodiments, the main parameters of the power battery pack system assembly are as follows:
| serial number | Item | Parameter(s) | |
| 1 | Nominal voltage (V) | 691.2 | |
| 2 | Nominal capacity (Ah) | 109 | |
| 3 | Nominal electric quantity (KWh) | 75.34 | |
| 4 | | 2P216S | |
| 5 | Voltage range (V) | 540～788.4 | |
| 6 | Usable electricity (KWh) | 71.5 | |
| 7 | Weight (kg) | ≈798.5 | |
| 8 | Energy Density (Wh/kg) | 94.3 |
In the design of the battery pack structure, the design of a battery system needs to ensure that the structure is reliable, the fixation is firm, and the process is easy to form and assemble. In order to meet the use requirements of battery pack system design, a new structure capable of effectively improving system assembly is urgently needed, connection and fixation of all components in a battery system are guaranteed to be firm, mechanical performance of the battery system is improved, temperature and voltage of all modules are monitored simultaneously, the temperature of each module unit cell is balanced by a liquid cooling system, the battery state of each module unit is monitored in real time by a BMS management system, after the battery state is correctly obtained, heat management, battery balance management, charge and discharge management, fault alarm and the like are carried out, a communication bus is established, and data exchange is realized for a display system, a whole vehicle controller, a charger and the like. (BMU gathers the battery state information data of every battery module through the low pressure pencil, and integration and through the transmission BCU of low pressure communication pencil, BCU carries out data processing and analysis to the battery state information data that data acquisition circuit gathered, by electric core control unit (ECU), then sends control command to relevant function module in the system according to the analysis result to outside transmission information, control relevant electron device among the BDU realizes the closure and the disconnection of system's circuit, improves product quality stability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a power battery package system assembly which characterized in that: the liquid cooling system comprises a master control unit, a plurality of layers of module units, an assembly support and a liquid cooling system, wherein the plurality of layers of module units are sequentially arranged from top to bottom through the assembly support, the master control unit is installed above the uppermost module unit, the bottom of each layer of module unit is connected to the liquid cooling system, and each layer of module unit is respectively in signal connection with the master control unit.
2. The power battery pack system assembly of claim 1, wherein: the module unit is 3, is the first layer module unit, second floor module unit and the first layer module unit that set gradually from bottom to top respectively, and the equal rigid coupling in both sides of every layer of module unit is to assembly support, and the top of third layer module unit is equipped with total accuse unit.
3. The power battery pack system assembly of claim 2, wherein: the total control unit comprises a total control box body, and a BDU and a BMS are arranged in the total control box body.
4. A power pack system assembly according to claim 3, wherein: the third layer of module unit comprises a box upper cover, a box lower cover, a battery module, a heat conducting pad, a low-voltage plug-in end, a module sampling joint and a high-voltage plug-in end, wherein the box lower cover is arranged below the box upper cover, a BMU, a high-voltage relay and a low-voltage plug-in are arranged on one side of the box lower cover, and the box lower cover is respectively provided with the high-voltage plug-in end and the low-voltage plug-in end; a plurality of battery module of mid-mounting in the box inferior valve, be equipped with the heat conduction pad between battery module and the box inferior valve bottom, one side of every battery module all is equipped with the module sampling and connects, every module sampling connects respectively through the sampling pencil be connected to BMU's mainboard on, BMU is connected to the BMS of total accuse unit through low pressure communication pencil, high-pressure relay is connected to the BMS of total accuse unit through high pressure connection pencil.
5. The power battery pack system assembly of claim 4, wherein: the high-voltage plug-in end comprises a positive plug-in end and a negative plug-in end, wherein the positive plug-in end is arranged on one side of the lower case of the case body, and the negative plug-in end is arranged on the other side of the lower case of the case body.
6. The power battery pack system assembly of claim 4, wherein: the bottom of the lower shell of each box body is integrated with one liquid cooling pipe in a die-casting mode, the liquid cooling system comprises a water inlet pipe and a water outlet pipe, the water inlet pipe is communicated with the water inlet of each liquid cooling pipe, and the water outlet pipe is communicated with the water outlet of each liquid cooling pipe.
7. The power battery pack system assembly of claim 1, wherein: the assembly support comprises a master control fixing part, module fixing parts and a hoisting part, the hoisting part is arranged at the top of the assembly support, the master control fixing part is arranged in the middle of the assembly support, a plurality of module fixing parts are uniformly distributed below the assembly support, and the number of the module fixing parts is the same as that of the module units;
8. the power battery pack system assembly of claim 7, wherein: the cross section of the assembly bracket is of a right-angled triangle structure, and the angle of a large acute angle A in the triangle is not less than 80 degrees.
9. The power battery pack system assembly of claim 7, wherein: the total control fixing frame is a rectangular shell structure with an opening on one side, a flanging is arranged on one side of the total control fixing frame, a connecting portion is arranged on the other side of the total control fixing frame, the connecting portion is connected to the total control fixing portion through a bolt, and the flanging is fixedly connected to one side of the total control box body.
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| CN202110627300.2A CN113488734A (en) | 2021-06-04 | 2021-06-04 | Power battery pack system assembly |
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| CN202110627300.2A CN113488734A (en) | 2021-06-04 | 2021-06-04 | Power battery pack system assembly |
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Application publication date: 20211008 |