CN111509156A - Highly-integrated compact battery system - Google Patents

Highly-integrated compact battery system Download PDF

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Publication number
CN111509156A
CN111509156A CN202010295413.2A CN202010295413A CN111509156A CN 111509156 A CN111509156 A CN 111509156A CN 202010295413 A CN202010295413 A CN 202010295413A CN 111509156 A CN111509156 A CN 111509156A
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CN
China
Prior art keywords
cabin
water
box body
battery system
plate
Prior art date
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Pending
Application number
CN202010295413.2A
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Chinese (zh)
Inventor
安占旺
信召峰
杨乐乐
赵晓军
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lishen Qingdao New Energy Co Ltd
Original Assignee
Lishen Power Battery System Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lishen Power Battery System Co Ltd filed Critical Lishen Power Battery System Co Ltd
Priority to CN202010295413.2A priority Critical patent/CN111509156A/en
Publication of CN111509156A publication Critical patent/CN111509156A/en
Pending legal-status Critical Current

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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
    • 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
    • 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
    • H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
    • H01M10/647—Prismatic or flat cells, e.g. pouch cells
    • 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
    • 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
    • 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
    • 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
    • H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell casings
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Battery Mounting, Suspending (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a highly integrated compact battery system, which comprises a lower box body (7); a plurality of battery modules (4) are arranged in the lower box body; the top of the lower box body is fixedly provided with a battery system upper cover (1); the lower box body comprises a box body frame; an integrated water-cooling bottom plate (73) and a box bottom plate protective plate (76) are welded at the bottom of the box frame from top to bottom in sequence; the left side of the top of the integrated water-cooling bottom plate (73) is welded with a front cabin dividing beam (711) and a rear cabin dividing beam (711) which are longitudinally distributed; a front and rear compartment dividing beam (711) for dividing the lower box (7) into a front compartment and a rear compartment; wherein the front cabin is positioned on the left side of the rear cabin; the front cabin is used for installing a plurality of preset battery system components; the rear cabin is used for placing a plurality of battery modules (4). The liquid cooling system is scientific in structural design, can reasonably distribute high and low voltages while allowing the battery system to contain liquid cooling, can well solve the problem of water cooling leakage, and improves the safety of the battery system.

Description

Highly-integrated compact battery system
Technical Field
The invention relates to the technical field of batteries for electric vehicles, in particular to a highly-integrated compact battery system.
Background
At present, along with the popularization of electric vehicles, electric vehicle manufacturers put forward higher requirements on the energy density and the safety of the electric vehicles, but most high-low voltage layouts of the battery systems in the market are disordered at present, the problem of water cooling and high-low voltage crossing exists, and more potential safety hazards exist in the battery systems.
Therefore, there is an urgent need to develop a technology that can reasonably distribute high and low voltages while allowing the battery system to contain liquid cooling, thereby greatly improving the safety of the battery system.
And can well solve the problem of water cooling leakage,
disclosure of Invention
The invention aims to provide a highly-integrated compact battery system aiming at the technical defects in the prior art.
To this end, the present invention provides a highly integrated compact battery system including a hollow lower case;
a plurality of battery modules are arranged in the lower box body;
the top of the lower box body is fixedly provided with a battery system upper cover;
the lower box body comprises a box body frame;
an integrated water-cooling bottom plate and a box body bottom plate protection plate are welded at the bottom of the box body frame in sequence from top to bottom;
the left side of the top of the integrated water-cooling bottom plate is welded with longitudinally distributed front and rear cabin dividing beams;
the front cabin and rear cabin dividing beam is used for dividing the lower box body into a front cabin and a rear cabin;
wherein the front cabin is positioned on the left side of the rear cabin;
the front cabin is used for installing a plurality of preset battery system components;
the rear cabin is used for placing a plurality of battery modules.
The box body frames comprise a second box body longitudinal frame and a first box body longitudinal frame which are distributed at left and right intervals, and a second box body transverse frame and a first box body transverse frame which are distributed at front and back intervals;
the front end and the rear end of the longitudinal frame of the second box body and the longitudinal frame of the first box body are respectively connected with one end of the transverse frame of the second box body and one end of the transverse frame of the first box body which are adjacent.
The first front cabin beam, the second front cabin beam and the third front cabin beam are welded in the front cabin from front to back in sequence;
a first transverse beam is welded at the longitudinal middle position of the rear cabin.
The top of the integrated water-cooling bottom plate is respectively bonded with a transversely-distributed PC sheet at the front side and the rear side below each battery module;
two PC sheets distributed in the front and back, a front and back cabin dividing beam positioned on the left side and a first box body longitudinal frame positioned on the right side are combined to form a closed area A;
and heat conduction structure glue is filled in each closed area A and is bonded with one battery module through the heat conduction structure glue.
The second box body transverse frame, the front and rear cabin dividing beams, the third front cabin beam and the second box body longitudinal frame are combined together to form a closed area B which is used as an installation space of a water inlet assembly in the water cooling pipe assembly;
the second box transverse frame, the front cabin dividing beam, the rear cabin dividing beam, the first front cabin beam and the second box longitudinal frame are combined together to form a closed area E which is used as an installation space of a water outlet assembly in the water cooling pipe assembly;
the third front cabin beam, the front and rear cabin dividing beam, the second front cabin beam and the second box body longitudinal frame are combined together to form a closed area C which is used as an installation space of a high-voltage control unit BDU;
the first front cabin beam, the front and rear cabin dividing beam, the second front cabin beam and the second box body longitudinal frame are combined together to form a closed area D which is used as an installation space of a battery management system BMS.
The left end and the right end of each battery module are fixedly connected with a module end plate through module fixing bolts respectively;
the side around each battery module is surrounded and is overlapped with a plurality of packing area.
Wherein, the front end and the rear end of each module end plate are respectively provided with a module end plate mounting hole;
the module end plates of any two adjacent battery modules are connected through an inter-module connecting sheet.
The middle part of the connecting sheet between the modules is provided with a wire harness fixing hole;
the front end and the rear end of the inter-module connecting piece are respectively provided with an inter-module connecting piece mounting hole.
The integrated water-cooling bottom plate comprises a water-cooling plate upper plate and a water-cooling plate lower plate which are distributed up and down;
the water cooling plate upper plate and the water cooling plate lower plate are welded together;
two water receiving ports are formed on the upper plate of the water cooling plate;
the lower plate of the water cooling plate is provided with water circulation grooves distributed in a surrounding manner;
two water receiving openings are arranged corresponding to the front end and the rear end of the water circulation groove and are communicated with each other.
Compared with the prior art, the high-integration compact battery system provided by the invention has the advantages that the structural design is scientific, the battery system can contain liquid cooling, meanwhile, the high voltage and the low voltage can be reasonably distributed, the safety of the battery system is greatly improved, and the high-integration compact battery system has great production practice significance.
In addition, the integrated compact battery system provided by the invention can well solve the problem of water cooling leakage, and further improves the safety of the battery system.
Drawings
Fig. 1 is an exploded view of the overall structure of a highly integrated compact battery system according to the present invention;
fig. 2 is a schematic diagram illustrating an overall structure of a highly integrated compact battery system according to the present invention;
fig. 3 is a top view of the inside of the lower case (with the upper cover removed and the rest of the inside part included) in the highly integrated compact battery system provided by the present invention;
fig. 4 is a schematic view of a lower case of a highly integrated compact battery system according to the present invention;
fig. 5 is an exploded view of a lower case of a highly integrated compact battery system according to the present invention;
fig. 6 is an exploded view of an integrated water-cooled bottom plate of a highly integrated compact battery system according to the present invention;
fig. 7 is a schematic diagram of a module of a highly integrated compact battery system according to the present invention;
fig. 8 is a schematic view of a module packing belt of a highly integrated compact battery system according to the present invention;
fig. 9 is a schematic view of a module end plate of a highly integrated compact battery system according to the present invention;
fig. 10 is a schematic view of inter-module connecting tabs of a highly integrated compact battery system according to the present invention;
in the figure: 1. a battery system upper cover; 2. a module fixing bolt;
3. connecting the inter-module connecting sheet; 31. a wire harness fixing hole; 32. connecting sheet mounting holes; 4. a battery module; 41. a module end plate; 411. a module end plate mounting hole; 42. packing a belt; 421. a thermoplastic jacket insulation layer;
5. MSD (manual cut unit); 6. a PC sheet;
7. a lower box body; 71. a first box body transverse frame 1; 72. a first box longitudinal frame 1;
73. an integrated water-cooled bottom plate; 731. water cooling plate upper plate; 732. a water-cooling plate lower plate;
74. a first transverse beam; 75. a second box transverse frame 2; 76. a box body bottom plate protecting plate; 77. a first front deck beam; 78. a second box longitudinal frame; 79. a second front deck beam; 710. a third front deck beam; 711. a front and rear cabin dividing beam;
8. a water-cooled tube assembly; 9. a low-voltage plug-in; 10. a high-voltage plug-in;
11. BMS (battery management system); 12. BDU (high voltage control unit).
Detailed Description
In order to make the technical means for realizing the invention easier to understand, the following detailed description of the present application is made in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant application and are not limiting of the application. It should be noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
It should be noted that in the description of the present application, the terms of direction or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present application.
In addition, it should be noted that, in the description of the present application, unless otherwise explicitly specified and limited, the term "mounted" and the like should be interpreted broadly, and may be, for example, either fixedly mounted or detachably mounted.
The specific meaning of the above terms in the present application can be understood by those skilled in the art as the case may be.
Referring to fig. 1 to 10, the present invention provides a highly integrated compact battery system including a hollow lower case 7;
a plurality of battery modules 4 (for example, four battery modules as shown in fig. 1) are placed in the lower case 7;
the top of the lower box body 7 is fixedly provided with a battery system upper cover 1;
the lower box body 7 comprises a box body frame;
an integrated water-cooling bottom plate 73 and a box bottom plate protective plate 76 are welded at the bottom of the box frame from top to bottom in sequence;
the left side of the top of the integrated water-cooling bottom plate 73 is welded with a front cabin dividing beam 711 and a rear cabin dividing beam 711 which are longitudinally distributed;
a front and rear compartment dividing beam 711 for dividing the lower box 7 into a front compartment and a rear compartment;
wherein the front cabin is positioned on the left side of the rear cabin;
the front cabin is used for installing a plurality of preset battery system components;
the rear compartment is used to house a plurality of battery modules 4 (e.g., four as shown in fig. 1).
In the invention, in a concrete implementation, the box body frames comprise a second box body longitudinal frame 78 and a first box body longitudinal frame 72 which are distributed at intervals from left to right, and a second box body transverse frame 75 and a first box body transverse frame 71 which are distributed at intervals from front to back;
the front and rear ends of the second box longitudinal frame 78 and the first box longitudinal frame 72 are respectively connected (e.g., welded) to one end of the second box transverse frame 75 and one end of the first box transverse frame 71 which are adjacent to each other.
In the present invention, in a concrete implementation, the front cabin is provided with a water cooling pipe assembly 8, a BMS (battery management system) 11 and a BDU (high voltage control unit) 12;
wherein, a high-voltage plug-in 10 is arranged on a BDU (high-voltage control unit) 12;
a low voltage plug 9 is mounted on a BMS (battery management system) 11.
In the specific implementation, an MSD (manual cutting unit) 5 is further mounted at the rear end of the lower box body 7.
In the invention, in the concrete implementation, a first front cabin beam 77, a second front cabin beam 79 and a third front cabin beam 710 are welded in the front cabin from front to back in sequence;
in the longitudinal middle of the rear compartment, a first transverse beam 74 is welded.
In the present invention, specifically, a laterally distributed PC sheet 6 (i.e., polycarbonate sheet) is bonded to the top of the integrated water-cooled bottom plate 73 at the front and rear sides below each battery module 4;
two PC sheets 6 distributed in the front and back, a front and back cabin dividing beam 711 positioned on the left side and a first box body longitudinal frame 72 positioned on the right side are combined to form a closed area A;
and heat conduction structure glue is filled in each closed area A and is bonded with one battery module 4 through the heat conduction structure glue.
In the invention, in a concrete implementation, the left end and the right end of each battery module 4 are respectively and fixedly connected with a module end plate 41 through module fixing bolts 2;
a plurality of packing belts 42 (specifically, steel belts) are looped around the peripheral side surfaces of each battery module 4.
In particular, the front end and the rear end of each module end plate 41 are respectively provided with a module end plate mounting hole 411;
the module end plates 41 of any two adjacent battery modules 4 are connected to each other by an inter-module connecting sheet 3 (by bolts).
In the concrete implementation, the middle part of the inter-module connecting sheet 3 is provided with a wire harness fixing hole 31;
the front end and the rear end of the inter-module connecting sheet 3 are respectively provided with an inter-module connecting sheet mounting hole 32;
the connecting sheet mounting holes 3 between two modules are correspondingly disposed in the module end plate mounting holes 411 of the two adjacent module end plates 41.
In the present invention, in a specific implementation, the integrated water-cooling bottom plate 73 includes a water-cooling plate upper plate 731 and a water-cooling plate lower plate 732 which are distributed up and down;
the water cooled plate upper plate 731 and the water cooled plate lower plate 732 are welded together.
In particular, two water receiving ports 7311 are formed on the upper plate 731 of the water cooling plate;
the water cooling plate lower plate 732 is provided with water circulation grooves 7321 distributed circumferentially;
two water receiving ports 7311 are disposed corresponding to the front and rear ends of the water circulation groove 7321 and are communicated with each other.
It should be noted that, in the present invention, the integrated water-cooling bottom plate 73 is integrated at the bottom of the lower box 7 of the battery system, and is formed by two parts, wherein the water-cooling plate lower plate 732 is formed by punching an aluminum plate, and the cooling liquid can pass through the punched water circulation groove to achieve the cooling effect, while the water-cooling plate upper plate 731 is an aluminum plate to ensure complete adhesion with the bottom surface of the battery module (i.e. the whole formed by a plurality of battery modules), and the water-cooling plate lower plate 732 and the water-cooling plate upper plate 731 are welded together to ensure that the water of the water-cooling plate is not leaked; the integrated water-cooled bottom plate 73 serves as the bottom of the battery system and has the effects of bottom sealing and water cooling.
It should be noted that a casing bottom plate protection plate 76 is provided below the integrated water-cooled bottom plate 73 of the lower casing 7 to protect the integrated water-cooled bottom plate 73 and to provide a secondary sealing effect to the bottom of the battery system.
In the invention, the box body main body is formed by aluminum extrusion, and the integrated water-cooling bottom plate (namely a water-cooling plate) and the box body bottom plate protection plate are formed by aluminum plate punch forming, thereby ensuring good structural strength.
It should be noted that, for the invention, the battery module, the BMS, the BDU, the water-cooling water inlet/outlet, and the like respectively have a relatively closed area, which ensures the high-low pressure separation, the dry-wet separation, and greatly improves the safety of the battery system:
for the invention, two adjacent PC sheets 6, the longitudinal frame 72 of the first box body and the front and rear cabin partition beams 711 are combined into a closed area A for gluing or encapsulating heat-conducting glue and bonding with the bottom of the battery module;
for the invention, the second box body transverse frame 78, the front and rear cabin dividing beam 711, the third front cabin beam 710 and the second box body longitudinal frame 78 are combined together to form a closed area B which is used as an installation space of a water inlet assembly in the water cooling pipe assembly 8;
for the invention, the second box body transverse frame 78, the front and rear cabin dividing beam 711, the first front cabin beam 77 and the second box body longitudinal frame 78 are combined together to form a closed area E which is used as an installation space of a water outlet assembly in the water cooling pipe assembly;
the third front cabin beam 710, the front and rear cabin dividing beam 711, the second front cabin beam 79 and the second box body longitudinal frame 78 are combined together to form a closed area C which is used as an installation space of a BDU (high pressure control unit);
the first front deck beams 77, the front and rear deck partition beams 711, the second front deck beams 79, and the second case longitudinal frame 78 are combined together into one closed area D for use as an installation space of a BMS (battery management system).
It should be noted that, the rear compartment of the lower battery box is divided into a plurality of regions, each region is provided with a plurality of modules, and the end plates at the two ends of the battery module 4 are fixed to the longitudinal frame 72 of the first box and the dividing beam 711 of the front and rear compartments, so as to play a good role in the safety of the battery module 4.
According to the battery box body, the PC sheets 6 are adhered to two sides below each battery module, the two PC sheets 6, the first box body longitudinal frame 72 of the rear cabin and the front and rear cabin dividing beams 711 form a closed area A, and before the battery module 4 is assembled, glue needs to be applied or heat-conducting structural glue needs to be poured into the closed area, so that when the module is installed, the bottom surface of the battery module 4 is firmly adhered to the upper surface of the integrated water-cooling bottom plate 73 of the battery box body, and good heat-conducting performance is guaranteed.
It should be noted that, in the present invention, a plurality of distances are reserved between the bottom of the battery module 4 and the upper surface of the integrated water-cooling bottom plate 73 of the case, so that the structural adhesive or the heat-conducting structural adhesive can be well accommodated.
In the invention, in particular, the outer surface of the packing belt 42 of the battery module is coated with the thermoplastic sleeve for playing a good role in promoting the insulation effect inside the battery module.
In the present invention, in a concrete implementation, the adjacent module end plates 41 and the module end plates 41 connect the two battery modules through the inter-module connecting sheet 3, and by analogy, all the module end plates are connected together, thereby greatly increasing the installation stability of the battery modules.
In the present invention, in particular, the number of cells in each battery module 4 can be increased or decreased as the length of the rear compartment of the battery box is increased or decreased, and the number of modules can be increased or decreased as the width of the rear compartment of the battery box is increased or decreased, thereby maximizing the use of the existing space.
It should be noted that, in the invention, the rear cabin of the battery box body is divided into a plurality of areas, each area is provided with a plurality of modules, and the end plates at the two ends of each module are fixed on the front beam and the rear beam of the rear cabin, thereby playing a good role in the safety of the modules.
For the present invention, the assembly process is as follows:
firstly, combining a first box transverse frame 71, a first box longitudinal frame 72, a second box transverse frame 75 and a second box longitudinal frame 78 into a box frame, and then welding an integrated water-cooling bottom plate 73, a box bottom plate protection plate 76, a front and rear cabin dividing beam 711, a first transverse beam 74, a first front cabin beam 77, a second front cabin beam 79 and a third front cabin beam 710 in sequence to finish the installation of the box; PC sheets 6 are adhered to two sides below the battery module 4;
then, gluing or encapsulating heat-conducting structural adhesive in a closed area A formed by combining two PC sheets 6 below the battery module 4, a front cabin dividing beam 711, a rear cabin dividing beam 711 and a first box longitudinal frame 72, then placing the battery module 4 above the heat-conducting structural adhesive according to the specification, fixing the module end plates 41 by using module fixing bolts 2, and before fixing the module end plates 41, placing an inter-module connecting sheet 3 between two adjacent module end plate mounting holes 411 to ensure that all the module end plates 41 are fixed together;
then, the MSD5, the BDU12, the BMS11, the high-voltage plug 10, the low-voltage plug 9, the water-cooled tube assembly 8, the copper bar, the wire harness and the like are installed, and finally, the upper cover 1 is buckled, so that the assembly of the battery system is completed.
In order to more clearly understand the technical solution of the present invention, the following describes the working principle of the present invention.
The working principle of the invention is as follows: the box body is divided into a front cabin and a rear cabin. The rear cabin is divided into a plurality of areas to place the modules, a closed area formed by the PC sheet and the box body beam is arranged below each module and used for gluing or pouring glue, and the modules are fixed with the box body through the end plate fixing holes, so that good structural strength and heat conducting performance are guaranteed. The front cabin is divided into a plurality of areas, the BDU, the BMS, the water-cooling pipe assembly and the like are respectively placed, each part is guaranteed to have a relatively closed area, the effects of separating the high-pressure part, the low-pressure part, the water-cooling joint and the like are achieved, the high-pressure and low-pressure separation and the dry-wet separation are guaranteed, the safety of a battery system is guaranteed to the maximum extent, meanwhile, the structural strength of each area is also guaranteed, and therefore the overall structural strength is guaranteed. Meanwhile, the invention can greatly improve the grouping efficiency of the battery system.
It should be noted that all the essential changes or improvements according to the present invention, such as the replacement of the integrated water-cooled bottom plate by the stamping plate, the replacement of the front and rear compartment division beams of the box body by a plurality of beams, the replacement of the bottom protection plate by the plastic plate bolt, the fine adjustment of each region of the front and rear compartments, etc., are all within the protection scope of the present invention.
Compared with the prior art, the highly-integrated compact battery system provided by the invention has the following beneficial effects:
the battery system box body is divided into a front cabin and a rear cabin through the internal beam, the rear cabin is divided into a plurality of areas for placing the modules, the front cabin is divided into a plurality of areas for placing BMS, BDU, water-cooling inlet and outlet assemblies and the like, the lower box body is integrated with liquid cooling, the structure is reasonable, the layout is compact, the safety is good, and the battery system box body plays a good role in improving the safety and the energy density of a battery system.
Compared with the prior art, the high-integration compact battery system provided by the invention has the advantages that the structural design is scientific, the battery system can contain liquid cooling, meanwhile, the high voltage and the low voltage can be reasonably distributed, the safety of the battery system is greatly improved, and the high-integration compact battery system has great production practice significance.
In addition, the integrated compact battery system provided by the invention can well solve the problem of water cooling leakage, and further improves the safety of the battery system.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (9)

1. A highly integrated compact battery system, characterized by comprising a hollow lower case (7);
a plurality of battery modules (4) are arranged in the lower box body (7);
the top of the lower box body (7) is fixedly provided with a battery system upper cover (1);
the lower box body (7) comprises a box body frame;
an integrated water-cooling bottom plate (73) and a box bottom plate protective plate (76) are welded at the bottom of the box frame from top to bottom in sequence;
the left side of the top of the integrated water-cooling bottom plate (73) is welded with a front cabin dividing beam (711) and a rear cabin dividing beam (711) which are longitudinally distributed;
a front and rear compartment dividing beam (711) for dividing the lower box (7) into a front compartment and a rear compartment;
wherein the front cabin is positioned on the left side of the rear cabin;
the front cabin is used for installing a plurality of preset battery system components;
the rear cabin is used for placing a plurality of battery modules (4).
2. The highly integrated compact battery system according to claim 1, wherein the case frame includes a second case longitudinal frame (78) and a first case longitudinal frame (72) which are spaced left and right, and a second case lateral frame (75) and a first case lateral frame (71) which are spaced front and rear;
the front end and the rear end of the second box longitudinal frame (78) and the front end and the rear end of the first box longitudinal frame (72) are respectively connected with one end of the adjacent second box transverse frame (75) and one end of the adjacent first box transverse frame (71).
3. A highly integrated compact battery system according to claim 2, characterized in that a first front deck beam (77), a second front deck beam (79) and a third front deck beam (710) are welded in this order from front to back in the front deck;
a first transverse beam (74) is welded at the longitudinal middle position of the rear cabin.
4. The highly integrated compact battery system according to claim 2, wherein a laterally distributed PC sheet (6) is bonded to the top of the integrated water-cooled bottom plate (73) at the front and rear sides below each battery module (4);
two PC sheets (6) distributed in the front and back, a front and back cabin dividing beam (711) positioned on the left side and a first box body longitudinal frame (72) positioned on the right side are combined to form a closed area A;
and heat-conducting structural adhesive is filled in each closed area A and is bonded with one battery module (4) through the heat-conducting structural adhesive.
5. The highly integrated compact battery system according to claim 2, characterized in that the second box lateral frame (78), the front and rear deck dividing beam (711), the third front deck beam (710) and the second box longitudinal frame (78) are combined together into one closed area B for the installation space of the water inlet assembly in the water cooling pipe assembly (8);
the transverse frame (78) of the second box body, the front and rear cabin dividing beam (711), the first front cabin beam (77) and the longitudinal frame (78) of the second box body are combined together to form a closed area E which is used as an installation space of a water outlet assembly in the water cooling pipe assembly;
the third front cabin beam (710), the front and rear cabin dividing beam (711), the second front cabin beam (79) and the second box body longitudinal frame (78) are combined together to form a closed area C which is used as an installation space of a high-voltage control unit BDU;
the first front cabin beam (77), the front and rear cabin dividing beam (711), the second front cabin beam (79) and the second box body longitudinal frame (78) are combined together to form a closed area D which is used as an installation space of the battery management system BMS.
6. The highly integrated compact battery system according to claim 1, wherein a module end plate (41) is fixedly connected to each of the left and right ends of each battery module (4) by a module fixing bolt (2);
a plurality of packing belts (42) are sleeved on the peripheral side surface of each battery module (4) in a surrounding way.
7. The highly integrated compact battery system according to claim 6, wherein each of the module end plates (41) has one module end plate mounting hole (411) at each of the front and rear ends thereof;
the module end plates (41) of any two adjacent battery modules (4) are connected through an inter-module connecting sheet (3).
8. The highly integrated compact battery system according to claim 7, wherein the intermediate portion of the inter-module connecting piece (3) has a wire harness fixing hole (31);
the front end and the rear end of the inter-module connecting piece (3) are respectively provided with an inter-module connecting piece mounting hole (32).
9. The highly integrated compact battery system according to any of claims 1 to 8, characterized in that the integrated water-cooled bottom plate (73) comprises a water-cooled plate upper plate (731) and a water-cooled plate lower plate (732) which are distributed up and down;
the water cooling plate upper plate (731) and the water cooling plate lower plate (732) are welded together;
two water receiving ports (7311) are arranged on the water cooling plate upper plate (731);
the water cooling plate lower plate (732) is provided with water circulation grooves (7321) distributed around;
two water receiving ports (7311) are arranged corresponding to the front and rear ends of the water circulation groove (7321) and are communicated with each other.
CN202010295413.2A 2020-04-15 2020-04-15 Highly-integrated compact battery system Pending CN111509156A (en)

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