CN112072026A - Power battery pack - Google Patents
Power battery pack Download PDFInfo
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- CN112072026A CN112072026A CN202010922823.5A CN202010922823A CN112072026A CN 112072026 A CN112072026 A CN 112072026A CN 202010922823 A CN202010922823 A CN 202010922823A CN 112072026 A CN112072026 A CN 112072026A
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- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C3/00—Fire prevention, containment or extinguishing specially adapted for particular objects or places
- A62C3/16—Fire prevention, containment or extinguishing specially adapted for particular objects or places in electrical installations, e.g. cableways
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
- H01M10/482—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte for several batteries or cells simultaneously or sequentially
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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
- H01M10/64—Heating or cooling; Temperature control characterised by the shape of the cells
- H01M10/647—Prismatic or flat cells, e.g. pouch 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
- H01M10/60—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
- H01M10/6568—Liquids characterised by flow circuits, e.g. loops, located externally to the cells or cell 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
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention discloses a power battery pack which comprises a box cover assembly, a battery tray assembly, a high-voltage electrical component, a battery core body, a high-voltage busbar, a sampling wire harness, an insulation protection component, a BMS component and a pipeline, wherein the box cover assembly is arranged on the box cover assembly; the insulation protection component is located the case lid assembly with between the battery tray assembly, the battery tray assembly includes outer tray and inner tray, is equipped with a plurality of vertically and horizontally staggered's baffle on the inner tray, and a plurality of baffles enclose into a plurality of recesses that are used for holding the battery core, and high-voltage electrical component installs the side of inner tray, high-voltage bus, sampling pencil, BMS unit mount are between insulation protection component and inner tray, insulation protection component and inner tray fixed connection, high-voltage bus is arranged and is used for connecting the free output utmost point post of electric core in order to constitute required series-parallel connection form, sampling pencil respectively with battery core and BMS unit electric connection. The invention can solve the problems of increased cost and weight of the battery pack, complex assembly process and low space utilization rate in the battery pack in the prior art.
Description
Technical Field
The invention relates to the technical field of automobile parts, in particular to a power battery pack.
Background
With the rapid development of the automobile industry and the continuous improvement of living conditions of people, automobiles become one of indispensable transportation tools for people to go out. The automobile keeping amount is increased year by year, and more people own private cars. At present, with the continuous improvement of environmental protection consciousness of people, new energy automobiles, especially electric automobiles are rapidly developed.
The power battery pack is an important component of an electric automobile, and in the prior art, a plurality of battery cells are assembled into a battery module, and then the battery module is assembled into a battery pack shell to form the power battery pack, so that a plurality of redundant mechanical components and gaps exist in the power battery pack, and the problems of increased cost and weight of the battery pack, complex assembly process and low space utilization rate in the battery pack are caused.
Disclosure of Invention
The invention aims to provide a power battery pack to solve the problems that in the prior art, the cost and the weight of the battery pack are increased, the assembly process is complex, and the space utilization rate in the battery pack is low.
A power battery pack comprises a box cover assembly, a battery tray assembly, a high-voltage electrical component, a battery core body, a high-voltage bus, a sampling wire harness, an insulation protection component, a BMS component and a pipeline;
the insulation protection component is positioned between the box cover assembly and the battery tray assembly, the battery tray assembly comprises an outer tray and an inner tray, the inner tray is fixed in the outer tray, a plurality of criss-cross partition plates are arranged on the inner tray, a plurality of grooves for containing the battery cores are formed by the plurality of partition plates in a surrounding mode, and each battery core is sealed in an independently sealed cavity;
high-voltage electrical component installs the side of interior tray, high-voltage female arranging the sampling pencil BMS unit mount insulating protection component with between the interior tray, insulating protection component with interior tray fixed connection, high-voltage female arranging be used for with the free output terminal post of electric core is connected in order to constitute required series-parallel connection form, the battery core passes through female anodal terminal and the negative terminal of arranging of high-voltage externally realize the charge-discharge, the sampling pencil respectively with the battery core with BMS unit electric connection, the pipeline is used for connecting coolant liquid interface on the interior tray with the coolant liquid interface on the outer tray.
The power battery pack provided by the invention has the following beneficial effects:
(1) the battery cores are directly grouped into the power battery pack, the groove wall surface of the inner tray becomes a shell of the battery cores, the traditional conductive bars among modules are simplified into high-voltage bus bars, and meanwhile, criss-cross partition plates on the inner tray replace reinforcing beams in the box body, so that the weight of the power battery pack is remarkably reduced;
(2) the cost is reduced, the high-voltage bus, the sampling wire harness, the BMS assembly and the insulation protection assembly are integrated on the inner tray, the integration level of the system is improved, the number of parts is greatly reduced, the process links are reduced, the assembly process is simplified, and the cost of the battery pack is reduced;
(3) space utilization is high, because directly be power battery package in groups with the battery core, compressed prior art's module and arranged clearance, interior stiffening beam space, thermal management subassembly of box and arrange space, module sampling pencil and arrange space etc. more spaces can be used for arranging the battery core to arrange more batteries in the same envelope space.
In addition, the power battery pack provided by the invention can also have the following additional technical characteristics:
further, the case lid assembly includes battery case lid, case lid connecting piece, ventilative relief valve and valve body connecting piece, be equipped with a plurality of on the flange edge of battery case lid be used for with the mounting hole that outer tray is connected, the case lid connecting piece will the battery case lid is installed on the outer tray, ventilative relief valve passes through the valve body connecting piece is installed on the battery case lid.
Further, the battery connecting piece adopts a hot-melting self-tapping screw.
Further, the insulating protection component comprises an insulating fireproof plate and a plurality of isolating strips, the isolating strips are made of elastomer materials, the insulating protection component is installed on the inner tray through a connecting piece, and in the installation state, the isolating strips are in a compressed state.
Furthermore, the insulating fireproof plate comprises a mica plate and an epoxy resin plate, the mica plate and the epoxy resin plate are integrated through glue, and the mica plate is located on the lower layer.
Further, the battery core body includes the winding body, top cap, anodal utmost point post, negative pole post, explosion-proof valve and annotates the liquid mouth, the top cap with the last border of recess is connected and is realized sealedly through bonding or welding process, through annotate the liquid mouth and pour into electrolyte into, female arranging of high pressure with anodal utmost point post with negative pole post forms required series-parallel connection form through laser welding to make up into the group battery.
Furthermore, a cooling liquid inlet and a cooling liquid outlet are respectively arranged on two sides of the inner tray, a plurality of flow collecting water channels and a plurality of heat exchange water channels are arranged in the inner tray, cooling liquid enters the flow collecting water channels on the water inlet side from the cooling liquid inlet, is further distributed to the heat exchange water channels, is collected to the flow collecting water channels on the water outlet side, and is discharged through the cooling liquid outlet, and the cooling liquid circularly flowing in the heat exchange water channels exchanges heat with the electrolyte of the battery core and the winding body through the wall surface of the groove.
Furthermore, the high-voltage electrical assembly comprises a negative electrode electric connector, a positive electrode electric connector, a battery power distribution unit and a high-voltage connector, positive and negative terminals of the high-voltage connector are respectively connected with corresponding terminals of the battery power distribution unit, and the BMS assembly is used for controlling on-off actions of an execution element in the battery power distribution unit so as to control the conduction states of the terminals of the high-voltage connector and the negative electrode electric connector and the terminals of the high-voltage connector and the positive electrode electric connector.
Further, be equipped with a plurality of sampling terminals on the sampling pencil, the sampling terminal is connected to through laser welding technology female arranging of high pressure, the connector of sampling pencil with the connecting wire harness butt joint of BMS subassembly.
Furthermore, the sampling wire harness adopts a flexible printed circuit board, and the sampling terminal adopts a nickel sheet.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view of an assembly structure of a power battery pack according to an embodiment of the invention;
fig. 2 is an exploded view of a power battery pack according to an embodiment of the present invention;
FIG. 3 is an exploded view of the lid assembly;
FIG. 4 is a schematic structural view of an insulation shield assembly;
fig. 5 is a schematic structural diagram (not assembled) of the inner tray, the battery core, the high-voltage busbar and the sampling wire harness;
fig. 6 is a schematic structural diagram (after assembly) of the inner tray, the battery core, the high-voltage busbar and the sampling wire harness;
FIG. 7 is an enlarged view of area A of FIG. 6;
FIG. 8 is a schematic view of the structure of the jelly roll and inner tray (after assembly);
FIG. 9 is a schematic view of the structure of the jelly roll and inner tray (unassembled);
FIG. 10 is a schematic view of the flow of cooling fluid in the inner tray;
FIG. 11 is a cross-sectional view taken at C-C of FIG. 10;
FIG. 12 is a schematic view of the vent path in the event of thermal runaway in the battery core;
fig. 13 is a schematic structural view of the outer tray.
Detailed Description
In order to make the objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. Several embodiments of the invention are presented in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "left," "right," "up," "down," and the like are for illustrative purposes only and do not indicate or imply that the referenced device or element must be in a particular orientation, constructed or operated in a particular manner, and is not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 to 13, a power battery pack according to an embodiment of the present invention includes a case cover assembly 1, a battery tray assembly 2, a high-voltage electrical component 3, a battery core 4, a high-voltage busbar 5, a sampling harness 6, an insulating protection component 7, a BMS component 8, and a pipeline 9.
The box cover assembly 1 has the functions of sealing, ventilation and pressure relief. The insulation protection component 7 is positioned between the box cover assembly 1 and the battery tray assembly 2.
The battery tray assembly 2 comprises an outer tray 21 and an inner tray 22, wherein the inner tray 22 is fixed in the outer tray 21, and a mechanical interface 211, a cooling liquid inlet joint 212 and a cooling liquid outlet joint 213 which are connected with the whole vehicle are arranged on the outer tray 21.
The inner tray 22 is used for containing the battery core 4 and the electrolyte, a plurality of criss-cross partition plates are arranged on the inner tray 22, the plurality of criss-cross partition plates surround to form a plurality of grooves 221 for containing the battery core 4, and each battery core 4 is sealed in an independent sealed cavity.
High-voltage electrical component 3 is installed the side of interior tray 22, female 3 that arranges of high pressure the sampling pencil 6 BMS subassembly 8 is installed insulating protective component 7 with between the interior tray 22. Wherein, the insulation protection component 7 is fixedly connected with the inner tray 22.
The high-voltage electrical assembly 3 comprises a negative electrical connector 31, a positive electrical connector 34, a battery power distribution unit 32 and a high-voltage connector 33, positive and negative terminals of the high-voltage connector 33 are respectively connected with corresponding terminals of the battery power distribution unit 32, and the BMS assembly 8 can control an actuating element in the battery power distribution unit 32 to complete on-off action so as to control whether the terminals of the high-voltage connector 33 are conducted with the negative electrical connector 31 and the positive electrical connector 34; the high-voltage busbar 5 connects output poles of the battery cell monomers 4 to form a required series-parallel connection form, and the high-voltage busbar 5 is made of aluminum alloy 6101-T63 materials in the embodiment.
The sampling wire harness 6 is electrically connected with the battery core 4 and the BMS assembly 8, and the BMS assembly 8 is used for collecting signals such as voltage and temperature of the battery core 4 so as to realize the balance function of the battery core 4; the insulation protection component 7 mainly plays a role in insulation and thermal event protection; the BMS module 8 includes a controller and a required connection harness; the pipeline 9 is used for connecting a cooling liquid interface on the inner tray 22 and a cooling liquid interface on the outer tray 21, and the pipeline 9 specifically comprises a water inlet pipe 92 and a water outlet pipe 91.
Referring to fig. 3, the cover assembly 1 includes a battery cover 11, a cover connector 12, a vent relief valve 13 and a valve connector 14; in the embodiment, the battery box cover 11 is made of aluminum alloy through stamping, and a plurality of mounting holes are formed in the flange edge of the battery box cover 11 and used for being connected with the outer tray 21; the battery box cover 11 is arranged on the outer tray 21 through the box cover connecting pieces 12, the battery connecting pieces 12 can be bolts, rivets, self-tapping screws and the like, and the embodiment has the advantages that the battery connecting pieces 12 are hot-melting self-tapping screws, so that pre-holes or mounting nuts are not needed on the flange surface of the outer tray 21, the manufacturing process of the outer tray 21 is simplified, and the cost is reduced; the installation state of the air-permeable pressure relief valve 13 meets the protection levels of IPX7 and IPX9K, a breathable film in the air-permeable pressure relief valve 13 can meet the waterproof and breathing requirements of the battery pack at the same time, and the air-permeable pressure relief valve 13 can open a pressure relief channel when the interior of the battery pack reaches the design pressure so as to quickly reduce the internal pressure of the battery pack; the vent relief valve 13 is mounted on the battery case cover 11 by a plurality of valve body connectors 14.
Referring again to fig. 4, the insulation shield assembly 7 includes an insulating fire shield 71 and a plurality of insulating strips 72; the insulating fireproof plate 71 has good electrical insulation, heat resistance and high strength, the preferable materials are mica, mica and glass fiber composite material, mica and epoxy resin composite material and the like, in the embodiment, the insulating fireproof plate 71 comprises a mica plate and an epoxy resin plate, the two plates are integrated by gluing, wherein the mica plate is positioned at the lower layer; the isolating strip 72 is made of an elastomer material and has flame-retardant and heat-resistant characteristics, in the embodiment, the isolating strip 72 is made of foamed silica gel and is adhered to the mica plate through flame-retardant double-faced adhesive; the insulation shield assembly 7 is mounted on the inner tray 22 by a connector, in which state the spacer 72 is in a compressed state.
Referring to fig. 5, the inner tray 22 is provided with a cooling liquid inlet 222 and a cooling liquid outlet 223 at two sides thereof, in an embodiment, the main material of the inner tray 22 is a PPS material reinforced by glass fiber, and has the following typical properties: the density is about 1.82g/cm3The tensile strength is 240MPa, the bending strength is 330MPa, the V0 flame retardant rating, the heat deformation temperature is 266 ℃, the heat conductivity coefficient is 2W/m.K, and the dielectric strength is more than 18 kV/mm; each battery cell 4 is fitted into the groove 221 of the inner tray 22, the top cover of the battery cell 4 and the upper edge of the groove 221 are joined and sealed by a bonding or welding process, and each battery cell 4 is partitioned in an individually closed case.
The high-voltage bus bars 5 are connected with the output poles of the battery cores 4 to form a suitable series-parallel combination, and the high-voltage bus bars 5 can be mechanically fixed and electrically conducted with the output poles of the battery cores 4 through a laser welding process.
The sampling harness 6 is provided with a plurality of sampling terminals 62, the sampling terminals 62 are connected to the high-voltage bus bar 5 through a laser welding process, so that good electric conduction and heat conduction performance between the sampling terminals 62 and the high-voltage bus bar 5 are realized, in the embodiment, the sampling harness 6 is a Flexible Printed Circuit (FPC), and the sampling terminals 62 of the sampling harness 6 are nickel sheets; the connector 61 of the sampling harness 6 and the connection harness of the BMS module 8 are butted, so that the BMS module 8 realizes the detection of the voltage and the temperature of the battery core 4.
Please refer to fig. 6 to 8, the inner tray 22 is provided with a plurality of connecting members 224 for mounting the insulation protection assembly 7, and the connecting members 224 are metal nuts embedded in the inner tray 22; each battery core body 4 is provided with a positive pole post 44 and a negative pole post 43, and the plurality of high-voltage busbars 5 are welded with the positive pole posts 44 and the negative pole posts 43 of the plurality of battery core bodies 4 by laser to form a battery pack which is suitable for series-parallel combination; the battery core body 4 is externally charged and discharged through a positive terminal 51 and a negative terminal 52 of the high-voltage busbar 5, wherein the positive terminal 51 is connected with the positive electric connecting piece 34, and the negative terminal 52 is connected with the negative electric connecting piece 31; the sampling wire harness 6 is provided with a plurality of sampling terminals 62 and a temperature sensor 63, the temperature sensor 63 is a patch type thermocouple sensor, and the temperature sensor 63 detects the temperature of the battery core 4 by measuring the temperature of the sampling terminals 62; a plurality of mounting holes 64 are formed in the sampling harness 6 for fixing the sampling harness 6; the battery core 4 is injected with electrolyte through the injection port 41, and the high-voltage busbar 5 and the sampling wire harness 6 do not shield the explosion-proof valve 42 of the battery core 4.
Please refer to fig. 9, the inner tray 22 is provided with a connecting member 225 in the area below the positive terminal 51 and the negative terminal 52 of the high voltage bus bar 5, in the embodiment, the connecting member 225 is a metal nut embedded in the inner tray 22, so as to connect the positive terminal 51 with the positive electrical connecting member 34 and connect the negative terminal 52 with the negative electrical connecting member 31 through a bolt; the inner tray 22 is provided with a plurality of positioning columns 226, when the sampling wiring harness 6 is installed, the installation holes 64 are matched with the positioning columns 226 so as to limit the position of the sampling wiring harness 6, and the positioning columns 226 are hot-melted and pressed down to form a mushroom-head-shaped head part so as to limit the sampling wiring harness 6 not to slide out of the positioning columns 226.
The battery core 4 comprises a winding body 46, a top cover 45, a positive pole 44, a negative pole 43, an explosion-proof valve 42 and a liquid injection port 41, wherein each battery core 4 is installed in a groove 221 of the inner tray 22, the top cover 45 of the battery core 4 and the upper edge of the groove 221 are connected and sealed through a bonding or welding process, then electrolyte is injected through the liquid injection port 41 and the liquid injection port 41 is sealed, each battery core 4 is separated in an independent sealed shell, and each battery core 4 has a charging and discharging function; since the material of the inner tray 22 has good electrical insulation, electrical insulation between each battery core 4 can be ensured.
Referring to fig. 10, 11 and 13, the inner tray 22 has a plurality of water collecting channels 227 and a plurality of heat exchanging channels 228 therein, and the cooling fluid enters the water collecting channels 227 at the water inlet side from the cooling fluid inlet 222, is further divided into the heat exchanging channels 228, and is discharged through the cooling fluid outlet 223 after being collected to the water collecting channels 227 at the water outlet side; the cooling liquid circulating in the heat exchange water channel 228 exchanges heat with the electrolyte of the battery core 4 and the winding body 46 through the wall surface of the groove 221, so that the battery core 4 is controlled to be at a proper working temperature; in the embodiment, the lower part of the heat exchange water channel 228 is in a non-closed state due to the requirement of the forming process of the inner tray 22; the inner tray 22 and the outer tray 21 are fixedly bonded by glue 215, and the lower opening of the heat exchange water channel 228 is closed by the outer tray 21 after bonding; the flange surface of the outer tray 21 is coated with the silica gel 214, and when the case cover assembly 1 is mounted on the outer tray 21, the silica gel 214 fills the gap between the case cover assembly 1 and the outer tray 21 and forms an adhesive surface so as to ensure the sealing performance of the battery pack.
Please refer to fig. 12, fig. 12 shows an exhaust path under thermal runaway condition of the battery core 4, the plurality of isolation bars 72 divide the space above the battery core into a plurality of exhaust channels, when the mixture of gas, liquid and solid is sprayed from the explosion-proof valve of the battery core 4, the insulating fireproof plate 71 above blocks the upward spraying of the three-phase mixture, the three-phase mixture flows to the gas-permeable pressure relief valve 13 on the front box cover assembly 1 along the exhaust channel between the isolation bars 72, and the gas-permeable pressure relief valve 13 opens the pressure relief channel to quickly discharge the three-phase mixture out of the box body when the pressure in the box body reaches a set pressure.
Compared with the prior art, the power battery pack has the following advantages:
(1) the battery cores are directly grouped into the power battery pack, the groove wall surface of the inner tray becomes a shell of the battery cores, the traditional conductive bars among modules are simplified into high-voltage bus bars, and meanwhile, criss-cross partition plates on the inner tray replace reinforcing beams in the box body, so that the weight of the power battery pack is remarkably reduced;
(2) the cost is reduced, the high-voltage bus, the sampling wire harness, the BMS assembly and the insulation protection assembly are integrated on the inner tray, the integration level of the system is improved, the number of parts is greatly reduced, the process links are reduced, the assembly process is simplified, and the cost of the battery pack is reduced;
(3) space utilization is high, because directly be power battery package in groups with the battery core, compressed prior art's module and arranged clearance, interior stiffening beam space, thermal management subassembly of box and arrange space, module sampling pencil and arrange space etc. more spaces can be used for arranging the battery core to arrange more batteries in the same envelope space.
(4) The assembly process is optimized, the power battery pack eliminates process links such as installation of a heat management assembly, a module, an inter-module conducting bar, a module sampling wire harness and a fixed support, and the like, and the high-voltage electrical assembly and the insulation protection assembly realize a good assembly process and are easy to realize assembly automation;
(5) the reliability is improved: this power battery package has reduced part quantity and manual assembly link, has reduced the not hard up or the installation insecure possibility of battery package part, has improved the stability of battery package.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A power battery pack is characterized by comprising a box cover assembly, a battery tray assembly, a high-voltage electrical component, a battery core body, a high-voltage busbar, a sampling wire harness, an insulation protection component, a BMS component and a pipeline;
the insulation protection component is positioned between the box cover assembly and the battery tray assembly, the battery tray assembly comprises an outer tray and an inner tray, the inner tray is fixed in the outer tray, a plurality of criss-cross partition plates are arranged on the inner tray, a plurality of grooves for containing the battery cores are formed by the plurality of partition plates in a surrounding mode, and each battery core is sealed in an independently sealed cavity;
high-voltage electrical component installs the side of interior tray, high-voltage female arranging the sampling pencil BMS unit mount insulating protection component with between the interior tray, insulating protection component with interior tray fixed connection, high-voltage female arranging be used for with the free output terminal post of electric core is connected in order to constitute required series-parallel connection form, the battery core passes through female anodal terminal and the negative terminal of arranging of high-voltage externally realize the charge-discharge, the sampling pencil respectively with the battery core with BMS unit electric connection, the pipeline is used for connecting coolant liquid interface on the interior tray with the coolant liquid interface on the outer tray.
2. The power battery pack of claim 1, wherein the case cover assembly comprises a battery case cover, a case cover connector, a venting relief valve, and a valve body connector, wherein a plurality of mounting holes for connecting with the outer tray are formed in a flange of the battery case cover, the battery case cover is mounted on the outer tray by the case cover connector, and the venting relief valve is mounted on the battery case cover through the valve body connector.
3. The power battery pack of claim 2, wherein the battery connectors are hot melt self-tapping screws.
4. The power battery pack of claim 1, wherein the insulation protection assembly comprises an insulation fireproof plate and a plurality of isolation bars, the isolation bars are made of elastomer materials, the insulation protection assembly is installed on the inner tray through a connecting piece, and in an installation state, the isolation bars are in a compressed state.
5. The power battery pack according to claim 4, wherein the insulating fireproof plate comprises a mica plate and an epoxy resin plate, the mica plate and the epoxy resin plate are integrated through gluing, and the mica plate is located at a lower layer.
6. The power battery pack according to claim 2, wherein the battery core body comprises a winding body, a top cover, a positive pole post, a negative pole post, an explosion-proof valve and a liquid injection port, the top cover and the upper edge of the groove are connected and sealed through a bonding or welding process, electrolyte is injected through the liquid injection port, and the high-voltage busbar, the positive pole post and the negative pole post form a required series-parallel connection form through laser welding to form a battery pack.
7. The power battery pack according to claim 6, wherein a coolant inlet and a coolant outlet are respectively formed at both sides of the inner tray, a plurality of water collecting channels and a plurality of heat exchange channels are formed in the inner tray, the coolant enters the water collecting channels at the water inlet side from the coolant inlet, is further distributed to the heat exchange channels, is collected in the water collecting channels at the water outlet side, and is discharged through the coolant outlet, and the coolant circulating in the heat exchange channels exchanges heat with the electrolyte of the battery core and the wound body through the wall surface of the groove.
8. The power battery pack according to claim 1, wherein the high-voltage electrical assembly comprises a negative electrical connector, a positive electrical connector, a battery power distribution unit and a high-voltage connector, positive and negative terminals of the high-voltage connector are respectively connected with corresponding terminals of the battery power distribution unit, and the BMS assembly is used for controlling on-off actions of actuators in the battery power distribution unit so as to control the conduction states of the terminals of the high-voltage connector and the negative electrical connector and the terminals of the high-voltage connector and the positive electrical connector.
9. The power battery pack according to claim 1, wherein a plurality of sampling terminals are provided on the sampling harness, the sampling terminals are connected to the high-voltage bus bar through a laser welding process, and a connector of the sampling harness is butted against a connection harness of the BMS module.
10. The power battery pack of claim 9, wherein the sampling harness is a flexible printed circuit board and the sampling terminals are nickel sheets.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922823.5A CN112072026A (en) | 2020-09-04 | 2020-09-04 | Power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010922823.5A CN112072026A (en) | 2020-09-04 | 2020-09-04 | Power battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112072026A true CN112072026A (en) | 2020-12-11 |
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ID=73666121
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010922823.5A Pending CN112072026A (en) | 2020-09-04 | 2020-09-04 | Power battery pack |
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| Country | Link |
|---|---|
| CN (1) | CN112072026A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701393A (en) * | 2020-12-29 | 2021-04-23 | 长城汽车股份有限公司 | Battery module and have its vehicle |
| CN114084227A (en) * | 2021-11-24 | 2022-02-25 | 奇瑞汽车股份有限公司 | Electric automobile frame and electric automobile |
| CN114374036A (en) * | 2021-11-23 | 2022-04-19 | 华为技术有限公司 | Battery package and thermal runaway protector of electric core subassembly |
| CN116487771A (en) * | 2023-06-20 | 2023-07-25 | 江铃汽车股份有限公司 | Power battery, cooling device and assembly method thereof and electric automobile |
| WO2023185404A1 (en) * | 2022-03-28 | 2023-10-05 | 东莞新能安科技有限公司 | Circuit board assembly, battery and electric apparatus |
-
2020
- 2020-09-04 CN CN202010922823.5A patent/CN112072026A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112701393A (en) * | 2020-12-29 | 2021-04-23 | 长城汽车股份有限公司 | Battery module and have its vehicle |
| CN112701393B (en) * | 2020-12-29 | 2023-06-09 | 长城汽车股份有限公司 | Battery module and vehicle with same |
| CN114374036A (en) * | 2021-11-23 | 2022-04-19 | 华为技术有限公司 | Battery package and thermal runaway protector of electric core subassembly |
| CN114084227A (en) * | 2021-11-24 | 2022-02-25 | 奇瑞汽车股份有限公司 | Electric automobile frame and electric automobile |
| WO2023185404A1 (en) * | 2022-03-28 | 2023-10-05 | 东莞新能安科技有限公司 | Circuit board assembly, battery and electric apparatus |
| CN116487771A (en) * | 2023-06-20 | 2023-07-25 | 江铃汽车股份有限公司 | Power battery, cooling device and assembly method thereof and electric automobile |
| CN116487771B (en) * | 2023-06-20 | 2023-09-12 | 江铃汽车股份有限公司 | Power battery, cooling device and assembly method thereof and electric automobile |
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