CN112397828B - Soft package non-module power battery system - Google Patents
Soft package non-module power battery system Download PDFInfo
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- CN112397828B CN112397828B CN202010755286.XA CN202010755286A CN112397828B CN 112397828 B CN112397828 B CN 112397828B CN 202010755286 A CN202010755286 A CN 202010755286A CN 112397828 B CN112397828 B CN 112397828B
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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
- H01M10/65—Means for temperature control structurally associated with the cells
- H01M10/653—Means for temperature control structurally associated with the cells characterised by electrically insulating or thermally conductive materials
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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
- 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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- 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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Abstract
The invention discloses a soft-package non-module power battery system which comprises an upper cover and a lower box body assembly which are fixedly connected, wherein a battery management system, a pressure lever assembly, a low-voltage wire harness, a soft-package electric core assembly, a high-voltage electric assembly, a cross beam assembly and a liquid cooling system are sequentially arranged between the upper cover and the lower box body assembly from top to bottom. The technical scheme has no modular structure, the soft-packaged battery cell is directly integrated into the battery box, the process of integrating the battery cell into the module is omitted, the assembly error caused by the integration in the middle of the module is omitted, the process is simplified, and the cost is reduced; the module is not formed, materials such as a module shell, a module end plate and heat conducting structural adhesive are omitted, the weight is obviously reduced, the cost is obviously reduced, a heat exchange path is changed into a battery cell-heat conducting structural adhesive-liquid cooling pipe, a heat transfer path is shortened, and the efficiency is improved.
Description
Technical Field
The invention relates to the field of power batteries, in particular to a soft-package non-modular power battery system.
Background
The soft package battery is a lithium battery with a shell made of a soft packaging material, usually an aluminum-plastic composite film, has the obvious advantages of large capacity, small internal resistance, flexible design, high safety, light weight and the like, and is applied to the field of power batteries at an accelerated speed. The soft package battery core is favored by the manufacturers of the power batteries by virtue of the advantages of good safety performance, light weight, flexible design and the like. Therefore, the soft package battery cell is used more and more in new energy automobiles and energy storage. The component structure of current soft packet of power battery system is generally by electric core level to module level, from module level to battery box structure, and soft packet of power battery physique is soft, and is difficult for fixing, and easily produces mar and pit scheduling problem, therefore soft packet of power battery's fixed and connection become the focus of trade development.
The prior scheme integrates the module earlier, assembles the module to the battery box the inside again, to electric core through twice integrated technology, compares no module ization scheme, increases module structure spare material, and the technology is more complicated, and weight is heavier, and the cost is higher, has increased electric core to the distance of liquid cooling system heat exchange interface simultaneously.
The heat exchange plate of the existing scheme mainly comprises aluminum extruded section bar tailor welding, stamping plate brazing and an aluminum extruded harmonica tube, and the three types of the heat exchange plates have different problems, such as heavier weight, large occupied space, too simple flow channel to influence heat dissipation, complex welding process, complex assembly structure, leakage risk of an interface plug-in unit, poor temperature equalization of unidirectional liquid flow and the like.
The existing scheme of the liquid cooling plate mainly comprising the coiled pipe is not effectively fused with the battery box body, and a limiting or supporting structure is also added to form space waste; the coil pipe has limited heat exchange area due to process factors, and is directly attached to the module to use the heat exchange efficiency is not high; the existing scheme has the disadvantages that the design of a liquid cooling system is complex, the number of interface plug-ins is large, the liquid leakage risk is increased, and the system integration level is low; the existing scheme adopts one end to feed liquid and the other end to discharge liquid, liquid flows in a single direction to dissipate heat, the temperature difference between a liquid inlet end electric core and the liquid is large, the heat exchange is fast, the temperature difference between a liquid outlet end electric core and the liquid is small, the heat exchange is slow, and the temperature balance is poor.
The buffer chamber is not reserved in the design of the prior art, a large amount of gas can be generated after a single electric core is subjected to a safety accident, if the gas cannot rapidly enter the explosion-proof valve through the buffer chamber, a chain reaction can occur, and the risk of explosion exists. The prior art scheme is not ideal for physical isolation or isolation effect in the design structure near the battery box internal cell pressure release valve, and electrolyte and melt can be sprayed out after a single battery cell has a safety accident, and chain reaction is caused by directly spraying to nearby battery cells, so that the risk of explosion is caused. And meanwhile, the electric core, the high-voltage electric device and the low-voltage acquisition wire harness are not physically isolated, and when one of the electric core, the high-voltage electric device and the low-voltage acquisition wire harness is in an accident, the electric core, the high-voltage electric device and the low-voltage acquisition wire harness are easily diffused to other parts. The prior art scheme does not design guiding gutter or reservoir, can spout electrolyte and fuse after the incident takes place for single electric core, and chain reaction takes place for other electric cores department that high temperature electrolyte and fuse can flow, has the risk of explosion.
Most of the existing schemes in the market integrate the battery cell into a module, and then assemble the module on a PACK, at present, researches on non-modular design of a square aluminum shell battery cell are more, and no design scheme of a soft-package battery cell non-modular power battery system is provided.
Chinese patent document CN107671414A discloses a "soft package power battery system structure without module structure". Adopt a plurality of electric core groups respectively directly through the bolt fastening in on the box, electric core group is including piling up at least one electric core that sets up, and quantity is adjusted according to box height and demand, just be provided with first fixed orifices on electric core group, be provided with the second fixed orifices at the bottom half, for further fixed evenly paint the structure and glue between electric core and the electric core, between electric core and the box. The battery manufactured by the technical scheme has heavy weight, is not provided with physical isolation, and has potential safety hazard.
Disclosure of Invention
The invention mainly solves the technical problems that the original battery pack is heavy in weight, not compact in design and has potential safety hazards, and provides a soft-packaged non-modular power battery system which has no modular structure, wherein a soft-packaged battery cell is directly integrated into a battery box, so that the process of integrating the battery cell into a module is omitted, the assembly error caused by integration in the middle of the module is omitted, the process is simplified, and the cost is reduced; the module is not formed, materials such as a module shell, a module end plate and heat conducting structural adhesive are omitted, the weight is obviously reduced, the cost is obviously reduced, a heat exchange path is changed into a battery cell-heat conducting structural adhesive-liquid cooling pipe, a heat transfer path is shortened, and the efficiency is improved.
The technical problem of the invention is mainly solved by the following technical scheme: the battery box comprises an upper cover and a lower box body assembly which are fixedly connected, wherein a battery management system, a pressure lever assembly, a low-voltage wire harness, a soft package electric core assembly, a high-voltage electric assembly, a cross beam assembly and a liquid cooling system are sequentially arranged between the upper cover and the lower box body assembly from top to bottom. The upper cover and the lower box body assembly are fixedly connected to form a cavity, the battery management system and the low-voltage wire harness are installed on the pressure bar assembly, the soft-package electric core assembly and the high-voltage electric assembly are installed on the beam assembly, and the liquid cooling system is installed on the lower box body assembly.
Preferably, the upper cover is provided with a flange plate fixing hole matched with the lower box body assembly and an upper cover fixing hole matched with the pressure rod assembly, and the upper cover is made of a stamping aluminum plate forming or continuous glass fiber composite material.
Preferably, the compression bar assembly comprises a compression bar and an elastic body, an upper cover matching hole matched with the upper cover fixing hole is formed in the compression bar, and a compression bar fixing hole is formed in the middle of the compression bar. The pressure bar is made of high-strength steel, so that the degree of freedom of the positive Z direction of the battery cell is limited, and the elastic body can be compressed and deformed to play a buffering role.
Preferably, battery management system set up on the depression bar, be equipped with the isolation between battery management system and laminate polymer core subassembly, the high-tension electricity subassembly. The specific form of the battery management system is not limited, and the pressure lever is arranged in an overhead manner, so that the battery management system is isolated and used for preventing a part of the battery management system from being rapidly diffused to other parts when an accident happens, and the safety is improved.
As preferred, soft-packaged battery group spare including divide into about a plurality of electric cores of two rows, the utmost point ear series-parallel connection welding of electric core forms the electric core group, electric core top is equipped with the fire prevention and fills up, controls to be equipped with T type guard plate between two rows of electric cores, the electric core group is connected through the high-pressure connecting row, insulating lid is installed to high-pressure connecting row top. Two rows of electric cores are kept apart and form two cavitys with electric core to T type guard plate, and T type guard plate is unsmooth grid structure, has the effect of preventing splashing to T type guard plate is equipped with the air vent and is convenient for dispel the heat.
Preferably, the beam assembly comprises a plurality of beams and heat insulation materials, beam fixing holes are formed in the beams, and a battery cell side bottom baffle is arranged at the lower edge of each beam. The crossbeam is preferably a cavity pipe formed by aluminum extrusion, the side surface in contact with the battery cell is coated or pasted with a thermal insulation material, the total number of the three crossbeams is three, and the battery cell in the battery box is separated into 6 independent areas by matching with the T-shaped protection plate.
Preferably, the liquid cooling system comprises a coiled pipe, a collecting pipe and a water gap joint assembly which are connected in a welding mode, and the water gap joint assembly comprises a flange plate, a fixing structure, a limiting structure and a sealing material; a group of two coiled pipes with opposite liquid flow directions are arranged below each row of battery cores, the water inlet ends of the two coiled pipes are connected with the same collecting pipe, the water outlet end of each coiled pipe is connected with the other collecting pipe, each collecting pipe corresponds to one water gap joint assembly, and the water gap joint assemblies penetrate through the side wall of the battery box body and are fixed on the side wall.
Preferably, the lower box assembly comprises a battery box body and a flange edge, a sealing material is filled in a groove of the flange edge, an explosion-proof valve is arranged on the side wall of the front portion of the battery box body, a water gap joint assembly fixing hole for fixing the water gap joint assembly is formed in the side wall of the front portion of the battery box body, a liquid storage tank at the bottom of the battery box body, a beam fixing point and a liquid cooling plate placing groove are formed in the bottom of the battery box body, and a plurality of concave-convex grid structures are arranged on the side wall of the battery box body. The flange edge groove is filled with sealing materials which are matched with the flange edge to play a role in sealing the box body. The liquid storage tank at the bottom of the box is slightly larger than the thickness of the liquid cooling pipe in depth, so that the part of the convex groove of the liquid cooling pipe is crushed by the electric core when the assembly is caused by the manufacturing error, and the design of wall thickness such as the concave-convex groove not only reduces the weight, but also enhances the structure. The concave-convex grid structure prevents the electrolyte or the melt from sputtering and guiding to the liquid storage tank.
Preferably, the low-voltage wiring harness is arranged above the soft electric core assembly.
Preferably, the high-voltage electrical system comprises a relay, a fuse and a shunt. The high-voltage power supply also comprises other high-voltage components and parts, and can be integrated into an integrated scheme.
The invention has the beneficial effects that:
1. the invention has no modular structure, and the soft package battery cell is directly integrated into the battery box. Firstly, the process of integrating the battery cell into the module is omitted, the assembly error caused by the integration in the middle of the module is omitted, the process is simplified, and the cost is reduced; secondly, no module is adopted, materials such as a module shell, a module end plate, heat-conducting structural adhesive and the like are omitted, the weight is obviously reduced, the cost is obviously reduced, and the energy density of the system exceeds 210Wh/kg; the third is that the original heat exchange path: the cell-heat-conducting structural adhesive-module shell-heat-conducting adhesive-liquid cooling pipe is changed into the current heat exchange path: the battery core, the heat-conducting structural adhesive and the liquid cooling pipe are short in heat transfer path and high in efficiency.
2. The invention relates to a liquid cooling system structure. Firstly, a coiled pipe is adopted, the wall thickness is only 0.8-1mm, the coiled pipe is completely contacted with cooling liquid, no redundant corner is formed, and the weight of the coiled pipe is 80%, 60% and 35% lighter than that of an extrusion plate, a stamping plate and a harmonica pipe respectively; the second liquid cooling system is high in integration level, a coiled pipe is welded with a collecting pipe, the collecting pipe is welded with a water inlet and a water outlet, and then the collecting pipe is fixed on the box body and connected to the outside of the battery pack. The whole battery pack is not connected with one plug-in unit, so that the whole liquid cooling system is simplified, and compared with the existing scheme, the possibility of liquid leakage at the plug-in unit connection position is greatly reduced; the third liquid cooling system adopts a four-inlet four-outlet parallel design, and has the innovation point that the one-inlet one-outlet and the other-inlet one-outlet reverse design are correspondingly arranged below one module, the water outlet of one runner is close to the water inlet of the other runner to form a bidirectional runner, so that the problems of overlarge temperature difference between the water inlet end and the water outlet end of the unidirectional runner and poor battery core temperature balance are solved.
3. The invention discloses a fusion structure of a liquid cooling system and a lower box body. According to the second scheme, the coiled pipe is 4mm in thickness and is embedded into the groove of the cast aluminum box body, the concave-convex design of the lower box body not only improves the strength of the box body, but also plays a role in limiting the liquid cooling plate and reducing the liquid cooling plate supporting structure, the height of the whole battery box is reduced by 15-20mm compared with a stamping plate scheme or a harmonica pipe scheme with elastic support, and the space is saved by 10% -15%.
4. According to the design of the gas expansion buffer cavity and the pressure relief channel in the battery pack, when a single battery cell is out of control due to heat, a large amount of generated gas is properly reduced in pressure through the buffer cavity, then passes through the pressure relief channel and is finally discharged through the explosion-proof valve, and the explosion risk caused by overlarge instantaneous pressure in the box body is avoided. The middle channel of the battery box is composed of a T-shaped plate and holes which are designed on the plate and are used for ventilating and not communicating liquid, and gas can be smoothly discharged into the upper part from the middle channel.
5. The physically isolated T-shaped protection plate in the battery pack not only has the function of preventing short circuit, but also has the function of preventing heat diffusion. The protection plate is arranged on a designed voltage relief surface or a weak and easy voltage relief surface of the battery core, the concave-convex grid structure is designed on the side surface to prevent the electrolyte sprayed out of the battery core from sputtering everywhere, and the concave-convex grid structure has a flow guiding effect and guides the electrolyte or the melt sprayed out of the surface of the concave-convex grid structure into a bottom liquid storage tank. The cross section of the concave-convex grating structure is not limited to a triangle, a semicircle, a strip and the like, and has the function of preventing liquid objects from sputtering.
6. The liquid storage tank structure in the battery pack stores high-temperature liquid flowing out of the battery core and prevents thermal runaway caused by diffusion of the high-temperature liquid. After a single soft-packaged battery cell has a safety accident, the tab of the battery cell can be preferentially decompressed and sprayed with electrolyte and melt, one side of the battery cell is sprayed onto the protection plate and then enters the liquid storage tank through the flow guide of the concave-convex grid structure, and the other side of the battery cell is sprayed onto the side wall of the lower box body and then enters the liquid storage tank through the flow guide of the concave-convex grid structure.
7. The battery core, the high-voltage electric device, the high-voltage connecting bar, the battery management system and the low-voltage acquisition wire harness are all designed in an independent physical isolation mode, so that one part of the battery core, the high-voltage electric device, the high-voltage connecting bar, the battery management system and the low-voltage acquisition wire harness are prevented from being rapidly diffused to other parts when accidents happen, and the safety is greatly improved compared with the existing scheme. The T-shaped protection plate isolates the electric core from the high-voltage connecting row, the insulating cover isolates the high-voltage connecting row from the low-voltage acquisition wiring harness, the structural beam isolates the high-voltage electric device from the electric core, and the fireproof heat-insulating layer isolates the battery management system from the electric core and the like.
Drawings
Fig. 1 is an exploded view of the present invention.
FIG. 2 is a perspective view of the strut assembly of the present invention.
Figure 3 is an exploded view of the soft-packed battery core assembly of the present invention.
Fig. 4 is a perspective view of the cross-beam assembly of the present invention.
Fig. 5 is a perspective view of a liquid cooling system of the present invention.
Fig. 6 is a perspective view of the lower housing assembly of the present invention.
Fig. 7 is a cross-sectional view of the lower case of the present invention engaged with a liquid-cooled tube.
In the figure, 1 upper cover, 2 compression bar components, 2.1 compression bar, 2.2 elastic body, 2.3 upper cover matching hole, 2.4 compression bar fixing hole, 3 battery management system, 4 low-voltage wire harness, 5 soft package battery assembly, 5.1 insulating cover, 5.2 high-voltage connecting row, 5.3T-shaped protection plate, 5.4 fireproof pad, 5.5 battery cell, 6 beam component, 6.1 beam, 6.2 heat insulating material, 6.3 beam fixing hole, 6.4 battery cell side bottom baffle, 7 high-voltage electric device, 8 liquid cooling system, 8.1 serpentine tube, 8.2 collecting pipe, 8.3 water gap joint component, 9 lower box component, 9.1 flange edge, 9.2 sealing material, 9.3 explosion-proof valve, 9.4 water gap joint component fixing hole, 9.5 box bottom liquid storage tank, 9.6 beam fixing point, 9.7 liquid cooling plate placing groove and 9.8 concave-convex grid structure.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b): the soft-package modularized-free power battery system of the embodiment comprises an upper cover 1 and a lower box assembly 9 which are fixedly connected, wherein the upper cover and the lower box assembly are fixedly connected to form a cavity, as shown in fig. 1. And a compression bar assembly 2, a low-voltage wire harness 4 and a cross beam assembly 6 are sequentially arranged between the upper cover 1 and the lower box body assembly 9 from top to bottom. Battery management system and low pressure pencil are installed on the depression bar subassembly, and laminate polymer core subassembly and high-tension electricity subassembly are installed on beam assembly, and the liquid cooling system mount is on box subassembly down. Battery management system 3 sets up on depression bar 2.1, is equipped with the isolation between battery management system 3 and laminate polymer battery core subassembly 5, the high-tension electricity subassembly 7. The specific form of the battery management system is not limited, and the pressure lever is arranged in an overhead manner, so that the battery management system is isolated and used for preventing a part of the battery management system from being rapidly diffused to other parts when an accident happens, and the safety is improved.
The upper cover 1 is provided with a flange plate fixing hole matched with the lower box body component 2 and an upper cover fixing hole matched with the pressure rod component 2, and the material is formed by punching an aluminum plate or continuous glass fiber composite material. The high-voltage electrical system 7 comprises relays, fuses and shunts. The low-voltage wire harness 4 is arranged above the soft package electric core component 5
As shown in fig. 2, the pressure lever assembly 2 includes a pressure lever 2.1 and an elastic body 2.2, the pressure lever 2.1 is provided with an upper cover fitting hole 2.3 fitting with the upper cover fixing hole, and the middle of the pressure lever 2.1 is provided with a pressure lever fixing hole 2.4. The pressure bar is made of high-strength steel, so that the degree of freedom of the positive Z direction of the battery cell is limited, and the elastic body can be compressed and deformed to play a buffering role.
As shown in fig. 3, the soft-packaged battery assembly 5 includes a plurality of battery cells 5.5 divided into left and right rows, the tabs of the battery cells 5.5 are welded in series and parallel to form a battery cell assembly, and a fireproof pad 5.4 is arranged above the battery cells 5.5. A T-shaped protection plate 5.3 is arranged between the left row of electric cores and the right row of electric cores 5.5, the T-shaped protection plate isolates the two rows of electric cores and forms two cavities with the electric cores, the T-shaped protection plate is of a concave-convex grid structure and has the function of sputtering prevention, and the T-shaped protection plate is provided with an air vent to facilitate heat dissipation. The electric core group is connected through high-voltage connection row 5.2, insulating cover 5.1 is installed to high-voltage connection row 5.2 top.
As shown in fig. 4, the beam assembly 6 includes a plurality of beams 6.1 and a heat insulating material 6.2, beam fixing holes 6.3 are provided on the beams 6.1, and a cell side bottom baffle 6.4 is provided at the lower edge of the beams 6.1. The crossbeam is preferably a cavity pipe formed by aluminum extrusion, the side surface in contact with the battery cell is coated or pasted with a thermal insulation material, the total number of the three crossbeams is three, and the battery cell in the battery box is separated into 6 independent areas by matching with the T-shaped protection plate.
As shown in fig. 5, the liquid cooling system 8 includes a serpentine pipe 8.1, a collecting pipe 8.2 and a nozzle joint assembly 8.3, which are connected by welding, and the nozzle joint assembly 8.3 includes a flange, a fixing structure, a limiting structure and a sealing material; a group of two serpentine tubes 8.1 with opposite liquid flow directions are arranged below each row of the battery cores 5.5, water inlet ends of the two serpentine tubes 8.1 are connected with the same collecting tube 8.2, a water outlet end of the serpentine tube 8.1 is connected with the other collecting tube 8.2, each collecting tube 8.2 corresponds to one water gap connector assembly 8.3, and the water gap connector assemblies 8.3 penetrate through the side wall of the battery box body and are fixed on the side wall.
As shown in fig. 6 and 7, the lower box assembly 9 comprises a battery box body and a flange 9.1, a sealing material 9.2 is filled in a groove of the flange 9.1, an explosion-proof valve 9.3 is arranged on the side wall of the front part of the battery box body, a water gap joint assembly fixing hole 9.4 for fixing a water gap joint assembly 8.3 is arranged on the side wall of the front part of the battery box body, and a box bottom liquid storage tank 9.5, a beam fixing point 9.6 and a liquid cooling plate placing tank 9.7 are arranged at the bottom of the battery box body. The side wall of the battery box body is provided with a plurality of concave-convex grid structures 9.8 which prevent electrolyte or fusant from sputtering and guide to the liquid storage tank. The liquid storage tank at the bottom of the box is slightly larger than the thickness of the liquid cooling pipe in depth, so that the part of the convex groove of the liquid cooling pipe is crushed by the electric core when the assembly is caused by the manufacturing error, and the design of wall thickness such as the concave-convex groove not only reduces the weight, but also enhances the structure.
During the use, lower box subassembly 9 is kept flat, places filler material in the recess, installation liquid cooling system 8, and liquid cooling pipe upper surface and the protruding surface parallel and level of lower bottom of the case portion this moment, then tiling filler material. The filling material is generally a material with heat conduction performance, and the filling material can be a heat conduction pad, a heat conduction glue, a heat insulation pad, a cushion pad and the like according to specific requirements. Place soft packet of electric core subassembly 5 to fixed position, install beam assembly 6, then install depression bar assembly 2. Then, the battery management system 3, the low-voltage wiring harness 4 and the high-voltage component 7 can be respectively installed at the same time, and finally the upper cover 1 is installed.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the terms compression rod, lower tank, liquid cooling system, etc. are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (7)
1. The utility model provides a soft packet of no modularization power battery system, its characterized in that, including fixed connection's upper cover (1) and lower box subassembly (9), be equipped with battery management system (3), depression bar subassembly (2), low pressure pencil (4), soft packet of battery core subassembly (5), high-tension electricity subassembly (7), crossbeam subassembly (6) and liquid cooling system (8) from top to bottom between upper cover (1) and lower box subassembly (9) in proper order, soft packet of battery core subassembly (5) is including being divided into a plurality of electric cores (5.5) of two rows about, the utmost point ear cluster parallel connection welding of electric core (5.5) forms the electric core group, electric core (5.5) top is equipped with fire prevention pad (5.4), is equipped with T type guard plate (5.3) between two rows of electric cores (5.5) of left and right sides, the electric core group passes through high-pressure run-on bank (5.2) and connects, insulating cover (5.1) are installed to high-pressure run-on top, liquid cooling system (8) includes welded connection's coiled pipe (8.1), coiled pipe (8.2) and mouth joint subassembly (8.3), spacing joint structure, including spacing joint structure; every row of electricity core (5.5) below is equipped with a set ofly and is two fluid flow opposite's coiled pipe (8.1) promptly, and the water inlet end of these two coiled pipes (8.1) is connected same root collecting pipe (8.2), and the delivery port end of coiled pipe (8.1) is connected another collecting pipe (8.2), and every collecting pipe (8.2) correspond a mouth of a river joint subassembly (8.3), and mouth of a river joint subassembly (8.3) pass the battery box lateral wall and fix on the lateral wall, box subassembly (9) include battery box and flange limit (9.1) down, flange limit (9.1) recess intussuseption is filled with sealing material (9.2), is equipped with explosion-proof valve (9.3) on the anterior lateral wall of battery box, is equipped with mouth of a river joint subassembly fixed orifices (9.4) that are used for fixed joint subassembly (8.3) on the anterior lateral wall of battery box, and battery box bottom is equipped with reservoir bottom (9.5), crossbeam fixed point (9.6) and liquid cooling board standing groove (9.7), is equipped with a plurality of unsmooth grid structure (9.8.8).
2. The soft-package module-free power battery system according to claim 1, wherein the upper cover (1) is provided with flange fixing holes matched with the lower box body assembly (2) and upper cover fixing holes matched with the pressure lever assembly (2), and the material is formed by punching an aluminum plate or continuous glass fiber composite materials.
3. The soft-package modularized power battery system according to claim 2, wherein the compression bar assembly (2) comprises a compression bar (2.1) and an elastic body (2.2), an upper cover matching hole (2.3) matched with the upper cover fixing hole is formed in the compression bar (2.1), and a compression bar fixing hole (2.4) is formed in the middle of the compression bar (2.1).
4. The modular power battery system of claim 3, wherein the battery management system (3) is arranged on the compression bar (2.1), and isolation is provided between the battery management system (3) and the soft-package battery core assembly (5) and the high-voltage electric assembly (7).
5. The soft-package modular-free power battery system according to claim 1, characterized in that the beam assembly (6) comprises a plurality of beams (6.1) and heat insulating materials (6.2), beam fixing holes (6.3) are formed in the beams (6.1), and a cell side bottom baffle (6.4) is arranged at the lower edge of the beams (6.1).
6. The modular power battery system according to claim 1, characterized in that the low voltage wiring harness (4) is arranged above the soft-pack battery assembly (5).
7. The flexible-package modularity power battery system according to claim 1, characterized in that said high-voltage electrical system (7) comprises relays, fuses and shunts.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113113713B (en) * | 2021-04-08 | 2022-07-08 | 中国第一汽车股份有限公司 | Power battery assembly and vehicle |
| CN113451698A (en) * | 2021-07-23 | 2021-09-28 | 湖北亿纬动力有限公司 | CTP battery package and car |
| CN114552053B (en) * | 2021-09-08 | 2023-09-05 | 万向一二三股份公司 | High-integration battery pack |
| CN114388968A (en) * | 2021-12-31 | 2022-04-22 | 上海捷新动力电池***有限公司 | Non-module battery pack integration device adopting soft package battery core |
| CN115117540B (en) * | 2022-06-27 | 2023-04-14 | 楚能新能源股份有限公司 | Pack box structure |
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