CN112490577A - Battery pack with replaceable battery core - Google Patents
Battery pack with replaceable battery core Download PDFInfo
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- CN112490577A CN112490577A CN202011412499.9A CN202011412499A CN112490577A CN 112490577 A CN112490577 A CN 112490577A CN 202011412499 A CN202011412499 A CN 202011412499A CN 112490577 A CN112490577 A CN 112490577A
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- battery pack
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- voltage
- shell
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- 238000001816 cooling Methods 0.000 claims description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 19
- 238000003466 welding Methods 0.000 claims description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 11
- 229910052782 aluminium Inorganic materials 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 9
- 230000001070 adhesive effect Effects 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 239000003292 glue Substances 0.000 claims description 8
- 238000005452 bending Methods 0.000 claims description 4
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 125000006850 spacer group Chemical group 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 16
- 238000012423 maintenance Methods 0.000 description 14
- 238000000034 method Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000001066 destructive effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/64—Constructional details of batteries specially adapted for electric vehicles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L50/00—Electric propulsion with power supplied within the vehicle
- B60L50/50—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells
- B60L50/60—Electric propulsion with power supplied within the vehicle using propulsion power supplied by batteries or fuel cells using power supplied by batteries
- B60L50/66—Arrangements of batteries
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the technical field of new energy automobiles, in particular to a battery pack with a replaceable battery core. The invention provides a battery pack with a replaceable battery core, which comprises a battery core module and a battery pack shell, wherein the battery core module comprises: the battery cell module comprises a plurality of battery cells, an electric appliance connecting box and a battery management system, and is formed by area division, wherein a high-voltage connecting position and a low-voltage connecting position of the battery cells are arranged at the bottom of the battery pack in a quick-plug high-voltage connecting mode; the lower part of the battery pack shell is of a detachable structure. According to the CTP battery pack with the replaceable battery core, when the battery core in the CTP battery pack is in a problem, the position of the battery core in the problem can be confirmed through the BMS, the position of the battery core module to be replaced is determined, the replacement operation of the battery core module is carried out, the operation flow that the battery pack is detached from a vehicle can be omitted, the detachment and installation can be completed on a vehicle body, and the efficiency is higher.
Description
Technical Field
The invention relates to the technical field of new energy automobiles, in particular to a battery pack with a replaceable battery core.
Background
As an environmentally friendly and energy-saving alternative to conventional internal combustion vehicles, the position of pure electric vehicles is becoming increasingly important. In order to provide electric energy for operating the electric motor, the electric vehicle has a rechargeable battery pack, and an effective travel distance of the electric vehicle is proportional to a capacity of the battery pack.
Because the structural space of the electric vehicle for the battery pack is limited, the capacity of the battery pack is increased by improving the energy density of the battery pack and maximizing the utilization of the space of the battery pack, so that the battery pack can carry more energy to improve the driving mileage of the electric vehicle.
With the development of new energy industry, the size of a battery module is changed from VDA (v tape der automotive industry association, germany) to a larger 590 module, and the size and capacity of a battery cell are continuously increased.
At present, battery Pack schemes such as a CTP (Cell To Pack, module-free power battery Pack) battery Pack and a blade battery are available. Because the CTP battery package scheme can use the battery package space to the at utmost, reduces the use of battery package structure and module structure, promotes the usage space of electric core for the volume production cost of battery package reduces, and battery package energy density promotes. Therefore, the CTP battery pack scheme is widely accepted by various large battery factories and host factories as a development direction of future batteries and battery packs.
The CTP battery package scheme has reduced the use of battery package structure, module structure and mounting, for the joint strength who guarantees electric core and battery package, current processing scheme is that the structure is introduced in a large number and glues, the heat conduction structure glues and the fixed of electric core bandage mode such as guarantee electric core, and does not adopt the mechanical connection mode of this kind of detachable mode of similar bolted connection, and its reason mainly has following three points:
1) the battery core with the mechanical connecting surface has low manufacturability and high cost;
2) inevitably, a similar thermal conductive glue or crack filler (Gapfiller) is still needed to improve the thermal conductivity of the cell to the thermal management system;
3) the large-size capacity battery cell causes that the connection strength cannot be guaranteed, a large amount of space needs to be occupied in the battery pack, and the more the battery cells are, the larger the bolt consumption is.
Structural adhesive and heat conduction structural adhesive are used in a large number in the CTP battery pack, when the battery core of the CTP battery pack has problems and needs to be replaced, the sol agent and high-temperature treatment need to be added, and the problem battery core connected with the battery pack can be detached only in a long time.
At present, the sol agent has higher cost, a matched sol agent scheme is not adopted, and the high temperature also has a destructive effect on the battery, so that the repair process has high difficulty, long time consumption and high cost, and the irreversible influence is caused on the battery core.
Due to the reasons, the maintainability problem of the CTP battery pack is obvious, and the battery cores adopted by the CTP battery pack are all battery cores with larger sizes and capacities.
Different from the conventional VDA-sized battery core, the battery core adopted by most CTP battery pack schemes is a battery core with larger thickness or longer length (blade battery), the problems of consistency and dimensional tolerance of the battery core are lower than those of the VDA-sized battery core in the production link of the battery core, the cost is higher, and the maintainability of the CTP battery pack is poorer, so that in the installation of the battery pack, if one battery core has a problem, the whole CTP battery pack must be scrapped or needs considerable time and cost for disassembly, replacement and maintenance.
If the battery package has appeared the problem in the use, the CTP battery package can't adopt the module in the present stage to carry out the quick replacement mode equally, leads to maintenance duration long, and the maintenance degree of difficulty is big, a great deal of problems such as cost of maintenance height.
Disclosure of Invention
The invention aims to provide a battery pack with a replaceable battery core, which solves the problem that the battery core module of the CTP battery pack in the prior art is difficult to independently and rapidly replace.
In order to achieve the above object, the present invention provides a battery pack with replaceable battery cells, including a battery cell module and a battery pack case:
the battery cell module comprises a plurality of battery cells, an electric appliance connecting box and a battery management system, and is formed by area division, wherein a high-voltage connecting position and a low-voltage connecting position of the battery cells are arranged at the bottom of the battery pack in a quick-plug high-voltage connecting mode;
the lower part of the battery pack shell is of a detachable structure.
In one embodiment, the electric cores are arranged at a preset interval by taking a certain number as a unit, and a positioning spacer is added in the middle to form an electric core module.
In one embodiment, the cell modules include a high-voltage connection flat cable and a cross-stringer high-voltage connection flat cable, and the cell modules at all positions are replaced by realizing high-voltage connection from the bottom of the battery pack;
the high-voltage connecting flat cable is a high-voltage connecting aluminum row which is connected with two ends between the battery modules;
the cross-longitudinal-beam high-voltage connection flat cable is a high-voltage connection aluminum row which crosses the longitudinal beam and is connected with two ends between the battery modules.
In an embodiment, the battery cells of the battery module are connected to each other at high voltage by an inter-cell high-voltage connection flat cable, and the inter-cell high-voltage connection flat cable is an aluminum row for high-voltage connection between the battery cells of the battery module.
In one embodiment, the cell modules are connected with each other by a high-voltage output connector for fast-plug high-voltage connection, and the output side of the cell modules is provided with the high-voltage output connector.
In one embodiment, the battery pack shell comprises a water-cooling plate upper cover, and the water-cooling plate and the battery pack upper cover are combined and connected to form the battery pack shell.
In one embodiment, the top of the battery cell is connected and combined with the upper cover of the water cooling plate by crack filling materials.
In an embodiment, the cell module further includes a cell module support plate, which is connected to the bottom of the cell and bonded by a structural adhesive:
glue overflow openings are reserved in the four directions of the bottom of the battery cell module supporting plate, and bending structures are arranged on the two sides of the battery cell module supporting plate to provide clamping force for a battery cell;
the battery cell supporting plate is connected with the battery pack shell in a bolt connection mode, and the whole battery cell module is fixed with the battery pack shell.
In one embodiment, the battery pack case further comprises a battery pack case transverse frame, a battery pack case longitudinal frame and a longitudinal beam:
the transverse frame of the battery pack shell, the longitudinal frame of the battery pack shell and the longitudinal beam are hermetically connected in a welding mode to form a whole bearing structure of the battery pack;
the transverse frame of the battery pack shell, the longitudinal frame of the battery pack shell and the upper cover of the water cooling plate are connected in a laser welding mode.
In one embodiment, a square notch is formed in the front side of the corresponding X axis of the transverse frame of the battery pack shell and serves as a mounting interface position of a high/low voltage output connector and an explosion-proof valve of the battery pack;
a circular hole is formed in the transverse frame of the battery pack shell and on the back side of the corresponding X axis to serve as a water-cooling pipe interface;
the water cooling pipe is output through a water cooling pipe interface, and a sealing ring is arranged at the interface part of the water cooling pipe and the water cooling pipe.
In one embodiment, the battery pack shell further comprises a bottom protection plate, wherein a cavity is formed by aluminum alloy extrusion, and the bottom protection plate is connected with the transverse frame and the longitudinal frame of the battery pack shell through the sealing ring matched with the lower shell groove to seal the battery pack shell.
In one embodiment, the distance between the battery cell module and the battery pack shell is 15-20 mm.
According to the CTP battery pack with the replaceable battery core, when the battery core in the CTP battery pack is in a problem, the position of the battery core in the problem can be confirmed through the BMS, the position of the battery core module to be replaced is determined, the replacement operation of the battery core module is carried out, the operation flow that the battery pack is detached from a vehicle can be omitted, the detachment and installation can be completed on a vehicle body, and the efficiency is higher.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings in which like reference numerals denote like features throughout the several views, wherein:
fig. 1 discloses an installation diagram of a replaceable-cell battery pack according to an embodiment of the present invention;
fig. 2 discloses an exploded view of a part of a replaceable-cell battery pack according to an embodiment of the present invention;
fig. 3 discloses an internal space layout diagram of a replaceable-cell battery pack according to an embodiment of the invention;
fig. 4 discloses a high voltage connection diagram of a replaceable-cell battery pack according to an embodiment of the invention;
fig. 5 discloses a structural diagram of a cell module of a replaceable-cell battery pack according to an embodiment of the invention;
fig. 6 discloses a battery can housing structure diagram of a replaceable cell according to an embodiment of the invention;
fig. 7 discloses a schematic diagram of a longitudinal space application of a battery pack with replaceable battery cells according to an embodiment of the invention;
fig. 8 discloses a bottom view of a replaceable cell battery pack according to an embodiment of the invention;
fig. 9 discloses a cell module removal diagram of a replaceable-cell battery pack according to an embodiment of the invention;
fig. 10 discloses a schematic diagram of sealing a casing of a replaceable-cell battery pack according to an embodiment of the invention.
The meanings of the reference symbols in the figures are as follows:
1, covering a water cooling plate;
2, filling the crack;
3, a transverse frame of the battery pack shell;
4, longitudinal frames of the battery pack shell;
5, a water cooling plate support frame;
6, longitudinal beams;
7 BDU & BMS component;
8 BDU & BMS component support frames;
9 electric cores;
10 high-voltage connection flat cables between the electric cores;
11 high-voltage connection quick-plug interface;
12 structural adhesive;
13 cell module support plates;
14 high-voltage connecting flat cables;
15 span the stringer high-pressure connection winding displacement;
16 water-cooling pipes;
17, a sealing ring;
18 bottom guard plate;
19 sealing ring.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 discloses an installation diagram of a battery pack with a replaceable battery cell according to an embodiment of the present invention, and as shown in fig. 1, the CTP battery pack with a replaceable battery cell provided by the present invention adopts a more flexible CTP battery cell arrangement scheme and structure, and can replace the battery cell from the bottom of the battery pack without affecting the usage space of the battery pack.
The coordinate system is a vehicle body coordinate system, and the coordinate Z direction is defined as the vehicle height direction and is positive upwards, the Y direction is the vehicle width direction and is positive rightwards, the X direction is the vehicle length direction and is positive backwards.
Fig. 2 discloses an exploded view of a component of a battery pack with a replaceable battery cell according to an embodiment of the present invention, and as shown in fig. 2, the CTP battery pack with a replaceable battery cell according to the present invention includes a battery cell module and a battery pack case:
the battery cell module comprises a plurality of battery cells, an electric appliance connecting box and a battery management system, and is formed by area division, wherein a high-voltage connecting position and a low-voltage connecting position of the battery cells are arranged at the bottom of the battery pack in a quick-plug high-voltage connecting mode;
the lower part of the battery pack shell is of a detachable structure, and the battery pack shell can be detached and installed at the bottom of the battery pack.
In this embodiment, the cell module includes a cell 9, a cell module support plate 13, an inter-cell high-voltage connection flat cable 10, a high-voltage connection quick-connect interface 11, a structural adhesive 12, and a crack filler 2.
In the present embodiment, the battery can body comprises a water-cooling plate upper cover 1, a battery can body transverse frame 3, a battery can body longitudinal frame 4, a longitudinal beam 6, a sealing ring 17 and a bottom protection plate 18.
Fig. 3 discloses an internal space layout diagram of a replaceable cell battery pack according to an embodiment of the present invention, and as shown in fig. 3, in order to overcome the maintainability problem of the CTP battery pack, a cell module support plate 13 at the lower part of a cell 9 is divided and separated into regions, and a plurality of cells are used as a modular whole.
The cell module support plate 13 further includes a BDU & BMS assembly support frame 8 of BDU (electrical connection box) and BMS (BATTERY management system) parts.
The battery cell module supporting plate 13 is connected with the bottom of the battery cell, and is of a special-shaped design structure, the high-voltage connecting position and the low-voltage connecting position are arranged at the bottom of the battery pack, and the battery pack can be detached and installed at the bottom.
The high-voltage connecting flat cable 14 and the cross-stringer high-voltage connecting flat cable 15 also pass through the bottom of the battery pack, and replacement of the battery cell modules at all positions can be completed.
Further, the high voltage connection cable 14 is a high voltage connection aluminum strip similar to the male end of the connector at both ends for connecting between the battery modules.
Furthermore, the high-voltage connection flat cable 15 across the longitudinal beam is a high-voltage connection aluminum row similar to the male end of the connector at both ends between the battery modules to be connected across the longitudinal beam.
In order to reduce the difficulty of assembling and disassembling the battery cell module, the crack filler 2 is adopted on the top of the battery cell 9 instead of heat-conducting structural adhesive.
The water-cooling plate upper cover 1 is a battery pack upper cover of the composite water-cooling plate, and the water-cooling plate and the upper cover are combined, so that the strength of the water-cooling plate is improved while the battery pack assembly is reduced.
The water-cooling plate upper cover 1 can be connected with the battery shell body in a laser welding connection mode and keeps a sealing state.
In this embodiment, the scheme that water-cooling board and upper cover combined together when reducing battery package structure, has promoted the intensity of water-cooling board, adopts laser welding's connected mode with the casing, when having reduced the sealing member, has also reduced processing cost, has improved battery package wholeness.
The internal parts of the battery pack can be detached from the lower part of the battery pack, and the water cooling plate does not need to be detached again in the normal maintenance process, so that the structure and the connection method of all the parts can well meet the requirements.
Traditional CTP battery package's structural design, the operation of dismantling problem electricity core can lead to parts such as most electricity core, bottom plate, water-cooling board, high-pressure connection of battery package to damage (account for whole 80% of package cost), especially high-pressure connection all adopts laser welding's CTP battery package scheme between electricity core, because for undetachable electricity between electricity core is connected, will lead to whole battery package to scrap, also remove the BDU subassembly promptly, other battery package subassemblies are all scrapped.
The CTP battery pack with the replaceable battery core provided by the invention can ensure the integrity of all components of the battery pack such as a water cooling plate, a high-voltage connection, a bottom plate and the like by replacing a single battery core module (the single battery core module accounts for 10% of the cost of the whole pack), and the maintenance time is shortened by more than 50% by a bottom maintenance mode, so that the maintenance efficiency is improved and the functional integrity of the battery pack is kept.
Fig. 4 discloses a high-voltage connection diagram of a replaceable-cell battery pack according to an embodiment of the present invention, and as shown in fig. 4, the following discusses in detail the design and functions of important parts in the replaceable-cell CTP battery pack proposed by the present invention.
The battery cell module is the core of the CTP battery pack with the replaceable battery cell.
The key points of the design of the battery cell module mainly comprise the following three points:
(1) the battery cell module must be detachable, otherwise, the aim of maintenance cannot be achieved;
(2) when the disassembly from the bottom of the battery pack is completed, the disassembly position of the battery module is required to be downward, the low-voltage connection and the high-voltage connection of the battery cell module can be disconnected from the bottom, and after the battery pack is replaced, the low-voltage connection and the high-voltage connection also need to be reset from the bottom;
(3) the disassembly and assembly process must not damage and functionally affect other components or increase the cost and time of maintenance of the battery pack.
According to the design key points discussed above, the battery cell module provided by the invention can be mounted and dismounted from the bottom of the battery pack, the scheme of quick-insertion high-voltage connection is adopted, the problems that the battery cell module cannot be dismounted from the bottom due to the adoption of bolt connection and cannot be dismounted due to the adoption of a laser welding method are solved, and the dismounting process cannot generate destructive influence on other parts of the battery pack.
The quick-plug high-voltage connection is a high-voltage connection scheme which can realize plugging and unplugging similar to a connector, and compared with the scheme of performing electric connection in the conventional battery pack by welding (damage of a battery module) and bolt connection, the quick-plug high-voltage connection can realize quick operation through plugging and unplugging and has no damage to a high-voltage connection aluminum bar and the battery module.
Fig. 5 is a structural diagram of a cell module of a battery pack with replaceable cells according to an embodiment of the present invention, and as shown in fig. 5, a cell module support plate 13 is connected to a battery pack case in a bolt connection manner, so as to fix the entire cell module and the battery pack, and when the cell module is replaced, the cell module support plate 13 needs to be detached and installed.
The battery cell module supporting plate 13 provides supporting force for the battery cell 9, bending on two sides provides clamping force for the battery cell, the whole anti-torsion capacity and rigidity are improved, pressure between the battery cells 9 is controlled, and expansion of the battery cells 9 is prevented.
The invention improves the overall torsion strength of the battery pack by means of the structural strength of the cell module and the bending of the cell module support plate 13, and can achieve the effect similar to a beam under the condition of not using the beam.
And glue overflow openings are reserved in the four directions of the bottom of the battery cell module supporting plate 13.
Crack fillers 2 are adopted between the upper part of the electric core and the water cooling plate, and heat-conducting structural adhesive is not adopted.
The crack filler 2, which is known as Gapfiller in English, is a glue having a certain thermal conductivity and filling gaps.
High-voltage connection is performed between the electric cores in the electric core module by using an inter-electric-core high-voltage connection flat cable (buss bar)10 of the same specification.
Furthermore, the inter-cell high-voltage connection flat cable 10 is a high-voltage connection aluminum strip between cells inside the battery module, and has no connector.
Optionally, the inter-cell high-voltage connection flat cable 10 is square.
And a high-voltage output connector 11 is arranged at the output side of the battery cell module.
And fast-plug high-voltage connection is carried out between the battery cell modules by adopting a high-voltage output connector assembly 11.
The high voltage output connector 11 is a high voltage connection aluminum bar having a female end similar to the connector, and serves as a high voltage output flat cable between the cell modules.
The high-voltage output connector 11 and the battery cell 9 can be connected by laser welding.
For the target of carrying out the installation and the dismantlement of electric core module from the bottom, high-pressure output connector has the flexibility advantage than other high-pressure connected mode, can accomplish the operation of bottom plug, and the position draws in and the position of vacancy in electric core bottom backplate both sides, and at actual installation and dismantlement in-process, high-pressure connector exposes downwards, and possesses sufficient space and carries out the dismouting operation, including the dismouting of low pressure connector.
Fig. 6 shows a structure diagram of a battery pack case with a replaceable battery cell according to an embodiment of the invention, as shown in fig. 6, the lower portion of the battery pack is a detachable structure, so that the lower portion of the battery pack needs to be protected by sealing, the bottom protection plate 18 of the battery pack frame of the invention uses a cavity formed by extruding aluminum alloy, and the sealing ring 17 is matched with the lower case groove to be connected with the battery pack case transverse frame 3 and the battery pack case longitudinal frame 4, so as to seal the battery pack case.
The transverse frame 3 of the battery pack shell, the longitudinal frame 4 of the battery pack shell and the longitudinal beam 6 are connected in a sealing mode in a welding mode to form the integral bearing structure of the battery pack.
The transverse frame 3 of the battery pack shell, the longitudinal frame 4 of the battery pack shell and the water-cooling plate upper cover 1 are connected in a laser welding mode, and the overall sealing requirement of the battery pack is met.
The battery pack shell transverse frame 3 of the battery pack shell is provided with a square notch at the front side of the corresponding X axis and is used as a mounting interface position of a high-voltage/low-voltage output connector assembly and an explosion-proof valve of the battery pack.
The battery pack shell transverse frame 3 of the battery pack shell is provided with a round hole at the back side of the corresponding X axis to be used as a water cooling pipe interface.
Fig. 7 is a schematic diagram illustrating a longitudinal space application of a battery pack with replaceable battery cells according to an embodiment of the present invention, and as shown in fig. 7, a water cooling tube 16 is output through a water cooling tube interface, and a sealing ring 19 is provided at a portion of the water cooling tube interface to ensure internal sealing of the battery pack.
The space between the battery cell module support plate 13 and the bottom guard plate 18 is a bottom ball impact protection buffer area, and the bottom guard plate can absorb the bottom ball impact energy in a deformation mode to prevent impact on the battery cell module.
The distance between the battery cell module and each battery pack shell is kept at 15-20 mm, and damage to the battery cell in the extrusion and collision processes of the battery pack is prevented.
From using in the whole space of battery package, almost all battery package residual space behind BDU & BMS subassembly 7, BDU & BMS subassembly support frame 8, the longeron 6 are detached to the shared battery package space of electric core, and can match different battery package designs, and through the electric core quantity of adjustment electric core module, the capacity and the operating voltage of the whole package of nimble adjustment battery package possess the ability that adapts to the demand of different platforms and motor.
The following description will be made for the installation and maintenance flow operation of the CTP battery pack with replaceable battery core.
The installation process of the CTP battery pack with the replaceable battery core further comprises the following steps:
and S11, assembling the battery cell module, and further comprising the following steps.
S111, arranging the battery cells by adding positioning spacers in the middle of 6 battery cells according to the interval of 0.5mm between the battery cells 9;
s112, coating structural adhesive 12 on the bottom surface of the whole discharged battery cell module, putting the battery cell module into the battery cell module support plate 13, and bonding the battery cell module support plate 13 with the battery cell module;
s113, welding the high-voltage connection flat cable 10 between the battery cells;
and S114, welding the acquisition circuit, fixing an FPC (flexible printed circuit) in an FPC groove, and adhering the connector position to the cell module support plate 13.
And S12, installing the battery shell, and further comprising the following steps.
S121, installing a battery pack water cooling plate upper cover 1, a water cooling output terminal structural member, high-voltage and low-voltage connectors, an explosion-proof valve and the like;
and S122, welding the transverse frame 3 of the battery pack shell, the longitudinal frame 4 of the battery pack shell and the longitudinal beam 6.
S13, assembling and encasing the BDU & BMS assembly 7, further comprising the following steps.
S131, the BDU & BMS assembly 7 is in bolt connection with the corresponding BDU & BMS assembly support frame 8;
and S132, connecting the BDU & BMS assembly support frame 8 with the transverse frame 3 of the battery pack shell and the longitudinal frame 4 of the battery pack shell through bolts.
And S14, placing the battery cell module into a shell, and further comprising the following steps.
S141, the battery cell module is in bolt connection with the transverse frame 3 of the battery pack shell and the longitudinal frame 4 of the battery pack shell;
and S142, mounting the high-voltage connecting flat cable 14 and the cross-stringer high-voltage connecting flat cable 15 from the bottom, and connecting the BDU & BMS assembly 7 and the battery cell module.
S15, installing the thermal management system, and further comprising the following steps.
S151, bonding crack fillers 2 on the upper side of the battery cell module;
s152, mounting the water cooling plate upper cover 1 according to the connection position and requirements;
and S153, connecting the water cooling pipe 16.
And S16, hermetically connecting the battery shell, and further comprising the following steps.
S161, welding the upper cover 1 of the water cooling plate of the battery pack with the transverse frame 3 of the battery pack shell and the longitudinal frame 4 of the battery pack shell in a laser mode;
and S162, the bottom guard plate 18 is connected with the transverse frame 3 of the battery pack shell and the longitudinal frame 4 of the battery pack shell through bolts.
The maintenance operation process of the CTP battery pack with the replaceable battery core further comprises the following steps:
fig. 8 discloses a bottom view of a battery pack with replaceable battery cells, the bottom view of the CTP battery pack with the bottom protection plate 18 removed is shown in fig. 8, and S21, the battery pack is maintained to be powered off, and the method further includes the following steps.
S211, disconnecting the high-voltage connection between the battery pack and the automobile;
s212, removing the bottom protection plate 18 of the battery pack;
and S213, opening the maintenance switch in the battery pack from the bottom.
Fig. 9 discloses a cell module removal diagram of a battery pack with replaceable cells according to an embodiment of the present invention, and as shown in fig. 9, S22, the removing a problem cell module further includes the following steps.
S221, confirming the problem battery module;
s222, disconnecting the high-voltage connecting flat cable 14, the cross-stringer high-voltage connecting flat cable 15 and the collecting line between the battery cell modules;
and S223, detaching the battery cell module support plate 13 from the battery pack.
S23, installing a brand new battery cell module, and further comprising the following steps:
s231, confirming and checking the state of the new battery cell module;
s232, precoating crack fillers 2 above the brand-new cell module;
s233, connecting and installing the water cooling plate support frame 5 of the battery cell module with a battery pack;
and S234, connecting the high-voltage connecting flat cable 14 among the battery cell modules, the cross-stringer high-voltage connecting flat cable 15 and the acquisition line (without replacement).
Fig. 10 discloses a schematic diagram of sealing a casing of a replaceable-cell battery pack according to an embodiment of the present invention, and as shown in fig. 10, S24, powering and sealing the battery pack further includes the following steps.
S241, closing a maintenance switch in the battery pack;
s242, mounting the bottom guard plate 18 on the battery pack, and checking sealing;
and S243, opening the high-voltage connection between the battery pack and the automobile.
According to the CTP battery pack with the replaceable battery core, when the battery core in the CTP battery pack is in a problem, the position of the battery core in the problem can be confirmed through the BMS, the position of the battery core module to be replaced is determined, the replacement operation of the battery core module is carried out, the operation flow that the battery pack is detached from a vehicle can be omitted, the detachment and installation can be completed on a vehicle body, and the efficiency is higher.
While, for purposes of simplicity of explanation, the methodologies are shown and described as a series of acts, it is to be understood and appreciated that the methodologies are not limited by the order of acts, as some acts may, in accordance with one or more embodiments, occur in different orders and/or concurrently with other acts from that shown and described herein or not shown and described herein, as would be understood by one skilled in the art.
As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.
The embodiments described above are provided to enable persons skilled in the art to make or use the invention and that modifications or variations can be made to the embodiments described above by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of protection of the present invention is not limited by the embodiments described above but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (12)
1. The utility model provides a battery package of removable electric core which characterized in that, includes electric core module and battery package casing:
the battery cell module comprises a plurality of battery cells, an electric appliance connecting box and a battery management system, and is formed by area division, wherein a high-voltage connecting position and a low-voltage connecting position of the battery cells are arranged at the bottom of the battery pack in a quick-plug high-voltage connecting mode;
the lower part of the battery pack shell is of a detachable structure.
2. The battery pack with the replaceable battery cells as recited in claim 1, wherein the battery cells are arranged at a predetermined interval in units of a certain number, and a positioning spacer is added in the middle of the battery cells to form a battery cell module.
3. The battery pack with the replaceable battery cell of claim 1, wherein the battery cell module comprises a high-voltage connection flat cable and a cross-stringer high-voltage connection flat cable, and the replacement of the battery cell module at all positions is completed by realizing high-voltage connection from the bottom of the battery pack;
the high-voltage connecting flat cable is a high-voltage connecting aluminum row which is connected with two ends between the battery modules;
the cross-longitudinal-beam high-voltage connection flat cable is a high-voltage connection aluminum row which crosses the longitudinal beam and is connected with two ends between the battery modules.
4. The battery pack with replaceable battery cells of claim 1, wherein:
the battery cell module adopts high-voltage connection winding displacement between the battery cells to carry out high-voltage connection between the battery cells, and the high-voltage connection winding displacement between the battery cells is the high-voltage connection aluminum bar between the battery cells in the battery module.
5. The battery pack with replaceable battery cells of claim 1, wherein:
and high-voltage output connectors are adopted for fast high-voltage connection between the battery cell modules, and the output sides of the battery cell modules are provided with the high-voltage output connectors.
6. The battery pack with a replaceable battery cell of claim 1, wherein the battery pack shell comprises a water-cooling plate upper cover, and the water-cooling plate and the battery pack upper cover are combined and connected to form the battery pack shell.
7. The battery pack with replaceable battery cells of claim 6, wherein the battery cells, the top parts and the water-cooling plate upper covers are connected and combined by crack fillers.
8. The battery pack with a replaceable battery cell of claim 1, wherein the battery cell module further comprises a battery cell module support plate connected to the bottom of the battery cell and bonded by a structural adhesive:
glue overflow openings are reserved in the four directions of the bottom of the battery cell module supporting plate, and bending structures are arranged on the two sides of the battery cell module supporting plate to provide clamping force for a battery cell;
the battery cell supporting plate is connected with the battery pack shell in a bolt connection mode, and the whole battery cell module is fixed with the battery pack shell.
9. The replaceable-cell battery pack according to claim 6, wherein the battery pack case further comprises a battery pack case transverse frame, a battery pack case longitudinal frame and a longitudinal beam:
the transverse frame of the battery pack shell, the longitudinal frame of the battery pack shell and the longitudinal beam are hermetically connected in a welding mode to form a whole bearing structure of the battery pack;
the transverse frame of the battery pack shell, the longitudinal frame of the battery pack shell and the upper cover of the water cooling plate are connected in a laser welding mode.
10. The replaceable-cell battery pack according to claim 9, wherein:
a square notch is formed in the front side of the corresponding X axis of the transverse frame of the battery pack shell and is used as a mounting interface position of a high-voltage/low-voltage output connector and an explosion-proof valve of the battery pack;
a circular hole is formed in the transverse frame of the battery pack shell and on the back side of the corresponding X axis to serve as a water-cooling pipe interface;
the water cooling pipe is output through a water cooling pipe interface, and a sealing ring is arranged at the interface part of the water cooling pipe and the water cooling pipe.
11. The battery pack with the replaceable battery core according to claim 9, wherein the battery pack shell further comprises a bottom guard plate, the bottom guard plate is extruded from aluminum alloy to form a cavity, and the lower shell groove is matched with the sealing ring to be connected with the transverse frame and the longitudinal frame of the battery pack shell so as to seal the battery pack shell.
12. The replaceable-cell battery pack according to claim 1, wherein the distance between the cell module and the battery pack shell is 15-20 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412499.9A CN112490577A (en) | 2020-12-04 | 2020-12-04 | Battery pack with replaceable battery core |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011412499.9A CN112490577A (en) | 2020-12-04 | 2020-12-04 | Battery pack with replaceable battery core |
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| CN112490577A true CN112490577A (en) | 2021-03-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011412499.9A Pending CN112490577A (en) | 2020-12-04 | 2020-12-04 | Battery pack with replaceable battery core |
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Application publication date: 20210312 |