CN116014372A - Power battery pack and integration method - Google Patents
Power battery pack and integration method Download PDFInfo
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- CN116014372A CN116014372A CN202310084710.6A CN202310084710A CN116014372A CN 116014372 A CN116014372 A CN 116014372A CN 202310084710 A CN202310084710 A CN 202310084710A CN 116014372 A CN116014372 A CN 116014372A
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 230000010354 integration Effects 0.000 title abstract description 16
- 239000000178 monomer Substances 0.000 claims abstract description 57
- 238000005070 sampling Methods 0.000 claims description 48
- 238000009434 installation Methods 0.000 claims description 11
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 24
- 238000004519 manufacturing process Methods 0.000 abstract description 22
- 238000012423 maintenance Methods 0.000 abstract description 13
- 238000010276 construction Methods 0.000 abstract description 5
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 12
- 238000001514 detection method Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 8
- 238000011084 recovery Methods 0.000 description 7
- 229910052759 nickel Inorganic materials 0.000 description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 5
- 238000013461 design Methods 0.000 description 5
- 229910052802 copper Inorganic materials 0.000 description 4
- 239000010949 copper Substances 0.000 description 4
- 230000000712 assembly Effects 0.000 description 3
- 238000000429 assembly Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 229910000838 Al alloy Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- JRBRVDCKNXZZGH-UHFFFAOYSA-N alumane;copper Chemical compound [AlH3].[Cu] JRBRVDCKNXZZGH-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
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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 utility model provides a power battery pack and integrated method, concretely, realize electric connection through post and busbar welding through current battery monomer and realize electric connection through post and busbar interference fit instead, can harmless the disassembling when realizing battery monomer maintenance or retrieving, reduce busbar and battery monomer post laser welding equipment input, form box subassembly under busbar, electric support, heat conduction buffer structure and the battery pack box preassembly, the battery monomer is at the assembly line body directly with the mode of box subassembly assembly down, the total assembly line body length of battery pack has been shortened, the production efficiency of battery pack has been improved, thereby the construction input of battery pack production line has been reduced, preassemble through busbar and electric support, battery management adopts subassembly high integration assembly, the redundant occupation of space to the flexible part exclusive use in the battery group formation process has been avoided, space utilization is greatly improved.
Description
Technical Field
The utility model relates to the field of battery pack integration, in particular to a power battery pack and an integration method.
Background
Chinese patent application number: CN213459909U; publication date: 20210615 discloses a battery pack integration frame, which comprises connecting pieces, bus bar assemblies, battery packs, support rails and upright posts, and is mainly characterized in that the upright posts are fixedly connected with the connecting pieces, the bus bar assemblies and the support rails respectively, the battery packs are positioned between the two upright posts, the bus bar assemblies are positioned above the battery packs, the battery packs are placed on the support rails, and the upright posts are provided with holes.
Chinese patent application number: CN112615070a; publication date 20210406 discloses a battery energy storage integrated system and method, comprising the following main steps: step one, the battery pack energy storage module is connected in series through a plurality of batteries to store and output electric quantity; the battery pack is connected with the alternating current side through a transformer; step two, the battery pack electric quantity detection module collects the electric quantity in the battery through an electric quantity detection circuit; the battery temperature detection module detects heat generated by the battery pack through a temperature sensor; step three, the battery voltage detection module collects the voltage of the battery pack through a voltage sensor; the battery pack leakage detection module detects whether the battery pack leaks electricity or not through a leakage detection circuit; through group battery electric quantity detection module, battery temperature detection module, battery voltage detection module and group battery electric leakage detection module, can provide the multiparameter reference for the safety precaution, be connected with cloud service module through communication module, handle the corresponding data of group battery, provide more accurate group battery state judgement result for the follow-up maintenance of group battery.
At present, the battery pack effectively connects the positive and negative electrodes of a plurality of battery cells in series and parallel through the bus bar, so that the superposition of the voltage of the battery pack and the accumulation of the total electric quantity requirement are realized. The battery pack is characterized in that a certain number of single batteries are connected together through a bus bar respectively, and all positive electrodes are connected together through another bus bar, so that a parallel branch is formed. The welding of the bus bar and the positive and negative electrodes of the battery and the fixing between the batteries are steps necessary for assembling the storage battery or the battery pack. The means commonly adopted by the industry are: the battery unit and the bus bar are firstly welded by laser to form a battery module, and then the battery module is assembled into a lower box body and finally the battery group is completed by connecting the bus bars between the modules at high voltage. The laser welding parts of the power battery are more, the materials are mainly aluminum alloy, a small number of parts are made of red copper, nickel and other materials, and a small number of parts are made of stainless steel as a battery shell, in the materials, the laser welding process of the nickel and the stainless steel is relatively simple and mature, but the laser welding of the aluminum alloy and the red copper still has more difficulties. In addition to the effects of material properties, the state of the weld joint can also have a significant impact on the welding effect.
The bus bars commonly used for the power battery module are as follows: nickel sheet, copper aluminum composite busbar, copper busbar, total positive total negative busbar, aluminum busbar, copper flexible connection, aluminum flexible connection, copper foil flexible connection, etc. can also be used. The quality of the processing of the busbar and the flexible connection needs to be assessed from the following aspects:
1) If the material of the bus bar meets the requirements, the resistivity will be increased if the material of the bus bar does not meet the requirements, and it is particularly necessary to determine if the material of the bus bar meets the requirements related to ROHS.
2) Whether the bus critical dimension is in place or not is determined, and the out-of-tolerance of the critical dimension may result in insufficient safety distance between high voltage devices during the assembly process and cause serious safety hazards.
3) The bonding force between the soft connection and the hard area, and the stress absorption condition of the soft area.
4) Whether the overcurrent capacity of the actual processed flexible connection and the bus bar reaches the design standard or not, and whether the insulated thermoplastic sleeve part is damaged or not.
The design disadvantages are mainly:
1. the key process of grouping the battery cells by the bus bar involves laser welding, which cannot be accomplished without damage. Specifically, the battery cell post and the busbar are formed into a battery module by laser welding; if a certain battery monomer in the module fails in the production or use process, the whole module needs to be replaced in maintenance, the failed battery monomer cannot be directly replaced, and the maintenance cost is extremely high; meanwhile, when the battery pack cannot meet the performance requirements in the power field and is recycled, disassembled and recycled in a gradient manner, the bus bar laser welding cannot be disassembled without damage, so that the defects of higher recycling cost, lower recycling efficiency, reduced recycling performance of the battery monomers and the like exist;
2. the production line has more steps, lower production efficiency and higher equipment investment; the battery pack manufacturing production line of the conventional grouping mode in the current industry generally needs about 50 steps and must be operated in series on the final assembly line, the battery pack manufacturing efficiency in the current industry is generally about 10JPH, the manufacturing efficiency of the whole vehicle can generally reach 30JPH, and the production line of the battery pack with the same quantity can not meet the productivity requirement of the whole vehicle production line; the insufficient capacity matching part of the battery pack must be met by new production line investment, and the single line investment is higher due to large-scale heavy asset equipment such as more production line steps, laser welding and the like;
3. the space utilization rate is low; because the battery management adopts the reservation of flexible piece safety design gaps such as wire harnesses, high-voltage connecting buses among modules and the like and process operation space, the overall space utilization rate of the battery pack is low.
4. The steps of installation and maintenance are complicated, and the safety performance is not high.
Disclosure of Invention
In view of the above-mentioned drawbacks or shortcomings in the prior art, the present application is directed to providing a power battery pack and an integration method, which can realize nondestructive disassembly during maintenance or recovery of battery cells and improve production efficiency of the battery pack.
According to the technical scheme that this application embodiment provided, power battery group includes box subassembly and battery monomer under the group battery, box, electrical bracket and busbar under the group battery, the electrical bracket is fixed to be set up under the group battery on the box, and the busbar is installed at the lateral part of electrical bracket, the busbar lateral part is equipped with the location shrinkage pool that supplies battery monomer assembly, and the equal integrated into one piece of battery monomer positive and negative pole is equipped with battery monomer post, and the cooperation of location shrinkage pool joint on battery monomer post and the busbar, the battery monomer is the level setting and sets up in the location shrinkage pool on the busbar on the lower box and the joint, battery monomer and busbar, electrical bracket and battery group lower box interference fit.
According to the technical scheme that this application embodiment provided, still include the fixed roof beam subassembly of group battery, the lower box subassembly of group battery still includes heat conduction buffer structure, heat conduction buffer structure is the fixed bottom that sets up in the box under the group battery in rectangle form, and heat conduction buffer structure is located battery monomer bottom, the fixed roof beam subassembly both ends of group battery are fixed to be set up on the box frame roof beam under the group battery, and the fixed roof beam subassembly of group battery is located battery monomer top.
According to the technical scheme provided by the embodiment of the application, the side part of the battery single pole is provided with the pole spring plate in an arc-shaped manner, and a pole spring is fixedly arranged between the pole spring plate and the battery single pole.
According to the technical scheme that this application embodiment provided, the electrical bracket is dovetail form fixed set up on the outer wall of box frame roof beam top under the group battery, and one side of electrical bracket is equipped with the installation cavity, the busbar joint sets up in the installation cavity of electrical bracket, busbar top integrated into one piece is equipped with the connecting plate.
According to the technical scheme that this application embodiment provided, the electric support includes four parallel arrangement at the inside horizontal support of box under the group battery, the busbar includes four horizontal rows, four horizontal rows and four horizontal supports one-to-one, every horizontal row joint setting is in a horizontal support.
According to the technical scheme that this application embodiment provided, box subassembly still includes battery management sampling subassembly under the group battery, battery management sampling subassembly includes two sets of horizontal management sampling rows, and two sets of horizontal management sampling rows set up on two horizontal supports at box middle part under the group battery, and every horizontal management sampling row of group and a horizontal support fixed connection.
According to the technical scheme provided by the embodiment of the application, two groups of transverse management sampling rows are fixedly connected with two transverse rows in the middle of the lower box body of the battery pack.
According to the technical scheme that this application embodiment provided, be equipped with a plurality of connecting block on the horizontal management sampling row, connecting block and the connecting plate fixed connection at busbar top.
According to the technical scheme that this application embodiment provided, still include group battery upper cover, group battery upper cover can dismantle the setting in group battery fixed beam subassembly top.
An integration method of a power battery pack, comprising the following steps:
step one: the heat conduction buffer structure is arranged at the bottom end of the lower box body of the battery pack in a bonding mode, the electric support is arranged on a frame beam of the lower box body of the battery pack in an interference fit mode, the side portion of the electric support is provided with a mounting position of a bus bar, and the bus bar and the electric support are integrated integrally;
step two: after the bus is integrated, the battery management sampling assembly is further assembled and integrated with the bus, the battery management sampling assembly is positioned at the top of the bus and consists of a flexible circuit board, the flexible circuit board and the electric bracket are assembled and integrated through an adhesive process, and the flexible circuit board and the bus are welded through ultrasonic waves;
step three: the positive electrode and the negative electrode of the battery cell are fixedly and electrically connected with a battery cell pole, a pole spring plate is fixedly welded at the end of the battery cell pole, and a pole spring is fixedly assembled between the pole spring plate and the battery cell pole;
step four: then, the battery cell polar posts at the two ends of the battery cell are clamped between the positioning pits on the two groups of bus bars in a limiting way;
step five: after the assembly of the battery monomer is completed, two ends of the battery pack fixing beam assembly are respectively and fixedly arranged on two sides of a frame beam of the battery lower box body, and finally, the battery pack upper cover is fixedly assembled on the tops of the battery pack lower box body and the battery pack fixing beam assembly.
In summary, the application provides a power battery pack and an integration method, which have the beneficial effects that:
1. the utility model realizes the design of electric connection of the battery cells in groups through interference fit, effectively realizes nondestructive disassembly during maintenance or recovery of the battery cells, and reduces the maintenance and recovery cost of the battery pack.
2. The utility model realizes the process of battery monomer group electric connection overcharge, welding and removing, shortens the length of the total assembly line body of the battery pack, effectively reduces the construction investment of the battery pack production line and improves the production efficiency.
3. The utility model realizes the high integration of the electric connection busbar, the battery sampling management component and other related flexible parts in the battery pack group scheme, and greatly improves the space utilization rate.
According to the utility model, the existing electric connection mode of the battery monomer through welding the pole and the bus bar is changed into electric connection through interference fit of the pole and the bus bar, so that the battery monomer can be disassembled nondestructively during maintenance or recovery, and the investment of the laser welding equipment of the bus bar and the pole of the battery monomer is reduced. The lower box body assembly is formed by pre-assembling the busbar, the electric bracket and the lower box body of the battery pack, and the battery unit is directly assembled with the lower box body assembly in the assembly line body, so that the length of the assembly line body of the battery pack is shortened, the production efficiency of the battery pack is improved, and the construction investment of the production line of the battery pack is reduced; through busbar and the integrated assembly of electrical bracket pre-installation, avoided the battery to make up the redundant occupation of space that the in-process flexible part exclusive use was organized, improved space utilization greatly.
In addition, the heat exchange of the battery is realized through the arrangement of the heat conduction buffer structure, and the longitudinal positioning of the battery pack is realized through the cooperation of the heat conduction buffer structure, the battery pack fixing beam assembly and the lower box body assembly. The battery management sampling assembly and the bus are electrically insulated and isolated and connected with the electric appliance bracket, so that unified management of the battery pack is realized.
Drawings
Fig. 1 is a schematic general assembly diagram of a power battery pack according to an embodiment of the present application.
Fig. 2 is an exploded schematic view of a power battery pack according to an embodiment of the present application.
Fig. 3 is a general front view of a power battery pack according to an embodiment of the present application.
Fig. 4 showsbase:Sub>A cross-sectional view along linebase:Sub>A-base:Sub>A in fig. 3.
Fig. 5 is a schematic structural diagram of a battery cell of a power battery pack according to an embodiment of the present application.
Fig. 6 shows an enlarged schematic view at a in fig. 5.
Fig. 7 is a plan view of an end of a battery cell of a power battery pack according to an embodiment of the present application.
Fig. 8 is a schematic perspective view of a lower case assembly of a power battery pack according to an embodiment of the present application.
The text labels in the figures are expressed as:
1-a lower box body of the battery pack; 2-a heat conduction buffer structure; 3-an electrical rack; 4-bus bars; 5-battery cells; 6-battery pack securing beam assembly; 7-a battery management sampling component; 8-battery pack top cover; 5-1-battery cell posts; 5-2-pole spring plates; 5-3-pole spring.
Detailed Description
The present application will now be described in further detail with reference to the drawings and examples, it being understood that the specific embodiments described herein are for purposes of illustration only and not limitation, and the drawings only show portions of the utility model that are relevant for ease of description.
It should be noted that, without conflict, the embodiments and features in the embodiments may be combined with each other, and the present application will be described in detail with reference to the drawings and the embodiments.
As mentioned in the background art, for the problems in the prior art, a power battery pack and an integration method are provided: as shown in fig. 1, fig. 2 and fig. 8, including the lower box body assembly of group battery, battery cell 5, battery pack fixed beam assembly 6 and battery pack upper cover 8, the lower box body assembly of group battery is by lower box body 1 of group battery, heat conduction buffer structure 2, electric support 3, busbar 4 and battery management sampling assembly 7 are constituteed, lower box body 1 of group battery, heat conduction buffer structure 2, electric support 3, busbar 4 and battery management sampling assembly 7 partial shipment integration become lower box body assembly of group battery, the lower box body assembly of group battery is preinstalled, can constitute a frame, be convenient for the step-by-step installation of battery cell 5 and battery pack fixed beam assembly 6, battery cell 5 is the horizontality setting in lower box body 1 of group battery inside, battery pack fixed beam assembly 6 both ends are fixed to be set up on the frame roof beam of lower box body 1 of group battery, battery pack fixed beam assembly 6 is the spacing installation for guaranteeing the vertical direction of battery cell 5, and battery pack fixed beam assembly 6 is located the top of battery cell 5, the upper cover 8 on the battery pack fixed beam assembly 6 can dismantle the top of battery pack fixed beam assembly 6, interference fit 4 and the electrical dimension of cell 5 and the frame is realized in the interference fit of battery cell fixed beam assembly 6, the step size is reduced when the battery cell 5 is realized, the step is reduced, the step is realized and the electric connection is reduced, the whole electrical connection is realized and the cost of the whole is reduced, the step is reduced and the cost of the whole is reduced, the step is reduced and the whole is reduced and the cost is reduced and can be realized.
The heat conduction buffer structure 2 shown in fig. 2 to 4 is rectangular and fixedly arranged at the bottom end inside the lower box body 1 of the battery pack, the heat conduction buffer structure 2 is arranged at the bottom of the battery monomer 5, the heat conduction buffer structure 2 is used for realizing the heat management energy exchange interface requirement of the battery monomer 5, the buffer effect of the battery monomer 5 is also realized, the battery monomer 5 is prevented from being impacted by rigid extrusion, the bus bar 4 is integrally arranged in the mounting cavity of the electric bracket 3, the top of the bus bar 4 is integrally formed with a connecting plate, the connecting plate is fixedly connected with a flexible circuit board in the battery management sampling assembly 7, the vertical direction assembly of the battery monomer 5 is realized through the lower box body 1 of the battery pack and the heat conduction buffer structure 2, the battery monomer 5 can be well fixed in both the transverse direction and the longitudinal direction, the heat conduction buffer structure 2 is fixedly arranged under the battery monomer 5, the heat management of the battery monomer 5 is used for protecting the battery monomer 5, the battery monomer 5 is prevented from being impacted by rigid extrusion from the heat angle, and the battery monomer 5 is prevented from being deformed to be protected from the deformation angle. The heat conduction buffer structure 2 is fixedly arranged at the bottom end inside the lower box body 1 of the battery pack through bolts, the busbar 4 is integrated with the electric bracket 3 through an in-mold injection molding process, and the busbar 4 can be electrically isolated from the battery management sampling assembly 7 through the integrated integration of the mounting cavity and the electric bracket 3.
As shown in fig. 5 to 6, the electrical bracket 3 is fixedly arranged on the outer wall of the top of the frame beam of the lower battery box 1 in a dovetail groove shape, one side of the electrical bracket 3 is provided with an installation cavity, the installation cavity on one side of the electrical bracket 3 is used for providing an integrated carrier for the busbar 4, and the lower battery box 1, the heat conducting buffer structure 2, the electrical bracket 3, the busbar 4 and the battery management sampling assembly 7 in the lower battery box assembly can be integrated to form a frame first, so that the assembly efficiency is convenient to improve.
The battery management sampling assembly 7 is fixedly integrated to be arranged on a connecting plate at the top of the busbar 4, a positioning concave hole for assembling the battery monomer 5 is formed in the side part of the busbar 4, clamping limiting carriers are provided on two sides of the battery monomer 5 in the positioning concave hole, battery monomer poles 5-1 are integrally formed in the positive and negative poles of the battery monomer 5, and the battery monomer poles 5-1 are clamped in the positioning concave hole, so that the battery monomer 5 is fixed, and the functional requirements of the end part packaging of the battery monomer 5 and a charging and discharging interface of the battery monomer 5 are mainly met by the battery monomer poles 5-1. The battery management sampling assembly 7 is assembled and integrated with the electric bracket 3 through a plastic hot riveting process, or is connected with other materials with good electric conduction and heat conduction performance through low-power ultrasonic welding, the connection part of the flexible circuit board and the electric bracket 3 is not easy to embrittle through the hot riveting process, the connection part is firmer, the tightness is good, the whole structure is impact-resistant, the performance of the whole assembly is greatly improved, the battery management sampling assembly 7 is connected with the busbar 4 through a nickel sheet and laser welding switching mode, and the laser welding nickel sheet has the characteristics of deep and narrow welding seam, small heat affected zone, high compactness and the like. The battery management sampling assembly 7 is electrically connected with the battery cells 5 through the communication terminals, and the battery management sampling assembly 7 is connected with the bus bar 4 in a sampling manner, so that the application operation of data acquisition, battery state calculation and energy management on each integrated assembled battery cell 5 is realized.
The electric bracket 3 comprises four transverse brackets which are arranged in the lower box body 1 of the battery pack in parallel, the busbar 4 comprises four transverse rows, the four transverse rows are in one-to-one correspondence with the four transverse brackets, each transverse row is clamped in one transverse bracket, the battery management sampling assembly 7 comprises two groups of transverse management sampling rows, the two groups of transverse management sampling rows are arranged on the two transverse brackets in the middle of the lower box body 1 of the battery pack, each group of transverse management sampling rows is fixedly connected with one transverse bracket, the two groups of transverse management sampling rows are fixedly connected with the two transverse rows in the middle of the lower box body 1 of the battery pack, a plurality of connecting blocks are arranged on the transverse management sampling rows, and the connecting blocks are fixedly connected with the connecting plates at the top of the busbar 4, so that the battery management sampling assembly 7 can manage the battery packs on the left side and the right side simultaneously.
As shown in fig. 7, a pole spring piece 5-2 is fixedly arranged on the side of the battery monomer pole 5-1 in an arc shape, a pole spring 5-3 is fixedly arranged between the pole spring piece 5-2 and the battery monomer pole 5-1, and the pole spring piece 5-2 mainly meets the elastic deformation requirement of the battery monomer 5 for realizing assembly through interference fit; the pole spring 5-3 is mainly used for supplementing the elastic supporting function of the pole spring 5-2 and compensating the rebound resilience loss of the pole spring 5-2 in the process of disassembling and assembling the battery cell 5 with multiple disassembly and assembly requirements, and the battery cell 5 can realize the functions of assembly and electric connection through elastic deformation and interference fit by using the pole spring 5-2 or the pole spring 5-3, so that a battery cell group non-welding electric connection mode is formed.
In summary, the utility model changes the existing electric connection mode of the battery monomer 5 through welding the battery monomer pole 5-1 and the busbar 4 into the electric connection mode through interference fit of the battery monomer pole 5-1 and the busbar 4, the ordered fixing of the battery monomer 5 can be realized only by adopting a pressing and clamping fixing mode without welding during installation, the method is more convenient and quick to connect, the method can realize nondestructive disassembly during maintenance or recovery of the battery monomer 5, and the damaged certain battery blocks can be maintained or replaced in a targeted way during maintenance, in addition, the investment of laser welding equipment for the busbar 4 and the battery monomer pole 5-1 is reduced, and the cost is greatly reduced; in addition, the busbar 4, the electric bracket 3, the heat conduction buffer structure 2 and the battery pack lower box 1 are preassembled to form a lower box assembly, and the battery unit 5 is directly assembled with the lower box assembly in the assembly line, so that the length of the battery pack assembly line is shortened, the assembly speed is high, the production efficiency of the battery pack is improved, and the construction investment of the battery pack production line is reduced; the bus 4 and the electric bracket 3 are preassembled, and the battery management sampling assembly 7 is integrally assembled, so that redundant occupation of space caused by independent use of flexible parts in the battery assembly process is avoided, and the space utilization rate is greatly improved.
On the basis of the above embodiment, there is also provided an integration method of a power battery pack, applied to the above power battery pack, the integration method including the steps of:
step one: the heat conduction buffer structure 2 is arranged at the bottom end inside the lower box body 1 of the battery pack in a close fit mode, the electric support 3 is arranged on a frame beam of the lower box body 1 of the battery pack in an interference fit mode, the mounting position of the bus bar 4 is designed at the side portion of the electric support 3, and the bus bar 4 is integrated with the electric support 3 in an integrated mode through a mechanical clamping process.
Step two: after the busbar 4 is integrated, the battery management sampling assembly 7 is assembled and integrated with the busbar 4, the battery management sampling assembly 7 is located at the top of the busbar 4, the battery management sampling assembly 7 is composed of a flexible circuit board, the flexible circuit board is assembled and integrated with the electrical bracket 3 through an adhesive process, and the flexible circuit board is welded with the busbar 4 through ultrasonic waves.
Step three: and the positive electrode and the negative electrode of the battery cell 5 are fixedly and electrically connected with a battery cell pole 5-1, a pole spring piece 5-2 is fixedly welded at the end of the battery cell pole 5-1, and a pole spring 5-3 is fixedly assembled between the pole spring piece 5-2 and the battery cell pole 5-1.
Step four: the battery cell polar posts 5-1 at two ends of the battery cell 5 are arranged between the positioning pits on the two groups of bus bars 4 in a limiting and clamping manner.
Step five: after the assembly of the battery unit 5 is completed, two ends of the battery pack fixing beam assembly 6 are respectively and fixedly arranged on two sides of the frame beam of the battery lower box body 1, and the battery pack upper cover 8 is fixedly assembled on the tops of the battery pack lower box body 1 and the battery pack fixing beam assembly 6.
Further, the heat conduction buffer structure 2 is fixedly arranged at the bottom end inside the lower box body 1 of the battery pack through bolts, and the busbar 4 is integrated with the electric bracket 3 through an in-mold injection molding process. The battery management sampling assembly 7 and the electric bracket 3 are assembled and integrated through a plastic hot riveting process, and the battery management sampling assembly 7 and the busbar 4 are connected through a nickel plate and laser welding switching mode. The battery management sampling assembly 7 is electrically connected with the battery cell 5 through a communication terminal.
According to the embodiment of the utility model, the design of the electric connection of the battery cells 5 in groups is realized through interference fit, so that the battery cells 5 can be disassembled without damage during maintenance or recovery, and the maintenance and recovery cost of the battery pack is reduced. The utility model realizes the process of electric connection of the battery cells 5 in groups, overcharge, welding and removing, shortens the length of the total assembly line of the battery pack by preassembling the lower box body component of the battery pack, effectively reduces the construction investment of the production line of the battery pack, and improves the production efficiency. In addition, the utility model realizes the integration of the electric connection busbar 4, the battery sampling management component 7 and other related flexible parts in the battery pack group scheme, and greatly improves the space utilization rate.
Specific examples are presented herein to illustrate the principles and embodiments of the present application and are merely provided to aid in understanding the methods of the present application and their core ideas. The foregoing is merely a preferred embodiment of the present application, and it should be noted that, due to the limited nature of text, there is an objectively infinite number of specific structures, and that, to those skilled in the art, several improvements, modifications or changes can be made, and the above technical features can be combined in a suitable manner, without departing from the principles of the present utility model; such modifications, variations and combinations, or the direct application of the concepts and aspects of the utility model in other applications without modification, are intended to be within the scope of this application.
Claims (10)
1. The utility model provides a power battery group, its characterized in that, box subassembly and battery monomer (5) under the group battery, box subassembly under the group battery includes group battery under box (1), electric support (3) and busbar (4), electric support (3) are fixed to be set up on box (1) under the group battery, and the lateral part at electric support (3) is installed to busbar (4), busbar (4) lateral part is equipped with the location shrinkage pool that supplies battery monomer (5) assembly, and the equal integrated into one piece of positive negative pole of battery monomer (5) is equipped with battery monomer post (5-1), and the location shrinkage pool joint cooperation on battery monomer post (5-1) and busbar (4), battery monomer (5) are the level state setting and set up in the location shrinkage pool on busbar (4) on lower box (1), electric support (3) and battery unit interference fit under box (1).
2. The power battery pack according to claim 1, further comprising a battery pack fixing beam assembly (6), wherein the battery pack lower box assembly further comprises a heat conduction buffer structure (2), the heat conduction buffer structure (2) is fixedly arranged at the bottom end inside the battery pack lower box (1) in a rectangular shape, the heat conduction buffer structure (2) is located at the bottom of the battery cell (5), two ends of the battery pack fixing beam assembly (6) are fixedly arranged on frame beams of the battery pack lower box (1), and the battery pack fixing beam assembly (6) is located at the top of the battery cell (5).
3. The power battery pack according to claim 2, wherein a pole spring piece (5-2) is fixedly arranged on the side portion of the battery cell pole (5-1) in an arc shape, and a pole spring (5-3) is fixedly arranged between the pole spring piece (5-2) and the battery cell pole (5-1).
4. A power battery pack according to claim 3, wherein the electric bracket (3) is fixedly arranged on the outer wall of the top of the frame beam of the lower box body (1) of the battery pack in a dovetail shape, an installation cavity is formed in one side of the electric bracket (3), the bus bar (4) is clamped in the installation cavity of the electric bracket (3), and a connecting plate is integrally formed at the top of the bus bar (4).
5. A power battery according to claim 4, characterized in that the electrical rack (3) comprises four transverse racks arranged in parallel inside the lower battery case (1), the busbar (4) comprises four transverse rows, which are in one-to-one correspondence with the four transverse racks, and each transverse row is arranged in one transverse rack in a clamping manner.
6. The power battery pack according to claim 5, wherein the battery pack lower case assembly further comprises a battery management sampling assembly (7), the battery management sampling assembly (7) comprises two sets of transverse management sampling rows, the two sets of transverse management sampling rows are arranged on two transverse brackets in the middle of the battery pack lower case (1), and each set of transverse management sampling rows is fixedly connected with one transverse bracket.
7. A power battery according to claim 6, characterized in that two sets of transverse management sampling rows are fixedly connected to two transverse rows in the middle of the lower battery case (1).
8. The power battery pack according to claim 7, wherein the transverse management sampling row is provided with a plurality of connecting blocks, and the connecting blocks are fixedly connected with the connecting plates at the top of the busbar (4).
9. A power battery according to claim 8, further comprising a battery top cover (8), said battery top cover (8) being removably mounted to the top of the battery mounting beam assembly (6).
10. A method for integrating a power battery pack, applied to the power battery pack as claimed in claim 9, comprising the steps of:
the heat conduction buffer structure (2) is attached to the bottom end inside the lower box body (1) of the battery pack, the electric support (3) is arranged on a frame beam of the lower box body (1) of the battery pack in an interference fit mode, the mounting position of the bus bar (4) is designed on the side portion of the electric support (3), and the bus bar (4) and the electric support (3) are integrated;
after the busbar (4) is integrated, the battery management sampling assembly (7) is assembled and integrated with the busbar (4), the battery management sampling assembly (7) is positioned at the top of the busbar (4), the battery management sampling assembly (7) is composed of a flexible circuit board, the flexible circuit board and the electric bracket (3) are assembled and integrated through an adhesive process, and the flexible circuit board and the busbar (4) are welded through ultrasonic waves;
the positive electrode and the negative electrode of the battery cell (5) are fixedly and electrically connected with a battery cell pole column (5-1), a pole column spring sheet (5-2) is fixedly welded at the end of the battery cell pole column (5-1), and a pole column spring (5-3) is fixedly assembled between the pole column spring sheet (5-2) and the battery cell pole column (5-1);
the battery cell polar posts (5-1) at two ends of the battery cell (5) are arranged and clamped between the positioning pits on the two groups of bus bars (4) in a limiting way;
after the assembly of the battery monomer (5), two ends of the battery pack fixing beam assembly (6) are respectively and fixedly arranged on two sides of a frame beam of the battery lower box body, and the battery pack upper cover (8) is fixedly arranged on the tops of the battery pack lower box body (1) and the battery pack fixing beam assembly (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310084710.6A CN116014372A (en) | 2023-02-01 | 2023-02-01 | Power battery pack and integration method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310084710.6A CN116014372A (en) | 2023-02-01 | 2023-02-01 | Power battery pack and integration method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116014372A true CN116014372A (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310084710.6A Pending CN116014372A (en) | 2023-02-01 | 2023-02-01 | Power battery pack and integration method |
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| Country | Link |
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| CN (1) | CN116014372A (en) |
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| KR20200084450A (en) * | 2018-12-26 | 2020-07-13 | 주식회사 엘지화학 | A battery module with efficient assembly structure, a battery pack and a vehicle comprising the same |
| CN111554848A (en) * | 2020-05-18 | 2020-08-18 | 桑顿新能源科技(长沙)有限公司 | Module box, soft packet of lithium cell module |
| CN113767520A (en) * | 2019-08-02 | 2021-12-07 | 株式会社Lg新能源 | Battery pack having movable bus bar assembly and secondary battery including the same |
| CN217656033U (en) * | 2022-06-17 | 2022-10-25 | 蜂巢能源科技股份有限公司 | Busbar support, busbar subassembly and battery package |
| CN218123661U (en) * | 2022-08-11 | 2022-12-23 | 楚能新能源股份有限公司 | Blade electricity core structure of establishing ties |
| CN218334049U (en) * | 2022-08-18 | 2023-01-17 | 合肥国轩高科动力能源有限公司 | Integrated form battery module |
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2023
- 2023-02-01 CN CN202310084710.6A patent/CN116014372A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200084450A (en) * | 2018-12-26 | 2020-07-13 | 주식회사 엘지화학 | A battery module with efficient assembly structure, a battery pack and a vehicle comprising the same |
| CN113767520A (en) * | 2019-08-02 | 2021-12-07 | 株式会社Lg新能源 | Battery pack having movable bus bar assembly and secondary battery including the same |
| CN111554848A (en) * | 2020-05-18 | 2020-08-18 | 桑顿新能源科技(长沙)有限公司 | Module box, soft packet of lithium cell module |
| CN217656033U (en) * | 2022-06-17 | 2022-10-25 | 蜂巢能源科技股份有限公司 | Busbar support, busbar subassembly and battery package |
| CN218123661U (en) * | 2022-08-11 | 2022-12-23 | 楚能新能源股份有限公司 | Blade electricity core structure of establishing ties |
| CN218334049U (en) * | 2022-08-18 | 2023-01-17 | 合肥国轩高科动力能源有限公司 | Integrated form battery module |
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